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");
1080 msg_send_stret = find_function_in_inferior ("objc_msg_lookup");
1082 msg_send = value_from_pointer (type, value_as_address (msg_send));
1083 msg_send_stret = value_from_pointer (type,
1084 value_as_address (msg_send_stret));
1088 msg_send = find_function_in_inferior ("objc_msgSend");
1089 /* Special dispatcher for methods returning structs */
1090 msg_send_stret = find_function_in_inferior ("objc_msgSend_stret");
1093 /* Verify the target object responds to this method. The
1094 standard top-level 'Object' class uses a different name for
1095 the verification method than the non-standard, but more
1096 often used, 'NSObject' class. Make sure we check for both. */
1098 responds_selector = lookup_child_selector ("respondsToSelector:");
1099 if (responds_selector == 0)
1100 responds_selector = lookup_child_selector ("respondsTo:");
1102 if (responds_selector == 0)
1103 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1105 method_selector = lookup_child_selector ("methodForSelector:");
1106 if (method_selector == 0)
1107 method_selector = lookup_child_selector ("methodFor:");
1109 if (method_selector == 0)
1110 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1112 /* Call the verification method, to make sure that the target
1113 class implements the desired method. */
1115 argvec[0] = msg_send;
1117 argvec[2] = value_from_longest (long_type, responds_selector);
1118 argvec[3] = value_from_longest (long_type, selector);
1121 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1124 /* Function objc_msg_lookup returns a pointer. */
1126 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1128 if (value_as_long (ret) == 0)
1129 error (_("Target does not respond to this message selector."));
1131 /* Call "methodForSelector:" method, to get the address of a
1132 function method that implements this selector for this
1133 class. If we can find a symbol at that address, then we
1134 know the return type, parameter types etc. (that's a good
1137 argvec[0] = msg_send;
1139 argvec[2] = value_from_longest (long_type, method_selector);
1140 argvec[3] = value_from_longest (long_type, selector);
1143 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1147 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1150 /* ret should now be the selector. */
1152 addr = value_as_long (ret);
1155 struct symbol *sym = NULL;
1156 /* Is it a high_level symbol? */
1158 sym = find_pc_function (addr);
1160 method = value_of_variable (sym, 0);
1163 /* If we found a method with symbol information, check to see
1164 if it returns a struct. Otherwise assume it doesn't. */
1170 struct type *val_type;
1172 funaddr = find_function_addr (method, &val_type);
1174 b = block_for_pc (funaddr);
1176 CHECK_TYPEDEF (val_type);
1178 if ((val_type == NULL)
1179 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1181 if (expect_type != NULL)
1182 val_type = expect_type;
1185 struct_return = using_struct_return (value_type (method), val_type);
1187 else if (expect_type != NULL)
1189 struct_return = using_struct_return (NULL,
1190 check_typedef (expect_type));
1193 /* Found a function symbol. Now we will substitute its
1194 value in place of the message dispatcher (obj_msgSend),
1195 so that we call the method directly instead of thru
1196 the dispatcher. The main reason for doing this is that
1197 we can now evaluate the return value and parameter values
1198 according to their known data types, in case we need to
1199 do things like promotion, dereferencing, special handling
1200 of structs and doubles, etc.
