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);
1003 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1004 if (noside == EVAL_SKIP)
1008 sel[len] = 0; /* Make sure it's terminated. */
1009 return value_from_longest (lookup_pointer_type (builtin_type_void),
1010 lookup_child_selector (sel));
1013 case OP_OBJC_MSGCALL:
1014 { /* Objective C message (method) call. */
1016 static CORE_ADDR responds_selector = 0;
1017 static CORE_ADDR method_selector = 0;
1019 CORE_ADDR selector = 0;
1021 int struct_return = 0;
1022 int sub_no_side = 0;
1024 static struct value *msg_send = NULL;
1025 static struct value *msg_send_stret = NULL;
1026 static int gnu_runtime = 0;
1028 struct value *target = NULL;
1029 struct value *method = NULL;
1030 struct value *called_method = NULL;
1032 struct type *selector_type = NULL;
1034 struct value *ret = NULL;
1037 selector = exp->elts[pc + 1].longconst;
1038 nargs = exp->elts[pc + 2].longconst;
1039 argvec = (struct value **) alloca (sizeof (struct value *)
1044 selector_type = lookup_pointer_type (builtin_type_void);
1045 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1046 sub_no_side = EVAL_NORMAL;
1048 sub_no_side = noside;
1050 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1052 if (value_as_long (target) == 0)
1053 return value_from_longest (builtin_type_long, 0);
1055 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1058 /* Find the method dispatch (Apple runtime) or method lookup
1059 (GNU runtime) function for Objective-C. These will be used
1060 to lookup the symbol information for the method. If we
1061 can't find any symbol information, then we'll use these to
1062 call the method, otherwise we can call the method
1063 directly. The msg_send_stret function is used in the special
1064 case of a method that returns a structure (Apple runtime
1069 type = lookup_pointer_type (builtin_type_void);
1070 type = lookup_function_type (type);
1071 type = lookup_pointer_type (type);
1072 type = lookup_function_type (type);
1073 type = lookup_pointer_type (type);
1075 msg_send = find_function_in_inferior ("objc_msg_lookup");
1076 msg_send_stret = find_function_in_inferior ("objc_msg_lookup");
1078 msg_send = value_from_pointer (type, value_as_address (msg_send));
1079 msg_send_stret = value_from_pointer (type,
1080 value_as_address (msg_send_stret));
1084 msg_send = find_function_in_inferior ("objc_msgSend");
1085 /* Special dispatcher for methods returning structs */
1086 msg_send_stret = find_function_in_inferior ("objc_msgSend_stret");
1089 /* Verify the target object responds to this method. The
1090 standard top-level 'Object' class uses a different name for
1091 the verification method than the non-standard, but more
1092 often used, 'NSObject' class. Make sure we check for both. */
1094 responds_selector = lookup_child_selector ("respondsToSelector:");
1095 if (responds_selector == 0)
1096 responds_selector = lookup_child_selector ("respondsTo:");
1098 if (responds_selector == 0)
1099 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1101 method_selector = lookup_child_selector ("methodForSelector:");
1102 if (method_selector == 0)
1103 method_selector = lookup_child_selector ("methodFor:");
1105 if (method_selector == 0)
1106 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1108 /* Call the verification method, to make sure that the target
1109 class implements the desired method. */
1111 argvec[0] = msg_send;
1113 argvec[2] = value_from_longest (builtin_type_long, responds_selector);
1114 argvec[3] = value_from_longest (builtin_type_long, selector);
1117 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1120 /* Function objc_msg_lookup returns a pointer. */
1122 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1124 if (value_as_long (ret) == 0)
1125 error (_("Target does not respond to this message selector."));
1127 /* Call "methodForSelector:" method, to get the address of a
1128 function method that implements this selector for this
1129 class. If we can find a symbol at that address, then we
1130 know the return type, parameter types etc. (that's a good
1133 argvec[0] = msg_send;
1135 argvec[2] = value_from_longest (builtin_type_long, method_selector);
1136 argvec[3] = value_from_longest (builtin_type_long, selector);
1139 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1143 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1146 /* ret should now be the selector. */
1148 addr = value_as_long (ret);
1151 struct symbol *sym = NULL;
1152 /* Is it a high_level symbol? */
1154 sym = find_pc_function (addr);
1156 method = value_of_variable (sym, 0);
1159 /* If we found a method with symbol information, check to see
1160 if it returns a struct. Otherwise assume it doesn't. */
1166 struct type *val_type;
1168 funaddr = find_function_addr (method, &val_type);
1170 b = block_for_pc (funaddr);
1172 CHECK_TYPEDEF (val_type);
1174 if ((val_type == NULL)
1175 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1177 if (expect_type != NULL)
1178 val_type = expect_type;
1181 struct_return = using_struct_return (value_type (method), val_type);
1183 else if (expect_type != NULL)
1185 struct_return = using_struct_return (NULL,
1186 check_typedef (expect_type));
1189 /* Found a function symbol. Now we will substitute its
1190 value in place of the message dispatcher (obj_msgSend),
1191 so that we call the method directly instead of thru
1192 the dispatcher. The main reason for doing this is that
1193 we can now evaluate the return value and parameter values
1194 according to their known data types, in case we need to
1195 do things like promotion, dereferencing, special handling
1196 of structs and doubles, etc.
