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 2009, 2010 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_obstack.h"
45 #include "python/python.h"
47 #include "gdb_assert.h"
51 /* This is defined in valops.c */
52 extern int overload_resolution;
54 /* Prototypes for local functions. */
56 static struct value *evaluate_subexp_for_sizeof (struct expression *, int *);
58 static struct value *evaluate_subexp_for_address (struct expression *,
61 static char *get_label (struct expression *, int *);
63 static struct value *evaluate_struct_tuple (struct value *,
64 struct expression *, int *,
67 static LONGEST init_array_element (struct value *, struct value *,
68 struct expression *, int *, enum noside,
72 evaluate_subexp (struct type *expect_type, struct expression *exp,
73 int *pos, enum noside noside)
75 return (*exp->language_defn->la_exp_desc->evaluate_exp)
76 (expect_type, exp, pos, noside);
79 /* Parse the string EXP as a C expression, evaluate it,
80 and return the result as a number. */
83 parse_and_eval_address (char *exp)
85 struct expression *expr = parse_expression (exp);
87 struct cleanup *old_chain =
88 make_cleanup (free_current_contents, &expr);
90 addr = value_as_address (evaluate_expression (expr));
91 do_cleanups (old_chain);
95 /* Like parse_and_eval_address but takes a pointer to a char * variable
96 and advanced that variable across the characters parsed. */
99 parse_and_eval_address_1 (char **expptr)
101 struct expression *expr = parse_exp_1 (expptr, (struct block *) 0, 0);
103 struct cleanup *old_chain =
104 make_cleanup (free_current_contents, &expr);
106 addr = value_as_address (evaluate_expression (expr));
107 do_cleanups (old_chain);
111 /* Like parse_and_eval_address, but treats the value of the expression
112 as an integer, not an address, returns a LONGEST, not a CORE_ADDR */
114 parse_and_eval_long (char *exp)
116 struct expression *expr = parse_expression (exp);
118 struct cleanup *old_chain =
119 make_cleanup (free_current_contents, &expr);
121 retval = value_as_long (evaluate_expression (expr));
122 do_cleanups (old_chain);
127 parse_and_eval (char *exp)
129 struct expression *expr = parse_expression (exp);
131 struct cleanup *old_chain =
132 make_cleanup (free_current_contents, &expr);
134 val = evaluate_expression (expr);
135 do_cleanups (old_chain);
139 /* Parse up to a comma (or to a closeparen)
140 in the string EXPP as an expression, evaluate it, and return the value.
141 EXPP is advanced to point to the comma. */
144 parse_to_comma_and_eval (char **expp)
146 struct expression *expr = parse_exp_1 (expp, (struct block *) 0, 1);
148 struct cleanup *old_chain =
149 make_cleanup (free_current_contents, &expr);
151 val = evaluate_expression (expr);
152 do_cleanups (old_chain);
156 /* Evaluate an expression in internal prefix form
157 such as is constructed by parse.y.
159 See expression.h for info on the format of an expression. */
162 evaluate_expression (struct expression *exp)
165 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
168 /* Evaluate an expression, avoiding all memory references
169 and getting a value whose type alone is correct. */
172 evaluate_type (struct expression *exp)
175 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
178 /* Evaluate a subexpression, avoiding all memory references and
179 getting a value whose type alone is correct. */
182 evaluate_subexpression_type (struct expression *exp, int subexp)
184 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
187 /* Extract a field operation from an expression. If the subexpression
188 of EXP starting at *SUBEXP is not a structure dereference
189 operation, return NULL. Otherwise, return the name of the
190 dereferenced field, and advance *SUBEXP to point to the
191 subexpression of the left-hand-side of the dereference. This is
192 used when completing field names. */
195 extract_field_op (struct expression *exp, int *subexp)
199 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
200 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
202 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
203 result = &exp->elts[*subexp + 2].string;
204 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
208 /* If the next expression is an OP_LABELED, skips past it,
209 returning the label. Otherwise, does nothing and returns NULL. */
212 get_label (struct expression *exp, int *pos)
214 if (exp->elts[*pos].opcode == OP_LABELED)
217 char *name = &exp->elts[pc + 2].string;
218 int tem = longest_to_int (exp->elts[pc + 1].longconst);
219 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
226 /* This function evaluates tuples (in (the deleted) Chill) or
227 brace-initializers (in C/C++) for structure types. */
229 static struct value *
230 evaluate_struct_tuple (struct value *struct_val,
231 struct expression *exp,
232 int *pos, enum noside noside, int nargs)
234 struct type *struct_type = check_typedef (value_type (struct_val));
235 struct type *substruct_type = struct_type;
236 struct type *field_type;
243 struct value *val = NULL;
248 /* Skip past the labels, and count them. */
249 while (get_label (exp, pos) != NULL)
254 char *label = get_label (exp, &pc);
257 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
260 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
261 if (field_name != NULL && strcmp (field_name, label) == 0)
264 subfieldno = fieldno;
265 substruct_type = struct_type;
269 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
272 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
273 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
274 if ((field_name == 0 || *field_name == '\0')
275 && TYPE_CODE (field_type) == TYPE_CODE_UNION)
278 for (; variantno < TYPE_NFIELDS (field_type);
282 = TYPE_FIELD_TYPE (field_type, variantno);
283 if (TYPE_CODE (substruct_type) == TYPE_CODE_STRUCT)
286 subfieldno < TYPE_NFIELDS (substruct_type);
289 if (strcmp(TYPE_FIELD_NAME (substruct_type,
300 error (_("there is no field named %s"), label);
306 /* Unlabelled tuple element - go to next field. */
310 if (subfieldno >= TYPE_NFIELDS (substruct_type))
313 substruct_type = struct_type;
319 /* Skip static fields. */
320 while (fieldno < TYPE_NFIELDS (struct_type)
321 && field_is_static (&TYPE_FIELD (struct_type,
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 (struct_type, addr,
360 value_as_long (val), 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);
418 static struct value *
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;
656 /* Constructs a fake method with the given parameter types.
