1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
27 #include "expression.h"
30 #include "language.h" /* For CAST_IS_CONVERSION */
31 #include "f-lang.h" /* for array bound stuff */
34 #include "objc-lang.h"
36 #include "parser-defs.h"
37 #include "cp-support.h"
39 #include "exceptions.h"
41 #include "user-regs.h"
43 #include "gdb_assert.h"
45 /* This is defined in valops.c */
46 extern int overload_resolution
;
48 /* JYG: lookup rtti type of STRUCTOP_PTR when this is set to continue
49 on with successful lookup for member/method of the rtti type. */
50 extern int objectprint
;
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 struct value
*evaluate_subexp (struct type
*, struct expression
*,
62 static char *get_label (struct expression
*, int *);
64 static struct value
*evaluate_struct_tuple (struct value
*,
65 struct expression
*, int *,
68 static LONGEST
init_array_element (struct value
*, struct value
*,
69 struct expression
*, int *, enum noside
,
73 evaluate_subexp (struct type
*expect_type
, struct expression
*exp
,
74 int *pos
, enum noside noside
)
76 return (*exp
->language_defn
->la_exp_desc
->evaluate_exp
)
77 (expect_type
, exp
, pos
, noside
);
80 /* Parse the string EXP as a C expression, evaluate it,
81 and return the result as a number. */
84 parse_and_eval_address (char *exp
)
86 struct expression
*expr
= parse_expression (exp
);
88 struct cleanup
*old_chain
=
89 make_cleanup (free_current_contents
, &expr
);
91 addr
= value_as_address (evaluate_expression (expr
));
92 do_cleanups (old_chain
);
96 /* Like parse_and_eval_address but takes a pointer to a char * variable
97 and advanced that variable across the characters parsed. */
100 parse_and_eval_address_1 (char **expptr
)
102 struct expression
*expr
= parse_exp_1 (expptr
, (struct block
*) 0, 0);
104 struct cleanup
*old_chain
=
105 make_cleanup (free_current_contents
, &expr
);
107 addr
= value_as_address (evaluate_expression (expr
));
108 do_cleanups (old_chain
);
112 /* Like parse_and_eval_address, but treats the value of the expression
113 as an integer, not an address, returns a LONGEST, not a CORE_ADDR */
115 parse_and_eval_long (char *exp
)
117 struct expression
*expr
= parse_expression (exp
);
119 struct cleanup
*old_chain
=
120 make_cleanup (free_current_contents
, &expr
);
122 retval
= value_as_long (evaluate_expression (expr
));
123 do_cleanups (old_chain
);
128 parse_and_eval (char *exp
)
130 struct expression
*expr
= parse_expression (exp
);
132 struct cleanup
*old_chain
=
133 make_cleanup (free_current_contents
, &expr
);
135 val
= evaluate_expression (expr
);
136 do_cleanups (old_chain
);
140 /* Parse up to a comma (or to a closeparen)
141 in the string EXPP as an expression, evaluate it, and return the value.
142 EXPP is advanced to point to the comma. */
145 parse_to_comma_and_eval (char **expp
)
147 struct expression
*expr
= parse_exp_1 (expp
, (struct block
*) 0, 1);
149 struct cleanup
*old_chain
=
150 make_cleanup (free_current_contents
, &expr
);
152 val
= evaluate_expression (expr
);
153 do_cleanups (old_chain
);
157 /* Evaluate an expression in internal prefix form
158 such as is constructed by parse.y.
160 See expression.h for info on the format of an expression. */
163 evaluate_expression (struct expression
*exp
)
166 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_NORMAL
);
169 /* Evaluate an expression, avoiding all memory references
170 and getting a value whose type alone is correct. */
173 evaluate_type (struct expression
*exp
)
176 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_AVOID_SIDE_EFFECTS
);
179 /* Evaluate a subexpression, avoiding all memory references and
180 getting a value whose type alone is correct. */
183 evaluate_subexpression_type (struct expression
*exp
, int subexp
)
185 return evaluate_subexp (NULL_TYPE
, exp
, &subexp
, EVAL_AVOID_SIDE_EFFECTS
);
188 /* Extract a field operation from an expression. If the subexpression
189 of EXP starting at *SUBEXP is not a structure dereference
190 operation, return NULL. Otherwise, return the name of the
191 dereferenced field, and advance *SUBEXP to point to the
192 subexpression of the left-hand-side of the dereference. This is
193 used when completing field names. */
196 extract_field_op (struct expression
*exp
, int *subexp
)
200 if (exp
->elts
[*subexp
].opcode
!= STRUCTOP_STRUCT
201 && exp
->elts
[*subexp
].opcode
!= STRUCTOP_PTR
)
203 tem
= longest_to_int (exp
->elts
[*subexp
+ 1].longconst
);
204 result
= &exp
->elts
[*subexp
+ 2].string
;
205 (*subexp
) += 1 + 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
209 /* If the next expression is an OP_LABELED, skips past it,
210 returning the label. Otherwise, does nothing and returns NULL. */
213 get_label (struct expression
*exp
, int *pos
)
215 if (exp
->elts
[*pos
].opcode
== OP_LABELED
)
218 char *name
= &exp
->elts
[pc
+ 2].string
;
219 int tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
220 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
227 /* This function evaluates tuples (in (the deleted) Chill) or
228 brace-initializers (in C/C++) for structure types. */
230 static struct value
*
231 evaluate_struct_tuple (struct value
*struct_val
,
232 struct expression
*exp
,
233 int *pos
, enum noside noside
, int nargs
)
235 struct type
*struct_type
= check_typedef (value_type (struct_val
));
236 struct type
*substruct_type
= struct_type
;
237 struct type
*field_type
;
244 struct value
*val
= NULL
;
249 /* Skip past the labels, and count them. */
250 while (get_label (exp
, pos
) != NULL
)
255 char *label
= get_label (exp
, &pc
);
258 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
261 char *field_name
= TYPE_FIELD_NAME (struct_type
, fieldno
);
262 if (field_name
!= NULL
&& strcmp (field_name
, label
) == 0)
265 subfieldno
= fieldno
;
266 substruct_type
= struct_type
;
270 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
273 char *field_name
= TYPE_FIELD_NAME (struct_type
, fieldno
);
274 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
275 if ((field_name
== 0 || *field_name
== '\0')
276 && TYPE_CODE (field_type
) == TYPE_CODE_UNION
)
279 for (; variantno
< TYPE_NFIELDS (field_type
);
283 = TYPE_FIELD_TYPE (field_type
, variantno
);
284 if (TYPE_CODE (substruct_type
) == TYPE_CODE_STRUCT
)
287 subfieldno
< TYPE_NFIELDS (substruct_type
);
290 if (strcmp(TYPE_FIELD_NAME (substruct_type
,
301 error (_("there is no field named %s"), label
);
307 /* Unlabelled tuple element - go to next field. */
311 if (subfieldno
>= TYPE_NFIELDS (substruct_type
))
314 substruct_type
= struct_type
;
320 /* Skip static fields. */
321 while (fieldno
< TYPE_NFIELDS (struct_type
)
322 && TYPE_FIELD_STATIC_KIND (struct_type
, fieldno
))
324 subfieldno
= fieldno
;
325 if (fieldno
>= TYPE_NFIELDS (struct_type
))
326 error (_("too many initializers"));
327 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
328 if (TYPE_CODE (field_type
) == TYPE_CODE_UNION
329 && TYPE_FIELD_NAME (struct_type
, fieldno
)[0] == '0')
330 error (_("don't know which variant you want to set"));
334 /* Here, struct_type is the type of the inner struct,
335 while substruct_type is the type of the inner struct.
336 These are the same for normal structures, but a variant struct
337 contains anonymous union fields that contain substruct fields.
