mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-25 05:00:01 +00:00
b5865bb263
if we have a type.
* eval.c (evaluate_subexp_standard): In case of OP_ARRAY:
check number of args against bounds of array to avoid
memory corruption.
* value.h (COERCE_REF): Do a CHECK_TYPEDEF in case we get
a TYPE_CODE_TYPEDEF.
501 lines
16 KiB
C
501 lines
16 KiB
C
/* Definitions for values of C expressions, for GDB.
|
||
Copyright 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996
|
||
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
|
||
(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.
|
||
|
||
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. */
|
||
|
||
#if !defined (VALUE_H)
|
||
#define VALUE_H 1
|
||
|
||
/*
|
||
* 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 inferior
|
||
* (ie to be put into the history list or an internal variable).
|
||
*/
|
||
enum lval_type {
|
||
/* Not an lval. */
|
||
not_lval,
|
||
/* In memory. Could be a saved register. */
|
||
lval_memory,
|
||
/* In a register. */
|
||
lval_register,
|
||
/* In a gdb internal variable. */
|
||
lval_internalvar,
|
||
/* Part of a gdb internal variable (structure field). */
|
||
lval_internalvar_component,
|
||
/* In a register series in a frame not the current one, which may have been
|
||
partially saved or saved in different places (otherwise would be
|
||
lval_register or lval_memory). */
|
||
lval_reg_frame_relative
|
||
};
|
||
|
||
struct value
|
||
{
|
||
/* Type of value; either not an lval, or one of the various
|
||
different possible kinds of lval. */
|
||
enum lval_type lval;
|
||
/* Is it modifiable? Only relevant if lval != not_lval. */
|
||
int modifiable;
|
||
/* Location of value (if lval). */
|
||
union
|
||
{
|
||
/* Address in inferior or byte of registers structure. */
|
||
CORE_ADDR address;
|
||
/* Pointer to internal variable. */
|
||
struct internalvar *internalvar;
|
||
/* Number of register. Only used with
|
||
lval_reg_frame_relative. */
|
||
int regnum;
|
||
} location;
|
||
/* Describes offset of a value within lval a structure in bytes. */
|
||
int offset;
|
||
/* Only used for bitfields; number of bits contained in them. */
|
||
int bitsize;
|
||
/* 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. */
|
||
int bitpos;
|
||
/* Frame value is relative to. In practice, this address is only
|
||
used if the value is stored in several registers in other than
|
||
the current frame, and these registers have not all been saved
|
||
at the same place in memory. This will be described in the
|
||
lval enum above as "lval_reg_frame_relative". */
|
||
CORE_ADDR frame_addr;
|
||
/* Type of the value. */
|
||
struct type *type;
|
||
/* 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. */
|
||
struct value *next;
|
||
|
||
/* ??? When is this used? */
|
||
union {
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
} substring_addr;
|
||
|
||
/* Register number if the value is from a register. Is not kept
|
||
if you take a field of a structure that is stored in a
|
||
register. Shouldn't it be? */
|
||
short regno;
|
||
/* 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). */
|
||
char lazy;
|
||
/* If nonzero, this is the value of a variable which does not
|
||
actually exist in the program. */
|
||
char optimized_out;
|
||
/* Actual contents of the value. For use of this value; setting
|
||
it uses the stuff above. Not valid if lazy is nonzero.