1198 We want to use the type signature of 'method', but still
1199 jump to objc_msgSend() or objc_msgSend_stret() to better
1200 mimic the behavior of the runtime. */
1204 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1205 error (_("method address has symbol information with non-function type; skipping"));
1207 VALUE_ADDRESS (method) = value_as_address (msg_send_stret);
1209 VALUE_ADDRESS (method) = value_as_address (msg_send);
1210 called_method = method;
1215 called_method = msg_send_stret;
1217 called_method = msg_send;
1220 if (noside == EVAL_SKIP)
1223 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1225 /* If the return type doesn't look like a function type,
1226 call an error. This can happen if somebody tries to
1227 turn a variable into a function call. This is here
1228 because people often want to call, eg, strcmp, which
1229 gdb doesn't know is a function. If gdb isn't asked for
1230 it's opinion (ie. through "whatis"), it won't offer
1233 struct type *type = value_type (called_method);
1234 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1235 type = TYPE_TARGET_TYPE (type);
1236 type = TYPE_TARGET_TYPE (type);
1240 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1241 return allocate_value (expect_type);
1243 return allocate_value (type);
1246 error (_("Expression of type other than \"method returning ...\" used as a method"));
1249 /* Now depending on whether we found a symbol for the method,
1250 we will either call the runtime dispatcher or the method
1253 argvec[0] = called_method;
1255 argvec[2] = value_from_longest (builtin_type_long, selector);
1256 /* User-supplied arguments. */
1257 for (tem = 0; tem < nargs; tem++)
1258 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1259 argvec[tem + 3] = 0;
1261 if (gnu_runtime && (method != NULL))
1263 /* Function objc_msg_lookup returns a pointer. */
1264 deprecated_set_value_type (argvec[0],
1265 lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
1266 argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1269 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1276 op = exp->elts[*pos].opcode;
1277 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1278 /* Allocate arg vector, including space for the function to be
1279 called in argvec[0] and a terminating NULL */
1280 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
1281 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1284 /* First, evaluate the structure into arg2 */
1287 if (noside == EVAL_SKIP)
1290 if (op == STRUCTOP_MEMBER)
1292 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1296 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1299 /* If the function is a virtual function, then the
1300 aggregate value (providing the structure) plays
1301 its part by providing the vtable. Otherwise,
1302 it is just along for the ride: call the function
1305 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1307 if (TYPE_CODE (check_typedef (value_type (arg1)))
1308 != TYPE_CODE_METHODPTR)
1309 error (_("Non-pointer-to-member value used in pointer-to-member "
1312 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1314 struct type *method_type = check_typedef (value_type (arg1));
1315 arg1 = value_zero (method_type, not_lval);
1318 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1320 /* Now, say which argument to start evaluating from */
1323 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1325 /* Hair for method invocations */
1329 /* First, evaluate the structure into arg2 */
1331 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1332 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1333 if (noside == EVAL_SKIP)
1336 if (op == STRUCTOP_STRUCT)
1338 /* If v is a variable in a register, and the user types
1339 v.method (), this will produce an error, because v has
1342 A possible way around this would be to allocate a
1343 copy of the variable on the stack, copy in the
1344 contents, call the function, and copy out the
1345 contents. I.e. convert this from call by reference
1346 to call by copy-return (or whatever it's called).