657 This function is used by the parser to construct an "expected"
658 type for method overload resolution. */
661 make_params (int num_types, struct type **param_types)
663 struct type *type = XZALLOC (struct type);
664 TYPE_MAIN_TYPE (type) = XZALLOC (struct main_type);
665 TYPE_LENGTH (type) = 1;
666 TYPE_CODE (type) = TYPE_CODE_METHOD;
667 TYPE_VPTR_FIELDNO (type) = -1;
668 TYPE_CHAIN (type) = type;
669 TYPE_NFIELDS (type) = num_types;
670 TYPE_FIELDS (type) = (struct field *)
671 TYPE_ZALLOC (type, sizeof (struct field) * num_types);
673 while (num_types-- > 0)
674 TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
680 evaluate_subexp_standard (struct type *expect_type,
681 struct expression *exp, int *pos,
686 int pc, pc2 = 0, oldpos;
687 struct value *arg1 = NULL;
688 struct value *arg2 = NULL;
692 struct value **argvec;
697 struct type **arg_types;
699 struct symbol *function = NULL;
700 char *function_name = NULL;
703 op = exp->elts[pc].opcode;
708 tem = longest_to_int (exp->elts[pc + 2].longconst);
709 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
710 if (noside == EVAL_SKIP)
712 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
713 &exp->elts[pc + 3].string,
714 expect_type, 0, noside);
716 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
721 return value_from_longest (exp->elts[pc + 1].type,
722 exp->elts[pc + 2].longconst);
726 return value_from_double (exp->elts[pc + 1].type,
727 exp->elts[pc + 2].doubleconst);
731 return value_from_decfloat (exp->elts[pc + 1].type,
732 exp->elts[pc + 2].decfloatconst);
736 if (noside == EVAL_SKIP)
739 /* JYG: We used to just return value_zero of the symbol type
740 if we're asked to avoid side effects. Otherwise we return
741 value_of_variable (...). However I'm not sure if
742 value_of_variable () has any side effect.
743 We need a full value object returned here for whatis_exp ()
744 to call evaluate_type () and then pass the full value to
745 value_rtti_target_type () if we are dealing with a pointer
746 or reference to a base class and print object is on. */
749 volatile struct gdb_exception except;
750 struct value *ret = NULL;
752 TRY_CATCH (except, RETURN_MASK_ERROR)
754 ret = value_of_variable (exp->elts[pc + 2].symbol,
755 exp->elts[pc + 1].block);
758 if (except.reason < 0)
760 if (noside == EVAL_AVOID_SIDE_EFFECTS)
761 ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol), not_lval);
763 throw_exception (except);
772 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
776 const char *name = &exp->elts[pc + 2].string;
780 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
781 regno = user_reg_map_name_to_regnum (exp->gdbarch,
782 name, strlen (name));
784 error (_("Register $%s not available."), name);
786 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
787 a value with the appropriate register type. Unfortunately,
788 we don't have easy access to the type of user registers.
789 So for these registers, we fetch the register value regardless
790 of the evaluation mode. */
791 if (noside == EVAL_AVOID_SIDE_EFFECTS
792 && regno < gdbarch_num_regs (exp->gdbarch)
793 + gdbarch_num_pseudo_regs (exp->gdbarch))
794 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
796 val = value_of_register (regno, get_selected_frame (NULL));
798 error (_("Value of register %s not available."), name);
804 type = language_bool_type (exp->language_defn, exp->gdbarch);
805 return value_from_longest (type, exp->elts[pc + 1].longconst);
809 return value_of_internalvar (exp->gdbarch,
810 exp->elts[pc + 1].internalvar);
813 tem = longest_to_int (exp->elts[pc + 1].longconst);
814 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
815 if (noside == EVAL_SKIP)
817 type = language_string_char_type (exp->language_defn, exp->gdbarch);
818 return value_string (&exp->elts[pc + 2].string, tem, type);
820 case OP_OBJC_NSSTRING: /* Objective C Foundation Class NSString constant. */
821 tem = longest_to_int (exp->elts[pc + 1].longconst);
822 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
823 if (noside == EVAL_SKIP)
827 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
830 tem = longest_to_int (exp->elts[pc + 1].longconst);
832 += 3 + BYTES_TO_EXP_ELEM ((tem + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
833 if (noside == EVAL_SKIP)
835 return value_bitstring (&exp->elts[pc + 2].string, tem,
836 builtin_type (exp->gdbarch)->builtin_int);
841 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
842 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
843 nargs = tem3 - tem2 + 1;
844 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
846 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
847 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
849 struct value *rec = allocate_value (expect_type);
850 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
851 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
854 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
855 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
857 struct type *range_type = TYPE_INDEX_TYPE (type);
858 struct type *element_type = TYPE_TARGET_TYPE (type);
859 struct value *array = allocate_value (expect_type);
860 int element_size = TYPE_LENGTH (check_typedef (element_type));
861 LONGEST low_bound, high_bound, index;
862 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
865 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
868 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
869 for (tem = nargs; --nargs >= 0;)
871 struct value *element;
873 if (exp->elts[*pos].opcode == BINOP_RANGE)
876 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
878 element = evaluate_subexp (element_type, exp, pos, noside);
879 if (value_type (element) != element_type)
880 element = value_cast (element_type, element);
883 int continue_pc = *pos;
885 index = init_array_element (array, element, exp, pos, noside,
886 low_bound, high_bound);
891 if (index > high_bound)
892 /* to avoid memory corruption */
893 error (_("Too many array elements"));
894 memcpy (value_contents_raw (array)
895 + (index - low_bound) * element_size,
896 value_contents (element),
904 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
905 && TYPE_CODE (type) == TYPE_CODE_SET)
907 struct value *set = allocate_value (expect_type);
908 gdb_byte *valaddr = value_contents_raw (set);
909 struct type *element_type = TYPE_INDEX_TYPE (type);
910 struct type *check_type = element_type;
911 LONGEST low_bound, high_bound;
913 /* get targettype of elementtype */
914 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
915 || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
916 check_type = TYPE_TARGET_TYPE (check_type);
918 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
919 error (_("(power)set type with unknown size"));
920 memset (valaddr, '\0', TYPE_LENGTH (type));
921 for (tem = 0; tem < nargs; tem++)
923 LONGEST range_low, range_high;
924 struct type *range_low_type, *range_high_type;
925 struct value *elem_val;
926 if (exp->elts[*pos].opcode == BINOP_RANGE)
929 elem_val = evaluate_subexp (element_type, exp, pos, noside);
930 range_low_type = value_type (elem_val);
931 range_low = value_as_long (elem_val);
932 elem_val = evaluate_subexp (element_type, exp, pos, noside);
933 range_high_type = value_type (elem_val);
934 range_high = value_as_long (elem_val);
938 elem_val = evaluate_subexp (element_type, exp, pos, noside);
939 range_low_type = range_high_type = value_type (elem_val);
940 range_low = range_high = value_as_long (elem_val);
942 /* check types of elements to avoid mixture of elements from
943 different types. Also check if type of element is "compatible"
944 with element type of powerset */
945 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
946 range_low_type = TYPE_TARGET_TYPE (range_low_type);
947 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
948 range_high_type = TYPE_TARGET_TYPE (range_high_type);
949 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
950 || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
951 && (range_low_type != range_high_type)))
