/* Definitions for values of C expressions, for GDB.
- Copyright 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996
- Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1992-1996, 2000 Free Software Foundation, Inc.
-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. */
#if !defined (VALUE_H)
#define VALUE_H 1
* 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
{
/* Location of value (if lval). */
union
{
- /* Address in inferior or byte of registers structure. */
+ /* If lval == lval_memory, this is the address in the inferior.
+ If lval == lval_register, this is the byte offset into the
+ 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;
+ }
+ location;
+ /* 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. */
+ int offset;
/* Only used for bitfields; number of bits contained in them. */
int bitsize;
/* Only used for bitfields; position of start of field.
CORE_ADDR frame_addr;
/* Type of the value. */
struct type *type;
+ /* Type of the enclosing object if this is an embedded subobject.
+ The member embedded_offset gives the real position of the subobject
+ if type is not the same as enclosing_type.
+
+ If the type field is a pointer type, then enclosing_type is
+ a pointer type pointing to the real (enclosing) type of the target
+ object. */
+ struct type *enclosing_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
struct value *next;
/* ??? When is this used? */
- union {
- CORE_ADDR memaddr;
- char *myaddr;
- } substring_addr;
+ 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
/* If nonzero, this is the value of a variable which does not
actually exist in the program. */
char optimized_out;
+ /* If this value represents an object that is embedded inside a
+ larger object (e.g., a base subobject in C++), this gives the
+ offset (in bytes) from the start of the contents buffer where
+ the embedded object begins. This is required because some C++
+ runtime implementations lay out objects (especially virtual bases
+ with possibly negative offsets to ancestors).
+ Note: This may be positive or negative! Also note that this offset
+ is not used when retrieving contents from target memory; the entire
+ enclosing object has to be retrieved always, and the offset for
+ that is given by the member offset above. */
+ int embedded_offset;
+ /* If this value represents a pointer to an object that is embedded
+ in another object, this gives the embedded_offset of the object
+ that is pointed to. */
+ int pointed_to_offset;
/* The BFD section associated with this value. */
asection *bfd_section;
/* 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;
+ possible value. Note that a value therefore extends beyond
+ what is declared here. */
+ union
+ {
+ long contents[1];
+ double force_double_align;
+ LONGEST force_longlong_align;
+ char *literal_data;
+ }
+ aligner;
+ /* Do not add any new members here -- contents above will trash them */
};
typedef struct value *value_ptr;
#define VALUE_TYPE(val) (val)->type
+#define VALUE_ENCLOSING_TYPE(val) (val)->enclosing_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.
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)
+ certain that the contents of the buffer are valid.
+ Note: The contents pointer is adjusted by the offset required to
+ get to the real subobject, if the value happens to represent
+ something embedded in a larger run-time object. */
+
+#define VALUE_CONTENTS_RAW(val) ((char *) (val)->aligner.contents + (val)->embedded_offset)
#define VALUE_CONTENTS(val) ((void)(VALUE_LAZY(val) && value_fetch_lazy(val)),\
VALUE_CONTENTS_RAW(val))
+
+/* The ALL variants of the above two macros do not adjust the returned
+ pointer by the embedded_offset value. */
+
+#define VALUE_CONTENTS_ALL_RAW(val) ((char *) (val)->aligner.contents)
+#define VALUE_CONTENTS_ALL(val) ((void) (VALUE_LAZY(val) && value_fetch_lazy(val)),\
+ VALUE_CONTENTS_ALL_RAW(val))
+
+
extern int value_fetch_lazy PARAMS ((value_ptr val));
#define VALUE_LVAL(val) (val)->lval
#define VALUE_NEXT(val) (val)->next
#define VALUE_REGNO(val) (val)->regno
#define VALUE_OPTIMIZED_OUT(val) ((val)->optimized_out)
+#define VALUE_EMBEDDED_OFFSET(val) ((val)->embedded_offset)
+#define VALUE_POINTED_TO_OFFSET(val) ((val)->pointed_to_offset)