1347 However, this does not work because it is not the
1348 same: the method being called could stash a copy of
1349 the address, and then future uses through that address
1350 (after the method returns) would be expected to
1351 use the variable itself, not some copy of it. */
1352 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1356 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1358 /* Now, say which argument to start evaluating from */
1363 /* Non-method function call */
1365 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1367 type = value_type (argvec[0]);
1368 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1369 type = TYPE_TARGET_TYPE (type);
1370 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1372 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1374 /* pai: FIXME This seems to be coercing arguments before
1375 * overload resolution has been done! */
1376 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
1382 /* Evaluate arguments */
1383 for (; tem <= nargs; tem++)
1385 /* Ensure that array expressions are coerced into pointer objects. */
1386 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1389 /* signal end of arglist */
1392 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1394 int static_memfuncp;
1397 /* Method invocation : stuff "this" as first parameter */
1399 /* Name of method from expression */
1400 strcpy (tstr, &exp->elts[pc2 + 2].string);
1402 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1404 /* Language is C++, do some overload resolution before evaluation */
1405 struct value *valp = NULL;
1407 /* Prepare list of argument types for overload resolution */
1408 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1409 for (ix = 1; ix <= nargs; ix++)
1410 arg_types[ix - 1] = value_type (argvec[ix]);
1412 (void) find_overload_match (arg_types, nargs, tstr,
1413 1 /* method */ , 0 /* strict match */ ,
1414 &arg2 /* the object */ , NULL,
1415 &valp, NULL, &static_memfuncp);
1418 argvec[1] = arg2; /* the ``this'' pointer */
1419 argvec[0] = valp; /* use the method found after overload resolution */
1422 /* Non-C++ case -- or no overload resolution */
1424 struct value *temp = arg2;
1425 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1427 op == STRUCTOP_STRUCT
1428 ? "structure" : "structure pointer");
1429 /* value_struct_elt updates temp with the correct value
1430 of the ``this'' pointer if necessary, so modify argvec[1] to
1431 reflect any ``this'' changes. */
1432 arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
1433 VALUE_ADDRESS (temp) + value_offset (temp)
1434 + value_embedded_offset (temp));
1435 argvec[1] = arg2; /* the ``this'' pointer */
1438 if (static_memfuncp)
1440 argvec[1] = argvec[0];
1445 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1450 else if (op == OP_VAR_VALUE)
1452 /* Non-member function being called */
1453 /* fn: This can only be done for C++ functions. A C-style function
1454 in a C++ program, for instance, does not have the fields that
1455 are expected here */
1457 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1459 /* Language is C++, do some overload resolution before evaluation */
1460 struct symbol *symp;
1462 /* Prepare list of argument types for overload resolution */
1463 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1464 for (ix = 1; ix <= nargs; ix++)
1465 arg_types[ix - 1] = value_type (argvec[ix]);
1467 (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
1468 0 /* not method */ , 0 /* strict match */ ,
1469 NULL, exp->elts[save_pos1+2].symbol /* the function */ ,
1472 /* Now fix the expression being evaluated */
1473 exp->elts[save_pos1+2].symbol = symp;
1474 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1478 /* Not C++, or no overload resolution allowed */
1479 /* nothing to be done; argvec already correctly set up */
1484 /* It is probably a C-style function */
1485 /* nothing to be done; argvec already correctly set up */
1490 if (noside == EVAL_SKIP)
1492 if (argvec[0] == NULL)
1493 error (_("Cannot evaluate function -- may be inlined"));
1494 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1496 /* If the return type doesn't look like a function type, call an
1497 error. This can happen if somebody tries to turn a variable into
1498 a function call. This is here because people often want to
1499 call, eg, strcmp, which gdb doesn't know is a function. If
1500 gdb isn't asked for it's opinion (ie. through "whatis"),
1501 it won't offer it. */
1503 struct type *ftype =
1504 TYPE_TARGET_TYPE (value_type (argvec[0]));
1507 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
1509 error (_("Expression of type other than \"Function returning ...\" used as function"));
1511 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1512 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1514 case OP_F77_UNDETERMINED_ARGLIST:
1516 /* Remember that in F77, functions, substring ops and
1517 array subscript operations cannot be disambiguated
1518 at parse time. We have made all array subscript operations,
1519 substring operations as well as function calls come here
1520 and we now have to discover what the heck this thing actually was.
1521 If it is a function, we process just as if we got an OP_FUNCALL. */
1523 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1526 /* First determine the type code we are dealing with. */
1527 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1528 type = check_typedef (value_type (arg1));
1529 code = TYPE_CODE (type);
1531 if (code == TYPE_CODE_PTR)
1533 /* Fortran always passes variable to subroutines as pointer.
