/* DWARF 2 debugging format support for GDB.
- Copyright 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
+ Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004
+ Free Software Foundation, Inc.
Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
Inc. with support from Florida State University (under contract
based on Fred Fish's (Cygnus Support) implementation of DWARF 1
support in dwarfread.c
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or (at
-your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or (at
+ your option) any later version.
-This program is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "bfd.h"
#include "symtab.h"
#include "gdbtypes.h"
-#include "symfile.h"
#include "objfiles.h"
#include "elf/dwarf2.h"
#include "buildsym.h"
#include "demangle.h"
#include "expression.h"
+#include "filenames.h" /* for DOSish file names */
+#include "macrotab.h"
#include "language.h"
#include "complaints.h"
+#include "bcache.h"
+#include "dwarf2expr.h"
+#include "dwarf2loc.h"
+#include "cp-support.h"
+#include "hashtab.h"
#include <fcntl.h>
#include "gdb_string.h"
+#include "gdb_assert.h"
#include <sys/types.h>
-/* .debug_info header for a compilation unit
+/* A note on memory usage for this file.
+
+ At the present time, this code reads the debug info sections into
+ the objfile's objfile_obstack. A definite improvement for startup
+ time, on platforms which do not emit relocations for debug
+ sections, would be to use mmap instead. The object's complete
+ debug information is loaded into memory, partly to simplify
+ absolute DIE references.
+
+ Whether using obstacks or mmap, the sections should remain loaded
+ until the objfile is released, and pointers into the section data
+ can be used for any other data associated to the objfile (symbol
+ names, type names, location expressions to name a few). */
+
+#ifndef DWARF2_REG_TO_REGNUM
+#define DWARF2_REG_TO_REGNUM(REG) (REG)
+#endif
+
+#if 0
+/* .debug_info header for a compilation unit
Because of alignment constraints, this structure has padding and cannot
be mapped directly onto the beginning of the .debug_info section. */
typedef struct comp_unit_header
}
_COMP_UNIT_HEADER;
#define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
+#endif
/* .debug_pubnames header
Because of alignment constraints, this structure has padding and cannot
}
_STATEMENT_PROLOGUE;
-/* offsets and sizes of debugging sections */
-
-static file_ptr dwarf_info_offset;
-static file_ptr dwarf_abbrev_offset;
-static file_ptr dwarf_line_offset;
-static file_ptr dwarf_pubnames_offset;
-static file_ptr dwarf_aranges_offset;
-static file_ptr dwarf_loc_offset;
-static file_ptr dwarf_macinfo_offset;
-static file_ptr dwarf_str_offset;
-
-static unsigned int dwarf_info_size;
-static unsigned int dwarf_abbrev_size;
-static unsigned int dwarf_line_size;
-static unsigned int dwarf_pubnames_size;
-static unsigned int dwarf_aranges_size;
-static unsigned int dwarf_loc_size;
-static unsigned int dwarf_macinfo_size;
-static unsigned int dwarf_str_size;
+static const struct objfile_data *dwarf2_objfile_data_key;
+
+struct dwarf2_per_objfile
+{
+ /* Sizes of debugging sections. */
+ unsigned int info_size;
+ unsigned int abbrev_size;
+ unsigned int line_size;
+ unsigned int pubnames_size;
+ unsigned int aranges_size;
+ unsigned int loc_size;
+ unsigned int macinfo_size;
+ unsigned int str_size;
+ unsigned int ranges_size;
+ unsigned int frame_size;
+ unsigned int eh_frame_size;
+
+ /* Loaded data from the sections. */
+ char *info_buffer;
+ char *abbrev_buffer;
+ char *line_buffer;
+ char *str_buffer;
+ char *macinfo_buffer;
+ char *ranges_buffer;
+ char *loc_buffer;
+};
+
+static struct dwarf2_per_objfile *dwarf2_per_objfile;
+
+static asection *dwarf_info_section;
+static asection *dwarf_abbrev_section;
+static asection *dwarf_line_section;
+static asection *dwarf_pubnames_section;
+static asection *dwarf_aranges_section;
+static asection *dwarf_loc_section;
+static asection *dwarf_macinfo_section;
+static asection *dwarf_str_section;
+static asection *dwarf_ranges_section;
+asection *dwarf_frame_section;
+asection *dwarf_eh_frame_section;
/* names of the debugging sections */
#define LOC_SECTION ".debug_loc"
#define MACINFO_SECTION ".debug_macinfo"
#define STR_SECTION ".debug_str"
+#define RANGES_SECTION ".debug_ranges"
+#define FRAME_SECTION ".debug_frame"
+#define EH_FRAME_SECTION ".eh_frame"
/* local data types */
-/* The data in a compilation unit header looks like this. */
+/* We hold several abbreviation tables in memory at the same time. */
+#ifndef ABBREV_HASH_SIZE
+#define ABBREV_HASH_SIZE 121
+#endif
+
+/* The data in a compilation unit header, after target2host
+ translation, looks like this. */
struct comp_unit_head
{
- unsigned int length;
+ unsigned long length;
short version;
unsigned int abbrev_offset;
unsigned char addr_size;
+ unsigned char signed_addr_p;
+ unsigned int offset_size; /* size of file offsets; either 4 or 8 */
+ unsigned int initial_length_size; /* size of the length field; either
+ 4 or 12 */
+
+ /* Offset to the first byte of this compilation unit header in the
+ * .debug_info section, for resolving relative reference dies. */
+
+ unsigned int offset;
+
+ /* Pointer to this compilation unit header in the .debug_info
+ * section */
+
+ char *cu_head_ptr;
+
+ /* Pointer to the first die of this compilatio unit. This will
+ * be the first byte following the compilation unit header. */
+
+ char *first_die_ptr;
+
+ /* Pointer to the next compilation unit header in the program. */
+
+ struct comp_unit_head *next;
+
+ /* Base address of this compilation unit. */
+
+ CORE_ADDR base_address;
+
+ /* Non-zero if base_address has been set. */
+
+ int base_known;
};
-/* The data in the .debug_line statement prologue looks like this. */
-struct line_head
+/* Internal state when decoding a particular compilation unit. */
+struct dwarf2_cu
+{
+ /* The objfile containing this compilation unit. */
+ struct objfile *objfile;
+
+ /* The header of the compilation unit.
+
+ FIXME drow/2003-11-10: Some of the things from the comp_unit_head
+ should logically be moved to the dwarf2_cu structure. */
+ struct comp_unit_head header;
+
+ struct function_range *first_fn, *last_fn, *cached_fn;
+
+ /* The language we are debugging. */
+ enum language language;
+ const struct language_defn *language_defn;
+
+ /* The generic symbol table building routines have separate lists for
+ file scope symbols and all all other scopes (local scopes). So
+ we need to select the right one to pass to add_symbol_to_list().
+ We do it by keeping a pointer to the correct list in list_in_scope.
+
+ FIXME: The original dwarf code just treated the file scope as the
+ first local scope, and all other local scopes as nested local
+ scopes, and worked fine. Check to see if we really need to
+ distinguish these in buildsym.c. */
+ struct pending **list_in_scope;
+
+ /* Maintain an array of referenced fundamental types for the current
+ compilation unit being read. For DWARF version 1, we have to construct
+ the fundamental types on the fly, since no information about the
+ fundamental types is supplied. Each such fundamental type is created by
+ calling a language dependent routine to create the type, and then a
+ pointer to that type is then placed in the array at the index specified
+ by it's FT_<TYPENAME> value. The array has a fixed size set by the
+ FT_NUM_MEMBERS compile time constant, which is the number of predefined
+ fundamental types gdb knows how to construct. */
+ struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
+
+ /* DWARF abbreviation table associated with this compilation unit. */
+ struct abbrev_info **dwarf2_abbrevs;
+
+ /* Storage for the abbrev table. */
+ struct obstack abbrev_obstack;
+
+ /* Hash table holding all the loaded partial DIEs. */
+ htab_t partial_dies;
+
+ /* Storage for things with the same lifetime as this read-in compilation
+ unit, including partial DIEs. */
+ struct obstack comp_unit_obstack;
+
+ /* This flag will be set if this compilation unit includes any
+ DW_TAG_namespace DIEs. If we know that there are explicit
+ DIEs for namespaces, we don't need to try to infer them
+ from mangled names. */
+ unsigned int has_namespace_info : 1;
+};
+
+/* The line number information for a compilation unit (found in the
+ .debug_line section) begins with a "statement program header",
+ which contains the following information. */
+struct line_header
+{
+ unsigned int total_length;
+ unsigned short version;
+ unsigned int header_length;
+ unsigned char minimum_instruction_length;
+ unsigned char default_is_stmt;
+ int line_base;
+ unsigned char line_range;
+ unsigned char opcode_base;
+
+ /* standard_opcode_lengths[i] is the number of operands for the
+ standard opcode whose value is i. This means that
+ standard_opcode_lengths[0] is unused, and the last meaningful
+ element is standard_opcode_lengths[opcode_base - 1]. */
+ unsigned char *standard_opcode_lengths;
+
+ /* The include_directories table. NOTE! These strings are not
+ allocated with xmalloc; instead, they are pointers into
+ debug_line_buffer. If you try to free them, `free' will get
+ indigestion. */
+ unsigned int num_include_dirs, include_dirs_size;
+ char **include_dirs;
+
+ /* The file_names table. NOTE! These strings are not allocated
+ with xmalloc; instead, they are pointers into debug_line_buffer.
+ Don't try to free them directly. */
+ unsigned int num_file_names, file_names_size;
+ struct file_entry
{
- unsigned int total_length;
- unsigned short version;
- unsigned int prologue_length;
- unsigned char minimum_instruction_length;
- unsigned char default_is_stmt;
- int line_base;
- unsigned char line_range;
- unsigned char opcode_base;
- unsigned char *standard_opcode_lengths;
- };
+ char *name;
+ unsigned int dir_index;
+ unsigned int mod_time;
+ unsigned int length;
+ int included_p; /* Non-zero if referenced by the Line Number Program. */
+ } *file_names;
+
+ /* The start and end of the statement program following this
+ header. These point into dwarf2_per_objfile->line_buffer. */
+ char *statement_program_start, *statement_program_end;
+};
/* When we construct a partial symbol table entry we only
need this much information. */
struct partial_die_info
{
- enum dwarf_tag tag;
- unsigned char has_children;
- unsigned char is_external;
- unsigned char is_declaration;
- unsigned char has_type;
+ /* Offset of this DIE. */
unsigned int offset;
- unsigned int abbrev;
+
+ /* DWARF-2 tag for this DIE. */
+ ENUM_BITFIELD(dwarf_tag) tag : 16;
+
+ /* Language code associated with this DIE. This is only used
+ for the compilation unit DIE. */
+ unsigned int language : 8;
+
+ /* Assorted flags describing the data found in this DIE. */
+ unsigned int has_children : 1;
+ unsigned int is_external : 1;
+ unsigned int is_declaration : 1;
+ unsigned int has_type : 1;
+ unsigned int has_specification : 1;
+ unsigned int has_stmt_list : 1;
+ unsigned int has_pc_info : 1;
+
+ /* Flag set if the SCOPE field of this structure has been
+ computed. */
+ unsigned int scope_set : 1;
+
+ /* The name of this DIE. Normally the value of DW_AT_name, but
+ sometimes DW_TAG_MIPS_linkage_name or a string computed in some
+ other fashion. */
char *name;
+ char *dirname;
+
+ /* The scope to prepend to our children. This is generally
+ allocated on the comp_unit_obstack, so will disappear
+ when this compilation unit leaves the cache. */
+ char *scope;
+
+ /* The location description associated with this DIE, if any. */
+ struct dwarf_block *locdesc;
+
+ /* If HAS_PC_INFO, the PC range associated with this DIE. */
CORE_ADDR lowpc;
CORE_ADDR highpc;
- struct dwarf_block *locdesc;
- unsigned int language;
+
+ /* Pointer into the info_buffer pointing at the target of
+ DW_AT_sibling, if any. */
char *sibling;
+
+ /* If HAS_SPECIFICATION, the offset of the DIE referred to by
+ DW_AT_specification (or DW_AT_abstract_origin or
+ DW_AT_extension). */
+ unsigned int spec_offset;
+
+ /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
+ unsigned int line_offset;
+
+ /* Pointers to this DIE's parent, first child, and next sibling,
+ if any. */
+ struct partial_die_info *die_parent, *die_child, *die_sibling;
};
/* This data structure holds the information of an abbrev. */
{
unsigned int number; /* number identifying abbrev */
enum dwarf_tag tag; /* dwarf tag */
- int has_children; /* boolean */
- unsigned int num_attrs; /* number of attributes */
+ unsigned short has_children; /* boolean */
+ unsigned short num_attrs; /* number of attributes */
struct attr_abbrev *attrs; /* an array of attribute descriptions */
struct abbrev_info *next; /* next in chain */
};
/* This data structure holds a complete die structure. */
struct die_info
{
- enum dwarf_tag tag; /* Tag indicating type of die */
- unsigned short has_children; /* Does the die have children */
- unsigned int abbrev; /* Abbrev number */
- unsigned int offset; /* Offset in .debug_info section */
- unsigned int num_attrs; /* Number of attributes */
- struct attribute *attrs; /* An array of attributes */
- struct die_info *next_ref; /* Next die in ref hash table */
- struct die_info *next; /* Next die in linked list */
- struct type *type; /* Cached type information */
+ enum dwarf_tag tag; /* Tag indicating type of die */
+ unsigned int abbrev; /* Abbrev number */
+ unsigned int offset; /* Offset in .debug_info section */
+ unsigned int num_attrs; /* Number of attributes */
+ struct attribute *attrs; /* An array of attributes */
+ struct die_info *next_ref; /* Next die in ref hash table */
+
+ /* The dies in a compilation unit form an n-ary tree. PARENT
+ points to this die's parent; CHILD points to the first child of
+ this node; and all the children of a given node are chained
+ together via their SIBLING fields, terminated by a die whose
+ tag is zero. */
+ struct die_info *child; /* Its first child, if any. */
+ struct die_info *sibling; /* Its next sibling, if any. */
+ struct die_info *parent; /* Its parent, if any. */
+
+ struct type *type; /* Cached type information */
};
/* Attributes have a name and a value */
{
char *str;
struct dwarf_block *blk;
- unsigned int unsnd;
- int snd;
+ unsigned long unsnd;
+ long int snd;
CORE_ADDR addr;
}
u;
};
+struct function_range
+{
+ const char *name;
+ CORE_ADDR lowpc, highpc;
+ int seen_line;
+ struct function_range *next;
+};
+
/* Get at parts of an attribute structure */
#define DW_STRING(attr) ((attr)->u.str)
char *data;
};
-/* We only hold one compilation unit's abbrevs in
- memory at any one time. */
-#ifndef ABBREV_HASH_SIZE
-#define ABBREV_HASH_SIZE 121
-#endif
#ifndef ATTR_ALLOC_CHUNK
#define ATTR_ALLOC_CHUNK 4
#endif
-static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
-
/* A hash table of die offsets for following references. */
#ifndef REF_HASH_SIZE
#define REF_HASH_SIZE 1021
static struct die_info *die_ref_table[REF_HASH_SIZE];
-/* Obstack for allocating temporary storage used during symbol reading. */
-static struct obstack dwarf2_tmp_obstack;
-
-/* Offset to the first byte of the current compilation unit header,
- for resolving relative reference dies. */
-static unsigned int cu_header_offset;
-
/* Allocate fields for structs, unions and enums in this size. */
#ifndef DW_FIELD_ALLOC_CHUNK
#define DW_FIELD_ALLOC_CHUNK 4
#endif
-/* The language we are debugging. */
-static enum language cu_language;
-static const struct language_defn *cu_language_defn;
-
-/* Actually data from the sections. */
-static char *dwarf_info_buffer;
-static char *dwarf_abbrev_buffer;
-static char *dwarf_line_buffer;
-
/* A zeroed version of a partial die for initialization purposes. */
static struct partial_die_info zeroed_partial_die;
-/* The generic symbol table building routines have separate lists for
- file scope symbols and all all other scopes (local scopes). So
- we need to select the right one to pass to add_symbol_to_list().
- We do it by keeping a pointer to the correct list in list_in_scope.
-
- FIXME: The original dwarf code just treated the file scope as the first
- local scope, and all other local scopes as nested local scopes, and worked
- fine. Check to see if we really need to distinguish these
- in buildsym.c. */
-static struct pending **list_in_scope = &file_symbols;
-
-/* FIXME: The following variables pass additional information from
- decode_locdesc to the caller. */
-static int optimized_out; /* Kludge to identify optimized out variables */
-static int isreg; /* Kludge to identify register variables */
-static int offreg; /* Kludge to identify basereg references */
-static int basereg; /* Which base register is it relative to? */
-static int islocal; /* Kludge to identify local variables */
-
-/* DW_AT_frame_base values for the current function.
- frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
- contains the register number for the frame register.
- frame_base_offset is the offset from the frame register to the
- virtual stack frame. */
-static int frame_base_reg;
-static CORE_ADDR frame_base_offset;
-
-/* This value is added to each symbol value. FIXME: Generalize to
- the section_offsets structure used by dbxread (once this is done,
- pass the appropriate section number to end_symtab). */
-static CORE_ADDR baseaddr; /* Add to each symbol value */
+/* FIXME: decode_locdesc sets these variables to describe the location
+ to the caller. These ought to be a structure or something. If
+ none of the flags are set, the object lives at the address returned
+ by decode_locdesc. */
+
+static int isreg; /* Object lives in register.
+ decode_locdesc's return value is
+ the register number. */
/* We put a pointer to this structure in the read_symtab_private field
- of the psymtab.
- The complete dwarf information for an objfile is kept in the
- psymbol_obstack, so that absolute die references can be handled.
- Most of the information in this structure is related to an entire
- object file and could be passed via the sym_private field of the objfile.
- It is however conceivable that dwarf2 might not be the only type
- of symbols read from an object file. */
+ of the psymtab. */
struct dwarf2_pinfo
-{
- /* Pointer to start of dwarf info buffer for the objfile. */
-
- char *dwarf_info_buffer;
-
- /* Offset in dwarf_info_buffer for this compilation unit. */
-
- unsigned long dwarf_info_offset;
-
- /* Pointer to start of dwarf abbreviation buffer for the objfile. */
-
- char *dwarf_abbrev_buffer;
-
- /* Size of dwarf abbreviation section for the objfile. */
-
- unsigned int dwarf_abbrev_size;
-
- /* Pointer to start of dwarf line buffer for the objfile. */
+ {
+ /* Offset in .debug_info for this compilation unit. */
- char *dwarf_line_buffer;
-};
+ unsigned long dwarf_info_offset;
+ };
#define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
-#define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
#define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
-#define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
-#define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
-#define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
-
-/* Maintain an array of referenced fundamental types for the current
- compilation unit being read. For DWARF version 1, we have to construct
- the fundamental types on the fly, since no information about the
- fundamental types is supplied. Each such fundamental type is created by
- calling a language dependent routine to create the type, and then a
- pointer to that type is then placed in the array at the index specified
- by it's FT_<TYPENAME> value. The array has a fixed size set by the
- FT_NUM_MEMBERS compile time constant, which is the number of predefined
- fundamental types gdb knows how to construct. */
-static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
/* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
but this would require a corresponding change in unpack_field_as_long
pass lists of data member fields and lists of member function fields
in an instance of a field_info structure, as defined below. */
struct field_info
-{
- /* List of data member and baseclasses fields. */
- struct nextfield
- {
- struct nextfield *next;
- int accessibility;
- int virtuality;
- struct field field;
- } *fields;
-
- /* Number of fields. */
- int nfields;
-
- /* Number of baseclasses. */
- int nbaseclasses;
+ {
+ /* List of data member and baseclasses fields. */
+ struct nextfield
+ {
+ struct nextfield *next;
+ int accessibility;
+ int virtuality;
+ struct field field;
+ }
+ *fields;
- /* Set if the accesibility of one of the fields is not public. */
- int non_public_fields;
+ /* Number of fields. */
+ int nfields;
- /* Member function fields array, entries are allocated in the order they
- are encountered in the object file. */
- struct nextfnfield
- {
- struct nextfnfield *next;
- struct fn_field fnfield;
- } *fnfields;
+ /* Number of baseclasses. */
+ int nbaseclasses;
- /* Member function fieldlist array, contains name of possibly overloaded
- member function, number of overloaded member functions and a pointer
- to the head of the member function field chain. */
- struct fnfieldlist
- {
- char *name;
- int length;
- struct nextfnfield *head;
- } *fnfieldlists;
+ /* Set if the accesibility of one of the fields is not public. */
+ int non_public_fields;
- /* Number of entries in the fnfieldlists array. */
- int nfnfields;
-};
+ /* Member function fields array, entries are allocated in the order they
+ are encountered in the object file. */
+ struct nextfnfield
+ {
+ struct nextfnfield *next;
+ struct fn_field fnfield;
+ }
+ *fnfields;
-/* FIXME: Kludge to mark a varargs function type for C++ member function
- argument processing. */
-#define TYPE_FLAG_VARARGS (1 << 10)
+ /* Member function fieldlist array, contains name of possibly overloaded
+ member function, number of overloaded member functions and a pointer
+ to the head of the member function field chain. */
+ struct fnfieldlist
+ {
+ char *name;
+ int length;
+ struct nextfnfield *head;
+ }
+ *fnfieldlists;
-/* Dwarf2 has no clean way to discern C++ static and non-static member
- functions. G++ helps GDB by marking the first parameter for non-static
- member functions (which is the this pointer) as artificial.
- We pass this information between dwarf2_add_member_fn and
- read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
-#define TYPE_FIELD_ARTIFICIAL TYPE_FIELD_BITPOS
+ /* Number of entries in the fnfieldlists array. */
+ int nfnfields;
+ };
/* Various complaints about symbol reading that don't abort the process */
-static struct complaint dwarf2_const_ignored =
-{
- "type qualifier 'const' ignored", 0, 0
-};
-static struct complaint dwarf2_volatile_ignored =
-{
- "type qualifier 'volatile' ignored", 0, 0
-};
-static struct complaint dwarf2_non_const_array_bound_ignored =
-{
- "non-constant array bounds form '%s' ignored", 0, 0
-};
-static struct complaint dwarf2_missing_line_number_section =
-{
- "missing .debug_line section", 0, 0
-};
-static struct complaint dwarf2_mangled_line_number_section =
-{
- "mangled .debug_line section", 0, 0
-};
-static struct complaint dwarf2_unsupported_die_ref_attr =
-{
- "unsupported die ref attribute form: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_stack_op =
-{
- "unsupported stack op: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_tag =
-{
- "unsupported tag: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_at_encoding =
-{
- "unsupported DW_AT_encoding: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_at_frame_base =
-{
- "unsupported DW_AT_frame_base for function '%s'", 0, 0
-};
-static struct complaint dwarf2_unexpected_tag =
-{
- "unexepected tag in read_type_die: '%s'", 0, 0
-};
-static struct complaint dwarf2_missing_at_frame_base =
-{
- "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0
-};
-static struct complaint dwarf2_bad_static_member_name =
-{
- "unrecognized static data member name '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_accessibility =
-{
- "unsupported accessibility %d", 0, 0
-};
-static struct complaint dwarf2_bad_member_name_complaint =
-{
- "cannot extract member name from '%s'", 0, 0
-};
-static struct complaint dwarf2_missing_member_fn_type_complaint =
-{
- "member function type missing for '%s'", 0, 0
-};
-static struct complaint dwarf2_vtbl_not_found_complaint =
+static void
+dwarf2_statement_list_fits_in_line_number_section_complaint (void)
{
- "virtual function table pointer not found when defining class '%s'", 0, 0
-};
-static struct complaint dwarf2_absolute_sibling_complaint =
+ complaint (&symfile_complaints,
+ "statement list doesn't fit in .debug_line section");
+}
+
+static void
+dwarf2_complex_location_expr_complaint (void)
{
- "ignoring absolute DW_AT_sibling", 0, 0
-};
-static struct complaint dwarf2_const_value_length_mismatch =
+ complaint (&symfile_complaints, "location expression too complex");
+}
+
+static void
+dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
+ int arg3)
{
- "const value length mismatch for '%s', got %d, expected %d", 0, 0
-};
-static struct complaint dwarf2_unsupported_const_value_attr =
+ complaint (&symfile_complaints,
+ "const value length mismatch for '%s', got %d, expected %d", arg1,
+ arg2, arg3);
+}
+
+static void
+dwarf2_macros_too_long_complaint (void)
{
- "unsupported const value attribute form: '%s'", 0, 0
-};
+ complaint (&symfile_complaints,
+ "macro info runs off end of `.debug_macinfo' section");
+}
-/* Remember the addr_size read from the dwarf.