#define VALUE_BFD_SECTION(val) ((val)->bfd_section)
/* Convert a REF to the object referenced. */
are recorded as a chain of these structures. */
struct internalvar
-{
- struct internalvar *next;
- char *name;
- value_ptr value;
-};
+ {
+ 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))
-
\f
+
#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 void print_address_demangle (CORE_ADDR, struct ui_file *, int);
extern LONGEST value_as_long 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 LONGEST unpack_long PARAMS ((struct type * type, char *valaddr));
-extern DOUBLEST unpack_double 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 CORE_ADDR unpack_pointer PARAMS ((struct type * type, char *valaddr));
-extern LONGEST unpack_field_as_long 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_longest PARAMS ((struct type * type, LONGEST num));
-extern value_ptr value_from_double PARAMS ((struct type *type, DOUBLEST 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, asection *sect));
+extern value_ptr value_from_string PARAMS ((char *string));
-extern value_ptr value_at_lazy PARAMS ((struct type *type, CORE_ADDR addr, asection *sect));
+extern value_ptr value_at PARAMS ((struct type * type, CORE_ADDR addr, asection * sect));
-extern value_ptr value_from_register PARAMS ((struct type *type, int regnum,
- struct frame_info * frame));
+extern value_ptr value_at_lazy PARAMS ((struct type * type, CORE_ADDR addr, asection * sect));
-extern value_ptr value_of_variable PARAMS ((struct symbol *var,
- struct block *b));
+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 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 locate_var_value PARAMS ((struct symbol * var,
+ struct frame_info * frame));
-extern value_ptr allocate_value PARAMS ((struct type *type));
+extern value_ptr allocate_value PARAMS ((struct type * type));
-extern value_ptr allocate_repeat_value PARAMS ((struct type *type, int count));
+extern value_ptr allocate_repeat_value PARAMS ((struct type * type, int count));
extern value_ptr value_mark PARAMS ((void));
extern value_ptr value_bitstring PARAMS ((char *ptr, int len));
extern value_ptr value_array PARAMS ((int lowbound, int highbound,
- value_ptr *elemvec));
+ value_ptr * elemvec));
extern value_ptr value_concat PARAMS ((value_ptr arg1, value_ptr arg2));
extern value_ptr value_complement PARAMS ((value_ptr arg1));
-extern value_ptr value_struct_elt PARAMS ((value_ptr *argp, value_ptr *args,
+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,
+extern value_ptr value_struct_elt_for_reference PARAMS ((struct type * domain,
int offset,
- struct type *curtype,
+ struct type * curtype,
char *name,
- struct type *intype));
+ struct type * intype));
+
+extern value_ptr value_static_field PARAMS ((struct type * type, int fieldno));
-extern value_ptr value_static_field PARAMS ((struct type *type, int fieldno));
+extern struct fn_field *value_find_oload_method_list PARAMS ((value_ptr *, char *, int, int *, int *, struct type **, int *));
+
+extern int find_overload_match PARAMS ((struct type ** arg_types, int nargs, char *name, int method, int lax, value_ptr obj, struct symbol * fsym, value_ptr * valp, struct symbol ** symp, int *staticp));
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));
+ struct type * arg_type));
+
+extern struct type *
+ value_rtti_type PARAMS ((value_ptr, int *, int *, int *));
+
+extern struct type *
+ value_rtti_target_type PARAMS ((value_ptr, int *, int *, int *));
+
+extern value_ptr
+ value_full_object PARAMS ((value_ptr, struct type *, int, int, int));
-extern value_ptr value_cast PARAMS ((struct type *type, value_ptr arg2));
+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_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));
+ struct type * type));
-extern value_ptr value_being_returned PARAMS ((struct type *valtype,
- char retbuf[REGISTER_BYTES],
+extern value_ptr value_being_returned PARAMS ((struct type * valtype,
+ char *retbuf,
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 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));
+ 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_expression PARAMS ((struct expression * exp));
-extern value_ptr evaluate_type 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 access_value_history PARAMS ((int num));