1202 We want to use the type signature of 'method', but still
1203 jump to objc_msgSend() or objc_msgSend_stret() to better
1204 mimic the behavior of the runtime. */
1208 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1209 error (_("method address has symbol information with non-function type; skipping"));
1211 VALUE_ADDRESS (method) = value_as_address (msg_send_stret);
1213 VALUE_ADDRESS (method) = value_as_address (msg_send);
1214 called_method = method;
1219 called_method = msg_send_stret;
1221 called_method = msg_send;
1224 if (noside == EVAL_SKIP)
1227 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1229 /* If the return type doesn't look like a function type,
1230 call an error. This can happen if somebody tries to
1231 turn a variable into a function call. This is here
1232 because people often want to call, eg, strcmp, which
1233 gdb doesn't know is a function. If gdb isn't asked for
1234 it's opinion (ie. through "whatis"), it won't offer
1237 struct type *type = value_type (called_method);
1238 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1239 type = TYPE_TARGET_TYPE (type);
1240 type = TYPE_TARGET_TYPE (type);
1244 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1245 return allocate_value (expect_type);
1247 return allocate_value (type);
1250 error (_("Expression of type other than \"method returning ...\" used as a method"));
1253 /* Now depending on whether we found a symbol for the method,
1254 we will either call the runtime dispatcher or the method
1257 argvec[0] = called_method;
1259 argvec[2] = value_from_longest (long_type, selector);
1260 /* User-supplied arguments. */
1261 for (tem = 0; tem < nargs; tem++)
1262 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1263 argvec[tem + 3] = 0;
1265 if (gnu_runtime && (method != NULL))
1267 /* Function objc_msg_lookup returns a pointer. */
1268 deprecated_set_value_type (argvec[0],
1269 lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
1270 argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1273 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1280 op = exp->elts[*pos].opcode;
1281 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1282 /* Allocate arg vector, including space for the function to be
1283 called in argvec[0] and a terminating NULL */
1284 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
1285 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1288 /* First, evaluate the structure into arg2 */
1291 if (noside == EVAL_SKIP)
1294 if (op == STRUCTOP_MEMBER)
1296 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1300 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1303 /* If the function is a virtual function, then the
1304 aggregate value (providing the structure) plays
1305 its part by providing the vtable. Otherwise,
1306 it is just along for the ride: call the function
1309 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1311 if (TYPE_CODE (check_typedef (value_type (arg1)))
1312 != TYPE_CODE_METHODPTR)
1313 error (_("Non-pointer-to-member value used in pointer-to-member "
1316 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1318 struct type *method_type = check_typedef (value_type (arg1));
1319 arg1 = value_zero (method_type, not_lval);
1322 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1324 /* Now, say which argument to start evaluating from */
1327 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1329 /* Hair for method invocations */
1333 /* First, evaluate the structure into arg2 */
1335 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1336 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1337 if (noside == EVAL_SKIP)
1340 if (op == STRUCTOP_STRUCT)
1342 /* If v is a variable in a register, and the user types
1343 v.method (), this will produce an error, because v has
1346 A possible way around this would be to allocate a
1347 copy of the variable on the stack, copy in the
1348 contents, call the function, and copy out the
1349 contents. I.e. convert this from call by reference
1350 to call by copy-return (or whatever it's called).
1351 However, this does not work because it is not the
1352 same: the method being called could stash a copy of
1353 the address, and then future uses through that address
1354 (after the method returns) would be expected to
1355 use the variable itself, not some copy of it. */
1356 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1360 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1362 /* Now, say which argument to start evaluating from */
1367 /* Non-method function call */
1369 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1371 type = value_type (argvec[0]);
1372 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1373 type = TYPE_TARGET_TYPE (type);
1374 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1376 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1378 /* pai: FIXME This seems to be coercing arguments before
1379 * overload resolution has been done! */
1380 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
1386 /* Evaluate arguments */
1387 for (; tem <= nargs; tem++)
1389 /* Ensure that array expressions are coerced into pointer objects. */
1390 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1393 /* signal end of arglist */
1396 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1398 int static_memfuncp;
1401 /* Method invocation : stuff "this" as first parameter */
1403 /* Name of method from expression */
1404 strcpy (tstr, &exp->elts[pc2 + 2].string);
1406 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1408 /* Language is C++, do some overload resolution before evaluation */
1409 struct value *valp = NULL;
1411 /* Prepare list of argument types for overload resolution */
1412 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1413 for (ix = 1; ix <= nargs; ix++)