338 The value fieldno is the index of the top-level (normal or
339 anonymous union) field in struct_field, while the value
340 subfieldno is the index of the actual real (named inner) field
341 in substruct_type. */
343 field_type
= TYPE_FIELD_TYPE (substruct_type
, subfieldno
);
345 val
= evaluate_subexp (field_type
, exp
, pos
, noside
);
347 /* Now actually set the field in struct_val. */
349 /* Assign val to field fieldno. */
350 if (value_type (val
) != field_type
)
351 val
= value_cast (field_type
, val
);
353 bitsize
= TYPE_FIELD_BITSIZE (substruct_type
, subfieldno
);
354 bitpos
= TYPE_FIELD_BITPOS (struct_type
, fieldno
);
356 bitpos
+= TYPE_FIELD_BITPOS (substruct_type
, subfieldno
);
357 addr
= value_contents_writeable (struct_val
) + bitpos
/ 8;
359 modify_field (addr
, value_as_long (val
),
360 bitpos
% 8, bitsize
);
362 memcpy (addr
, value_contents (val
),
363 TYPE_LENGTH (value_type (val
)));
365 while (--nlabels
> 0);
370 /* Recursive helper function for setting elements of array tuples for
371 (the deleted) Chill. The target is ARRAY (which has bounds
372 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
373 and NOSIDE are as usual. Evaluates index expresions and sets the
374 specified element(s) of ARRAY to ELEMENT. Returns last index
378 init_array_element (struct value
*array
, struct value
*element
,
379 struct expression
*exp
, int *pos
,
380 enum noside noside
, LONGEST low_bound
, LONGEST high_bound
)
383 int element_size
= TYPE_LENGTH (value_type (element
));
384 if (exp
->elts
[*pos
].opcode
== BINOP_COMMA
)
387 init_array_element (array
, element
, exp
, pos
, noside
,
388 low_bound
, high_bound
);
389 return init_array_element (array
, element
,
390 exp
, pos
, noside
, low_bound
, high_bound
);
392 else if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
396 low
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
397 high
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
398 if (low
< low_bound
|| high
> high_bound
)
399 error (_("tuple range index out of range"));
400 for (index
= low
; index
<= high
; index
++)
402 memcpy (value_contents_raw (array
)
403 + (index
- low_bound
) * element_size
,
404 value_contents (element
), element_size
);
409 index
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
410 if (index
< low_bound
|| index
> high_bound
)
411 error (_("tuple index out of range"));
412 memcpy (value_contents_raw (array
) + (index
- low_bound
) * element_size
,
413 value_contents (element
), element_size
);
419 value_f90_subarray (struct value
*array
,
420 struct expression
*exp
, int *pos
, enum noside noside
)
423 LONGEST low_bound
, high_bound
;
424 struct type
*range
= check_typedef (TYPE_INDEX_TYPE (value_type (array
)));
425 enum f90_range_type range_type
= longest_to_int (exp
->elts
[pc
].longconst
);
429 if (range_type
== LOW_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
430 low_bound
= TYPE_LOW_BOUND (range
);
432 low_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
434 if (range_type
== HIGH_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
435 high_bound
= TYPE_HIGH_BOUND (range
);
437 high_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
439 return value_slice (array
, low_bound
, high_bound
- low_bound
+ 1);
443 /* Promote value ARG1 as appropriate before performing a unary operation
445 If the result is not appropriate for any particular language then it
446 needs to patch this function. */
449 unop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
454 *arg1
= coerce_ref (*arg1
);
455 type1
= check_typedef (value_type (*arg1
));
457 if (is_integral_type (type1
))
459 switch (language
->la_language
)
462 /* Perform integral promotion for ANSI C/C++.
463 If not appropropriate for any particular language
464 it needs to modify this function. */
466 struct type
*builtin_int
= builtin_type (gdbarch
)->builtin_int
;
467 if (TYPE_LENGTH (type1
) < TYPE_LENGTH (builtin_int
))
468 *arg1
= value_cast (builtin_int
, *arg1
);
475 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
476 operation on those two operands.
477 If the result is not appropriate for any particular language then it
478 needs to patch this function. */
481 binop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
482 struct value
**arg1
, struct value
**arg2
)
484 struct type
*promoted_type
= NULL
;
488 *arg1
= coerce_ref (*arg1
);
489 *arg2
= coerce_ref (*arg2
);
491 type1
= check_typedef (value_type (*arg1
));
492 type2
= check_typedef (value_type (*arg2
));
494 if ((TYPE_CODE (type1
) != TYPE_CODE_FLT
495 && TYPE_CODE (type1
) != TYPE_CODE_DECFLOAT
496 && !is_integral_type (type1
))
497 || (TYPE_CODE (type2
) != TYPE_CODE_FLT
498 && TYPE_CODE (type2
) != TYPE_CODE_DECFLOAT
499 && !is_integral_type (type2
)))
502 if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
503 || TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
)
505 /* No promotion required. */
507 else if (TYPE_CODE (type1
) == TYPE_CODE_FLT
508 || TYPE_CODE (type2
) == TYPE_CODE_FLT
)
510 switch (language
->la_language
)
516 /* No promotion required. */
520 /* For other languages the result type is unchanged from gdb
521 version 6.7 for backward compatibility.
522 If either arg was long double, make sure that value is also long
523 double. Otherwise use double. */
524 if (TYPE_LENGTH (type1
) * 8 > gdbarch_double_bit (gdbarch
)
525 || TYPE_LENGTH (type2
) * 8 > gdbarch_double_bit (gdbarch
))
526 promoted_type
= builtin_type (gdbarch
)->builtin_long_double
;
528 promoted_type
= builtin_type (gdbarch
)->builtin_double
;
532 else if (TYPE_CODE (type1
) == TYPE_CODE_BOOL
533 && TYPE_CODE (type2
) == TYPE_CODE_BOOL
)
535 /* No promotion required. */
538 /* Integral operations here. */
539 /* FIXME: Also mixed integral/booleans, with result an integer. */
541 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
542 unsigned int promoted_len1
= TYPE_LENGTH (type1
);
543 unsigned int promoted_len2
= TYPE_LENGTH (type2
);
544 int is_unsigned1
= TYPE_UNSIGNED (type1
);
545 int is_unsigned2
= TYPE_UNSIGNED (type2
);
546 unsigned int result_len
;
547 int unsigned_operation
;
549 /* Determine type length and signedness after promotion for
551 if (promoted_len1
< TYPE_LENGTH (builtin
->builtin_int
))
554 promoted_len1
= TYPE_LENGTH (builtin
->builtin_int
);
556 if (promoted_len2
< TYPE_LENGTH (builtin
->builtin_int
))
559 promoted_len2
= TYPE_LENGTH (builtin
->builtin_int
);
562 if (promoted_len1
> promoted_len2
)
564 unsigned_operation
= is_unsigned1
;
565 result_len
= promoted_len1
;
567 else if (promoted_len2
> promoted_len1
)
569 unsigned_operation
= is_unsigned2
;
570 result_len
= promoted_len2
;
574 unsigned_operation
= is_unsigned1
|| is_unsigned2
;
575 result_len
= promoted_len1
;
578 switch (language
->la_language
)
584 if (result_len
<= TYPE_LENGTH (builtin
->builtin_int
))
586 promoted_type
= (unsigned_operation
587 ? builtin
->builtin_unsigned_int
588 : builtin
->builtin_int
);
590 else if (result_len
<= TYPE_LENGTH (builtin
->builtin_long
))
592 promoted_type
= (unsigned_operation
593 ? builtin
->builtin_unsigned_long
594 : builtin
->builtin_long
);
598 promoted_type
= (unsigned_operation
599 ? builtin
->builtin_unsigned_long_long
600 : builtin
->builtin_long_long
);
605 /* For other languages the result type is unchanged from gdb
606 version 6.7 for backward compatibility.
607 If either arg was long long, make sure that value is also long
608 long. Otherwise use long. */
609 if (unsigned_operation
)
611 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
612 promoted_type
= builtin
->builtin_unsigned_long_long
;
614 promoted_type
= builtin
->builtin_unsigned_long
;
618 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
619 promoted_type
= builtin
->builtin_long_long
;
621 promoted_type
= builtin
->builtin_long
;
629 /* Promote both operands to common type. */
630 *arg1
= value_cast (promoted_type
, *arg1
);
631 *arg2
= value_cast (promoted_type
, *arg2
);
636 ptrmath_type_p (struct type
*type
)
638 type
= check_typedef (type
);
639 if (TYPE_CODE (type
) == TYPE_CODE_REF
)
640 type
= TYPE_TARGET_TYPE (type
);
642 switch (TYPE_CODE (type
))
648 case TYPE_CODE_ARRAY
:
649 return current_language
->c_style_arrays
;
657 evaluate_subexp_standard (struct type
*expect_type
,
658 struct expression
*exp
, int *pos
,
663 int pc
, pc2
= 0, oldpos
;
664 struct value
*arg1
= NULL
;
665 struct value
*arg2
= NULL
;
669 struct value
**argvec
;
670 int upper
, lower
, retcode
;
674 struct type
**arg_types
;
678 op
= exp
->elts
[pc
].opcode
;
683 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
684 (*pos
) += 4 + BYTES_TO_EXP_ELEM (tem
+ 1);
685 if (noside
== EVAL_SKIP
)
687 arg1
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
688 &exp
->elts
[pc
+ 3].string
,
691 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
696 return value_from_longest (exp
->elts
[pc
+ 1].type
,
697 exp
->elts
[pc
+ 2].longconst
);
701 return value_from_double (exp
->elts
[pc
+ 1].type
,
702 exp
->elts
[pc
+ 2].doubleconst
);
706 return value_from_decfloat (exp
->elts
[pc
+ 1].type
,
707 exp
->elts
[pc
+ 2].decfloatconst
);
711 if (noside
== EVAL_SKIP
)
714 /* JYG: We used to just return value_zero of the symbol type
715 if we're asked to avoid side effects. Otherwise we return
716 value_of_variable (...). However I'm not sure if
717 value_of_variable () has any side effect.