1534 So we need to look into its target type to see if it is
1535 array, string or function. If it is, we need to switch
1536 to the target value the original one points to. */
1537 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1539 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1540 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1541 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1543 arg1 = value_ind (arg1);
1544 type = check_typedef (value_type (arg1));
1545 code = TYPE_CODE (type);
1551 case TYPE_CODE_ARRAY:
1552 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1553 return value_f90_subarray (arg1, exp, pos, noside);
1555 goto multi_f77_subscript;
1557 case TYPE_CODE_STRING:
1558 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1559 return value_f90_subarray (arg1, exp, pos, noside);
1562 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1563 return value_subscript (arg1, arg2);
1567 case TYPE_CODE_FUNC:
1568 /* It's a function call. */
1569 /* Allocate arg vector, including space for the function to be
1570 called in argvec[0] and a terminating NULL */
1571 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
1574 for (; tem <= nargs; tem++)
1575 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1576 argvec[tem] = 0; /* signal end of arglist */
1580 error (_("Cannot perform substring on this type"));
1584 /* We have a complex number, There should be 2 floating
1585 point numbers that compose it */
1587 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1588 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1590 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1592 case STRUCTOP_STRUCT:
1593 tem = longest_to_int (exp->elts[pc + 1].longconst);
1594 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1595 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1596 if (noside == EVAL_SKIP)
1598 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1599 return value_zero (lookup_struct_elt_type (value_type (arg1),
1600 &exp->elts[pc + 2].string,
1605 struct value *temp = arg1;
1606 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1611 tem = longest_to_int (exp->elts[pc + 1].longconst);
1612 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1613 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1614 if (noside == EVAL_SKIP)
1617 /* JYG: if print object is on we need to replace the base type
1618 with rtti type in order to continue on with successful
1619 lookup of member / method only available in the rtti type. */
1621 struct type *type = value_type (arg1);
1622 struct type *real_type;
1623 int full, top, using_enc;
1625 if (objectprint && TYPE_TARGET_TYPE(type) &&
1626 (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1628 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1631 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1632 real_type = lookup_pointer_type (real_type);
1634 real_type = lookup_reference_type (real_type);
1636 arg1 = value_cast (real_type, arg1);
1641 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1642 return value_zero (lookup_struct_elt_type (value_type (arg1),
1643 &exp->elts[pc + 2].string,
1648 struct value *temp = arg1;
1649 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1650 NULL, "structure pointer");
1653 case STRUCTOP_MEMBER:
1655 if (op == STRUCTOP_MEMBER)
1656 arg1 = evaluate_subexp_for_address (exp, pos, noside);
1658 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1660 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1662 if (noside == EVAL_SKIP)
1665 type = check_typedef (value_type (arg2));
1666 switch (TYPE_CODE (type))
1668 case TYPE_CODE_METHODPTR:
1669 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1670 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
1673 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
1674 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
1675 return value_ind (arg2);
1678 case TYPE_CODE_MEMBERPTR:
1679 /* Now, convert these values to an address. */
1680 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
1683 mem_offset = value_as_long (arg2);
1685 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
1686 value_as_long (arg1) + mem_offset);
1687 return value_ind (arg3);
1690 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1694 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1695 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1696 if (noside == EVAL_SKIP)
1698 if (binop_user_defined_p (op, arg1, arg2))
1699 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1701 return value_concat (arg1, arg2);
1704 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1705 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1707 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1709 if (binop_user_defined_p (op, arg1, arg2))
1710 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1712 return value_assign (arg1, arg2);
1714 case BINOP_ASSIGN_MODIFY:
1716 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1717 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1718 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1720 op = exp->elts[pc + 1].opcode;
1721 if (binop_user_defined_p (op, arg1, arg2))
1722 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
1723 else if (op == BINOP_ADD && ptrmath_type_p (value_type (arg1)))
1724 arg2 = value_ptradd (arg1, arg2);
1725 else if (op == BINOP_SUB && ptrmath_type_p (value_type (arg1)))
1726 arg2 = value_ptrsub (arg1, arg2);
1729 struct value *tmp = arg1;
1731 /* For shift and integer exponentiation operations,
1732 only promote the first argument. */
1733 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1734 && is_integral_type (value_type (arg2)))
1735 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
1737 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
1739 arg2 = value_binop (tmp, arg2, op);
1741 return value_assign (arg1, arg2);
1744 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1745 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1746 if (noside == EVAL_SKIP)
1748 if (binop_user_defined_p (op, arg1, arg2))
1749 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1750 else if (ptrmath_type_p (value_type (arg1)))
1751 return value_ptradd (arg1, arg2);
1752 else if (ptrmath_type_p (value_type (arg2)))
1753 return value_ptradd (arg2, arg1);
1756 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1757 return value_binop (arg1, arg2, BINOP_ADD);
1761 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1762 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1763 if (noside == EVAL_SKIP)
1765 if (binop_user_defined_p (op, arg1, arg2))
1766 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1767 else if (ptrmath_type_p (value_type (arg1)))
1769 if (ptrmath_type_p (value_type (arg2)))
1771 /* FIXME -- should be ptrdiff_t */
1772 type = builtin_type (exp->gdbarch)->builtin_long;
1773 return value_from_longest (type, value_ptrdiff (arg1, arg2));
1776 return value_ptrsub (arg1, arg2);
1780 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1781 return value_binop (arg1, arg2, BINOP_SUB);
1792 case BINOP_BITWISE_AND:
1793 case BINOP_BITWISE_IOR:
1794 case BINOP_BITWISE_XOR:
1795 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1796 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1797 if (noside == EVAL_SKIP)
1799 if (binop_user_defined_p (op, arg1, arg2))
1800 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1803 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1804 fudge arg2 to avoid division-by-zero, the caller is
1805 (theoretically) only looking for the type of the result. */
1806 if (noside == EVAL_AVOID_SIDE_EFFECTS
1807 /* ??? Do we really want to test for BINOP_MOD here?