-extern value_ptr value_of_internalvar PARAMS ((struct internalvar *var));
+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 PARAMS ((struct internalvar * var, value_ptr val));
-extern void set_internalvar_component PARAMS ((struct internalvar *var,
+extern void set_internalvar_component PARAMS ((struct internalvar * var,
int offset,
int bitpos, int bitsize,
value_ptr newvalue));
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,
+extern value_ptr value_fn_field PARAMS ((value_ptr * arg1p, struct fn_field * f,
int j,
- struct type* type, int offset));
+ 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,
+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,
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));
+ const struct type * type));
#define value_free(val) free ((PTR)val)
read_register_gen PARAMS ((int regno, char *myaddr));
extern CORE_ADDR
-read_register PARAMS ((int regno));
+ read_register PARAMS ((int regno));
extern CORE_ADDR
-read_register_pid PARAMS ((int regno, int pid));
+ read_register_pid PARAMS ((int regno, int pid));
extern void
write_register PARAMS ((int regno, LONGEST val));
extern void
-write_register_pid PARAMS ((int regno, LONGEST val, int pid));
+write_register_pid PARAMS ((int regno, CORE_ADDR val, int pid));
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 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 void type_print (struct type * type, char *varstring,
+ struct ui_file * stream, int show);
-extern char *baseclass_addr PARAMS ((struct type *type, int index,
+extern char *baseclass_addr PARAMS ((struct type * type, int index,
char *valaddr,
- value_ptr *valuep, int *errp));
+ value_ptr * valuep, int *errp));
-extern void
-print_longest PARAMS ((GDB_FILE *stream, int format, int use_local,
- LONGEST val));
+extern void print_longest (struct ui_file * stream, int format,
+ int use_local, LONGEST val);
-extern void
-print_floating PARAMS ((char *valaddr, struct type *type, GDB_FILE *stream));
+extern void print_floating (char *valaddr, struct type * type,
+ struct ui_file * stream);
-extern int value_print PARAMS ((value_ptr val, GDB_FILE *stream, int format,
- enum val_prettyprint pretty));
+extern int value_print (value_ptr val, struct ui_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 void value_print_array_elements (value_ptr val,
+ struct ui_file *stream,
+ int format,
+ enum val_prettyprint pretty);
extern value_ptr
-value_release_to_mark PARAMS ((value_ptr mark));
+ 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 (struct type * type, char *valaddr,
+ int embedded_offset, CORE_ADDR address,
+ struct ui_file * stream, int format,
+ int deref_ref, int recurse,
+ enum val_prettyprint pretty);
-extern int
-val_print_string PARAMS ((CORE_ADDR addr, int len, int width, GDB_FILE *stream));
+extern int val_print_string (CORE_ADDR addr, int len, int width, struct ui_file *stream);
-extern void
-print_variable_value PARAMS ((struct symbol *var, struct frame_info *frame,
- GDB_FILE *stream));
+extern void print_variable_value (struct symbol * var,
+ struct frame_info * frame,
+ struct ui_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 void c_typedef_print (struct type * type, struct symbol * news,
+ struct ui_file * stream);
extern char *
-internalvar_name PARAMS ((struct internalvar *var));
+ internalvar_name PARAMS ((struct internalvar * var));
extern void
clear_value_history PARAMS ((void));
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 int default_coerce_float_to_double (struct type *, struct type *);
+
+extern int standard_coerce_float_to_double (struct type *, struct type *);
+
+extern value_ptr value_literal_complex PARAMS ((value_ptr, value_ptr, struct type *));
+
+extern void find_rt_vbase_offset PARAMS ((struct type *, struct type *, char *, int, int *, int *));
extern value_ptr find_function_in_inferior PARAMS ((char *));
extern value_ptr value_allocate_space_in_inferior PARAMS ((int));
-extern void _initialize_values PARAMS ((void));
+extern CORE_ADDR default_push_arguments PARAMS ((int nargs, value_ptr * args,
+ CORE_ADDR sp,
+ int struct_return,
+ CORE_ADDR struct_addr));
-#endif /* !defined (VALUE_H) */
+#endif /* !defined (VALUE_H) */
projects / binutils.git / blobdiff