718 We need a full value object returned here for whatis_exp ()
719 to call evaluate_type () and then pass the full value to
720 value_rtti_target_type () if we are dealing with a pointer
721 or reference to a base class and print object is on. */
724 volatile struct gdb_exception except
;
725 struct value
*ret
= NULL
;
727 TRY_CATCH (except
, RETURN_MASK_ERROR
)
729 ret
= value_of_variable (exp
->elts
[pc
+ 2].symbol
,
730 exp
->elts
[pc
+ 1].block
);
733 if (except
.reason
< 0)
735 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
736 ret
= value_zero (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
), not_lval
);
738 throw_exception (except
);
747 access_value_history (longest_to_int (exp
->elts
[pc
+ 1].longconst
));
751 const char *name
= &exp
->elts
[pc
+ 2].string
;
755 (*pos
) += 3 + BYTES_TO_EXP_ELEM (exp
->elts
[pc
+ 1].longconst
+ 1);
756 regno
= user_reg_map_name_to_regnum (current_gdbarch
,
757 name
, strlen (name
));
759 error (_("Register $%s not available."), name
);
761 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
762 a value with the appropriate register type. Unfortunately,
763 we don't have easy access to the type of user registers.
764 So for these registers, we fetch the register value regardless
765 of the evaluation mode. */
766 if (noside
== EVAL_AVOID_SIDE_EFFECTS
767 && regno
< gdbarch_num_regs (current_gdbarch
)
768 + gdbarch_num_pseudo_regs (current_gdbarch
))
769 val
= value_zero (register_type (current_gdbarch
, regno
), not_lval
);
771 val
= value_of_register (regno
, get_selected_frame (NULL
));
773 error (_("Value of register %s not available."), name
);
779 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
780 return value_from_longest (type
, exp
->elts
[pc
+ 1].longconst
);
784 return value_of_internalvar (exp
->elts
[pc
+ 1].internalvar
);
787 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
788 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
789 if (noside
== EVAL_SKIP
)
791 return value_string (&exp
->elts
[pc
+ 2].string
, tem
);
793 case OP_OBJC_NSSTRING
: /* Objective C Foundation Class NSString constant. */
794 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
795 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
796 if (noside
== EVAL_SKIP
)
800 return (struct value
*) value_nsstring (&exp
->elts
[pc
+ 2].string
, tem
+ 1);
803 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
805 += 3 + BYTES_TO_EXP_ELEM ((tem
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
);
806 if (noside
== EVAL_SKIP
)
808 return value_bitstring (&exp
->elts
[pc
+ 2].string
, tem
);
813 tem2
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
814 tem3
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
815 nargs
= tem3
- tem2
+ 1;
816 type
= expect_type
? check_typedef (expect_type
) : NULL_TYPE
;
818 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
819 && TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
821 struct value
*rec
= allocate_value (expect_type
);
822 memset (value_contents_raw (rec
), '\0', TYPE_LENGTH (type
));
823 return evaluate_struct_tuple (rec
, exp
, pos
, noside
, nargs
);
826 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
827 && TYPE_CODE (type
) == TYPE_CODE_ARRAY
)
829 struct type
*range_type
= TYPE_FIELD_TYPE (type
, 0);
830 struct type
*element_type
= TYPE_TARGET_TYPE (type
);
831 struct value
*array
= allocate_value (expect_type
);
832 int element_size
= TYPE_LENGTH (check_typedef (element_type
));
833 LONGEST low_bound
, high_bound
, index
;
834 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
837 high_bound
= (TYPE_LENGTH (type
) / element_size
) - 1;
840 memset (value_contents_raw (array
), 0, TYPE_LENGTH (expect_type
));
841 for (tem
= nargs
; --nargs
>= 0;)
843 struct value
*element
;
845 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
848 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
850 element
= evaluate_subexp (element_type
, exp
, pos
, noside
);
851 if (value_type (element
) != element_type
)
852 element
= value_cast (element_type
, element
);
855 int continue_pc
= *pos
;
857 index
= init_array_element (array
, element
, exp
, pos
, noside
,
858 low_bound
, high_bound
);
863 if (index
> high_bound
)
864 /* to avoid memory corruption */
865 error (_("Too many array elements"));
866 memcpy (value_contents_raw (array
)
867 + (index
- low_bound
) * element_size
,
868 value_contents (element
),
876 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
877 && TYPE_CODE (type
) == TYPE_CODE_SET
)
879 struct value
*set
= allocate_value (expect_type
);
880 gdb_byte
*valaddr
= value_contents_raw (set
);
881 struct type
*element_type
= TYPE_INDEX_TYPE (type
);
882 struct type
*check_type
= element_type
;
883 LONGEST low_bound
, high_bound
;
885 /* get targettype of elementtype */
886 while (TYPE_CODE (check_type
) == TYPE_CODE_RANGE
||
887 TYPE_CODE (check_type
) == TYPE_CODE_TYPEDEF
)
888 check_type
= TYPE_TARGET_TYPE (check_type
);
890 if (get_discrete_bounds (element_type
, &low_bound
, &high_bound
) < 0)
891 error (_("(power)set type with unknown size"));
892 memset (valaddr
, '\0', TYPE_LENGTH (type
));
893 for (tem
= 0; tem
< nargs
; tem
++)
895 LONGEST range_low
, range_high
;
896 struct type
*range_low_type
, *range_high_type
;
897 struct value
*elem_val
;
898 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
901 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
902 range_low_type
= value_type (elem_val
);
903 range_low
= value_as_long (elem_val
);
904 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
905 range_high_type
= value_type (elem_val
);
906 range_high
= value_as_long (elem_val
);
910 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
911 range_low_type
= range_high_type
= value_type (elem_val
);
912 range_low
= range_high
= value_as_long (elem_val
);
914 /* check types of elements to avoid mixture of elements from
915 different types. Also check if type of element is "compatible"
916 with element type of powerset */
917 if (TYPE_CODE (range_low_type
) == TYPE_CODE_RANGE
)
918 range_low_type
= TYPE_TARGET_TYPE (range_low_type
);
919 if (TYPE_CODE (range_high_type
) == TYPE_CODE_RANGE
)
920 range_high_type
= TYPE_TARGET_TYPE (range_high_type
);
921 if ((TYPE_CODE (range_low_type
) != TYPE_CODE (range_high_type
)) ||
922 (TYPE_CODE (range_low_type
) == TYPE_CODE_ENUM
&&
923 (range_low_type
!= range_high_type
)))
924 /* different element modes */
925 error (_("POWERSET tuple elements of different mode"));
926 if ((TYPE_CODE (check_type
) != TYPE_CODE (range_low_type
)) ||
927 (TYPE_CODE (check_type
) == TYPE_CODE_ENUM
&&
928 range_low_type
!= check_type
))
929 error (_("incompatible POWERSET tuple elements"));
930 if (range_low
> range_high
)
932 warning (_("empty POWERSET tuple range"));
935 if (range_low
< low_bound
|| range_high
> high_bound
)
936 error (_("POWERSET tuple element out of range"));
937 range_low
-= low_bound
;
938 range_high
-= low_bound
;
939 for (; range_low
<= range_high
; range_low
++)
941 int bit_index
= (unsigned) range_low
% TARGET_CHAR_BIT
;
942 if (gdbarch_bits_big_endian (current_gdbarch
))
943 bit_index
= TARGET_CHAR_BIT
- 1 - bit_index
;
944 valaddr
[(unsigned) range_low
/ TARGET_CHAR_BIT
]
951 argvec
= (struct value
**) alloca (sizeof (struct value
*) * nargs
);
952 for (tem
= 0; tem
< nargs
; tem
++)
954 /* Ensure that array expressions are coerced into pointer objects. */
955 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
957 if (noside
== EVAL_SKIP
)
959 return value_array (tem2
, tem3
, argvec
);
963 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
965 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
967 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
968 if (noside
== EVAL_SKIP
)
970 return value_slice (array
, lowbound
, upper
- lowbound
+ 1);
973 case TERNOP_SLICE_COUNT
:
975 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
977 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
979 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
980 return value_slice (array
, lowbound
, length
);
984 /* Skip third and second args to evaluate the first one. */
985 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
986 if (value_logical_not (arg1
))
988 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
989 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
993 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
994 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
998 case OP_OBJC_SELECTOR
:
999 { /* Objective C @selector operator. */
1000 char *sel
= &exp
->elts
[pc
+ 2].string
;
1001 int len
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1002 struct type
*selector_type
;
1004 (*pos
) += 3 + BYTES_TO_EXP_ELEM (len
+ 1);
1005 if (noside
== EVAL_SKIP
)
1009 sel
[len
] = 0; /* Make sure it's terminated. */
1011 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1012 return value_from_longest (selector_type
, lookup_child_selector (sel
));
1015 case OP_OBJC_MSGCALL
:
1016 { /* Objective C message (method) call. */
1018 static CORE_ADDR responds_selector
= 0;
1019 static CORE_ADDR method_selector
= 0;
1021 CORE_ADDR selector
= 0;
1023 int struct_return
= 0;
1024 int sub_no_side
= 0;
1026 static struct value
*msg_send
= NULL
;
1027 static struct value
*msg_send_stret
= NULL
;
1028 static int gnu_runtime