952 /* different element modes */
953 error (_("POWERSET tuple elements of different mode"));
954 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
955 || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
956 && range_low_type != check_type))
957 error (_("incompatible POWERSET tuple elements"));
958 if (range_low > range_high)
960 warning (_("empty POWERSET tuple range"));
963 if (range_low < low_bound || range_high > high_bound)
964 error (_("POWERSET tuple element out of range"));
965 range_low -= low_bound;
966 range_high -= low_bound;
967 for (; range_low <= range_high; range_low++)
969 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
970 if (gdbarch_bits_big_endian (exp->gdbarch))
971 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
972 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
979 argvec = (struct value **) alloca (sizeof (struct value *) * nargs);
980 for (tem = 0; tem < nargs; tem++)
982 /* Ensure that array expressions are coerced into pointer objects. */
983 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
985 if (noside == EVAL_SKIP)
987 return value_array (tem2, tem3, argvec);
991 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
993 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
995 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
996 if (noside == EVAL_SKIP)
998 return value_slice (array, lowbound, upper - lowbound + 1);
1001 case TERNOP_SLICE_COUNT:
1003 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1005 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1007 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1008 return value_slice (array, lowbound, length);
1012 /* Skip third and second args to evaluate the first one. */
1013 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1014 if (value_logical_not (arg1))
1016 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1017 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1021 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1022 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1026 case OP_OBJC_SELECTOR:
1027 { /* Objective C @selector operator. */
1028 char *sel = &exp->elts[pc + 2].string;
1029 int len = longest_to_int (exp->elts[pc + 1].longconst);
1030 struct type *selector_type;
1032 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1033 if (noside == EVAL_SKIP)
1037 sel[len] = 0; /* Make sure it's terminated. */
1039 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1040 return value_from_longest (selector_type,
1041 lookup_child_selector (exp->gdbarch, sel));
1044 case OP_OBJC_MSGCALL:
1045 { /* Objective C message (method) call. */
1047 CORE_ADDR responds_selector = 0;
1048 CORE_ADDR method_selector = 0;
1050 CORE_ADDR selector = 0;
1052 int struct_return = 0;
1053 int sub_no_side = 0;
1055 struct value *msg_send = NULL;
1056 struct value *msg_send_stret = NULL;
1057 int gnu_runtime = 0;
1059 struct value *target = NULL;
1060 struct value *method = NULL;
1061 struct value *called_method = NULL;
1063 struct type *selector_type = NULL;
1064 struct type *long_type;
1066 struct value *ret = NULL;
1069 selector = exp->elts[pc + 1].longconst;
1070 nargs = exp->elts[pc + 2].longconst;
1071 argvec = (struct value **) alloca (sizeof (struct value *)
1076 long_type = builtin_type (exp->gdbarch)->builtin_long;
1077 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1079 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1080 sub_no_side = EVAL_NORMAL;
1082 sub_no_side = noside;
1084 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1086 if (value_as_long (target) == 0)
1087 return value_from_longest (long_type, 0);
1089 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1092 /* Find the method dispatch (Apple runtime) or method lookup
1093 (GNU runtime) function for Objective-C. These will be used
1094 to lookup the symbol information for the method. If we
1095 can't find any symbol information, then we'll use these to
1096 call the method, otherwise we can call the method
1097 directly. The msg_send_stret function is used in the special
1098 case of a method that returns a structure (Apple runtime
1102 struct type *type = selector_type;
1103 type = lookup_function_type (type);
1104 type = lookup_pointer_type (type);
1105 type = lookup_function_type (type);
1106 type = lookup_pointer_type (type);
1108 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1110 = find_function_in_inferior ("objc_msg_lookup", NULL);
1112 msg_send = value_from_pointer (type, value_as_address (msg_send));
1113 msg_send_stret = value_from_pointer (type,
1114 value_as_address (msg_send_stret));
1118 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1119 /* Special dispatcher for methods returning structs */
1121 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1124 /* Verify the target object responds to this method. The
1125 standard top-level 'Object' class uses a different name for
1126 the verification method than the non-standard, but more
1127 often used, 'NSObject' class. Make sure we check for both. */
1130 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1131 if (responds_selector == 0)
1133 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1135 if (responds_selector == 0)
1136 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1139 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1140 if (method_selector == 0)
1142 = lookup_child_selector (exp->gdbarch, "methodFor:");
1144 if (method_selector == 0)
1145 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1147 /* Call the verification method, to make sure that the target
1148 class implements the desired method. */
1150 argvec[0] = msg_send;
1152 argvec[2] = value_from_longest (long_type, responds_selector);
1153 argvec[3] = value_from_longest (long_type, selector);
1156 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1159 /* Function objc_msg_lookup returns a pointer. */
1161 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1163 if (value_as_long (ret) == 0)
1164 error (_("Target does not respond to this message selector."));
1166 /* Call "methodForSelector:" method, to get the address of a
1167 function method that implements this selector for this
1168 class. If we can find a symbol at that address, then we
1169 know the return type, parameter types etc. (that's a good
1172 argvec[0] = msg_send;
1174 argvec[2] = value_from_longest (long_type, method_selector);
1175 argvec[3] = value_from_longest (long_type, selector);
1178 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1182 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1185 /* ret should now be the selector. */
1187 addr = value_as_long (ret);
1190 struct symbol *sym = NULL;
1192 /* The address might point to a function descriptor;
1193 resolve it to the actual code address instead. */
1194 addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
1197 /* Is it a high_level symbol? */
1198 sym = find_pc_function (addr);
1200 method = value_of_variable (sym, 0);
1203 /* If we found a method with symbol information, check to see
1204 if it returns a struct. Otherwise assume it doesn't. */
1210 struct type *val_type;
1212 funaddr = find_function_addr (method, &val_type);
1214 b = block_for_pc (funaddr);
1216 CHECK_TYPEDEF (val_type);
1218 if ((val_type == NULL)
1219 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1221 if (expect_type != NULL)
1222 val_type = expect_type;
1225 struct_return = using_struct_return (exp->gdbarch,
1226 value_type (method), val_type);
1228 else if (expect_type != NULL)
1230 struct_return = using_struct_return (exp->gdbarch, NULL,
1231 check_typedef (expect_type));
1234 /* Found a function symbol. Now we will substitute its
1235 value in place of the message dispatcher (obj_msgSend),
1236 so that we call the method directly instead of thru
1237 the dispatcher. The main reason for doing this is that
1238 we can now evaluate the return value and parameter values
1239 according to their known data types, in case we need to
1240 do things like promotion, dereferencing, special handling
1241 of structs and doubles, etc.
