/* Definitions for values of C expressions, for GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+ 2008, 2009, 2010 Free Software Foundation, Inc.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (VALUE_H)
#define VALUE_H 1
struct symbol;
struct type;
struct ui_file;
+struct language_defn;
+struct value_print_options;
/* The structure which defines the type of a value. It should never
be possible for a program lval value to survive over a call to the
struct value;
/* Values are stored in a chain, so that they can be deleted easily
- over calls to the inferior. Values assigned to internal variables
- or put into the value history are taken off this list. */
+ over calls to the inferior. Values assigned to internal variables,
+ put into the value history or exposed to Python are taken off this
+ list. */
struct value *value_next (struct value *);
/* Type of the value. */
-extern struct type *value_type (struct value *);
+extern struct type *value_type (const struct value *);
/* This is being used to change the type of an existing value, that
code should instead be creating a new value with the changed type
/* Only used for bitfields; number of bits contained in them. */
-extern int value_bitsize (struct value *);
+extern int value_bitsize (const struct value *);
extern void set_value_bitsize (struct value *, int bit);
/* Only used for bitfields; position of start of field. For
- BITS_BIG_ENDIAN=0 targets, it is the position of the LSB. For
- BITS_BIG_ENDIAN=1 targets, it is the position of the MSB. */
+ gdbarch_bits_big_endian=0 targets, it is the position of the LSB. For
+ gdbarch_bits_big_endian=1 targets, it is the position of the MSB. */
-extern int value_bitpos (struct value *);
+extern int value_bitpos (const struct value *);
extern void set_value_bitpos (struct value *, int bit);
+/* Only used for bitfields; the containing value. This allows a
+ single read from the target when displaying multiple
+ bitfields. */
+
+struct value *value_parent (struct value *);
+
/* Describes offset of a value within lval of a structure in bytes.
If lval == lval_memory, this is an offset to the address. If lval
== lval_register, this is a further offset from location.address
within the registers structure. Note also the member
embedded_offset below. */
-extern int value_offset (struct value *);
+extern int value_offset (const struct value *);
extern void set_value_offset (struct value *, int offset);
/* The comment from "struct value" reads: ``Is it modifiable? Only
extern int value_embedded_offset (struct value *value);
extern void set_value_embedded_offset (struct value *value, int val);
+/* For lval_computed values, this structure holds functions used to
+ retrieve and set the value (or portions of the value).
+
+ For each function, 'V' is the 'this' pointer: an lval_funcs
+ function F may always assume that the V it receives is an
+ lval_computed value, and has F in the appropriate slot of its
+ lval_funcs structure. */
+
+struct lval_funcs
+{
+ /* Fill in VALUE's contents. This is used to "un-lazy" values. If
+ a problem arises in obtaining VALUE's bits, this function should
+ call 'error'. */
+ void (*read) (struct value *v);
+
+ /* Handle an assignment TOVAL = FROMVAL by writing the value of
+ FROMVAL to TOVAL's location. The contents of TOVAL have not yet
+ been updated. If a problem arises in doing so, this function
+ should call 'error'. */
+ void (*write) (struct value *toval, struct value *fromval);
+
+ /* Check the validity of some bits in VALUE. This should return 1
+ if all the bits starting at OFFSET and extending for LENGTH bits
+ are valid, or 0 if any bit is invalid. */
+ int (*check_validity) (const struct value *value, int offset, int length);
+
+ /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
+ int (*check_any_valid) (const struct value *value);
+
+ /* Return a duplicate of VALUE's closure, for use in a new value.
+ This may simply return the same closure, if VALUE's is
+ reference-counted or statically allocated.
+
+ This may be NULL, in which case VALUE's closure is re-used in the
+ new value. */
+ void *(*copy_closure) (const struct value *v);
+
+ /* Drop VALUE's reference to its closure. Maybe this frees the
+ closure; maybe this decrements a reference count; maybe the
+ closure is statically allocated and this does nothing.
+
+ This may be NULL, in which case no action is taken to free
+ VALUE's closure. */
+ void (*free_closure) (struct value *v);
+};
+
+/* Create a computed lvalue, with type TYPE, function pointers FUNCS,
+ and closure CLOSURE. */
+
+extern struct value *allocate_computed_value (struct type *type,
+ struct lval_funcs *funcs,
+ void *closure);
+
+/* If VALUE is lval_computed, return its lval_funcs structure. */
+
+extern struct lval_funcs *value_computed_funcs (struct value *value);
+
+/* If VALUE is lval_computed, return its closure. The meaning of the
+ returned value depends on the functions VALUE uses. */
+
+extern void *value_computed_closure (const struct value *value);
+
/* If zero, contents of this value are in the contents field. If
- nonzero, contents are in inferior memory at address in the
- location.address field plus the offset field (and the lval field
- should be lval_memory).