= 0;
1030 struct value
*target
= NULL
;
1031 struct value
*method
= NULL
;
1032 struct value
*called_method
= NULL
;
1034 struct type
*selector_type
= NULL
;
1035 struct type
*long_type
;
1037 struct value
*ret
= NULL
;
1040 selector
= exp
->elts
[pc
+ 1].longconst
;
1041 nargs
= exp
->elts
[pc
+ 2].longconst
;
1042 argvec
= (struct value
**) alloca (sizeof (struct value
*)
1047 long_type
= builtin_type (exp
->gdbarch
)->builtin_long
;
1048 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1050 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1051 sub_no_side
= EVAL_NORMAL
;
1053 sub_no_side
= noside
;
1055 target
= evaluate_subexp (selector_type
, exp
, pos
, sub_no_side
);
1057 if (value_as_long (target
) == 0)
1058 return value_from_longest (long_type
, 0);
1060 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1063 /* Find the method dispatch (Apple runtime) or method lookup
1064 (GNU runtime) function for Objective-C. These will be used
1065 to lookup the symbol information for the method. If we
1066 can't find any symbol information, then we'll use these to
1067 call the method, otherwise we can call the method
1068 directly. The msg_send_stret function is used in the special
1069 case of a method that returns a structure (Apple runtime
1073 struct type
*type
= selector_type
;
1074 type
= lookup_function_type (type
);
1075 type
= lookup_pointer_type (type
);
1076 type
= lookup_function_type (type
);
1077 type
= lookup_pointer_type (type
);
1079 msg_send
= find_function_in_inferior ("objc_msg_lookup", NULL
);
1081 = find_function_in_inferior ("objc_msg_lookup", NULL
);
1083 msg_send
= value_from_pointer (type
, value_as_address (msg_send
));
1084 msg_send_stret
= value_from_pointer (type
,
1085 value_as_address (msg_send_stret
));
1089 msg_send
= find_function_in_inferior ("objc_msgSend", NULL
);
1090 /* Special dispatcher for methods returning structs */
1092 = find_function_in_inferior ("objc_msgSend_stret", NULL
);
1095 /* Verify the target object responds to this method. The
1096 standard top-level 'Object' class uses a different name for
1097 the verification method than the non-standard, but more
1098 often used, 'NSObject' class. Make sure we check for both. */
1100 responds_selector
= lookup_child_selector ("respondsToSelector:");
1101 if (responds_selector
== 0)
1102 responds_selector
= lookup_child_selector ("respondsTo:");
1104 if (responds_selector
== 0)
1105 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1107 method_selector
= lookup_child_selector ("methodForSelector:");
1108 if (method_selector
== 0)
1109 method_selector
= lookup_child_selector ("methodFor:");
1111 if (method_selector
== 0)
1112 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1114 /* Call the verification method, to make sure that the target
1115 class implements the desired method. */
1117 argvec
[0] = msg_send
;
1119 argvec
[2] = value_from_longest (long_type
, responds_selector
);
1120 argvec
[3] = value_from_longest (long_type
, selector
);
1123 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1126 /* Function objc_msg_lookup returns a pointer. */
1128 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1130 if (value_as_long (ret
) == 0)
1131 error (_("Target does not respond to this message selector."));
1133 /* Call "methodForSelector:" method, to get the address of a
1134 function method that implements this selector for this
1135 class. If we can find a symbol at that address, then we
1136 know the return type, parameter types etc. (that's a good
1139 argvec
[0] = msg_send
;
1141 argvec
[2] = value_from_longest (long_type
, method_selector
);
1142 argvec
[3] = value_from_longest (long_type
, selector
);
1145 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1149 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1152 /* ret should now be the selector. */
1154 addr
= value_as_long (ret
);
1157 struct symbol
*sym
= NULL
;
1158 /* Is it a high_level symbol? */
1160 sym
= find_pc_function (addr
);
1162 method
= value_of_variable (sym
, 0);
1165 /* If we found a method with symbol information, check to see
1166 if it returns a struct. Otherwise assume it doesn't. */
1172 struct type
*val_type
;
1174 funaddr
= find_function_addr (method
, &val_type
);
1176 b
= block_for_pc (funaddr
);
1178 CHECK_TYPEDEF (val_type
);
1180 if ((val_type
== NULL
)
1181 || (TYPE_CODE(val_type
) == TYPE_CODE_ERROR
))
1183 if (expect_type
!= NULL
)
1184 val_type
= expect_type
;
1187 struct_return
= using_struct_return (value_type (method
), val_type
);
1189 else if (expect_type
!= NULL
)
1191 struct_return
= using_struct_return (NULL
,
1192 check_typedef (expect_type
));
1195 /* Found a function symbol. Now we will substitute its
1196 value in place of the message dispatcher (obj_msgSend),
1197 so that we call the method directly instead of thru
1198 the dispatcher. The main reason for doing this is that
1199 we can now evaluate the return value and parameter values
1200 according to their known data types, in case we need to
1201 do things like promotion, dereferencing, special handling
1202 of structs and doubles, etc.
1204 We want to use the type signature of 'method', but still
1205 jump to objc_msgSend() or objc_msgSend_stret() to better
1206 mimic the behavior of the runtime. */
1210 if (TYPE_CODE (value_type (method
)) != TYPE_CODE_FUNC
)
1211 error (_("method address has symbol information with non-function type; skipping"));
1213 VALUE_ADDRESS (method
) = value_as_address (msg_send_stret
);
1215 VALUE_ADDRESS (method
) = value_as_address (msg_send
);
1216 called_method
= method
;
1221 called_method
= msg_send_stret
;
1223 called_method
= msg_send
;
1226 if (noside
== EVAL_SKIP
)
1229 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1231 /* If the return type doesn't look like a function type,
1232 call an error. This can happen if somebody tries to
1233 turn a variable into a function call. This is here
1234 because people often want to call, eg, strcmp, which
1235 gdb doesn't know is a function. If gdb isn't asked for
1236 it's opinion (ie. through "whatis"), it won't offer
1239 struct type
*type
= value_type (called_method
);
1240 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1241 type
= TYPE_TARGET_TYPE (type
);
1242 type
= TYPE_TARGET_TYPE (type
);
1246 if ((TYPE_CODE (type
) == TYPE_CODE_ERROR
) && expect_type
)
1247 return allocate_value (expect_type
);
1249 return allocate_value (type
);
1252 error (_("Expression of type other than \"method returning ...\" used as a method"));
1255 /* Now depending on whether we found a symbol for the method,
1256 we will either call the runtime dispatcher or the method
1259 argvec
[0] = called_method
;
1261 argvec
[2] = value_from_longest (long_type
, selector
);
1262 /* User-supplied arguments. */
1263 for (tem
= 0; tem
< nargs
; tem
++)
1264 argvec
[tem
+ 3] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1265 argvec
[tem
+ 3] = 0;
1267 if (gnu_runtime
&& (method
!= NULL
))
1269 /* Function objc_msg_lookup returns a pointer. */
1270 deprecated_set_value_type (argvec
[0],
1271 lookup_function_type (lookup_pointer_type (value_type (argvec
[0]))));
1272 argvec
[0] = call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1275 ret
= call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1282 op
= exp
->elts
[*pos
].opcode
;
1283 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1284 /* Allocate arg vector, including space for the function to be
1285 called in argvec[0] and a terminating NULL */
1286 argvec
= (struct value
**) alloca (sizeof (struct value
*) * (nargs
+ 3));
1287 if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1290 /* First, evaluate the structure into arg2 */
1293 if (noside
== EVAL_SKIP
)
1296 if (op
== STRUCTOP_MEMBER
)
1298 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1302 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1305 /* If the function is a virtual function, then the
1306 aggregate value (providing the structure) plays
1307 its part by providing the vtable. Otherwise,
1308 it is just along for the ride: call the function
1311 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1313 if (TYPE_CODE (check_typedef (value_type (arg1
)))
1314 != TYPE_CODE_METHODPTR
)
1315 error (_("Non-pointer-to-member value used in pointer-to-member "
1318 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1320 struct type
*method_type
= check_typedef (value_type (arg1
));
1321 arg1
= value_zero (method_type
, not_lval
);
1324 arg1
= cplus_method_ptr_to_value (&arg2
, arg1
);
1326 /* Now, say which argument to start evaluating from */
1329 else if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
)
1331 /* Hair for method invocations */
1335 /* First, evaluate the structure into arg2 */
1337 tem2
= longest_to_int (exp
->elts
[pc2
+ 1].longconst
);
1338 *pos
+= 3 + BYTES_TO_EXP_ELEM (tem2
+ 1);
1339 if (noside
== EVAL_SKIP
)
1342 if (op
== STRUCTOP_STRUCT
)
1344 /* If v is a variable in a register, and the user types
1345 v.method (), this will produce an error, because v has
1348 A possible way around this would be to allocate a
1349 copy of the variable on the stack, copy in the
1350 contents, call the function, and copy out the
1351 contents. I.e. convert this from call by reference
1352 to call by copy-return (or whatever it's called).
