/* Symbol table definitions for GDB.
- Copyright (C) 1986-2017 Free Software Foundation, Inc.
+ Copyright (C) 1986-2018 Free Software Foundation, Inc.
This file is part of GDB.
#if !defined (SYMTAB_H)
#define SYMTAB_H 1
+#include <array>
#include <vector>
#include <string>
#include "gdb_vecs.h"
struct agent_expr;
struct program_space;
struct language_defn;
-struct probe;
struct common_block;
struct obj_section;
struct cmd_list_element;
+class probe;
struct lookup_name_info;
/* How to match a lookup name against a symbol search name. */
namespace/module/package. */
FULL,
+ /* Search name matching. This is like FULL, but the search name did
+ not come from the user; instead it is already a search name
+ retrieved from a SYMBOL_SEARCH_NAME/MSYMBOL_SEARCH_NAME call.
+ For Ada, this avoids re-encoding an already-encoded search name
+ (which would potentially incorrectly lowercase letters in the
+ linkage/search name that should remain uppercase). For C++, it
+ avoids trying to demangle a name we already know is
+ demangled. */
+ SEARCH_NAME,
+
/* Expression matching. The same as FULL matching in most
languages. The same as WILD matching in Ada. */
EXPRESSION,
otherwise. If non-NULL, store the matching results in MATCH. */
bool matches (const char *symbol_search_name,
symbol_name_match_type match_type,
- completion_match *match) const;
+ completion_match_result *comp_match_res) const;
/* The Ada-encoded lookup name. */
const std::string &lookup_name () const
bool standard_p () const
{ return m_standard_p; }
- private:
+ /* Return true if doing a verbatim match. */
+ bool verbatim_p () const
+ { return m_verbatim_p; }
+
+private:
/* The Ada-encoded lookup name. */
std::string m_encoded_name;
SYMBOL_SEARCH_NAME should be a symbol's "search" name.
- On success and if non-NULL, MATCH is set to point to the symbol
- name as should be presented to the user as a completion match list
- element. In most languages, this is the same as the symbol's
- search name, but in some, like Ada, the display name is dynamically
- computed within the comparison routine. */
+ On success and if non-NULL, COMP_MATCH_RES->match is set to point
+ to the symbol name as should be presented to the user as a
+ completion match list element. In most languages, this is the same
+ as the symbol's search name, but in some, like Ada, the display
+ name is dynamically computed within the comparison routine.
+
+ Also, on success and if non-NULL, COMP_MATCH_RES->match_for_lcd
+ points the part of SYMBOL_SEARCH_NAME that was considered to match
+ LOOKUP_NAME. E.g., in C++, in linespec/wild mode, if the symbol is
+ "foo::function()" and LOOKUP_NAME is "function(", MATCH_FOR_LCD
+ points to "function()" inside SYMBOL_SEARCH_NAME. */
typedef bool (symbol_name_matcher_ftype)
(const char *symbol_search_name,
const lookup_name_info &lookup_name,
- completion_match *match);
+ completion_match_result *comp_match_res);
/* Some of the structures in this file are space critical.