+ nonzero, contents are in inferior. If the lval field is lval_memory,
+ the contents are in inferior memory at location.address plus offset.
+ The lval field may also be lval_register.
WARNING: This field is used by the code which handles watchpoints
(see breakpoint.c) to decide whether a particular value can be
extern int value_lazy (struct value *);
extern void set_value_lazy (struct value *value, int val);
+extern int value_stack (struct value *);
+extern void set_value_stack (struct value *value, int val);
+
/* value_contents() and value_contents_raw() both return the address
of the gdb buffer used to hold a copy of the contents of the lval.
value_contents() is used when the contents of the buffer are needed
get to the real subobject, if the value happens to represent
something embedded in a larger run-time object. */
-extern bfd_byte *value_contents_raw (struct value *);
+extern gdb_byte *value_contents_raw (struct value *);
/* Actual contents of the value. For use of this value; setting it
uses the stuff above. Not valid if lazy is nonzero. Target
value. Note that a value therefore extends beyond what is
declared here. */
-extern const bfd_byte *value_contents (struct value *);
-extern bfd_byte *value_contents_writeable (struct value *);
+extern const gdb_byte *value_contents (struct value *);
+extern gdb_byte *value_contents_writeable (struct value *);
/* The ALL variants of the above two macros do not adjust the returned
pointer by the embedded_offset value. */
-extern bfd_byte *value_contents_all_raw (struct value *);
-extern const bfd_byte *value_contents_all (struct value *);
+extern gdb_byte *value_contents_all_raw (struct value *);
+extern const gdb_byte *value_contents_all (struct value *);
+
+/* Like value_contents_all, but does not require that the returned
+ bits be valid. This should only be used in situations where you
+ plan to check the validity manually. */
+extern const gdb_byte *value_contents_for_printing (struct value *value);
extern int value_fetch_lazy (struct value *val);
extern int value_contents_equal (struct value *val1, struct value *val2);
extern int value_optimized_out (struct value *value);
extern void set_value_optimized_out (struct value *value, int val);
+/* Like value_optimized_out, but return false if any bit in the object
+ is valid. */
+extern int value_entirely_optimized_out (const struct value *value);
+
+/* Set or return field indicating whether a variable is initialized or
+ not, based on debugging information supplied by the compiler.
+ 1 = initialized; 0 = uninitialized. */
+extern int value_initialized (struct value *);
+extern void set_value_initialized (struct value *, int);
+
+/* Set COMPONENT's location as appropriate for a component of WHOLE
+ --- regardless of what kind of lvalue WHOLE is. */
+extern void set_value_component_location (struct value *component,
+ const struct value *whole);
+
/* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
single value might have multiple LVALs), this hacked interface is
limited to just the first PIECE. Expect further change. */
extern enum lval_type *deprecated_value_lval_hack (struct value *);
#define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
-/* If lval == lval_memory, this is the address in the inferior. If
- lval == lval_register, this is the byte offset into the registers
- structure. */
-extern CORE_ADDR *deprecated_value_address_hack (struct value *);
-#define VALUE_ADDRESS(val) (*deprecated_value_address_hack (val))
+/* If lval == lval_memory, return the address in the inferior. If
+ lval == lval_register, return the byte offset into the registers
+ structure. Otherwise, return 0. The returned address
+ includes the offset, if any. */
+extern CORE_ADDR value_address (struct value *);
+
+/* Like value_address, except the result does not include value's
+ offset. */
+extern CORE_ADDR value_raw_address (struct value *);
+
+/* Set the address of a value. */
+extern void set_value_address (struct value *, CORE_ADDR);
/* Pointer to internal variable. */
extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
extern struct value *coerce_ref (struct value *value);
/* If ARG is an array, convert it to a pointer.
- If ARG is an enum, convert it to an integer.
If ARG is a function, convert it to a function pointer.