1414 arg_types[ix - 1] = value_type (argvec[ix]);
1416 (void) find_overload_match (arg_types, nargs, tstr,
1417 1 /* method */ , 0 /* strict match */ ,
1418 &arg2 /* the object */ , NULL,
1419 &valp, NULL, &static_memfuncp);
1422 argvec[1] = arg2; /* the ``this'' pointer */
1423 argvec[0] = valp; /* use the method found after overload resolution */
1426 /* Non-C++ case -- or no overload resolution */
1428 struct value *temp = arg2;
1429 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1431 op == STRUCTOP_STRUCT
1432 ? "structure" : "structure pointer");
1433 /* value_struct_elt updates temp with the correct value
1434 of the ``this'' pointer if necessary, so modify argvec[1] to
1435 reflect any ``this'' changes. */
1436 arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
1437 VALUE_ADDRESS (temp) + value_offset (temp)
1438 + value_embedded_offset (temp));
1439 argvec[1] = arg2; /* the ``this'' pointer */
1442 if (static_memfuncp)
1444 argvec[1] = argvec[0];
1449 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1454 else if (op == OP_VAR_VALUE)
1456 /* Non-member function being called */
1457 /* fn: This can only be done for C++ functions. A C-style function
1458 in a C++ program, for instance, does not have the fields that
1459 are expected here */
1461 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1463 /* Language is C++, do some overload resolution before evaluation */
1464 struct symbol *symp;
1466 /* Prepare list of argument types for overload resolution */
1467 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1468 for (ix = 1; ix <= nargs; ix++)
1469 arg_types[ix - 1] = value_type (argvec[ix]);
1471 (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
1472 0 /* not method */ , 0 /* strict match */ ,
1473 NULL, exp->elts[save_pos1+2].symbol /* the function */ ,
1476 /* Now fix the expression being evaluated */
1477 exp->elts[save_pos1+2].symbol = symp;
1478 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1482 /* Not C++, or no overload resolution allowed */
1483 /* nothing to be done; argvec already correctly set up */
1488 /* It is probably a C-style function */
1489 /* nothing to be done; argvec already correctly set up */
1494 if (noside == EVAL_SKIP)
1496 if (argvec[0] == NULL)
1497 error (_("Cannot evaluate function -- may be inlined"));
1498 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1500 /* If the return type doesn't look like a function type, call an
1501 error. This can happen if somebody tries to turn a variable into
1502 a function call. This is here because people often want to
1503 call, eg, strcmp, which gdb doesn't know is a function. If
1504 gdb isn't asked for it's opinion (ie. through "whatis"),
1505 it won't offer it. */
1507 struct type *ftype =
1508 TYPE_TARGET_TYPE (value_type (argvec[0]));
1511 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
1513 error (_("Expression of type other than \"Function returning ...\" used as function"));
1515 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1516 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1518 case OP_F77_UNDETERMINED_ARGLIST:
1520 /* Remember that in F77, functions, substring ops and
1521 array subscript operations cannot be disambiguated
1522 at parse time. We have made all array subscript operations,
1523 substring operations as well as function calls come here
1524 and we now have to discover what the heck this thing actually was.
1525 If it is a function, we process just as if we got an OP_FUNCALL. */
1527 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1530 /* First determine the type code we are dealing with. */
1531 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1532 type = check_typedef (value_type (arg1));
1533 code = TYPE_CODE (type);
1535 if (code == TYPE_CODE_PTR)
1537 /* Fortran always passes variable to subroutines as pointer.
1538 So we need to look into its target type to see if it is
1539 array, string or function. If it is, we need to switch
1540 to the target value the original one points to. */
1541 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1543 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1544 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1545 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1547 arg1 = value_ind (arg1);
1548 type = check_typedef (value_type (arg1));
1549 code = TYPE_CODE (type);
1555 case TYPE_CODE_ARRAY:
1556 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1557 return value_f90_subarray (arg1, exp, pos, noside);
1559 goto multi_f77_subscript;
1561 case TYPE_CODE_STRING:
1562 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1563 return value_f90_subarray (arg1, exp, pos, noside);
1566 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1567 return value_subscript (arg1, arg2);
1571 case TYPE_CODE_FUNC:
1572 /* It's a function call. */
1573 /* Allocate arg vector, including space for the function to be
1574 called in argvec[0] and a terminating NULL */
1575 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
1578 for (; tem <= nargs; tem++)
1579 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1580 argvec[tem] = 0; /* signal end of arglist */
1584 error (_("Cannot perform substring on this type"));
1588 /* We have a complex number, There should be 2 floating
1589 point numbers that compose it */
1591 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1592 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1594 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1596 case STRUCTOP_STRUCT:
1597 tem = longest_to_int (exp->elts[pc + 1].longconst);
1598 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1599 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1600 if (noside == EVAL_SKIP)