The space-critical structures are:
{
mst_unknown = 0, /* Unknown type, the default */
mst_text, /* Generally executable instructions */
- mst_text_gnu_ifunc, /* Executable code returning address
+
+ /* A GNU ifunc symbol, in the .text section. GDB uses to know
+ whether the user is setting a breakpoint on a GNU ifunc function,
+ and thus GDB needs to actually set the breakpoint on the target
+ function. It is also used to know whether the program stepped
+ into an ifunc resolver -- the resolver may get a separate
+ symbol/alias under a different name, but it'll have the same
+ address as the ifunc symbol. */
+ mst_text_gnu_ifunc, /* Executable code returning address
of executable code */
+
+ /* A GNU ifunc function descriptor symbol, in a data section
+ (typically ".opd"). Seen on architectures that use function
+ descriptors, like PPC64/ELFv1. In this case, this symbol's value
+ is the address of the descriptor. There'll be a corresponding
+ mst_text_gnu_ifunc synthetic symbol for the text/entry
+ address. */
+ mst_data_gnu_ifunc, /* Executable code returning address
+ of executable code */
+
mst_slot_got_plt, /* GOT entries for .plt sections */
mst_data, /* Generally initialized data */
mst_bss, /* Generally uninitialized data */
const struct symbol_register_ops *ops_register;
};
+/* struct symbol has some subclasses. This enum is used to
+ differentiate between them. */
+
+enum symbol_subclass_kind
+{
+ /* Plain struct symbol. */
+ SYMBOL_NONE,
+
+ /* struct template_symbol. */
+ SYMBOL_TEMPLATE,
+
+ /* struct rust_vtable_symbol. */
+ SYMBOL_RUST_VTABLE
+};
+
/* This structure is space critical. See space comments at the top. */
struct symbol
/* Whether this is an inlined function (class LOC_BLOCK only). */
unsigned is_inlined : 1;
- /* True if this is a C++ function symbol with template arguments.
- In this case the symbol is really a "struct template_symbol". */
- unsigned is_cplus_template_function : 1;
+ /* The concrete type of this symbol. */
+
+ ENUM_BITFIELD (symbol_subclass_kind) subclass : 2;
/* Line number of this symbol's definition, except for inlined
functions. For an inlined function (class LOC_BLOCK and
#define SYMBOL_IS_ARGUMENT(symbol) (symbol)->is_argument
#define SYMBOL_INLINED(symbol) (symbol)->is_inlined
#define SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION(symbol) \
- (symbol)->is_cplus_template_function
+ (((symbol)->subclass) == SYMBOL_TEMPLATE)
#define SYMBOL_TYPE(symbol) (symbol)->type
#define SYMBOL_LINE(symbol) (symbol)->line
#define SYMBOL_COMPUTED_OPS(symbol) (SYMBOL_IMPL (symbol).ops_computed)
extern void symbol_set_symtab (struct symbol *symbol, struct symtab *symtab);
/* An instance of this type is used to represent a C++ template
- function. It includes a "struct symbol" as a kind of base class;
- users downcast to "struct template_symbol *" when needed. A symbol
- is really of this type iff SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION is
- true. */
+ function. A symbol is really of this type iff
+ SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION is true. */
-struct template_symbol
+struct template_symbol : public symbol
{
- /* The base class. */
- struct symbol base;
-
/* The number of template arguments. */
int n_template_arguments;
struct symbol **template_arguments;
};
+/* A symbol that represents a Rust virtual table object. */
+
+struct rust_vtable_symbol : public symbol
+{
+ /* The concrete type for which this vtable was created; that is, in
+ "impl Trait for Type", this is "Type". */
+ struct type *concrete_type;
+};
+
\f
/* Each item represents a line-->pc (or the reverse) mapping. This is
somewhat more wasteful of space than one might wish, but since only
const domain_enum,
struct field_of_this_result *);
+/* Find the definition for a specified symbol search name in domain
+ DOMAIN, visible from lexical block BLOCK if non-NULL or from
+ global/static blocks if BLOCK is NULL. The passed-in search name
+ should not come from the user; instead it should already be a
+ search name as retrieved from a
+ SYMBOL_SEARCH_NAME/MSYMBOL_SEARCH_NAME call. See definition of
+ symbol_name_match_type::SEARCH_NAME. Returns the struct symbol
+ pointer, or NULL if no symbol is found. The symbol's section is
+ fixed up if necessary. */
+
+extern struct block_symbol lookup_symbol_search_name (const char *search_name,
+ const struct block *block,
+ domain_enum domain);
+
/* A default version of lookup_symbol_nonlocal for use by languages
that can't think of anything better to do.