1353 However, this does not work because it is not the
1354 same: the method being called could stash a copy of
1355 the address, and then future uses through that address
1356 (after the method returns) would be expected to
1357 use the variable itself, not some copy of it. */
1358 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1362 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1364 /* Now, say which argument to start evaluating from */
1369 /* Non-method function call */
1371 argvec
[0] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1373 type
= value_type (argvec
[0]);
1374 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1375 type
= TYPE_TARGET_TYPE (type
);
1376 if (type
&& TYPE_CODE (type
) == TYPE_CODE_FUNC
)
1378 for (; tem
<= nargs
&& tem
<= TYPE_NFIELDS (type
); tem
++)
1380 /* pai: FIXME This seems to be coercing arguments before
1381 * overload resolution has been done! */
1382 argvec
[tem
] = evaluate_subexp (TYPE_FIELD_TYPE (type
, tem
- 1),
1388 /* Evaluate arguments */
1389 for (; tem
<= nargs
; tem
++)
1391 /* Ensure that array expressions are coerced into pointer objects. */
1392 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1395 /* signal end of arglist */
1398 if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
)
1400 int static_memfuncp
;
1403 /* Method invocation : stuff "this" as first parameter */
1405 /* Name of method from expression */
1406 strcpy (tstr
, &exp
->elts
[pc2
+ 2].string
);
1408 if (overload_resolution
&& (exp
->language_defn
->la_language
== language_cplus
))
1410 /* Language is C++, do some overload resolution before evaluation */
1411 struct value
*valp
= NULL
;
1413 /* Prepare list of argument types for overload resolution */
1414 arg_types
= (struct type
**) alloca (nargs
* (sizeof (struct type
*)));
1415 for (ix
= 1; ix
<= nargs
; ix
++)
1416 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1418 (void) find_overload_match (arg_types
, nargs
, tstr
,
1419 1 /* method */ , 0 /* strict match */ ,
1420 &arg2
/* the object */ , NULL
,
1421 &valp
, NULL
, &static_memfuncp
);
1424 argvec
[1] = arg2
; /* the ``this'' pointer */
1425 argvec
[0] = valp
; /* use the method found after overload resolution */
1428 /* Non-C++ case -- or no overload resolution */
1430 struct value
*temp
= arg2
;
1431 argvec
[0] = value_struct_elt (&temp
, argvec
+ 1, tstr
,
1433 op
== STRUCTOP_STRUCT
1434 ? "structure" : "structure pointer");
1435 /* value_struct_elt updates temp with the correct value
1436 of the ``this'' pointer if necessary, so modify argvec[1] to
1437 reflect any ``this'' changes. */
1438 arg2
= value_from_longest (lookup_pointer_type(value_type (temp
)),
1439 VALUE_ADDRESS (temp
) + value_offset (temp
)
1440 + value_embedded_offset (temp
));
1441 argvec
[1] = arg2
; /* the ``this'' pointer */
1444 if (static_memfuncp
)
1446 argvec
[1] = argvec
[0];
1451 else if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1456 else if (op
== OP_VAR_VALUE
)
1458 /* Non-member function being called */
1459 /* fn: This can only be done for C++ functions. A C-style function
1460 in a C++ program, for instance, does not have the fields that
1461 are expected here */
1463 if (overload_resolution
&& (exp
->language_defn
->la_language
== language_cplus
))
1465 /* Language is C++, do some overload resolution before evaluation */
1466 struct symbol
*symp
;
1468 /* Prepare list of argument types for overload resolution */
1469 arg_types
= (struct type
**) alloca (nargs
* (sizeof (struct type
*)));
1470 for (ix
= 1; ix
<= nargs
; ix
++)
1471 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1473 (void) find_overload_match (arg_types
, nargs
, NULL
/* no need for name */ ,
1474 0 /* not method */ , 0 /* strict match */ ,
1475 NULL
, exp
->elts
[save_pos1
+2].symbol
/* the function */ ,
1478 /* Now fix the expression being evaluated */
1479 exp
->elts
[save_pos1
+2].symbol
= symp
;
1480 argvec
[0] = evaluate_subexp_with_coercion (exp
, &save_pos1
, noside
);
1484 /* Not C++, or no overload resolution allowed */
1485 /* nothing to be done; argvec already correctly set up */
1490 /* It is probably a C-style function */
1491 /* nothing to be done; argvec already correctly set up */
1496 if (noside
== EVAL_SKIP
)
1498 if (argvec
[0] == NULL
)
1499 error (_("Cannot evaluate function -- may be inlined"));
1500 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1502 /* If the return type doesn't look like a function type, call an
1503 error. This can happen if somebody tries to turn a variable into
1504 a function call. This is here because people often want to
1505 call, eg, strcmp, which gdb doesn't know is a function. If
1506 gdb isn't asked for it's opinion (ie. through "whatis"),
1507 it won't offer it. */
1509 struct type
*ftype
=
1510 TYPE_TARGET_TYPE (value_type (argvec
[0]));
1513 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec
[0])));
1515 error (_("Expression of type other than \"Function returning ...\" used as function"));
1517 return call_function_by_hand (argvec
[0], nargs
, argvec
+ 1);
1518 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1520 case OP_F77_UNDETERMINED_ARGLIST
:
1522 /* Remember that in F77, functions, substring ops and
1523 array subscript operations cannot be disambiguated
1524 at parse time. We have made all array subscript operations,
1525 substring operations as well as function calls come here
1526 and we now have to discover what the heck this thing actually was.
1527 If it is a function, we process just as if we got an OP_FUNCALL. */
1529 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1532 /* First determine the type code we are dealing with. */
1533 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1534 type
= check_typedef (value_type (arg1
));
1535 code
= TYPE_CODE (type
);
1537 if (code
== TYPE_CODE_PTR
)
1539 /* Fortran always passes variable to subroutines as pointer.