1243 We want to use the type signature of 'method', but still
1244 jump to objc_msgSend() or objc_msgSend_stret() to better
1245 mimic the behavior of the runtime. */
1249 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1250 error (_("method address has symbol information with non-function type; skipping"));
1252 /* Create a function pointer of the appropriate type, and replace
1253 its value with the value of msg_send or msg_send_stret. We must
1254 use a pointer here, as msg_send and msg_send_stret are of pointer
1255 type, and the representation may be different on systems that use
1256 function descriptors. */
1259 = value_from_pointer (lookup_pointer_type (value_type (method)),
1260 value_as_address (msg_send_stret));
1263 = value_from_pointer (lookup_pointer_type (value_type (method)),
1264 value_as_address (msg_send));
1269 called_method = msg_send_stret;
1271 called_method = msg_send;
1274 if (noside == EVAL_SKIP)
1277 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1279 /* If the return type doesn't look like a function type,
1280 call an error. This can happen if somebody tries to
1281 turn a variable into a function call. This is here
1282 because people often want to call, eg, strcmp, which
1283 gdb doesn't know is a function. If gdb isn't asked for
1284 it's opinion (ie. through "whatis"), it won't offer
1287 struct type *type = value_type (called_method);
1288 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1289 type = TYPE_TARGET_TYPE (type);
1290 type = TYPE_TARGET_TYPE (type);
1294 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1295 return allocate_value (expect_type);
1297 return allocate_value (type);
1300 error (_("Expression of type other than \"method returning ...\" used as a method"));
1303 /* Now depending on whether we found a symbol for the method,
1304 we will either call the runtime dispatcher or the method
1307 argvec[0] = called_method;
1309 argvec[2] = value_from_longest (long_type, selector);
1310 /* User-supplied arguments. */
1311 for (tem = 0; tem < nargs; tem++)
1312 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1313 argvec[tem + 3] = 0;
1315 if (gnu_runtime && (method != NULL))
1317 /* Function objc_msg_lookup returns a pointer. */
1318 deprecated_set_value_type (argvec[0],
1319 lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
1320 argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1323 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1330 op = exp->elts[*pos].opcode;
1331 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1332 /* Allocate arg vector, including space for the function to be
1333 called in argvec[0] and a terminating NULL */
1334 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
1335 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1338 /* First, evaluate the structure into arg2 */
1341 if (noside == EVAL_SKIP)
1344 if (op == STRUCTOP_MEMBER)
1346 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1350 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1353 /* If the function is a virtual function, then the
1354 aggregate value (providing the structure) plays
1355 its part by providing the vtable. Otherwise,
1356 it is just along for the ride: call the function
1359 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1361 if (TYPE_CODE (check_typedef (value_type (arg1)))
1362 != TYPE_CODE_METHODPTR)
1363 error (_("Non-pointer-to-member value used in pointer-to-member "
1366 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1368 struct type *method_type = check_typedef (value_type (arg1));
1369 arg1 = value_zero (method_type, not_lval);
1372 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1374 /* Now, say which argument to start evaluating from */
1377 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1379 /* Hair for method invocations */
1383 /* First, evaluate the structure into arg2 */
1385 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1386 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1387 if (noside == EVAL_SKIP)
1390 if (op == STRUCTOP_STRUCT)
1392 /* If v is a variable in a register, and the user types
1393 v.method (), this will produce an error, because v has
1396 A possible way around this would be to allocate a
1397 copy of the variable on the stack, copy in the
1398 contents, call the function, and copy out the
1399 contents. I.e. convert this from call by reference
1400 to call by copy-return (or whatever it's called).
