1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986-2003, 2005-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "gdb_string.h"
25 #include "expression.h"
28 #include "language.h" /* For CAST_IS_CONVERSION. */
29 #include "f-lang.h" /* For array bound stuff. */
32 #include "objc-lang.h"
34 #include "parser-defs.h"
35 #include "cp-support.h"
37 #include "exceptions.h"
39 #include "user-regs.h"
41 #include "gdb_obstack.h"
43 #include "python/python.h"
45 #include "gdb_assert.h"
49 /* This is defined in valops.c */
50 extern int overload_resolution
;
52 /* Prototypes for local functions. */
54 static struct value
*evaluate_subexp_for_sizeof (struct expression
*, int *);
56 static struct value
*evaluate_subexp_for_address (struct expression
*,
59 static char *get_label (struct expression
*, int *);
61 static struct value
*evaluate_struct_tuple (struct value
*,
62 struct expression
*, int *,
65 static LONGEST
init_array_element (struct value
*, struct value
*,
66 struct expression
*, int *, enum noside
,
70 evaluate_subexp (struct type
*expect_type
, struct expression
*exp
,
71 int *pos
, enum noside noside
)
73 return (*exp
->language_defn
->la_exp_desc
->evaluate_exp
)
74 (expect_type
, exp
, pos
, noside
);
77 /* Parse the string EXP as a C expression, evaluate it,
78 and return the result as a number. */
81 parse_and_eval_address (char *exp
)
83 struct expression
*expr
= parse_expression (exp
);
85 struct cleanup
*old_chain
=
86 make_cleanup (free_current_contents
, &expr
);
88 addr
= value_as_address (evaluate_expression (expr
));
89 do_cleanups (old_chain
);
93 /* Like parse_and_eval_address, but treats the value of the expression
94 as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
96 parse_and_eval_long (char *exp
)
98 struct expression
*expr
= parse_expression (exp
);
100 struct cleanup
*old_chain
=
101 make_cleanup (free_current_contents
, &expr
);
103 retval
= value_as_long (evaluate_expression (expr
));
104 do_cleanups (old_chain
);
109 parse_and_eval (char *exp
)
111 struct expression
*expr
= parse_expression (exp
);
113 struct cleanup
*old_chain
=
114 make_cleanup (free_current_contents
, &expr
);
116 val
= evaluate_expression (expr
);
117 do_cleanups (old_chain
);
121 /* Parse up to a comma (or to a closeparen)
122 in the string EXPP as an expression, evaluate it, and return the value.
123 EXPP is advanced to point to the comma. */
126 parse_to_comma_and_eval (char **expp
)
128 struct expression
*expr
= parse_exp_1 (expp
, 0, (struct block
*) 0, 1);
130 struct cleanup
*old_chain
=
131 make_cleanup (free_current_contents
, &expr
);
133 val
= evaluate_expression (expr
);
134 do_cleanups (old_chain
);
138 /* Evaluate an expression in internal prefix form
139 such as is constructed by parse.y.
141 See expression.h for info on the format of an expression. */
144 evaluate_expression (struct expression
*exp
)
148 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_NORMAL
);
151 /* Evaluate an expression, avoiding all memory references
152 and getting a value whose type alone is correct. */
155 evaluate_type (struct expression
*exp
)
159 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_AVOID_SIDE_EFFECTS
);
162 /* Evaluate a subexpression, avoiding all memory references and
163 getting a value whose type alone is correct. */
166 evaluate_subexpression_type (struct expression
*exp
, int subexp
)
168 return evaluate_subexp (NULL_TYPE
, exp
, &subexp
, EVAL_AVOID_SIDE_EFFECTS
);
171 /* Find the current value of a watchpoint on EXP. Return the value in
172 *VALP and *RESULTP and the chain of intermediate and final values
173 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
176 If a memory error occurs while evaluating the expression, *RESULTP will
177 be set to NULL. *RESULTP may be a lazy value, if the result could
178 not be read from memory. It is used to determine whether a value
179 is user-specified (we should watch the whole value) or intermediate
180 (we should watch only the bit used to locate the final value).
182 If the final value, or any intermediate value, could not be read
183 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
184 set to any referenced values. *VALP will never be a lazy value.
185 This is the value which we store in struct breakpoint.
187 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
188 value chain. The caller must free the values individually. If
189 VAL_CHAIN is NULL, all generated values will be left on the value
193 fetch_subexp_value (struct expression
*exp
, int *pc
, struct value
**valp
,
194 struct value
**resultp
, struct value
**val_chain
)
196 struct value
*mark
, *new_mark
, *result
;
197 volatile struct gdb_exception ex
;
205 /* Evaluate the expression. */
206 mark
= value_mark ();
209 TRY_CATCH (ex
, RETURN_MASK_ALL
)
211 result
= evaluate_subexp (NULL_TYPE
, exp
, pc
, EVAL_NORMAL
);
215 /* Ignore memory errors, we want watchpoints pointing at
216 inaccessible memory to still be created; otherwise, throw the
217 error to some higher catcher. */
223 throw_exception (ex
);
228 new_mark
= value_mark ();
229 if (mark
== new_mark
)
234 /* Make sure it's not lazy, so that after the target stops again we
235 have a non-lazy previous value to compare with. */
238 if (!value_lazy (result
))
242 volatile struct gdb_exception except
;
244 TRY_CATCH (except
, RETURN_MASK_ERROR
)
246 value_fetch_lazy (result
);
254 /* Return the chain of intermediate values. We use this to
255 decide which addresses to watch. */
256 *val_chain
= new_mark
;
257 value_release_to_mark (mark
);
261 /* Extract a field operation from an expression. If the subexpression
262 of EXP starting at *SUBEXP is not a structure dereference
263 operation, return NULL. Otherwise, return the name of the
264 dereferenced field, and advance *SUBEXP to point to the
265 subexpression of the left-hand-side of the dereference. This is
266 used when completing field names. */
269 extract_field_op (struct expression
*exp
, int *subexp
)
274 if (exp
->elts
[*subexp
].opcode
!= STRUCTOP_STRUCT
275 && exp
->elts
[*subexp
].opcode
!= STRUCTOP_PTR
)
277 tem
= longest_to_int (exp
->elts
[*subexp
+ 1].longconst
);
278 result
= &exp
->elts
[*subexp
+ 2].string
;
279 (*subexp
) += 1 + 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
283 /* If the next expression is an OP_LABELED, skips past it,
284 returning the label. Otherwise, does nothing and returns NULL. */
287 get_label (struct expression
*exp
, int *pos
)
289 if (exp
->elts
[*pos
].opcode
== OP_LABELED
)
292 char *name
= &exp
->elts
[pc
+ 2].string
;
293 int tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
295 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
302 /* This function evaluates tuples (in (the deleted) Chill) or
303 brace-initializers (in C/C++) for structure types. */
305 static struct value
*
306 evaluate_struct_tuple (struct value
*struct_val
,
307 struct expression
*exp
,
308 int *pos
, enum noside noside
, int nargs
)
310 struct type
*struct_type
= check_typedef (value_type (struct_val
));
311 struct type
*substruct_type
= struct_type
;
312 struct type
*field_type
;
320 struct value
*val
= NULL
;
325 /* Skip past the labels, and count them. */
326 while (get_label (exp
, pos
) != NULL
)
331 char *label
= get_label (exp
, &pc
);
335 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
338 const char *field_name
=
339 TYPE_FIELD_NAME (struct_type
, fieldno
);
341 if (field_name
!= NULL
&& strcmp (field_name
, label
) == 0)
344 subfieldno
= fieldno
;
345 substruct_type
= struct_type
;
349 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
352 const char *field_name
=
353 TYPE_FIELD_NAME (struct_type
, fieldno
);
355 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
356 if ((field_name
== 0 || *field_name
== '\0')
357 && TYPE_CODE (field_type
) == TYPE_CODE_UNION
)
360 for (; variantno
< TYPE_NFIELDS (field_type
);
364 = TYPE_FIELD_TYPE (field_type
, variantno
);
365 if (TYPE_CODE (substruct_type
) == TYPE_CODE_STRUCT
)
368 subfieldno
< TYPE_NFIELDS (substruct_type
);
371 if (strcmp(TYPE_FIELD_NAME (substruct_type
,
382 error (_("there is no field named %s"), label
);
388 /* Unlabelled tuple element - go to next field. */
392 if (subfieldno
>= TYPE_NFIELDS (substruct_type
))
395 substruct_type
= struct_type
;
401 /* Skip static fields. */
402 while (fieldno
< TYPE_NFIELDS (struct_type
)
403 && field_is_static (&TYPE_FIELD (struct_type
,
406 subfieldno
= fieldno
;
407 if (fieldno
>= TYPE_NFIELDS (struct_type
))
408 error (_("too many initializers"));
409 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
410 if (TYPE_CODE (field_type
) == TYPE_CODE_UNION
411 && TYPE_FIELD_NAME (struct_type
, fieldno
)[0] == '0')
412 error (_("don't know which variant you want to set"));
416 /* Here, struct_type is the type of the inner struct,
417 while substruct_type is the type of the inner struct.
418 These are the same for normal structures, but a variant struct
419 contains anonymous union fields that contain substruct fields.