|
||
Target byte-order. We force it to be aligned properly for any
|
||
possible value. */
|
||
union {
|
||
long contents[1];
|
||
double force_double_align;
|
||
LONGEST force_longlong_align;
|
||
char *literal_data;
|
||
} aligner;
|
||
|
||
};
|
||
|
||
typedef struct value *value_ptr;
|
||
|
||
#define VALUE_TYPE(val) (val)->type
|
||
#define VALUE_LAZY(val) (val)->lazy
|
||
/* 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 --
|
||
it uses value_fetch_lazy() to load the buffer from the process being
|
||
debugged if it hasn't already been loaded. VALUE_CONTENTS_RAW is
|
||
used when data is being stored into the buffer, or when it is
|
||
certain that the contents of the buffer are valid. */
|
||
#define VALUE_CONTENTS_RAW(val) ((char *) (val)->aligner.contents)
|
||
#define VALUE_CONTENTS(val) ((void)(VALUE_LAZY(val) && value_fetch_lazy(val)),\
|
||
VALUE_CONTENTS_RAW(val))
|
||
extern int value_fetch_lazy PARAMS ((value_ptr val));
|
||
|
||
#define VALUE_LVAL(val) (val)->lval
|
||
#define VALUE_ADDRESS(val) (val)->location.address
|
||
#define VALUE_INTERNALVAR(val) (val)->location.internalvar
|
||
#define VALUE_FRAME_REGNUM(val) ((val)->location.regnum)
|
||
#define VALUE_FRAME(val) ((val)->frame_addr)
|
||
#define VALUE_OFFSET(val) (val)->offset
|
||
#define VALUE_BITSIZE(val) (val)->bitsize
|
||
#define VALUE_BITPOS(val) (val)->bitpos
|
||
#define VALUE_NEXT(val) (val)->next
|
||
#define VALUE_REGNO(val) (val)->regno
|
||
#define VALUE_OPTIMIZED_OUT(val) ((val)->optimized_out)
|
||
|
||
/* Convert a REF to the object referenced. */
|
||
|
||
#define COERCE_REF(arg) \
|
||
do { CHECK_TYPEDEF (VALUE_TYPE (arg)); \
|
||
if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_REF) \
|
||
arg = value_at_lazy (TYPE_TARGET_TYPE (VALUE_TYPE (arg)), \
|
||
unpack_long (VALUE_TYPE (arg), \
|
||
VALUE_CONTENTS (arg))); \
|
||
} while (0)
|
||
|
||
/* 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. */
|
||
|
||
#define COERCE_ARRAY(arg) \
|
||
do { COERCE_REF(arg); \
|
||
if (current_language->c_style_arrays \
|
||
&& TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_ARRAY) \
|
||
arg = value_coerce_array (arg); \
|
||
if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_FUNC) \
|
||
arg = value_coerce_function (arg); \
|
||
} while (0)
|
||
|
||
#define COERCE_NUMBER(arg) \
|
||
do { COERCE_ARRAY(arg); COERCE_ENUM(arg); } while (0)
|
||
|
||
#define COERCE_VARYING_ARRAY(arg, real_arg_type) \
|
||
{ if (chill_varying_type (real_arg_type)) \
|
||
arg = varying_to_slice (arg), real_arg_type = VALUE_TYPE (arg); }
|
||
|
||
/* If ARG is an enum, convert it to an integer. */
|
||
|
||
#define COERCE_ENUM(arg) { \
|
||
if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_ENUM) \
|
||
arg = value_cast (builtin_type_unsigned_int, arg); \
|
||
}
|
||
|
||
/* Internal variables (variables for convenience of use of debugger)
|
||
are recorded as a chain of these structures. */
|
||
|
||
struct internalvar
|
||
{
|
||
struct internalvar *next;
|
||
char *name;
|
||
value_ptr value;
|
||
};
|
||
|
||
/* Pointer to member function. Depends on compiler implementation. */
|
||
|
||
#define METHOD_PTR_IS_VIRTUAL(ADDR) ((ADDR) & 0x80000000)
|
||
#define METHOD_PTR_FROM_VOFFSET(OFFSET) (0x80000000 + (OFFSET))
|
||
#define METHOD_PTR_TO_VOFFSET(ADDR) (~0x80000000 & (ADDR))
|
||
|
||
|
||
#include "symtab.h"
|
||
#include "gdbtypes.h"
|
||