1602 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1603 return value_zero (lookup_struct_elt_type (value_type (arg1),
1604 &exp->elts[pc + 2].string,
1609 struct value *temp = arg1;
1610 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1615 tem = longest_to_int (exp->elts[pc + 1].longconst);
1616 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1617 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1618 if (noside == EVAL_SKIP)
1621 /* JYG: if print object is on we need to replace the base type
1622 with rtti type in order to continue on with successful
1623 lookup of member / method only available in the rtti type. */
1625 struct type *type = value_type (arg1);
1626 struct type *real_type;
1627 int full, top, using_enc;
1629 if (objectprint && TYPE_TARGET_TYPE(type) &&
1630 (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1632 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1635 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1636 real_type = lookup_pointer_type (real_type);
1638 real_type = lookup_reference_type (real_type);
1640 arg1 = value_cast (real_type, arg1);
1645 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1646 return value_zero (lookup_struct_elt_type (value_type (arg1),
1647 &exp->elts[pc + 2].string,
1652 struct value *temp = arg1;
1653 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1654 NULL, "structure pointer");
1657 case STRUCTOP_MEMBER:
1659 if (op == STRUCTOP_MEMBER)
1660 arg1 = evaluate_subexp_for_address (exp, pos, noside);
1662 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1664 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1666 if (noside == EVAL_SKIP)
1669 type = check_typedef (value_type (arg2));
1670 switch (TYPE_CODE (type))
1672 case TYPE_CODE_METHODPTR:
1673 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1674 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
1677 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
1678 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
1679 return value_ind (arg2);
1682 case TYPE_CODE_MEMBERPTR:
1683 /* Now, convert these values to an address. */
1684 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
1687 mem_offset = value_as_long (arg2);
1689 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
1690 value_as_long (arg1) + mem_offset);
1691 return value_ind (arg3);
1694 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1698 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1699 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1700 if (noside == EVAL_SKIP)
1702 if (binop_user_defined_p (op, arg1, arg2))
1703 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1705 return value_concat (arg1, arg2);
1708 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1709 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1711 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1713 if (binop_user_defined_p (op, arg1, arg2))
1714 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1716 return value_assign (arg1, arg2);
1718 case BINOP_ASSIGN_MODIFY:
1720 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1721 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1722 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1724 op = exp->elts[pc + 1].opcode;
1725 if (binop_user_defined_p (op, arg1, arg2))
1726 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
1727 else if (op == BINOP_ADD && ptrmath_type_p (value_type (arg1)))
1728 arg2 = value_ptradd (arg1, arg2);
1729 else if (op == BINOP_SUB && ptrmath_type_p (value_type (arg1)))
1730 arg2 = value_ptrsub (arg1, arg2);
1733 struct value *tmp = arg1;
1735 /* For shift and integer exponentiation operations,
1736 only promote the first argument. */
1737 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1738 && is_integral_type (value_type (arg2)))
1739 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
1741 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
1743 arg2 = value_binop (tmp, arg2, op);
1745 return value_assign (arg1, arg2);
1748 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1749 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1750 if (noside == EVAL_SKIP)
1752 if (binop_user_defined_p (op, arg1, arg2))
1753 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1754 else if (ptrmath_type_p (value_type (arg1)))
1755 return value_ptradd (arg1, arg2);
1756 else if (ptrmath_type_p (value_type (arg2)))
1757 return value_ptradd (arg2, arg1);
1760 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1761 return value_binop (arg1, arg2, BINOP_ADD);
1765 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1766 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1767 if (noside == EVAL_SKIP)
1769 if (binop_user_defined_p (op, arg1, arg2))
1770 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1771 else if (ptrmath_type_p (value_type (arg1)))
1773 if (ptrmath_type_p (value_type (arg2)))
1775 /* FIXME -- should be ptrdiff_t */
1776 type = builtin_type (exp->gdbarch)->builtin_long;
1777 return value_from_longest (type, value_ptrdiff (arg1, arg2));
1780 return value_ptrsub (arg1, arg2);
1784 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1785 return value_binop (arg1, arg2, BINOP_SUB);
1796 case BINOP_BITWISE_AND:
1797 case BINOP_BITWISE_IOR:
1798 case BINOP_BITWISE_XOR:
1799 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1800 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1801 if (noside == EVAL_SKIP)
1803 if (binop_user_defined_p (op, arg1, arg2))
1804 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1807 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1808 fudge arg2 to avoid division-by-zero, the caller is
1809 (theoretically) only looking for the type of the result. */
1810 if (noside == EVAL_AVOID_SIDE_EFFECTS
1811 /* ??? Do we really want to test for BINOP_MOD here?