420 The value fieldno is the index of the top-level (normal or
421 anonymous union) field in struct_field, while the value
422 subfieldno is the index of the actual real (named inner) field
423 in substruct_type. */
425 field_type
= TYPE_FIELD_TYPE (substruct_type
, subfieldno
);
427 val
= evaluate_subexp (field_type
, exp
, pos
, noside
);
429 /* Now actually set the field in struct_val. */
431 /* Assign val to field fieldno. */
432 if (value_type (val
) != field_type
)
433 val
= value_cast (field_type
, val
);
435 bitsize
= TYPE_FIELD_BITSIZE (substruct_type
, subfieldno
);
436 bitpos
= TYPE_FIELD_BITPOS (struct_type
, fieldno
);
438 bitpos
+= TYPE_FIELD_BITPOS (substruct_type
, subfieldno
);
439 addr
= value_contents_writeable (struct_val
) + bitpos
/ 8;
441 modify_field (struct_type
, addr
,
442 value_as_long (val
), bitpos
% 8, bitsize
);
444 memcpy (addr
, value_contents (val
),
445 TYPE_LENGTH (value_type (val
)));
447 while (--nlabels
> 0);
452 /* Recursive helper function for setting elements of array tuples for
453 (the deleted) Chill. The target is ARRAY (which has bounds
454 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
455 and NOSIDE are as usual. Evaluates index expresions and sets the
456 specified element(s) of ARRAY to ELEMENT. Returns last index
460 init_array_element (struct value
*array
, struct value
*element
,
461 struct expression
*exp
, int *pos
,
462 enum noside noside
, LONGEST low_bound
, LONGEST high_bound
)
465 int element_size
= TYPE_LENGTH (value_type (element
));
467 if (exp
->elts
[*pos
].opcode
== BINOP_COMMA
)
470 init_array_element (array
, element
, exp
, pos
, noside
,
471 low_bound
, high_bound
);
472 return init_array_element (array
, element
,
473 exp
, pos
, noside
, low_bound
, high_bound
);
475 else if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
480 low
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
481 high
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
482 if (low
< low_bound
|| high
> high_bound
)
483 error (_("tuple range index out of range"));
484 for (index
= low
; index
<= high
; index
++)
486 memcpy (value_contents_raw (array
)
487 + (index
- low_bound
) * element_size
,
488 value_contents (element
), element_size
);
493 index
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
494 if (index
< low_bound
|| index
> high_bound
)
495 error (_("tuple index out of range"));
496 memcpy (value_contents_raw (array
) + (index
- low_bound
) * element_size
,
497 value_contents (element
), element_size
);
502 static struct value
*
503 value_f90_subarray (struct value
*array
,
504 struct expression
*exp
, int *pos
, enum noside noside
)
507 LONGEST low_bound
, high_bound
;
508 struct type
*range
= check_typedef (TYPE_INDEX_TYPE (value_type (array
)));
509 enum f90_range_type range_type
= longest_to_int (exp
->elts
[pc
].longconst
);
513 if (range_type
== LOW_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
514 low_bound
= TYPE_LOW_BOUND (range
);
516 low_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
518 if (range_type
== HIGH_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
519 high_bound
= TYPE_HIGH_BOUND (range
);
521 high_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
523 return value_slice (array
, low_bound
, high_bound
- low_bound
+ 1);
527 /* Promote value ARG1 as appropriate before performing a unary operation
529 If the result is not appropriate for any particular language then it
530 needs to patch this function. */
533 unop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
538 *arg1
= coerce_ref (*arg1
);
539 type1
= check_typedef (value_type (*arg1
));
541 if (is_integral_type (type1
))
543 switch (language
->la_language
)
546 /* Perform integral promotion for ANSI C/C++.
547 If not appropropriate for any particular language
548 it needs to modify this function. */
550 struct type
*builtin_int
= builtin_type (gdbarch
)->builtin_int
;
552 if (TYPE_LENGTH (type1
) < TYPE_LENGTH (builtin_int
))
553 *arg1
= value_cast (builtin_int
, *arg1
);
560 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
561 operation on those two operands.
562 If the result is not appropriate for any particular language then it
563 needs to patch this function. */
566 binop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
567 struct value
**arg1
, struct value
**arg2
)
569 struct type
*promoted_type
= NULL
;
573 *arg1
= coerce_ref (*arg1
);
574 *arg2
= coerce_ref (*arg2
);
576 type1
= check_typedef (value_type (*arg1
));
577 type2
= check_typedef (value_type (*arg2
));
579 if ((TYPE_CODE (type1
) != TYPE_CODE_FLT
580 && TYPE_CODE (type1
) != TYPE_CODE_DECFLOAT
581 && !is_integral_type (type1
))
582 || (TYPE_CODE (type2
) != TYPE_CODE_FLT
583 && TYPE_CODE (type2
) != TYPE_CODE_DECFLOAT
584 && !is_integral_type (type2
)))
587 if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
588 || TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
)
590 /* No promotion required. */
592 else if (TYPE_CODE (type1
) == TYPE_CODE_FLT
593 || TYPE_CODE (type2
) == TYPE_CODE_FLT
)
595 switch (language
->la_language
)
601 case language_opencl
:
602 /* No promotion required. */
606 /* For other languages the result type is unchanged from gdb
607 version 6.7 for backward compatibility.
608 If either arg was long double, make sure that value is also long
609 double. Otherwise use double. */
610 if (TYPE_LENGTH (type1
) * 8 > gdbarch_double_bit (gdbarch
)
611 || TYPE_LENGTH (type2
) * 8 > gdbarch_double_bit (gdbarch
))
612 promoted_type
= builtin_type (gdbarch
)->builtin_long_double
;
614 promoted_type
= builtin_type (gdbarch
)->builtin_double
;
618 else if (TYPE_CODE (type1
) == TYPE_CODE_BOOL
619 && TYPE_CODE (type2
) == TYPE_CODE_BOOL
)
621 /* No promotion required. */
624 /* Integral operations here. */
625 /* FIXME: Also mixed integral/booleans, with result an integer. */
627 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
628 unsigned int promoted_len1
= TYPE_LENGTH (type1
);
629 unsigned int promoted_len2
= TYPE_LENGTH (type2
);
630 int is_unsigned1
= TYPE_UNSIGNED (type1
);
631 int is_unsigned2
= TYPE_UNSIGNED (type2
);
632 unsigned int result_len
;
633 int unsigned_operation
;
635 /* Determine type length and signedness after promotion for
637 if (promoted_len1
< TYPE_LENGTH (builtin
->builtin_int
))
640 promoted_len1
= TYPE_LENGTH (builtin
->builtin_int
);
642 if (promoted_len2
< TYPE_LENGTH (builtin
->builtin_int
))
645 promoted_len2
= TYPE_LENGTH (builtin
->builtin_int
);
648 if (promoted_len1
> promoted_len2
)
650 unsigned_operation
= is_unsigned1
;
651 result_len
= promoted_len1
;
653 else if (promoted_len2
> promoted_len1
)
655 unsigned_operation
= is_unsigned2
;
656 result_len
= promoted_len2
;
660 unsigned_operation
= is_unsigned1
|| is_unsigned2
;
661 result_len
= promoted_len1
;
664 switch (language
->la_language
)
670 if (result_len
<= TYPE_LENGTH (builtin
->builtin_int
))
672 promoted_type
= (unsigned_operation
673 ? builtin
->builtin_unsigned_int
674 : builtin
->builtin_int
);
676 else if (result_len
<= TYPE_LENGTH (builtin
->builtin_long
))
678 promoted_type
= (unsigned_operation
679 ? builtin
->builtin_unsigned_long
680 : builtin
->builtin_long
);
684 promoted_type
= (unsigned_operation
685 ? builtin
->builtin_unsigned_long_long
686 : builtin
->builtin_long_long
);
689 case language_opencl
:
690 if (result_len
<= TYPE_LENGTH (lookup_signed_typename
691 (language
, gdbarch
, "int")))
695 ? lookup_unsigned_typename (language
, gdbarch
, "int")
696 : lookup_signed_typename (language
, gdbarch
, "int"));
698 else if (result_len
<= TYPE_LENGTH (lookup_signed_typename
699 (language
, gdbarch
, "long")))
703 ? lookup_unsigned_typename (language
, gdbarch
, "long")
704 : lookup_signed_typename (language
, gdbarch
,"long"));
708 /* For other languages the result type is unchanged from gdb
709 version 6.7 for backward compatibility.
710 If either arg was long long, make sure that value is also long
711 long. Otherwise use long. */
712 if (unsigned_operation
)
714 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
715 promoted_type
= builtin
->builtin_unsigned_long_long
;
717 promoted_type
= builtin
->builtin_unsigned_long
;
721 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
722 promoted_type
= builtin
->builtin_long_long
;
724 promoted_type
= builtin
->builtin_long
;
732 /* Promote both operands to common type. */
733 *arg1
= value_cast (promoted_type
, *arg1
);
734 *arg2
= value_cast (promoted_type
, *arg2
);
739 ptrmath_type_p (const struct language_defn
*lang
, struct type
*type
)
741 type
= check_typedef (type
);
742 if (TYPE_CODE (type
) == TYPE_CODE_REF
)
743 type
= TYPE_TARGET_TYPE (type
);
745 switch (TYPE_CODE (type
))
751 case TYPE_CODE_ARRAY
:
752 return TYPE_VECTOR (type
) ? 0 : lang
->c_style_arrays
;
759 /* Constructs a fake method with the given parameter types.
760 This function is used by the parser to construct an "expected"
761 type for method overload resolution. */
764 make_params (int num_types
, struct type
**param_types
)
766 struct type
*type
= XZALLOC (struct type
);
767 TYPE_MAIN_TYPE (type
) = XZALLOC (struct main_type
);
768 TYPE_LENGTH (type
) = 1;
769 TYPE_CODE (type
) = TYPE_CODE_METHOD
;
770 TYPE_VPTR_FIELDNO (type
) = -1;
771 TYPE_CHAIN (type
) = type
;
772 if (num_types
> 0 && param_types
[num_types
- 1] == NULL
)
775 TYPE_VARARGS (type
) = 1;
777 TYPE_NFIELDS (type
) = num_types
;
778 TYPE_FIELDS (type
) = (struct field
*)
779 TYPE_ZALLOC (type
, sizeof (struct field
) * num_types
);
781 while (num_types
-- > 0)
782 TYPE_FIELD_TYPE (type
, num_types
) = param_types
[num_types
];
788 evaluate_subexp_standard (struct type
*expect_type
,
789 struct expression
*exp
, int *pos
,
794 int pc
, pc2
= 0, oldpos
;
795 struct value
*arg1
= NULL
;
796 struct value
*arg2
= NULL
;
800 struct value
**argvec
;
805 struct type
**arg_types
;
807 struct symbol
*function
= NULL
;
808 char *function_name
= NULL
;
811 op
= exp
->elts
[pc
].opcode
;
816 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
817 (*pos
) += 4 + BYTES_TO_EXP_ELEM (tem
+ 1);
818 if (noside
== EVAL_SKIP
)
820 arg1
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
821 &exp
->elts
[pc
+ 3].string
,
822 expect_type
, 0, noside
);
824 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
829 return value_from_longest (exp
->elts
[pc
+ 1].type
,
830 exp
->elts
[pc
+ 2].longconst
);
834 return value_from_double (exp
->elts
[pc
+ 1].type
,
835 exp
->elts
[pc
+ 2].doubleconst
);
839 return value_from_decfloat (exp
->elts
[pc
+ 1].type
,
840 exp
->elts
[pc
+ 2].decfloatconst
);
845 if (noside
== EVAL_SKIP
)
848 /* JYG: We used to just return value_zero of the symbol type
849 if we're asked to avoid side effects. Otherwise we return
850 value_of_variable (...). However I'm not sure if
851 value_of_variable () has any side effect.