#include "expression.h"
|
||
|
||
#ifdef __STDC__
|
||
struct frame_info;
|
||
struct fn_field;
|
||
#endif
|
||
|
||
extern void
|
||
print_address_demangle PARAMS ((CORE_ADDR, GDB_FILE *, int));
|
||
|
||
extern LONGEST value_as_long PARAMS ((value_ptr val));
|
||
|
||
extern DOUBLEST value_as_double PARAMS ((value_ptr val));
|
||
|
||
extern CORE_ADDR value_as_pointer PARAMS ((value_ptr val));
|
||
|
||
extern LONGEST unpack_long PARAMS ((struct type *type, char *valaddr));
|
||
|
||
extern DOUBLEST unpack_double PARAMS ((struct type *type, char *valaddr,
|
||
int *invp));
|
||
|
||
extern CORE_ADDR unpack_pointer PARAMS ((struct type *type, char *valaddr));
|
||
|
||
extern LONGEST unpack_field_as_long PARAMS ((struct type *type, char *valaddr,
|
||
int fieldno));
|
||
|
||
extern value_ptr value_from_longest PARAMS ((struct type *type, LONGEST num));
|
||
|
||
extern value_ptr value_from_double PARAMS ((struct type *type, DOUBLEST num));
|
||
|
||
extern value_ptr value_at PARAMS ((struct type *type, CORE_ADDR addr));
|
||
|
||
extern value_ptr value_at_lazy PARAMS ((struct type *type, CORE_ADDR addr));
|
||
|
||
extern value_ptr value_from_register PARAMS ((struct type *type, int regnum,
|
||
struct frame_info * frame));
|
||
|
||
extern value_ptr value_of_variable PARAMS ((struct symbol *var,
|
||
struct block *b));
|
||
|
||
extern value_ptr value_of_register PARAMS ((int regnum));
|
||
|
||
extern int symbol_read_needs_frame PARAMS ((struct symbol *));
|
||
|
||
extern value_ptr read_var_value PARAMS ((struct symbol *var,
|
||
struct frame_info *frame));
|
||
|
||
extern value_ptr locate_var_value PARAMS ((struct symbol *var,
|
||
struct frame_info *frame));
|
||
|
||
extern value_ptr allocate_value PARAMS ((struct type *type));
|
||
|
||
extern value_ptr allocate_repeat_value PARAMS ((struct type *type, int count));
|
||
|
||
extern value_ptr value_mark PARAMS ((void));
|
||
|
||
extern void value_free_to_mark PARAMS ((value_ptr mark));
|
||
|
||
extern value_ptr value_string PARAMS ((char *ptr, int len));
|
||
extern value_ptr value_bitstring PARAMS ((char *ptr, int len));
|
||
|
||
extern value_ptr value_array PARAMS ((int lowbound, int highbound,
|
||
value_ptr *elemvec));
|
||
|
||
extern value_ptr value_concat PARAMS ((value_ptr arg1, value_ptr arg2));
|
||
|
||
extern value_ptr value_binop PARAMS ((value_ptr arg1, value_ptr arg2,
|
||
enum exp_opcode op));
|
||
|
||
extern value_ptr value_add PARAMS ((value_ptr arg1, value_ptr arg2));
|
||
|
||
extern value_ptr value_sub PARAMS ((value_ptr arg1, value_ptr arg2));
|
||
|
||
extern value_ptr value_coerce_array PARAMS ((value_ptr arg1));
|
||
|
||
extern value_ptr value_coerce_function PARAMS ((value_ptr arg1));
|
||
|
||
extern value_ptr value_ind PARAMS ((value_ptr arg1));
|
||
|
||
extern value_ptr value_addr PARAMS ((value_ptr arg1));
|
||
|
||
extern value_ptr value_assign PARAMS ((value_ptr toval, value_ptr fromval));
|
||
|
||
extern value_ptr value_neg PARAMS ((value_ptr arg1));
|
||
|
||
extern value_ptr value_complement PARAMS ((value_ptr arg1));
|
||
|
||
extern value_ptr value_struct_elt PARAMS ((value_ptr *argp, value_ptr *args,
|
||
char *name,
|
||
int *static_memfuncp, char *err));
|
||
|
||
extern value_ptr value_struct_elt_for_reference PARAMS ((struct type *domain,
|
||
int offset,
|
||
struct type *curtype,
|
||
char *name,
|
||
struct type *intype));
|
||
|
||