1540 So we need to look into its target type to see if it is
1541 array, string or function. If it is, we need to switch
1542 to the target value the original one points to. */
1543 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1545 if (TYPE_CODE (target_type
) == TYPE_CODE_ARRAY
1546 || TYPE_CODE (target_type
) == TYPE_CODE_STRING
1547 || TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
1549 arg1
= value_ind (arg1
);
1550 type
= check_typedef (value_type (arg1
));
1551 code
= TYPE_CODE (type
);
1557 case TYPE_CODE_ARRAY
:
1558 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1559 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1561 goto multi_f77_subscript
;
1563 case TYPE_CODE_STRING
:
1564 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1565 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1568 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1569 return value_subscript (arg1
, arg2
);
1573 case TYPE_CODE_FUNC
:
1574 /* It's a function call. */
1575 /* Allocate arg vector, including space for the function to be
1576 called in argvec[0] and a terminating NULL */
1577 argvec
= (struct value
**) alloca (sizeof (struct value
*) * (nargs
+ 2));
1580 for (; tem
<= nargs
; tem
++)
1581 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1582 argvec
[tem
] = 0; /* signal end of arglist */
1586 error (_("Cannot perform substring on this type"));
1590 /* We have a complex number, There should be 2 floating
1591 point numbers that compose it */
1593 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1594 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1596 return value_literal_complex (arg1
, arg2
, exp
->elts
[pc
+ 1].type
);
1598 case STRUCTOP_STRUCT
:
1599 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1600 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1601 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1602 if (noside
== EVAL_SKIP
)
1604 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1605 return value_zero (lookup_struct_elt_type (value_type (arg1
),
1606 &exp
->elts
[pc
+ 2].string
,
1611 struct value
*temp
= arg1
;
1612 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
1617 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1618 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1619 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1620 if (noside
== EVAL_SKIP
)
1623 /* JYG: if print object is on we need to replace the base type
1624 with rtti type in order to continue on with successful
1625 lookup of member / method only available in the rtti type. */
1627 struct type
*type
= value_type (arg1
);
1628 struct type
*real_type
;
1629 int full
, top
, using_enc
;
1631 if (objectprint
&& TYPE_TARGET_TYPE(type
) &&
1632 (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_CLASS
))
1634 real_type
= value_rtti_target_type (arg1
, &full
, &top
, &using_enc
);
1637 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
1638 real_type
= lookup_pointer_type (real_type
);
1640 real_type
= lookup_reference_type (real_type
);
1642 arg1
= value_cast (real_type
, arg1
);
1647 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1648 return value_zero (lookup_struct_elt_type (value_type (arg1
),
1649 &exp
->elts
[pc
+ 2].string
,
1654 struct value
*temp
= arg1
;
1655 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
1656 NULL
, "structure pointer");
1659 case STRUCTOP_MEMBER
:
1661 if (op
== STRUCTOP_MEMBER
)
1662 arg1
= evaluate_subexp_for_address (exp
, pos
, noside
);
1664 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1666 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1668 if (noside
== EVAL_SKIP
)
1671 type
= check_typedef (value_type (arg2
));
1672 switch (TYPE_CODE (type
))
1674 case TYPE_CODE_METHODPTR
:
1675 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1676 return value_zero (TYPE_TARGET_TYPE (type
), not_lval
);
1679 arg2
= cplus_method_ptr_to_value (&arg1
, arg2
);
1680 gdb_assert (TYPE_CODE (value_type (arg2
)) == TYPE_CODE_PTR
);
1681 return value_ind (arg2
);
1684 case TYPE_CODE_MEMBERPTR
:
1685 /* Now, convert these values to an address. */
1686 arg1
= value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type
)),
1689 mem_offset
= value_as_long (arg2
);
1691 arg3
= value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
1692 value_as_long (arg1
) + mem_offset
);
1693 return value_ind (arg3
);
1696 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1700 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1701 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1702 if (noside
== EVAL_SKIP
)
1704 if (binop_user_defined_p (op
, arg1
, arg2
))
1705 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1707 return value_concat (arg1
, arg2
);
1710 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1711 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
1713 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
1715 if (binop_user_defined_p (op
, arg1
, arg2
))
1716 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1718 return value_assign (arg1
, arg2
);
1720 case BINOP_ASSIGN_MODIFY
:
1722 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1723 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
1724 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
1726 op
= exp
->elts
[pc
+ 1].opcode
;
1727 if (binop_user_defined_p (op
, arg1
, arg2
))
1728 return value_x_binop (arg1
, arg2
, BINOP_ASSIGN_MODIFY
, op
, noside
);
1729 else if (op
== BINOP_ADD
&& ptrmath_type_p (value_type (arg1
)))
1730 arg2
= value_ptradd (arg1
, arg2
);
1731 else if (op
== BINOP_SUB
&& ptrmath_type_p (value_type (arg1
)))
1732 arg2
= value_ptrsub (arg1
, arg2
);
1735 struct value
*tmp
= arg1
;
1737 /* For shift and integer exponentiation operations,
1738 only promote the first argument. */
1739 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
1740 && is_integral_type (value_type (arg2
)))
1741 unop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
);
1743 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
1745 arg2
= value_binop (tmp
, arg2
, op
);
1747 return value_assign (arg1
, arg2
);
1750 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1751 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1752 if (noside
== EVAL_SKIP
)
1754 if (binop_user_defined_p (op
, arg1
, arg2
))
1755 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1756 else if (ptrmath_type_p (value_type (arg1
)))
1757 return value_ptradd (arg1
, arg2
);
1758 else if (ptrmath_type_p (value_type (arg2
)))
1759 return value_ptradd (arg2
, arg1
);
1762 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
1763 return value_binop (arg1
, arg2
, BINOP_ADD
);
1767 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1768 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1769 if (noside
== EVAL_SKIP
)
1771 if (binop_user_defined_p (op
, arg1
, arg2
))
1772 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1773 else if (ptrmath_type_p (value_type (arg1
)))
1775 if (ptrmath_type_p (value_type (arg2
)))
1777 /* FIXME -- should be ptrdiff_t */
1778 type
= builtin_type (exp
->gdbarch
)->builtin_long
;
1779 return value_from_longest (type
, value_ptrdiff (arg1
, arg2
));
1782 return value_ptrsub (arg1
, arg2
);
1786 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
1787 return value_binop (arg1
, arg2
, BINOP_SUB
);
1798 case BINOP_BITWISE_AND
:
1799 case BINOP_BITWISE_IOR
:
1800 case BINOP_BITWISE_XOR
:
1801 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1802 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1803 if (noside
== EVAL_SKIP
)
1805 if (binop_user_defined_p (op
, arg1
, arg2
))
1806 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1809 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1810 fudge arg2 to avoid division-by-zero, the caller is
1811 (theoretically) only looking for the type of the result. */
1812 if (noside
== EVAL_AVOID_SIDE_EFFECTS
1813 /* ??? Do we really want to test for BINOP_MOD here?
1814 The implementation of value_binop gives it a well-defined
1817 || op
== BINOP_INTDIV
1820 && value_logical_not (arg2
))
1822 struct value
*v_one
, *retval
;
1824 v_one
= value_one (value_type (arg2
), not_lval
);
1825 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &v_one
);
1826 retval
= value_binop (arg1
, v_one
, op
);
1831 /* For shift and integer exponentiation operations,
1832 only promote the first argument. */
1833 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
1834 && is_integral_type (value_type (arg2
)))
1835 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
1837 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
1839 return value_binop (arg1
, arg2
, op
);
1844 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1845 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1846 if (noside
== EVAL_SKIP
)
1848 error (_("':' operator used in invalid context"));
1850 case BINOP_SUBSCRIPT
:
1851 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1852 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1853 if (noside
== EVAL_SKIP
)
1855 if (binop_user_defined_p (op
, arg1
, arg2
))
1856 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1859 /* If the user attempts to subscript something that is not an
1860 array or pointer type (like a plain int variable for example),
1861 then report this as an error. */
1863 arg1
= coerce_ref (arg1
);
1864 type
= check_typedef (value_type (arg1
));
1865 if (TYPE_CODE (type
) != TYPE_CODE_ARRAY
1866 && TYPE_CODE (type
) != TYPE_CODE_PTR
)
1868 if (TYPE_NAME (type
))
1869 error (_("cannot subscript something of type `%s'"),
1872 error (_("cannot subscript requested type"));
1875 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1876 return value_zero (TYPE_TARGET_TYPE (type
), VALUE_LVAL (arg1
));
1878 return value_subscript (arg1
, arg2
);
1882 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1883 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1884 if (noside
== EVAL_SKIP
)
1886 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
1887 return value_from_longest (type
, (LONGEST
) value_in (arg1
, arg2
));
1889 case MULTI_SUBSCRIPT
:
1891 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1892 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1895 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1896 /* FIXME: EVAL_SKIP handling may not be correct. */
1897 if (noside
== EVAL_SKIP
)
1908 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1909 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1911 /* If the user attempts to subscript something that has no target
1912 type (like a plain int variable for example), then report this
1915 type
= TYPE_TARGET_TYPE (check_typedef (value_type (arg1
)));
1918 arg1