- If a target expects to link compilation units with differing address
- sizes, gdb needs to be sure that the appropriate size is here for
- whatever scope is currently getting read. */
-static int address_size;
+static void
+dwarf2_macro_malformed_definition_complaint (const char *arg1)
+{
+ complaint (&symfile_complaints,
+ "macro debug info contains a malformed macro definition:\n`%s'",
+ arg1);
+}
-/* Externals references. */
-extern int info_verbose; /* From main.c; nonzero => verbose */
+static void
+dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
+{
+ complaint (&symfile_complaints,
+ "invalid attribute class or form for '%s' in '%s'", arg1, arg2);
+}
/* local function prototypes */
-static void dwarf2_locate_sections PARAMS ((bfd *, asection *, PTR));
+static void dwarf2_locate_sections (bfd *, asection *, void *);
#if 0
-static void dwarf2_build_psymtabs_easy PARAMS ((struct objfile *,
- struct section_offsets *,
- int));
+static void dwarf2_build_psymtabs_easy (struct objfile *, int);
#endif
-static void dwarf2_build_psymtabs_hard PARAMS ((struct objfile *,
- struct section_offsets *,
- int));
+static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
+ struct objfile *);
+
+static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
+ struct partial_die_info *,
+ struct partial_symtab *);
+
+static void dwarf2_build_psymtabs_hard (struct objfile *, int);
+
+static void scan_partial_symbols (struct partial_die_info *,
+ CORE_ADDR *, CORE_ADDR *,
+ struct dwarf2_cu *);
+
+static void add_partial_symbol (struct partial_die_info *,
+ struct dwarf2_cu *);
+
+static int pdi_needs_namespace (enum dwarf_tag tag);
+
+static void add_partial_namespace (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu);
+
+static void add_partial_enumeration (struct partial_die_info *enum_pdi,
+ struct dwarf2_cu *cu);
+
+static char *locate_pdi_sibling (struct partial_die_info *orig_pdi,
+ char *info_ptr,
+ bfd *abfd,
+ struct dwarf2_cu *cu);
+
+static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
+
+static void psymtab_to_symtab_1 (struct partial_symtab *);
-static char *scan_partial_symbols PARAMS ((char *, struct objfile *,
- CORE_ADDR *, CORE_ADDR *));
+char *dwarf2_read_section (struct objfile *, asection *);
-static void add_partial_symbol PARAMS ((struct partial_die_info *,
- struct objfile *));
+static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
-static void dwarf2_psymtab_to_symtab PARAMS ((struct partial_symtab *));
+static void dwarf2_free_abbrev_table (void *);
-static void psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
+static struct abbrev_info *peek_die_abbrev (char *, int *, struct dwarf2_cu *);
-static char *dwarf2_read_section PARAMS ((struct objfile *, file_ptr,
- unsigned int));
+static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
+ struct dwarf2_cu *);
-static void dwarf2_read_abbrevs PARAMS ((bfd *, unsigned int));
+static struct partial_die_info *load_partial_dies (bfd *, char *, int,
+ struct dwarf2_cu *);
-static void dwarf2_empty_abbrev_table PARAMS ((PTR));
+static char *read_partial_die (struct partial_die_info *,
+ struct abbrev_info *abbrev, unsigned int,
+ bfd *, char *, struct dwarf2_cu *);
-static struct abbrev_info *dwarf2_lookup_abbrev PARAMS ((unsigned int));
+static struct partial_die_info *find_partial_die (unsigned long,
+ struct dwarf2_cu *,
+ struct dwarf2_cu **);
-static char *read_partial_die PARAMS ((struct partial_die_info *,
- bfd *, char *, int *));
+static void fixup_partial_die (struct partial_die_info *,
+ struct dwarf2_cu *);
-static char *read_full_die PARAMS ((struct die_info **, bfd *, char *));
+static char *read_full_die (struct die_info **, bfd *, char *,
+ struct dwarf2_cu *, int *);
-static char *read_attribute PARAMS ((struct attribute *, struct attr_abbrev *,
- bfd *, char *));
+static char *read_attribute (struct attribute *, struct attr_abbrev *,
+ bfd *, char *, struct dwarf2_cu *);
-static unsigned int read_1_byte PARAMS ((bfd *, char *));
+static char *read_attribute_value (struct attribute *, unsigned,
+ bfd *, char *, struct dwarf2_cu *);
-static int read_1_signed_byte PARAMS ((bfd *, char *));
+static unsigned int read_1_byte (bfd *, char *);
-static unsigned int read_2_bytes PARAMS ((bfd *, char *));
+static int read_1_signed_byte (bfd *, char *);
-static unsigned int read_4_bytes PARAMS ((bfd *, char *));
+static unsigned int read_2_bytes (bfd *, char *);
-static unsigned int read_8_bytes PARAMS ((bfd *, char *));
+static unsigned int read_4_bytes (bfd *, char *);
-static CORE_ADDR read_address PARAMS ((bfd *, char *));
+static unsigned long read_8_bytes (bfd *, char *);
-static char *read_n_bytes PARAMS ((bfd *, char *, unsigned int));
+static CORE_ADDR read_address (bfd *, char *ptr, struct dwarf2_cu *,
+ int *bytes_read);
-static char *read_string PARAMS ((bfd *, char *, unsigned int *));
+static LONGEST read_initial_length (bfd *, char *,
+ struct comp_unit_head *, int *bytes_read);
-static unsigned int read_unsigned_leb128 PARAMS ((bfd *, char *,
- unsigned int *));
+static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *,
+ int *bytes_read);
-static int read_signed_leb128 PARAMS ((bfd *, char *, unsigned int *));
+static char *read_n_bytes (bfd *, char *, unsigned int);
-static void set_cu_language PARAMS ((unsigned int));
+static char *read_string (bfd *, char *, unsigned int *);
-static struct attribute *dwarf_attr PARAMS ((struct die_info *,
- unsigned int));
+static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *,
+ unsigned int *);
-static void dwarf_decode_lines PARAMS ((unsigned int, char *, bfd *));
+static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *);
-static void dwarf2_start_subfile PARAMS ((char *, char *));
+static long read_signed_leb128 (bfd *, char *, unsigned int *);
-static struct symbol *new_symbol PARAMS ((struct die_info *, struct type *,
- struct objfile *));
+static char *skip_leb128 (bfd *, char *);
-static void dwarf2_const_value PARAMS ((struct attribute *, struct symbol *,
- struct objfile *));
+static void set_cu_language (unsigned int, struct dwarf2_cu *);
-static struct type *die_type PARAMS ((struct die_info *, struct objfile *));
+static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
+ struct dwarf2_cu *);
-static struct type *die_containing_type PARAMS ((struct die_info *,
- struct objfile *));
+static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
+ struct dwarf2_cu *cu);
+
+static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
+
+static struct die_info *die_specification (struct die_info *die,
+ struct dwarf2_cu *);
+
+static void free_line_header (struct line_header *lh);
+
+static void add_file_name (struct line_header *, char *, unsigned int,
+ unsigned int, unsigned int);
+
+static struct line_header *(dwarf_decode_line_header
+ (unsigned int offset,
+ bfd *abfd, struct dwarf2_cu *cu));
+
+static void dwarf_decode_lines (struct line_header *, char *, bfd *,
+ struct dwarf2_cu *, struct partial_symtab *);
+
+static void dwarf2_start_subfile (char *, char *);
+
+static struct symbol *new_symbol (struct die_info *, struct type *,
+ struct dwarf2_cu *);
+
+static void dwarf2_const_value (struct attribute *, struct symbol *,
+ struct dwarf2_cu *);
+
+static void dwarf2_const_value_data (struct attribute *attr,
+ struct symbol *sym,
+ int bits);
+
+static struct type *die_type (struct die_info *, struct dwarf2_cu *);
+
+static struct type *die_containing_type (struct die_info *,
+ struct dwarf2_cu *);
#if 0
-static struct type *type_at_offset PARAMS ((unsigned int, struct objfile *));
+static struct type *type_at_offset (unsigned int, struct objfile *);
#endif
-static struct type *tag_type_to_type PARAMS ((struct die_info *,
- struct objfile *));
+static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
+
+static void read_type_die (struct die_info *, struct dwarf2_cu *);
+
+static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
+
+static char *typename_concat (const char *prefix, const char *suffix);
-static void read_type_die PARAMS ((struct die_info *, struct objfile *));
+static void read_typedef (struct die_info *, struct dwarf2_cu *);
-static void read_typedef PARAMS ((struct die_info *, struct objfile *));
+static void read_base_type (struct die_info *, struct dwarf2_cu *);
-static void read_base_type PARAMS ((struct die_info *, struct objfile *));
+static void read_subrange_type (struct die_info *die, struct dwarf2_cu *cu);
-static void read_file_scope PARAMS ((struct die_info *, struct objfile *));
+static void read_file_scope (struct die_info *, struct dwarf2_cu *);
-static void read_func_scope PARAMS ((struct die_info *, struct objfile *));
+static void read_func_scope (struct die_info *, struct dwarf2_cu *);
-static void read_lexical_block_scope PARAMS ((struct die_info *,
- struct objfile *));
+static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
-static int dwarf2_get_pc_bounds PARAMS ((struct die_info *,
- CORE_ADDR *, CORE_ADDR *,
- struct objfile *));
+static int dwarf2_get_pc_bounds (struct die_info *,
+ CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *);
-static void dwarf2_add_field PARAMS ((struct field_info *, struct die_info *,
- struct objfile *));
+static void get_scope_pc_bounds (struct die_info *,
+ CORE_ADDR *, CORE_ADDR *,
+ struct dwarf2_cu *);
-static void dwarf2_attach_fields_to_type PARAMS ((struct field_info *,
- struct type *,
- struct objfile *));
+static void dwarf2_add_field (struct field_info *, struct die_info *,
+ struct dwarf2_cu *);
-static char *skip_member_fn_name PARAMS ((char *));
+static void dwarf2_attach_fields_to_type (struct field_info *,
+ struct type *, struct dwarf2_cu *);
-static void dwarf2_add_member_fn PARAMS ((struct field_info *,
- struct die_info *, struct type *,
- struct objfile *objfile));
+static void dwarf2_add_member_fn (struct field_info *,
+ struct die_info *, struct type *,
+ struct dwarf2_cu *);
-static void dwarf2_attach_fn_fields_to_type PARAMS ((struct field_info *,
- struct type *,
- struct objfile *));
+static void dwarf2_attach_fn_fields_to_type (struct field_info *,
+ struct type *, struct dwarf2_cu *);
-static void read_structure_scope PARAMS ((struct die_info *, struct objfile *));
+static void read_structure_type (struct die_info *, struct dwarf2_cu *);
-static void read_common_block PARAMS ((struct die_info *, struct objfile *));
+static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
-static void read_enumeration PARAMS ((struct die_info *, struct objfile *));
+static char *determine_class_name (struct die_info *die, struct dwarf2_cu *cu);
-static struct type *dwarf_base_type PARAMS ((int, int, struct objfile *));
+static void read_common_block (struct die_info *, struct dwarf2_cu *);
-static CORE_ADDR decode_locdesc PARAMS ((struct dwarf_block *,
- struct objfile *));
+static void read_namespace (struct die_info *die, struct dwarf2_cu *);
-static void read_array_type PARAMS ((struct die_info *, struct objfile *));
+static const char *namespace_name (struct die_info *die,
+ int *is_anonymous, struct dwarf2_cu *);
-static void read_tag_pointer_type PARAMS ((struct die_info *,
- struct objfile *));
+static void read_enumeration_type (struct die_info *, struct dwarf2_cu *);
-static void read_tag_ptr_to_member_type PARAMS ((struct die_info *,
- struct objfile *));
+static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
-static void read_tag_reference_type PARAMS ((struct die_info *,
- struct objfile *));
+static struct type *dwarf_base_type (int, int, struct dwarf2_cu *);
-static void read_tag_const_type PARAMS ((struct die_info *, struct objfile *));
+static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
-static void read_tag_volatile_type PARAMS ((struct die_info *,
- struct objfile *));
+static void read_array_type (struct die_info *, struct dwarf2_cu *);
-static void read_tag_string_type PARAMS ((struct die_info *,
- struct objfile *));
+static void read_tag_pointer_type (struct die_info *, struct dwarf2_cu *);
-static void read_subroutine_type PARAMS ((struct die_info *,
- struct objfile *));
+static void read_tag_ptr_to_member_type (struct die_info *,
+ struct dwarf2_cu *);
-struct die_info *read_comp_unit PARAMS ((char *, bfd *));
+static void read_tag_reference_type (struct die_info *, struct dwarf2_cu *);
-static void free_die_list PARAMS ((struct die_info *));
+static void read_tag_const_type (struct die_info *, struct dwarf2_cu *);
-static void process_die PARAMS ((struct die_info *, struct objfile *));
+static void read_tag_volatile_type (struct die_info *, struct dwarf2_cu *);
-static char *dwarf2_linkage_name PARAMS ((struct die_info *));
+static void read_tag_string_type (struct die_info *, struct dwarf2_cu *);
-static char *dwarf_tag_name PARAMS ((unsigned int));
+static void read_subroutine_type (struct die_info *, struct dwarf2_cu *);
-static char *dwarf_attr_name PARAMS ((unsigned int));
+static struct die_info *read_comp_unit (char *, bfd *, struct dwarf2_cu *);
-static char *dwarf_form_name PARAMS ((unsigned int));
+static struct die_info *read_die_and_children (char *info_ptr, bfd *abfd,
+ struct dwarf2_cu *,
+ char **new_info_ptr,
+ struct die_info *parent);
-static char *dwarf_stack_op_name PARAMS ((unsigned int));
+static struct die_info *read_die_and_siblings (char *info_ptr, bfd *abfd,
+ struct dwarf2_cu *,
+ char **new_info_ptr,
+ struct die_info *parent);
-static char *dwarf_bool_name PARAMS ((unsigned int));
+static void free_die_list (struct die_info *);
-static char *dwarf_type_encoding_name PARAMS ((unsigned int));
+static struct cleanup *make_cleanup_free_die_list (struct die_info *);
+
+static void process_die (struct die_info *, struct dwarf2_cu *);
+
+static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
+
+static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
+
+static struct die_info *dwarf2_extension (struct die_info *die,
+ struct dwarf2_cu *);
+
+static char *dwarf_tag_name (unsigned int);
+
+static char *dwarf_attr_name (unsigned int);
+
+static char *dwarf_form_name (unsigned int);
+
+static char *dwarf_stack_op_name (unsigned int);
+
+static char *dwarf_bool_name (unsigned int);
+
+static char *dwarf_type_encoding_name (unsigned int);
#if 0
-static char *dwarf_cfi_name PARAMS ((unsigned int));
+static char *dwarf_cfi_name (unsigned int);
-struct die_info *copy_die PARAMS ((struct die_info *));
+struct die_info *copy_die (struct die_info *);
#endif
-struct die_info *sibling_die PARAMS ((struct die_info *));
+static struct die_info *sibling_die (struct die_info *);
-void dump_die PARAMS ((struct die_info *));
+static void dump_die (struct die_info *);
-void dump_die_list PARAMS ((struct die_info *));
+static void dump_die_list (struct die_info *);
-void store_in_ref_table PARAMS ((unsigned int, struct die_info *));
+static void store_in_ref_table (unsigned int, struct die_info *);
-static void dwarf2_empty_die_ref_table PARAMS ((void));
+static void dwarf2_empty_hash_tables (void);
-static unsigned int dwarf2_get_ref_die_offset PARAMS ((struct attribute *));
+static unsigned int dwarf2_get_ref_die_offset (struct attribute *,
+ struct dwarf2_cu *);
-struct die_info *follow_die_ref PARAMS ((unsigned int));
+static int dwarf2_get_attr_constant_value (struct attribute *, int);
-static struct type *dwarf2_fundamental_type PARAMS ((struct objfile *, int));
+static struct die_info *follow_die_ref (unsigned int);
+
+static struct type *dwarf2_fundamental_type (struct objfile *, int,
+ struct dwarf2_cu *);
/* memory allocation interface */
-static void dwarf2_free_tmp_obstack PARAMS ((PTR));
+static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
+
+static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
+
+static struct die_info *dwarf_alloc_die (void);
+
+static void initialize_cu_func_list (struct dwarf2_cu *);
+
+static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
+ struct dwarf2_cu *);
-static struct dwarf_block *dwarf_alloc_block PARAMS ((void));
+static void dwarf_decode_macros (struct line_header *, unsigned int,
+ char *, bfd *, struct dwarf2_cu *);
-static struct abbrev_info *dwarf_alloc_abbrev PARAMS ((void));
+static int attr_form_is_block (struct attribute *);
-static struct die_info *dwarf_alloc_die PARAMS ((void));
+static void
+dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu);
+
+static char *skip_one_die (char *info_ptr, struct abbrev_info *abbrev,
+ struct dwarf2_cu *cu);
+
+static void free_stack_comp_unit (void *);
+
+static void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
+
+static void dummy_obstack_deallocate (void *object, void *data);
+
+static hashval_t partial_die_hash (const void *item);
+
+static int partial_die_eq (const void *item_lhs, const void *item_rhs);
/* Try to locate the sections we need for DWARF 2 debugging
information and return true if we have enough to do something. */
int
-dwarf2_has_info (abfd)
- bfd *abfd;
+dwarf2_has_info (struct objfile *objfile)
{
- dwarf_info_offset = dwarf_abbrev_offset = dwarf_line_offset = 0;
- bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL);
- if (dwarf_info_offset && dwarf_abbrev_offset)
- {
- return 1;
- }
- else
- {
- return 0;
- }
+ struct dwarf2_per_objfile *data;
+
+ /* Initialize per-objfile state. */
+ data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
+ memset (data, 0, sizeof (*data));
+ set_objfile_data (objfile, dwarf2_objfile_data_key, data);
+ dwarf2_per_objfile = data;
+
+ dwarf_info_section = 0;
+ dwarf_abbrev_section = 0;
+ dwarf_line_section = 0;
+ dwarf_str_section = 0;
+ dwarf_macinfo_section = 0;
+ dwarf_frame_section = 0;
+ dwarf_eh_frame_section = 0;
+ dwarf_ranges_section = 0;
+ dwarf_loc_section = 0;
+
+ bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
+ return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
}
/* This function is mapped across the sections and remembers the
in. */
static void
-dwarf2_locate_sections (ignore_abfd, sectp, ignore_ptr)
- bfd *ignore_abfd;
- asection *sectp;
- PTR ignore_ptr;
+dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, void *ignore_ptr)
{
- if (STREQ (sectp->name, INFO_SECTION))
+ if (strcmp (sectp->name, INFO_SECTION) == 0)
{
- dwarf_info_offset = sectp->filepos;
- dwarf_info_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->info_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_info_section = sectp;
}
- else if (STREQ (sectp->name, ABBREV_SECTION))
+ else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
{
- dwarf_abbrev_offset = sectp->filepos;
- dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->abbrev_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_abbrev_section = sectp;
}
- else if (STREQ (sectp->name, LINE_SECTION))
+ else if (strcmp (sectp->name, LINE_SECTION) == 0)
{
- dwarf_line_offset = sectp->filepos;
- dwarf_line_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->line_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_line_section = sectp;
}
- else if (STREQ (sectp->name, PUBNAMES_SECTION))
+ else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
{
- dwarf_pubnames_offset = sectp->filepos;
- dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->pubnames_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_pubnames_section = sectp;
}
- else if (STREQ (sectp->name, ARANGES_SECTION))
+ else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
{
- dwarf_aranges_offset = sectp->filepos;
- dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->aranges_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_aranges_section = sectp;
}
- else if (STREQ (sectp->name, LOC_SECTION))
+ else if (strcmp (sectp->name, LOC_SECTION) == 0)
{
- dwarf_loc_offset = sectp->filepos;
- dwarf_loc_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->loc_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_loc_section = sectp;
}
- else if (STREQ (sectp->name, MACINFO_SECTION))
+ else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
{
- dwarf_macinfo_offset = sectp->filepos;
- dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->macinfo_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_macinfo_section = sectp;
}
- else if (STREQ (sectp->name, STR_SECTION))
+ else if (strcmp (sectp->name, STR_SECTION) == 0)
{
- dwarf_str_offset = sectp->filepos;
- dwarf_str_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->str_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_str_section = sectp;
+ }
+ else if (strcmp (sectp->name, FRAME_SECTION) == 0)
+ {
+ dwarf2_per_objfile->frame_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_frame_section = sectp;
+ }
+ else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
+ {
+ flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
+ if (aflag & SEC_HAS_CONTENTS)
+ {
+ dwarf2_per_objfile->eh_frame_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_eh_frame_section = sectp;
+ }
+ }
+ else if (strcmp (sectp->name, RANGES_SECTION) == 0)
+ {
+ dwarf2_per_objfile->ranges_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf_ranges_section = sectp;
}
}
/* Build a partial symbol table. */
void
-dwarf2_build_psymtabs (objfile, section_offsets, mainline)
- struct objfile *objfile;
- struct section_offsets *section_offsets;
- int mainline;
+dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
{
-
/* We definitely need the .debug_info and .debug_abbrev sections */
- dwarf_info_buffer = dwarf2_read_section (objfile,
- dwarf_info_offset,
- dwarf_info_size);
- dwarf_abbrev_buffer = dwarf2_read_section (objfile,
- dwarf_abbrev_offset,
- dwarf_abbrev_size);
- dwarf_line_buffer = dwarf2_read_section (objfile,
- dwarf_line_offset,
- dwarf_line_size);
+ dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section);
+ dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section);
+
+ if (dwarf_line_section)
+ dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section);
+ else
+ dwarf2_per_objfile->line_buffer = NULL;
+
+ if (dwarf_str_section)
+ dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section);
+ else
+ dwarf2_per_objfile->str_buffer = NULL;
+
+ if (dwarf_macinfo_section)
+ dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile,
+ dwarf_macinfo_section);
+ else
+ dwarf2_per_objfile->macinfo_buffer = NULL;
+
+ if (dwarf_ranges_section)
+ dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section);
+ else
+ dwarf2_per_objfile->ranges_buffer = NULL;
+
+ if (dwarf_loc_section)
+ dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section);
+ else
+ dwarf2_per_objfile->loc_buffer = NULL;
- if (mainline || objfile->global_psymbols.size == 0 ||
- objfile->static_psymbols.size == 0)
+ if (mainline
+ || (objfile->global_psymbols.size == 0
+ && objfile->static_psymbols.size == 0))
{
init_psymbol_list (objfile, 1024);
}
#if 0
if (dwarf_aranges_offset && dwarf_pubnames_offset)
{
- /* Things are significanlty easier if we have .debug_aranges and
+ /* Things are significantly easier if we have .debug_aranges and
.debug_pubnames sections */
- dwarf2_build_psymtabs_easy (objfile, section_offsets, mainline);
+ dwarf2_build_psymtabs_easy (objfile, mainline);
}
else
#endif
/* only test this case for now */
- {
+ {
/* In this case we have to work a bit harder */
- dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline);
+ dwarf2_build_psymtabs_hard (objfile, mainline);
}
}
.debug_pubnames and .debug_aranges sections. */
static void
-dwarf2_build_psymtabs_easy (objfile, section_offsets, mainline)
- struct objfile *objfile;
- struct section_offsets *section_offsets;
- int mainline;
+dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
{
bfd *abfd = objfile->obfd;
char *aranges_buffer, *pubnames_buffer;
unsigned int entry_length, version, info_offset, info_size;
pubnames_buffer = dwarf2_read_section (objfile,
- dwarf_pubnames_offset,
- dwarf_pubnames_size);
+ dwarf_pubnames_section);
pubnames_ptr = pubnames_buffer;
- while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size)
+ while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
{
- entry_length = read_4_bytes (abfd, pubnames_ptr);
- pubnames_ptr += 4;
+ struct comp_unit_head cu_header;
+ int bytes_read;
+
+ entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
+ &bytes_read);
+ pubnames_ptr += bytes_read;
version = read_1_byte (abfd, pubnames_ptr);
pubnames_ptr += 1;
info_offset = read_4_bytes (abfd, pubnames_ptr);
}
aranges_buffer = dwarf2_read_section (objfile,
- dwarf_aranges_offset,
- dwarf_aranges_size);
+ dwarf_aranges_section);
}
#endif
+/* Read in the comp unit header information from the debug_info at
+ info_ptr. */
+
+static char *
+read_comp_unit_head (struct comp_unit_head *cu_header,
+ char *info_ptr, bfd *abfd)
+{
+ int signed_addr;
+ int bytes_read;
+ cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
+ &bytes_read);
+ info_ptr += bytes_read;
+ cu_header->version = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
+ &bytes_read);
+ info_ptr += bytes_read;
+ cu_header->addr_size = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ signed_addr = bfd_get_sign_extend_vma (abfd);
+ if (signed_addr < 0)
+ internal_error (__FILE__, __LINE__,
+ "read_comp_unit_head: dwarf from non elf file");
+ cu_header->signed_addr_p = signed_addr;
+ return info_ptr;
+}
+
+static char *
+partial_read_comp_unit_head (struct comp_unit_head *header, char *info_ptr,
+ bfd *abfd)
+{
+ char *beg_of_comp_unit = info_ptr;
+
+ info_ptr = read_comp_unit_head (header, info_ptr, abfd);
+
+ if (header->version != 2)
+ error ("Dwarf Error: wrong version in compilation unit header "
+ "(is %d, should be %d) [in module %s]", header->version,
+ 2, bfd_get_filename (abfd));
+
+ if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size)
+ error ("Dwarf Error: bad offset (0x%lx) in compilation unit header "
+ "(offset 0x%lx + 6) [in module %s]",
+ (long) header->abbrev_offset,
+ (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
+ bfd_get_filename (abfd));
+
+ if (beg_of_comp_unit + header->length + header->initial_length_size
+ > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
+ error ("Dwarf Error: bad length (0x%lx) in compilation unit header "
+ "(offset 0x%lx + 0) [in module %s]",
+ (long) header->length,
+ (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
+ bfd_get_filename (abfd));
+
+ return info_ptr;
+}
+
+/* Allocate a new partial symtab for file named NAME and mark this new
+ partial symtab as being an include of PST. */
+
+static void
+dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
+ struct objfile *objfile)
+{
+ struct partial_symtab *subpst = allocate_psymtab (name, objfile);
+
+ subpst->section_offsets = pst->section_offsets;
+ subpst->textlow = 0;
+ subpst->texthigh = 0;
+
+ subpst->dependencies = (struct partial_symtab **)
+ obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct partial_symtab *));
+ subpst->dependencies[0] = pst;
+ subpst->number_of_dependencies = 1;
+
+ subpst->globals_offset = 0;
+ subpst->n_global_syms = 0;
+ subpst->statics_offset = 0;
+ subpst->n_static_syms = 0;
+ subpst->symtab = NULL;
+ subpst->read_symtab = pst->read_symtab;
+ subpst->readin = 0;
+
+ /* No private part is necessary for include psymtabs. This property
+ can be used to differentiate between such include psymtabs and
+ the regular ones. If it ever happens that a regular psymtab can
+ legitimally have a NULL private part, then we'll have to add a
+ dedicated field for that in the dwarf2_pinfo structure. */
+ subpst->read_symtab_private = NULL;
+}
+
+/* Read the Line Number Program data and extract the list of files
+ included by the source file represented by PST. Build an include
+ partial symtab for each of these included files.
+
+ This procedure assumes that there *is* a Line Number Program in
+ the given CU. Callers should check that PDI->HAS_STMT_LIST is set
+ before calling this procedure. */
+
+static void
+dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
+ struct partial_die_info *pdi,
+ struct partial_symtab *pst)
+{
+ struct objfile *objfile = cu->objfile;
+ bfd *abfd = objfile->obfd;
+ struct line_header *lh;
+
+ lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu);
+ if (lh == NULL)
+ return; /* No linetable, so no includes. */
+
+ dwarf_decode_lines (lh, NULL, abfd, cu, pst);
+
+ free_line_header (lh);
+}
+
+
/* Build the partial symbol table by doing a quick pass through the
.debug_info and .debug_abbrev sections. */
static void
-dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline)
- struct objfile *objfile;
- struct section_offsets *section_offsets;
- int mainline;
+dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
{
/* Instead of reading this into a big buffer, we should probably use
mmap() on architectures that support it. (FIXME) */
bfd *abfd = objfile->obfd;
- char *info_ptr, *abbrev_ptr;
+ char *info_ptr;
char *beg_of_comp_unit;
- struct comp_unit_head cu_header;
struct partial_die_info comp_unit_die;
struct partial_symtab *pst;
- struct cleanup *back_to;
- int comp_unit_has_pc_info;
- CORE_ADDR lowpc, highpc;
+ CORE_ADDR lowpc, highpc, baseaddr;
- info_ptr = dwarf_info_buffer;
- abbrev_ptr = dwarf_abbrev_buffer;
+ info_ptr = dwarf2_per_objfile->info_buffer;
- obstack_init (&dwarf2_tmp_obstack);
- back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
+ /* Since the objects we're extracting from .debug_info vary in
+ length, only the individual functions to extract them (like
+ read_comp_unit_head and load_partial_die) can really know whether
+ the buffer is large enough to hold another complete object.
- while ((unsigned int) (info_ptr - dwarf_info_buffer)
- + ((info_ptr - dwarf_info_buffer) % 4) < dwarf_info_size)
+ At the moment, they don't actually check that. If .debug_info
+ holds just one extra byte after the last compilation unit's dies,
+ then read_comp_unit_head will happily read off the end of the
+ buffer. read_partial_die is similarly casual. Those functions
+ should be fixed.
+
+ For this loop condition, simply checking whether there's any data
+ left at all should be sufficient. */
+ while (info_ptr < (dwarf2_per_objfile->info_buffer
+ + dwarf2_per_objfile->info_size))
{
+ struct cleanup *back_to_inner;
+ struct dwarf2_cu cu;
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+ struct dwarf2_per_cu_data *this_cu;
+
beg_of_comp_unit = info_ptr;
- cu_header.length = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- cu_header.version = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- cu_header.addr_size = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- address_size = cu_header.addr_size;
- if (cu_header.version != 2)
- {
- error ("Dwarf Error: wrong version in compilation unit header.");
- return;
- }
- if (cu_header.abbrev_offset >= dwarf_abbrev_size)
- {
- error ("Dwarf Error: bad offset in compilation unit header.");
- return;
- }
- if (beg_of_comp_unit + cu_header.length + 4
- >= dwarf_info_buffer + dwarf_info_size)
- {
- error ("Dwarf Error: bad length in compilation unit header.");
- return;
- }
+ memset (&cu, 0, sizeof (cu));
+
+ obstack_init (&cu.comp_unit_obstack);
+
+ back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
+
+ cu.objfile = objfile;
+ info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd);
+
+ /* Complete the cu_header */
+ cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
+ cu.header.first_die_ptr = info_ptr;
+ cu.header.cu_head_ptr = beg_of_comp_unit;
+
+ cu.list_in_scope = &file_symbols;
+
+ cu.partial_dies = NULL;
/* Read the abbrevs for this compilation unit into a table */
- dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
- make_cleanup (dwarf2_empty_abbrev_table, NULL);
+ dwarf2_read_abbrevs (abfd, &cu);
+ make_cleanup (dwarf2_free_abbrev_table, &cu);
/* Read the compilation unit die */
- info_ptr = read_partial_die (&comp_unit_die, abfd,
- info_ptr, &comp_unit_has_pc_info);
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu);
+ info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
+ abfd, info_ptr, &cu);
/* Set the language we're debugging */
- set_cu_language (comp_unit_die.language);
+ set_cu_language (comp_unit_die.language, &cu);
/* Allocate a new partial symbol table structure */
- pst = start_psymtab_common (objfile, section_offsets,
- comp_unit_die.name ? comp_unit_die.name : "",
+ pst = start_psymtab_common (objfile, objfile->section_offsets,
+ comp_unit_die.name ? comp_unit_die.name : "",
comp_unit_die.lowpc,
objfile->global_psymbols.next,
objfile->static_psymbols.next);
+ if (comp_unit_die.dirname)
+ pst->dirname = xstrdup (comp_unit_die.dirname);
+
pst->read_symtab_private = (char *)
- obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo));
- cu_header_offset = beg_of_comp_unit - dwarf_info_buffer;
- DWARF_INFO_BUFFER(pst) = dwarf_info_buffer;
- DWARF_INFO_OFFSET(pst) = beg_of_comp_unit - dwarf_info_buffer;
- DWARF_ABBREV_BUFFER(pst) = dwarf_abbrev_buffer;
- DWARF_ABBREV_SIZE(pst) = dwarf_abbrev_size;
- DWARF_LINE_BUFFER(pst) = dwarf_line_buffer;
- baseaddr = ANOFFSET (section_offsets, 0);
+ obstack_alloc (&objfile->objfile_obstack, sizeof (struct dwarf2_pinfo));
+ DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
/* Store the function that reads in the rest of the symbol table */
pst->read_symtab = dwarf2_psymtab_to_symtab;
If so, read the rest of the partial symbols from this comp unit.
If not, there's no more debug_info for this comp unit. */
if (comp_unit_die.has_children)
- info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc);
-
- /* If the compilation unit didn't have an explicit address range,
- then use the information extracted from its child dies. */
- if (!comp_unit_has_pc_info)
{
- comp_unit_die.lowpc = lowpc;
- comp_unit_die.highpc = highpc;
- }
- pst->textlow = comp_unit_die.lowpc + baseaddr;
+ struct partial_die_info *first_die;
+
+ lowpc = ((CORE_ADDR) -1);
+ highpc = ((CORE_ADDR) 0);
+
+ first_die = load_partial_dies (abfd, info_ptr, 1, &cu);
+
+ scan_partial_symbols (first_die, &lowpc, &highpc, &cu);
+
+ /* If we didn't find a lowpc, set it to highpc to avoid
+ complaints from `maint check'. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
+
+ /* If the compilation unit didn't have an explicit address range,
+ then use the information extracted from its child dies. */
+ if (! comp_unit_die.has_pc_info)
+ {
+ comp_unit_die.lowpc = lowpc;
+ comp_unit_die.highpc = highpc;
+ }
+ }
+ pst->textlow = comp_unit_die.lowpc + baseaddr;
pst->texthigh = comp_unit_die.highpc + baseaddr;
pst->n_global_syms = objfile->global_psymbols.next -
also happen.) This happens in VxWorks. */
free_named_symtabs (pst->filename);
- info_ptr = beg_of_comp_unit + cu_header.length + 4;
+ if (comp_unit_die.has_stmt_list)
+ {
+ /* Get the list of files included in the current compilation unit,
+ and build a psymtab for each of them. */
+ dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst);
+ }
+
+ info_ptr = beg_of_comp_unit + cu.header.length
+ + cu.header.initial_length_size;
+
+ do_cleanups (back_to_inner);
}
- do_cleanups (back_to);
}
-/* Read in all interesting dies to the end of the compilation unit. */
+/* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
+ Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
+ in CU. */
-static char *
-scan_partial_symbols (info_ptr, objfile, lowpc, highpc)
- char *info_ptr;
- struct objfile *objfile;
- CORE_ADDR *lowpc;
- CORE_ADDR *highpc;
+static void
+scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
bfd *abfd = objfile->obfd;
- struct partial_die_info pdi;
+ struct partial_die_info *pdi;
- /* This function is called after we've read in the comp_unit_die in
- order to read its children. We start the nesting level at 1 since
- we have pushed 1 level down in order to read the comp unit's children.
- The comp unit itself is at level 0, so we stop reading when we pop
- back to that level. */
+ /* Now, march along the PDI's, descending into ones which have
+ interesting children but skipping the children of the other ones,
+ until we reach the end of the compilation unit. */
- int nesting_level = 1;
- int has_pc_info;
-
- *lowpc = ((CORE_ADDR) -1);
- *highpc = ((CORE_ADDR) 0);
+ pdi = first_die;
- while (nesting_level)
+ while (pdi != NULL)
{
- info_ptr = read_partial_die (&pdi, abfd, info_ptr, &has_pc_info);
+ fixup_partial_die (pdi, cu);
- if (pdi.name)
+ /* Anonymous namespaces have no name but have interesting
+ children, so we need to look at them. Ditto for anonymous
+ enums. */
+
+ if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
+ || pdi->tag == DW_TAG_enumeration_type)
{
- switch (pdi.tag)
+ switch (pdi->tag)
{
case DW_TAG_subprogram:
- if (has_pc_info)
+ if (pdi->has_pc_info)
{
- if (pdi.lowpc < *lowpc)
+ if (pdi->lowpc < *lowpc)
{
- *lowpc = pdi.lowpc;
+ *lowpc = pdi->lowpc;
}
- if (pdi.highpc > *highpc)
+ if (pdi->highpc > *highpc)
{
- *highpc = pdi.highpc;
+ *highpc = pdi->highpc;
}
- if ((pdi.is_external || nesting_level == 1)
- && !pdi.is_declaration)
+ if (!pdi->is_declaration)
{
- add_partial_symbol (&pdi, objfile);
+ add_partial_symbol (pdi, cu);
}
}
break;
case DW_TAG_variable:
case DW_TAG_typedef:
+ case DW_TAG_union_type:
+ if (!pdi->is_declaration)
+ {
+ add_partial_symbol (pdi, cu);
+ }
+ break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- if ((pdi.is_external || nesting_level == 1)
- && !pdi.is_declaration)
+ if (!pdi->is_declaration)
{
- add_partial_symbol (&pdi, objfile);
+ add_partial_symbol (pdi, cu);
}
break;
- case DW_TAG_enumerator:
- /* File scope enumerators are added to the partial symbol
- table. */
- if (nesting_level == 2)
- add_partial_symbol (&pdi, objfile);
+ case DW_TAG_enumeration_type:
+ if (!pdi->is_declaration)
+ add_partial_enumeration (pdi, cu);
break;
case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
/* File scope base type definitions are added to the partial
- symbol table. */
- if (nesting_level == 1)
- add_partial_symbol (&pdi, objfile);
+ symbol table. */
+ add_partial_symbol (pdi, cu);
+ break;
+ case DW_TAG_namespace:
+ add_partial_namespace (pdi, lowpc, highpc, cu);
break;
default:
break;
}
}
- /* If the die has a sibling, skip to the sibling.
- Do not skip enumeration types, we want to record their
- enumerators. */
- if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type)
- {
- info_ptr = pdi.sibling;
- }
- else if (pdi.has_children)
- {
- /* Die has children, but the optional DW_AT_sibling attribute
- is missing. */
- nesting_level++;
- }
+ /* If the die has a sibling, skip to the sibling. */
- if (pdi.tag == 0)
- {
- nesting_level--;
- }
+ pdi = pdi->die_sibling;
}
+}
- /* If we didn't find a lowpc, set it to highpc to avoid complaints
- from `maint check'. */
- if (*lowpc == ((CORE_ADDR) -1))
- *lowpc = *highpc;
- return info_ptr;
+/* Functions used to compute the fully scoped name of a partial DIE.
+
+ Normally, this is simple. For C++, the parent DIE's fully scoped
+ name is concatenated with "::" and the partial DIE's name.
+ Enumerators are an exception; they use the scope of their parent
+ enumeration type, i.e. the name of the enumeration type is not
+ prepended to the enumerator.