852 We need a full value object returned here for whatis_exp ()
853 to call evaluate_type () and then pass the full value to
854 value_rtti_target_type () if we are dealing with a pointer
855 or reference to a base class and print object is on. */
858 volatile struct gdb_exception except
;
859 struct value
*ret
= NULL
;
861 TRY_CATCH (except
, RETURN_MASK_ERROR
)
863 ret
= value_of_variable (exp
->elts
[pc
+ 2].symbol
,
864 exp
->elts
[pc
+ 1].block
);
867 if (except
.reason
< 0)
869 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
870 ret
= value_zero (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
),
873 throw_exception (except
);
879 case OP_VAR_ENTRY_VALUE
:
881 if (noside
== EVAL_SKIP
)
885 struct symbol
*sym
= exp
->elts
[pc
+ 1].symbol
;
886 struct frame_info
*frame
;
888 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
889 return value_zero (SYMBOL_TYPE (sym
), not_lval
);
891 if (SYMBOL_CLASS (sym
) != LOC_COMPUTED
892 || SYMBOL_COMPUTED_OPS (sym
)->read_variable_at_entry
== NULL
)
893 error (_("Symbol \"%s\" does not have any specific entry value"),
894 SYMBOL_PRINT_NAME (sym
));
896 frame
= get_selected_frame (NULL
);
897 return SYMBOL_COMPUTED_OPS (sym
)->read_variable_at_entry (sym
, frame
);
903 access_value_history (longest_to_int (exp
->elts
[pc
+ 1].longconst
));
907 const char *name
= &exp
->elts
[pc
+ 2].string
;
911 (*pos
) += 3 + BYTES_TO_EXP_ELEM (exp
->elts
[pc
+ 1].longconst
+ 1);
912 regno
= user_reg_map_name_to_regnum (exp
->gdbarch
,
913 name
, strlen (name
));
915 error (_("Register $%s not available."), name
);
917 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
918 a value with the appropriate register type. Unfortunately,
919 we don't have easy access to the type of user registers.
920 So for these registers, we fetch the register value regardless
921 of the evaluation mode. */
922 if (noside
== EVAL_AVOID_SIDE_EFFECTS
923 && regno
< gdbarch_num_regs (exp
->gdbarch
)
924 + gdbarch_num_pseudo_regs (exp
->gdbarch
))
925 val
= value_zero (register_type (exp
->gdbarch
, regno
), not_lval
);
927 val
= value_of_register (regno
, get_selected_frame (NULL
));
929 error (_("Value of register %s not available."), name
);
935 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
936 return value_from_longest (type
, exp
->elts
[pc
+ 1].longconst
);
940 return value_of_internalvar (exp
->gdbarch
,
941 exp
->elts
[pc
+ 1].internalvar
);
944 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
945 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
946 if (noside
== EVAL_SKIP
)
948 type
= language_string_char_type (exp
->language_defn
, exp
->gdbarch
);
949 return value_string (&exp
->elts
[pc
+ 2].string
, tem
, type
);
951 case OP_OBJC_NSSTRING
: /* Objective C Foundation Class
952 NSString constant. */
953 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
954 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
955 if (noside
== EVAL_SKIP
)
959 return value_nsstring (exp
->gdbarch
, &exp
->elts
[pc
+ 2].string
, tem
+ 1);
962 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
964 += 3 + BYTES_TO_EXP_ELEM ((tem
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
);
965 if (noside
== EVAL_SKIP
)
967 return value_bitstring (&exp
->elts
[pc
+ 2].string
, tem
,
968 builtin_type (exp
->gdbarch
)->builtin_int
);
973 tem2
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
974 tem3
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
975 nargs
= tem3
- tem2
+ 1;
976 type
= expect_type
? check_typedef (expect_type
) : NULL_TYPE
;
978 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
979 && TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
981 struct value
*rec
= allocate_value (expect_type
);
983 memset (value_contents_raw (rec
), '\0', TYPE_LENGTH (type
));
984 return evaluate_struct_tuple (rec
, exp
, pos
, noside
, nargs
);
987 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
988 && TYPE_CODE (type
) == TYPE_CODE_ARRAY
)
990 struct type
*range_type
= TYPE_INDEX_TYPE (type
);
991 struct type
*element_type
= TYPE_TARGET_TYPE (type
);
992 struct value
*array
= allocate_value (expect_type
);
993 int element_size
= TYPE_LENGTH (check_typedef (element_type
));
994 LONGEST low_bound
, high_bound
, index
;
996 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
999 high_bound
= (TYPE_LENGTH (type
) / element_size
) - 1;
1002 memset (value_contents_raw (array
), 0, TYPE_LENGTH (expect_type
));
1003 for (tem
= nargs
; --nargs
>= 0;)
1005 struct value
*element
;
1008 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
1010 index_pc
= ++(*pos
);
1011 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
1013 element
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1014 if (value_type (element
) != element_type
)
1015 element
= value_cast (element_type
, element
);
1018 int continue_pc
= *pos
;
1021 index
= init_array_element (array
, element
, exp
, pos
, noside
,
1022 low_bound
, high_bound
);
1027 if (index
> high_bound
)
1028 /* To avoid memory corruption. */
1029 error (_("Too many array elements"));
1030 memcpy (value_contents_raw (array
)
1031 + (index
- low_bound
) * element_size
,
1032 value_contents (element
),
1040 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
1041 && TYPE_CODE (type
) == TYPE_CODE_SET
)
1043 struct value
*set
= allocate_value (expect_type
);
1044 gdb_byte
*valaddr
= value_contents_raw (set
);
1045 struct type
*element_type
= TYPE_INDEX_TYPE (type
);
1046 struct type
*check_type
= element_type
;
1047 LONGEST low_bound
, high_bound
;
1049 /* Get targettype of elementtype. */
1050 while (TYPE_CODE (check_type
) == TYPE_CODE_RANGE
1051 || TYPE_CODE (check_type
) == TYPE_CODE_TYPEDEF
)
1052 check_type
= TYPE_TARGET_TYPE (check_type
);
1054 if (get_discrete_bounds (element_type
, &low_bound
, &high_bound
) < 0)
1055 error (_("(power)set type with unknown size"));
1056 memset (valaddr
, '\0', TYPE_LENGTH (type
));
1057 for (tem
= 0; tem
< nargs
; tem
++)
1059 LONGEST range_low
, range_high
;
1060 struct type
*range_low_type
, *range_high_type
;
1061 struct value
*elem_val
;
1063 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
1066 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1067 range_low_type
= value_type (elem_val
);
1068 range_low
= value_as_long (elem_val
);
1069 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1070 range_high_type
= value_type (elem_val
);
1071 range_high
= value_as_long (elem_val
);
1075 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1076 range_low_type
= range_high_type
= value_type (elem_val
);
1077 range_low
= range_high
= value_as_long (elem_val
);
1079 /* Check types of elements to avoid mixture of elements from
1080 different types. Also check if type of element is "compatible"
1081 with element type of powerset. */
1082 if (TYPE_CODE (range_low_type
) == TYPE_CODE_RANGE
)
1083 range_low_type
= TYPE_TARGET_TYPE (range_low_type
);
1084 if (TYPE_CODE (range_high_type
) == TYPE_CODE_RANGE
)
1085 range_high_type
= TYPE_TARGET_TYPE (range_high_type
);
1086 if ((TYPE_CODE (range_low_type
) != TYPE_CODE (range_high_type
))
1087 || (TYPE_CODE (range_low_type
) == TYPE_CODE_ENUM
1088 && (range_low_type
!= range_high_type
)))
1089 /* different element modes. */
1090 error (_("POWERSET tuple elements of different mode"));
1091 if ((TYPE_CODE (check_type
) != TYPE_CODE (range_low_type
))
1092 || (TYPE_CODE (check_type
) == TYPE_CODE_ENUM
1093 && range_low_type
!= check_type
))
1094 error (_("incompatible POWERSET tuple elements"));
1095 if (range_low
> range_high
)
1097 warning (_("empty POWERSET tuple range"));
1100 if (range_low
< low_bound
|| range_high
> high_bound
)
1101 error (_("POWERSET tuple element out of range"));
1102 range_low
-= low_bound
;
1103 range_high
-= low_bound
;
1104 for (; range_low
<= range_high
; range_low
++)
1106 int bit_index
= (unsigned) range_low
% TARGET_CHAR_BIT
;
1108 if (gdbarch_bits_big_endian (exp
->gdbarch
))
1109 bit_index
= TARGET_CHAR_BIT
- 1 - bit_index
;
1110 valaddr
[(unsigned) range_low
/ TARGET_CHAR_BIT
]
1117 argvec
= (struct value
**) alloca (sizeof (struct value
*) * nargs
);
1118 for (tem
= 0; tem
< nargs
; tem
++)
1120 /* Ensure that array expressions are coerced into pointer
1122 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1124 if (noside
== EVAL_SKIP
)
1126 return value_array (tem2
, tem3
, argvec
);
1130 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1132 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1134 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1136 if (noside
== EVAL_SKIP
)
1138 return value_slice (array
, lowbound
, upper
- lowbound
+ 1);
1141 case TERNOP_SLICE_COUNT
:
1143 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1145 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1147 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1149 return value_slice (array
, lowbound
, length
);
1153 /* Skip third and second args to evaluate the first one. */
1154 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1155 if (value_logical_not (arg1
))
1157 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
1158 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1162 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1163 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
1167 case OP_OBJC_SELECTOR
:
1168 { /* Objective C @selector operator. */
1169 char *sel
= &exp
->elts
[pc
+ 2].string
;
1170 int len
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1171 struct type
*selector_type
;
1173 (*pos
) += 3 + BYTES_TO_EXP_ELEM (len
+ 1);
1174 if (noside
== EVAL_SKIP
)
1178 sel
[len
] = 0; /* Make sure it's terminated. */
1180 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1181 return value_from_longest (selector_type
,
1182 lookup_child_selector (exp
->gdbarch
, sel
));
1185 case OP_OBJC_MSGCALL
:
1186 { /* Objective C message (method) call. */
1188 CORE_ADDR responds_selector
= 0;
1189 CORE_ADDR method_selector
= 0;
1191 CORE_ADDR selector
= 0;
1193 int struct_return
= 0;
1194 int sub_no_side