= value_zero (type
, VALUE_LVAL (arg1
));
1924 error (_("cannot subscript something of type `%s'"),
1925 TYPE_NAME (value_type (arg1
)));
1929 if (binop_user_defined_p (op
, arg1
, arg2
))
1931 arg1
= value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1935 arg1
= coerce_ref (arg1
);
1936 type
= check_typedef (value_type (arg1
));
1938 switch (TYPE_CODE (type
))
1941 case TYPE_CODE_ARRAY
:
1942 case TYPE_CODE_STRING
:
1943 arg1
= value_subscript (arg1
, arg2
);
1946 case TYPE_CODE_BITSTRING
:
1947 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
1948 arg1
= value_bitstring_subscript (type
, arg1
, arg2
);
1952 if (TYPE_NAME (type
))
1953 error (_("cannot subscript something of type `%s'"),
1956 error (_("cannot subscript requested type"));
1962 multi_f77_subscript
:
1964 int subscript_array
[MAX_FORTRAN_DIMS
];
1965 int array_size_array
[MAX_FORTRAN_DIMS
];
1966 int ndimensions
= 1, i
;
1967 struct type
*tmp_type
;
1968 int offset_item
; /* The array offset where the item lives */
1970 if (nargs
> MAX_FORTRAN_DIMS
)
1971 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS
);
1973 tmp_type
= check_typedef (value_type (arg1
));
1974 ndimensions
= calc_f77_array_dims (type
);
1976 if (nargs
!= ndimensions
)
1977 error (_("Wrong number of subscripts"));
1979 /* Now that we know we have a legal array subscript expression
1980 let us actually find out where this element exists in the array. */
1983 /* Take array indices left to right */
1984 for (i
= 0; i
< nargs
; i
++)
1986 /* Evaluate each subscript, It must be a legal integer in F77 */
1987 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1989 /* Fill in the subscript and array size arrays */
1991 subscript_array
[i
] = value_as_long (arg2
);
1994 /* Internal type of array is arranged right to left */
1995 for (i
= 0; i
< nargs
; i
++)
1997 upper
= f77_get_upperbound (tmp_type
);
1998 lower
= f77_get_lowerbound (tmp_type
);
2000 array_size_array
[nargs
- i
- 1] = upper
- lower
+ 1;
2002 /* Zero-normalize subscripts so that offsetting will work. */
2004 subscript_array
[nargs
- i
- 1] -= lower
;
2006 /* If we are at the bottom of a multidimensional
2007 array type then keep a ptr to the last ARRAY
2008 type around for use when calling value_subscript()
2009 below. This is done because we pretend to value_subscript
2010 that we actually have a one-dimensional array
2011 of base element type that we apply a simple
2015 tmp_type
= check_typedef (TYPE_TARGET_TYPE (tmp_type
));
2018 /* Now let us calculate the offset for this item */
2020 offset_item
= subscript_array
[ndimensions
- 1];
2022 for (i
= ndimensions
- 1; i
> 0; --i
)
2024 array_size_array
[i
- 1] * offset_item
+ subscript_array
[i
- 1];
2026 /* Construct a value node with the value of the offset */
2028 arg2
= value_from_longest (builtin_type_int32
, offset_item
);
2030 /* Let us now play a dirty trick: we will take arg1
2031 which is a value node pointing to the topmost level
2032 of the multidimensional array-set and pretend
2033 that it is actually a array of the final element
2034 type, this will ensure that value_subscript()
2035 returns the correct type value */
2037 deprecated_set_value_type (arg1
, tmp_type
);
2038 return value_subscripted_rvalue (arg1
, arg2
, 0);
2041 case BINOP_LOGICAL_AND
:
2042 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2043 if (noside
== EVAL_SKIP
)
2045 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2050 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2053 if (binop_user_defined_p (op
, arg1
, arg2
))
2055 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2056 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2060 tem
= value_logical_not (arg1
);
2061 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2062 (tem
? EVAL_SKIP
: noside
));
2063 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2064 return value_from_longest (type
,
2065 (LONGEST
) (!tem
&& !value_logical_not (arg2
)));
2068 case BINOP_LOGICAL_OR
:
2069 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2070 if (noside
== EVAL_SKIP
)
2072 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2077 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2080 if (binop_user_defined_p (op
, arg1
, arg2
))
2082 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2083 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2087 tem
= value_logical_not (arg1
);
2088 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2089 (!tem
? EVAL_SKIP
: noside
));
2090 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2091 return value_from_longest (type
,
2092 (LONGEST
) (!tem
|| !value_logical_not (arg2
)));
2096 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2097 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2098 if (noside
== EVAL_SKIP
)
2100 if (binop_user_defined_p (op
, arg1
, arg2
))
2102 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2106 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2107 tem
= value_equal (arg1
, arg2
);
2108 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2109 return value_from_longest (type
, (LONGEST
) tem
);
2112 case BINOP_NOTEQUAL
:
2113 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2114 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2115 if (noside
== EVAL_SKIP
)
2117 if (binop_user_defined_p (op
, arg1
, arg2
))
2119 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2123 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2124 tem
= value_equal (arg1
, arg2
);
2125 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2126 return value_from_longest (type
, (LONGEST
) ! tem
);
2130 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2131 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2132 if (noside
== EVAL_SKIP
)
2134 if (binop_user_defined_p (op
, arg1
, arg2
))
2136 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2140 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2141 tem
= value_less (arg1
, arg2
);
2142 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2143 return value_from_longest (type
, (LONGEST
) tem
);
2147 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2148 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2149 if (noside
== EVAL_SKIP
)
2151 if (binop_user_defined_p (op
, arg1
, arg2
))
2153 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2157 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2158 tem
= value_less (arg2
, arg1
);
2159 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2160 return value_from_longest (type
, (LONGEST
) tem
);
2164 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2165 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2166 if (noside
== EVAL_SKIP
)
2168 if (binop_user_defined_p (op
, arg1
, arg2
))
2170 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2174 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2175 tem
= value_less (arg2
, arg1
) || value_equal (arg1
, arg2
);
2176 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2177 return value_from_longest (type
, (LONGEST
) tem
);
2181 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2182 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2183 if (noside
== EVAL_SKIP
)
2185 if (binop_user_defined_p (op
, arg1
, arg2
))
2187 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2191 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2192 tem
= value_less (arg1
, arg2
) || value_equal (arg1
, arg2
);
2193 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2194 return value_from_longest (type
, (LONGEST
) tem
);
2198 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2199 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2200 if (noside
== EVAL_SKIP
)
2202 type
= check_typedef (value_type (arg2
));
2203 if (TYPE_CODE (type
) != TYPE_CODE_INT
)
2204 error (_("Non-integral right operand for \"@\" operator."));
2205 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2207 return allocate_repeat_value (value_type (arg1
),
2208 longest_to_int (value_as_long (arg2
)));
2211 return value_repeat (arg1
, longest_to_int (value_as_long (arg2
)));
2214 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2215 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2218 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2219 if (noside
== EVAL_SKIP
)
2221 if (unop_user_defined_p (op
, arg1
))
2222 return value_x_unop (arg1
, op
, noside
);
2225 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2226 return value_pos (arg1
);
2230 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2231 if (noside
== EVAL_SKIP
)
2233 if (unop_user_defined_p (op
, arg1
))
2234 return value_x_unop (arg1
, op
, noside
);
2237 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2238 return value_neg (arg1
);
2241 case UNOP_COMPLEMENT
:
2242 /* C++: check for and handle destructor names. */
2243 op
= exp
->elts
[*pos
].opcode
;
2245 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2246 if (noside
== EVAL_SKIP
)
2248 if (unop_user_defined_p (UNOP_COMPLEMENT
, arg1
))
2249 return value_x_unop (arg1
, UNOP_COMPLEMENT
, noside
);
2252 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2253 return value_complement (arg1
);
2256 case UNOP_LOGICAL_NOT
:
2257 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2258 if (noside
== EVAL_SKIP
)
2260 if (unop_user_defined_p (op
, arg1
))
2261 return value_x_unop (arg1
, op
, noside
);
2264 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2265 return value_from_longest (type
, (LONGEST
) value_logical_not (arg1
));
2269 if (expect_type
&& TYPE_CODE (expect_type
) == TYPE_CODE_PTR
)
2270 expect_type
= TYPE_TARGET_TYPE (check_typedef (expect_type
));
2271 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2272 type
= check_typedef (value_type (arg1
));
2273 if (TYPE_CODE (type
) == TYPE_CODE_METHODPTR
2274 || TYPE_CODE (type
) == TYPE_CODE_MEMBERPTR
)
2275 error (_("Attempt to dereference pointer to member without an object"));
2276 if (noside
== EVAL_SKIP
)
2278 if (unop_user_defined_p (op
, arg1
))
2279 return value_x_unop (arg1
, op
, noside
);
2280 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2282 type
= check_typedef (value_type (arg1
));
2283 if (TYPE_CODE (type
) == TYPE_CODE_PTR
2284 || TYPE_CODE (type
) == TYPE_CODE_REF
2285 /* In C you can dereference an array to get the 1st elt. */
2286 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
2288 return value_zero (TYPE_TARGET_TYPE (type
),
2290 else if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2291 /* GDB allows dereferencing an int. */
2292 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
2295 error (_("Attempt to take contents of a non-pointer value."));
2298 /* Allow * on an integer so we can cast it to whatever we want.