This implements the C lookup rules. */
extern struct symbol *
lookup_symbol_in_block (const char *name,
+ symbol_name_match_type match_type,
const struct block *block,
const domain_enum domain);
extern struct symbol *find_pc_sect_function (CORE_ADDR, struct obj_section *);
-extern int find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, const char **name,
- CORE_ADDR *address,
- CORE_ADDR *endaddr,
- int *is_gnu_ifunc_p);
+/* Find the symbol at the given address. Returns NULL if no symbol
+ found. Only exact matches for ADDRESS are considered. */
+
+extern struct symbol *find_symbol_at_address (CORE_ADDR);
/* lookup function from address, return name, start addr and end addr. */
extern int find_pc_partial_function (CORE_ADDR, const char **, CORE_ADDR *,
CORE_ADDR *);
+/* Return the type of a function with its first instruction exactly at
+ the PC address. Return NULL otherwise. */
+
+extern struct type *find_function_type (CORE_ADDR pc);
+
+/* See if we can figure out the function's actual type from the type
+ that the resolver returns. RESOLVER_FUNADDR is the address of the
+ ifunc resolver. */
+
+extern struct type *find_gnu_ifunc_target_type (CORE_ADDR resolver_funaddr);
+
+/* Find the GNU ifunc minimal symbol that matches SYM. */
+extern bound_minimal_symbol find_gnu_ifunc (const symbol *sym);
+
extern void clear_pc_function_cache (void);
/* Expand symtab containing PC, SECTION if not already expanded. */
struct symtab *symtab = NULL;
struct symbol *symbol = NULL;
struct obj_section *section = NULL;
+ struct minimal_symbol *msymbol = NULL;
/* Line number. Line numbers start at 1 and proceed through symtab->nlines.
0 is never a valid line number; it is used to indicate that line number
information is not available. */
bool explicit_line = false;
/* The probe associated with this symtab_and_line. */
- struct probe *probe = NULL;
+ probe *prob = NULL;
/* If PROBE is not NULL, then this is the objfile in which the probe
originated. */
struct objfile *objfile = NULL;
extern completion_list
make_source_files_completion_list (const char *, const char *);
+/* Return whether SYM is a function/method, as opposed to a data symbol. */
+
+extern bool symbol_is_function_or_method (symbol *sym);
+
+/* Return whether MSYMBOL is a function/method, as opposed to a data
+ symbol */
+
+extern bool symbol_is_function_or_method (minimal_symbol *msymbol);
+
+/* Return whether SYM should be skipped in completion mode MODE. In
+ linespec mode, we're only interested in functions/methods. */
+
+template<typename Symbol>
+static bool
+completion_skip_symbol (complete_symbol_mode mode, Symbol *sym)
+{
+ return (mode == complete_symbol_mode::LINESPEC
+ && !symbol_is_function_or_method (sym));
+}
+
/* symtab.c */
int matching_obj_sections (struct obj_section *, struct obj_section *);
extern struct symtab *find_line_symtab (struct symtab *, int, int *, int *);
-extern struct symtab_and_line find_function_start_sal (struct symbol *sym,
- int);
+/* Given a function symbol SYM, find the symtab and line for the start
+ of the function. If FUNFIRSTLINE is true, we want the first line
+ of real code inside the function. */
+extern symtab_and_line find_function_start_sal (symbol *sym, bool
+ funfirstline);
+
+/* Same, but start with a function address/section instead of a
+ symbol. */
+extern symtab_and_line find_function_start_sal (CORE_ADDR func_addr,
+ obj_section *section,
+ bool funfirstline);
extern void skip_prologue_sal (struct symtab_and_line *);
language symbol_language,
const char *symname,
const lookup_name_info &lookup_name,
- const char *sym_text, int sym_text_len,
const char *text, const char *word);
#endif /* !defined(SYMTAB_H) */
projects / binutils-gdb.git / blobdiff