+
+ There are two complexities. One is DW_AT_specification; in this
+ case "parent" means the parent of the target of the specification,
+ instead of the direct parent of the DIE. The other is compilers
+ which do not emit DW_TAG_namespace; in this case we try to guess
+ the fully qualified name of structure types from their members'
+ linkage names. This must be done using the DIE's children rather
+ than the children of any DW_AT_specification target. We only need
+ to do this for structures at the top level, i.e. if the target of
+ any DW_AT_specification (if any; otherwise the DIE itself) does not
+ have a parent. */
+
+/* Compute the scope prefix associated with PDI's parent, in
+ compilation unit CU. The result will be allocated on CU's
+ comp_unit_obstack, or a copy of the already allocated PDI->NAME
+ field. NULL is returned if no prefix is necessary. */
+static char *
+partial_die_parent_scope (struct partial_die_info *pdi,
+ struct dwarf2_cu *cu)
+{
+ char *grandparent_scope;
+ struct partial_die_info *parent, *real_pdi;
+ struct dwarf2_cu *spec_cu;
+
+ /* We need to look at our parent DIE; if we have a DW_AT_specification,
+ then this means the parent of the specification DIE. */
+
+ real_pdi = pdi;
+ spec_cu = cu;
+ while (real_pdi->has_specification)
+ real_pdi = find_partial_die (real_pdi->spec_offset, spec_cu, &spec_cu);
+
+ parent = real_pdi->die_parent;
+ if (parent == NULL)
+ return NULL;
+
+ if (parent->scope_set)
+ return parent->scope;
+
+ fixup_partial_die (parent, cu);
+
+ grandparent_scope = partial_die_parent_scope (parent, spec_cu);
+
+ if (parent->tag == DW_TAG_namespace
+ || parent->tag == DW_TAG_structure_type
+ || parent->tag == DW_TAG_class_type
+ || parent->tag == DW_TAG_union_type)
+ {
+ if (grandparent_scope == NULL)
+ parent->scope = parent->name;
+ else
+ parent->scope = obconcat (&cu->comp_unit_obstack, grandparent_scope,
+ "::", parent->name);
+ }
+ else if (parent->tag == DW_TAG_enumeration_type)
+ /* Enumerators should not get the name of the enumeration as a prefix. */
+ parent->scope = grandparent_scope;
+ else
+ {
+ /* FIXME drow/2004-04-01: What should we be doing with
+ function-local names? For partial symbols, we should probably be
+ ignoring them. */
+ complaint (&symfile_complaints,
+ "unhandled containing DIE tag %d for DIE at %d",
+ parent->tag, pdi->offset);
+ parent->scope = grandparent_scope;
+ }
+
+ parent->scope_set = 1;
+ return parent->scope;
+}
+
+/* Return the fully scoped name associated with PDI, from compilation unit
+ CU. The result will be allocated with malloc. */
+static char *
+partial_die_full_name (struct partial_die_info *pdi,
+ struct dwarf2_cu *cu)
+{
+ char *parent_scope;
+
+ parent_scope = partial_die_parent_scope (pdi, cu);
+ if (parent_scope == NULL)
+ return NULL;
+ else
+ return concat (parent_scope, "::", pdi->name, NULL);
}
static void
-add_partial_symbol (pdi, objfile)
- struct partial_die_info *pdi;
- struct objfile *objfile;
+add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
CORE_ADDR addr = 0;
+ char *actual_name;
+ const char *my_prefix;
+ const struct partial_symbol *psym = NULL;
+ CORE_ADDR baseaddr;
+ int built_actual_name = 0;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ actual_name = NULL;
+
+ if (pdi_needs_namespace (pdi->tag))
+ {
+ actual_name = partial_die_full_name (pdi, cu);
+ if (actual_name)
+ built_actual_name = 1;
+ }
+
+ if (actual_name == NULL)
+ actual_name = pdi->name;
switch (pdi->tag)
{
case DW_TAG_subprogram:
if (pdi->is_external)
{
- prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
- mst_text, objfile);
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_BLOCK,
- &objfile->global_psymbols,
- 0, pdi->lowpc + baseaddr, cu_language, objfile);
+ /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
+ mst_text, objfile); */
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_BLOCK,
+ &objfile->global_psymbols,
+ 0, pdi->lowpc + baseaddr,
+ cu->language, objfile);
}
else
{
- prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
- mst_file_text, objfile);
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_BLOCK,
- &objfile->static_psymbols,
- 0, pdi->lowpc + baseaddr, cu_language, objfile);
+ /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
+ mst_file_text, objfile); */
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_BLOCK,
+ &objfile->static_psymbols,
+ 0, pdi->lowpc + baseaddr,
+ cu->language, objfile);
}
break;
case DW_TAG_variable:
table building. */
if (pdi->locdesc)
- addr = decode_locdesc (pdi->locdesc, objfile);
+ addr = decode_locdesc (pdi->locdesc, cu);
if (pdi->locdesc || pdi->has_type)
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_STATIC,
- &objfile->global_psymbols,
- 0, addr + baseaddr, cu_language, objfile);
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_STATIC,
+ &objfile->global_psymbols,
+ 0, addr + baseaddr,
+ cu->language, objfile);
}
else
{
/* Static Variable. Skip symbols without location descriptors. */
if (pdi->locdesc == NULL)
return;
- addr = decode_locdesc (pdi->locdesc, objfile);
- prim_record_minimal_symbol (pdi->name, addr + baseaddr,
- mst_file_data, objfile);
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_STATIC,
- &objfile->static_psymbols,
- 0, addr + baseaddr, cu_language, objfile);
+ addr = decode_locdesc (pdi->locdesc, cu);
+ /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
+ mst_file_data, objfile); */
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_STATIC,
+ &objfile->static_psymbols,
+ 0, addr + baseaddr,
+ cu->language, objfile);
}
break;
case DW_TAG_typedef:
case DW_TAG_base_type:
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_TYPEDEF,
+ case DW_TAG_subrange_type:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_TYPEDEF,
&objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+ break;
+ case DW_TAG_namespace:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &objfile->global_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
/* Skip aggregate types without children, these are external
- references. */
+ references. */
+ /* NOTE: carlton/2003-10-07: See comment in new_symbol about
+ static vs. global. */
if (pdi->has_children == 0)
return;
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- STRUCT_NAMESPACE, LOC_TYPEDEF,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
-
- if (cu_language == language_cplus)
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ STRUCT_DOMAIN, LOC_TYPEDEF,
+ cu->language == language_cplus
+ ? &objfile->global_psymbols
+ : &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+
+ if (cu->language == language_cplus)
{
/* For C++, these implicitly act as typedefs as well. */
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_TYPEDEF,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &objfile->global_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
}
break;
case DW_TAG_enumerator:
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_CONST,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ VAR_DOMAIN, LOC_CONST,
+ cu->language == language_cplus
+ ? &objfile->global_psymbols
+ : &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
break;
default:
break;
}
+
+ /* Check to see if we should scan the name for possible namespace
+ info. Only do this if this is C++, if we don't have namespace
+ debugging info in the file, if the psym is of an appropriate type
+ (otherwise we'll have psym == NULL), and if we actually had a
+ mangled name to begin with. */
+
+ /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
+ cases which do not set PSYM above? */
+
+ if (cu->language == language_cplus
+ && cu->has_namespace_info == 0
+ && psym != NULL
+ && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
+ cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
+ objfile);
+
+ if (built_actual_name)
+ xfree (actual_name);
+}
+
+/* Determine whether a die of type TAG living in a C++ class or
+ namespace needs to have the name of the scope prepended to the
+ name listed in the die. */
+
+static int
+pdi_needs_namespace (enum dwarf_tag tag)
+{
+ switch (tag)
+ {
+ case DW_TAG_namespace:
+ case DW_TAG_typedef:
+ case DW_TAG_class_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+/* Read a partial die corresponding to a namespace; also, add a symbol
+ corresponding to that namespace to the symbol table. NAMESPACE is
+ the name of the enclosing namespace. */
+
+static void
+add_partial_namespace (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+
+ /* Add a symbol for the namespace. */
+
+ add_partial_symbol (pdi, cu);
+
+ /* Now scan partial symbols in that namespace. */
+
+ if (pdi->has_children)
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, cu);
+}
+
+/* See if we can figure out if the class lives in a namespace. We do
+ this by looking for a member function; its demangled name will
+ contain namespace info, if there is any. */
+
+static void
+guess_structure_name (struct partial_die_info *struct_pdi,
+ struct dwarf2_cu *cu)
+{
+ if (cu->language == language_cplus
+ && cu->has_namespace_info == 0
+ && struct_pdi->has_children)
+ {
+ /* NOTE: carlton/2003-10-07: Getting the info this way changes
+ what template types look like, because the demangler
+ frequently doesn't give the same name as the debug info. We
+ could fix this by only using the demangled name to get the
+ prefix (but see comment in read_structure_type). */
+
+ struct partial_die_info *child_pdi = struct_pdi->die_child;
+ struct partial_die_info *real_pdi;
+ struct dwarf2_cu *spec_cu;
+
+ /* If this DIE (this DIE's specification, if any) has a parent, then
+ we should not do this. We'll prepend the parent's fully qualified
+ name when we create the partial symbol. */
+
+ real_pdi = struct_pdi;
+ spec_cu = cu;
+ while (real_pdi->has_specification)
+ real_pdi = find_partial_die (real_pdi->spec_offset, spec_cu, &spec_cu);
+
+ if (real_pdi->die_parent != NULL)
+ return;
+
+ while (child_pdi != NULL)
+ {
+ if (child_pdi->tag == DW_TAG_subprogram)
+ {
+ char *actual_class_name
+ = class_name_from_physname (child_pdi->name);
+ if (actual_class_name != NULL)
+ {
+ struct_pdi->name
+ = obsavestring (actual_class_name,
+ strlen (actual_class_name),
+ &cu->comp_unit_obstack);
+ xfree (actual_class_name);
+ }
+ break;
+ }
+
+ child_pdi = child_pdi->die_sibling;
+ }
+ }
+}
+
+/* Read a partial die corresponding to an enumeration type. */
+
+static void
+add_partial_enumeration (struct partial_die_info *enum_pdi,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ bfd *abfd = objfile->obfd;
+ struct partial_die_info *pdi;
+
+ if (enum_pdi->name != NULL)
+ add_partial_symbol (enum_pdi, cu);
+
+ pdi = enum_pdi->die_child;
+ while (pdi)
+ {
+ if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
+ complaint (&symfile_complaints, "malformed enumerator DIE ignored");
+ else
+ add_partial_symbol (pdi, cu);
+ pdi = pdi->die_sibling;
+ }
+}
+
+/* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
+ Return the corresponding abbrev, or NULL if the number is zero (indicating
+ an empty DIE). In either case *BYTES_READ will be set to the length of
+ the initial number. */
+
+static struct abbrev_info *
+peek_die_abbrev (char *info_ptr, int *bytes_read, struct dwarf2_cu *cu)
+{
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int abbrev_number;
+ struct abbrev_info *abbrev;
+
+ abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
+
+ if (abbrev_number == 0)
+ return NULL;
+
+ abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ if (!abbrev)
+ {
+ error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number,
+ bfd_get_filename (abfd));
+ }
+
+ return abbrev;
+}
+
+/* Scan the debug information for CU starting at INFO_PTR. Returns a
+ pointer to the end of a series of DIEs, terminated by an empty
+ DIE. Any children of the skipped DIEs will also be skipped. */
+
+static char *
+skip_children (char *info_ptr, struct dwarf2_cu *cu)
+{
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+
+ while (1)
+ {
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
+ if (abbrev == NULL)
+ return info_ptr + bytes_read;
+ else
+ info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
+ }
+}
+
+/* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
+ should point just after the initial uleb128 of a DIE, and the
+ abbrev corresponding to that skipped uleb128 should be passed in
+ ABBREV. Returns a pointer to this DIE's sibling, skipping any
+ children. */
+
+static char *
+skip_one_die (char *info_ptr, struct abbrev_info *abbrev,
+ struct dwarf2_cu *cu)
+{
+ unsigned int bytes_read;
+ struct attribute attr;
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int form, i;
+
+ for (i = 0; i < abbrev->num_attrs; i++)
+ {
+ /* The only abbrev we care about is DW_AT_sibling. */
+ if (abbrev->attrs[i].name == DW_AT_sibling)
+ {
+ read_attribute (&attr, &abbrev->attrs[i],
+ abfd, info_ptr, cu);
+ if (attr.form == DW_FORM_ref_addr)
+ complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling");
+ else
+ return dwarf2_per_objfile->info_buffer
+ + dwarf2_get_ref_die_offset (&attr, cu);
+ }
+
+ /* If it isn't DW_AT_sibling, skip this attribute. */
+ form = abbrev->attrs[i].form;
+ skip_attribute:
+ switch (form)
+ {
+ case DW_FORM_addr:
+ case DW_FORM_ref_addr:
+ info_ptr += cu->header.addr_size;
+ break;
+ case DW_FORM_data1:
+ case DW_FORM_ref1:
+ case DW_FORM_flag:
+ info_ptr += 1;
+ break;
+ case DW_FORM_data2:
+ case DW_FORM_ref2:
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ case DW_FORM_ref4:
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ case DW_FORM_ref8:
+ info_ptr += 8;
+ break;
+ case DW_FORM_string:
+ read_string (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_strp:
+ info_ptr += cu->header.offset_size;
+ break;
+ case DW_FORM_block:
+ info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_block1:
+ info_ptr += 1 + read_1_byte (abfd, info_ptr);
+ break;
+ case DW_FORM_block2:
+ info_ptr += 2 + read_2_bytes (abfd, info_ptr);
+ break;
+ case DW_FORM_block4:
+ info_ptr += 4 + read_4_bytes (abfd, info_ptr);
+ break;
+ case DW_FORM_sdata:
+ case DW_FORM_udata:
+ case DW_FORM_ref_udata:
+ info_ptr = skip_leb128 (abfd, info_ptr);
+ break;
+ case DW_FORM_indirect:
+ form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ /* We need to continue parsing from here, so just go back to
+ the top. */
+ goto skip_attribute;
+
+ default:
+ error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
+ }
+ }
+
+ if (abbrev->has_children)
+ return skip_children (info_ptr, cu);
+ else
+ return info_ptr;
+}
+
+/* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
+ the next DIE after ORIG_PDI. */
+
+static char *
+locate_pdi_sibling (struct partial_die_info *orig_pdi, char *info_ptr,
+ bfd *abfd, struct dwarf2_cu *cu)
+{
+ /* Do we know the sibling already? */
+
+ if (orig_pdi->sibling)
+ return orig_pdi->sibling;
+
+ /* Are there any children to deal with? */
+
+ if (!orig_pdi->has_children)
+ return info_ptr;
+
+ /* Skip the children the long way. */
+
+ return skip_children (info_ptr, cu);
}
/* Expand this partial symbol table into a full symbol table. */
static void
-dwarf2_psymtab_to_symtab (pst)
- struct partial_symtab *pst;
+dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
{
/* FIXME: This is barely more than a stub. */
if (pst != NULL)
}
static void
-psymtab_to_symtab_1 (pst)
- struct partial_symtab *pst;
+psymtab_to_symtab_1 (struct partial_symtab *pst)
{
struct objfile *objfile = pst->objfile;
bfd *abfd = objfile->obfd;
- struct comp_unit_head cu_header;
+ struct dwarf2_cu cu;
struct die_info *dies;
unsigned long offset;
CORE_ADDR lowpc, highpc;
char *info_ptr;
struct symtab *symtab;
struct cleanup *back_to;
+ struct attribute *attr;
+ CORE_ADDR baseaddr;
+ int i;
+
+ for (i = 0; i < pst->number_of_dependencies; i++)
+ if (!pst->dependencies[i]->readin)
+ {
+ /* Inform about additional files that need to be read in. */
+ if (info_verbose)
+ {
+ fputs_filtered (" ", gdb_stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("%s...", pst->dependencies[i]->filename);
+ wrap_here (""); /* Flush output */
+ gdb_flush (gdb_stdout);
+ }
+ psymtab_to_symtab_1 (pst->dependencies[i]);
+ }
+
+ if (pst->read_symtab_private == NULL)
+ {
+ /* It's an include file, no symbols to read for it.
+ Everything is in the parent symtab. */
+ pst->readin = 1;
+ return;
+ }
+
+ dwarf2_per_objfile = objfile_data (pst->objfile, dwarf2_objfile_data_key);
/* Set local variables from the partial symbol table info. */
- offset = DWARF_INFO_OFFSET(pst);
- dwarf_info_buffer = DWARF_INFO_BUFFER(pst);
- dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER(pst);
- dwarf_abbrev_size = DWARF_ABBREV_SIZE(pst);
- dwarf_line_buffer = DWARF_LINE_BUFFER(pst);
- baseaddr = ANOFFSET (pst->section_offsets, 0);
- cu_header_offset = offset;
- info_ptr = dwarf_info_buffer + offset;
-
- obstack_init (&dwarf2_tmp_obstack);
- back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
+ offset = DWARF_INFO_OFFSET (pst);
+
+ info_ptr = dwarf2_per_objfile->info_buffer + offset;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ /* We're in the global namespace. */
+ processing_current_prefix = "";
+
+ obstack_init (&cu.comp_unit_obstack);
+ back_to = make_cleanup (free_stack_comp_unit, &cu);
buildsym_init ();
make_cleanup (really_free_pendings, NULL);
+ cu.objfile = objfile;
+
/* read in the comp_unit header */
- cu_header.length = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- cu_header.version = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- cu_header.addr_size = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
+ info_ptr = read_comp_unit_head (&cu.header, info_ptr, abfd);
/* Read the abbrevs for this compilation unit */
- dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
- make_cleanup (dwarf2_empty_abbrev_table, NULL);
+ dwarf2_read_abbrevs (abfd, &cu);
+ make_cleanup (dwarf2_free_abbrev_table, &cu);
- dies = read_comp_unit (info_ptr, abfd);
+ cu.header.offset = offset;
- make_cleanup (free_die_list, dies);
+ cu.list_in_scope = &file_symbols;
- /* Do line number decoding in read_file_scope () */
- process_die (dies, objfile);
+ dies = read_comp_unit (info_ptr, abfd, &cu);
- if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile))
+ make_cleanup_free_die_list (dies);
+
+ /* Find the base address of the compilation unit for range lists and
+ location lists. It will normally be specified by DW_AT_low_pc.
+ In DWARF-3 draft 4, the base address could be overridden by
+ DW_AT_entry_pc. It's been removed, but GCC still uses this for
+ compilation units with discontinuous ranges. */
+
+ cu.header.base_known = 0;
+ cu.header.base_address = 0;
+
+ attr = dwarf2_attr (dies, DW_AT_entry_pc, &cu);
+ if (attr)
{
- /* Some compilers don't define a DW_AT_high_pc attribute for
- the compilation unit. If the DW_AT_high_pc is missing,
- synthesize it, by scanning the DIE's below the compilation unit. */
- highpc = 0;
- if (dies->has_children)
+ cu.header.base_address = DW_ADDR (attr);
+ cu.header.base_known = 1;
+ }
+ else
+ {
+ attr = dwarf2_attr (dies, DW_AT_low_pc, &cu);
+ if (attr)
{
- child_die = dies->next;
- while (child_die && child_die->tag)
- {
- if (child_die->tag == DW_TAG_subprogram)
- {
- CORE_ADDR low, high;
-
- if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
- {
- highpc = max (highpc, high);
- }
- }
- child_die = sibling_die (child_die);
- }
+ cu.header.base_address = DW_ADDR (attr);
+ cu.header.base_known = 1;
}
}
- symtab = end_symtab (highpc + baseaddr, objfile, 0);
+
+ /* Do line number decoding in read_file_scope () */
+ process_die (dies, &cu);
+
+ /* Some compilers don't define a DW_AT_high_pc attribute for the
+ compilation unit. If the DW_AT_high_pc is missing, synthesize
+ it, by scanning the DIE's below the compilation unit. */
+ get_scope_pc_bounds (dies, &lowpc, &highpc, &cu);
+
+ symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
/* Set symtab language to language from DW_AT_language.
If the compilation is from a C file generated by language preprocessors,
do not set the language if it was already deduced by start_subfile. */
if (symtab != NULL
- && !(cu_language == language_c && symtab->language != language_c))
+ && !(cu.language == language_c && symtab->language != language_c))
{
- symtab->language = cu_language;
+ symtab->language = cu.language;
}
pst->symtab = symtab;
pst->readin = 1;
- sort_symtab_syms (pst->symtab);
do_cleanups (back_to);
}
/* Process a die and its children. */
static void
-process_die (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+process_die (struct die_info *die, struct dwarf2_cu *cu)
{
switch (die->tag)
{
case DW_TAG_padding:
break;
case DW_TAG_compile_unit:
- read_file_scope (die, objfile);
+ read_file_scope (die, cu);
break;
case DW_TAG_subprogram:
- read_subroutine_type (die, objfile);
- read_func_scope (die, objfile);
+ read_subroutine_type (die, cu);
+ read_func_scope (die, cu);
break;
case DW_TAG_inlined_subroutine:
/* FIXME: These are ignored for now.
- They could be used to set breakpoints on all inlined instances
- of a function and make GDB `next' properly over inlined functions. */
+ They could be used to set breakpoints on all inlined instances
+ of a function and make GDB `next' properly over inlined functions. */
break;
case DW_TAG_lexical_block:
- read_lexical_block_scope (die, objfile);
+ case DW_TAG_try_block:
+ case DW_TAG_catch_block:
+ read_lexical_block_scope (die, cu);
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
- read_structure_scope (die, objfile);
+ read_structure_type (die, cu);
+ process_structure_scope (die, cu);
break;
case DW_TAG_enumeration_type:
- read_enumeration (die, objfile);
+ read_enumeration_type (die, cu);
+ process_enumeration_scope (die, cu);
break;
+
+ /* FIXME drow/2004-03-14: These initialize die->type, but do not create
+ a symbol or process any children. Therefore it doesn't do anything
+ that won't be done on-demand by read_type_die. */
case DW_TAG_subroutine_type:
- read_subroutine_type (die, objfile);
+ read_subroutine_type (die, cu);
break;
case DW_TAG_array_type:
- read_array_type (die, objfile);
+ read_array_type (die, cu);
break;
case DW_TAG_pointer_type:
- read_tag_pointer_type (die, objfile);
+ read_tag_pointer_type (die, cu);
break;
case DW_TAG_ptr_to_member_type:
- read_tag_ptr_to_member_type (die, objfile);
+ read_tag_ptr_to_member_type (die, cu);
break;
case DW_TAG_reference_type:
- read_tag_reference_type (die, objfile);
+ read_tag_reference_type (die, cu);
break;
case DW_TAG_string_type:
- read_tag_string_type (die, objfile);
+ read_tag_string_type (die, cu);
break;
+ /* END FIXME */
+
case DW_TAG_base_type:
- read_base_type (die, objfile);
- if (dwarf_attr (die, DW_AT_name))
- {
- /* Add a typedef symbol for the base type definition. */
- new_symbol (die, die->type, objfile);
- }
+ read_base_type (die, cu);
+ /* Add a typedef symbol for the type definition, if it has a
+ DW_AT_name. */
+ new_symbol (die, die->type, cu);
+ break;
+ case DW_TAG_subrange_type:
+ read_subrange_type (die, cu);
+ /* Add a typedef symbol for the type definition, if it has a
+ DW_AT_name. */
+ new_symbol (die, die->type, cu);
break;
case DW_TAG_common_block:
- read_common_block (die, objfile);
+ read_common_block (die, cu);
break;
case DW_TAG_common_inclusion:
break;
+ case DW_TAG_namespace:
+ processing_has_namespace_info = 1;
+ read_namespace (die, cu);
+ break;
+ case DW_TAG_imported_declaration:
+ case DW_TAG_imported_module:
+ /* FIXME: carlton/2002-10-16: Eventually, we should use the
+ information contained in these. DW_TAG_imported_declaration
+ dies shouldn't have children; DW_TAG_imported_module dies
+ shouldn't in the C++ case, but conceivably could in the
+ Fortran case, so we'll have to replace this gdb_assert if
+ Fortran compilers start generating that info. */
+ processing_has_namespace_info = 1;
+ gdb_assert (die->child == NULL);
+ break;
default:
- new_symbol (die, NULL, objfile);
+ new_symbol (die, NULL, cu);
break;
}
}
static void
-read_file_scope (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+initialize_cu_func_list (struct dwarf2_cu *cu)
+{
+ cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
+}
+
+static void
+read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int line_offset = 0;
- CORE_ADDR lowpc = ((CORE_ADDR) -1);
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ CORE_ADDR lowpc = ((CORE_ADDR) -1);
CORE_ADDR highpc = ((CORE_ADDR) 0);
struct attribute *attr;
char *name = "<unknown>";
char *comp_dir = NULL;
struct die_info *child_die;
bfd *abfd = objfile->obfd;
+ struct line_header *line_header = 0;
+ CORE_ADDR baseaddr;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
- {
- if (die->has_children)
- {
- child_die = die->next;
- while (child_die && child_die->tag)
- {
- if (child_die->tag == DW_TAG_subprogram)
- {
- CORE_ADDR low, high;
-
- if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
- {
- lowpc = min (lowpc, low);
- highpc = max (highpc, high);
- }
- }
- child_die = sibling_die (child_die);
- }
- }
- }
+ get_scope_pc_bounds (die, &lowpc, &highpc, cu);
/* If we didn't find a lowpc, set it to highpc to avoid complaints
from finish_block. */
lowpc += baseaddr;
highpc += baseaddr;
- attr = dwarf_attr (die, DW_AT_name);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr)
{
name = DW_STRING (attr);
}
- attr = dwarf_attr (die, DW_AT_comp_dir);
+ attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
if (attr)
{
comp_dir = DW_STRING (attr);
}
}
- if (objfile->ei.entry_point >= lowpc &&
- objfile->ei.entry_point < highpc)
- {
- objfile->ei.entry_file_lowpc = lowpc;
- objfile->ei.entry_file_highpc = highpc;
- }
-
- attr = dwarf_attr (die, DW_AT_language);
+ attr = dwarf2_attr (die, DW_AT_language, cu);
if (attr)
{
- set_cu_language (DW_UNSND (attr));
+ set_cu_language (DW_UNSND (attr), cu);
}
+ /* We assume that we're processing GCC output. */
+ processing_gcc_compilation = 2;
#if 0
- /* FIXME:Do something here. */
- if (dip->at_producer != NULL)
+ /* FIXME:Do something here. */
+ if (dip->at_producer != NULL)
{
handle_producer (dip->at_producer);
}
/* The compilation unit may be in a different language or objfile,
zero out all remembered fundamental types. */
- memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
+ memset (cu->ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
start_symtab (name, comp_dir, lowpc);
record_debugformat ("DWARF 2");
- /* Decode line number information if present. */
- attr = dwarf_attr (die, DW_AT_stmt_list);
- if (attr)
- {
- line_offset = DW_UNSND (attr);
- dwarf_decode_lines (line_offset, comp_dir, abfd);
- }
+ initialize_cu_func_list (cu);
/* Process all dies in compilation unit. */
- if (die->has_children)
+ if (die->child != NULL)
{
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
- process_die (child_die, objfile);
+ process_die (child_die, cu);
child_die = sibling_die (child_die);
}
}
+
+ /* Decode line number information if present. */
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+ if (attr)
+ {
+ unsigned int line_offset = DW_UNSND (attr);
+ line_header = dwarf_decode_line_header (line_offset, abfd, cu);
+ if (line_header)
+ {
+ make_cleanup ((make_cleanup_ftype *) free_line_header,
+ (void *) line_header);
+ dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
+ }
+ }
+
+ /* Decode macro information, if present. Dwarf 2 macro information
+ refers to information in the line number info statement program
+ header, so we can only read it if we've read the header
+ successfully. */
+ attr = dwarf2_attr (die, DW_AT_macro_info, cu);
+ if (attr && line_header)
+ {
+ unsigned int macro_offset = DW_UNSND (attr);
+ dwarf_decode_macros (line_header, macro_offset,
+ comp_dir, abfd, cu);
+ }
+ do_cleanups (back_to);
+}
+
+static void
+add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
+ struct dwarf2_cu *cu)
+{
+ struct function_range *thisfn;
+
+ thisfn = (struct function_range *)
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
+ thisfn->name = name;
+ thisfn->lowpc = lowpc;
+ thisfn->highpc = highpc;
+ thisfn->seen_line = 0;
+ thisfn->next = NULL;
+
+ if (cu->last_fn == NULL)
+ cu->first_fn = thisfn;
+ else
+ cu->last_fn->next = thisfn;
+
+ cu->last_fn = thisfn;
}
static void
-read_func_scope (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- register struct context_stack *new;
+ struct objfile *objfile = cu->objfile;
+ struct context_stack *new;
CORE_ADDR lowpc;
CORE_ADDR highpc;
struct die_info *child_die;
struct attribute *attr;
char *name;
+ const char *previous_prefix = processing_current_prefix;
+ struct cleanup *back_to = NULL;
+ CORE_ADDR baseaddr;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- name = dwarf2_linkage_name (die);
+ name = dwarf2_linkage_name (die, cu);
/* Ignore functions with missing or empty names and functions with
missing or invalid low and high pc attributes. */
- if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
+ if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
return;
+ if (cu->language == language_cplus)
+ {
+ struct die_info *spec_die = die_specification (die, cu);
+
+ /* NOTE: carlton/2004-01-23: We have to be careful in the
+ presence of DW_AT_specification. For example, with GCC 3.4,
+ given the code
+
+ namespace N {
+ void foo() {
+ // Definition of N::foo.
+ }
+ }
+
+ then we'll have a tree of DIEs like this:
+
+ 1: DW_TAG_compile_unit
+ 2: DW_TAG_namespace // N
+ 3: DW_TAG_subprogram // declaration of N::foo
+ 4: DW_TAG_subprogram // definition of N::foo
+ DW_AT_specification // refers to die #3
+
+ Thus, when processing die #4, we have to pretend that we're
+ in the context of its DW_AT_specification, namely the contex
+ of die #3. */
+
+ if (spec_die != NULL)
+ {
+ char *specification_prefix = determine_prefix (spec_die, cu);
+ processing_current_prefix = specification_prefix;
+ back_to = make_cleanup (xfree, specification_prefix);
+ }
+ }
+
lowpc += baseaddr;
highpc += baseaddr;
+ /* Record the function range for dwarf_decode_lines. */
+ add_to_cu_func_list (name, lowpc, highpc, cu);
+
if (objfile->ei.entry_point >= lowpc &&
objfile->ei.entry_point < highpc)
{
objfile->ei.entry_func_highpc = highpc;
}
- if (STREQ (name, "main")) /* FIXME: hardwired name */
- {
- objfile->ei.main_func_lowpc = lowpc;
- objfile->ei.main_func_highpc = highpc;
- }
-
- /* Decode DW_AT_frame_base location descriptor if present, keep result
- for DW_OP_fbreg operands in decode_locdesc. */
- frame_base_reg = -1;
- frame_base_offset = 0;
- attr = dwarf_attr (die, DW_AT_frame_base);
- if (attr)
- {
- CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile);
- if (isreg)
- frame_base_reg = addr;
- else if (offreg)
- {
- frame_base_reg = basereg;
- frame_base_offset = addr;
- }
- else
- complain (&dwarf2_unsupported_at_frame_base, name);
- }
-
new = push_context (0, lowpc);
- new->name = new_symbol (die, die->type, objfile);
- list_in_scope = &local_symbols;
+ new->name = new_symbol (die, die->type, cu);
- if (die->has_children)
- {
- child_die = die->next;
+ /* If there is a location expression for DW_AT_frame_base, record
+ it. */
+ attr = dwarf2_attr (die, DW_AT_frame_base, cu);
+ if (attr)
+ /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
+ expression is being recorded directly in the function's symbol
+ and not in a separate frame-base object. I guess this hack is
+ to avoid adding some sort of frame-base adjunct/annex to the
+ function's symbol :-(. The problem with doing this is that it
+ results in a function symbol with a location expression that
+ has nothing to do with the location of the function, ouch! The
+ relationship should be: a function's symbol has-a frame base; a
+ frame-base has-a location expression. */
+ dwarf2_symbol_mark_computed (attr, new->name, cu);
+
+ cu->list_in_scope = &local_symbols;
+
+ if (die->child != NULL)
+ {
+ child_die = die->child;
while (child_die && child_die->tag)
{
- process_die (child_die, objfile);
+ process_die (child_die, cu);
child_die = sibling_die (child_die);
}
}
/* Make a block for the local symbols within. */
finish_block (new->name, &local_symbols, new->old_blocks,
lowpc, highpc, objfile);
- list_in_scope = &file_symbols;
+
+ /* In C++, we can have functions nested inside functions (e.g., when
+ a function declares a class that has methods). This means that
+ when we finish processing a function scope, we may need to go
+ back to building a containing block's symbol lists. */
+ local_symbols = new->locals;
+ param_symbols = new->params;
+
+ /* If we've finished processing a top-level function, subsequent
+ symbols go in the file symbol list. */
+ if (outermost_context_p ())
+ cu->list_in_scope = &file_symbols;
+
+ processing_current_prefix = previous_prefix;
+ if (back_to != NULL)
+ do_cleanups (back_to);
}
/* Process all the DIES contained within a lexical block scope. Start
a new scope, process the dies, and then close the scope. */
static void
-read_lexical_block_scope (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- register struct context_stack *new;
+ struct objfile *objfile = cu->objfile;
+ struct context_stack *new;
CORE_ADDR lowpc, highpc;
struct die_info *child_die;
+ CORE_ADDR baseaddr;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
/* Ignore blocks with missing or invalid low and high pc attributes. */
- if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
+ /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
+ as multiple lexical blocks? Handling children in a sane way would
+ be nasty. Might be easier to properly extend generic blocks to
+ describe ranges. */
+ if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
return;
lowpc += baseaddr;
highpc += baseaddr;
push_context (0, lowpc);
- if (die->has_children)
+ if (die->child != NULL)
{
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
- process_die (child_die, objfile);
+ process_die (child_die, cu);
child_die = sibling_die (child_die);
}
}
local_symbols = new->locals;
}
-/* Get low and high pc attributes from a die.
- Return 1 if the attributes are present and valid, otherwise, return 0. */
-
+/* Get low and high pc attributes from a die. Return 1 if the attributes
+ are present and valid, otherwise, return 0. Return -1 if the range is
+ discontinuous, i.e. derived from DW_AT_ranges information. */
static int
-dwarf2_get_pc_bounds (die, lowpc, highpc, objfile)
- struct die_info *die;
- CORE_ADDR *lowpc;
- CORE_ADDR *highpc;
- struct objfile *objfile;
+dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
struct attribute *attr;
- CORE_ADDR low;
- CORE_ADDR high;
+ bfd *obfd = objfile->obfd;
+ CORE_ADDR low = 0;
+ CORE_ADDR high = 0;
+ int ret = 0;
- attr = dwarf_attr (die, DW_AT_low_pc);
- if (attr)
- low = DW_ADDR (attr);
- else
- return 0;
- attr = dwarf_attr (die, DW_AT_high_pc);
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
if (attr)
- high = DW_ADDR (attr);
+ {
+ high = DW_ADDR (attr);
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ low = DW_ADDR (attr);
+ else
+ /* Found high w/o low attribute. */
+ return 0;
+
+ /* Found consecutive range of addresses. */
+ ret = 1;
+ }
else
- return 0;
+ {
+ attr = dwarf2_attr (die, DW_AT_ranges, cu);
+ if (attr != NULL)
+ {
+ unsigned int addr_size = cu_header->addr_size;
+ CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
+ /* Value of the DW_AT_ranges attribute is the offset in the
+ .debug_ranges section. */
+ unsigned int offset = DW_UNSND (attr);
+ /* Base address selection entry. */
+ CORE_ADDR base;
+ int found_base;
+ int dummy;
+ char *buffer;
+ CORE_ADDR marker;
+ int low_set;
+
+ found_base = cu_header->base_known;
+ base = cu_header->base_address;
+
+ if (offset >= dwarf2_per_objfile->ranges_size)
+ {
+ complaint (&symfile_complaints,
+ "Offset %d out of bounds for DW_AT_ranges attribute",
+ offset);
+ return 0;
+ }
+ buffer = dwarf2_per_objfile->ranges_buffer + offset;
+
+ /* Read in the largest possible address. */
+ marker = read_address (obfd, buffer, cu, &dummy);
+ if ((marker & mask) == mask)
+ {
+ /* If we found the largest possible address, then
+ read the base address. */
+ base = read_address (obfd, buffer + addr_size, cu, &dummy);
+ buffer += 2 * addr_size;
+ offset += 2 * addr_size;
+ found_base = 1;
+ }
+
+ low_set = 0;
+
+ while (1)
+ {
+ CORE_ADDR range_beginning, range_end;
+
+ range_beginning = read_address (obfd, buffer, cu, &dummy);
+ buffer += addr_size;
+ range_end = read_address (obfd, buffer, cu, &dummy);
+ buffer += addr_size;
+ offset += 2 * addr_size;
+
+ /* An end of list marker is a pair of zero addresses. */
+ if (range_beginning == 0 && range_end == 0)
+ /* Found the end of list entry. */
+ break;
+
+ /* Each base address selection entry is a pair of 2 values.