1808 The implementation of value_binop gives it a well-defined
1811 || op == BINOP_INTDIV
1814 && value_logical_not (arg2))
1816 struct value *v_one, *retval;
1818 v_one = value_one (value_type (arg2), not_lval);
1819 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
1820 retval = value_binop (arg1, v_one, op);
1825 /* For shift and integer exponentiation operations,
1826 only promote the first argument. */
1827 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1828 && is_integral_type (value_type (arg2)))
1829 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
1831 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1833 return value_binop (arg1, arg2, op);
1838 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1839 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1840 if (noside == EVAL_SKIP)
1842 error (_("':' operator used in invalid context"));
1844 case BINOP_SUBSCRIPT:
1845 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1846 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1847 if (noside == EVAL_SKIP)
1849 if (binop_user_defined_p (op, arg1, arg2))
1850 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1853 /* If the user attempts to subscript something that is not an
1854 array or pointer type (like a plain int variable for example),
1855 then report this as an error. */
1857 arg1 = coerce_ref (arg1);
1858 type = check_typedef (value_type (arg1));
1859 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
1860 && TYPE_CODE (type) != TYPE_CODE_PTR)
1862 if (TYPE_NAME (type))
1863 error (_("cannot subscript something of type `%s'"),
1866 error (_("cannot subscript requested type"));
1869 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1870 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
1872 return value_subscript (arg1, arg2);
1876 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1877 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1878 if (noside == EVAL_SKIP)
1880 type = language_bool_type (exp->language_defn, exp->gdbarch);
1881 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
1883 case MULTI_SUBSCRIPT:
1885 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1886 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1889 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1890 /* FIXME: EVAL_SKIP handling may not be correct. */
1891 if (noside == EVAL_SKIP)
1902 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1903 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1905 /* If the user attempts to subscript something that has no target
1906 type (like a plain int variable for example), then report this
1909 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
1912 arg1 = value_zero (type, VALUE_LVAL (arg1));
1918 error (_("cannot subscript something of type `%s'"),
1919 TYPE_NAME (value_type (arg1)));
1923 if (binop_user_defined_p (op, arg1, arg2))
1925 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
1929 arg1 = coerce_ref (arg1);
1930 type = check_typedef (value_type (arg1));
1932 switch (TYPE_CODE (type))
1935 case TYPE_CODE_ARRAY:
1936 case TYPE_CODE_STRING:
1937 arg1 = value_subscript (arg1, arg2);
1940 case TYPE_CODE_BITSTRING:
1941 type = language_bool_type (exp->language_defn, exp->gdbarch);
1942 arg1 = value_bitstring_subscript (type, arg1, arg2);
1946 if (TYPE_NAME (type))
1947 error (_("cannot subscript something of type `%s'"),
1950 error (_("cannot subscript requested type"));
1956 multi_f77_subscript:
1958 int subscript_array[MAX_FORTRAN_DIMS];
1959 int array_size_array[MAX_FORTRAN_DIMS];
1960 int ndimensions = 1, i;
1961 struct type *tmp_type;
1962 int offset_item; /* The array offset where the item lives */
1964 if (nargs > MAX_FORTRAN_DIMS)
1965 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
1967 tmp_type = check_typedef (value_type (arg1));
1968 ndimensions = calc_f77_array_dims (type);
1970 if (nargs != ndimensions)
1971 error (_("Wrong number of subscripts"));
1973 /* Now that we know we have a legal array subscript expression
1974 let us actually find out where this element exists in the array. */
1977 /* Take array indices left to right */
1978 for (i = 0; i < nargs; i++)
1980 /* Evaluate each subscript, It must be a legal integer in F77 */
1981 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1983 /* Fill in the subscript and array size arrays */
1985 subscript_array[i] = value_as_long (arg2);
1988 /* Internal type of array is arranged right to left */
1989 for (i = 0; i < nargs; i++)
1991 retcode = f77_get_dynamic_upperbound (tmp_type, &upper);
1992 if (retcode == BOUND_FETCH_ERROR)
1993 error (_("Cannot obtain dynamic upper bound"));
1995 retcode = f77_get_dynamic_lowerbound (tmp_type, &lower);
1996 if (retcode == BOUND_FETCH_ERROR)
1997 error (_("Cannot obtain dynamic lower bound"));
1999 array_size_array[nargs - i - 1] = upper - lower + 1;
2001 /* Zero-normalize subscripts so that offsetting will work. */
2003 subscript_array[nargs - i - 1] -= lower;
2005 /* If we are at the bottom of a multidimensional
2006 array type then keep a ptr to the last ARRAY
2007 type around for use when calling value_subscript()
2008 below. This is done because we pretend to value_subscript
2009 that we actually have a one-dimensional array
2010 of base element type that we apply a simple
2014 tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
2017 /* Now let us calculate the offset for this item */
2019 offset_item = subscript_array[ndimensions - 1];
2021 for (i = ndimensions - 1; i > 0; --i)
2023 array_size_array[i - 1] * offset_item + subscript_array[i - 1];
2025 /* Construct a value node with the value of the offset */
2027 arg2 = value_from_longest (builtin_type_f_integer, offset_item);
2029 /* Let us now play a dirty trick: we will take arg1
2030 which is a value node pointing to the topmost level
2031 of the multidimensional array-set and pretend