1401 However, this does not work because it is not the
1402 same: the method being called could stash a copy of
1403 the address, and then future uses through that address
1404 (after the method returns) would be expected to
1405 use the variable itself, not some copy of it. */
1406 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1410 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1412 /* Now, say which argument to start evaluating from */
1415 else if (op == OP_SCOPE
1416 && overload_resolution
1417 && (exp->language_defn->la_language == language_cplus))
1419 /* Unpack it locally so we can properly handle overload
1425 local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
1426 (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
1427 type = exp->elts[pc2 + 1].type;
1428 name = &exp->elts[pc2 + 3].string;
1431 function_name = NULL;
1432 if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
1434 function = cp_lookup_symbol_namespace (TYPE_TAG_NAME (type),
1436 get_selected_block (0),
1438 if (function == NULL)
1439 error (_("No symbol \"%s\" in namespace \"%s\"."),
1440 name, TYPE_TAG_NAME (type));
1446 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1447 || TYPE_CODE (type) == TYPE_CODE_UNION);
1448 function_name = name;
1450 arg2 = value_zero (type, lval_memory);
1457 /* Non-method function call */
1459 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1461 type = value_type (argvec[0]);
1462 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1463 type = TYPE_TARGET_TYPE (type);
1464 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1466 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1468 /* pai: FIXME This seems to be coercing arguments before
1469 * overload resolution has been done! */
1470 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
1476 /* Evaluate arguments */
1477 for (; tem <= nargs; tem++)
1479 /* Ensure that array expressions are coerced into pointer objects. */
1480 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1483 /* signal end of arglist */
1486 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
1487 || (op == OP_SCOPE && function_name != NULL))
1489 int static_memfuncp;
1492 /* Method invocation : stuff "this" as first parameter */
1497 /* Name of method from expression */
1498 tstr = &exp->elts[pc2 + 2].string;
1501 tstr = function_name;
1503 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1505 /* Language is C++, do some overload resolution before evaluation */
1506 struct value *valp = NULL;
1508 /* Prepare list of argument types for overload resolution */
1509 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1510 for (ix = 1; ix <= nargs; ix++)
1511 arg_types[ix - 1] = value_type (argvec[ix]);
1513 (void) find_overload_match (arg_types, nargs, tstr,
1514 1 /* method */ , 0 /* strict match */ ,
1515 &arg2 /* the object */ , NULL,
1516 &valp, NULL, &static_memfuncp);
1518 if (op == OP_SCOPE && !static_memfuncp)
1520 /* For the time being, we don't handle this. */
1521 error (_("Call to overloaded function %s requires "
1525 argvec[1] = arg2; /* the ``this'' pointer */
1526 argvec[0] = valp; /* use the method found after overload resolution */
1529 /* Non-C++ case -- or no overload resolution */
1531 struct value *temp = arg2;
1532 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1534 op == STRUCTOP_STRUCT
1535 ? "structure" : "structure pointer");
1536 /* value_struct_elt updates temp with the correct value
1537 of the ``this'' pointer if necessary, so modify argvec[1] to
1538 reflect any ``this'' changes. */
1539 arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
1540 value_address (temp)
1541 + value_embedded_offset (temp));
1542 argvec[1] = arg2; /* the ``this'' pointer */
1545 if (static_memfuncp)
1547 argvec[1] = argvec[0];
1552 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1557 else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
1559 /* Non-member function being called */
1560 /* fn: This can only be done for C++ functions. A C-style function
1561 in a C++ program, for instance, does not have the fields that
1562 are expected here */
1564 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1566 /* Language is C++, do some overload resolution before evaluation */
1567 struct symbol *symp;
1569 if (op == OP_VAR_VALUE)
1570 function = exp->elts[save_pos1+2].symbol;
1572 /* Prepare list of argument types for overload resolution */
1573 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1574 for (ix = 1; ix <= nargs; ix++)
1575 arg_types[ix - 1] = value_type (argvec[ix]);
1577 (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
1578 0 /* not method */ , 0 /* strict match */ ,
1579 NULL, function /* the function */ ,
1582 if (op == OP_VAR_VALUE)
1584 /* Now fix the expression being evaluated */
1585 exp->elts[save_pos1+2].symbol = symp;
1586 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
1590 argvec[0] = value_of_variable (symp, get_selected_block (0));
1594 /* Not C++, or no overload resolution allowed */
1595 /* nothing to be done; argvec already correctly set up */
1600 /* It is probably a C-style function */
1601 /* nothing to be done; argvec already correctly set up */
1606 if (noside == EVAL_SKIP)
1608 if (argvec[0] == NULL)
1609 error (_("Cannot evaluate function -- may be inlined"));
1610 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1612 /* If the return type doesn't look like a function type, call an
1613 error. This can happen if somebody tries to turn a variable into
1614 a function call. This is here because people often want to
1615 call, eg, strcmp, which gdb doesn't know is a function. If
1616 gdb isn't asked for it's opinion (ie. through "whatis"),
1617 it won't offer it. */
1619 struct type *ftype = value_type (argvec[0]);
1621 if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
1623 /* We don't know anything about what the internal
1624 function might return, but we have to return
1626 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
1629 else if (TYPE_TARGET_TYPE (ftype))
1630 return allocate_value (TYPE_TARGET_TYPE (ftype));
1632 error (_("Expression of type other than \"Function returning ...\" used as function"));
1634 if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_INTERNAL_FUNCTION)
1635 return call_internal_function (exp->gdbarch, exp->language_defn,
1636 argvec[0], nargs, argvec + 1);
1638 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1639 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1641 case OP_F77_UNDETERMINED_ARGLIST:
1643 /* Remember that in F77, functions, substring ops and
1644 array subscript operations cannot be disambiguated
1645 at parse time. We have made all array subscript operations,
1646 substring operations as well as function calls come here
1647 and we now have to discover what the heck this thing actually was.
1648 If it is a function, we process just as if we got an OP_FUNCALL. */
1650 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1653 /* First determine the type code we are dealing with. */
1654 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1655 type = check_typedef (value_type (arg1));
1656 code = TYPE_CODE (type);
1658 if (code == TYPE_CODE_PTR)
1660 /* Fortran always passes variable to subroutines as pointer.