1812 The implementation of value_binop gives it a well-defined
1815 || op == BINOP_INTDIV
1818 && value_logical_not (arg2))
1820 struct value *v_one, *retval;
1822 v_one = value_one (value_type (arg2), not_lval);
1823 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
1824 retval = value_binop (arg1, v_one, op);
1829 /* For shift and integer exponentiation operations,
1830 only promote the first argument. */
1831 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1832 && is_integral_type (value_type (arg2)))
1833 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
1835 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1837 return value_binop (arg1, arg2, op);
1842 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1843 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1844 if (noside == EVAL_SKIP)
1846 error (_("':' operator used in invalid context"));
1848 case BINOP_SUBSCRIPT:
1849 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1850 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1851 if (noside == EVAL_SKIP)
1853 if (binop_user_defined_p (op, arg1, arg2))
1854 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1857 /* If the user attempts to subscript something that is not an
1858 array or pointer type (like a plain int variable for example),
1859 then report this as an error. */
1861 arg1 = coerce_ref (arg1);
1862 type = check_typedef (value_type (arg1));
1863 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
1864 && TYPE_CODE (type) != TYPE_CODE_PTR)
1866 if (TYPE_NAME (type))
1867 error (_("cannot subscript something of type `%s'"),
1870 error (_("cannot subscript requested type"));
1873 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1874 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
1876 return value_subscript (arg1, arg2);
1880 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1881 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1882 if (noside == EVAL_SKIP)
1884 type = language_bool_type (exp->language_defn, exp->gdbarch);
1885 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
1887 case MULTI_SUBSCRIPT:
1889 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1890 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1893 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1894 /* FIXME: EVAL_SKIP handling may not be correct. */
1895 if (noside == EVAL_SKIP)
1906 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1907 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1909 /* If the user attempts to subscript something that has no target
1910 type (like a plain int variable for example), then report this
1913 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
1916 arg1 = value_zero (type, VALUE_LVAL (arg1));
1922 error (_("cannot subscript something of type `%s'"),
1923 TYPE_NAME (value_type (arg1)));
1927 if (binop_user_defined_p (op, arg1, arg2))
1929 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
1933 arg1 = coerce_ref (arg1);
1934 type = check_typedef (value_type (arg1));
1936 switch (TYPE_CODE (type))
1939 case TYPE_CODE_ARRAY:
1940 case TYPE_CODE_STRING:
1941 arg1 = value_subscript (arg1, arg2);
1944 case TYPE_CODE_BITSTRING:
1945 type = language_bool_type (exp->language_defn, exp->gdbarch);
1946 arg1 = value_bitstring_subscript (type, arg1, arg2);
1950 if (TYPE_NAME (type))
1951 error (_("cannot subscript something of type `%s'"),
1954 error (_("cannot subscript requested type"));
1960 multi_f77_subscript:
1962 int subscript_array[MAX_FORTRAN_DIMS];
1963 int array_size_array[MAX_FORTRAN_DIMS];
1964 int ndimensions = 1, i;
1965 struct type *tmp_type;
1966 int offset_item; /* The array offset where the item lives */
1968 if (nargs > MAX_FORTRAN_DIMS)
1969 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
1971 tmp_type = check_typedef (value_type (arg1));
1972 ndimensions = calc_f77_array_dims (type);
1974 if (nargs != ndimensions)
1975 error (_("Wrong number of subscripts"));
1977 /* Now that we know we have a legal array subscript expression
1978 let us actually find out where this element exists in the array. */
1981 /* Take array indices left to right */
1982 for (i = 0; i < nargs; i++)
1984 /* Evaluate each subscript, It must be a legal integer in F77 */
1985 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1987 /* Fill in the subscript and array size arrays */
1989 subscript_array[i] = value_as_long (arg2);
1992 /* Internal type of array is arranged right to left */
1993 for (i = 0; i < nargs; i++)
1995 retcode = f77_get_dynamic_upperbound (tmp_type, &upper);
1996 if (retcode == BOUND_FETCH_ERROR)
1997 error (_("Cannot obtain dynamic upper bound"));
1999 retcode = f77_get_dynamic_lowerbound (tmp_type, &lower);
2000 if (retcode == BOUND_FETCH_ERROR)
2001 error (_("Cannot obtain dynamic lower bound"));
2003 array_size_array[nargs - i - 1] = upper - lower + 1;
2005 /* Zero-normalize subscripts so that offsetting will work. */
2007 subscript_array[nargs - i - 1] -= lower;
2009 /* If we are at the bottom of a multidimensional
2010 array type then keep a ptr to the last ARRAY
2011 type around for use when calling value_subscript()
2012 below. This is done because we pretend to value_subscript
2013 that we actually have a one-dimensional array
2014 of base element type that we apply a simple
2018 tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
2021 /* Now let us calculate the offset for this item */
2023 offset_item = subscript_array[ndimensions - 1];
2025 for (i = ndimensions - 1; i > 0; --i)
2027 array_size_array[i - 1] * offset_item + subscript_array[i - 1];
2029 /* Construct a value node with the value of the offset */
2031 arg2 = value_from_longest (builtin_type_f_integer, offset_item);
2033 /* Let us now play a dirty trick: we will take arg1
2034 which is a value node pointing to the topmost level
2035 of the multidimensional array-set and pretend
2036 that it is actually a array of the final element
2037 type, this will ensure that value_subscript()
2038 returns the correct type value */
2040 deprecated_set_value_type (arg1, tmp_type);
2041 return value_subscripted_rvalue (arg1, arg2, 0);
2044 case BINOP_LOGICAL_AND:
2045 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2046 if (noside == EVAL_SKIP)
2048 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2053 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2056 if (binop_user_defined_p (op, arg1, arg2))
2058 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2059 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2063 tem = value_logical_not (arg1);
2064 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2065 (tem ? EVAL_SKIP : noside));
2066 type = language_bool_type (exp->language_defn, exp->gdbarch);
2067 return value_from_longest (type,
