| /* 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 of a structure in bytes. |
| This is used in retrieving contents from target memory. [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. |
| 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; |
| /* 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 |
| 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; |
| /* 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. 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. |
| 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. |
| 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_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) |
| #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. */ |
| |
| #define COERCE_REF(arg) \ |
| do { struct type *value_type_arg_tmp = check_typedef (VALUE_TYPE (arg));\ |
| if (TYPE_CODE (value_type_arg_tmp) == TYPE_CODE_REF) \ |
| arg = value_at_lazy (TYPE_TARGET_TYPE (value_type_arg_tmp), \ |
| unpack_long (VALUE_TYPE (arg), \ |
| VALUE_CONTENTS (arg)), \ |
| VALUE_BFD_SECTION (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 (check_typedef (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_from_string PARAMS ((char *string)); |
| |
| extern value_ptr value_at PARAMS ((struct type *type, CORE_ADDR addr, asection *sect)); |
| |
| extern value_ptr value_at_lazy 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_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_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)); |
| |
| 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_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, |
| 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 CORE_ADDR |
| 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, 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 |
| 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, int embedded_offset, 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, int len, int width, 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 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 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) */ |