= 0;
1196 struct value
*msg_send
= NULL
;
1197 struct value
*msg_send_stret
= NULL
;
1198 int gnu_runtime
= 0;
1200 struct value
*target
= NULL
;
1201 struct value
*method
= NULL
;
1202 struct value
*called_method
= NULL
;
1204 struct type
*selector_type
= NULL
;
1205 struct type
*long_type
;
1207 struct value
*ret
= NULL
;
1210 selector
= exp
->elts
[pc
+ 1].longconst
;
1211 nargs
= exp
->elts
[pc
+ 2].longconst
;
1212 argvec
= (struct value
**) alloca (sizeof (struct value
*)
1217 long_type
= builtin_type (exp
->gdbarch
)->builtin_long
;
1218 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1220 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1221 sub_no_side
= EVAL_NORMAL
;
1223 sub_no_side
= noside
;
1225 target
= evaluate_subexp (selector_type
, exp
, pos
, sub_no_side
);
1227 if (value_as_long (target
) == 0)
1228 return value_from_longest (long_type
, 0);
1230 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1233 /* Find the method dispatch (Apple runtime) or method lookup
1234 (GNU runtime) function for Objective-C. These will be used
1235 to lookup the symbol information for the method. If we
1236 can't find any symbol information, then we'll use these to
1237 call the method, otherwise we can call the method
1238 directly. The msg_send_stret function is used in the special
1239 case of a method that returns a structure (Apple runtime
1243 struct type
*type
= selector_type
;
1245 type
= lookup_function_type (type
);
1246 type
= lookup_pointer_type (type
);
1247 type
= lookup_function_type (type
);
1248 type
= lookup_pointer_type (type
);
1250 msg_send
= find_function_in_inferior ("objc_msg_lookup", NULL
);
1252 = find_function_in_inferior ("objc_msg_lookup", NULL
);
1254 msg_send
= value_from_pointer (type
, value_as_address (msg_send
));
1255 msg_send_stret
= value_from_pointer (type
,
1256 value_as_address (msg_send_stret
));
1260 msg_send
= find_function_in_inferior ("objc_msgSend", NULL
);
1261 /* Special dispatcher for methods returning structs. */
1263 = find_function_in_inferior ("objc_msgSend_stret", NULL
);
1266 /* Verify the target object responds to this method. The
1267 standard top-level 'Object' class uses a different name for
1268 the verification method than the non-standard, but more
1269 often used, 'NSObject' class. Make sure we check for both. */
1272 = lookup_child_selector (exp
->gdbarch
, "respondsToSelector:");
1273 if (responds_selector
== 0)
1275 = lookup_child_selector (exp
->gdbarch
, "respondsTo:");
1277 if (responds_selector
== 0)
1278 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1281 = lookup_child_selector (exp
->gdbarch
, "methodForSelector:");
1282 if (method_selector
== 0)
1284 = lookup_child_selector (exp
->gdbarch
, "methodFor:");
1286 if (method_selector
== 0)
1287 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1289 /* Call the verification method, to make sure that the target
1290 class implements the desired method. */
1292 argvec
[0] = msg_send
;
1294 argvec
[2] = value_from_longest (long_type
, responds_selector
);
1295 argvec
[3] = value_from_longest (long_type
, selector
);
1298 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1301 /* Function objc_msg_lookup returns a pointer. */
1303 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1305 if (value_as_long (ret
) == 0)
1306 error (_("Target does not respond to this message selector."));
1308 /* Call "methodForSelector:" method, to get the address of a
1309 function method that implements this selector for this
1310 class. If we can find a symbol at that address, then we
1311 know the return type, parameter types etc. (that's a good
1314 argvec
[0] = msg_send
;
1316 argvec
[2] = value_from_longest (long_type
, method_selector
);
1317 argvec
[3] = value_from_longest (long_type
, selector
);
1320 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1324 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1327 /* ret should now be the selector. */
1329 addr
= value_as_long (ret
);
1332 struct symbol
*sym
= NULL
;
1334 /* The address might point to a function descriptor;
1335 resolve it to the actual code address instead. */
1336 addr
= gdbarch_convert_from_func_ptr_addr (exp
->gdbarch
, addr
,
1339 /* Is it a high_level symbol? */
1340 sym
= find_pc_function (addr
);
1342 method
= value_of_variable (sym
, 0);
1345 /* If we found a method with symbol information, check to see
1346 if it returns a struct. Otherwise assume it doesn't. */
1351 struct type
*val_type
;
1353 funaddr
= find_function_addr (method
, &val_type
);
1355 block_for_pc (funaddr
);
1357 CHECK_TYPEDEF (val_type
);
1359 if ((val_type
== NULL
)
1360 || (TYPE_CODE(val_type
) == TYPE_CODE_ERROR
))
1362 if (expect_type
!= NULL
)
1363 val_type
= expect_type
;
1366 struct_return
= using_struct_return (exp
->gdbarch
, method
,
1369 else if (expect_type
!= NULL
)
1371 struct_return
= using_struct_return (exp
->gdbarch
, NULL
,
1372 check_typedef (expect_type
));
1375 /* Found a function symbol. Now we will substitute its
1376 value in place of the message dispatcher (obj_msgSend),
1377 so that we call the method directly instead of thru
1378 the dispatcher. The main reason for doing this is that
1379 we can now evaluate the return value and parameter values
1380 according to their known data types, in case we need to
1381 do things like promotion, dereferencing, special handling
1382 of structs and doubles, etc.
1384 We want to use the type signature of 'method', but still
1385 jump to objc_msgSend() or objc_msgSend_stret() to better
1386 mimic the behavior of the runtime. */
1390 if (TYPE_CODE (value_type (method
)) != TYPE_CODE_FUNC
)
1391 error (_("method address has symbol information "
1392 "with non-function type; skipping"));
1394 /* Create a function pointer of the appropriate type, and
1395 replace its value with the value of msg_send or
1396 msg_send_stret. We must use a pointer here, as
1397 msg_send and msg_send_stret are of pointer type, and
1398 the representation may be different on systems that use
1399 function descriptors. */
1402 = value_from_pointer (lookup_pointer_type (value_type (method
)),
1403 value_as_address (msg_send_stret
));
1406 = value_from_pointer (lookup_pointer_type (value_type (method
)),
1407 value_as_address (msg_send
));
1412 called_method
= msg_send_stret
;
1414 called_method
= msg_send
;
1417 if (noside
== EVAL_SKIP
)
1420 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1422 /* If the return type doesn't look like a function type,
1423 call an error. This can happen if somebody tries to
1424 turn a variable into a function call. This is here
1425 because people often want to call, eg, strcmp, which
1426 gdb doesn't know is a function. If gdb isn't asked for
1427 it's opinion (ie. through "whatis"), it won't offer
1430 struct type
*type
= value_type (called_method
);
1432 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1433 type
= TYPE_TARGET_TYPE (type
);
1434 type
= TYPE_TARGET_TYPE (type
);
1438 if ((TYPE_CODE (type
) == TYPE_CODE_ERROR
) && expect_type
)
1439 return allocate_value (expect_type
);
1441 return allocate_value (type
);
1444 error (_("Expression of type other than "
1445 "\"method returning ...\" used as a method"));
1448 /* Now depending on whether we found a symbol for the method,
1449 we will either call the runtime dispatcher or the method
1452 argvec
[0] = called_method
;
1454 argvec
[2] = value_from_longest (long_type
, selector
);
1455 /* User-supplied arguments. */
1456 for (tem
= 0; tem
< nargs
; tem
++)
1457 argvec
[tem
+ 3] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1458 argvec
[tem
+ 3] = 0;
1460 if (gnu_runtime
&& (method
!= NULL
))
1462 /* Function objc_msg_lookup returns a pointer. */
1463 deprecated_set_value_type (argvec
[0],
1464 lookup_pointer_type (lookup_function_type (value_type (argvec
[0]))));
1466 = call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1469 ret
= call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1476 op
= exp
->elts
[*pos
].opcode
;
1477 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1478 /* Allocate arg vector, including space for the function to be
1479 called in argvec[0] and a terminating NULL. */
1480 argvec
= (struct value
**)
1481 alloca (sizeof (struct value
*) * (nargs
+ 3));
1482 if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1485 /* First, evaluate the structure into arg2. */
1488 if (noside
== EVAL_SKIP
)
1491 if (op
== STRUCTOP_MEMBER
)
1493 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1497 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1500 /* If the function is a virtual function, then the
1501 aggregate value (providing the structure) plays
1502 its part by providing the vtable. Otherwise,
1503 it is just along for the ride: call the function
1506 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1508 if (TYPE_CODE (check_typedef (value_type (arg1
)))
1509 != TYPE_CODE_METHODPTR
)
1510 error (_("Non-pointer-to-member value used in pointer-to-member "
1513 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1515 struct type
*method_type
= check_typedef (value_type (arg1
));
1517 arg1
= value_zero (method_type
, not_lval
);
1520 arg1
= cplus_method_ptr_to_value (&arg2
, arg1
);
1522 /* Now, say which argument to start evaluating from. */
1525 else if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
)
1527 /* Hair for method invocations. */
1531 /* First, evaluate the structure into arg2. */
1533 tem2
= longest_to_int (exp
->elts
[pc2
+ 1].longconst
);
1534 *pos
+= 3 + BYTES_TO_EXP_ELEM (tem2
+ 1);
1535 if (noside
== EVAL_SKIP
)
1538 if (op
== STRUCTOP_STRUCT
)
1540 /* If v is a variable in a register, and the user types
1541 v.method (), this will produce an error, because v has
1544 A possible way around this would be to allocate a
1545 copy of the variable on the stack, copy in the
1546 contents, call the function, and copy out the
1547 contents. I.e. convert this from call by reference
1548 to call by copy-return (or whatever it's called).