2068 (LONGEST) (!tem && !value_logical_not (arg2)));
2071 case BINOP_LOGICAL_OR:
2072 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2073 if (noside == EVAL_SKIP)
2075 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2080 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2083 if (binop_user_defined_p (op, arg1, arg2))
2085 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2086 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2090 tem = value_logical_not (arg1);
2091 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2092 (!tem ? EVAL_SKIP : noside));
2093 type = language_bool_type (exp->language_defn, exp->gdbarch);
2094 return value_from_longest (type,
2095 (LONGEST) (!tem || !value_logical_not (arg2)));
2099 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2100 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2101 if (noside == EVAL_SKIP)
2103 if (binop_user_defined_p (op, arg1, arg2))
2105 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2109 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2110 tem = value_equal (arg1, arg2);
2111 type = language_bool_type (exp->language_defn, exp->gdbarch);
2112 return value_from_longest (type, (LONGEST) tem);
2115 case BINOP_NOTEQUAL:
2116 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2117 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2118 if (noside == EVAL_SKIP)
2120 if (binop_user_defined_p (op, arg1, arg2))
2122 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2126 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2127 tem = value_equal (arg1, arg2);
2128 type = language_bool_type (exp->language_defn, exp->gdbarch);
2129 return value_from_longest (type, (LONGEST) ! tem);
2133 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2134 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2135 if (noside == EVAL_SKIP)
2137 if (binop_user_defined_p (op, arg1, arg2))
2139 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2143 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2144 tem = value_less (arg1, arg2);
2145 type = language_bool_type (exp->language_defn, exp->gdbarch);
2146 return value_from_longest (type, (LONGEST) tem);
2150 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2151 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2152 if (noside == EVAL_SKIP)
2154 if (binop_user_defined_p (op, arg1, arg2))
2156 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2160 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2161 tem = value_less (arg2, arg1);
2162 type = language_bool_type (exp->language_defn, exp->gdbarch);
2163 return value_from_longest (type, (LONGEST) tem);
2167 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2168 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2169 if (noside == EVAL_SKIP)
2171 if (binop_user_defined_p (op, arg1, arg2))
2173 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2177 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2178 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2179 type = language_bool_type (exp->language_defn, exp->gdbarch);
2180 return value_from_longest (type, (LONGEST) tem);
2184 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2185 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2186 if (noside == EVAL_SKIP)
2188 if (binop_user_defined_p (op, arg1, arg2))
2190 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2194 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2195 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2196 type = language_bool_type (exp->language_defn, exp->gdbarch);
2197 return value_from_longest (type, (LONGEST) tem);
2201 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2202 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2203 if (noside == EVAL_SKIP)
2205 type = check_typedef (value_type (arg2));
2206 if (TYPE_CODE (type) != TYPE_CODE_INT)
2207 error (_("Non-integral right operand for \"@\" operator."));
2208 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2210 return allocate_repeat_value (value_type (arg1),
2211 longest_to_int (value_as_long (arg2)));
2214 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2217 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2218 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2221 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2222 if (noside == EVAL_SKIP)
2224 if (unop_user_defined_p (op, arg1))
2225 return value_x_unop (arg1, op, noside);
2228 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2229 return value_pos (arg1);
2233 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2234 if (noside == EVAL_SKIP)
2236 if (unop_user_defined_p (op, arg1))
2237 return value_x_unop (arg1, op, noside);
2240 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2241 return value_neg (arg1);
2244 case UNOP_COMPLEMENT:
2245 /* C++: check for and handle destructor names. */
2246 op = exp->elts[*pos].opcode;
2248 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2249 if (noside == EVAL_SKIP)
2251 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2252 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2255 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2256 return value_complement (arg1);
2259 case UNOP_LOGICAL_NOT:
2260 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2261 if (noside == EVAL_SKIP)
2263 if (unop_user_defined_p (op, arg1))
2264 return value_x_unop (arg1, op, noside);
2267 type = language_bool_type (exp->language_defn, exp->gdbarch);
2268 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2272 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2273 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2274 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2275 type = check_typedef (value_type (arg1));
2276 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2277 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2278 error (_("Attempt to dereference pointer to member without an object"));
2279 if (noside == EVAL_SKIP)
2281 if (unop_user_defined_p (op, arg1))
2282 return value_x_unop (arg1, op, noside);
2283 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2285 type = check_typedef (value_type (arg1));
2286 if (TYPE_CODE (type) == TYPE_CODE_PTR
2287 || TYPE_CODE (type) == TYPE_CODE_REF
2288 /* In C you can dereference an array to get the 1st elt. */
2289 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2291 return value_zero (TYPE_TARGET_TYPE (type),
2293 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2294 /* GDB allows dereferencing an int. */
2295 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2298 error (_("Attempt to take contents of a non-pointer value."));
2301 /* Allow * on an integer so we can cast it to whatever we want.