2032 that it is actually a array of the final element
2033 type, this will ensure that value_subscript()
2034 returns the correct type value */
2036 deprecated_set_value_type (arg1, tmp_type);
2037 return value_subscripted_rvalue (arg1, arg2, 0);
2040 case BINOP_LOGICAL_AND:
2041 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2042 if (noside == EVAL_SKIP)
2044 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2049 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2052 if (binop_user_defined_p (op, arg1, arg2))
2054 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2055 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2059 tem = value_logical_not (arg1);
2060 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2061 (tem ? EVAL_SKIP : noside));
2062 type = language_bool_type (exp->language_defn, exp->gdbarch);
2063 return value_from_longest (type,
2064 (LONGEST) (!tem && !value_logical_not (arg2)));
2067 case BINOP_LOGICAL_OR:
2068 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2069 if (noside == EVAL_SKIP)
2071 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2076 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2079 if (binop_user_defined_p (op, arg1, arg2))
2081 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2082 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2086 tem = value_logical_not (arg1);
2087 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2088 (!tem ? EVAL_SKIP : noside));
2089 type = language_bool_type (exp->language_defn, exp->gdbarch);
2090 return value_from_longest (type,
2091 (LONGEST) (!tem || !value_logical_not (arg2)));
2095 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2096 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2097 if (noside == EVAL_SKIP)
2099 if (binop_user_defined_p (op, arg1, arg2))
2101 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2105 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2106 tem = value_equal (arg1, arg2);
2107 type = language_bool_type (exp->language_defn, exp->gdbarch);
2108 return value_from_longest (type, (LONGEST) tem);
2111 case BINOP_NOTEQUAL:
2112 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2113 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2114 if (noside == EVAL_SKIP)
2116 if (binop_user_defined_p (op, arg1, arg2))
2118 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2122 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2123 tem = value_equal (arg1, arg2);
2124 type = language_bool_type (exp->language_defn, exp->gdbarch);
2125 return value_from_longest (type, (LONGEST) ! tem);
2129 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2130 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2131 if (noside == EVAL_SKIP)
2133 if (binop_user_defined_p (op, arg1, arg2))
2135 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2139 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2140 tem = value_less (arg1, arg2);
2141 type = language_bool_type (exp->language_defn, exp->gdbarch);
2142 return value_from_longest (type, (LONGEST) tem);
2146 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2147 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2148 if (noside == EVAL_SKIP)
2150 if (binop_user_defined_p (op, arg1, arg2))
2152 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2156 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2157 tem = value_less (arg2, arg1);
2158 type = language_bool_type (exp->language_defn, exp->gdbarch);
2159 return value_from_longest (type, (LONGEST) tem);
2163 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2164 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2165 if (noside == EVAL_SKIP)
2167 if (binop_user_defined_p (op, arg1, arg2))
2169 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2173 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2174 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2175 type = language_bool_type (exp->language_defn, exp->gdbarch);
2176 return value_from_longest (type, (LONGEST) tem);
2180 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2181 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2182 if (noside == EVAL_SKIP)
2184 if (binop_user_defined_p (op, arg1, arg2))
2186 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2190 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2191 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2192 type = language_bool_type (exp->language_defn, exp->gdbarch);
2193 return value_from_longest (type, (LONGEST) tem);
2197 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2198 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2199 if (noside == EVAL_SKIP)
2201 type = check_typedef (value_type (arg2));
2202 if (TYPE_CODE (type) != TYPE_CODE_INT)
2203 error (_("Non-integral right operand for \"@\" operator."));
2204 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2206 return allocate_repeat_value (value_type (arg1),
2207 longest_to_int (value_as_long (arg2)));
2210 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2213 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2214 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2217 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2218 if (noside == EVAL_SKIP)
2220 if (unop_user_defined_p (op, arg1))
2221 return value_x_unop (arg1, op, noside);
2224 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2225 return value_pos (arg1);
2229 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2230 if (noside == EVAL_SKIP)
2232 if (unop_user_defined_p (op, arg1))
2233 return value_x_unop (arg1, op, noside);
2236 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2237 return value_neg (arg1);
2240 case UNOP_COMPLEMENT:
2241 /* C++: check for and handle destructor names. */
2242 op = exp->elts[*pos].opcode;
2244 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2245 if (noside == EVAL_SKIP)