extern value_ptr value_field PARAMS ((value_ptr arg1, int fieldno));
|
||
|
||
extern value_ptr value_primitive_field PARAMS ((value_ptr arg1, int offset,
|
||
int fieldno,
|
||
struct type *arg_type));
|
||
|
||
extern value_ptr value_cast PARAMS ((struct type *type, value_ptr arg2));
|
||
|
||
extern value_ptr value_zero PARAMS ((struct type *type, enum lval_type lv));
|
||
|
||
extern value_ptr value_repeat PARAMS ((value_ptr arg1, int count));
|
||
|
||
extern value_ptr value_subscript PARAMS ((value_ptr array, value_ptr idx));
|
||
|
||
extern value_ptr value_from_vtable_info PARAMS ((value_ptr arg,
|
||
struct type *type));
|
||
|
||
extern value_ptr value_being_returned PARAMS ((struct type *valtype,
|
||
char retbuf[REGISTER_BYTES],
|
||
int struct_return));
|
||
|
||
extern value_ptr value_in PARAMS ((value_ptr element, value_ptr set));
|
||
|
||
extern int value_bit_index PARAMS ((struct type *type, char *addr, int index));
|
||
|
||
extern int using_struct_return PARAMS ((value_ptr function, CORE_ADDR funcaddr,
|
||
struct type *value_type, int gcc_p));
|
||
|
||
extern void set_return_value PARAMS ((value_ptr val));
|
||
|
||
extern value_ptr evaluate_expression PARAMS ((struct expression *exp));
|
||
|
||
extern value_ptr evaluate_type PARAMS ((struct expression *exp));
|
||
|
||
extern value_ptr evaluate_subexp_with_coercion PARAMS ((struct expression *,
|
||
int *, enum noside));
|
||
|
||
extern value_ptr parse_and_eval PARAMS ((char *exp));
|
||
|
||
extern value_ptr parse_to_comma_and_eval PARAMS ((char **expp));
|
||
|
||
extern struct type *parse_and_eval_type PARAMS ((char *p, int length));
|
||
|
||
extern CORE_ADDR parse_and_eval_address PARAMS ((char *exp));
|
||
|
||
extern CORE_ADDR parse_and_eval_address_1 PARAMS ((char **expptr));
|
||
|
||
extern value_ptr access_value_history PARAMS ((int num));
|
||
|
||
extern value_ptr value_of_internalvar PARAMS ((struct internalvar *var));
|
||
|
||
extern void set_internalvar PARAMS ((struct internalvar *var, value_ptr val));
|
||
|
||
extern void set_internalvar_component PARAMS ((struct internalvar *var,
|
||
int offset,
|
||
int bitpos, int bitsize,
|
||
value_ptr newvalue));
|
||
|
||
extern struct internalvar *lookup_internalvar PARAMS ((char *name));
|
||
|
||
extern int value_equal PARAMS ((value_ptr arg1, value_ptr arg2));
|
||
|
||
extern int value_less PARAMS ((value_ptr arg1, value_ptr arg2));
|
||
|
||
extern int value_logical_not PARAMS ((value_ptr arg1));
|
||
|
||
/* C++ */
|
||
|
||
extern value_ptr value_of_this PARAMS ((int complain));
|
||
|
||
extern value_ptr value_x_binop PARAMS ((value_ptr arg1, value_ptr arg2,
|
||
enum exp_opcode op,
|
||
enum exp_opcode otherop,
|
||
enum noside noside));
|
||
|
||
extern value_ptr value_x_unop PARAMS ((value_ptr arg1, enum exp_opcode op,
|
||
enum noside noside));
|
||
|
||
extern value_ptr value_fn_field PARAMS ((value_ptr *arg1p, struct fn_field *f,
|
||
int j,
|
||
struct type* type, int offset));
|
||
|
||
extern value_ptr value_virtual_fn_field PARAMS ((value_ptr *arg1p,
|
||
struct fn_field *f, int j,
|
||
struct type *type,
|
||
int offset));
|
||
|
||
extern int binop_user_defined_p PARAMS ((enum exp_opcode op,
|
||
value_ptr arg1, value_ptr arg2));
|
||
|
||
extern int unop_user_defined_p PARAMS ((enum exp_opcode op, value_ptr arg1));
|
||
|
||
extern int destructor_name_p PARAMS ((const char *name,
|
||
const struct type *type));
|
||