2302 This returns an int, which seems like the most C-like thing to
2303 do. "long long" variables are rare enough that
2304 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2305 if (TYPE_CODE (type) == TYPE_CODE_INT)
2306 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2307 (CORE_ADDR) value_as_address (arg1));
2308 return value_ind (arg1);
2311 /* C++: check for and handle pointer to members. */
2313 op = exp->elts[*pos].opcode;
2315 if (noside == EVAL_SKIP)
2317 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2322 struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
2327 if (noside == EVAL_SKIP)
2329 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2332 return evaluate_subexp_for_sizeof (exp, pos);
2336 type = exp->elts[pc + 1].type;
2337 arg1 = evaluate_subexp (type, exp, pos, noside);
2338 if (noside == EVAL_SKIP)
2340 if (type != value_type (arg1))
2341 arg1 = value_cast (type, arg1);
2346 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2347 if (noside == EVAL_SKIP)
2349 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2350 return value_zero (exp->elts[pc + 1].type, lval_memory);
2352 return value_at_lazy (exp->elts[pc + 1].type,
2353 value_as_address (arg1));
2355 case UNOP_MEMVAL_TLS:
2357 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2358 if (noside == EVAL_SKIP)
2360 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2361 return value_zero (exp->elts[pc + 2].type, lval_memory);
2365 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2366 value_as_address (arg1));
2367 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2370 case UNOP_PREINCREMENT:
2371 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2372 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2374 else if (unop_user_defined_p (op, arg1))
2376 return value_x_unop (arg1, op, noside);
2380 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2381 if (ptrmath_type_p (value_type (arg1)))
2382 arg2 = value_ptradd (arg1, arg2);
2385 struct value *tmp = arg1;
2386 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2387 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2390 return value_assign (arg1, arg2);
2393 case UNOP_PREDECREMENT:
2394 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2395 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2397 else if (unop_user_defined_p (op, arg1))
2399 return value_x_unop (arg1, op, noside);
2403 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2404 if (ptrmath_type_p (value_type (arg1)))
2405 arg2 = value_ptrsub (arg1, arg2);
2408 struct value *tmp = arg1;
2409 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2410 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2413 return value_assign (arg1, arg2);
2416 case UNOP_POSTINCREMENT:
2417 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2418 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2420 else if (unop_user_defined_p (op, arg1))
2422 return value_x_unop (arg1, op, noside);
2426 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2427 if (ptrmath_type_p (value_type (arg1)))
2428 arg2 = value_ptradd (arg1, arg2);
2431 struct value *tmp = arg1;
2432 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2433 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2436 value_assign (arg1, arg2);
2440 case UNOP_POSTDECREMENT:
2441 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2442 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2444 else if (unop_user_defined_p (op, arg1))
2446 return value_x_unop (arg1, op, noside);
2450 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2451 if (ptrmath_type_p (value_type (arg1)))
2452 arg2 = value_ptrsub (arg1, arg2);
2455 struct value *tmp = arg1;
2456 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2457 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2460 value_assign (arg1, arg2);
2466 return value_of_this (1);
2470 return value_of_local ("self", 1);
2473 /* The value is not supposed to be used. This is here to make it
2474 easier to accommodate expressions that contain types. */
2476 if (noside == EVAL_SKIP)
2478 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2479 return allocate_value (exp->elts[pc + 1].type);
2481 error (_("Attempt to use a type name as an expression"));
2484 /* Removing this case and compiling with gcc -Wall reveals that
2485 a lot of cases are hitting this case. Some of these should
2486 probably be removed from expression.h; others are legitimate
2487 expressions which are (apparently) not fully implemented.
2489 If there are any cases landing here which mean a user error,
2490 then they should be separate cases, with more descriptive
2494 GDB does not (yet) know how to evaluate that kind of expression"));
2498 return value_from_longest (builtin_type_int8, (LONGEST) 1);
2501 /* Evaluate a subexpression of EXP, at index *POS,
2502 and return the address of that subexpression.