1661 So we need to look into its target type to see if it is
1662 array, string or function. If it is, we need to switch
1663 to the target value the original one points to. */
1664 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1666 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1667 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1668 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1670 arg1 = value_ind (arg1);
1671 type = check_typedef (value_type (arg1));
1672 code = TYPE_CODE (type);
1678 case TYPE_CODE_ARRAY:
1679 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1680 return value_f90_subarray (arg1, exp, pos, noside);
1682 goto multi_f77_subscript;
1684 case TYPE_CODE_STRING:
1685 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1686 return value_f90_subarray (arg1, exp, pos, noside);
1689 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1690 return value_subscript (arg1, value_as_long (arg2));
1694 case TYPE_CODE_FUNC:
1695 /* It's a function call. */
1696 /* Allocate arg vector, including space for the function to be
1697 called in argvec[0] and a terminating NULL */
1698 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
1701 for (; tem <= nargs; tem++)
1702 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1703 argvec[tem] = 0; /* signal end of arglist */
1707 error (_("Cannot perform substring on this type"));
1711 /* We have a complex number, There should be 2 floating
1712 point numbers that compose it */
1714 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1715 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1717 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1719 case STRUCTOP_STRUCT:
1720 tem = longest_to_int (exp->elts[pc + 1].longconst);
1721 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1722 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1723 if (noside == EVAL_SKIP)
1725 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1726 return value_zero (lookup_struct_elt_type (value_type (arg1),
1727 &exp->elts[pc + 2].string,
1732 struct value *temp = arg1;
1733 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1738 tem = longest_to_int (exp->elts[pc + 1].longconst);
1739 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1740 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1741 if (noside == EVAL_SKIP)
1744 /* JYG: if print object is on we need to replace the base type
1745 with rtti type in order to continue on with successful
1746 lookup of member / method only available in the rtti type. */
1748 struct type *type = value_type (arg1);
1749 struct type *real_type;
1750 int full, top, using_enc;
1751 struct value_print_options opts;
1753 get_user_print_options (&opts);
1754 if (opts.objectprint && TYPE_TARGET_TYPE(type)
1755 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1757 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1760 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1761 real_type = lookup_pointer_type (real_type);
1763 real_type = lookup_reference_type (real_type);
1765 arg1 = value_cast (real_type, arg1);
1770 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1771 return value_zero (lookup_struct_elt_type (value_type (arg1),
1772 &exp->elts[pc + 2].string,
1777 struct value *temp = arg1;
1778 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1779 NULL, "structure pointer");
1782 case STRUCTOP_MEMBER:
1784 if (op == STRUCTOP_MEMBER)
1785 arg1 = evaluate_subexp_for_address (exp, pos, noside);
1787 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1789 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1791 if (noside == EVAL_SKIP)
1794 type = check_typedef (value_type (arg2));
1795 switch (TYPE_CODE (type))
1797 case TYPE_CODE_METHODPTR:
1798 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1799 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
1802 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
1803 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
1804 return value_ind (arg2);
1807 case TYPE_CODE_MEMBERPTR:
1808 /* Now, convert these values to an address. */
1809 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
1812 mem_offset = value_as_long (arg2);
1814 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
1815 value_as_long (arg1) + mem_offset);
1816 return value_ind (arg3);
1819 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1823 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1824 arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
1825 for (ix = 0; ix < nargs; ++ix)
1826 arg_types[ix] = exp->elts[pc + 1 + ix + 1].type;
1828 expect_type = make_params (nargs, arg_types);
1829 *(pos) += 3 + nargs;
1830 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
1831 xfree (TYPE_FIELDS (expect_type));
1832 xfree (TYPE_MAIN_TYPE (expect_type));
1833 xfree (expect_type);
1837 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1838 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1839 if (noside == EVAL_SKIP)
1841 if (binop_user_defined_p (op, arg1, arg2))
1842 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1844 return value_concat (arg1, arg2);
1847 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1848 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1850 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1852 if (binop_user_defined_p (op, arg1, arg2))
1853 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1855 return value_assign (arg1, arg2);
1857 case BINOP_ASSIGN_MODIFY:
1859 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1860 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1861 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1863 op = exp->elts[pc + 1].opcode;
1864 if (binop_user_defined_p (op, arg1, arg2))
1865 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
1866 else if (op == BINOP_ADD && ptrmath_type_p (value_type (arg1))
1867 && is_integral_type (value_type (arg2)))
1868 arg2 = value_ptradd (arg1, value_as_long (arg2));
1869 else if (op == BINOP_SUB && ptrmath_type_p (value_type (arg1))
1870 && is_integral_type (value_type (arg2)))
1871 arg2 = value_ptradd (arg1, - value_as_long (arg2));
1874 struct value *tmp = arg1;
1876 /* For shift and integer exponentiation operations,
1877 only promote the first argument. */
1878 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1879 && is_integral_type (value_type (arg2)))
1880 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
1882 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
1884 arg2 = value_binop (tmp, arg2, op);
1886 return value_assign (arg1, arg2);
1889 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1890 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1891 if (noside == EVAL_SKIP)
1893 if (binop_user_defined_p (op, arg1, arg2))
1894 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1895 else if (ptrmath_type_p (value_type (arg1))
1896 && is_integral_type (value_type (arg2)))
1897 return value_ptradd (arg1, value_as_long (arg2));
1898 else if (ptrmath_type_p (value_type (arg2))
1899 && is_integral_type (value_type (arg1)))
1900 return value_ptradd (arg2, value_as_long (arg1));
1903 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1904 return value_binop (arg1, arg2, BINOP_ADD);
1908 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1909 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1910 if (noside == EVAL_SKIP)
1912 if (binop_user_defined_p (op, arg1, arg2))
1913 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1914 else if (ptrmath_type_p (value_type (arg1))
1915 && ptrmath_type_p (value_type (arg2)))
1917 /* FIXME -- should be ptrdiff_t */
1918 type = builtin_type (exp->gdbarch)->builtin_long;
1919 return value_from_longest (type, value_ptrdiff (arg1, arg2));
1921 else if (ptrmath_type_p (value_type (arg1))
1922 && is_integral_type (value_type (arg2)))
1923 return value_ptradd (arg1, - value_as_long (arg2));
1926 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1927 return value_binop (arg1, arg2, BINOP_SUB);
1938 case BINOP_BITWISE_AND:
1939 case BINOP_BITWISE_IOR:
1940 case BINOP_BITWISE_XOR:
1941 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1942 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1943 if (noside == EVAL_SKIP)
1945 if (binop_user_defined_p (op, arg1, arg2))
1946 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1949 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1950 fudge arg2 to avoid division-by-zero, the caller is
1951 (theoretically) only looking for the type of the result. */
1952 if (noside == EVAL_AVOID_SIDE_EFFECTS
1953 /* ??? Do we really want to test for BINOP_MOD here?