|
||
#define value_free(val) free ((PTR)val)
|
||
|
||
extern void free_all_values PARAMS ((void));
|
||
|
||
extern void release_value PARAMS ((value_ptr val));
|
||
|
||
extern int record_latest_value PARAMS ((value_ptr val));
|
||
|
||
extern void registers_changed PARAMS ((void));
|
||
|
||
extern void read_register_bytes PARAMS ((int regbyte, char *myaddr, int len));
|
||
|
||
extern void write_register_bytes PARAMS ((int regbyte, char *myaddr, int len));
|
||
|
||
extern void
|
||
read_register_gen PARAMS ((int regno, char *myaddr));
|
||
|
||
extern CORE_ADDR
|
||
read_register PARAMS ((int regno));
|
||
|
||
extern void
|
||
write_register PARAMS ((int regno, LONGEST val));
|
||
|
||
extern void
|
||
supply_register PARAMS ((int regno, char *val));
|
||
|
||
extern void
|
||
get_saved_register PARAMS ((char *raw_buffer, int *optimized,
|
||
CORE_ADDR *addrp, struct frame_info *frame,
|
||
int regnum, enum lval_type *lval));
|
||
|
||
extern void
|
||
modify_field PARAMS ((char *addr, LONGEST fieldval, int bitpos, int bitsize));
|
||
|
||
extern void
|
||
type_print PARAMS ((struct type *type, char *varstring, GDB_FILE *stream,
|
||
int show));
|
||
|
||
extern char *baseclass_addr PARAMS ((struct type *type, int index,
|
||
char *valaddr,
|
||
value_ptr *valuep, int *errp));
|
||
|
||
extern void
|
||
print_longest PARAMS ((GDB_FILE *stream, int format, int use_local,
|
||
LONGEST val));
|
||
|
||
extern void
|
||
print_floating PARAMS ((char *valaddr, struct type *type, GDB_FILE *stream));
|
||
|
||
extern int value_print PARAMS ((value_ptr val, GDB_FILE *stream, int format,
|
||
enum val_prettyprint pretty));
|
||
|
||
extern void
|
||
value_print_array_elements PARAMS ((value_ptr val, GDB_FILE* stream,
|
||
int format, enum val_prettyprint pretty));
|
||
|
||
extern value_ptr
|
||
value_release_to_mark PARAMS ((value_ptr mark));
|
||
|
||
extern int
|
||
val_print PARAMS ((struct type *type, char *valaddr, CORE_ADDR address,
|
||
GDB_FILE *stream, int format, int deref_ref,
|
||
int recurse, enum val_prettyprint pretty));
|
||
|
||
extern int
|
||
val_print_string PARAMS ((CORE_ADDR addr, unsigned int len, GDB_FILE *stream));
|
||
|
||
extern void
|
||
print_variable_value PARAMS ((struct symbol *var, struct frame_info *frame,
|
||
GDB_FILE *stream));
|
||
|
||
extern int check_field PARAMS ((value_ptr, const char *));
|
||
|
||
extern void
|
||
c_typedef_print PARAMS ((struct type *type, struct symbol *news, GDB_FILE *stream));
|
||
|
||
extern char *
|
||
internalvar_name PARAMS ((struct internalvar *var));
|
||
|
||
extern void
|
||
clear_value_history PARAMS ((void));
|
||
|
||
extern void
|
||
clear_internalvars PARAMS ((void));
|
||
|
||
/* From values.c */
|
||
|
||
extern value_ptr value_copy PARAMS ((value_ptr));
|
||
|
||
extern int baseclass_offset PARAMS ((struct type *, int, char *, CORE_ADDR));
|
||
|
||
/* From valops.c */
|
||
|
||
extern value_ptr varying_to_slice PARAMS ((value_ptr));
|
||
|
||
extern value_ptr value_slice PARAMS ((value_ptr, int, int));
|
||
|
||
extern value_ptr call_function_by_hand PARAMS ((value_ptr, int, value_ptr *));
|
||
|
||
extern value_ptr value_literal_complex PARAMS ((value_ptr, value_ptr, struct type*));
|
||
|
||
extern value_ptr find_function_in_inferior PARAMS ((char *));
|
||
|
||
extern value_ptr value_allocate_space_in_inferior PARAMS ((int));
|
||
|
||
#endif /* !defined (VALUE_H) */
|