2503 Advance *POS over the subexpression.
2504 If the subexpression isn't an lvalue, get an error.
2505 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2506 then only the type of the result need be correct. */
2508 static struct value *
2509 evaluate_subexp_for_address (struct expression *exp, int *pos,
2519 op = exp->elts[pc].opcode;
2525 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2527 /* We can't optimize out "&*" if there's a user-defined operator*. */
2528 if (unop_user_defined_p (op, x))
2530 x = value_x_unop (x, op, noside);
2531 goto default_case_after_eval;
2538 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2539 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2542 var = exp->elts[pc + 2].symbol;
2544 /* C++: The "address" of a reference should yield the address
2545 * of the object pointed to. Let value_addr() deal with it. */
2546 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2550 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2553 lookup_pointer_type (SYMBOL_TYPE (var));
2554 enum address_class sym_class = SYMBOL_CLASS (var);
2556 if (sym_class == LOC_CONST
2557 || sym_class == LOC_CONST_BYTES
2558 || sym_class == LOC_REGISTER)
2559 error (_("Attempt to take address of register or constant."));
2562 value_zero (type, not_lval);
2564 else if (symbol_read_needs_frame (var))
2568 block_innermost_frame (exp->elts[pc + 1].block));
2570 return locate_var_value (var, NULL);
2573 tem = longest_to_int (exp->elts[pc + 2].longconst);
2574 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2575 x = value_aggregate_elt (exp->elts[pc + 1].type,
2576 &exp->elts[pc + 3].string,
2579 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2584 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2585 default_case_after_eval:
2586 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2588 struct type *type = check_typedef (value_type (x));
2590 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2591 return value_zero (lookup_pointer_type (value_type (x)),
2593 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2594 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2597 error (_("Attempt to take address of value not located in memory."));
2599 return value_addr (x);
2603 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2604 When used in contexts where arrays will be coerced anyway, this is
2605 equivalent to `evaluate_subexp' but much faster because it avoids
2606 actually fetching array contents (perhaps obsolete now that we have
2609 Note that we currently only do the coercion for C expressions, where
2610 arrays are zero based and the coercion is correct. For other languages,
2611 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2612 to decide if coercion is appropriate.
2617 evaluate_subexp_with_coercion (struct expression *exp,
2618 int *pos, enum noside noside)
2626 op = exp->elts[pc].opcode;
2631 var = exp->elts[pc + 2].symbol;
2632 if (TYPE_CODE (check_typedef (SYMBOL_TYPE (var))) == TYPE_CODE_ARRAY
2633 && CAST_IS_CONVERSION)
2638 (var, block_innermost_frame (exp->elts[pc + 1].block));
2639 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (check_typedef (SYMBOL_TYPE (var)))),
2645 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2649 /* Evaluate a subexpression of EXP, at index *POS,
2650 and return a value for the size of that subexpression.
2651 Advance *POS over the subexpression. */
2653 static struct value *
2654 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
2656 /* FIXME: This should be size_t. */
2657 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2664 op = exp->elts[pc].opcode;
2668 /* This case is handled specially
2669 so that we avoid creating a value for the result type.
2670 If the result type is very big, it's desirable not to
2671 create a value unnecessarily. */
2674 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2675 type = check_typedef (value_type (val));
2676 if (TYPE_CODE (type) != TYPE_CODE_PTR
2677 && TYPE_CODE (type) != TYPE_CODE_REF
2678 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
2679 error (_("Attempt to take contents of a non-pointer value."));
2680 type = check_typedef (TYPE_TARGET_TYPE (type));
2681 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2685 type = check_typedef (exp->elts[pc + 1].type);
2686 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2690 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
2692 value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2695 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2696 return value_from_longest (size_type,
2697 (LONGEST) TYPE_LENGTH (value_type (val)));
2701 /* Parse a type expression in the string [P..P+LENGTH). */
2704 parse_and_eval_type (char *p, int length)
2706 char *tmp = (char *) alloca (length + 4);
2707 struct expression *expr;
2709 memcpy (tmp + 1, p, length);
2710 tmp[length + 1] = ')';
2711 tmp[length + 2] = '0';
2712 tmp[length + 3] = '\0';
2713 expr = parse_expression (tmp);
2714 if (expr->elts[0].opcode != UNOP_CAST)
2715 error (_("Internal error in eval_type."));
2716 return expr->elts[1].type;
2720 calc_f77_array_dims (struct type *array_type)
2723 struct type *tmp_type;
2725 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
2726 error (_("Can't get dimensions for a non-array type"));
2728 tmp_type = array_type;
2730 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
2732 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)