2247 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2248 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2251 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2252 return value_complement (arg1);
2255 case UNOP_LOGICAL_NOT:
2256 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2257 if (noside == EVAL_SKIP)
2259 if (unop_user_defined_p (op, arg1))
2260 return value_x_unop (arg1, op, noside);
2263 type = language_bool_type (exp->language_defn, exp->gdbarch);
2264 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2268 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2269 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2270 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2271 type = check_typedef (value_type (arg1));
2272 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2273 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2274 error (_("Attempt to dereference pointer to member without an object"));
2275 if (noside == EVAL_SKIP)
2277 if (unop_user_defined_p (op, arg1))
2278 return value_x_unop (arg1, op, noside);
2279 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2281 type = check_typedef (value_type (arg1));
2282 if (TYPE_CODE (type) == TYPE_CODE_PTR
2283 || TYPE_CODE (type) == TYPE_CODE_REF
2284 /* In C you can dereference an array to get the 1st elt. */
2285 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2287 return value_zero (TYPE_TARGET_TYPE (type),
2289 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2290 /* GDB allows dereferencing an int. */
2291 return value_zero (builtin_type_int, lval_memory);
2293 error (_("Attempt to take contents of a non-pointer value."));
2295 return value_ind (arg1);
2298 /* C++: check for and handle pointer to members. */
2300 op = exp->elts[*pos].opcode;
2302 if (noside == EVAL_SKIP)
2304 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2309 struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
2314 if (noside == EVAL_SKIP)
2316 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2319 return evaluate_subexp_for_sizeof (exp, pos);
2323 type = exp->elts[pc + 1].type;
2324 arg1 = evaluate_subexp (type, exp, pos, noside);
2325 if (noside == EVAL_SKIP)
2327 if (type != value_type (arg1))
2328 arg1 = value_cast (type, arg1);
2333 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2334 if (noside == EVAL_SKIP)
2336 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2337 return value_zero (exp->elts[pc + 1].type, lval_memory);
2339 return value_at_lazy (exp->elts[pc + 1].type,
2340 value_as_address (arg1));
2342 case UNOP_MEMVAL_TLS:
2344 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2345 if (noside == EVAL_SKIP)
2347 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2348 return value_zero (exp->elts[pc + 2].type, lval_memory);
2352 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2353 value_as_address (arg1));
2354 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2357 case UNOP_PREINCREMENT:
2358 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2359 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2361 else if (unop_user_defined_p (op, arg1))
2363 return value_x_unop (arg1, op, noside);
2367 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2368 if (ptrmath_type_p (value_type (arg1)))
2369 arg2 = value_ptradd (arg1, arg2);
2372 struct value *tmp = arg1;
2373 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2374 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2377 return value_assign (arg1, arg2);
2380 case UNOP_PREDECREMENT:
2381 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2382 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2384 else if (unop_user_defined_p (op, arg1))
2386 return value_x_unop (arg1, op, noside);
2390 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2391 if (ptrmath_type_p (value_type (arg1)))
2392 arg2 = value_ptrsub (arg1, arg2);
2395 struct value *tmp = arg1;
2396 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2397 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2400 return value_assign (arg1, arg2);
2403 case UNOP_POSTINCREMENT:
2404 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2405 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2407 else if (unop_user_defined_p (op, arg1))
2409 return value_x_unop (arg1, op, noside);
2413 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2414 if (ptrmath_type_p (value_type (arg1)))
2415 arg2 = value_ptradd (arg1, arg2);
2418 struct value *tmp = arg1;
2419 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2420 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2423 value_assign (arg1, arg2);
2427 case UNOP_POSTDECREMENT:
2428 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2429 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2431 else if (unop_user_defined_p (op, arg1))
2433 return value_x_unop (arg1, op, noside);
2437 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2438 if (ptrmath_type_p (value_type (arg1)))
2439 arg2 = value_ptrsub (arg1, arg2);
2442 struct value *tmp = arg1;
2443 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2444 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2447 value_assign (arg1, arg2);
2453 return value_of_this (1);
2457 return value_of_local ("self", 1);
2460 /* The value is not supposed to be used. This is here to make it
2461 easier to accommodate expressions that contain types. */
2463 if (noside == EVAL_SKIP)
2465 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2466 return allocate_value (exp->elts[pc + 1].type);
2468 error (_("Attempt to use a type name as an expression"));
2471 /* Removing this case and compiling with gcc -Wall reveals that
2472 a lot of cases are hitting this case. Some of these should
2473 probably be removed from expression.h; others are legitimate
2474 expressions which are (apparently) not fully implemented.