+ The first is the largest possible address, the second is
+ the base address. Check for a base address here. */
+ if ((range_beginning & mask) == mask)
+ {
+ /* If we found the largest possible address, then
+ read the base address. */
+ base = read_address (obfd, buffer + addr_size, cu, &dummy);
+ found_base = 1;
+ continue;
+ }
+
+ if (!found_base)
+ {
+ /* We have no valid base address for the ranges
+ data. */
+ complaint (&symfile_complaints,
+ "Invalid .debug_ranges data (no base address)");
+ return 0;
+ }
+
+ range_beginning += base;
+ range_end += base;
+
+ /* FIXME: This is recording everything as a low-high
+ segment of consecutive addresses. We should have a
+ data structure for discontiguous block ranges
+ instead. */
+ if (! low_set)
+ {
+ low = range_beginning;
+ high = range_end;
+ low_set = 1;
+ }
+ else
+ {
+ if (range_beginning < low)
+ low = range_beginning;
+ if (range_end > high)
+ high = range_end;
+ }
+ }
+
+ if (! low_set)
+ /* If the first entry is an end-of-list marker, the range
+ describes an empty scope, i.e. no instructions. */
+ return 0;
+
+ ret = -1;
+ }
+ }
if (high < low)
return 0;
labels are not in the output, so the relocs get a value of 0.
If this is a discarded function, mark the pc bounds as invalid,
so that GDB will ignore it. */
- if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0)
+ if (low == 0 && (bfd_get_file_flags (obfd) & HAS_RELOC) == 0)
return 0;
*lowpc = low;
*highpc = high;
- return 1;
+ return ret;
}
-/* Add an aggregate field to the field list. */
+/* Get the low and high pc's represented by the scope DIE, and store
+ them in *LOWPC and *HIGHPC. If the correct values can't be
+ determined, set *LOWPC to -1 and *HIGHPC to 0. */
static void
-dwarf2_add_field (fip, die, objfile)
- struct field_info *fip;
- struct die_info *die;
- struct objfile *objfile;
+get_scope_pc_bounds (struct die_info *die,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
{
+ CORE_ADDR best_low = (CORE_ADDR) -1;
+ CORE_ADDR best_high = (CORE_ADDR) 0;
+ CORE_ADDR current_low, current_high;
+
+ if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu))
+ {
+ best_low = current_low;
+ best_high = current_high;
+ }
+ else
+ {
+ struct die_info *child = die->child;
+
+ while (child && child->tag)
+ {
+ switch (child->tag) {
+ case DW_TAG_subprogram:
+ if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu))
+ {
+ best_low = min (best_low, current_low);
+ best_high = max (best_high, current_high);
+ }
+ break;
+ case DW_TAG_namespace:
+ /* FIXME: carlton/2004-01-16: Should we do this for
+ DW_TAG_class_type/DW_TAG_structure_type, too? I think
+ that current GCC's always emit the DIEs corresponding
+ to definitions of methods of classes as children of a
+ DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
+ the DIEs giving the declarations, which could be
+ anywhere). But I don't see any reason why the
+ standards says that they have to be there. */
+ get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
+
+ if (current_low != ((CORE_ADDR) -1))
+ {
+ best_low = min (best_low, current_low);
+ best_high = max (best_high, current_high);
+ }
+ break;
+ default:
+ /* Ignore. */
+ break;
+ }
+
+ child = sibling_die (child);
+ }
+ }
+
+ *lowpc = best_low;
+ *highpc = best_high;
+}
+
+/* Add an aggregate field to the field list. */
+
+static void
+dwarf2_add_field (struct field_info *fip, struct die_info *die,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
struct nextfield *new_field;
struct attribute *attr;
struct field *fp;
/* Allocate a new field list entry and link it in. */
new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
- make_cleanup (free, new_field);
+ make_cleanup (xfree, new_field);
memset (new_field, 0, sizeof (struct nextfield));
new_field->next = fip->fields;
fip->fields = new_field;
new_field->accessibility = DW_ACCESS_private;
new_field->virtuality = DW_VIRTUALITY_none;
- attr = dwarf_attr (die, DW_AT_accessibility);
+ attr = dwarf2_attr (die, DW_AT_accessibility, cu);
if (attr)
new_field->accessibility = DW_UNSND (attr);
if (new_field->accessibility != DW_ACCESS_public)
fip->non_public_fields = 1;
- attr = dwarf_attr (die, DW_AT_virtuality);
+ attr = dwarf2_attr (die, DW_AT_virtuality, cu);
if (attr)
new_field->virtuality = DW_UNSND (attr);
fp = &new_field->field;
- if (die->tag == DW_TAG_member)
+
+ if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
{
+ /* Data member other than a C++ static data member. */
+
/* Get type of field. */
- fp->type = die_type (die, objfile);
+ fp->type = die_type (die, cu);
+
+ FIELD_STATIC_KIND (*fp) = 0;
/* Get bit size of field (zero if none). */
- attr = dwarf_attr (die, DW_AT_bit_size);
+ attr = dwarf2_attr (die, DW_AT_bit_size, cu);
if (attr)
{
FIELD_BITSIZE (*fp) = DW_UNSND (attr);
}
/* Get bit offset of field. */
- attr = dwarf_attr (die, DW_AT_data_member_location);
+ attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
if (attr)
{
FIELD_BITPOS (*fp) =
- decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
+ decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte;
}
else
FIELD_BITPOS (*fp) = 0;
- attr = dwarf_attr (die, DW_AT_bit_offset);
+ attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
if (attr)
{
if (BITS_BIG_ENDIAN)
{
/* For big endian bits, the DW_AT_bit_offset gives the
- additional bit offset from the MSB of the containing
- anonymous object to the MSB of the field. We don't
- have to do anything special since we don't need to
- know the size of the anonymous object. */
+ additional bit offset from the MSB of the containing
+ anonymous object to the MSB of the field. We don't
+ have to do anything special since we don't need to
+ know the size of the anonymous object. */
FIELD_BITPOS (*fp) += DW_UNSND (attr);
}
else
{
/* For little endian bits, compute the bit offset to the
- MSB of the anonymous object, subtract off the number of
- bits from the MSB of the field to the MSB of the
- object, and then subtract off the number of bits of
- the field itself. The result is the bit offset of
- the LSB of the field. */
+ MSB of the anonymous object, subtract off the number of
+ bits from the MSB of the field to the MSB of the
+ object, and then subtract off the number of bits of
+ the field itself. The result is the bit offset of
+ the LSB of the field. */
int anonymous_size;
int bit_offset = DW_UNSND (attr);
- attr = dwarf_attr (die, DW_AT_byte_size);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
/* The size of the anonymous object containing
}
/* Get name of field. */
- attr = dwarf_attr (die, DW_AT_name);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
fieldname = DW_STRING (attr);
- fp->name = obsavestring (fieldname, strlen (fieldname),
- &objfile->type_obstack);
+
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ fp->name = fieldname;
/* Change accessibility for artificial fields (e.g. virtual table
- pointer or virtual base class pointer) to private. */
- if (dwarf_attr (die, DW_AT_artificial))
+ pointer or virtual base class pointer) to private. */
+ if (dwarf2_attr (die, DW_AT_artificial, cu))
{
new_field->accessibility = DW_ACCESS_private;
fip->non_public_fields = 1;
}
}
- else if (die->tag == DW_TAG_variable)
+ else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
{
+ /* C++ static member. */
+
+ /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
+ is a declaration, but all versions of G++ as of this writing
+ (so through at least 3.2.1) incorrectly generate
+ DW_TAG_variable tags. */
+
char *physname;
- char *cp;
- /* C++ static member.
- Get physical name, extract field name from physical name. */
- physname = dwarf2_linkage_name (die);
- if (physname == NULL)
+ /* Get name of field. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr && DW_STRING (attr))
+ fieldname = DW_STRING (attr);
+ else
return;
- cp = physname;
- while (*cp && !is_cplus_marker (*cp))
- cp++;
- if (*cp)
- fieldname = cp + 1;
- if (*fieldname == '\0')
- {
- complain (&dwarf2_bad_static_member_name, physname);
- }
+ /* Get physical name. */
+ physname = dwarf2_linkage_name (die, cu);
- SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
- &objfile->type_obstack));
- FIELD_TYPE (*fp) = die_type (die, objfile);
- FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
- &objfile->type_obstack);
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
+ FIELD_TYPE (*fp) = die_type (die, cu);
+ FIELD_NAME (*fp) = fieldname;
}
else if (die->tag == DW_TAG_inheritance)
{
/* C++ base class field. */
- attr = dwarf_attr (die, DW_AT_data_member_location);
+ attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
if (attr)
- FIELD_BITPOS (*fp) = decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
+ FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu)
+ * bits_per_byte);
FIELD_BITSIZE (*fp) = 0;
- FIELD_TYPE (*fp) = die_type (die, objfile);
+ FIELD_STATIC_KIND (*fp) = 0;
+ FIELD_TYPE (*fp) = die_type (die, cu);
FIELD_NAME (*fp) = type_name_no_tag (fp->type);
fip->nbaseclasses++;
}
/* Create the vector of fields, and attach it to the type. */
static void
-dwarf2_attach_fields_to_type (fip, type, objfile)
- struct field_info *fip;
- struct type *type;
- struct objfile *objfile;
+dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
+ struct dwarf2_cu *cu)
{
int nfields = fip->nfields;
TYPE_FIELD (type, nfields) = fip->fields->field;
switch (fip->fields->accessibility)
{
- case DW_ACCESS_private:
- SET_TYPE_FIELD_PRIVATE (type, nfields);
- break;
+ case DW_ACCESS_private:
+ SET_TYPE_FIELD_PRIVATE (type, nfields);
+ break;
- case DW_ACCESS_protected:
- SET_TYPE_FIELD_PROTECTED (type, nfields);
- break;
+ case DW_ACCESS_protected:
+ SET_TYPE_FIELD_PROTECTED (type, nfields);
+ break;
- case DW_ACCESS_public:
- break;
+ case DW_ACCESS_public:
+ break;
- default:
- /* Unknown accessibility. Complain and treat it as public. */
- {
- complain (&dwarf2_unsupported_accessibility,
- fip->fields->accessibility);
- }
- break;
+ default:
+ /* Unknown accessibility. Complain and treat it as public. */
+ {
+ complaint (&symfile_complaints, "unsupported accessibility %d",
+ fip->fields->accessibility);
+ }
+ break;
}
if (nfields < fip->nbaseclasses)
{
switch (fip->fields->virtuality)
{
- case DW_VIRTUALITY_virtual:
- case DW_VIRTUALITY_pure_virtual:
- SET_TYPE_FIELD_VIRTUAL (type, nfields);
- break;
+ case DW_VIRTUALITY_virtual:
+ case DW_VIRTUALITY_pure_virtual:
+ SET_TYPE_FIELD_VIRTUAL (type, nfields);
+ break;
}
}
fip->fields = fip->fields->next;
}
}
-/* Skip to the end of a member function name in a mangled name. */
-
-static char *
-skip_member_fn_name (physname)
- char *physname;
-{
- char *endname = physname;
-
- /* Skip over leading underscores. */
- while (*endname == '_')
- endname++;
-
- /* Find two succesive underscores. */
- do
- endname = strchr (endname, '_');
- while (endname != NULL && *++endname != '_');
-
- if (endname == NULL)
- {
- complain (&dwarf2_bad_member_name_complaint, physname);
- endname = physname;
- }
- else
- {
- /* Take care of trailing underscores. */
- if (endname[1] != '_')
- endname--;
- }
- return endname;
-}
-
/* Add a member function to the proper fieldlist. */
static void
-dwarf2_add_member_fn (fip, die, type, objfile)
- struct field_info *fip;
- struct die_info *die;
- struct type *type;
- struct objfile *objfile;
+dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
+ struct type *type, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct attribute *attr;
struct fnfieldlist *flp;
int i;
char *physname;
struct nextfnfield *new_fnfield;
- /* Extract member function name from mangled name. */
- physname = dwarf2_linkage_name (die);
- if (physname == NULL)
- return;
- if ((physname[0] == '_' && physname[1] == '_'
- && strchr ("0123456789Qt", physname[2]))
- || DESTRUCTOR_PREFIX_P (physname))
- {
- /* Constructor and destructor field names are set to the name
- of the class, but without template parameter lists.
- The name might be missing for anonymous aggregates. */
- if (TYPE_TAG_NAME (type))
- {
- char *p = strchr (TYPE_TAG_NAME (type), '<');
-
- if (p == NULL)
- fieldname = TYPE_TAG_NAME (type);
- else
- fieldname = obsavestring (TYPE_TAG_NAME (type),
- p - TYPE_TAG_NAME (type),
- &objfile->type_obstack);
- }
- else
- {
- char *anon_name = "";
- fieldname = obsavestring (anon_name, strlen (anon_name),
- &objfile->type_obstack);
- }
- }
+ /* Get name of member function. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr && DW_STRING (attr))
+ fieldname = DW_STRING (attr);
else
- {
- char *endname = skip_member_fn_name (physname);
+ return;
- /* Ignore member function if we were unable not extract the member
- function name. */
- if (endname == physname)
- return;
- fieldname = obsavestring (physname, endname - physname,
- &objfile->type_obstack);
- }
+ /* Get the mangled name. */
+ physname = dwarf2_linkage_name (die, cu);
/* Look up member function name in fieldlist. */
for (i = 0; i < fip->nfnfields; i++)
{
- if (STREQ (fip->fnfieldlists[i].name, fieldname))
+ if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
break;
}
fip->fnfieldlists = (struct fnfieldlist *)
xrealloc (fip->fnfieldlists,
(fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct fnfieldlist));
+ * sizeof (struct fnfieldlist));
if (fip->nfnfields == 0)
make_cleanup (free_current_contents, &fip->fnfieldlists);
}
/* Create a new member function field and chain it to the field list
entry. */
new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
- make_cleanup (free, new_fnfield);
+ make_cleanup (xfree, new_fnfield);
memset (new_fnfield, 0, sizeof (struct nextfnfield));
new_fnfield->next = flp->head;
flp->head = new_fnfield;
/* Fill in the member function field info. */
fnp = &new_fnfield->fnfield;
- fnp->physname = obsavestring (physname, strlen (physname),
- &objfile->type_obstack);
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ fnp->physname = physname ? physname : "";
fnp->type = alloc_type (objfile);
if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
{
- struct type *return_type = TYPE_TARGET_TYPE (die->type);
- struct type **arg_types;
int nparams = TYPE_NFIELDS (die->type);
- int iparams;
- /* Copy argument types from the subroutine type. */
- arg_types = (struct type **)
- TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *));
- for (iparams = 0; iparams < nparams; iparams++)
- arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams);
-
- /* Set last entry in argument type vector. */
- if (TYPE_FLAGS (die->type) & TYPE_FLAG_VARARGS)
- arg_types[nparams] = NULL;
- else
- arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID);
-
- smash_to_method_type (fnp->type, type, return_type, arg_types);
+ /* TYPE is the domain of this method, and DIE->TYPE is the type
+ of the method itself (TYPE_CODE_METHOD). */
+ smash_to_method_type (fnp->type, type,
+ TYPE_TARGET_TYPE (die->type),
+ TYPE_FIELDS (die->type),
+ TYPE_NFIELDS (die->type),
+ TYPE_VARARGS (die->type));
/* Handle static member functions.
- Dwarf2 has no clean way to discern C++ static and non-static
- member functions. G++ helps GDB by marking the first
- parameter for non-static member functions (which is the
- this pointer) as artificial. We obtain this information
- from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
+ Dwarf2 has no clean way to discern C++ static and non-static
+ member functions. G++ helps GDB by marking the first
+ parameter for non-static member functions (which is the
+ this pointer) as artificial. We obtain this information
+ from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
fnp->voffset = VOFFSET_STATIC;
}
else
- complain (&dwarf2_missing_member_fn_type_complaint, physname);
+ complaint (&symfile_complaints, "member function type missing for '%s'",
+ physname);
/* Get fcontext from DW_AT_containing_type if present. */
- if (dwarf_attr (die, DW_AT_containing_type) != NULL)
- fnp->fcontext = die_containing_type (die, objfile);
+ if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
+ fnp->fcontext = die_containing_type (die, cu);
/* dwarf2 doesn't have stubbed physical names, so the setting of is_const
and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
/* Get accessibility. */
- attr = dwarf_attr (die, DW_AT_accessibility);
+ attr = dwarf2_attr (die, DW_AT_accessibility, cu);
if (attr)
{
switch (DW_UNSND (attr))
{
- case DW_ACCESS_private:
- fnp->is_private = 1;
- break;
- case DW_ACCESS_protected:
- fnp->is_protected = 1;
- break;
+ case DW_ACCESS_private:
+ fnp->is_private = 1;
+ break;
+ case DW_ACCESS_protected:
+ fnp->is_protected = 1;
+ break;
}
}
+ /* Check for artificial methods. */
+ attr = dwarf2_attr (die, DW_AT_artificial, cu);
+ if (attr && DW_UNSND (attr) != 0)
+ fnp->is_artificial = 1;
+
/* Get index in virtual function table if it is a virtual member function. */
- attr = dwarf_attr (die, DW_AT_vtable_elem_location);
+ attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
if (attr)
- fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile) + 2;
+ {
+ /* Support the .debug_loc offsets */
+ if (attr_form_is_block (attr))
+ {
+ fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
+ }
+ else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
+ fieldname);
+ }
+ }
}
/* Create the vector of member function fields, and attach it to the type. */
static void
-dwarf2_attach_fn_fields_to_type (fip, type, objfile)
- struct field_info *fip;
- struct type *type;
- struct objfile *objfile;
+dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
+ struct dwarf2_cu *cu)
{
struct fnfieldlist *flp;
int total_length = 0;
fn_flp->fn_fields = (struct fn_field *)
TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
for (k = flp->length; (k--, nfp); nfp = nfp->next)
- fn_flp->fn_fields[k] = nfp->fnfield;
+ fn_flp->fn_fields[k] = nfp->fnfield;
total_length += flp->length;
}
suppresses creating a symbol table entry itself). */
static void
-read_structure_scope (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct type *type;
struct attribute *attr;
+ const char *previous_prefix = processing_current_prefix;
+ struct cleanup *back_to = NULL;
+
+ if (die->type)
+ return;
type = alloc_type (objfile);
INIT_CPLUS_SPECIFIC (type);
- attr = dwarf_attr (die, DW_AT_name);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
{
- TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
- strlen (DW_STRING (attr)),
- &objfile->type_obstack);
+ if (cu->language == language_cplus)
+ {
+ char *new_prefix = determine_class_name (die, cu);
+ TYPE_TAG_NAME (type) = obsavestring (new_prefix,
+ strlen (new_prefix),
+ &objfile->objfile_obstack);
+ back_to = make_cleanup (xfree, new_prefix);
+ processing_current_prefix = new_prefix;
+ }
+ else
+ {
+ /* The name is already allocated along with this objfile, so
+ we don't need to duplicate it for the type. */
+ TYPE_TAG_NAME (type) = DW_STRING (attr);
+ }
}
if (die->tag == DW_TAG_structure_type)
else
{
/* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
- in gdbtypes.h. */
+ in gdbtypes.h. */
TYPE_CODE (type) = TYPE_CODE_CLASS;
}
- attr = dwarf_attr (die, DW_AT_byte_size);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
TYPE_LENGTH (type) = DW_UNSND (attr);
TYPE_LENGTH (type) = 0;
}
+ if (die_is_declaration (die, cu))
+ TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
+
/* We need to add the type field to the die immediately so we don't
infinitely recurse when dealing with pointers to the structure
type within the structure itself. */
die->type = type;
- if (die->has_children)
+ if (die->child != NULL && ! die_is_declaration (die, cu))
{
struct field_info fi;
struct die_info *child_die;
memset (&fi, 0, sizeof (struct field_info));
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
- if (child_die->tag == DW_TAG_member)
- {
- dwarf2_add_field (&fi, child_die, objfile);
- }
- else if (child_die->tag == DW_TAG_variable)
+ if (child_die->tag == DW_TAG_member
+ || child_die->tag == DW_TAG_variable)
{
- /* C++ static member. */
- dwarf2_add_field (&fi, child_die, objfile);
+ /* NOTE: carlton/2002-11-05: A C++ static data member
+ should be a DW_TAG_member that is a declaration, but
+ all versions of G++ as of this writing (so through at
+ least 3.2.1) incorrectly generate DW_TAG_variable
+ tags for them instead. */
+ dwarf2_add_field (&fi, child_die, cu);
}
else if (child_die->tag == DW_TAG_subprogram)
{
/* C++ member function. */
- process_die (child_die, objfile);
- dwarf2_add_member_fn (&fi, child_die, type, objfile);
+ read_type_die (child_die, cu);
+ dwarf2_add_member_fn (&fi, child_die, type, cu);
}
else if (child_die->tag == DW_TAG_inheritance)
{
/* C++ base class field. */
- dwarf2_add_field (&fi, child_die, objfile);
- }
- else
- {
- process_die (child_die, objfile);
+ dwarf2_add_field (&fi, child_die, cu);
}
child_die = sibling_die (child_die);
}
/* Attach fields and member functions to the type. */
if (fi.nfields)
- dwarf2_attach_fields_to_type (&fi, type, objfile);
+ dwarf2_attach_fields_to_type (&fi, type, cu);
if (fi.nfnfields)
{
- dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
+ dwarf2_attach_fn_fields_to_type (&fi, type, cu);
- /* Get the type which refers to the base class (possibly this
+ /* Get the type which refers to the base class (possibly this
class itself) which contains the vtable pointer for the current
class from the DW_AT_containing_type attribute. */
- if (dwarf_attr (die, DW_AT_containing_type) != NULL)
+ if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
{
- struct type *t = die_containing_type (die, objfile);
+ struct type *t = die_containing_type (die, cu);
TYPE_VPTR_BASETYPE (type) = t;
if (type == t)
{
- static const char vptr_name[] = { '_','v','p','t','r','\0' };
+ static const char vptr_name[] =
+ {'_', 'v', 'p', 't', 'r', '\0'};
int i;
/* Our own class provides vtbl ptr. */
{
char *fieldname = TYPE_FIELD_NAME (t, i);
- if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
+ if ((strncmp (fieldname, vptr_name,
+ strlen (vptr_name) - 1)
+ == 0)
&& is_cplus_marker (fieldname[strlen (vptr_name)]))
{
TYPE_VPTR_FIELDNO (type) = i;
/* Complain if virtual function table field not found. */
if (i < TYPE_N_BASECLASSES (t))
- complain (&dwarf2_vtbl_not_found_complaint,
- TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "");
+ complaint (&symfile_complaints,
+ "virtual function table pointer not found when defining class '%s'",
+ TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
+ "");
}
else
{
}
}
- new_symbol (die, type, objfile);
-
do_cleanups (back_to);
}
- else
- {
- /* No children, must be stub. */
- TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
- }
- die->type = type;
+ processing_current_prefix = previous_prefix;
+ if (back_to != NULL)
+ do_cleanups (back_to);
}
-/* Given a pointer to a die which begins an enumeration, process all
- the dies that define the members of the enumeration.
+static void
+process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ const char *previous_prefix = processing_current_prefix;
+ struct die_info *child_die = die->child;
- This will be much nicer in draft 6 of the DWARF spec when our
- members will be dies instead squished into the DW_AT_element_list
- attribute.
+ if (TYPE_TAG_NAME (die->type) != NULL)
+ processing_current_prefix = TYPE_TAG_NAME (die->type);
- NOTE: We reverse the order of the element list. */
+ /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
+ snapshots) has been known to create a die giving a declaration
+ for a class that has, as a child, a die giving a definition for a
+ nested class. So we have to process our children even if the
+ current die is a declaration. Normally, of course, a declaration
+ won't have any children at all. */
+
+ while (child_die != NULL && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_member
+ || child_die->tag == DW_TAG_variable
+ || child_die->tag == DW_TAG_inheritance)
+ {
+ /* Do nothing. */
+ }
+ else
+ process_die (child_die, cu);
+
+ child_die = sibling_die (child_die);
+ }
+
+ if (die->child != NULL && ! die_is_declaration (die, cu))
+ new_symbol (die, die->type, cu);
+
+ processing_current_prefix = previous_prefix;
+}
+
+/* Given a DW_AT_enumeration_type die, set its type. We do not
+ complete the type's fields yet, or create any symbols. */
static void
-read_enumeration (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct die_info *child_die;
+ struct objfile *objfile = cu->objfile;
struct type *type;
- struct field *fields;
struct attribute *attr;
- struct symbol *sym;
- int num_fields;
- int unsigned_enum = 1;
+
+ if (die->type)
+ return;
type = alloc_type (objfile);
TYPE_CODE (type) = TYPE_CODE_ENUM;
- attr = dwarf_attr (die, DW_AT_name);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
{
- TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
- strlen (DW_STRING (attr)),
- &objfile->type_obstack);
+ char *name = DW_STRING (attr);
+
+ if (processing_has_namespace_info)
+ {
+ TYPE_TAG_NAME (type) = obconcat (&objfile->objfile_obstack,
+ processing_current_prefix,
+ processing_current_prefix[0] == '\0'
+ ? "" : "::",
+ name);
+ }
+ else
+ {
+ /* The name is already allocated along with this objfile, so
+ we don't need to duplicate it for the type. */
+ TYPE_TAG_NAME (type) = name;
+ }
}
- attr = dwarf_attr (die, DW_AT_byte_size);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
TYPE_LENGTH (type) = DW_UNSND (attr);
TYPE_LENGTH (type) = 0;
}
+ die->type = type;
+}
+
+/* Determine the name of the type represented by DIE, which should be
+ a named C++ compound type. Return the name in question; the caller
+ is responsible for xfree()'ing it. */
+
+static char *
+determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct cleanup *back_to = NULL;
+ struct die_info *spec_die = die_specification (die, cu);
+ char *new_prefix = NULL;
+
+ /* If this is the definition of a class that is declared by another
+ die, then processing_current_prefix may not be accurate; see
+ read_func_scope for a similar example. */
+ if (spec_die != NULL)
+ {
+ char *specification_prefix = determine_prefix (spec_die, cu);
+ processing_current_prefix = specification_prefix;
+ back_to = make_cleanup (xfree, specification_prefix);
+ }
+
+ /* If we don't have namespace debug info, guess the name by trying
+ to demangle the names of members, just like we did in
+ guess_structure_name. */
+ if (!processing_has_namespace_info)
+ {
+ struct die_info *child;
+
+ for (child = die->child;
+ child != NULL && child->tag != 0;
+ child = sibling_die (child))
+ {
+ if (child->tag == DW_TAG_subprogram)
+ {
+ new_prefix = class_name_from_physname (dwarf2_linkage_name
+ (child, cu));
+
+ if (new_prefix != NULL)
+ break;
+ }
+ }
+ }
+
+ if (new_prefix == NULL)
+ {
+ const char *name = dwarf2_name (die, cu);
+ new_prefix = typename_concat (processing_current_prefix,
+ name ? name : "<<anonymous>>");
+ }
+
+ if (back_to != NULL)
+ do_cleanups (back_to);
+
+ return new_prefix;
+}
+
+/* Given a pointer to a die which begins an enumeration, process all
+ the dies that define the members of the enumeration, and create the
+ symbol for the enumeration type.
+
+ NOTE: We reverse the order of the element list. */
+
+static void
+process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct die_info *child_die;
+ struct field *fields;
+ struct attribute *attr;
+ struct symbol *sym;
+ int num_fields;
+ int unsigned_enum = 1;
+
num_fields = 0;
fields = NULL;
- if (die->has_children)
+ if (die->child != NULL)
{
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
if (child_die->tag != DW_TAG_enumerator)
{
- process_die (child_die, objfile);
+ process_die (child_die, cu);
}
else
{
- attr = dwarf_attr (child_die, DW_AT_name);
+ attr = dwarf2_attr (child_die, DW_AT_name, cu);
if (attr)
{
- sym = new_symbol (child_die, type, objfile);
+ sym = new_symbol (child_die, die->type, cu);
if (SYMBOL_VALUE (sym) < 0)
unsigned_enum = 0;
fields = (struct field *)
xrealloc (fields,
(num_fields + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct field));
+ * sizeof (struct field));
}
- FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym);
+ FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
FIELD_TYPE (fields[num_fields]) = NULL;
FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
FIELD_BITSIZE (fields[num_fields]) = 0;
+ FIELD_STATIC_KIND (fields[num_fields]) = 0;
num_fields++;
}
if (num_fields)
{
- TYPE_NFIELDS (type) = num_fields;
- TYPE_FIELDS (type) = (struct field *)
- TYPE_ALLOC (type, sizeof (struct field) * num_fields);
- memcpy (TYPE_FIELDS (type), fields,
+ TYPE_NFIELDS (die->type) = num_fields;
+ TYPE_FIELDS (die->type) = (struct field *)
+ TYPE_ALLOC (die->type, sizeof (struct field) * num_fields);
+ memcpy (TYPE_FIELDS (die->type), fields,
sizeof (struct field) * num_fields);
- free (fields);
+ xfree (fields);
}
if (unsigned_enum)
- TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+ TYPE_FLAGS (die->type) |= TYPE_FLAG_UNSIGNED;
}
- die->type = type;
- new_symbol (die, type, objfile);
+
+ new_symbol (die, die->type, cu);
}
/* Extract all information from a DW_TAG_array_type DIE and put it in
arrays. */
static void
-read_array_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_array_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct die_info *child_die;
struct type *type = NULL;
struct type *element_type, *range_type, *index_type;
return;
}
- element_type = die_type (die, objfile);
+ element_type = die_type (die, cu);
/* Irix 6.2 native cc creates array types without children for
arrays with unspecified length. */
- if (die->has_children == 0)
+ if (die->child == NULL)
{
- index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
+ index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
range_type = create_range_type (NULL, index_type, 0, -1);
die->type = create_array_type (NULL, element_type, range_type);
return;
}
back_to = make_cleanup (null_cleanup, NULL);
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
if (child_die->tag == DW_TAG_subrange_type)
{
- unsigned int low, high;
-
- /* Default bounds to an array with unspecified length. */
- low = 0;
- high = -1;
- if (cu_language == DW_LANG_Fortran77
- || cu_language == DW_LANG_Fortran90)
- {
- /* FORTRAN implies a lower bound of 1, if not given. */
- low = 1;
- }
-
- index_type = die_type (child_die, objfile);
- attr = dwarf_attr (child_die, DW_AT_lower_bound);
- if (attr)
- {
- if (attr->form == DW_FORM_sdata)
- {
- low = DW_SND (attr);
- }
- else if (attr->form == DW_FORM_udata
- || attr->form == DW_FORM_data1
- || attr->form == DW_FORM_data2
- || attr->form == DW_FORM_data4)
- {
- low = DW_UNSND (attr);
- }
- else
- {
- complain (&dwarf2_non_const_array_bound_ignored,
- dwarf_form_name (attr->form));
-#ifdef FORTRAN_HACK
- die->type = lookup_pointer_type (element_type);
- return;
-#else
- low = 0;
-#endif
- }
- }
- attr = dwarf_attr (child_die, DW_AT_upper_bound);
- if (attr)
- {
- if (attr->form == DW_FORM_sdata)
- {
- high = DW_SND (attr);
- }
- else if (attr->form == DW_FORM_udata
- || attr->form == DW_FORM_data1
- || attr->form == DW_FORM_data2
- || attr->form == DW_FORM_data4)
- {
- high = DW_UNSND (attr);
- }
- else if (attr->form == DW_FORM_block1)
- {
- /* GCC encodes arrays with unspecified or dynamic length
- with a DW_FORM_block1 attribute.