1549 However, this does not work because it is not the
1550 same: the method being called could stash a copy of
1551 the address, and then future uses through that address
1552 (after the method returns) would be expected to
1553 use the variable itself, not some copy of it. */
1554 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1558 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1560 /* Check to see if the operator '->' has been
1561 overloaded. If the operator has been overloaded
1562 replace arg2 with the value returned by the custom
1563 operator and continue evaluation. */
1564 while (unop_user_defined_p (op
, arg2
))
1566 volatile struct gdb_exception except
;
1567 struct value
*value
= NULL
;
1568 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1570 value
= value_x_unop (arg2
, op
, noside
);
1573 if (except
.reason
< 0)
1575 if (except
.error
== NOT_FOUND_ERROR
)
1578 throw_exception (except
);
1583 /* Now, say which argument to start evaluating from. */
1586 else if (op
== OP_SCOPE
1587 && overload_resolution
1588 && (exp
->language_defn
->la_language
== language_cplus
))
1590 /* Unpack it locally so we can properly handle overload
1596 local_tem
= longest_to_int (exp
->elts
[pc2
+ 2].longconst
);
1597 (*pos
) += 4 + BYTES_TO_EXP_ELEM (local_tem
+ 1);
1598 type
= exp
->elts
[pc2
+ 1].type
;
1599 name
= &exp
->elts
[pc2
+ 3].string
;
1602 function_name
= NULL
;
1603 if (TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
1605 function
= cp_lookup_symbol_namespace (TYPE_TAG_NAME (type
),
1607 get_selected_block (0),
1609 if (function
== NULL
)
1610 error (_("No symbol \"%s\" in namespace \"%s\"."),
1611 name
, TYPE_TAG_NAME (type
));
1617 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1618 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1619 function_name
= name
;
1621 arg2
= value_zero (type
, lval_memory
);
1626 else if (op
== OP_ADL_FUNC
)
1628 /* Save the function position and move pos so that the arguments
1629 can be evaluated. */
1635 func_name_len
= longest_to_int (exp
->elts
[save_pos1
+ 3].longconst
);
1636 (*pos
) += 6 + BYTES_TO_EXP_ELEM (func_name_len
+ 1);
1640 /* Non-method function call. */
1644 /* If this is a C++ function wait until overload resolution. */
1645 if (op
== OP_VAR_VALUE
1646 && overload_resolution
1647 && (exp
->language_defn
->la_language
== language_cplus
))
1649 (*pos
) += 4; /* Skip the evaluation of the symbol. */
1654 argvec
[0] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1655 type
= value_type (argvec
[0]);
1656 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1657 type
= TYPE_TARGET_TYPE (type
);
1658 if (type
&& TYPE_CODE (type
) == TYPE_CODE_FUNC
)
1660 for (; tem
<= nargs
&& tem
<= TYPE_NFIELDS (type
); tem
++)
1662 argvec
[tem
] = evaluate_subexp (TYPE_FIELD_TYPE (type
,
1670 /* Evaluate arguments. */
1671 for (; tem
<= nargs
; tem
++)
1673 /* Ensure that array expressions are coerced into pointer
1675 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1678 /* Signal end of arglist. */
1680 if (op
== OP_ADL_FUNC
)
1682 struct symbol
*symp
;
1685 int string_pc
= save_pos1
+ 3;
1687 /* Extract the function name. */
1688 name_len
= longest_to_int (exp
->elts
[string_pc
].longconst
);
1689 func_name
= (char *) alloca (name_len
+ 1);
1690 strcpy (func_name
, &exp
->elts
[string_pc
+ 1].string
);
1692 find_overload_match (&argvec
[1], nargs
, func_name
,
1693 NON_METHOD
, /* not method */
1694 0, /* strict match */
1695 NULL
, NULL
, /* pass NULL symbol since
1696 symbol is unknown */
1697 NULL
, &symp
, NULL
, 0);
1699 /* Now fix the expression being evaluated. */
1700 exp
->elts
[save_pos1
+ 2].symbol
= symp
;
1701 argvec
[0] = evaluate_subexp_with_coercion (exp
, &save_pos1
, noside
);
1704 if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
1705 || (op
== OP_SCOPE
&& function_name
!= NULL
))
1707 int static_memfuncp
;
1710 /* Method invocation : stuff "this" as first parameter. */
1715 /* Name of method from expression. */
1716 tstr
= &exp
->elts
[pc2
+ 2].string
;
1719 tstr
= function_name
;
1721 if (overload_resolution
&& (exp
->language_defn
->la_language
1724 /* Language is C++, do some overload resolution before
1726 struct value
*valp
= NULL
;
1728 (void) find_overload_match (&argvec
[1], nargs
, tstr
,
1729 METHOD
, /* method */
1730 0, /* strict match */
1731 &arg2
, /* the object */
1733 &static_memfuncp
, 0);
1735 if (op
== OP_SCOPE
&& !static_memfuncp
)
1737 /* For the time being, we don't handle this. */
1738 error (_("Call to overloaded function %s requires "
1742 argvec
[1] = arg2
; /* the ``this'' pointer */
1743 argvec
[0] = valp
; /* Use the method found after overload
1747 /* Non-C++ case -- or no overload resolution. */
1749 struct value
*temp
= arg2
;
1751 argvec
[0] = value_struct_elt (&temp
, argvec
+ 1, tstr
,
1753 op
== STRUCTOP_STRUCT
1754 ? "structure" : "structure pointer");
1755 /* value_struct_elt updates temp with the correct value
1756 of the ``this'' pointer if necessary, so modify argvec[1] to
1757 reflect any ``this'' changes. */
1759 = value_from_longest (lookup_pointer_type(value_type (temp
)),
1760 value_address (temp
)
1761 + value_embedded_offset (temp
));
1762 argvec
[1] = arg2
; /* the ``this'' pointer */
1765 if (static_memfuncp
)
1767 argvec
[1] = argvec
[0];
1772 else if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1777 else if (op
== OP_VAR_VALUE
|| (op
== OP_SCOPE
&& function
!= NULL
))
1779 /* Non-member function being called. */
1780 /* fn: This can only be done for C++ functions. A C-style function
1781 in a C++ program, for instance, does not have the fields that
1782 are expected here. */
1784 if (overload_resolution
&& (exp
->language_defn
->la_language
1787 /* Language is C++, do some overload resolution before
1789 struct symbol
*symp
;
1792 /* If a scope has been specified disable ADL. */
1796 if (op
== OP_VAR_VALUE
)
1797 function
= exp
->elts
[save_pos1
+2].symbol
;
1799 (void) find_overload_match (&argvec
[1], nargs
,
1800 NULL
, /* no need for name */
1801 NON_METHOD
, /* not method */
1802 0, /* strict match */
1803 NULL
, function
, /* the function */
1804 NULL
, &symp
, NULL
, no_adl
);
1806 if (op
== OP_VAR_VALUE
)
1808 /* Now fix the expression being evaluated. */
1809 exp
->elts
[save_pos1
+2].symbol
= symp
;
1810 argvec
[0] = evaluate_subexp_with_coercion (exp
, &save_pos1
,
1814 argvec
[0] = value_of_variable (symp
, get_selected_block (0));
1818 /* Not C++, or no overload resolution allowed. */
1819 /* Nothing to be done; argvec already correctly set up. */
1824 /* It is probably a C-style function. */
1825 /* Nothing to be done; argvec already correctly set up. */
1830 if (noside
== EVAL_SKIP
)
1832 if (argvec
[0] == NULL
)
1833 error (_("Cannot evaluate function -- may be inlined"));
1834 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1836 /* If the return type doesn't look like a function type, call an
1837 error. This can happen if somebody tries to turn a variable into
1838 a function call. This is here because people often want to
1839 call, eg, strcmp, which gdb doesn't know is a function. If
1840 gdb isn't asked for it's opinion (ie. through "whatis"),
1841 it won't offer it. */
1843 struct type
*ftype
= value_type (argvec
[0]);
1845 if (TYPE_CODE (ftype
) == TYPE_CODE_INTERNAL_FUNCTION
)
1847 /* We don't know anything about what the internal
1848 function might return, but we have to return
1850 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
1853 else if (TYPE_GNU_IFUNC (ftype
))
1854 return allocate_value (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (ftype
)));
1855 else if (TYPE_TARGET_TYPE (ftype
))
1856 return allocate_value (TYPE_TARGET_TYPE (ftype
));
1858 error (_("Expression of type other than "
1859 "\"Function returning ...\" used as function"));
1861 if (TYPE_CODE (value_type (argvec
[0])) == TYPE_CODE_INTERNAL_FUNCTION
)
1862 return call_internal_function (exp
->gdbarch
, exp
->language_defn
,
1863 argvec
[0], nargs
, argvec
+ 1);
1865 return call_function_by_hand (argvec
[0], nargs
, argvec
+ 1);
1866 /* pai: FIXME save value from call_function_by_hand, then adjust
1867 pc by adjust_fn_pc if +ve. */
1869 case OP_F77_UNDETERMINED_ARGLIST
:
1871 /* Remember that in F77, functions, substring ops and
1872 array subscript operations cannot be disambiguated
1873 at parse time. We have made all array subscript operations,
1874 substring operations as well as function calls come here
1875 and we now have to discover what the heck this thing actually was.