2299 This returns an int, which seems like the most C-like thing to
2300 do. "long long" variables are rare enough that
2301 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2302 if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2303 return value_at_lazy (builtin_type (exp
->gdbarch
)->builtin_int
,
2304 (CORE_ADDR
) value_as_address (arg1
));
2305 return value_ind (arg1
);
2308 /* C++: check for and handle pointer to members. */
2310 op
= exp
->elts
[*pos
].opcode
;
2312 if (noside
== EVAL_SKIP
)
2314 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2319 struct value
*retvalp
= evaluate_subexp_for_address (exp
, pos
, noside
);
2324 if (noside
== EVAL_SKIP
)
2326 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2329 return evaluate_subexp_for_sizeof (exp
, pos
);
2333 type
= exp
->elts
[pc
+ 1].type
;
2334 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2335 if (noside
== EVAL_SKIP
)
2337 if (type
!= value_type (arg1
))
2338 arg1
= value_cast (type
, arg1
);
2343 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2344 if (noside
== EVAL_SKIP
)
2346 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2347 return value_zero (exp
->elts
[pc
+ 1].type
, lval_memory
);
2349 return value_at_lazy (exp
->elts
[pc
+ 1].type
,
2350 value_as_address (arg1
));
2352 case UNOP_MEMVAL_TLS
:
2354 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2355 if (noside
== EVAL_SKIP
)
2357 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2358 return value_zero (exp
->elts
[pc
+ 2].type
, lval_memory
);
2362 tls_addr
= target_translate_tls_address (exp
->elts
[pc
+ 1].objfile
,
2363 value_as_address (arg1
));
2364 return value_at_lazy (exp
->elts
[pc
+ 2].type
, tls_addr
);
2367 case UNOP_PREINCREMENT
:
2368 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2369 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2371 else if (unop_user_defined_p (op
, arg1
))
2373 return value_x_unop (arg1
, op
, noside
);
2377 arg2
= value_from_longest (builtin_type_uint8
, (LONGEST
) 1);
2378 if (ptrmath_type_p (value_type (arg1
)))
2379 arg2
= value_ptradd (arg1
, arg2
);
2382 struct value
*tmp
= arg1
;
2383 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2384 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2387 return value_assign (arg1
, arg2
);
2390 case UNOP_PREDECREMENT
:
2391 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2392 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2394 else if (unop_user_defined_p (op
, arg1
))
2396 return value_x_unop (arg1
, op
, noside
);
2400 arg2
= value_from_longest (builtin_type_uint8
, (LONGEST
) 1);
2401 if (ptrmath_type_p (value_type (arg1
)))
2402 arg2
= value_ptrsub (arg1
, arg2
);
2405 struct value
*tmp
= arg1
;
2406 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2407 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2410 return value_assign (arg1
, arg2
);
2413 case UNOP_POSTINCREMENT
:
2414 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2415 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2417 else if (unop_user_defined_p (op
, arg1
))
2419 return value_x_unop (arg1
, op
, noside
);
2423 arg2
= value_from_longest (builtin_type_uint8
, (LONGEST
) 1);
2424 if (ptrmath_type_p (value_type (arg1
)))
2425 arg2
= value_ptradd (arg1
, arg2
);
2428 struct value
*tmp
= arg1
;
2429 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2430 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2433 value_assign (arg1
, arg2
);
2437 case UNOP_POSTDECREMENT
:
2438 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2439 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2441 else if (unop_user_defined_p (op
, arg1
))
2443 return value_x_unop (arg1
, op
, noside
);
2447 arg2
= value_from_longest (builtin_type_uint8
, (LONGEST
) 1);
2448 if (ptrmath_type_p (value_type (arg1
)))
2449 arg2
= value_ptrsub (arg1
, arg2
);
2452 struct value
*tmp
= arg1
;
2453 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2454 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2457 value_assign (arg1
, arg2
);
2463 return value_of_this (1);
2467 return value_of_local ("self", 1);
2470 /* The value is not supposed to be used. This is here to make it
2471 easier to accommodate expressions that contain types. */
2473 if (noside
== EVAL_SKIP
)
2475 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2476 return allocate_value (exp
->elts
[pc
+ 1].type
);
2478 error (_("Attempt to use a type name as an expression"));
2481 /* Removing this case and compiling with gcc -Wall reveals that
2482 a lot of cases are hitting this case. Some of these should
2483 probably be removed from expression.h; others are legitimate
2484 expressions which are (apparently) not fully implemented.
2486 If there are any cases landing here which mean a user error,
2487 then they should be separate cases, with more descriptive
2491 GDB does not (yet) know how to evaluate that kind of expression"));
2495 return value_from_longest (builtin_type_int8
, (LONGEST
) 1);
2498 /* Evaluate a subexpression of EXP, at index *POS,
2499 and return the address of that subexpression.
2500 Advance *POS over the subexpression.
2501 If the subexpression isn't an lvalue, get an error.
2502 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2503 then only the type of the result need be correct. */
2505 static struct value
*
2506 evaluate_subexp_for_address (struct expression
*exp
, int *pos
,
2516 op
= exp
->elts
[pc
].opcode
;
2522 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2524 /* We can't optimize out "&*" if there's a user-defined operator*. */
2525 if (unop_user_defined_p (op
, x
))
2527 x
= value_x_unop (x
, op
, noside
);
2528 goto default_case_after_eval
;
2535 return value_cast (lookup_pointer_type (exp
->elts
[pc
+ 1].type
),
2536 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
2539 var
= exp
->elts
[pc
+ 2].symbol
;
2541 /* C++: The "address" of a reference should yield the address
2542 * of the object pointed to. Let value_addr() deal with it. */
2543 if (TYPE_CODE (SYMBOL_TYPE (var
)) == TYPE_CODE_REF
)
2547 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2550 lookup_pointer_type (SYMBOL_TYPE (var
));
2551 enum address_class sym_class
= SYMBOL_CLASS (var
);
2553 if (sym_class
== LOC_CONST
2554 || sym_class
== LOC_CONST_BYTES
2555 || sym_class
== LOC_REGISTER
)
2556 error (_("Attempt to take address of register or constant."));
2559 value_zero (type
, not_lval
);
2561 else if (symbol_read_needs_frame (var
))
2565 block_innermost_frame (exp
->elts
[pc
+ 1].block
));
2567 return locate_var_value (var
, NULL
);
2570 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
2571 (*pos
) += 5 + BYTES_TO_EXP_ELEM (tem
+ 1);
2572 x
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
2573 &exp
->elts
[pc
+ 3].string
,
2576 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
2581 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2582 default_case_after_eval
:
2583 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2585 struct type
*type
= check_typedef (value_type (x
));
2587 if (VALUE_LVAL (x
) == lval_memory
|| value_must_coerce_to_target (x
))
2588 return value_zero (lookup_pointer_type (value_type (x
)),
2590 else if (TYPE_CODE (type
) == TYPE_CODE_REF
)
2591 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2594 error (_("Attempt to take address of value not located in memory."));
2596 return value_addr (x
);
2600 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2601 When used in contexts where arrays will be coerced anyway, this is
2602 equivalent to `evaluate_subexp' but much faster because it avoids
2603 actually fetching array contents (perhaps obsolete now that we have
2606 Note that we currently only do the coercion for C expressions, where
2607 arrays are zero based and the coercion is correct. For other languages,
2608 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2609 to decide if coercion is appropriate.
2614 evaluate_subexp_with_coercion (struct expression
*exp
,
2615 int *pos
, enum noside noside
)
2623 op
= exp
->elts
[pc
].opcode
;
2628 var
= exp
->elts
[pc
+ 2].symbol
;
2629 if (TYPE_CODE (check_typedef (SYMBOL_TYPE (var
))) == TYPE_CODE_ARRAY
2630 && CAST_IS_CONVERSION
)
2635 (var
, block_innermost_frame (exp
->elts
[pc
+ 1].block
));
2636 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (check_typedef (SYMBOL_TYPE (var
)))),
2642 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2646 /* Evaluate a subexpression of EXP, at index *POS,
2647 and return a value for the size of that subexpression.
2648 Advance *POS over the subexpression. */
2650 static struct value
*
2651 evaluate_subexp_for_sizeof (struct expression
*exp
, int *pos
)
2653 /* FIXME: This should be size_t. */
2654 struct type
*size_type
= builtin_type (exp
->gdbarch
)->builtin_int
;
2661 op
= exp
->elts
[pc
].opcode
;
2665 /* This case is handled specially
2666 so that we avoid creating a value for the result type.
2667 If the result type is very big, it's desirable not to
2668 create a value unnecessarily. */
2671 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2672 type
= check_typedef (value_type (val
));
2673 if (TYPE_CODE (type
) != TYPE_CODE_PTR
2674 && TYPE_CODE (type
) != TYPE_CODE_REF
2675 && TYPE_CODE (type
) != TYPE_CODE_ARRAY
)
2676 error (_("Attempt to take contents of a non-pointer value."));
2677 type
= check_typedef (TYPE_TARGET_TYPE (type
));
2678 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
2682 type
= check_typedef (exp
->elts
[pc
+ 1].type
);
2683 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
2687 type
= check_typedef (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
));
2689 value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
2692 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2693 return value_from_longest (size_type
,
2694 (LONGEST
) TYPE_LENGTH (value_type (val
)));
2698 /* Parse a type expression in the string [P..P+LENGTH). */
2701 parse_and_eval_type (char *p
, int length
)
2703 char *tmp
= (char *) alloca (length
+ 4);
2704 struct expression
*expr
;
2706 memcpy (tmp
+ 1, p
, length
);
2707 tmp
[length
+ 1] = ')';
2708 tmp
[length
+ 2] = '0';
2709 tmp
[length
+ 3] = '\0';
2710 expr
= parse_expression (tmp
);
2711 if (expr
->elts
[0].opcode
!= UNOP_CAST
)
2712 error (_("Internal error in eval_type."));
2713 return expr
->elts
[1].type
;
2717 calc_f77_array_dims (struct type
*array_type
)
2720 struct type
*tmp_type
;
2722 if ((TYPE_CODE (array_type
) != TYPE_CODE_ARRAY
))
2723 error (_("Can't get dimensions for a non-array type"));
2725 tmp_type
= array_type
;
2727 while ((tmp_type
= TYPE_TARGET_TYPE (tmp_type
)))
2729 if (TYPE_CODE (tmp_type
) == TYPE_CODE_ARRAY
)