- FIXME: GDB does not yet know how to handle dynamic
- arrays properly, treat them as arrays with unspecified
- length for now. */
- high = -1;
- }
- else
- {
- complain (&dwarf2_non_const_array_bound_ignored,
- dwarf_form_name (attr->form));
-#ifdef FORTRAN_HACK
- die->type = lookup_pointer_type (element_type);
- return;
-#else
- high = 1;
-#endif
- }
- }
-
- /* Create a range type and save it for array type creation. */
- if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- range_types = (struct type **)
- xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct type *));
- if (ndim == 0)
- make_cleanup (free_current_contents, &range_types);
- }
- range_types[ndim++] = create_range_type (NULL, index_type, low, high);
+ read_subrange_type (child_die, cu);
+
+ if (child_die->type != NULL)
+ {
+ /* The range type was succesfully read. Save it for
+ the array type creation. */
+ if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ range_types = (struct type **)
+ xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct type *));
+ if (ndim == 0)
+ make_cleanup (free_current_contents, &range_types);
+ }
+ range_types[ndim++] = child_die->type;
+ }
}
child_die = sibling_die (child_die);
}
while (ndim-- > 0)
type = create_array_type (NULL, type, range_types[ndim]);
+ /* Understand Dwarf2 support for vector types (like they occur on
+ the PowerPC w/ AltiVec). Gcc just adds another attribute to the
+ array type. This is not part of the Dwarf2/3 standard yet, but a
+ custom vendor extension. The main difference between a regular
+ array and the vector variant is that vectors are passed by value
+ to functions. */
+ attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
+ if (attr)
+ TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
+
do_cleanups (back_to);
/* Install the type in the die. */
/* First cut: install each common block member as a global variable. */
static void
-read_common_block (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_common_block (struct die_info *die, struct dwarf2_cu *cu)
{
struct die_info *child_die;
struct attribute *attr;
struct symbol *sym;
CORE_ADDR base = (CORE_ADDR) 0;
- attr = dwarf_attr (die, DW_AT_location);
+ attr = dwarf2_attr (die, DW_AT_location, cu);
if (attr)
{
- base = decode_locdesc (DW_BLOCK (attr), objfile);
+ /* Support the .debug_loc offsets */
+ if (attr_form_is_block (attr))
+ {
+ base = decode_locdesc (DW_BLOCK (attr), cu);
+ }
+ else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
+ "common block member");
+ }
}
- if (die->has_children)
+ if (die->child != NULL)
{
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
- sym = new_symbol (child_die, NULL, objfile);
- attr = dwarf_attr (child_die, DW_AT_data_member_location);
+ sym = new_symbol (child_die, NULL, cu);
+ attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
if (attr)
{
SYMBOL_VALUE_ADDRESS (sym) =
- base + decode_locdesc (DW_BLOCK (attr), objfile);
+ base + decode_locdesc (DW_BLOCK (attr), cu);
add_symbol_to_list (sym, &global_symbols);
}
child_die = sibling_die (child_die);
}
}
+/* Read a C++ namespace. */
+
+static void
+read_namespace (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ const char *previous_prefix = processing_current_prefix;
+ const char *name;
+ int is_anonymous;
+ struct die_info *current_die;
+
+ name = namespace_name (die, &is_anonymous, cu);
+
+ /* Now build the name of the current namespace. */
+
+ if (previous_prefix[0] == '\0')
+ {
+ processing_current_prefix = name;
+ }
+ else
+ {
+ /* We need temp_name around because processing_current_prefix
+ is a const char *. */
+ char *temp_name = alloca (strlen (previous_prefix)
+ + 2 + strlen(name) + 1);
+ strcpy (temp_name, previous_prefix);
+ strcat (temp_name, "::");
+ strcat (temp_name, name);
+
+ processing_current_prefix = temp_name;
+ }
+
+ /* Add a symbol associated to this if we haven't seen the namespace
+ before. Also, add a using directive if it's an anonymous
+ namespace. */
+
+ if (dwarf2_extension (die, cu) == NULL)
+ {
+ struct type *type;
+
+ /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
+ this cast will hopefully become unnecessary. */
+ type = init_type (TYPE_CODE_NAMESPACE, 0, 0,
+ (char *) processing_current_prefix,
+ objfile);
+ TYPE_TAG_NAME (type) = TYPE_NAME (type);
+
+ new_symbol (die, type, cu);
+ die->type = type;
+
+ if (is_anonymous)
+ cp_add_using_directive (processing_current_prefix,
+ strlen (previous_prefix),
+ strlen (processing_current_prefix));
+ }
+
+ if (die->child != NULL)
+ {
+ struct die_info *child_die = die->child;
+
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
+ }
+
+ processing_current_prefix = previous_prefix;
+}
+
+/* Return the name of the namespace represented by DIE. Set
+ *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
+ namespace. */
+
+static const char *
+namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
+{
+ struct die_info *current_die;
+ const char *name = NULL;
+
+ /* Loop through the extensions until we find a name. */
+
+ for (current_die = die;
+ current_die != NULL;
+ current_die = dwarf2_extension (die, cu))
+ {
+ name = dwarf2_name (current_die, cu);
+ if (name != NULL)
+ break;
+ }
+
+ /* Is it an anonymous namespace? */
+
+ *is_anonymous = (name == NULL);
+ if (*is_anonymous)
+ name = "(anonymous namespace)";
+
+ return name;
+}
+
/* Extract all information from a DW_TAG_pointer_type DIE and add to
the user defined type vector. */
static void
-read_tag_pointer_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct comp_unit_head *cu_header = &cu->header;
struct type *type;
- struct attribute *attr;
+ struct attribute *attr_byte_size;
+ struct attribute *attr_address_class;
+ int byte_size, addr_class;
if (die->type)
{
return;
}
- type = lookup_pointer_type (die_type (die, objfile));
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
- {
- TYPE_LENGTH (type) = DW_UNSND (attr);
- }
+ type = lookup_pointer_type (die_type (die, cu));
+
+ attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr_byte_size)
+ byte_size = DW_UNSND (attr_byte_size);
+ else
+ byte_size = cu_header->addr_size;
+
+ attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
+ if (attr_address_class)
+ addr_class = DW_UNSND (attr_address_class);
else
+ addr_class = DW_ADDR_none;
+
+ /* If the pointer size or address class is different than the
+ default, create a type variant marked as such and set the
+ length accordingly. */
+ if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
{
- TYPE_LENGTH (type) = address_size;
+ if (ADDRESS_CLASS_TYPE_FLAGS_P ())
+ {
+ int type_flags;
+
+ type_flags = ADDRESS_CLASS_TYPE_FLAGS (byte_size, addr_class);
+ gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
+ type = make_type_with_address_space (type, type_flags);
+ }
+ else if (TYPE_LENGTH (type) != byte_size)
+ {
+ complaint (&symfile_complaints, "invalid pointer size %d", byte_size);
+ }
+ else {
+ /* Should we also complain about unhandled address classes? */
+ }
}
+
+ TYPE_LENGTH (type) = byte_size;
die->type = type;
}
the user defined type vector. */
static void
-read_tag_ptr_to_member_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct type *type;
struct type *to_type;
struct type *domain;
}
type = alloc_type (objfile);
- to_type = die_type (die, objfile);
- domain = die_containing_type (die, objfile);
+ to_type = die_type (die, cu);
+ domain = die_containing_type (die, cu);
smash_to_member_type (type, domain, to_type);
die->type = type;
the user defined type vector. */
static void
-read_tag_reference_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct comp_unit_head *cu_header = &cu->header;
struct type *type;
struct attribute *attr;
return;
}
- type = lookup_reference_type (die_type (die, objfile));
- attr = dwarf_attr (die, DW_AT_byte_size);
+ type = lookup_reference_type (die_type (die, cu));
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
TYPE_LENGTH (type) = DW_UNSND (attr);
}
else
{
- TYPE_LENGTH (type) = address_size;
+ TYPE_LENGTH (type) = cu_header->addr_size;
}
die->type = type;
}
static void
-read_tag_const_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct type *base_type;
+
if (die->type)
{
return;
}
- complain (&dwarf2_const_ignored);
- die->type = die_type (die, objfile);
+ base_type = die_type (die, cu);
+ die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
}
static void
-read_tag_volatile_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct type *base_type;
+
if (die->type)
{
return;
}
- complain (&dwarf2_volatile_ignored);
- die->type = die_type (die, objfile);
+ base_type = die_type (die, cu);
+ die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
}
/* Extract all information from a DW_TAG_string_type DIE and add to
attribute to reference it. */
static void
-read_tag_string_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct type *type, *range_type, *index_type, *char_type;
struct attribute *attr;
unsigned int length;
return;
}
- attr = dwarf_attr (die, DW_AT_string_length);
+ attr = dwarf2_attr (die, DW_AT_string_length, cu);
if (attr)
{
length = DW_UNSND (attr);
}
else
{
- length = 1;
+ /* check for the DW_AT_byte_size attribute */
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ length = DW_UNSND (attr);
+ }
+ else
+ {
+ length = 1;
+ }
}
- index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
+ index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
range_type = create_range_type (NULL, index_type, 1, length);
- char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
- type = create_string_type (char_type, range_type);
+ if (cu->language == language_fortran)
+ {
+ /* Need to create a unique string type for bounds
+ information */
+ type = create_string_type (0, range_type);
+ }
+ else
+ {
+ char_type = dwarf2_fundamental_type (objfile, FT_CHAR, cu);
+ type = create_string_type (char_type, range_type);
+ }
die->type = type;
}
/* Handle DIES due to C code like:
struct foo
- {
- int (*funcp)(int a, long l);
- int b;
- };
+ {
+ int (*funcp)(int a, long l);
+ int b;
+ };
('funcp' generates a DW_TAG_subroutine_type DIE)
-*/
+ */
static void
-read_subroutine_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct type *type; /* Type that this function returns */
struct type *ftype; /* Function that returns above type */
{
return;
}
- type = die_type (die, objfile);
+ type = die_type (die, cu);
ftype = lookup_function_type (type);
- attr = dwarf_attr (die, DW_AT_prototyped);
- if (attr && (DW_UNSND (attr) != 0))
+
+ /* All functions in C++ have prototypes. */
+ attr = dwarf2_attr (die, DW_AT_prototyped, cu);
+ if ((attr && (DW_UNSND (attr) != 0))
+ || cu->language == language_cplus)
TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
- if (die->has_children)
+ if (die->child != NULL)
{
struct die_info *child_die;
int nparams = 0;
/* Count the number of parameters.
FIXME: GDB currently ignores vararg functions, but knows about
vararg member functions. */
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
if (child_die->tag == DW_TAG_formal_parameter)
TYPE_FIELDS (ftype) = (struct field *)
TYPE_ALLOC (ftype, nparams * sizeof (struct field));
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
if (child_die->tag == DW_TAG_formal_parameter)
{
/* Dwarf2 has no clean way to discern C++ static and non-static
- member functions. G++ helps GDB by marking the first
- parameter for non-static member functions (which is the
- this pointer) as artificial. We pass this information
- to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
- attr = dwarf_attr (child_die, DW_AT_artificial);
+ member functions. G++ helps GDB by marking the first
+ parameter for non-static member functions (which is the
+ this pointer) as artificial. We pass this information
+ to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
+ attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
if (attr)
TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
else
TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
- TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile);
+ TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
iparams++;
}
child_die = sibling_die (child_die);
}
static void
-read_typedef (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_typedef (struct die_info *die, struct dwarf2_cu *cu)
{
- struct type *type;
+ struct objfile *objfile = cu->objfile;
+ struct attribute *attr;
+ char *name = NULL;
if (!die->type)
{
- struct attribute *attr;
- struct type *xtype;
-
- xtype = die_type (die, objfile);
-
- type = alloc_type (objfile);
- TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
- TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
- TYPE_TARGET_TYPE (type) = xtype;
- attr = dwarf_attr (die, DW_AT_name);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
- TYPE_NAME (type) = obsavestring (DW_STRING (attr),
- strlen (DW_STRING (attr)),
- &objfile->type_obstack);
-
- die->type = type;
+ {
+ name = DW_STRING (attr);
+ }
+ die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile);
+ TYPE_TARGET_TYPE (die->type) = die_type (die, cu);
}
}
it in the TYPE field of the die. */
static void
-read_base_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_base_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct type *type;
struct attribute *attr;
int encoding = 0, size = 0;
return;
}
- attr = dwarf_attr (die, DW_AT_encoding);
+ attr = dwarf2_attr (die, DW_AT_encoding, cu);
if (attr)
{
encoding = DW_UNSND (attr);
}
- attr = dwarf_attr (die, DW_AT_byte_size);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
size = DW_UNSND (attr);
}
- attr = dwarf_attr (die, DW_AT_name);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
{
enum type_code code = TYPE_CODE_INT;
- int is_unsigned = 0;
+ int type_flags = 0;
switch (encoding)
{
case DW_ATE_address:
/* Turn DW_ATE_address into a void * pointer. */
code = TYPE_CODE_PTR;
- is_unsigned = 1;
+ type_flags |= TYPE_FLAG_UNSIGNED;
break;
case DW_ATE_boolean:
code = TYPE_CODE_BOOL;
- is_unsigned = 1;
+ type_flags |= TYPE_FLAG_UNSIGNED;
break;
case DW_ATE_complex_float:
code = TYPE_CODE_COMPLEX;
break;
case DW_ATE_unsigned:
case DW_ATE_unsigned_char:
- is_unsigned = 1;
+ type_flags |= TYPE_FLAG_UNSIGNED;
break;
default:
- complain (&dwarf2_unsupported_at_encoding,
- dwarf_type_encoding_name (encoding));
+ complaint (&symfile_complaints, "unsupported DW_AT_encoding: '%s'",
+ dwarf_type_encoding_name (encoding));
break;
}
- type = init_type (code, size, is_unsigned, DW_STRING (attr), objfile);
+ type = init_type (code, size, type_flags, DW_STRING (attr), objfile);
if (encoding == DW_ATE_address)
- TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
+ TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID,
+ cu);
+ else if (encoding == DW_ATE_complex_float)
+ {
+ if (size == 32)
+ TYPE_TARGET_TYPE (type)
+ = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT, cu);
+ else if (size == 16)
+ TYPE_TARGET_TYPE (type)
+ = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
+ else if (size == 8)
+ TYPE_TARGET_TYPE (type)
+ = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
+ }
+ }
+ else
+ {
+ type = dwarf_base_type (encoding, size, cu);
+ }
+ die->type = type;
+}
+
+/* Read the given DW_AT_subrange DIE. */
+
+static void
+read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *base_type;
+ struct type *range_type;
+ struct attribute *attr;
+ int low = 0;
+ int high = -1;
+
+ /* If we have already decoded this die, then nothing more to do. */
+ if (die->type)
+ return;
+
+ base_type = die_type (die, cu);
+ if (base_type == NULL)
+ {
+ complaint (&symfile_complaints,
+ "DW_AT_type missing from DW_TAG_subrange_type");
+ return;
+ }
+
+ if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
+ base_type = alloc_type (NULL);
+
+ if (cu->language == language_fortran)
+ {
+ /* FORTRAN implies a lower bound of 1, if not given. */
+ low = 1;
+ }
+
+ attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
+ if (attr)
+ low = dwarf2_get_attr_constant_value (attr, 0);
+
+ attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
+ if (attr)
+ {
+ if (attr->form == DW_FORM_block1)
+ {
+ /* GCC encodes arrays with unspecified or dynamic length
+ with a DW_FORM_block1 attribute.
+ FIXME: GDB does not yet know how to handle dynamic
+ arrays properly, treat them as arrays with unspecified
+ length for now.
+
+ FIXME: jimb/2003-09-22: GDB does not really know
+ how to handle arrays of unspecified length
+ either; we just represent them as zero-length
+ arrays. Choose an appropriate upper bound given
+ the lower bound we've computed above. */
+ high = low - 1;
+ }
+ else
+ high = dwarf2_get_attr_constant_value (attr, 1);
+ }
+
+ range_type = create_range_type (NULL, base_type, low, high);
+
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr && DW_STRING (attr))
+ TYPE_NAME (range_type) = DW_STRING (attr);
+
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ TYPE_LENGTH (range_type) = DW_UNSND (attr);
+
+ die->type = range_type;
+}
+
+
+/* Read a whole compilation unit into a linked list of dies. */
+
+static struct die_info *
+read_comp_unit (char *info_ptr, bfd *abfd, struct dwarf2_cu *cu)
+{
+ /* Reset die reference table; we are
+ building new ones now. */
+ dwarf2_empty_hash_tables ();
+
+ return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL);
+}
+
+/* Read a single die and all its descendents. Set the die's sibling
+ field to NULL; set other fields in the die correctly, and set all
+ of the descendents' fields correctly. Set *NEW_INFO_PTR to the
+ location of the info_ptr after reading all of those dies. PARENT
+ is the parent of the die in question. */
+
+static struct die_info *
+read_die_and_children (char *info_ptr, bfd *abfd,
+ struct dwarf2_cu *cu,
+ char **new_info_ptr,
+ struct die_info *parent)
+{
+ struct die_info *die;
+ char *cur_ptr;
+ int has_children;
+
+ cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children);
+ store_in_ref_table (die->offset, die);
+
+ if (has_children)
+ {
+ die->child = read_die_and_siblings (cur_ptr, abfd, cu,
+ new_info_ptr, die);
}
else
{
- type = dwarf_base_type (encoding, size, objfile);
+ die->child = NULL;
+ *new_info_ptr = cur_ptr;
}
- die->type = type;
+
+ die->sibling = NULL;
+ die->parent = parent;
+ return die;
}
-/* Read a whole compilation unit into a linked list of dies. */
+/* Read a die, all of its descendents, and all of its siblings; set
+ all of the fields of all of the dies correctly. Arguments are as
+ in read_die_and_children. */
-struct die_info *
-read_comp_unit (info_ptr, abfd)
- char *info_ptr;
- bfd *abfd;
+static struct die_info *
+read_die_and_siblings (char *info_ptr, bfd *abfd,
+ struct dwarf2_cu *cu,
+ char **new_info_ptr,
+ struct die_info *parent)
{
- struct die_info *first_die, *last_die, *die;
+ struct die_info *first_die, *last_sibling;
char *cur_ptr;
- int nesting_level;
-
- /* Reset die reference table, we are building a new one now. */
- dwarf2_empty_die_ref_table ();
cur_ptr = info_ptr;
- nesting_level = 0;
- first_die = last_die = NULL;
- do
+ first_die = last_sibling = NULL;
+
+ while (1)
{
- cur_ptr = read_full_die (&die, abfd, cur_ptr);
- if (die->has_children)
+ struct die_info *die
+ = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
+
+ if (!first_die)
{
- nesting_level++;
+ first_die = die;
}
- if (die->tag == 0)
+ else
{
- nesting_level--;
+ last_sibling->sibling = die;
}
- die->next = NULL;
-
- /* Enter die in reference hash table */
- store_in_ref_table (die->offset, die);
-
- if (!first_die)
+ if (die->tag == 0)
{
- first_die = last_die = die;
+ *new_info_ptr = cur_ptr;
+ return first_die;
}
else
{
- last_die->next = die;
- last_die = die;
+ last_sibling = die;
}
}
- while (nesting_level > 0);
- return first_die;
}
/* Free a linked list of dies. */
static void
-free_die_list (dies)
- struct die_info *dies;
+free_die_list (struct die_info *dies)
{
struct die_info *die, *next;
die = dies;
while (die)
{
- next = die->next;
- free (die->attrs);
- free (die);
+ if (die->child != NULL)
+ free_die_list (die->child);
+ next = die->sibling;
+ xfree (die->attrs);
+ xfree (die);
die = next;
}
}
+static void
+do_free_die_list_cleanup (void *dies)
+{
+ free_die_list (dies);
+}
+
+static struct cleanup *
+make_cleanup_free_die_list (struct die_info *dies)
+{
+ return make_cleanup (do_free_die_list_cleanup, dies);
+}
+
+
/* Read the contents of the section at OFFSET and of size SIZE from the
- object file specified by OBJFILE into the psymbol_obstack and return it. */
+ object file specified by OBJFILE into the objfile_obstack and return it. */
-static char *
-dwarf2_read_section (objfile, offset, size)
- struct objfile *objfile;
- file_ptr offset;
- unsigned int size;
+char *
+dwarf2_read_section (struct objfile *objfile, asection *sectp)
{
bfd *abfd = objfile->obfd;
- char *buf;
+ char *buf, *retbuf;
+ bfd_size_type size = bfd_get_section_size_before_reloc (sectp);
if (size == 0)
return NULL;
- buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
- if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
- (bfd_read (buf, size, 1, abfd) != size))
- {
- buf = NULL;
- error ("Dwarf Error: Can't read DWARF data from '%s'",
- bfd_get_filename (abfd));
- }
+ buf = (char *) obstack_alloc (&objfile->objfile_obstack, size);
+ retbuf
+ = (char *) symfile_relocate_debug_section (abfd, sectp, (bfd_byte *) buf);
+ if (retbuf != NULL)
+ return retbuf;
+
+ if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
+ || bfd_bread (buf, size, abfd) != size)
+ error ("Dwarf Error: Can't read DWARF data from '%s'",
+ bfd_get_filename (abfd));
+
return buf;
}
/* In DWARF version 2, the description of the debugging information is
stored in a separate .debug_abbrev section. Before we read any
dies from a section we read in all abbreviations and install them
- in a hash table. */
+ in a hash table. This function also sets flags in CU describing
+ the data found in the abbrev table. */
static void
-dwarf2_read_abbrevs (abfd, offset)
- bfd * abfd;
- unsigned int offset;
+dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
{
+ struct comp_unit_head *cu_header = &cu->header;
char *abbrev_ptr;
struct abbrev_info *cur_abbrev;
unsigned int abbrev_number, bytes_read, abbrev_name;
unsigned int abbrev_form, hash_number;
-
- /* empty the table */
- dwarf2_empty_abbrev_table (NULL);
-
- abbrev_ptr = dwarf_abbrev_buffer + offset;
+ struct attr_abbrev *cur_attrs;
+ unsigned int allocated_attrs;
+
+ /* Initialize dwarf2 abbrevs */
+ obstack_init (&cu->abbrev_obstack);
+ cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
+ (ABBREV_HASH_SIZE
+ * sizeof (struct abbrev_info *)));
+ memset (cu->dwarf2_abbrevs, 0,
+ ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
+
+ abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
+ allocated_attrs = ATTR_ALLOC_CHUNK;
+ cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
+
/* loop until we reach an abbrev number of 0 */
while (abbrev_number)
{
- cur_abbrev = dwarf_alloc_abbrev ();
+ cur_abbrev = dwarf_alloc_abbrev (cu);
/* read in abbrev header */
cur_abbrev->number = abbrev_number;
cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
abbrev_ptr += 1;
+ if (cur_abbrev->tag == DW_TAG_namespace)
+ cu->has_namespace_info = 1;
+
/* now read in declarations */
abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
abbrev_ptr += bytes_read;
while (abbrev_name)
{
- if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
+ if (cur_abbrev->num_attrs == allocated_attrs)
{
- cur_abbrev->attrs = (struct attr_abbrev *)
- xrealloc (cur_abbrev->attrs,
- (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
- * sizeof (struct attr_abbrev));
+ allocated_attrs += ATTR_ALLOC_CHUNK;
+ cur_attrs
+ = xrealloc (cur_attrs, (allocated_attrs
+ * sizeof (struct attr_abbrev)));
}
- cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
- cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
+ cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
+ cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
}
+ cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
+ (cur_abbrev->num_attrs
+ * sizeof (struct attr_abbrev)));
+ memcpy (cur_abbrev->attrs, cur_attrs,
+ cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
+
hash_number = abbrev_number % ABBREV_HASH_SIZE;
- cur_abbrev->next = dwarf2_abbrevs[hash_number];
- dwarf2_abbrevs[hash_number] = cur_abbrev;
+ cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
+ cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
/* Get next abbreviation.
Under Irix6 the abbreviations for a compilation unit are not
- always properly terminated with an abbrev number of 0.
- Exit loop if we encounter an abbreviation which we have
- already read (which means we are about to read the abbreviations
- for the next compile unit) or if the end of the abbreviation
- table is reached. */
- if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
- >= dwarf_abbrev_size)
+ always properly terminated with an abbrev number of 0.
+ Exit loop if we encounter an abbreviation which we have
+ already read (which means we are about to read the abbreviations
+ for the next compile unit) or if the end of the abbreviation
+ table is reached. */
+ if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer)
+ >= dwarf2_per_objfile->abbrev_size)
break;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
- if (dwarf2_lookup_abbrev (abbrev_number) != NULL)
+ if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
break;
}
+
+ xfree (cur_attrs);
}
-/* Empty the abbrev table for a new compilation unit. */
+/* Release the memory used by the abbrev table for a compilation unit. */
-/* ARGSUSED */
static void
-dwarf2_empty_abbrev_table (ignore)
- PTR ignore;
+dwarf2_free_abbrev_table (void *ptr_to_cu)
{
- int i;
- struct abbrev_info *abbrev, *next;
+ struct dwarf2_cu *cu = ptr_to_cu;
- for (i = 0; i < ABBREV_HASH_SIZE; ++i)
- {
- next = NULL;
- abbrev = dwarf2_abbrevs[i];
- while (abbrev)
- {
- next = abbrev->next;
- free (abbrev->attrs);
- free (abbrev);
- abbrev = next;
- }
- dwarf2_abbrevs[i] = NULL;
- }
+ obstack_free (&cu->abbrev_obstack, NULL);
+ cu->dwarf2_abbrevs = NULL;
}
/* Lookup an abbrev_info structure in the abbrev hash table. */
static struct abbrev_info *
-dwarf2_lookup_abbrev (number)
- unsigned int number;
+dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
{
unsigned int hash_number;
struct abbrev_info *abbrev;
hash_number = number % ABBREV_HASH_SIZE;
- abbrev = dwarf2_abbrevs[hash_number];
+ abbrev = cu->dwarf2_abbrevs[hash_number];
while (abbrev)
{
return NULL;
}
+/* Returns nonzero if TAG represents a type that we might generate a partial
+ symbol for. */
+
+static int
+is_type_tag_for_partial (int tag)
+{
+ switch (tag)
+ {
+#if 0
+ /* Some types that would be reasonable to generate partial symbols for,
+ that we don't at present. */
+ case DW_TAG_array_type:
+ case DW_TAG_file_type:
+ case DW_TAG_ptr_to_member_type:
+ case DW_TAG_set_type:
+ case DW_TAG_string_type:
+ case DW_TAG_subroutine_type:
+#endif
+ case DW_TAG_base_type:
+ case DW_TAG_class_type:
+ case DW_TAG_enumeration_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_subrange_type:
+ case DW_TAG_typedef:
+ case DW_TAG_union_type:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+/* Load all DIEs that are interesting for partial symbols into memory. */
+
+static struct partial_die_info *
+load_partial_dies (bfd *abfd, char *info_ptr, int building_psymtab,
+ struct dwarf2_cu *cu)
+{
+ struct partial_die_info *part_die;
+ struct partial_die_info *parent_die, *last_die, *first_die = NULL;
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+
+ int nesting_level = 1;
+
+ parent_die = NULL;
+ last_die = NULL;
+
+ cu->partial_dies
+ = htab_create_alloc_ex (cu->header.length / 12,
+ partial_die_hash,
+ partial_die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+
+ part_die = obstack_alloc (&cu->comp_unit_obstack,
+ sizeof (struct partial_die_info));
+
+ while (1)
+ {
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
+
+ /* A NULL abbrev means the end of a series of children. */
+ if (abbrev == NULL)
+ {
+ if (--nesting_level == 0)
+ {
+ /* PART_DIE was probably the last thing allocated on the
+ comp_unit_obstack, so we could call obstack_free
+ here. We don't do that because the waste is small,
+ and will be cleaned up when we're done with this
+ compilation unit. This way, we're also more robust
+ against other users of the comp_unit_obstack. */
+ return first_die;
+ }
+ info_ptr += bytes_read;
+ last_die = parent_die;
+ parent_die = parent_die->die_parent;
+ continue;
+ }
+
+ /* Check whether this DIE is interesting enough to save. */
+ if (!is_type_tag_for_partial (abbrev->tag)
+ && abbrev->tag != DW_TAG_enumerator
+ && abbrev->tag != DW_TAG_subprogram
+ && abbrev->tag != DW_TAG_variable
+ && abbrev->tag != DW_TAG_namespace)
+ {
+ /* Otherwise we skip to the next sibling, if any. */
+ info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
+ continue;
+ }
+
+ info_ptr = read_partial_die (part_die, abbrev, bytes_read,
+ abfd, info_ptr, cu);
+
+ /* This two-pass algorithm for processing partial symbols has a
+ high cost in cache pressure. Thus, handle some simple cases
+ here which cover the majority of C partial symbols. DIEs
+ which neither have specification tags in them, nor could have
+ specification tags elsewhere pointing at them, can simply be
+ processed and discarded.
+
+ This segment is also optional; scan_partial_symbols and
+ add_partial_symbol will handle these DIEs if we chain
+ them in normally. When compilers which do not emit large
+ quantities of duplicate debug information are more common,
+ this code can probably be removed. */
+
+ /* Any complete simple types at the top level (pretty much all
+ of them, for a language without namespaces), can be processed
+ directly. */
+ if (parent_die == NULL
+ && part_die->has_specification == 0
+ && part_die->is_declaration == 0
+ && (part_die->tag == DW_TAG_typedef
+ || part_die->tag == DW_TAG_base_type
+ || part_die->tag == DW_TAG_subrange_type))
+ {
+ if (building_psymtab && part_die->name != NULL)
+ add_psymbol_to_list (part_die->name, strlen (part_die->name),
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &cu->objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, cu->objfile);
+ info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
+ continue;
+ }
+
+ /* If we're at the second level, and we're an enumerator, and
+ our parent has no specification (meaning possibly lives in a
+ namespace elsewhere), then we can add the partial symbol now
+ instead of queueing it. */
+ if (part_die->tag == DW_TAG_enumerator
+ && parent_die != NULL
+ && parent_die->die_parent == NULL
+ && parent_die->tag == DW_TAG_enumeration_type
+ && parent_die->has_specification == 0)
+ {
+ if (part_die->name == NULL)
+ complaint (&symfile_complaints, "malformed enumerator DIE ignored");
+ else if (building_psymtab)
+ add_psymbol_to_list (part_die->name, strlen (part_die->name),
+ VAR_DOMAIN, LOC_CONST,
+ cu->language == language_cplus
+ ? &cu->objfile->global_psymbols
+ : &cu->objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, cu->objfile);
+
+ info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
+ continue;
+ }
+
+ /* We'll save this DIE so link it in. */
+ part_die->die_parent = parent_die;
+ part_die->die_sibling = NULL;
+ part_die->die_child = NULL;
+
+ if (last_die && last_die == parent_die)
+ last_die->die_child = part_die;
+ else if (last_die)
+ last_die->die_sibling = part_die;
+
+ last_die = part_die;
+
+ if (first_die == NULL)
+ first_die = part_die;
+
+ /* Maybe add the DIE to the hash table. Not all DIEs that we
+ find interesting need to be in the hash table, because we
+ also have the parent/sibling/child chains; only those that we
+ might refer to by offset later during partial symbol reading.
+
+ For now this means things that might have be the target of a
+ DW_AT_specification, DW_AT_abstract_origin, or
+ DW_AT_extension. DW_AT_extension will refer only to
+ namespaces; DW_AT_abstract_origin refers to functions (and
+ many things under the function DIE, but we do not recurse
+ into function DIEs during partial symbol reading) and
+ possibly variables as well; DW_AT_specification refers to
+ declarations. Declarations ought to have the DW_AT_declaration
+ flag. It happens that GCC forgets to put it in sometimes, but
+ only for functions, not for types.