1876 If it is a function, we process just as if we got an OP_FUNCALL. */
1878 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1881 /* First determine the type code we are dealing with. */
1882 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1883 type
= check_typedef (value_type (arg1
));
1884 code
= TYPE_CODE (type
);
1886 if (code
== TYPE_CODE_PTR
)
1888 /* Fortran always passes variable to subroutines as pointer.
1889 So we need to look into its target type to see if it is
1890 array, string or function. If it is, we need to switch
1891 to the target value the original one points to. */
1892 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1894 if (TYPE_CODE (target_type
) == TYPE_CODE_ARRAY
1895 || TYPE_CODE (target_type
) == TYPE_CODE_STRING
1896 || TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
1898 arg1
= value_ind (arg1
);
1899 type
= check_typedef (value_type (arg1
));
1900 code
= TYPE_CODE (type
);
1906 case TYPE_CODE_ARRAY
:
1907 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1908 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1910 goto multi_f77_subscript
;
1912 case TYPE_CODE_STRING
:
1913 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1914 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1917 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1918 return value_subscript (arg1
, value_as_long (arg2
));
1922 case TYPE_CODE_FUNC
:
1923 /* It's a function call. */
1924 /* Allocate arg vector, including space for the function to be
1925 called in argvec[0] and a terminating NULL. */
1926 argvec
= (struct value
**)
1927 alloca (sizeof (struct value
*) * (nargs
+ 2));
1930 for (; tem
<= nargs
; tem
++)
1931 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1932 argvec
[tem
] = 0; /* signal end of arglist */
1936 error (_("Cannot perform substring on this type"));
1940 /* We have a complex number, There should be 2 floating
1941 point numbers that compose it. */
1943 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1944 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1946 return value_literal_complex (arg1
, arg2
, exp
->elts
[pc
+ 1].type
);
1948 case STRUCTOP_STRUCT
:
1949 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1950 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1951 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1952 if (noside
== EVAL_SKIP
)
1954 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1955 return value_zero (lookup_struct_elt_type (value_type (arg1
),
1956 &exp
->elts
[pc
+ 2].string
,
1961 struct value
*temp
= arg1
;
1963 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
1968 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1969 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1970 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1971 if (noside
== EVAL_SKIP
)
1974 /* Check to see if operator '->' has been overloaded. If so replace
1975 arg1 with the value returned by evaluating operator->(). */
1976 while (unop_user_defined_p (op
, arg1
))
1978 volatile struct gdb_exception except
;
1979 struct value
*value
= NULL
;
1980 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1982 value
= value_x_unop (arg1
, op
, noside
);
1985 if (except
.reason
< 0)
1987 if (except
.error
== NOT_FOUND_ERROR
)
1990 throw_exception (except
);
1995 /* JYG: if print object is on we need to replace the base type
1996 with rtti type in order to continue on with successful
1997 lookup of member / method only available in the rtti type. */
1999 struct type
*type
= value_type (arg1
);
2000 struct type
*real_type
;
2001 int full
, top
, using_enc
;
2002 struct value_print_options opts
;
2004 get_user_print_options (&opts
);
2005 if (opts
.objectprint
&& TYPE_TARGET_TYPE(type
)
2006 && (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_CLASS
))
2008 real_type
= value_rtti_indirect_type (arg1
, &full
, &top
,
2011 arg1
= value_cast (real_type
, arg1
);
2015 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2016 return value_zero (lookup_struct_elt_type (value_type (arg1
),
2017 &exp
->elts
[pc
+ 2].string
,
2022 struct value
*temp
= arg1
;
2024 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
2025 NULL
, "structure pointer");
2028 case STRUCTOP_MEMBER
:
2030 if (op
== STRUCTOP_MEMBER
)
2031 arg1
= evaluate_subexp_for_address (exp
, pos
, noside
);
2033 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2035 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2037 if (noside
== EVAL_SKIP
)
2040 type
= check_typedef (value_type (arg2
));
2041 switch (TYPE_CODE (type
))
2043 case TYPE_CODE_METHODPTR
:
2044 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2045 return value_zero (TYPE_TARGET_TYPE (type
), not_lval
);
2048 arg2
= cplus_method_ptr_to_value (&arg1
, arg2
);
2049 gdb_assert (TYPE_CODE (value_type (arg2
)) == TYPE_CODE_PTR
);
2050 return value_ind (arg2
);
2053 case TYPE_CODE_MEMBERPTR
:
2054 /* Now, convert these values to an address. */
2055 arg1
= value_cast_pointers (lookup_pointer_type (TYPE_DOMAIN_TYPE (type
)),
2058 mem_offset
= value_as_long (arg2
);
2060 arg3
= value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2061 value_as_long (arg1
) + mem_offset
);
2062 return value_ind (arg3
);
2065 error (_("non-pointer-to-member value used "
2066 "in pointer-to-member construct"));
2070 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
2071 arg_types
= (struct type
**) alloca (nargs
* sizeof (struct type
*));
2072 for (ix
= 0; ix
< nargs
; ++ix
)
2073 arg_types
[ix
] = exp
->elts
[pc
+ 1 + ix
+ 1].type
;
2075 expect_type
= make_params (nargs
, arg_types
);
2076 *(pos
) += 3 + nargs
;
2077 arg1
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
2078 xfree (TYPE_FIELDS (expect_type
));
2079 xfree (TYPE_MAIN_TYPE (expect_type
));
2080 xfree (expect_type
);
2084 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2085 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2086 if (noside
== EVAL_SKIP
)
2088 if (binop_user_defined_p (op
, arg1
, arg2
))
2089 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2091 return value_concat (arg1
, arg2
);
2094 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2095 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2097 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2099 if (binop_user_defined_p (op
, arg1
, arg2
))
2100 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2102 return value_assign (arg1
, arg2
);
2104 case BINOP_ASSIGN_MODIFY
:
2106 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2107 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2108 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2110 op
= exp
->elts
[pc
+ 1].opcode
;
2111 if (binop_user_defined_p (op
, arg1
, arg2
))
2112 return value_x_binop (arg1
, arg2
, BINOP_ASSIGN_MODIFY
, op
, noside
);
2113 else if (op
== BINOP_ADD
&& ptrmath_type_p (exp
->language_defn
,
2115 && is_integral_type (value_type (arg2
)))
2116 arg2
= value_ptradd (arg1
, value_as_long (arg2
));
2117 else if (op
== BINOP_SUB
&& ptrmath_type_p (exp
->language_defn
,
2119 && is_integral_type (value_type (arg2
)))
2120 arg2
= value_ptradd (arg1
, - value_as_long (arg2
));
2123 struct value
*tmp
= arg1
;
2125 /* For shift and integer exponentiation operations,
2126 only promote the first argument. */
2127 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
2128 && is_integral_type (value_type (arg2
)))
2129 unop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
);
2131 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2133 arg2
= value_binop (tmp
, arg2
, op
);
2135 return value_assign (arg1
, arg2
);
2138 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2139 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2140 if (noside
== EVAL_SKIP
)
2142 if (binop_user_defined_p (op
, arg1
, arg2
))
2143 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2144 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
))
2145 && is_integral_type (value_type (arg2
)))
2146 return value_ptradd (arg1
, value_as_long (arg2
));
2147 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg2
))
2148 && is_integral_type (value_type (arg1
)))
2149 return value_ptradd (arg2
, value_as_long (arg1
));
2152 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2153 return value_binop (arg1
, arg2
, BINOP_ADD
);
2157 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2158 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2159 if (noside
== EVAL_SKIP
)
2161 if (binop_user_defined_p (op
, arg1
, arg2
))
2162 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2163 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
))
2164 && ptrmath_type_p (exp
->language_defn
, value_type (arg2
)))
2166 /* FIXME -- should be ptrdiff_t */
2167 type
= builtin_type (exp
->gdbarch
)->builtin_long
;
2168 return value_from_longest (type
, value_ptrdiff (arg1
, arg2
));
2170 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
))
2171 && is_integral_type (value_type (arg2
)))
2172 return value_ptradd (arg1
, - value_as_long (arg2
));
2175 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2176 return value_binop (arg1
, arg2
, BINOP_SUB
);
2187 case BINOP_BITWISE_AND
:
2188 case BINOP_BITWISE_IOR
:
2189 case BINOP_BITWISE_XOR
:
2190 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2191 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2192 if (noside
== EVAL_SKIP
)
2194 if (binop_user_defined_p (op
, arg1
, arg2
))
2195 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2198 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2199 fudge arg2 to avoid division-by-zero, the caller is
2200 (theoretically) only looking for the type of the result. */
2201 if (noside
== EVAL_AVOID_SIDE_EFFECTS
2202 /* ??? Do we really want to test for BINOP_MOD here?