2476 If there are any cases landing here which mean a user error,
2477 then they should be separate cases, with more descriptive
2481 GDB does not (yet) know how to evaluate that kind of expression"));
2485 return value_from_longest (builtin_type_int8, (LONGEST) 1);
2488 /* Evaluate a subexpression of EXP, at index *POS,
2489 and return the address of that subexpression.
2490 Advance *POS over the subexpression.
2491 If the subexpression isn't an lvalue, get an error.
2492 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2493 then only the type of the result need be correct. */
2495 static struct value *
2496 evaluate_subexp_for_address (struct expression *exp, int *pos,
2506 op = exp->elts[pc].opcode;
2512 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2514 /* We can't optimize out "&*" if there's a user-defined operator*. */
2515 if (unop_user_defined_p (op, x))
2517 x = value_x_unop (x, op, noside);
2518 goto default_case_after_eval;
2525 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2526 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2529 var = exp->elts[pc + 2].symbol;
2531 /* C++: The "address" of a reference should yield the address
2532 * of the object pointed to. Let value_addr() deal with it. */
2533 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2537 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2540 lookup_pointer_type (SYMBOL_TYPE (var));
2541 enum address_class sym_class = SYMBOL_CLASS (var);
2543 if (sym_class == LOC_CONST
2544 || sym_class == LOC_CONST_BYTES
2545 || sym_class == LOC_REGISTER)
2546 error (_("Attempt to take address of register or constant."));
2549 value_zero (type, not_lval);
2551 else if (symbol_read_needs_frame (var))
2555 block_innermost_frame (exp->elts[pc + 1].block));
2557 return locate_var_value (var, NULL);
2560 tem = longest_to_int (exp->elts[pc + 2].longconst);
2561 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2562 x = value_aggregate_elt (exp->elts[pc + 1].type,
2563 &exp->elts[pc + 3].string,
2566 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2571 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2572 default_case_after_eval:
2573 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2575 struct type *type = check_typedef (value_type (x));
2577 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2578 return value_zero (lookup_pointer_type (value_type (x)),
2580 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2581 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2584 error (_("Attempt to take address of value not located in memory."));
2586 return value_addr (x);
2590 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2591 When used in contexts where arrays will be coerced anyway, this is
2592 equivalent to `evaluate_subexp' but much faster because it avoids
2593 actually fetching array contents (perhaps obsolete now that we have
2596 Note that we currently only do the coercion for C expressions, where
2597 arrays are zero based and the coercion is correct. For other languages,
2598 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2599 to decide if coercion is appropriate.
2604 evaluate_subexp_with_coercion (struct expression *exp,
2605 int *pos, enum noside noside)
2613 op = exp->elts[pc].opcode;
2618 var = exp->elts[pc + 2].symbol;
2619 if (TYPE_CODE (check_typedef (SYMBOL_TYPE (var))) == TYPE_CODE_ARRAY
2620 && CAST_IS_CONVERSION)
2625 (var, block_innermost_frame (exp->elts[pc + 1].block));
2626 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (check_typedef (SYMBOL_TYPE (var)))),
2632 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2636 /* Evaluate a subexpression of EXP, at index *POS,
2637 and return a value for the size of that subexpression.
2638 Advance *POS over the subexpression. */
2640 static struct value *
2641 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
2643 /* FIXME: This should be size_t. */
2644 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2651 op = exp->elts[pc].opcode;
2655 /* This case is handled specially
2656 so that we avoid creating a value for the result type.
2657 If the result type is very big, it's desirable not to
2658 create a value unnecessarily. */
2661 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2662 type = check_typedef (value_type (val));
2663 if (TYPE_CODE (type) != TYPE_CODE_PTR
2664 && TYPE_CODE (type) != TYPE_CODE_REF
2665 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
2666 error (_("Attempt to take contents of a non-pointer value."));
2667 type = check_typedef (TYPE_TARGET_TYPE (type));
2668 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2672 type = check_typedef (exp->elts[pc + 1].type);
2673 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2677 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
2679 value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2682 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2683 return value_from_longest (size_type,
2684 (LONGEST) TYPE_LENGTH (value_type (val)));
2688 /* Parse a type expression in the string [P..P+LENGTH). */
2691 parse_and_eval_type (char *p, int length)
2693 char *tmp = (char *) alloca (length + 4);
2694 struct expression *expr;
2696 memcpy (tmp + 1, p, length);
2697 tmp[length + 1] = ')';
2698 tmp[length + 2] = '0';
2699 tmp[length + 3] = '\0';
2700 expr = parse_expression (tmp);
2701 if (expr->elts[0].opcode != UNOP_CAST)
2702 error (_("Internal error in eval_type."));
2703 return expr->elts[1].type;
2707 calc_f77_array_dims (struct type *array_type)
2710 struct type *tmp_type;
2712 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
2713 error (_("Can't get dimensions for a non-array type"));
2715 tmp_type = array_type;
2717 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
2719 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)