References are dereferenced. */
extern struct value *coerce_array (struct value *value);
-extern struct value *coerce_number (struct value *value);
-
-/* If ARG is an enum, convert it to an integer. */
-extern struct value *coerce_enum (struct value *value);
+/* Given a value, determine whether the bits starting at OFFSET and
+ extending for LENGTH bits are valid. This returns nonzero if all
+ bits in the given range are valid, zero if any bit is invalid. */
-/* Internal variables (variables for convenience of use of debugger)
- are recorded as a chain of these structures. */
-
-struct internalvar
-{
- struct internalvar *next;
- char *name;
- struct value *value;
-};
+extern int value_bits_valid (const struct value *value,
+ int offset, int length);
\f
struct frame_info;
struct fn_field;
-extern void print_address_demangle (CORE_ADDR, struct ui_file *, int);
+extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
+ struct ui_file *, int);
extern LONGEST value_as_long (struct value *val);
extern DOUBLEST value_as_double (struct value *val);
extern CORE_ADDR value_as_address (struct value *val);
-extern LONGEST unpack_long (struct type *type, const char *valaddr);
-extern DOUBLEST unpack_double (struct type *type, const char *valaddr,
+extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
+extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
int *invp);
-extern CORE_ADDR unpack_pointer (struct type *type, const char *valaddr);
-extern LONGEST unpack_field_as_long (struct type *type, const char *valaddr,
+extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
+LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
+ int bitpos, int bitsize);
+extern LONGEST unpack_field_as_long (struct type *type,
+ const gdb_byte *valaddr,
int fieldno);
+extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
+
extern struct value *value_from_longest (struct type *type, LONGEST num);
+extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
extern struct value *value_from_double (struct type *type, DOUBLEST num);
-extern struct value *value_from_string (char *string);
+extern struct value *value_from_decfloat (struct type *type,
+ const gdb_byte *decbytes);
extern struct value *value_at (struct type *type, CORE_ADDR addr);
extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
+extern struct value *value_from_contents_and_address (struct type *,
+ const gdb_byte *,
+ CORE_ADDR);
+
+extern struct value *default_value_from_register (struct type *type,
+ int regnum,
+ struct frame_info *frame);
+
extern struct value *value_from_register (struct type *type, int regnum,
struct frame_info *frame);
+extern CORE_ADDR address_from_register (struct type *type, int regnum,
+ struct frame_info *frame);
+
extern struct value *value_of_variable (struct symbol *var, struct block *b);
+extern struct value *address_of_variable (struct symbol *var, struct block *b);
+
extern struct value *value_of_register (int regnum, struct frame_info *frame);
+struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
+
extern int symbol_read_needs_frame (struct symbol *);
extern struct value *read_var_value (struct symbol *var,
struct frame_info *frame);
-extern struct value *locate_var_value (struct symbol *var,
- struct frame_info *frame);
-
extern struct value *allocate_value (struct type *type);
+extern struct value *allocate_value_lazy (struct type *type);
+extern void allocate_value_contents (struct value *value);
extern struct value *allocate_repeat_value (struct type *type, int count);
extern void value_free_to_mark (struct value *mark);
-extern struct value *value_string (char *ptr, int len);
-extern struct value *value_bitstring (char *ptr, int len);
+extern struct value *value_cstring (char *ptr, int len,
+ struct type *char_type);
+extern struct value *value_string (char *ptr, int len,
+ struct type *char_type);
+extern struct value *value_bitstring (char *ptr, int len,
+ struct type *index_type);
extern struct value *value_array (int lowbound, int highbound,
struct value **elemvec);
extern struct value *value_binop (struct value *arg1, struct value *arg2,
enum exp_opcode op);
-extern struct value *value_add (struct value *arg1, struct value *arg2);
+extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
-extern struct value *value_sub (struct value *arg1, struct value *arg2);
+extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
+
+extern int value_must_coerce_to_target (struct value *arg1);
+
+extern struct value *value_coerce_to_target (struct value *arg1);
extern struct value *value_coerce_array (struct value *arg1);
extern struct value *value_addr (struct value *arg1);
+extern struct value *value_ref (struct value *arg1);
+
extern struct value *value_assign (struct value *toval,
struct value *fromval);
+extern struct value *value_pos (struct value *arg1);
+
extern struct value *value_neg (struct value *arg1);