2203 The implementation of value_binop gives it a well-defined
2206 || op
== BINOP_INTDIV
2209 && value_logical_not (arg2
))
2211 struct value
*v_one
, *retval
;
2213 v_one
= value_one (value_type (arg2
));
2214 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &v_one
);
2215 retval
= value_binop (arg1
, v_one
, op
);
2220 /* For shift and integer exponentiation operations,
2221 only promote the first argument. */
2222 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
2223 && is_integral_type (value_type (arg2
)))
2224 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2226 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2228 return value_binop (arg1
, arg2
, op
);
2233 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2234 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2235 if (noside
== EVAL_SKIP
)
2237 error (_("':' operator used in invalid context"));
2239 case BINOP_SUBSCRIPT
:
2240 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2241 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2242 if (noside
== EVAL_SKIP
)
2244 if (binop_user_defined_p (op
, arg1
, arg2
))
2245 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2248 /* If the user attempts to subscript something that is not an
2249 array or pointer type (like a plain int variable for example),
2250 then report this as an error. */
2252 arg1
= coerce_ref (arg1
);
2253 type
= check_typedef (value_type (arg1
));
2254 if (TYPE_CODE (type
) != TYPE_CODE_ARRAY
2255 && TYPE_CODE (type
) != TYPE_CODE_PTR
)
2257 if (TYPE_NAME (type
))
2258 error (_("cannot subscript something of type `%s'"),
2261 error (_("cannot subscript requested type"));
2264 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2265 return value_zero (TYPE_TARGET_TYPE (type
), VALUE_LVAL (arg1
));
2267 return value_subscript (arg1
, value_as_long (arg2
));
2271 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2272 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2273 if (noside
== EVAL_SKIP
)
2275 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2276 return value_from_longest (type
, (LONGEST
) value_in (arg1
, arg2
));
2278 case MULTI_SUBSCRIPT
:
2280 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
2281 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2284 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2285 /* FIXME: EVAL_SKIP handling may not be correct. */
2286 if (noside
== EVAL_SKIP
)
2297 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2298 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2300 /* If the user attempts to subscript something that has no target
2301 type (like a plain int variable for example), then report this
2304 type
= TYPE_TARGET_TYPE (check_typedef (value_type (arg1
)));
2307 arg1
= value_zero (type
, VALUE_LVAL (arg1
));
2313 error (_("cannot subscript something of type `%s'"),
2314 TYPE_NAME (value_type (arg1
)));
2318 if (binop_user_defined_p (op
, arg1
, arg2
))
2320 arg1
= value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2324 arg1
= coerce_ref (arg1
);
2325 type
= check_typedef (value_type (arg1
));
2327 switch (TYPE_CODE (type
))
2330 case TYPE_CODE_ARRAY
:
2331 case TYPE_CODE_STRING
:
2332 arg1
= value_subscript (arg1
, value_as_long (arg2
));
2335 case TYPE_CODE_BITSTRING
:
2336 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2337 arg1
= value_bitstring_subscript (type
, arg1
,
2338 value_as_long (arg2
));
2342 if (TYPE_NAME (type
))
2343 error (_("cannot subscript something of type `%s'"),
2346 error (_("cannot subscript requested type"));
2352 multi_f77_subscript
:
2354 LONGEST subscript_array
[MAX_FORTRAN_DIMS
];
2355 int ndimensions
= 1, i
;
2356 struct value
*array
= arg1
;
2358 if (nargs
> MAX_FORTRAN_DIMS
)
2359 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS
);
2361 ndimensions
= calc_f77_array_dims (type
);
2363 if (nargs
!= ndimensions
)
2364 error (_("Wrong number of subscripts"));
2366 gdb_assert (nargs
> 0);
2368 /* Now that we know we have a legal array subscript expression
2369 let us actually find out where this element exists in the array. */
2371 /* Take array indices left to right. */
2372 for (i
= 0; i
< nargs
; i
++)
2374 /* Evaluate each subscript; it must be a legal integer in F77. */
2375 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2377 /* Fill in the subscript array. */
2379 subscript_array
[i
] = value_as_long (arg2
);
2382 /* Internal type of array is arranged right to left. */
2383 for (i
= nargs
; i
> 0; i
--)
2385 struct type
*array_type
= check_typedef (value_type (array
));
2386 LONGEST index
= subscript_array
[i
- 1];
2388 lower
= f77_get_lowerbound (array_type
);
2389 array
= value_subscripted_rvalue (array
, index
, lower
);
2395 case BINOP_LOGICAL_AND
:
2396 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2397 if (noside
== EVAL_SKIP
)
2399 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2404 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2407 if (binop_user_defined_p (op
, arg1
, arg2
))
2409 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2410 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2414 tem
= value_logical_not (arg1
);
2415 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2416 (tem
? EVAL_SKIP
: noside
));
2417 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2418 return value_from_longest (type
,
2419 (LONGEST
) (!tem
&& !value_logical_not (arg2
)));
2422 case BINOP_LOGICAL_OR
:
2423 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2424 if (noside
== EVAL_SKIP
)
2426 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2431 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2434 if (binop_user_defined_p (op
, arg1
, arg2
))
2436 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2437 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2441 tem
= value_logical_not (arg1
);
2442 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2443 (!tem
? EVAL_SKIP
: noside
));
2444 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2445 return value_from_longest (type
,
2446 (LONGEST
) (!tem
|| !value_logical_not (arg2
)));
2450 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2451 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2452 if (noside
== EVAL_SKIP
)
2454 if (binop_user_defined_p (op
, arg1
, arg2
))
2456 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2460 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2461 tem
= value_equal (arg1
, arg2
);
2462 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2463 return value_from_longest (type
, (LONGEST
) tem
);
2466 case BINOP_NOTEQUAL
:
2467 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2468 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2469 if (noside
== EVAL_SKIP
)
2471 if (binop_user_defined_p (op
, arg1
, arg2
))
2473 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2477 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2478 tem
= value_equal (arg1
, arg2
);
2479 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2480 return value_from_longest (type
, (LONGEST
) ! tem
);
2484 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2485 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2486 if (noside
== EVAL_SKIP
)
2488 if (binop_user_defined_p (op
, arg1
, arg2
))
2490 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2494 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2495 tem
= value_less (arg1
, arg2
);
2496 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2497 return value_from_longest (type
, (LONGEST
) tem
);
2501 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2502 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2503 if (noside
== EVAL_SKIP
)
2505 if (binop_user_defined_p (op
, arg1
, arg2
))
2507 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2511 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2512 tem
= value_less (arg2
, arg1
);
2513 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2514 return value_from_longest (type
, (LONGEST
) tem
);
2518 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2519 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2520 if (noside
== EVAL_SKIP
)
2522 if (binop_user_defined_p (op
, arg1
, arg2
))
2524 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2528 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2529 tem
= value_less (arg2
, arg1
) || value_equal (arg1
, arg2
);
2530 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2531 return value_from_longest (type
, (LONGEST
) tem
);
2535 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2536 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2537 if (noside
== EVAL_SKIP
)
2539 if (binop_user_defined_p (op
, arg1
, arg2
))
2541 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2545 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2546 tem
= value_less (arg1
, arg2
) || value_equal (arg1
, arg2
);
2547 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2548 return value_from_longest (type
, (LONGEST
) tem
);
2552 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2553 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2554 if (noside
== EVAL_SKIP
)
2556 type
= check_typedef (value_type (arg2
));
2557 if (TYPE_CODE (type
) != TYPE_CODE_INT
)
2558 error (_("Non-integral right operand for \"@\" operator."));
2559 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2561 return allocate_repeat_value (value_type (arg1
),
2562 longest_to_int (value_as_long (arg2
)));
2565 return value_repeat (arg1
, longest_to_int (value_as_long (arg2
)));
2568 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2569 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2572 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2573 if (noside
== EVAL_SKIP
)
2575 if (unop_user_defined_p (op
, arg1
))
2576 return value_x_unop (arg1
, op
, noside
);
2579 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2580 return value_pos (arg1
);
2584 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2585 if (noside
== EVAL_SKIP
)
2587 if (unop_user_defined_p (op
, arg1
))
2588 return value_x_unop (arg1
, op
, noside
);
2591 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2592 return value_neg (arg1
);
2595 case UNOP_COMPLEMENT
:
2596 /* C++: check for and handle destructor names. */
2597 op
= exp
->elts
[*pos
].opcode
;
2599 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2600 if (noside
== EVAL_SKIP
)
2602 if (unop_user_defined_p (UNOP_COMPLEMENT
, arg1
))
2603 return value_x_unop (arg1
, UNOP_COMPLEMENT
, noside
);
2606 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2607 return value_complement (arg1
);
2610 case UNOP_LOGICAL_NOT
:
2611 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2612 if (noside
== EVAL_SKIP
)
2614 if (unop_user_defined_p (op
, arg1
))
2615 return value_x_unop (arg1
, op
, noside
);
2618 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2619 return value_from_longest (type
, (LONGEST
) value_logical_not (arg1
));
2623 if (expect_type
&& TYPE_CODE (expect_type
) == TYPE_CODE_PTR
)
2624 expect_type
= TYPE_TARGET_TYPE (check_typedef (expect_type
));
2625 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2626 type
= check_typedef (value_type (arg1
));
2627 if (TYPE_CODE (type
) == TYPE_CODE_METHODPTR
2628 || TYPE_CODE (type
) == TYPE_CODE_MEMBERPTR
)
2629 error (_("Attempt to dereference pointer "
2630 "to member without an object"));
2631 if (noside
== EVAL_SKIP
)
2633 if (unop_user_defined_p (op
, arg1
))
2634 return value_x_unop (arg1
, op
, noside
);
2635 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2637 type
= check_typedef (value_type (arg1
));
2638 if (TYPE_CODE (type
) == TYPE_CODE_PTR
2639 || TYPE_CODE (type
) == TYPE_CODE_REF
2640 /* In C you can dereference an array to get the 1st elt. */
2641 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
2643 return value_zero (TYPE_TARGET_TYPE (type
),
2645 else if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2646 /* GDB allows dereferencing an int. */
2647 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
2650 error (_("Attempt to take contents of a non-pointer value."));
2653 /* Allow * on an integer so we can cast it to whatever we want.