+
+ Adding more things than necessary to the hash table is harmless
+ except for the performance cost. Adding too few will result in
+ internal errors in find_partial_die. */
+
+ if (abbrev->tag == DW_TAG_subprogram
+ || abbrev->tag == DW_TAG_variable
+ || abbrev->tag == DW_TAG_namespace
+ || part_die->is_declaration)
+ {
+ void **slot;
+
+ slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
+ part_die->offset, INSERT);
+ *slot = part_die;
+ }
+
+ part_die = obstack_alloc (&cu->comp_unit_obstack,
+ sizeof (struct partial_die_info));
+
+ /* For some DIEs we want to follow their children (if any). For C
+ we have no reason to follow the children of structures; for other
+ languages we have to, both so that we can get at method physnames
+ to infer fully qualified class names, and for DW_AT_specification. */
+ if (last_die->has_children
+ && (last_die->tag == DW_TAG_namespace
+ || last_die->tag == DW_TAG_enumeration_type
+ || (cu->language != language_c
+ && (last_die->tag == DW_TAG_class_type
+ || last_die->tag == DW_TAG_structure_type
+ || last_die->tag == DW_TAG_union_type))))
+ {
+ nesting_level++;
+ parent_die = last_die;
+ continue;
+ }
+
+ /* Otherwise we skip to the next sibling, if any. */
+ info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu);
+
+ /* Back to the top, do it again. */
+ }
+}
+
/* Read a minimal amount of information into the minimal die structure. */
static char *
-read_partial_die (part_die, abfd, info_ptr, has_pc_info)
- struct partial_die_info *part_die;
- bfd * abfd;
- char *info_ptr;
- int *has_pc_info;
+read_partial_die (struct partial_die_info *part_die,
+ struct abbrev_info *abbrev,
+ unsigned int abbrev_len, bfd *abfd,
+ char *info_ptr, struct dwarf2_cu *cu)
{
- unsigned int abbrev_number, bytes_read, i;
- struct abbrev_info *abbrev;
+ unsigned int bytes_read, i;
struct attribute attr;
- struct attribute spec_attr;
- int found_spec_attr = 0;
- int has_low_pc_attr = 0;
+ int has_low_pc_attr = 0;
int has_high_pc_attr = 0;
- *part_die = zeroed_partial_die;
- *has_pc_info = 0;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- if (!abbrev_number)
+ memset (part_die, 0, sizeof (struct partial_die_info));
+
+ part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer;
+
+ info_ptr += abbrev_len;
+
+ if (abbrev == NULL)
return info_ptr;
- abbrev = dwarf2_lookup_abbrev (abbrev_number);
- if (!abbrev)
- {
- error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
- }
- part_die->offset = info_ptr - dwarf_info_buffer;
part_die->tag = abbrev->tag;
part_die->has_children = abbrev->has_children;
- part_die->abbrev = abbrev_number;
for (i = 0; i < abbrev->num_attrs; ++i)
{
- info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr);
+ info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
/* Store the data if it is of an attribute we want to keep in a
- partial symbol table. */
+ partial symbol table. */
switch (attr.name)
{
case DW_AT_name:
if (part_die->name == NULL)
part_die->name = DW_STRING (&attr);
break;
+ case DW_AT_comp_dir:
+ if (part_die->dirname == NULL)
+ part_die->dirname = DW_STRING (&attr);
+ break;
case DW_AT_MIPS_linkage_name:
part_die->name = DW_STRING (&attr);
break;
part_die->highpc = DW_ADDR (&attr);
break;
case DW_AT_location:
- part_die->locdesc = DW_BLOCK (&attr);
+ /* Support the .debug_loc offsets */
+ if (attr_form_is_block (&attr))
+ {
+ part_die->locdesc = DW_BLOCK (&attr);
+ }
+ else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8)
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
+ "partial symbol information");
+ }
break;
case DW_AT_language:
part_die->language = DW_UNSND (&attr);
break;
case DW_AT_abstract_origin:
case DW_AT_specification:
- found_spec_attr = 1;
- spec_attr = attr;
+ case DW_AT_extension:
+ part_die->has_specification = 1;
+ part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu);
break;
case DW_AT_sibling:
/* Ignore absolute siblings, they might point outside of
the current compile unit. */
if (attr.form == DW_FORM_ref_addr)
- complain(&dwarf2_absolute_sibling_complaint);
+ complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling");
else
- part_die->sibling =
- dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
+ part_die->sibling = dwarf2_per_objfile->info_buffer
+ + dwarf2_get_ref_die_offset (&attr, cu);
break;
+ case DW_AT_stmt_list:
+ part_die->has_stmt_list = 1;
+ part_die->line_offset = DW_UNSND (&attr);
+ break;
default:
break;
}
}
- /* If we found a reference attribute and the die has no name, try
- to find a name in the referred to die. */
-
- if (found_spec_attr && part_die->name == NULL)
- {
- struct partial_die_info spec_die;
- char *spec_ptr;
- int dummy;
-
- spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
- read_partial_die (&spec_die, abfd, spec_ptr, &dummy);
- if (spec_die.name)
- {
- part_die->name = spec_die.name;
-
- /* Copy DW_AT_external attribute if it is set. */
- if (spec_die.is_external)
- part_die->is_external = spec_die.is_external;
- }
- }
-
/* When using the GNU linker, .gnu.linkonce. sections are used to
eliminate duplicate copies of functions and vtables and such.
The linker will arbitrarily choose one and discard the others.
&& part_die->lowpc < part_die->highpc
&& (part_die->lowpc != 0
|| (bfd_get_file_flags (abfd) & HAS_RELOC)))
- *has_pc_info = 1;
+ part_die->has_pc_info = 1;
return info_ptr;
}
-/* Read the die from the .debug_info section buffer. And set diep to
- point to a newly allocated die with its information. */
+/* Find a cached partial DIE at OFFSET in CU. */
+
+static struct partial_die_info *
+find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu)
+{
+ struct partial_die_info *lookup_die = NULL;
+ struct partial_die_info part_die;
+
+ part_die.offset = offset;
+ lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
+
+ if (lookup_die == NULL)
+ internal_error (__FILE__, __LINE__,
+ "could not find partial DIE in cache\n");
+
+ return lookup_die;
+}
+
+/* Find a partial DIE at OFFSET, which may or may not be in CU. */
+
+static struct partial_die_info *
+find_partial_die (unsigned long offset, struct dwarf2_cu *cu,
+ struct dwarf2_cu **target_cu)
+{
+ struct dwarf2_per_cu_data *per_cu;
+
+ if (offset >= cu->header.offset
+ && offset < cu->header.offset + cu->header.length)
+ {
+ *target_cu = cu;
+ return find_partial_die_in_comp_unit (offset, cu);
+ }
+
+ internal_error (__FILE__, __LINE__,
+ "unsupported inter-compilation-unit reference");
+}
+
+/* Adjust PART_DIE before generating a symbol for it. This function
+ may set the is_external flag or change the DIE's name. */
+
+static void
+fixup_partial_die (struct partial_die_info *part_die,
+ struct dwarf2_cu *cu)
+{
+ /* If we found a reference attribute and the DIE has no name, try
+ to find a name in the referred to DIE. */
+
+ if (part_die->name == NULL && part_die->has_specification)
+ {
+ struct partial_die_info *spec_die;
+ struct dwarf2_cu *spec_cu;
+
+ spec_die = find_partial_die (part_die->spec_offset, cu, &spec_cu);
+
+ fixup_partial_die (spec_die, spec_cu);
+
+ if (spec_die->name)
+ {
+ part_die->name = spec_die->name;
+
+ /* Copy DW_AT_external attribute if it is set. */
+ if (spec_die->is_external)
+ part_die->is_external = spec_die->is_external;
+ }
+ }
+
+ /* Set default names for some unnamed DIEs. */
+ if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
+ || part_die->tag == DW_TAG_class_type))
+ part_die->name = "(anonymous class)";
+
+ if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
+ part_die->name = "(anonymous namespace)";
+
+ if (part_die->tag == DW_TAG_structure_type
+ || part_die->tag == DW_TAG_class_type
+ || part_die->tag == DW_TAG_union_type)
+ guess_structure_name (part_die, cu);
+}
+
+/* Read the die from the .debug_info section buffer. Set DIEP to
+ point to a newly allocated die with its information, except for its
+ child, sibling, and parent fields. Set HAS_CHILDREN to tell
+ whether the die has children or not. */
static char *
-read_full_die (diep, abfd, info_ptr)
- struct die_info **diep;
- bfd *abfd;
- char *info_ptr;
+read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr,
+ struct dwarf2_cu *cu, int *has_children)
{
unsigned int abbrev_number, bytes_read, i, offset;
struct abbrev_info *abbrev;
struct die_info *die;
- offset = info_ptr - dwarf_info_buffer;
+ offset = info_ptr - dwarf2_per_objfile->info_buffer;
abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
if (!abbrev_number)
die->abbrev = abbrev_number;
die->type = NULL;
*diep = die;
+ *has_children = 0;
return info_ptr;
}
- abbrev = dwarf2_lookup_abbrev (abbrev_number);
+ abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
if (!abbrev)
{
- error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
+ error ("Dwarf Error: could not find abbrev number %d [in module %s]",
+ abbrev_number,
+ bfd_get_filename (abfd));
}
die = dwarf_alloc_die ();
die->offset = offset;
die->tag = abbrev->tag;
- die->has_children = abbrev->has_children;
die->abbrev = abbrev_number;
die->type = NULL;
for (i = 0; i < abbrev->num_attrs; ++i)
{
info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
- abfd, info_ptr);
+ abfd, info_ptr, cu);
}
*diep = die;
+ *has_children = abbrev->has_children;
return info_ptr;
}
-/* Read an attribute described by an abbreviated attribute. */
+/* Read an attribute value described by an attribute form. */
static char *
-read_attribute (attr, abbrev, abfd, info_ptr)
- struct attribute *attr;
- struct attr_abbrev *abbrev;
- bfd *abfd;
- char *info_ptr;
+read_attribute_value (struct attribute *attr, unsigned form,
+ bfd *abfd, char *info_ptr,
+ struct dwarf2_cu *cu)
{
+ struct comp_unit_head *cu_header = &cu->header;
unsigned int bytes_read;
struct dwarf_block *blk;
- attr->name = abbrev->name;
- attr->form = abbrev->form;
- switch (abbrev->form)
+ attr->form = form;
+ switch (form)
{
case DW_FORM_addr:
case DW_FORM_ref_addr:
- DW_ADDR (attr) = read_address (abfd, info_ptr);
- info_ptr += address_size;
+ DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
+ info_ptr += bytes_read;
break;
case DW_FORM_block2:
- blk = dwarf_alloc_block ();
+ blk = dwarf_alloc_block (cu);
blk->size = read_2_bytes (abfd, info_ptr);
info_ptr += 2;
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
DW_BLOCK (attr) = blk;
break;
case DW_FORM_block4:
- blk = dwarf_alloc_block ();
+ blk = dwarf_alloc_block (cu);
blk->size = read_4_bytes (abfd, info_ptr);
info_ptr += 4;
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
break;
+ case DW_FORM_strp:
+ DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
+ &bytes_read);
+ info_ptr += bytes_read;
+ break;
case DW_FORM_block:
- blk = dwarf_alloc_block ();
+ blk = dwarf_alloc_block (cu);
blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
DW_BLOCK (attr) = blk;
break;
case DW_FORM_block1:
- blk = dwarf_alloc_block ();
+ blk = dwarf_alloc_block (cu);
blk->size = read_1_byte (abfd, info_ptr);
info_ptr += 1;
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
info_ptr += 4;
break;
+ case DW_FORM_ref8:
+ DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
case DW_FORM_ref_udata:
DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
break;
- case DW_FORM_strp:
case DW_FORM_indirect:
+ form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
+ break;
default:
- error ("Dwarf Error: Cannot handle %s in DWARF reader.",
- dwarf_form_name (abbrev->form));
+ error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
}
return info_ptr;
}
+/* Read an attribute described by an abbreviated attribute. */
+
+static char *
+read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
+ bfd *abfd, char *info_ptr, struct dwarf2_cu *cu)
+{
+ attr->name = abbrev->name;
+ return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
+}
+
/* read dwarf information from a buffer */
static unsigned int
-read_1_byte (abfd, buf)
- bfd *abfd;
- char *buf;
+read_1_byte (bfd *abfd, char *buf)
{
return bfd_get_8 (abfd, (bfd_byte *) buf);
}
static int
-read_1_signed_byte (abfd, buf)
- bfd *abfd;
- char *buf;
+read_1_signed_byte (bfd *abfd, char *buf)
{
return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
}
static unsigned int
-read_2_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_2_bytes (bfd *abfd, char *buf)
{
return bfd_get_16 (abfd, (bfd_byte *) buf);
}
static int
-read_2_signed_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_2_signed_bytes (bfd *abfd, char *buf)
{
return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
}
static unsigned int
-read_4_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_4_bytes (bfd *abfd, char *buf)
{
return bfd_get_32 (abfd, (bfd_byte *) buf);
}
static int
-read_4_signed_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+read_4_signed_bytes (bfd *abfd, char *buf)
{
return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
}
-static unsigned int
-read_8_bytes (abfd, buf)
- bfd *abfd;
- char *buf;
+static unsigned long
+read_8_bytes (bfd *abfd, char *buf)
{
return bfd_get_64 (abfd, (bfd_byte *) buf);
}
static CORE_ADDR
-read_address (abfd, buf)
- bfd *abfd;
- char *buf;
+read_address (bfd *abfd, char *buf, struct dwarf2_cu *cu, int *bytes_read)
{
+ struct comp_unit_head *cu_header = &cu->header;
CORE_ADDR retval = 0;
- if (address_size == 4)
+ if (cu_header->signed_addr_p)
+ {
+ switch (cu_header->addr_size)
+ {
+ case 2:
+ retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf);
+ break;
+ case 4:
+ retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf);
+ break;
+ case 8:
+ retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "read_address: bad switch, signed [in module %s]",
+ bfd_get_filename (abfd));
+ }
+ }
+ else
+ {
+ switch (cu_header->addr_size)
+ {
+ case 2:
+ retval = bfd_get_16 (abfd, (bfd_byte *) buf);
+ break;
+ case 4:
+ retval = bfd_get_32 (abfd, (bfd_byte *) buf);
+ break;
+ case 8:
+ retval = bfd_get_64 (abfd, (bfd_byte *) buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "read_address: bad switch, unsigned [in module %s]",
+ bfd_get_filename (abfd));
+ }
+ }
+
+ *bytes_read = cu_header->addr_size;
+ return retval;
+}
+
+/* Read the initial length from a section. The (draft) DWARF 3
+ specification allows the initial length to take up either 4 bytes
+ or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
+ bytes describe the length and all offsets will be 8 bytes in length
+ instead of 4.
+
+ An older, non-standard 64-bit format is also handled by this
+ function. The older format in question stores the initial length
+ as an 8-byte quantity without an escape value. Lengths greater
+ than 2^32 aren't very common which means that the initial 4 bytes
+ is almost always zero. Since a length value of zero doesn't make
+ sense for the 32-bit format, this initial zero can be considered to
+ be an escape value which indicates the presence of the older 64-bit
+ format. As written, the code can't detect (old format) lengths
+ greater than 4GB. If it becomes necessary to handle lengths somewhat
+ larger than 4GB, we could allow other small values (such as the
+ non-sensical values of 1, 2, and 3) to also be used as escape values
+ indicating the presence of the old format.
+
+ The value returned via bytes_read should be used to increment
+ the relevant pointer after calling read_initial_length().
+
+ As a side effect, this function sets the fields initial_length_size
+ and offset_size in cu_header to the values appropriate for the
+ length field. (The format of the initial length field determines
+ the width of file offsets to be fetched later with fetch_offset().)
+
+ [ Note: read_initial_length() and read_offset() are based on the
+ document entitled "DWARF Debugging Information Format", revision
+ 3, draft 8, dated November 19, 2001. This document was obtained
+ from:
+
+ http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
+
+ This document is only a draft and is subject to change. (So beware.)
+
+ Details regarding the older, non-standard 64-bit format were
+ determined empirically by examining 64-bit ELF files produced
+ by the SGI toolchain on an IRIX 6.5 machine.
+
+ - Kevin, July 16, 2002
+ ] */
+
+static LONGEST
+read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header,
+ int *bytes_read)
+{
+ LONGEST retval = 0;
+
+ retval = bfd_get_32 (abfd, (bfd_byte *) buf);
+
+ if (retval == 0xffffffff)
+ {
+ retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4);
+ *bytes_read = 12;
+ if (cu_header != NULL)
+ {
+ cu_header->initial_length_size = 12;
+ cu_header->offset_size = 8;
+ }
+ }
+ else if (retval == 0)
+ {
+ /* Handle (non-standard) 64-bit DWARF2 formats such as that used
+ by IRIX. */
+ retval = bfd_get_64 (abfd, (bfd_byte *) buf);
+ *bytes_read = 8;
+ if (cu_header != NULL)
+ {
+ cu_header->initial_length_size = 8;
+ cu_header->offset_size = 8;
+ }
+ }
+ else
+ {
+ *bytes_read = 4;
+ if (cu_header != NULL)
+ {
+ cu_header->initial_length_size = 4;
+ cu_header->offset_size = 4;
+ }
+ }
+
+ return retval;
+}
+
+/* Read an offset from the data stream. The size of the offset is
+ given by cu_header->offset_size. */
+
+static LONGEST
+read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
+ int *bytes_read)
+{
+ LONGEST retval = 0;
+
+ switch (cu_header->offset_size)
{
+ case 4:
retval = bfd_get_32 (abfd, (bfd_byte *) buf);
- } else { /* *THE* alternative is 8, right? */
+ *bytes_read = 4;
+ break;
+ case 8:
retval = bfd_get_64 (abfd, (bfd_byte *) buf);
+ *bytes_read = 8;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "read_offset: bad switch [in module %s]",
+ bfd_get_filename (abfd));
}
- return retval;
+
+ return retval;
}
static char *
-read_n_bytes (abfd, buf, size)
- bfd * abfd;
- char *buf;
- unsigned int size;
+read_n_bytes (bfd *abfd, char *buf, unsigned int size)
{
/* If the size of a host char is 8 bits, we can return a pointer
to the buffer, otherwise we have to copy the data to a buffer
allocated on the temporary obstack. */
-#if HOST_CHAR_BIT == 8
+ gdb_assert (HOST_CHAR_BIT == 8);
return buf;
-#else
- char *ret;
- unsigned int i;
-
- ret = obstack_alloc (&dwarf2_tmp_obstack, size);
- for (i = 0; i < size; ++i)
- {
- ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf);
- buf++;
- }
- return ret;
-#endif
}
static char *
-read_string (abfd, buf, bytes_read_ptr)
- bfd *abfd;
- char *buf;
- unsigned int *bytes_read_ptr;
+read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
{
/* If the size of a host char is 8 bits, we can return a pointer
to the string, otherwise we have to copy the string to a buffer
allocated on the temporary obstack. */
-#if HOST_CHAR_BIT == 8
+ gdb_assert (HOST_CHAR_BIT == 8);
if (*buf == '\0')
{
*bytes_read_ptr = 1;
}
*bytes_read_ptr = strlen (buf) + 1;
return buf;
-#else
- int byte;
- unsigned int i = 0;
+}
+
+static char *
+read_indirect_string (bfd *abfd, char *buf,
+ const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read_ptr)
+{
+ LONGEST str_offset = read_offset (abfd, buf, cu_header,
+ (int *) bytes_read_ptr);
- while ((byte = bfd_get_8 (abfd, (bfd_byte *) buf)) != 0)
+ if (dwarf2_per_objfile->str_buffer == NULL)
{
- obstack_1grow (&dwarf2_tmp_obstack, byte);
- i++;
- buf++;
+ error ("DW_FORM_strp used without .debug_str section [in module %s]",
+ bfd_get_filename (abfd));
+ return NULL;
}
- if (i == 0)
+ if (str_offset >= dwarf2_per_objfile->str_size)
{
- *bytes_read_ptr = 1;
+ error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]",
+ bfd_get_filename (abfd));
return NULL;
}
- obstack_1grow (&dwarf2_tmp_obstack, '\0');
- *bytes_read_ptr = i + 1;
- return obstack_finish (&dwarf2_tmp_obstack);
-#endif
+ gdb_assert (HOST_CHAR_BIT == 8);
+ if (dwarf2_per_objfile->str_buffer[str_offset] == '\0')
+ return NULL;
+ return dwarf2_per_objfile->str_buffer + str_offset;
}
-static unsigned int
-read_unsigned_leb128 (abfd, buf, bytes_read_ptr)
- bfd *abfd;
- char *buf;
- unsigned int *bytes_read_ptr;
+static unsigned long
+read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
{
- unsigned int result, num_read;
+ unsigned long result;
+ unsigned int num_read;
int i, shift;
unsigned char byte;
byte = bfd_get_8 (abfd, (bfd_byte *) buf);
buf++;
num_read++;
- result |= ((byte & 127) << shift);
+ result |= ((unsigned long)(byte & 127) << shift);
if ((byte & 128) == 0)
{
break;
return result;
}
-static int
-read_signed_leb128 (abfd, buf, bytes_read_ptr)
- bfd *abfd;
- char *buf;
- unsigned int *bytes_read_ptr;
+static long
+read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
{
- int result;
+ long result;
int i, shift, size, num_read;
unsigned char byte;
byte = bfd_get_8 (abfd, (bfd_byte *) buf);
buf++;
num_read++;
- result |= ((byte & 127) << shift);
+ result |= ((long)(byte & 127) << shift);
shift += 7;
if ((byte & 128) == 0)
{
return result;
}
+/* Return a pointer to just past the end of an LEB128 number in BUF. */
+
+static char *
+skip_leb128 (bfd *abfd, char *buf)
+{
+ int byte;
+
+ while (1)
+ {
+ byte = bfd_get_8 (abfd, (bfd_byte *) buf);
+ buf++;
+ if ((byte & 128) == 0)
+ return buf;
+ }
+}
+
static void
-set_cu_language (lang)
- unsigned int lang;
+set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
{
switch (lang)
{
case DW_LANG_C89:
case DW_LANG_C:
- case DW_LANG_Fortran77:
- cu_language = language_c;
+ cu->language = language_c;
break;
case DW_LANG_C_plus_plus:
- cu_language = language_cplus;
+ cu->language = language_cplus;
+ break;
+ case DW_LANG_Fortran77:
+ case DW_LANG_Fortran90:
+ case DW_LANG_Fortran95:
+ cu->language = language_fortran;
break;
case DW_LANG_Mips_Assembler:
- cu_language = language_asm;
+ cu->language = language_asm;
+ break;
+ case DW_LANG_Java:
+ cu->language = language_java;
break;
case DW_LANG_Ada83:
+ case DW_LANG_Ada95:
case DW_LANG_Cobol74:
case DW_LANG_Cobol85:
-#if 0
- case DW_LANG_Fortran77: /* moved up top for now */
-#endif
- case DW_LANG_Fortran90:
case DW_LANG_Pascal83:
case DW_LANG_Modula2:
default:
- cu_language = language_unknown;
+ cu->language = language_minimal;
break;
}
- cu_language_defn = language_def (cu_language);
+ cu->language_defn = language_def (cu->language);
}
/* Return the named attribute or NULL if not there. */
static struct attribute *
-dwarf_attr (die, name)
- struct die_info *die;
- unsigned int name;
+dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
{
unsigned int i;
struct attribute *spec = NULL;
if (spec)
{
struct die_info *ref_die =
- follow_die_ref (dwarf2_get_ref_die_offset (spec));
+ follow_die_ref (dwarf2_get_ref_die_offset (spec, cu));
if (ref_die)
- return dwarf_attr (ref_die, name);
+ return dwarf2_attr (ref_die, name, cu);
}
-
+
return NULL;
}
-/* Decode the line number information for the compilation unit whose
- line number info is at OFFSET in the .debug_line section.
- The compilation directory of the file is passed in COMP_DIR. */
+/* Return non-zero iff the attribute NAME is defined for the given DIE,
+ and holds a non-zero value. This function should only be used for
+ DW_FORM_flag attributes. */
-struct filenames
+static int
+dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
{
- unsigned int num_files;
- struct fileinfo
- {
- char *name;
- unsigned int dir;
- unsigned int time;
- unsigned int size;
- }
- *files;
-};
+ struct attribute *attr = dwarf2_attr (die, name, cu);
+
+ return (attr && DW_UNSND (attr));
+}
-struct directories
+static int
+die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int num_dirs;
- char **dirs;
-};
+ /* A DIE is a declaration if it has a DW_AT_declaration attribute
+ which value is non-zero. However, we have to be careful with
+ DIEs having a DW_AT_specification attribute, because dwarf2_attr()
+ (via dwarf2_flag_true_p) follows this attribute. So we may
+ end up accidently finding a declaration attribute that belongs
+ to a different DIE referenced by the specification attribute,
+ even though the given DIE does not have a declaration attribute. */
+ return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
+ && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
+}
+
+/* Return the die giving the specification for DIE, if there is
+ one. */
+
+static struct die_info *
+die_specification (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu);
+
+ if (spec_attr == NULL)
+ return NULL;
+ else
+ return follow_die_ref (dwarf2_get_ref_die_offset (spec_attr, cu));
+}
+/* Free the line_header structure *LH, and any arrays and strings it
+ refers to. */
static void
-dwarf_decode_lines (offset, comp_dir, abfd)
- unsigned int offset;
- char *comp_dir;
- bfd *abfd;
+free_line_header (struct line_header *lh)
{
- char *line_ptr;
- char *line_end;
- struct line_head lh;
- struct cleanup *back_to;
- unsigned int i, bytes_read;
- char *cur_file, *cur_dir;
- unsigned char op_code, extended_op, adj_opcode;
+ if (lh->standard_opcode_lengths)
+ xfree (lh->standard_opcode_lengths);
+
+ /* Remember that all the lh->file_names[i].name pointers are
+ pointers into debug_line_buffer, and don't need to be freed. */
+ if (lh->file_names)
+ xfree (lh->file_names);
-#define FILE_ALLOC_CHUNK 5
-#define DIR_ALLOC_CHUNK 5
+ /* Similarly for the include directory names. */
+ if (lh->include_dirs)
+ xfree (lh->include_dirs);
+
+ xfree (lh);
+}
- struct filenames files;
- struct directories dirs;
- if (dwarf_line_buffer == NULL)
+/* Add an entry to LH's include directory table. */
+static void
+add_include_dir (struct line_header *lh, char *include_dir)
+{
+ /* Grow the array if necessary. */
+ if (lh->include_dirs_size == 0)
{
- complain (&dwarf2_missing_line_number_section);
- return;
+ lh->include_dirs_size = 1; /* for testing */
+ lh->include_dirs = xmalloc (lh->include_dirs_size
+ * sizeof (*lh->include_dirs));
+ }
+ else if (lh->num_include_dirs >= lh->include_dirs_size)
+ {
+ lh->include_dirs_size *= 2;
+ lh->include_dirs = xrealloc (lh->include_dirs,
+ (lh->include_dirs_size
+ * sizeof (*lh->include_dirs)));
+ }
+
+ lh->include_dirs[lh->num_include_dirs++] = include_dir;
+}
+
+
+/* Add an entry to LH's file name table. */
+static void
+add_file_name (struct line_header *lh,
+ char *name,
+ unsigned int dir_index,
+ unsigned int mod_time,
+ unsigned int length)
+{
+ struct file_entry *fe;
+
+ /* Grow the array if necessary. */
+ if (lh->file_names_size == 0)
+ {
+ lh->file_names_size = 1; /* for testing */
+ lh->file_names = xmalloc (lh->file_names_size
+ * sizeof (*lh->file_names));
+ }
+ else if (lh->num_file_names >= lh->file_names_size)
+ {
+ lh->file_names_size *= 2;
+ lh->file_names = xrealloc (lh->file_names,
+ (lh->file_names_size
+ * sizeof (*lh->file_names)));
+ }
+
+ fe = &lh->file_names[lh->num_file_names++];
+ fe->name = name;
+ fe->dir_index = dir_index;
+ fe->mod_time = mod_time;
+ fe->length = length;
+ fe->included_p = 0;
+}
+
+
+/* Read the statement program header starting at OFFSET in
+ .debug_line, according to the endianness of ABFD. Return a pointer
+ to a struct line_header, allocated using xmalloc.
+
+ NOTE: the strings in the include directory and file name tables of
+ the returned object point into debug_line_buffer, and must not be
+ freed. */
+static struct line_header *
+dwarf_decode_line_header (unsigned int offset, bfd *abfd,
+ struct dwarf2_cu *cu)
+{
+ struct cleanup *back_to;
+ struct line_header *lh;
+ char *line_ptr;
+ int bytes_read;
+ int i;
+ char *cur_dir, *cur_file;
+
+ if (dwarf2_per_objfile->line_buffer == NULL)
+ {
+ complaint (&symfile_complaints, "missing .debug_line section");
+ return 0;
}
- files.num_files = 0;
- files.files = NULL;
+ /* Make sure that at least there's room for the total_length field. That
+ could be 12 bytes long, but we're just going to fudge that. */
+ if (offset + 4 >= dwarf2_per_objfile->line_size)
+ {
+ dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ return 0;
+ }
- dirs.num_dirs = 0;
- dirs.dirs = NULL;
+ lh = xmalloc (sizeof (*lh));
+ memset (lh, 0, sizeof (*lh));
+ back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
+ (void *) lh);
- line_ptr = dwarf_line_buffer + offset;
+ line_ptr = dwarf2_per_objfile->line_buffer + offset;
- /* read in the prologue */
- lh.total_length = read_4_bytes (abfd, line_ptr);
- line_ptr += 4;
- line_end = line_ptr + lh.total_length;
- lh.version = read_2_bytes (abfd, line_ptr);
+ /* read in the header */
+ lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read);
+ line_ptr += bytes_read;
+ if (line_ptr + lh->total_length > (dwarf2_per_objfile->line_buffer
+ + dwarf2_per_objfile->line_size))
+ {
+ dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ return 0;
+ }
+ lh->statement_program_end = line_ptr + lh->total_length;
+ lh->version = read_2_bytes (abfd, line_ptr);
line_ptr += 2;
- lh.prologue_length = read_4_bytes (abfd, line_ptr);
- line_ptr += 4;
- lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
+ lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read);
+ line_ptr += bytes_read;
+ lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
line_ptr += 1;
- lh.default_is_stmt = read_1_byte (abfd, line_ptr);
+ lh->default_is_stmt = read_1_byte (abfd, line_ptr);
line_ptr += 1;
- lh.line_base = read_1_signed_byte (abfd, line_ptr);
+ lh->line_base = read_1_signed_byte (abfd, line_ptr);
line_ptr += 1;
- lh.line_range = read_1_byte (abfd, line_ptr);
+ lh->line_range = read_1_byte (abfd, line_ptr);
line_ptr += 1;
- lh.opcode_base = read_1_byte (abfd, line_ptr);
+ lh->opcode_base = read_1_byte (abfd, line_ptr);
line_ptr += 1;
- lh.standard_opcode_lengths = (unsigned char *)
- xmalloc (lh.opcode_base * sizeof (unsigned char));
- back_to = make_cleanup (free_current_contents, &lh.standard_opcode_lengths);
+ lh->standard_opcode_lengths
+ = (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char));
- lh.standard_opcode_lengths[0] = 1;
- for (i = 1; i < lh.opcode_base; ++i)
+ lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
+ for (i = 1; i < lh->opcode_base; ++i)
{
- lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
+ lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
line_ptr += 1;
}
while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
{
line_ptr += bytes_read;
- if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
- {
- dirs.dirs = (char **)
- xrealloc (dirs.dirs,
- (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
- if (dirs.num_dirs == 0)
- make_cleanup (free_current_contents, &dirs.dirs);
- }
- dirs.dirs[dirs.num_dirs++] = cur_dir;
+ add_include_dir (lh, cur_dir);
}
line_ptr += bytes_read;
/* Read file name table */
while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
{
+ unsigned int dir_index, mod_time, length;
+
line_ptr += bytes_read;
- if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
- {
- files.files = (struct fileinfo *)
- xrealloc (files.files,
- (files.num_files + FILE_ALLOC_CHUNK)
- * sizeof (struct fileinfo));
- if (files.num_files == 0)
- make_cleanup (free_current_contents, &files.files);
- }
- files.files[files.num_files].name = cur_file;
- files.files[files.num_files].dir =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
- files.files[files.num_files].time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
- files.files[files.num_files].size =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
- files.num_files++;
+
+ add_file_name (lh, cur_file, dir_index, mod_time, length);
}
line_ptr += bytes_read;
+ lh->statement_program_start = line_ptr;
+
+ if (line_ptr > (dwarf2_per_objfile->line_buffer
+ + dwarf2_per_objfile->line_size))
+ complaint (&symfile_complaints,
+ "line number info header doesn't fit in `.debug_line' section");
+
+ discard_cleanups (back_to);
+ return lh;
+}
+
+/* This function exists to work around a bug in certain compilers
+ (particularly GCC 2.95), in which the first line number marker of a
+ function does not show up until after the prologue, right before
+ the second line number marker. This function shifts ADDRESS down
+ to the beginning of the function if necessary, and is called on
+ addresses passed to record_line. */
+
+static CORE_ADDR
+check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
+{
+ struct function_range *fn;
+
+ /* Find the function_range containing address. */
+ if (!cu->first_fn)
+ return address;
+
+ if (!cu->cached_fn)
+ cu->cached_fn = cu->first_fn;
+
+ fn = cu->cached_fn;
+ while (fn)
+ if (fn->lowpc <= address && fn->highpc > address)
+ goto found;
+ else
+ fn = fn->next;
+
+ fn = cu->first_fn;
+ while (fn && fn != cu->cached_fn)
+ if (fn->lowpc <= address && fn->highpc > address)
+ goto found;
+ else
+ fn = fn->next;
+
+ return address;
+
+ found:
+ if (fn->seen_line)
+ return address;
+ if (address != fn->lowpc)
+ complaint (&symfile_complaints,
+ "misplaced first line number at 0x%lx for '%s'",
+ (unsigned long) address, fn->name);
+ fn->seen_line = 1;
+ return fn->lowpc;
+}
+
+/* Decode the Line Number Program (LNP) for the given line_header
+ structure and CU. The actual information extracted and the type
+ of structures created from the LNP depends on the value of PST.
+
+ 1. If PST is NULL, then this procedure uses the data from the program
+ to create all necessary symbol tables, and their linetables.
+ The compilation directory of the file is passed in COMP_DIR,
+ and must not be NULL.