extern struct value *value_complement (struct value *arg1);
extern struct value *value_struct_elt (struct value **argp,
struct value **args,
- char *name, int *static_memfuncp,
- char *err);
+ const char *name, int *static_memfuncp,
+ const char *err);
extern struct value *value_aggregate_elt (struct type *curtype,
- char *name, enum noside noside);
+ char *name,
+ struct type *expect_type,
+ int want_address,
+ enum noside noside);
extern struct value *value_static_field (struct type *type, int fieldno);
-extern struct fn_field *value_find_oload_method_list (struct value **, char *,
+extern struct fn_field *value_find_oload_method_list (struct value **,
+ const char *,
int, int *,
struct type **, int *);
+enum oload_search_type { NON_METHOD, METHOD, BOTH };
+
extern int find_overload_match (struct type **arg_types, int nargs,
- char *name, int method, int lax,
+ const char *name,
+ enum oload_search_type method, int lax,
struct value **objp, struct symbol *fsym,
struct value **valp, struct symbol **symp,
- int *staticp);
+ int *staticp, const int no_adl);
extern struct value *value_field (struct value *arg1, int fieldno);
extern struct value *value_full_object (struct value *, struct type *, int,
int, int);
+extern struct value *value_cast_pointers (struct type *, struct value *);
+
extern struct value *value_cast (struct type *type, struct value *arg2);
+extern struct value *value_reinterpret_cast (struct type *type,
+ struct value *arg);
+
+extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
+
extern struct value *value_zero (struct type *type, enum lval_type lv);
+extern struct value *value_one (struct type *type, enum lval_type lv);
+
extern struct value *value_repeat (struct value *arg1, int count);
-extern struct value *value_subscript (struct value *array, struct value *idx);
+extern struct value *value_subscript (struct value *array, LONGEST index);
+
+extern struct value *value_bitstring_subscript (struct type *type,
+ struct value *bitstring,
+ LONGEST index);
extern struct value *register_value_being_returned (struct type *valtype,
struct regcache *retbuf);
-extern struct value *value_in (struct value *element, struct value *set);
+extern int value_in (struct value *element, struct value *set);
-extern int value_bit_index (struct type *type, const bfd_byte *addr,
+extern int value_bit_index (struct type *type, const gdb_byte *addr,
int index);
-extern int using_struct_return (struct type *value_type, int gcc_p);
+extern int using_struct_return (struct gdbarch *gdbarch,
+ struct type *func_type,
+ struct type *value_type);
extern struct value *evaluate_expression (struct expression *exp);
extern struct value *evaluate_type (struct expression *exp);
+extern struct value *evaluate_subexp (struct type *expect_type,
+ struct expression *exp,
+ int *pos, enum noside noside);
+
+extern struct value *evaluate_subexpression_type (struct expression *exp,
+ int subexp);
+
+extern void fetch_subexp_value (struct expression *exp, int *pc,
+ struct value **valp, struct value **resultp,
+ struct value **val_chain);
+
+extern char *extract_field_op (struct expression *exp, int *subexp);
+
extern struct value *evaluate_subexp_with_coercion (struct expression *,
int *, enum noside);
extern LONGEST parse_and_eval_long (char *exp);
+extern void unop_promote (const struct language_defn *language,
+ struct gdbarch *gdbarch,
+ struct value **arg1);
+
+extern void binop_promote (const struct language_defn *language,
+ struct gdbarch *gdbarch,
+ struct value **arg1, struct value **arg2);
+
extern struct value *access_value_history (int num);
-extern struct value *value_of_internalvar (struct internalvar *var);
+extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
+ struct internalvar *var);
+
+extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
extern void set_internalvar (struct internalvar *var, struct value *val);
+extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
+
+extern void set_internalvar_string (struct internalvar *var,
+ const char *string);
+
+extern void clear_internalvar (struct internalvar *var);
+
extern void set_internalvar_component (struct internalvar *var,
int offset,
int bitpos, int bitsize,
struct value *newvalue);
-extern struct internalvar *lookup_internalvar (char *name);
+extern struct internalvar *lookup_only_internalvar (const char *name);
+
+extern struct internalvar *create_internalvar (const char *name);
+
+typedef struct value * (*internalvar_make_value) (struct gdbarch *,
+ struct internalvar *);
+extern struct internalvar *
+ create_internalvar_type_lazy (char *name, internalvar_make_value fun);
+
+extern struct internalvar *lookup_internalvar (const char *name);
extern int value_equal (struct value *arg1, struct value *arg2);
+extern int value_equal_contents (struct value *arg1, struct value *arg2);
+
extern int value_less (struct value *arg1, struct value *arg2);
extern int value_logical_not (struct value *arg1);
extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
int j, struct type *type, int offset);
+extern int binop_types_user_defined_p (enum exp_opcode op,
+ struct type *type1,
+ struct type *type2);
+
extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
struct value *arg2);
extern int destructor_name_p (const char *name, const struct type *type);
-#define value_free(val) xfree (val)
+extern void value_incref (struct value *val);
+
+extern void value_free (struct value *val);
extern void free_all_values (void);
+extern void free_value_chain (struct value *v);
+
extern void release_value (struct value *val);
extern int record_latest_value (struct value *val);
-extern void modify_field (char *addr, LONGEST fieldval, int bitpos,
- int bitsize);
+extern void modify_field (struct type *type, gdb_byte *addr,
+ LONGEST fieldval, int bitpos, int bitsize);
extern void type_print (struct type *type, char *varstring,
struct ui_file *stream, int show);
-extern char *baseclass_addr (struct type *type, int index, char *valaddr,
- struct value **valuep, int *errp);
+extern char *type_to_string (struct type *type);
+
+extern gdb_byte *baseclass_addr (struct type *type, int index,
+ gdb_byte *valaddr,
+ struct value **valuep, int *errp);
extern void print_longest (struct ui_file *stream, int format,
int use_local, LONGEST val);
-extern void print_floating (const bfd_byte *valaddr, struct type *type,
+extern void print_floating (const gdb_byte *valaddr, struct type *type,
struct ui_file *stream);
-extern int value_print (struct value *val, struct ui_file *stream, int format,
- enum val_prettyprint pretty);
+extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
+ struct ui_file *stream);
+
+extern int value_print (struct value *val, struct ui_file *stream,
+ const struct value_print_options *options);
extern void value_print_array_elements (struct value *val,
struct ui_file *stream, int format,
extern struct value *value_release_to_mark (struct value *mark);
-extern int val_print (struct type *type, const bfd_byte *valaddr,
+extern int val_print (struct type *type, const gdb_byte *valaddr,
int embedded_offset, CORE_ADDR address,
- struct ui_file *stream, int format,
- int deref_ref, int recurse,
- enum val_prettyprint pretty);
+ struct ui_file *stream, int recurse,
+ const struct value *val,
+ const struct value_print_options *options,
+ const struct language_defn *language);
extern int common_val_print (struct value *val,
- struct ui_file *stream, int format,
- int deref_ref, int recurse,
- enum val_prettyprint pretty);
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options,
+ const struct language_defn *language);
-extern int val_print_string (CORE_ADDR addr, int len, int width,
- struct ui_file *stream);
+extern int val_print_string (struct type *elttype, CORE_ADDR addr, int len,
+ struct ui_file *stream,
+ const struct value_print_options *options);
-extern void print_variable_value (struct symbol *var,
- struct frame_info *frame,
- struct ui_file *stream);
+extern void print_variable_and_value (const char *name,
+ struct symbol *var,
+ struct frame_info *frame,
+ struct ui_file *stream,
+ int indent);
-extern int check_field (struct value *, const char *);
+extern int check_field (struct type *, const char *);
extern void typedef_print (struct type *type, struct symbol *news,
struct ui_file *stream);
extern char *internalvar_name (struct internalvar *var);
-extern void clear_value_history (void);
-
-extern void clear_internalvars (void);
+extern void preserve_values (struct objfile *);
/* From values.c */
extern struct value *value_copy (struct value *);
+extern void preserve_one_value (struct value *, struct objfile *, htab_t);
+
/* From valops.c */
extern struct value *varying_to_slice (struct value *);
extern struct value *value_literal_complex (struct value *, struct value *,
struct type *);
-extern void find_rt_vbase_offset (struct type *, struct type *,
- const bfd_byte *, int, int *, int *);
-
-extern struct value *find_function_in_inferior (const char *);
+extern struct value *find_function_in_inferior (const char *,
+ struct objfile **);
extern struct value *value_allocate_space_in_inferior (int);
extern struct value *value_of_local (const char *name, int complain);
+extern struct value *value_subscripted_rvalue (struct value *array,
+ LONGEST index, int lowerbound);
+
+/* User function handler. */
+
+typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
+ const struct language_defn *language,
+ void *cookie,
+ int argc,
+ struct value **argv);
+
+void add_internal_function (const char *name, const char *doc,
+ internal_function_fn handler,
+ void *cookie);
+
+struct value *call_internal_function (struct gdbarch *gdbarch,
+ const struct language_defn *language,
+ struct value *function,
+ int argc, struct value **argv);
+
+char *value_internal_function_name (struct value *);
+
#endif /* !defined (VALUE_H) */