2654 This returns an int, which seems like the most C-like thing to
2655 do. "long long" variables are rare enough that
2656 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2657 if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2658 return value_at_lazy (builtin_type (exp
->gdbarch
)->builtin_int
,
2659 (CORE_ADDR
) value_as_address (arg1
));
2660 return value_ind (arg1
);
2663 /* C++: check for and handle pointer to members. */
2665 op
= exp
->elts
[*pos
].opcode
;
2667 if (noside
== EVAL_SKIP
)
2669 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2674 struct value
*retvalp
= evaluate_subexp_for_address (exp
, pos
,
2681 if (noside
== EVAL_SKIP
)
2683 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2686 return evaluate_subexp_for_sizeof (exp
, pos
);
2690 type
= exp
->elts
[pc
+ 1].type
;
2691 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2692 if (noside
== EVAL_SKIP
)
2694 if (type
!= value_type (arg1
))
2695 arg1
= value_cast (type
, arg1
);
2698 case UNOP_DYNAMIC_CAST
:
2700 type
= exp
->elts
[pc
+ 1].type
;
2701 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2702 if (noside
== EVAL_SKIP
)
2704 return value_dynamic_cast (type
, arg1
);
2706 case UNOP_REINTERPRET_CAST
:
2708 type
= exp
->elts
[pc
+ 1].type
;
2709 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2710 if (noside
== EVAL_SKIP
)
2712 return value_reinterpret_cast (type
, arg1
);
2716 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2717 if (noside
== EVAL_SKIP
)
2719 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2720 return value_zero (exp
->elts
[pc
+ 1].type
, lval_memory
);
2722 return value_at_lazy (exp
->elts
[pc
+ 1].type
,
2723 value_as_address (arg1
));
2725 case UNOP_MEMVAL_TLS
:
2727 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2728 if (noside
== EVAL_SKIP
)
2730 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2731 return value_zero (exp
->elts
[pc
+ 2].type
, lval_memory
);
2736 tls_addr
= target_translate_tls_address (exp
->elts
[pc
+ 1].objfile
,
2737 value_as_address (arg1
));
2738 return value_at_lazy (exp
->elts
[pc
+ 2].type
, tls_addr
);
2741 case UNOP_PREINCREMENT
:
2742 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2743 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2745 else if (unop_user_defined_p (op
, arg1
))
2747 return value_x_unop (arg1
, op
, noside
);
2751 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2752 arg2
= value_ptradd (arg1
, 1);
2755 struct value
*tmp
= arg1
;
2757 arg2
= value_one (value_type (arg1
));
2758 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2759 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2762 return value_assign (arg1
, arg2
);
2765 case UNOP_PREDECREMENT
:
2766 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2767 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2769 else if (unop_user_defined_p (op
, arg1
))
2771 return value_x_unop (arg1
, op
, noside
);
2775 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2776 arg2
= value_ptradd (arg1
, -1);
2779 struct value
*tmp
= arg1
;
2781 arg2
= value_one (value_type (arg1
));
2782 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2783 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2786 return value_assign (arg1
, arg2
);
2789 case UNOP_POSTINCREMENT
:
2790 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2791 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2793 else if (unop_user_defined_p (op
, arg1
))
2795 return value_x_unop (arg1
, op
, noside
);
2799 arg3
= value_non_lval (arg1
);
2801 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2802 arg2
= value_ptradd (arg1
, 1);
2805 struct value
*tmp
= arg1
;
2807 arg2
= value_one (value_type (arg1
));
2808 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2809 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2812 value_assign (arg1
, arg2
);
2816 case UNOP_POSTDECREMENT
:
2817 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2818 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2820 else if (unop_user_defined_p (op
, arg1
))
2822 return value_x_unop (arg1
, op
, noside
);
2826 arg3
= value_non_lval (arg1
);
2828 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2829 arg2
= value_ptradd (arg1
, -1);
2832 struct value
*tmp
= arg1
;
2834 arg2
= value_one (value_type (arg1
));
2835 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2836 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2839 value_assign (arg1
, arg2
);
2845 return value_of_this (exp
->language_defn
);
2848 /* The value is not supposed to be used. This is here to make it
2849 easier to accommodate expressions that contain types. */
2851 if (noside
== EVAL_SKIP
)
2853 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2855 struct type
*type
= exp
->elts
[pc
+ 1].type
;
2857 /* If this is a typedef, then find its immediate target. We
2858 use check_typedef to resolve stubs, but we ignore its
2859 result because we do not want to dig past all
2861 check_typedef (type
);
2862 if (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2863 type
= TYPE_TARGET_TYPE (type
);
2864 return allocate_value (type
);
2867 error (_("Attempt to use a type name as an expression"));
2870 /* Removing this case and compiling with gcc -Wall reveals that
2871 a lot of cases are hitting this case. Some of these should
2872 probably be removed from expression.h; others are legitimate
2873 expressions which are (apparently) not fully implemented.
2875 If there are any cases landing here which mean a user error,
2876 then they should be separate cases, with more descriptive
2879 error (_("GDB does not (yet) know how to "
2880 "evaluate that kind of expression"));
2884 return value_from_longest (builtin_type (exp
->gdbarch
)->builtin_int
, 1);
2887 /* Evaluate a subexpression of EXP, at index *POS,
2888 and return the address of that subexpression.
2889 Advance *POS over the subexpression.
2890 If the subexpression isn't an lvalue, get an error.
2891 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2892 then only the type of the result need be correct. */
2894 static struct value
*
2895 evaluate_subexp_for_address (struct expression
*exp
, int *pos
,
2905 op
= exp
->elts
[pc
].opcode
;
2911 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2913 /* We can't optimize out "&*" if there's a user-defined operator*. */
2914 if (unop_user_defined_p (op
, x
))
2916 x
= value_x_unop (x
, op
, noside
);
2917 goto default_case_after_eval
;
2920 return coerce_array (x
);
2924 return value_cast (lookup_pointer_type (exp
->elts
[pc
+ 1].type
),
2925 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
2928 var
= exp
->elts
[pc
+ 2].symbol
;
2930 /* C++: The "address" of a reference should yield the address
2931 * of the object pointed to. Let value_addr() deal with it. */
2932 if (TYPE_CODE (SYMBOL_TYPE (var
)) == TYPE_CODE_REF
)
2936 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2939 lookup_pointer_type (SYMBOL_TYPE (var
));
2940 enum address_class sym_class
= SYMBOL_CLASS (var
);
2942 if (sym_class
== LOC_CONST
2943 || sym_class
== LOC_CONST_BYTES
2944 || sym_class
== LOC_REGISTER
)
2945 error (_("Attempt to take address of register or constant."));
2948 value_zero (type
, not_lval
);
2951 return address_of_variable (var
, exp
->elts
[pc
+ 1].block
);
2954 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
2955 (*pos
) += 5 + BYTES_TO_EXP_ELEM (tem
+ 1);
2956 x
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
2957 &exp
->elts
[pc
+ 3].string
,
2960 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
2965 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2966 default_case_after_eval
:
2967 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2969 struct type
*type
= check_typedef (value_type (x
));
2971 if (VALUE_LVAL (x
) == lval_memory
|| value_must_coerce_to_target (x
))
2972 return value_zero (lookup_pointer_type (value_type (x
)),
2974 else if (TYPE_CODE (type
) == TYPE_CODE_REF
)
2975 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2978 error (_("Attempt to take address of "
2979 "value not located in memory."));
2981 return value_addr (x
);
2985 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2986 When used in contexts where arrays will be coerced anyway, this is
2987 equivalent to `evaluate_subexp' but much faster because it avoids
2988 actually fetching array contents (perhaps obsolete now that we have
2991 Note that we currently only do the coercion for C expressions, where
2992 arrays are zero based and the coercion is correct. For other languages,
2993 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2994 to decide if coercion is appropriate. */
2997 evaluate_subexp_with_coercion (struct expression
*exp
,
2998 int *pos
, enum noside noside
)
3007 op
= exp
->elts
[pc
].opcode
;
3012 var
= exp
->elts
[pc
+ 2].symbol
;
3013 type
= check_typedef (SYMBOL_TYPE (var
));
3014 if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
3015 && !TYPE_VECTOR (type
)
3016 && CAST_IS_CONVERSION (exp
->language_defn
))
3019 val
= address_of_variable (var
, exp
->elts
[pc
+ 1].block
);
3020 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
3026 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
3030 /* Evaluate a subexpression of EXP, at index *POS,
3031 and return a value for the size of that subexpression.
3032 Advance *POS over the subexpression. */
3034 static struct value
*
3035 evaluate_subexp_for_sizeof (struct expression
*exp
, int *pos
)
3037 /* FIXME: This should be size_t. */
3038 struct type
*size_type
= builtin_type (exp
->gdbarch
)->builtin_int
;
3045 op
= exp
->elts
[pc
].opcode
;
3049 /* This case is handled specially
3050 so that we avoid creating a value for the result type.
3051 If the result type is very big, it's desirable not to
3052 create a value unnecessarily. */
3055 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
3056 type
= check_typedef (value_type (val
));
3057 if (TYPE_CODE (type
) != TYPE_CODE_PTR
3058 && TYPE_CODE (type
) != TYPE_CODE_REF
3059 && TYPE_CODE (type
) != TYPE_CODE_ARRAY
)
3060 error (_("Attempt to take contents of a non-pointer value."));
3061 type
= check_typedef (TYPE_TARGET_TYPE (type
));
3062 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
3066 type
= check_typedef (exp
->elts
[pc
+ 1].type
);
3067 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
3071 type
= check_typedef (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
));
3073 value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
3076 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
3077 return value_from_longest (size_type
,
3078 (LONGEST
) TYPE_LENGTH (value_type (val
)));
3082 /* Parse a type expression in the string [P..P+LENGTH). */
3085 parse_and_eval_type (char *p
, int length
)
3087 char *tmp
= (char *) alloca (length
+ 4);
3088 struct expression
*expr
;
3091 memcpy (tmp
+ 1, p
, length
);
3092 tmp
[length
+ 1] = ')';
3093 tmp
[length
+ 2] = '0';
3094 tmp
[length
+ 3] = '\0';
3095 expr
= parse_expression (tmp
);
3096 if (expr
->elts
[0].opcode
!= UNOP_CAST
)
3097 error (_("Internal error in eval_type."));
3098 return expr
->elts
[1].type
;
3102 calc_f77_array_dims (struct type
*array_type
)
3105 struct type
*tmp_type
;
3107 if ((TYPE_CODE (array_type
) != TYPE_CODE_ARRAY
))
3108 error (_("Can't get dimensions for a non-array type"));
3110 tmp_type
= array_type
;
3112 while ((tmp_type
= TYPE_TARGET_TYPE (tmp_type
)))
3114 if (TYPE_CODE (tmp_type
) == TYPE_CODE_ARRAY
)