1954 The implementation of value_binop gives it a well-defined
1957 || op == BINOP_INTDIV
1960 && value_logical_not (arg2))
1962 struct value *v_one, *retval;
1964 v_one = value_one (value_type (arg2), not_lval);
1965 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
1966 retval = value_binop (arg1, v_one, op);
1971 /* For shift and integer exponentiation operations,
1972 only promote the first argument. */
1973 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1974 && is_integral_type (value_type (arg2)))
1975 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
1977 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1979 return value_binop (arg1, arg2, op);
1984 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1985 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1986 if (noside == EVAL_SKIP)
1988 error (_("':' operator used in invalid context"));
1990 case BINOP_SUBSCRIPT:
1991 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1992 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1993 if (noside == EVAL_SKIP)
1995 if (binop_user_defined_p (op, arg1, arg2))
1996 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1999 /* If the user attempts to subscript something that is not an
2000 array or pointer type (like a plain int variable for example),
2001 then report this as an error. */
2003 arg1 = coerce_ref (arg1);
2004 type = check_typedef (value_type (arg1));
2005 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
2006 && TYPE_CODE (type) != TYPE_CODE_PTR)
2008 if (TYPE_NAME (type))
2009 error (_("cannot subscript something of type `%s'"),
2012 error (_("cannot subscript requested type"));
2015 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2016 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
2018 return value_subscript (arg1, value_as_long (arg2));
2022 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2023 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2024 if (noside == EVAL_SKIP)
2026 type = language_bool_type (exp->language_defn, exp->gdbarch);
2027 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
2029 case MULTI_SUBSCRIPT:
2031 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2032 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2035 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2036 /* FIXME: EVAL_SKIP handling may not be correct. */
2037 if (noside == EVAL_SKIP)
2048 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2049 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2051 /* If the user attempts to subscript something that has no target
2052 type (like a plain int variable for example), then report this
2055 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
2058 arg1 = value_zero (type, VALUE_LVAL (arg1));
2064 error (_("cannot subscript something of type `%s'"),
2065 TYPE_NAME (value_type (arg1)));
2069 if (binop_user_defined_p (op, arg1, arg2))
2071 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
2075 arg1 = coerce_ref (arg1);
2076 type = check_typedef (value_type (arg1));
2078 switch (TYPE_CODE (type))
2081 case TYPE_CODE_ARRAY:
2082 case TYPE_CODE_STRING:
2083 arg1 = value_subscript (arg1, value_as_long (arg2));
2086 case TYPE_CODE_BITSTRING:
2087 type = language_bool_type (exp->language_defn, exp->gdbarch);
2088 arg1 = value_bitstring_subscript (type, arg1,
2089 value_as_long (arg2));
2093 if (TYPE_NAME (type))
2094 error (_("cannot subscript something of type `%s'"),
2097 error (_("cannot subscript requested type"));
2103 multi_f77_subscript:
2105 int subscript_array[MAX_FORTRAN_DIMS];
2106 int array_size_array[MAX_FORTRAN_DIMS];
2107 int ndimensions = 1, i;
2108 struct type *tmp_type;
2109 int offset_item; /* The array offset where the item lives */
2111 if (nargs > MAX_FORTRAN_DIMS)
2112 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
2114 tmp_type = check_typedef (value_type (arg1));
2115 ndimensions = calc_f77_array_dims (type);
2117 if (nargs != ndimensions)
2118 error (_("Wrong number of subscripts"));
2120 gdb_assert (nargs > 0);
2122 /* Now that we know we have a legal array subscript expression
2123 let us actually find out where this element exists in the array. */
2126 /* Take array indices left to right */
2127 for (i = 0; i < nargs; i++)
2129 /* Evaluate each subscript, It must be a legal integer in F77 */
2130 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2132 /* Fill in the subscript and array size arrays */
2134 subscript_array[i] = value_as_long (arg2);
2137 /* Internal type of array is arranged right to left */
2138 for (i = 0; i < nargs; i++)
2140 upper = f77_get_upperbound (tmp_type);
2141 lower = f77_get_lowerbound (tmp_type);
2143 array_size_array[nargs - i - 1] = upper - lower + 1;
2145 /* Zero-normalize subscripts so that offsetting will work. */
2147 subscript_array[nargs - i - 1] -= lower;
2149 /* If we are at the bottom of a multidimensional
2150 array type then keep a ptr to the last ARRAY
2151 type around for use when calling value_subscript()
2152 below. This is done because we pretend to value_subscript
2153 that we actually have a one-dimensional array
2154 of base element type that we apply a simple
2158 tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
2161 /* Now let us calculate the offset for this item */
2163 offset_item = subscript_array[ndimensions - 1];
2165 for (i = ndimensions - 1; i > 0; --i)
2167 array_size_array[i - 1] * offset_item + subscript_array[i - 1];
2169 /* Let us now play a dirty trick: we will take arg1
2170 which is a value node pointing to the topmost level
2171 of the multidimensional array-set and pretend
2172 that it is actually a array of the final element
2173 type, this will ensure that value_subscript()
2174 returns the correct type value */
2176 deprecated_set_value_type (arg1, tmp_type);
2177 return value_subscripted_rvalue (arg1, offset_item, 0);
2180 case BINOP_LOGICAL_AND:
2181 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2182 if (noside == EVAL_SKIP)
2184 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2189 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2192 if (binop_user_defined_p (op, arg1, arg2))
2194 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2195 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2199 tem = value_logical_not (arg1);
2200 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2201 (tem ? EVAL_SKIP : noside));
2202 type = language_bool_type (exp->language_defn, exp->gdbarch);
2203 return value_from_longest (type,
2204 (LONGEST) (!tem && !value_logical_not (arg2)));
2207 case BINOP_LOGICAL_OR:
2208 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2209 if (noside == EVAL_SKIP)
2211 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2216 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2219 if (binop_user_defined_p (op, arg1, arg2))
2221 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2222 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2226 tem = value_logical_not (arg1);
2227 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2228 (!tem ? EVAL_SKIP : noside));
2229 type = language_bool_type (exp->language_defn, exp->gdbarch);
2230 return value_from_longest (type,
2231 (LONGEST) (!tem || !value_logical_not (arg2)));