+
+ 2. If PST is not NULL, this procedure reads the program to determine
+ the list of files included by the unit represented by PST, and
+ builds all the associated partial symbol tables. In this case,
+ the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
+ is not used to compute the full name of the symtab, and therefore
+ omitting it when building the partial symtab does not introduce
+ the potential for inconsistency - a partial symtab and its associated
+ symbtab having a different fullname -). */
+
+static void
+dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
+ struct dwarf2_cu *cu, struct partial_symtab *pst)
+{
+ char *line_ptr;
+ char *line_end;
+ unsigned int bytes_read;
+ unsigned char op_code, extended_op, adj_opcode;
+ CORE_ADDR baseaddr;
+ struct objfile *objfile = cu->objfile;
+ const int decode_for_pst_p = (pst != NULL);
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ line_ptr = lh->statement_program_start;
+ line_end = lh->statement_program_end;
/* Read the statement sequences until there's nothing left. */
while (line_ptr < line_end)
{
/* state machine registers */
- unsigned int address = 0;
+ CORE_ADDR address = 0;
unsigned int file = 1;
unsigned int line = 1;
unsigned int column = 0;
- int is_stmt = lh.default_is_stmt;
+ int is_stmt = lh->default_is_stmt;
int basic_block = 0;
int end_sequence = 0;
- /* Start a subfile for the current file of the state machine. */
- if (files.num_files >= file)
+ if (!decode_for_pst_p && lh->num_file_names >= file)
{
- /* The file and directory tables are 0 based, the references
- are 1 based. */
- dwarf2_start_subfile (files.files[file - 1].name,
- (files.files[file - 1].dir
- ? dirs.dirs[files.files[file - 1].dir - 1]
- : comp_dir));
+ /* Start a subfile for the current file of the state machine. */
+ /* lh->include_dirs and lh->file_names are 0-based, but the
+ directory and file name numbers in the statement program
+ are 1-based. */
+ struct file_entry *fe = &lh->file_names[file - 1];
+ char *dir;
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ else
+ dir = comp_dir;
+ dwarf2_start_subfile (fe->name, dir);
}
/* Decode the table. */
- while (! end_sequence)
+ while (!end_sequence)
{
op_code = read_1_byte (abfd, line_ptr);
line_ptr += 1;
- switch (op_code)
+
+ if (op_code >= lh->opcode_base)
+ { /* Special operand. */
+ adj_opcode = op_code - lh->opcode_base;
+ address += (adj_opcode / lh->line_range)
+ * lh->minimum_instruction_length;
+ line += lh->line_base + (adj_opcode % lh->line_range);
+ if (!decode_for_pst_p)
+ {
+ /* append row to matrix using current values */
+ record_line (current_subfile, line,
+ check_cu_functions (address, cu));
+ }
+ basic_block = 1;
+ }
+ else switch (op_code)
{
case DW_LNS_extended_op:
line_ptr += 1; /* ignore length */
{
case DW_LNE_end_sequence:
end_sequence = 1;
- record_line (current_subfile, line, address);
+ if (!decode_for_pst_p)
+ record_line (current_subfile, 0, address);
break;
case DW_LNE_set_address:
- address = read_address (abfd, line_ptr) + baseaddr;
- line_ptr += address_size;
+ address = read_address (abfd, line_ptr, cu, &bytes_read);
+ line_ptr += bytes_read;
+ address += baseaddr;
break;
case DW_LNE_define_file:
- cur_file = read_string (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
- {
- files.files = (struct fileinfo *)
- xrealloc (files.files,
- (files.num_files + FILE_ALLOC_CHUNK)
- * sizeof (struct fileinfo));
- if (files.num_files == 0)
- make_cleanup (free_current_contents, &files.files);
- }
- files.files[files.num_files].name = cur_file;
- files.files[files.num_files].dir =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.files[files.num_files].time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.files[files.num_files].size =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.num_files++;
+ {
+ char *cur_file;
+ unsigned int dir_index, mod_time, length;
+
+ cur_file = read_string (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ dir_index =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ mod_time =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ length =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ add_file_name (lh, cur_file, dir_index, mod_time, length);
+ }
break;
default:
- complain (&dwarf2_mangled_line_number_section);
- goto done;
+ complaint (&symfile_complaints,
+ "mangled .debug_line section");
+ return;
}
break;
case DW_LNS_copy:
- record_line (current_subfile, line, address);
+ if (!decode_for_pst_p)
+ record_line (current_subfile, line,
+ check_cu_functions (address, cu));
basic_block = 0;
break;
case DW_LNS_advance_pc:
- address += lh.minimum_instruction_length
+ address += lh->minimum_instruction_length
* read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
break;
line_ptr += bytes_read;
break;
case DW_LNS_set_file:
- /* The file and directory tables are 0 based, the references
- are 1 based. */
- file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- dwarf2_start_subfile
- (files.files[file - 1].name,
- (files.files[file - 1].dir
- ? dirs.dirs[files.files[file - 1].dir - 1]
- : comp_dir));
+ {
+ /* lh->include_dirs and lh->file_names are 0-based,
+ but the directory and file name numbers in the
+ statement program are 1-based. */
+ struct file_entry *fe;
+ char *dir;
+ file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ fe = &lh->file_names[file - 1];
+ fe->included_p = 1;
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ else
+ dir = comp_dir;
+ if (!decode_for_pst_p)
+ dwarf2_start_subfile (fe->name, dir);
+ }
break;
case DW_LNS_set_column:
column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
case DW_LNS_set_basic_block:
basic_block = 1;
break;
+ /* Add to the address register of the state machine the
+ address increment value corresponding to special opcode
+ 255. Ie, this value is scaled by the minimum instruction
+ length since special opcode 255 would have scaled the
+ the increment. */
case DW_LNS_const_add_pc:
- address += (255 - lh.opcode_base) / lh.line_range;
+ address += (lh->minimum_instruction_length
+ * ((255 - lh->opcode_base) / lh->line_range));
break;
case DW_LNS_fixed_advance_pc:
address += read_2_bytes (abfd, line_ptr);
line_ptr += 2;
break;
- default: /* special operand */
- adj_opcode = op_code - lh.opcode_base;
- address += (adj_opcode / lh.line_range)
- * lh.minimum_instruction_length;
- line += lh.line_base + (adj_opcode % lh.line_range);
- /* append row to matrix using current values */
- record_line (current_subfile, line, address);
- basic_block = 1;
+ default:
+ { /* Unknown standard opcode, ignore it. */
+ int i;
+ for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
+ {
+ (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ }
+ }
}
}
}
-done:
- do_cleanups (back_to);
+
+ if (decode_for_pst_p)
+ {
+ int file_index;
+
+ /* Now that we're done scanning the Line Header Program, we can
+ create the psymtab of each included file. */
+ for (file_index = 0; file_index < lh->num_file_names; file_index++)
+ if (lh->file_names[file_index].included_p == 1)
+ {
+ char *include_name = lh->file_names [file_index].name;
+
+ if (strcmp (include_name, pst->filename) != 0)
+ dwarf2_create_include_psymtab (include_name, pst, objfile);
+ }
+ }
}
/* Start a subfile for DWARF. FILENAME is the name of the file and
/srcdir and compiling it with Irix6.2 cc in /compdir using a filename
of /srcdir/list0.c yields the following debugging information for list0.c:
- DW_AT_name: /srcdir/list0.c
- DW_AT_comp_dir: /compdir
- files.files[0].name: list0.h
- files.files[0].dir: /srcdir
- files.files[1].name: list0.c
- files.files[1].dir: /srcdir
+ DW_AT_name: /srcdir/list0.c
+ DW_AT_comp_dir: /compdir
+ files.files[0].name: list0.h
+ files.files[0].dir: /srcdir
+ files.files[1].name: list0.c
+ files.files[1].dir: /srcdir
The line number information for list0.c has to end up in a single
subfile, so that `break /srcdir/list0.c:1' works as expected. */
static void
-dwarf2_start_subfile (filename, dirname)
- char *filename;
- char *dirname;
+dwarf2_start_subfile (char *filename, char *dirname)
{
/* If the filename isn't absolute, try to match an existing subfile
with the full pathname. */
- if (*filename != '/' && dirname != NULL)
+ if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
{
struct subfile *subfile;
char *fullname = concat (dirname, "/", filename, NULL);
for (subfile = subfiles; subfile; subfile = subfile->next)
{
- if (STREQ (subfile->name, fullname))
+ if (FILENAME_CMP (subfile->name, fullname) == 0)
{
current_subfile = subfile;
- free (fullname);
+ xfree (fullname);
return;
}
}
- free (fullname);
+ xfree (fullname);
}
start_subfile (filename, dirname);
}
+static void
+var_decode_location (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+
+ /* NOTE drow/2003-01-30: There used to be a comment and some special
+ code here to turn a symbol with DW_AT_external and a
+ SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
+ necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
+ with some versions of binutils) where shared libraries could have
+ relocations against symbols in their debug information - the
+ minimal symbol would have the right address, but the debug info
+ would not. It's no longer necessary, because we will explicitly
+ apply relocations when we read in the debug information now. */
+
+ /* A DW_AT_location attribute with no contents indicates that a
+ variable has been optimized away. */
+ if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
+ {
+ SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
+ return;
+ }
+
+ /* Handle one degenerate form of location expression specially, to
+ preserve GDB's previous behavior when section offsets are
+ specified. If this is just a DW_OP_addr then mark this symbol
+ as LOC_STATIC. */
+
+ if (attr_form_is_block (attr)
+ && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
+ && DW_BLOCK (attr)->data[0] == DW_OP_addr)
+ {
+ int dummy;
+
+ SYMBOL_VALUE_ADDRESS (sym) =
+ read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
+ fixup_symbol_section (sym, objfile);
+ SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
+ SYMBOL_SECTION (sym));
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ return;
+ }
+
+ /* NOTE drow/2002-01-30: It might be worthwhile to have a static
+ expression evaluator, and use LOC_COMPUTED only when necessary
+ (i.e. when the value of a register or memory location is
+ referenced, or a thread-local block, etc.). Then again, it might
+ not be worthwhile. I'm assuming that it isn't unless performance
+ or memory numbers show me otherwise. */
+
+ dwarf2_symbol_mark_computed (attr, sym, cu);
+ SYMBOL_CLASS (sym) = LOC_COMPUTED;
+}
+
/* Given a pointer to a DWARF information entry, figure out if we need
to make a symbol table entry for it, and if so, create a new entry
and return a pointer to it.
If TYPE is NULL, determine symbol type from the die, otherwise
- used the passed type.
- */
+ used the passed type. */
static struct symbol *
-new_symbol (die, type, objfile)
- struct die_info *die;
- struct type *type;
- struct objfile *objfile;
+new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
struct symbol *sym = NULL;
char *name;
struct attribute *attr = NULL;
struct attribute *attr2 = NULL;
- CORE_ADDR addr;
+ CORE_ADDR baseaddr;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ if (die->tag != DW_TAG_namespace)
+ name = dwarf2_linkage_name (die, cu);
+ else
+ name = TYPE_NAME (type);
- name = dwarf2_linkage_name (die);
if (name)
{
- sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
+ sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
sizeof (struct symbol));
OBJSTAT (objfile, n_syms++);
memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
- &objfile->symbol_obstack);
+
+ /* Cache this symbol's name and the name's demangled form (if any). */
+ SYMBOL_LANGUAGE (sym) = cu->language;
+ SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
/* Default assumptions.
- Use the passed type or decode it from the die. */
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ Use the passed type or decode it from the die. */
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
SYMBOL_CLASS (sym) = LOC_STATIC;
if (type != NULL)
SYMBOL_TYPE (sym) = type;
else
- SYMBOL_TYPE (sym) = die_type (die, objfile);
- attr = dwarf_attr (die, DW_AT_decl_line);
+ SYMBOL_TYPE (sym) = die_type (die, cu);
+ attr = dwarf2_attr (die, DW_AT_decl_line, cu);
if (attr)
{
SYMBOL_LINE (sym) = DW_UNSND (attr);
}
-
- /* If this symbol is from a C++ compilation, then attempt to
- cache the demangled form for future reference. This is a
- typical time versus space tradeoff, that was decided in favor
- of time because it sped up C++ symbol lookups by a factor of
- about 20. */
-
- SYMBOL_LANGUAGE (sym) = cu_language;
- SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
switch (die->tag)
{
case DW_TAG_label:
- attr = dwarf_attr (die, DW_AT_low_pc);
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
if (attr)
{
SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
/* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
finish_block. */
SYMBOL_CLASS (sym) = LOC_BLOCK;
- attr2 = dwarf_attr (die, DW_AT_external);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
if (attr2 && (DW_UNSND (attr2) != 0))
{
add_symbol_to_list (sym, &global_symbols);
}
else
{
- add_symbol_to_list (sym, list_in_scope);
+ add_symbol_to_list (sym, cu->list_in_scope);
}
break;
case DW_TAG_variable:
TARGET_INT_BIT / HOST_CHAR_BIT, 0,
"<variable, no debug info>",
objfile);
- attr = dwarf_attr (die, DW_AT_const_value);
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
{
- dwarf2_const_value (attr, sym, objfile);
- attr2 = dwarf_attr (die, DW_AT_external);
+ dwarf2_const_value (attr, sym, cu);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
if (attr2 && (DW_UNSND (attr2) != 0))
add_symbol_to_list (sym, &global_symbols);
else
- add_symbol_to_list (sym, list_in_scope);
+ add_symbol_to_list (sym, cu->list_in_scope);
break;
}
- attr = dwarf_attr (die, DW_AT_location);
+ attr = dwarf2_attr (die, DW_AT_location, cu);
if (attr)
{
- attr2 = dwarf_attr (die, DW_AT_external);
+ var_decode_location (attr, sym, cu);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
if (attr2 && (DW_UNSND (attr2) != 0))
- {
- SYMBOL_VALUE_ADDRESS (sym) =
- decode_locdesc (DW_BLOCK (attr), objfile);
- add_symbol_to_list (sym, &global_symbols);
-
- /* In shared libraries the address of the variable
- in the location descriptor might still be relocatable,
- so its value could be zero.
- Enter the symbol as a LOC_UNRESOLVED symbol, if its
- value is zero, the address of the variable will then
- be determined from the minimal symbol table whenever
- the variable is referenced. */
- if (SYMBOL_VALUE_ADDRESS (sym))
- {
- SYMBOL_VALUE_ADDRESS (sym) += baseaddr;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- }
- else
- SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
- }
+ add_symbol_to_list (sym, &global_symbols);
else
- {
- SYMBOL_VALUE (sym) = addr =
- decode_locdesc (DW_BLOCK (attr), objfile);
- add_symbol_to_list (sym, list_in_scope);
- if (optimized_out)
- {
- SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
- }
- else if (isreg)
- {
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- }
- else if (offreg)
- {
- SYMBOL_CLASS (sym) = LOC_BASEREG;
- SYMBOL_BASEREG (sym) = basereg;
- }
- else if (islocal)
- {
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- }
- else
- {
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE_ADDRESS (sym) = addr + baseaddr;
- }
- }
+ add_symbol_to_list (sym, cu->list_in_scope);
}
else
{
/* We do not know the address of this symbol.
- If it is an external symbol and we have type information
- for it, enter the symbol as a LOC_UNRESOLVED symbol.
- The address of the variable will then be determined from
- the minimal symbol table whenever the variable is
- referenced. */
- attr2 = dwarf_attr (die, DW_AT_external);
+ If it is an external symbol and we have type information
+ for it, enter the symbol as a LOC_UNRESOLVED symbol.
+ The address of the variable will then be determined from
+ the minimal symbol table whenever the variable is
+ referenced. */
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
if (attr2 && (DW_UNSND (attr2) != 0)
- && dwarf_attr (die, DW_AT_type) != NULL)
+ && dwarf2_attr (die, DW_AT_type, cu) != NULL)
{
SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
add_symbol_to_list (sym, &global_symbols);
}
break;
case DW_TAG_formal_parameter:
- attr = dwarf_attr (die, DW_AT_location);
+ attr = dwarf2_attr (die, DW_AT_location, cu);
if (attr)
{
- SYMBOL_VALUE (sym) = decode_locdesc (DW_BLOCK (attr), objfile);
- if (isreg)
- {
- SYMBOL_CLASS (sym) = LOC_REGPARM;
- }
- else if (offreg)
- {
- SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
- SYMBOL_BASEREG (sym) = basereg;
- }
- else
- {
- SYMBOL_CLASS (sym) = LOC_ARG;
- }
+ var_decode_location (attr, sym, cu);
+ /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
+ if (SYMBOL_CLASS (sym) == LOC_COMPUTED)
+ SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG;
}
- attr = dwarf_attr (die, DW_AT_const_value);
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
{
- dwarf2_const_value (attr, sym, objfile);
+ dwarf2_const_value (attr, sym, cu);
}
- add_symbol_to_list (sym, list_in_scope);
+ add_symbol_to_list (sym, cu->list_in_scope);
break;
case DW_TAG_unspecified_parameters:
/* From varargs functions; gdb doesn't seem to have any
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- add_symbol_to_list (sym, list_in_scope);
+ SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
+
+ /* Make sure that the symbol includes appropriate enclosing
+ classes/namespaces in its name. These are calculated in
+ read_structure_type, and the correct name is saved in
+ the type. */
- /* The semantics of C++ state that "struct foo { ... }" also
- defines a typedef for "foo". Synthesize a typedef symbol so
- that "ptype foo" works as expected. */
- if (cu_language == language_cplus)
+ if (cu->language == language_cplus)
{
- struct symbol *typedef_sym = (struct symbol *)
- obstack_alloc (&objfile->symbol_obstack,
- sizeof (struct symbol));
- *typedef_sym = *sym;
- SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym)) =
- obsavestring (SYMBOL_NAME (sym),
- strlen (SYMBOL_NAME (sym)),
- &objfile->type_obstack);
- add_symbol_to_list (typedef_sym, list_in_scope);
+ struct type *type = SYMBOL_TYPE (sym);
+
+ if (TYPE_TAG_NAME (type) != NULL)
+ {
+ /* FIXME: carlton/2003-11-10: Should this use
+ SYMBOL_SET_NAMES instead? (The same problem also
+ arises further down in this function.) */
+ /* The type's name is already allocated along with
+ this objfile, so we don't need to duplicate it
+ for the symbol. */
+ SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
+ }
}
+
+ {
+ /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
+ really ever be static objects: otherwise, if you try
+ to, say, break of a class's method and you're in a file
+ which doesn't mention that class, it won't work unless
+ the check for all static symbols in lookup_symbol_aux
+ saves you. See the OtherFileClass tests in
+ gdb.c++/namespace.exp. */
+
+ struct pending **list_to_add;
+
+ list_to_add = (cu->list_in_scope == &file_symbols
+ && cu->language == language_cplus
+ ? &global_symbols : cu->list_in_scope);
+
+ add_symbol_to_list (sym, list_to_add);
+
+ /* The semantics of C++ state that "struct foo { ... }" also
+ defines a typedef for "foo". Synthesize a typedef symbol so
+ that "ptype foo" works as expected. */
+ if (cu->language == language_cplus)
+ {
+ struct symbol *typedef_sym = (struct symbol *)
+ obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct symbol));
+ *typedef_sym = *sym;
+ SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
+ /* The symbol's name is already allocated along with
+ this objfile, so we don't need to duplicate it for
+ the type. */
+ if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
+ TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NATURAL_NAME (sym);
+ add_symbol_to_list (typedef_sym, list_to_add);
+ }
+ }
break;
case DW_TAG_typedef:
+ if (processing_has_namespace_info
+ && processing_current_prefix[0] != '\0')
+ {
+ SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack,
+ processing_current_prefix,
+ "::",
+ name);
+ }
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ add_symbol_to_list (sym, cu->list_in_scope);
+ break;
case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, list_in_scope);
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ add_symbol_to_list (sym, cu->list_in_scope);
break;
case DW_TAG_enumerator:
- attr = dwarf_attr (die, DW_AT_const_value);
+ if (processing_has_namespace_info
+ && processing_current_prefix[0] != '\0')
+ {
+ SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack,
+ processing_current_prefix,
+ "::",
+ name);
+ }
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
{
- dwarf2_const_value (attr, sym, objfile);
+ dwarf2_const_value (attr, sym, cu);
}
- add_symbol_to_list (sym, list_in_scope);
+ {
+ /* NOTE: carlton/2003-11-10: See comment above in the
+ DW_TAG_class_type, etc. block. */
+
+ struct pending **list_to_add;
+
+ list_to_add = (cu->list_in_scope == &file_symbols
+ && cu->language == language_cplus
+ ? &global_symbols : cu->list_in_scope);
+
+ add_symbol_to_list (sym, list_to_add);
+ }
+ break;
+ case DW_TAG_namespace:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ add_symbol_to_list (sym, &global_symbols);
break;
default:
/* Not a tag we recognize. Hopefully we aren't processing
trash data, but since we must specifically ignore things
we don't recognize, there is nothing else we should do at
this point. */
- complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag));
+ complaint (&symfile_complaints, "unsupported tag: '%s'",
+ dwarf_tag_name (die->tag));
break;
}
}
/* Copy constant value from an attribute to a symbol. */
static void
-dwarf2_const_value (attr, sym, objfile)
- struct attribute *attr;
- struct symbol *sym;
- struct objfile *objfile;
+dwarf2_const_value (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
struct dwarf_block *blk;
switch (attr->form)
{
case DW_FORM_addr:
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != (unsigned int) address_size)
- complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
- address_size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
+ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
+ dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
+ cu_header->addr_size,
+ TYPE_LENGTH (SYMBOL_TYPE
+ (sym)));
SYMBOL_VALUE_BYTES (sym) = (char *)
- obstack_alloc (&objfile->symbol_obstack, address_size);
- store_address (SYMBOL_VALUE_BYTES (sym), address_size, DW_ADDR (attr));
+ obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
+ /* NOTE: cagney/2003-05-09: In-lined store_address call with
+ it's body - store_unsigned_integer. */
+ store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
+ DW_ADDR (attr));
SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
break;
case DW_FORM_block1:
case DW_FORM_block:
blk = DW_BLOCK (attr);
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
- complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
- blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
+ dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
+ blk->size,
+ TYPE_LENGTH (SYMBOL_TYPE
+ (sym)));
SYMBOL_VALUE_BYTES (sym) = (char *)
- obstack_alloc (&objfile->symbol_obstack, blk->size);
+ obstack_alloc (&objfile->objfile_obstack, blk->size);
memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
break;
+
+ /* The DW_AT_const_value attributes are supposed to carry the
+ symbol's value "represented as it would be on the target
+ architecture." By the time we get here, it's already been
+ converted to host endianness, so we just need to sign- or
+ zero-extend it as appropriate. */
+ case DW_FORM_data1:
+ dwarf2_const_value_data (attr, sym, 8);
+ break;
case DW_FORM_data2:
+ dwarf2_const_value_data (attr, sym, 16);
+ break;
case DW_FORM_data4:
+ dwarf2_const_value_data (attr, sym, 32);
+ break;
case DW_FORM_data8:
- case DW_FORM_data1:
+ dwarf2_const_value_data (attr, sym, 64);
+ break;
+
case DW_FORM_sdata:
+ SYMBOL_VALUE (sym) = DW_SND (attr);
+ SYMBOL_CLASS (sym) = LOC_CONST;
+ break;
+
case DW_FORM_udata:
SYMBOL_VALUE (sym) = DW_UNSND (attr);
SYMBOL_CLASS (sym) = LOC_CONST;
break;
+
default:
- complain (&dwarf2_unsupported_const_value_attr,
- dwarf_form_name (attr->form));
+ complaint (&symfile_complaints,
+ "unsupported const value attribute form: '%s'",
+ dwarf_form_name (attr->form));
SYMBOL_VALUE (sym) = 0;
SYMBOL_CLASS (sym) = LOC_CONST;
break;
}
}
+
+/* Given an attr with a DW_FORM_dataN value in host byte order, sign-
+ or zero-extend it as appropriate for the symbol's type. */
+static void
+dwarf2_const_value_data (struct attribute *attr,
+ struct symbol *sym,
+ int bits)
+{
+ LONGEST l = DW_UNSND (attr);
+
+ if (bits < sizeof (l) * 8)
+ {
+ if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
+ l &= ((LONGEST) 1 << bits) - 1;
+ else
+ l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
+ }
+
+ SYMBOL_VALUE (sym) = l;
+ SYMBOL_CLASS (sym) = LOC_CONST;
+}
+
+
/* Return the type of the die in question using its DW_AT_type attribute. */
static struct type *
-die_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+die_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct type *type;
struct attribute *type_attr;
struct die_info *type_die;
unsigned int ref;
- type_attr = dwarf_attr (die, DW_AT_type);
+ type_attr = dwarf2_attr (die, DW_AT_type, cu);
if (!type_attr)
{
/* A missing DW_AT_type represents a void type. */
- return dwarf2_fundamental_type (objfile, FT_VOID);
+ return dwarf2_fundamental_type (cu->objfile, FT_VOID, cu);
}
else
{
- ref = dwarf2_get_ref_die_offset (type_attr);
+ ref = dwarf2_get_ref_die_offset (type_attr, cu);
type_die = follow_die_ref (ref);
if (!type_die)
{
- error ("Dwarf Error: Cannot find referent at offset %d.", ref);
+ error ("Dwarf Error: Cannot find referent at offset %d [in module %s]",
+ ref, cu->objfile->name);
return NULL;
}
}
- type = tag_type_to_type (type_die, objfile);
+ type = tag_type_to_type (type_die, cu);
if (!type)
{
dump_die (type_die);
- error ("Dwarf Error: Problem turning type die at offset into gdb type.");
+ error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]",
+ cu->objfile->name);
}
return type;
}
DW_AT_containing_type attribute. */
static struct type *
-die_containing_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct type *type = NULL;
struct attribute *type_attr;
struct die_info *type_die = NULL;
unsigned int ref;
- type_attr = dwarf_attr (die, DW_AT_containing_type);
+ type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
if (type_attr)
{
- ref = dwarf2_get_ref_die_offset (type_attr);
+ ref = dwarf2_get_ref_die_offset (type_attr, cu);
type_die = follow_die_ref (ref);
if (!type_die)
{
- error ("Dwarf Error: Cannot find referent at offset %d.", ref);
+ error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref,
+ cu->objfile->name);
return NULL;
}
- type = tag_type_to_type (type_die, objfile);
+ type = tag_type_to_type (type_die, cu);
}
if (!type)
{
if (type_die)
dump_die (type_die);
- error ("Dwarf Error: Problem turning containing type into gdb type.");
+ error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]",
+ cu->objfile->name);
}
return type;
}
#if 0
static struct type *
-type_at_offset (offset, objfile)
- unsigned int offset;
- struct objfile *objfile;
+type_at_offset (unsigned int offset, struct dwarf2_cu *cu)
{
struct die_info *die;
struct type *type;
error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
return NULL;
}
- type = tag_type_to_type (die, objfile);
+ type = tag_type_to_type (die, cu);
return type;
}
#endif
static struct type *
-tag_type_to_type (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
{
if (die->type)
{
}
else
{
- read_type_die (die, objfile);
+ read_type_die (die, cu);
if (!die->type)
{
dump_die (die);
- error ("Dwarf Error: Cannot find type of die.");
+ error ("Dwarf Error: Cannot find type of die [in module %s]",
+ cu->objfile->name);
}
return die->type;
}
}
static void
-read_type_die (die, objfile)
- struct die_info *die;
- struct objfile *objfile;
+read_type_die (struct die_info *die, struct dwarf2_cu *cu)
{
+ char *prefix = determine_prefix (die, cu);
+ const char *old_prefix = processing_current_prefix;
+ struct cleanup *back_to = make_cleanup (xfree, prefix);
+ processing_current_prefix = prefix;
+
switch (die->tag)
{
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
- read_structure_scope (die, objfile);
+ read_structure_type (die, cu);
break;
case DW_TAG_enumeration_type:
- read_enumeration (die, objfile);
+ read_enumeration_type (die, cu);
break;
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
- read_subroutine_type (die, objfile);
+ read_subroutine_type (die, cu);
break;
case DW_TAG_array_type:
- read_array_type (die, objfile);
+ read_array_type (die, cu);
break;
case DW_TAG_pointer_type:
- read_tag_pointer_type (die, objfile);
+ read_tag_pointer_type (die, cu);
break;
case DW_TAG_ptr_to_member_type:
- read_tag_ptr_to_member_type (die, objfile);
+ read_tag_ptr_to_member_type (die, cu);
break;
case DW_TAG_reference_type:
- read_tag_reference_type (die, objfile);
+ read_tag_reference_type (die, cu);
break;
case DW_TAG_const_type:
- read_tag_const_type (die, objfile);
+ read_tag_const_type (die, cu);
break;
case DW_TAG_volatile_type:
- read_tag_volatile_type (die, objfile);
+ read_tag_volatile_type (die, cu);
break;
case DW_TAG_string_type:
- read_tag_string_type (die, objfile);
+ read_tag_string_type (die, cu);
break;
case DW_TAG_typedef:
- read_typedef (die, objfile);
+ read_typedef (die, cu);
+ break;
+ case DW_TAG_subrange_type:
+ read_subrange_type (die, cu);
break;
case DW_TAG_base_type:
- read_base_type (die, objfile);
+ read_base_type (die, cu);
break;
default:
- complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag));
+ complaint (&symfile_complaints, "unexepected tag in read_type_die: '%s'",
+ dwarf_tag_name (die->tag));
break;
}
+
+ processing_current_prefix = old_prefix;
+ do_cleanups (back_to);
+}
+
+/* Return the name of the namespace/class that DIE is defined within,
+ or "" if we can't tell. The caller should xfree the result. */
+
+/* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
+ therein) for an example of how to use this function to deal with
+ DW_AT_specification. */
+
+static char *
+determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *parent;
+
+ if (cu->language != language_cplus)
+ return NULL;
+
+ parent = die->parent;
+
+ if (parent == NULL)
+ {
+ return xstrdup ("");
+ }
+ else
+ {
+ switch (parent->tag) {
+ case DW_TAG_namespace:
+ {
+ /* FIXME: carlton/2004-03-05: Should I follow extension dies
+ before doing this check? */
+ if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
+ {
+ return xstrdup (TYPE_TAG_NAME (parent->type));
+ }
+ else
+ {
+ int dummy;
+ char *parent_prefix = determine_prefix (parent, cu);
+ char *retval = typename_concat (parent_prefix,
+ namespace_name (parent, &dummy,
+ cu));
+ xfree (parent_prefix);
+ return retval;
+ }
+ }
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_structure_type:
+ {
+ if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
+ {
+ return xstrdup (TYPE_TAG_NAME (parent->type));
+ }
+ else
+ {
+ const char *old_prefix = processing_current_prefix;
+ char *new_prefix = determine_prefix (parent, cu);
+ char *retval;
+
+ processing_current_prefix = new_prefix;
+ retval = determine_class_name (parent, cu);
+ processing_current_prefix = old_prefix;
+
+ xfree (new_prefix);
+ return retval;
+ }
+ }
+ default:
+ return determine_prefix (parent, cu);
+ }
+ }
+}
+
+/* Return a newly-allocated string formed by concatenating PREFIX,
+ "::", and SUFFIX, except that if PREFIX is NULL or the empty
+ string, just return a copy of SUFFIX. */
+
+static char *
+typename_concat (const char *prefix, const char *suffix)
+{
+ if (prefix == NULL || prefix[0] == '\0')
+ return xstrdup (suffix);
+ else
+ {
+ char *retval = xmalloc (strlen (prefix) + 2 + strlen (suffix) + 1);
+
+ strcpy (retval, prefix);
+ strcat (retval, "::");
+ strcat (retval, suffix);
+
+ return retval;
+ }
}
static struct type *
-dwarf_base_type (encoding, size, objfile)
- int encoding;
- int size;
- struct objfile *objfile;
+dwarf_base_type (int encoding, int size, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
+
/* FIXME - this should not produce a new (struct type *)
every time. It should cache base types. */
struct type *type;
switch (encoding)
{
case DW_ATE_address:
- type = dwarf2_fundamental_type (objfile, FT_VOID);
+ type = dwarf2_fundamental_type (objfile, FT_VOID, cu);
return type;
case DW_ATE_boolean:
- type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
+ type = dwarf2_fundamental_type (objfile, FT_BOOLEAN, cu);
return type;
case DW_ATE_complex_float:
if (size == 16)
{
- type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
+ type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX, cu);
}
else
{
- type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
+ type = dwarf2_fundamental_type (objfile, FT_COMPLEX, cu);
}
return type;
case DW_ATE_float:
if (size == 8)
{
- type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
+ type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
}
else
{
- type = dwarf2_fundamental_type (objfile, FT_FLOAT);
+ type = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
}
return type;
case DW_ATE_signed:
switch (size)
{
case 1:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
+ type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
break;
case 2:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
+ type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT, cu);
break;
default:
case 4:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
+ type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
break;
}
return type;
case DW_ATE_signed_char:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
+ type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
return type;
case DW_ATE_unsigned:
switch (size)
{
case 1:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
+ type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
break;
case 2:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
+ type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT, cu);
break;
default:
case 4:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
+ type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER, cu);
break;
}
return type;
case DW_ATE_unsigned_char:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
+ type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
return type;
default:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
+ type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
return type;
}
}
#if 0
struct die_info *
-copy_die (old_die)
- struct die_info *old_die;
+copy_die (struct die_info *old_die)
{
struct die_info *new_die;
int i, num_attrs;
/* Return sibling of die, NULL if no sibling. */
-struct die_info *
-sibling_die (die)
- struct die_info *die;
+static struct die_info *
+sibling_die (struct die_info *die)
{
- int nesting_level = 0;
-
- if (!die->has_children)
- {
- if (die->next && (die->next->tag == 0))
- {
- return NULL;
- }
- else
- {
- return die->next;
- }
- }
- else
- {
- do
- {
- if (die->has_children)
- {
- nesting_level++;
- }
- if (die->tag == 0)
- {
- nesting_level--;
- }
- die = die->next;
- }
- while (nesting_level);
- if (die && (die->tag == 0))
- {
- return NULL;
- }
- else
- {
- return die;
- }
- }
+ return die->sibling;
}
/* Get linkage name of a die, return NULL if not found. */
static char *
-dwarf2_linkage_name (die)
- struct die_info *die;
+dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
{
struct attribute *attr;
- attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
+ attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
+ if (attr && DW_STRING (attr))
+ return DW_STRING (attr);
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
return DW_STRING (attr);
- attr = dwarf_attr (die, DW_AT_name);
+ return NULL;
+}
+
+/* Get name of a die, return NULL if not found. */
+
+static char *
+dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))
return DW_STRING (attr);
return NULL;
}
+/* Return the die that this die in an extension of, or NULL if there
+ is none. */
+
+static struct die_info *
+dwarf2_extension (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+ struct die_info *extension_die;
+ unsigned int ref;
+
+ attr = dwarf2_attr (die, DW_AT_extension, cu);
+ if (attr == NULL)
+ return NULL;
+
+ ref = dwarf2_get_ref_die_offset (attr, cu);
+ extension_die = follow_die_ref (ref);
+ if (!extension_die)
+ {
+ error ("Dwarf Error: Cannot find referent at offset %d.", ref);
+ }
+
+ return extension_die;
+}
+
/* Convert a DIE tag into its string name. */
static char *
-dwarf_tag_name (tag)
- register unsigned tag;
+dwarf_tag_name (unsigned tag)
{
switch (tag)
{
return "DW_TAG_variable";
case DW_TAG_volatile_type:
return "DW_TAG_volatile_type";
+ case DW_TAG_dwarf_procedure:
+ return "DW_TAG_dwarf_procedure";
+ case DW_TAG_restrict_type:
+ return "DW_TAG_restrict_type";
+ case DW_TAG_interface_type:
+ return "DW_TAG_interface_type";
+ case DW_TAG_namespace:
+ return "DW_TAG_namespace";
+ case DW_TAG_imported_module:
+ return "DW_TAG_imported_module";
+ case DW_TAG_unspecified_type:
+ return "DW_TAG_unspecified_type";
+ case DW_TAG_partial_unit:
+ return "DW_TAG_partial_unit";
+ case DW_TAG_imported_unit:
+ return "DW_TAG_imported_unit";
case DW_TAG_MIPS_loop:
return "DW_TAG_MIPS_loop";
case DW_TAG_format_label:
/* Convert a DWARF attribute code into its string name. */
static char *
-dwarf_attr_name (attr)
- register unsigned attr;
+dwarf_attr_name (unsigned attr)
{
switch (attr)
{
return "DW_AT_virtuality";
case DW_AT_vtable_elem_location:
return "DW_AT_vtable_elem_location";
-
+ case DW_AT_allocated:
+ return "DW_AT_allocated";
+ case DW_AT_associated:
+ return "DW_AT_associated";
+ case DW_AT_data_location:
+ return "DW_AT_data_location";
+ case DW_AT_stride:
+ return "DW_AT_stride";
+ case DW_AT_entry_pc:
+ return "DW_AT_entry_pc";
+ case DW_AT_use_UTF8:
+ return "DW_AT_use_UTF8";
+ case DW_AT_extension:
+ return "DW_AT_extension";
+ case DW_AT_ranges:
+ return "DW_AT_ranges";
+ case DW_AT_trampoline:
+ return "DW_AT_trampoline";
+ case DW_AT_call_column:
+ return "DW_AT_call_column";
+ case DW_AT_call_file:
+ return "DW_AT_call_file";
+ case DW_AT_call_line:
+ return "DW_AT_call_line";
#ifdef MIPS
case DW_AT_MIPS_fde:
return "DW_AT_MIPS_fde";
return "DW_AT_MIPS_loop_unroll_factor";
case DW_AT_MIPS_software_pipeline_depth:
return "DW_AT_MIPS_software_pipeline_depth";
+#endif
case DW_AT_MIPS_linkage_name:
return "DW_AT_MIPS_linkage_name";
-#endif
case DW_AT_sf_names:
return "DW_AT_sf_names";
return "DW_AT_body_begin";
case DW_AT_body_end:
return "DW_AT_body_end";
+ case DW_AT_GNU_vector:
+ return "DW_AT_GNU_vector";
default:
return "DW_AT_<unknown>";
}
/* Convert a DWARF value form code into its string name. */
static char *
-dwarf_form_name (form)
- register unsigned form;
+dwarf_form_name (unsigned form)
{
switch (form)
{
/* Convert a DWARF stack opcode into its string name. */
static char *
-dwarf_stack_op_name (op)
- register unsigned op;
+dwarf_stack_op_name (unsigned op)
{
switch (op)
{
return "DW_OP_xderef_size";
case DW_OP_nop:
return "DW_OP_nop";
+ /* DWARF 3 extensions. */
+ case DW_OP_push_object_address:
+ return "DW_OP_push_object_address";
+ case DW_OP_call2:
+ return "DW_OP_call2";
+ case DW_OP_call4:
+ return "DW_OP_call4";
+ case DW_OP_call_ref:
+ return "DW_OP_call_ref";
+ /* GNU extensions. */
+ case DW_OP_GNU_push_tls_address:
+ return "DW_OP_GNU_push_tls_address";
default:
return "OP_<unknown>";
}
}
static char *
-dwarf_bool_name (bool)
- unsigned bool;
+dwarf_bool_name (unsigned mybool)
{
- if (bool)
+ if (mybool)
return "TRUE";
else
return "FALSE";
/* Convert a DWARF type code into its string name. */
static char *
-dwarf_type_encoding_name (enc)
- register unsigned enc;
+dwarf_type_encoding_name (unsigned enc)
{
switch (enc)
{
return "DW_ATE_unsigned";
case DW_ATE_unsigned_char:
return "DW_ATE_unsigned_char";
+ case DW_ATE_imaginary_float:
+ return "DW_ATE_imaginary_float";
default:
return "DW_ATE_<unknown>";
}
#if 0
static char *
-dwarf_cfi_name (cfi_opc)
- register unsigned cfi_opc;
+dwarf_cfi_name (unsigned cfi_opc)
{
switch (cfi_opc)
{
return "DW_CFA_def_cfa_register";
case DW_CFA_def_cfa_offset:
return "DW_CFA_def_cfa_offset";
+
+ /* DWARF 3 */
+ case DW_CFA_def_cfa_expression:
+ return "DW_CFA_def_cfa_expression";
+ case DW_CFA_expression:
+ return "DW_CFA_expression";
+ case DW_CFA_offset_extended_sf:
+ return "DW_CFA_offset_extended_sf";
+ case DW_CFA_def_cfa_sf:
+ return "DW_CFA_def_cfa_sf";
+ case DW_CFA_def_cfa_offset_sf:
+ return "DW_CFA_def_cfa_offset_sf";
+
/* SGI/MIPS specific */
case DW_CFA_MIPS_advance_loc8:
return "DW_CFA_MIPS_advance_loc8";
+
+ /* GNU extensions */
+ case DW_CFA_GNU_window_save:
+ return "DW_CFA_GNU_window_save";
+ case DW_CFA_GNU_args_size:
+ return "DW_CFA_GNU_args_size";
+ case DW_CFA_GNU_negative_offset_extended:
+ return "DW_CFA_GNU_negative_offset_extended";
+
default:
return "DW_CFA_<unknown>";
}
}
#endif
-void
-dump_die (die)
- struct die_info *die;
+static void
+dump_die (struct die_info *die)
{
unsigned int i;
- fprintf (stderr, "Die: %s (abbrev = %d, offset = %d)\n",
+ fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
dwarf_tag_name (die->tag), die->abbrev, die->offset);
- fprintf (stderr, "\thas children: %s\n",
- dwarf_bool_name (die->has_children));
+ fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
+ dwarf_bool_name (die->child != NULL));
- fprintf (stderr, "\tattributes:\n");
+ fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
for (i = 0; i < die->num_attrs; ++i)
{
- fprintf (stderr, "\t\t%s (%s) ",
+ fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
dwarf_attr_name (die->attrs[i].name),
dwarf_form_name (die->attrs[i].form));
switch (die->attrs[i].form)
{
case DW_FORM_ref_addr:
case DW_FORM_addr:
- fprintf (stderr, "address: ");
- print_address_numeric (DW_ADDR (&die->attrs[i]), 1, stderr);
+ fprintf_unfiltered (gdb_stderr, "address: ");
+ print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
break;
case DW_FORM_block2:
case DW_FORM_block4:
case DW_FORM_block:
case DW_FORM_block1:
- fprintf (stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
+ fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
break;
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
+ case DW_FORM_data8:
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_udata:
case DW_FORM_sdata:
- fprintf (stderr, "constant: %d", DW_UNSND (&die->attrs[i]));
+ fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
break;
case DW_FORM_string:
- fprintf (stderr, "string: \"%s\"",
+ case DW_FORM_strp:
+ fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
DW_STRING (&die->attrs[i])
- ? DW_STRING (&die->attrs[i]) : "");
+ ? DW_STRING (&die->attrs[i]) : "");
break;
case DW_FORM_flag:
if (DW_UNSND (&die->attrs[i]))
- fprintf (stderr, "flag: TRUE");
+ fprintf_unfiltered (gdb_stderr, "flag: TRUE");
else
- fprintf (stderr, "flag: FALSE");
+ fprintf_unfiltered (gdb_stderr, "flag: FALSE");
+ break;
+ case DW_FORM_indirect:
+ /* the reader will have reduced the indirect form to
+ the "base form" so this form should not occur */
+ fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
break;
- case DW_FORM_strp: /* we do not support separate string
- section yet */
- case DW_FORM_indirect: /* we do not handle indirect yet */
- case DW_FORM_data8: /* we do not have 64 bit quantities */
default:
- fprintf (stderr, "unsupported attribute form: %d.",
- die->attrs[i].form);
+ fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
+ die->attrs[i].form);
}
- fprintf (stderr, "\n");
+ fprintf_unfiltered (gdb_stderr, "\n");
}
}
-void
-dump_die_list (die)
- struct die_info *die;
+static void
+dump_die_list (struct die_info *die)
{
while (die)
{
dump_die (die);
- die = die->next;
+ if (die->child != NULL)
+ dump_die_list (die->child);
+ if (die->sibling != NULL)
+ dump_die_list (die->sibling);
}
}
-void
-store_in_ref_table (offset, die)
- unsigned int offset;
- struct die_info *die;
+static void
+store_in_ref_table (unsigned int offset, struct die_info *die)
{
int h;
struct die_info *old;
static void
-dwarf2_empty_die_ref_table ()
+dwarf2_empty_hash_tables (void)
{
memset (die_ref_table, 0, sizeof (die_ref_table));
}
static unsigned int
-dwarf2_get_ref_die_offset (attr)
- struct attribute *attr;
+dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu)
{
unsigned int result = 0;
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
+ case DW_FORM_ref8:
case DW_FORM_ref_udata:
- result = cu_header_offset + DW_UNSND (attr);
+ result = cu->header.offset + DW_UNSND (attr);
break;
default:
- complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form));
+ complaint (&symfile_complaints,
+ "unsupported die ref attribute form: '%s'",
+ dwarf_form_name (attr->form));
}
return result;
}
-struct die_info *
-follow_die_ref (offset)
- unsigned int offset;
+/* Return the constant value held by the given attribute. Return -1
+ if the value held by the attribute is not constant. */
+
+static int
+dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
+{
+ if (attr->form == DW_FORM_sdata)
+ return DW_SND (attr);
+ else if (attr->form == DW_FORM_udata
+ || attr->form == DW_FORM_data1
+ || attr->form == DW_FORM_data2
+ || attr->form == DW_FORM_data4
+ || attr->form == DW_FORM_data8)
+ return DW_UNSND (attr);
+ else
+ {
+ complaint (&symfile_complaints, "Attribute value is not a constant (%s)",
+ dwarf_form_name (attr->form));
+ return default_value;
+ }
+}
+
+static struct die_info *
+follow_die_ref (unsigned int offset)
{
struct die_info *die;
int h;
}
static struct type *
-dwarf2_fundamental_type (objfile, typeid)
- struct objfile *objfile;
- int typeid;
+dwarf2_fundamental_type (struct objfile *objfile, int typeid,
+ struct dwarf2_cu *cu)
{
if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
{
- error ("Dwarf Error: internal error - invalid fundamental type id %d.",
- typeid);
+ error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]",
+ typeid, objfile->name);
}
/* Look for this particular type in the fundamental type vector. If
one is not found, create and install one appropriate for the
current language and the current target machine. */
- if (ftypes[typeid] == NULL)
+ if (cu->ftypes[typeid] == NULL)
{
- ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
+ cu->ftypes[typeid] = cu->language_defn->la_fund_type (objfile, typeid);
}
- return (ftypes[typeid]);
+ return (cu->ftypes[typeid]);
}
/* Decode simple location descriptions.
Given a pointer to a dwarf block that defines a location, compute
the location and return the value.
- FIXME: This is a kludge until we figure out a better
- way to handle the location descriptions.
- Gdb's design does not mesh well with the DWARF2 notion of a location
- computing interpreter, which is a shame because the flexibility goes unused.
- FIXME: Implement more operations as necessary.
+ NOTE drow/2003-11-18: This function is called in two situations
+ now: for the address of static or global variables (partial symbols
+ only) and for offsets into structures which are expected to be
+ (more or less) constant. The partial symbol case should go away,
+ and only the constant case should remain. That will let this
+ function complain more accurately. A few special modes are allowed
+ without complaint for global variables (for instance, global
+ register values and thread-local values).
A location description containing no operations indicates that the
- object is optimized out. The global optimized_out flag is set for
- those, the return value is meaningless.
+ object is optimized out. The return value is 0 for that case.
+ FIXME drow/2003-11-16: No callers check for this case any more; soon all
+ callers will only want a very basic result and this can become a
+ complaint.
When the result is a register number, the global isreg flag is set,
otherwise it is cleared.
- When the result is a base register offset, the global offreg flag is set
- and the register number is returned in basereg, otherwise it is cleared.
-
- When the DW_OP_fbreg operation is encountered without a corresponding
- DW_AT_frame_base attribute, the global islocal flag is set.
- Hopefully the machine dependent code knows how to set up a virtual
- frame pointer for the local references.
-
Note that stack[0] is unused except as a default error return.
Note that stack overflow is not yet handled. */
static CORE_ADDR
-decode_locdesc (blk, objfile)
- struct dwarf_block *blk;
- struct objfile *objfile;
+decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
int i;
int size = blk->size;
char *data = blk->data;
stacki = 0;
stack[stacki] = 0;
isreg = 0;
- offreg = 0;
- islocal = 0;
- optimized_out = 1;
while (i < size)
{
- optimized_out = 0;
op = data[i++];
switch (op)
{
+ case DW_OP_lit0:
+ case DW_OP_lit1:
+ case DW_OP_lit2:
+ case DW_OP_lit3:
+ case DW_OP_lit4:
+ case DW_OP_lit5:
+ case DW_OP_lit6:
+ case DW_OP_lit7:
+ case DW_OP_lit8:
+ case DW_OP_lit9:
+ case DW_OP_lit10:
+ case DW_OP_lit11:
+ case DW_OP_lit12:
+ case DW_OP_lit13:
+ case DW_OP_lit14:
+ case DW_OP_lit15:
+ case DW_OP_lit16:
+ case DW_OP_lit17:
+ case DW_OP_lit18:
+ case DW_OP_lit19:
+ case DW_OP_lit20:
+ case DW_OP_lit21:
+ case DW_OP_lit22:
+ case DW_OP_lit23:
+ case DW_OP_lit24:
+ case DW_OP_lit25:
+ case DW_OP_lit26:
+ case DW_OP_lit27:
+ case DW_OP_lit28:
+ case DW_OP_lit29:
+ case DW_OP_lit30:
+ case DW_OP_lit31:
+ stack[++stacki] = op - DW_OP_lit0;
+ break;
+
case DW_OP_reg0:
case DW_OP_reg1:
case DW_OP_reg2:
case DW_OP_reg31:
isreg = 1;
stack[++stacki] = op - DW_OP_reg0;
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
break;
case DW_OP_regx:
isreg = 1;
unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
i += bytes_read;
-#if defined(HARRIS_TARGET) && defined(_M88K)
- /* The Harris 88110 gdb ports have long kept their special reg
- numbers between their gp-regs and their x-regs. This is
- not how our dwarf is generated. Punt. */
- unsnd += 6;
-#endif
stack[++stacki] = unsnd;
- break;
-
- case DW_OP_breg0:
- case DW_OP_breg1:
- case DW_OP_breg2:
- case DW_OP_breg3:
- case DW_OP_breg4:
- case DW_OP_breg5:
- case DW_OP_breg6:
- case DW_OP_breg7:
- case DW_OP_breg8:
- case DW_OP_breg9:
- case DW_OP_breg10:
- case DW_OP_breg11:
- case DW_OP_breg12:
- case DW_OP_breg13:
- case DW_OP_breg14:
- case DW_OP_breg15:
- case DW_OP_breg16:
- case DW_OP_breg17:
- case DW_OP_breg18:
- case DW_OP_breg19:
- case DW_OP_breg20:
- case DW_OP_breg21:
- case DW_OP_breg22:
- case DW_OP_breg23:
- case DW_OP_breg24:
- case DW_OP_breg25:
- case DW_OP_breg26:
- case DW_OP_breg27:
- case DW_OP_breg28:
- case DW_OP_breg29:
- case DW_OP_breg30:
- case DW_OP_breg31:
- offreg = 1;
- basereg = op - DW_OP_breg0;
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- break;
-
- case DW_OP_fbreg:
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- if (frame_base_reg >= 0)
- {
- offreg = 1;
- basereg = frame_base_reg;
- stack[stacki] += frame_base_offset;
- }
- else
- {
- complain (&dwarf2_missing_at_frame_base);
- islocal = 1;
- }
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
break;
case DW_OP_addr:
- stack[++stacki] = read_address (objfile->obfd, &data[i]);
- i += address_size;
+ stack[++stacki] = read_address (objfile->obfd, &data[i],
+ cu, &bytes_read);
+ i += bytes_read;
break;
case DW_OP_const1u:
case DW_OP_constu:
stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
- &bytes_read);
+ &bytes_read);
i += bytes_read;
break;
i += bytes_read;
break;
+ case DW_OP_dup:
+ stack[stacki + 1] = stack[stacki];
+ stacki++;
+ break;
+
case DW_OP_plus:
stack[stacki - 1] += stack[stacki];
stacki--;
break;
case DW_OP_minus:
- stack[stacki - 1] = stack[stacki] - stack[stacki - 1];
+ stack[stacki - 1] -= stack[stacki];
stacki--;
break;
+ case DW_OP_deref:
+ /* If we're not the last op, then we definitely can't encode
+ this using GDB's address_class enum. This is valid for partial
+ global symbols, although the variable's address will be bogus
+ in the psymtab. */
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_GNU_push_tls_address:
+ /* The top of the stack has the offset from the beginning
+ of the thread control block at which the variable is located. */
+ /* Nothing should follow this operator, so the top of stack would
+ be returned. */
+ /* This is valid for partial global symbols, but the variable's
+ address will be bogus in the psymtab. */
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
default:
- complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name(op));
+ complaint (&symfile_complaints, "unsupported stack op: '%s'",
+ dwarf_stack_op_name (op));
return (stack[stacki]);
}
}
/* memory allocation interface */
-/* ARGSUSED */
-static void
-dwarf2_free_tmp_obstack (ignore)
- PTR ignore;
-{
- obstack_free (&dwarf2_tmp_obstack, NULL);
-}
-
static struct dwarf_block *
-dwarf_alloc_block ()
+dwarf_alloc_block (struct dwarf2_cu *cu)
{
struct dwarf_block *blk;
blk = (struct dwarf_block *)
- obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
return (blk);
}
static struct abbrev_info *
-dwarf_alloc_abbrev ()
+dwarf_alloc_abbrev (struct dwarf2_cu *cu)
{
struct abbrev_info *abbrev;
- abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
+ abbrev = (struct abbrev_info *)
+ obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
memset (abbrev, 0, sizeof (struct abbrev_info));
return (abbrev);
}
static struct die_info *
-dwarf_alloc_die ()
+dwarf_alloc_die (void)
{
struct die_info *die;
memset (die, 0, sizeof (struct die_info));
return (die);
}
+
+\f
+/* Macro support. */
+
+
+/* Return the full name of file number I in *LH's file name table.
+ Use COMP_DIR as the name of the current directory of the
+ compilation. The result is allocated using xmalloc; the caller is
+ responsible for freeing it. */
+static char *
+file_full_name (int file, struct line_header *lh, const char *comp_dir)
+{
+ struct file_entry *fe = &lh->file_names[file - 1];
+
+ if (IS_ABSOLUTE_PATH (fe->name))
+ return xstrdup (fe->name);
+ else
+ {
+ const char *dir;
+ int dir_len;
+ char *full_name;
+
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ else
+ dir = comp_dir;
+
+ if (dir)
+ {
+ dir_len = strlen (dir);
+ full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
+ strcpy (full_name, dir);
+ full_name[dir_len] = '/';
+ strcpy (full_name + dir_len + 1, fe->name);
+ return full_name;
+ }
+ else
+ return xstrdup (fe->name);
+ }
+}
+
+
+static struct macro_source_file *
+macro_start_file (int file, int line,
+ struct macro_source_file *current_file,
+ const char *comp_dir,
+ struct line_header *lh, struct objfile *objfile)
+{
+ /* The full name of this source file. */
+ char *full_name = file_full_name (file, lh, comp_dir);
+
+ /* We don't create a macro table for this compilation unit
+ at all until we actually get a filename. */
+ if (! pending_macros)
+ pending_macros = new_macro_table (&objfile->objfile_obstack,
+ objfile->macro_cache);
+
+ if (! current_file)
+ /* If we have no current file, then this must be the start_file
+ directive for the compilation unit's main source file. */
+ current_file = macro_set_main (pending_macros, full_name);
+ else
+ current_file = macro_include (current_file, line, full_name);
+
+ xfree (full_name);
+
+ return current_file;
+}
+
+
+/* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
+ followed by a null byte. */
+static char *
+copy_string (const char *buf, int len)
+{
+ char *s = xmalloc (len + 1);
+ memcpy (s, buf, len);
+ s[len] = '\0';
+
+ return s;
+}
+
+
+static const char *
+consume_improper_spaces (const char *p, const char *body)
+{
+ if (*p == ' ')
+ {
+ complaint (&symfile_complaints,
+ "macro definition contains spaces in formal argument list:\n`%s'",
+ body);
+
+ while (*p == ' ')
+ p++;
+ }
+
+ return p;
+}
+
+
+static void
+parse_macro_definition (struct macro_source_file *file, int line,
+ const char *body)
+{
+ const char *p;
+
+ /* The body string takes one of two forms. For object-like macro
+ definitions, it should be:
+
+ <macro name> " " <definition>
+
+ For function-like macro definitions, it should be:
+
+ <macro name> "() " <definition>
+ or
+ <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
+
+ Spaces may appear only where explicitly indicated, and in the
+ <definition>.
+
+ The Dwarf 2 spec says that an object-like macro's name is always
+ followed by a space, but versions of GCC around March 2002 omit
+ the space when the macro's definition is the empty string.
+
+ The Dwarf 2 spec says that there should be no spaces between the
+ formal arguments in a function-like macro's formal argument list,
+ but versions of GCC around March 2002 include spaces after the
+ commas. */
+
+
+ /* Find the extent of the macro name. The macro name is terminated
+ by either a space or null character (for an object-like macro) or
+ an opening paren (for a function-like macro). */
+ for (p = body; *p; p++)
+ if (*p == ' ' || *p == '(')
+ break;
+
+ if (*p == ' ' || *p == '\0')
+ {
+ /* It's an object-like macro. */
+ int name_len = p - body;
+ char *name = copy_string (body, name_len);
+ const char *replacement;
+
+ if (*p == ' ')
+ replacement = body + name_len + 1;
+ else
+ {
+ dwarf2_macro_malformed_definition_complaint (body);
+ replacement = body + name_len;
+ }
+
+ macro_define_object (file, line, name, replacement);
+
+ xfree (name);
+ }
+ else if (*p == '(')
+ {
+ /* It's a function-like macro. */
+ char *name = copy_string (body, p - body);
+ int argc = 0;
+ int argv_size = 1;
+ char **argv = xmalloc (argv_size * sizeof (*argv));
+
+ p++;
+
+ p = consume_improper_spaces (p, body);
+
+ /* Parse the formal argument list. */
+ while (*p && *p != ')')
+ {
+ /* Find the extent of the current argument name. */
+ const char *arg_start = p;
+
+ while (*p && *p != ',' && *p != ')' && *p != ' ')
+ p++;
+
+ if (! *p || p == arg_start)
+ dwarf2_macro_malformed_definition_complaint (body);
+ else
+ {
+ /* Make sure argv has room for the new argument. */
+ if (argc >= argv_size)
+ {
+ argv_size *= 2;
+ argv = xrealloc (argv, argv_size * sizeof (*argv));
+ }
+
+ argv[argc++] = copy_string (arg_start, p - arg_start);
+ }
+
+ p = consume_improper_spaces (p, body);
+
+ /* Consume the comma, if present. */
+ if (*p == ',')
+ {
+ p++;
+
+ p = consume_improper_spaces (p, body);
+ }
+ }
+
+ if (*p == ')')
+ {
+ p++;
+
+ if (*p == ' ')
+ /* Perfectly formed definition, no complaints. */
+ macro_define_function (file, line, name,
+ argc, (const char **) argv,
+ p + 1);
+ else if (*p == '\0')
+ {
+ /* Complain, but do define it. */
+ dwarf2_macro_malformed_definition_complaint (body);
+ macro_define_function (file, line, name,
+ argc, (const char **) argv,
+ p);
+ }
+ else
+ /* Just complain. */
+ dwarf2_macro_malformed_definition_complaint (body);
+ }
+ else
+ /* Just complain. */
+ dwarf2_macro_malformed_definition_complaint (body);
+
+ xfree (name);
+ {
+ int i;
+
+ for (i = 0; i < argc; i++)
+ xfree (argv[i]);
+ }
+ xfree (argv);
+ }
+ else
+ dwarf2_macro_malformed_definition_complaint (body);
+}
+
+
+static void
+dwarf_decode_macros (struct line_header *lh, unsigned int offset,
+ char *comp_dir, bfd *abfd,
+ struct dwarf2_cu *cu)
+{
+ char *mac_ptr, *mac_end;
+ struct macro_source_file *current_file = 0;
+
+ if (dwarf2_per_objfile->macinfo_buffer == NULL)
+ {
+ complaint (&symfile_complaints, "missing .debug_macinfo section");
+ return;
+ }
+
+ mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset;
+ mac_end = dwarf2_per_objfile->macinfo_buffer
+ + dwarf2_per_objfile->macinfo_size;
+
+ for (;;)
+ {
+ enum dwarf_macinfo_record_type macinfo_type;
+
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ dwarf2_macros_too_long_complaint ();
+ return;
+ }
+
+ macinfo_type = read_1_byte (abfd, mac_ptr);
+ mac_ptr++;
+
+ switch (macinfo_type)
+ {
+ /* A zero macinfo type indicates the end of the macro
+ information. */
+ case 0:
+ return;
+
+ case DW_MACINFO_define:
+ case DW_MACINFO_undef:
+ {
+ int bytes_read;
+ int line;
+ char *body;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ body = read_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ if (! current_file)
+ complaint (&symfile_complaints,
+ "debug info gives macro %s outside of any file: %s",
+ macinfo_type ==
+ DW_MACINFO_define ? "definition" : macinfo_type ==
+ DW_MACINFO_undef ? "undefinition" :
+ "something-or-other", body);
+ else
+ {
+ if (macinfo_type == DW_MACINFO_define)
+ parse_macro_definition (current_file, line, body);
+ else if (macinfo_type == DW_MACINFO_undef)
+ macro_undef (current_file, line, body);
+ }
+ }
+ break;
+
+ case DW_MACINFO_start_file:
+ {
+ int bytes_read;
+ int line, file;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ current_file = macro_start_file (file, line,
+ current_file, comp_dir,
+ lh, cu->objfile);
+ }
+ break;
+
+ case DW_MACINFO_end_file:
+ if (! current_file)
+ complaint (&symfile_complaints,
+ "macro debug info has an unmatched `close_file' directive");
+ else
+ {
+ current_file = current_file->included_by;
+ if (! current_file)
+ {
+ enum dwarf_macinfo_record_type next_type;
+
+ /* GCC circa March 2002 doesn't produce the zero
+ type byte marking the end of the compilation
+ unit. Complain if it's not there, but exit no
+ matter what. */
+
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ dwarf2_macros_too_long_complaint ();
+ return;
+ }
+
+ /* We don't increment mac_ptr here, so this is just
+ a look-ahead. */
+ next_type = read_1_byte (abfd, mac_ptr);
+ if (next_type != 0)
+ complaint (&symfile_complaints,
+ "no terminating 0-type entry for macros in `.debug_macinfo' section");
+
+ return;
+ }
+ }
+ break;
+
+ case DW_MACINFO_vendor_ext:
+ {
+ int bytes_read;
+ int constant;
+ char *string;
+
+ constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ string = read_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ /* We don't recognize any vendor extensions. */
+ }
+ break;
+ }
+ }
+}
+
+/* Check if the attribute's form is a DW_FORM_block*
+ if so return true else false. */
+static int
+attr_form_is_block (struct attribute *attr)
+{
+ return (attr == NULL ? 0 :
+ attr->form == DW_FORM_block1
+ || attr->form == DW_FORM_block2
+ || attr->form == DW_FORM_block4
+ || attr->form == DW_FORM_block);
+}
+
+static void
+dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
+{
+ if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
+ {
+ struct dwarf2_loclist_baton *baton;
+
+ baton = obstack_alloc (&cu->objfile->objfile_obstack,
+ sizeof (struct dwarf2_loclist_baton));
+ baton->objfile = cu->objfile;
+
+ /* We don't know how long the location list is, but make sure we
+ don't run off the edge of the section. */
+ baton->size = dwarf2_per_objfile->loc_size - DW_UNSND (attr);
+ baton->data = dwarf2_per_objfile->loc_buffer + DW_UNSND (attr);
+ baton->base_address = cu->header.base_address;
+ if (cu->header.base_known == 0)
+ complaint (&symfile_complaints,
+ "Location list used without specifying the CU base address.");
+
+ SYMBOL_OPS (sym) = &dwarf2_loclist_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
+ }
+ else
+ {
+ struct dwarf2_locexpr_baton *baton;
+
+ baton = obstack_alloc (&cu->objfile->objfile_obstack,
+ sizeof (struct dwarf2_locexpr_baton));
+ baton->objfile = cu->objfile;
+
+ if (attr_form_is_block (attr))
+ {
+ /* Note that we're just copying the block's data pointer
+ here, not the actual data. We're still pointing into the
+ info_buffer for SYM's objfile; right now we never release
+ that buffer, but when we do clean up properly this may
+ need to change. */
+ baton->size = DW_BLOCK (attr)->size;
+ baton->data = DW_BLOCK (attr)->data;
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("location description",
+ SYMBOL_NATURAL_NAME (sym));
+ baton->size = 0;
+ baton->data = NULL;
+ }
+
+ SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
+ }
+}
+
+/* This cleanup function is passed the address of a dwarf2_cu on the stack
+ when we're finished with it. We can't free the pointer itself, but
+ release any associated storage.
+
+ Only used during partial symbol parsing. */
+
+static void
+free_stack_comp_unit (void *data)
+{
+ struct dwarf2_cu *cu = data;
+
+ obstack_free (&cu->comp_unit_obstack, NULL);
+ cu->partial_dies = NULL;
+}
+
+/* Allocation function for the libiberty hash table which uses an
+ obstack. */
+
+static void *
+hashtab_obstack_allocate (void *data, size_t size, size_t count)
+{
+ unsigned int total = size * count;
+ void *ptr = obstack_alloc ((struct obstack *) data, total);
+ memset (ptr, 0, total);
+ return ptr;
+}
+
+/* Trivial deallocation function for the libiberty splay tree and hash
+ table - don't deallocate anything. Rely on later deletion of the
+ obstack. */
+
+static void
+dummy_obstack_deallocate (void *object, void *data)
+{
+ return;
+}
+
+/* Trivial hash function for partial_die_info: the hash value of a DIE
+ is its offset in .debug_info for this objfile. */
+
+static hashval_t
+partial_die_hash (const void *item)
+{
+ const struct partial_die_info *part_die = item;
+ return part_die->offset;
+}
+
+/* Trivial comparison function for partial_die_info structures: two DIEs
+ are equal if they have the same offset. */
+
+static int
+partial_die_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct partial_die_info *part_die_lhs = item_lhs;
+ const struct partial_die_info *part_die_rhs = item_rhs;
+ return part_die_lhs->offset == part_die_rhs->offset;
+}
+
+void _initialize_dwarf2_read (void);
+
+void
+_initialize_dwarf2_read (void)
+{
+ dwarf2_objfile_data_key = register_objfile_data ();
+}