2235 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2236 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2237 if (noside == EVAL_SKIP)
2239 if (binop_user_defined_p (op, arg1, arg2))
2241 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2245 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2246 tem = value_equal (arg1, arg2);
2247 type = language_bool_type (exp->language_defn, exp->gdbarch);
2248 return value_from_longest (type, (LONGEST) tem);
2251 case BINOP_NOTEQUAL:
2252 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2253 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2254 if (noside == EVAL_SKIP)
2256 if (binop_user_defined_p (op, arg1, arg2))
2258 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2262 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2263 tem = value_equal (arg1, arg2);
2264 type = language_bool_type (exp->language_defn, exp->gdbarch);
2265 return value_from_longest (type, (LONGEST) ! tem);
2269 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2270 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2271 if (noside == EVAL_SKIP)
2273 if (binop_user_defined_p (op, arg1, arg2))
2275 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2279 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2280 tem = value_less (arg1, arg2);
2281 type = language_bool_type (exp->language_defn, exp->gdbarch);
2282 return value_from_longest (type, (LONGEST) tem);
2286 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2287 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2288 if (noside == EVAL_SKIP)
2290 if (binop_user_defined_p (op, arg1, arg2))
2292 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2296 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2297 tem = value_less (arg2, arg1);
2298 type = language_bool_type (exp->language_defn, exp->gdbarch);
2299 return value_from_longest (type, (LONGEST) tem);
2303 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2304 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2305 if (noside == EVAL_SKIP)
2307 if (binop_user_defined_p (op, arg1, arg2))
2309 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2313 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2314 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2315 type = language_bool_type (exp->language_defn, exp->gdbarch);
2316 return value_from_longest (type, (LONGEST) tem);
2320 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2321 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2322 if (noside == EVAL_SKIP)
2324 if (binop_user_defined_p (op, arg1, arg2))
2326 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2330 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2331 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2332 type = language_bool_type (exp->language_defn, exp->gdbarch);
2333 return value_from_longest (type, (LONGEST) tem);
2337 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2338 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2339 if (noside == EVAL_SKIP)
2341 type = check_typedef (value_type (arg2));
2342 if (TYPE_CODE (type) != TYPE_CODE_INT)
2343 error (_("Non-integral right operand for \"@\" operator."));
2344 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2346 return allocate_repeat_value (value_type (arg1),
2347 longest_to_int (value_as_long (arg2)));
2350 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2353 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2354 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2357 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2358 if (noside == EVAL_SKIP)
2360 if (unop_user_defined_p (op, arg1))
2361 return value_x_unop (arg1, op, noside);
2364 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2365 return value_pos (arg1);
2369 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2370 if (noside == EVAL_SKIP)
2372 if (unop_user_defined_p (op, arg1))
2373 return value_x_unop (arg1, op, noside);
2376 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2377 return value_neg (arg1);
2380 case UNOP_COMPLEMENT:
2381 /* C++: check for and handle destructor names. */
2382 op = exp->elts[*pos].opcode;
2384 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2385 if (noside == EVAL_SKIP)
2387 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2388 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2391 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2392 return value_complement (arg1);
2395 case UNOP_LOGICAL_NOT:
2396 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2397 if (noside == EVAL_SKIP)
2399 if (unop_user_defined_p (op, arg1))
2400 return value_x_unop (arg1, op, noside);
2403 type = language_bool_type (exp->language_defn, exp->gdbarch);
2404 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2408 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2409 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2410 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2411 type = check_typedef (value_type (arg1));
2412 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2413 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2414 error (_("Attempt to dereference pointer to member without an object"));
2415 if (noside == EVAL_SKIP)
2417 if (unop_user_defined_p (op, arg1))
2418 return value_x_unop (arg1, op, noside);
2419 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2421 type = check_typedef (value_type (arg1));
2422 if (TYPE_CODE (type) == TYPE_CODE_PTR
2423 || TYPE_CODE (type) == TYPE_CODE_REF
2424 /* In C you can dereference an array to get the 1st elt. */
2425 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2427 return value_zero (TYPE_TARGET_TYPE (type),
2429 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2430 /* GDB allows dereferencing an int. */
2431 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2434 error (_("Attempt to take contents of a non-pointer value."));
2437 /* Allow * on an integer so we can cast it to whatever we want.
2438 This returns an int, which seems like the most C-like thing to
2439 do. "long long" variables are rare enough that
2440 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2441 if (TYPE_CODE (type) == TYPE_CODE_INT)
2442 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2443 (CORE_ADDR) value_as_address (arg1));
2444 return value_ind (arg1);
2447 /* C++: check for and handle pointer to members. */
2449 op = exp->elts[*pos].opcode;
2451 if (noside == EVAL_SKIP)
2453 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2458 struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
2463 if (noside == EVAL_SKIP)
2465 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2468 return evaluate_subexp_for_sizeof (exp, pos);
2472 type = exp->elts[pc + 1].type;
2473 arg1 = evaluate_subexp (type, exp, pos, noside);
2474 if (noside == EVAL_SKIP)
2476 if (type != value_type (arg1))
2477 arg1 = value_cast (type, arg1);
2480 case UNOP_DYNAMIC_CAST:
2482 type = exp->elts[pc + 1].type;
2483 arg1 = evaluate_subexp (type, exp, pos, noside);
2484 if (noside == EVAL_SKIP)
2486 return value_dynamic_cast (type, arg1);
2488 case UNOP_REINTERPRET_CAST:
2490 type = exp->elts[pc + 1].type;
2491 arg1 = evaluate_subexp (type, exp, pos, noside);
2492 if (noside == EVAL_SKIP)
2494 return value_reinterpret_cast (type, arg1);
2498 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2499 if (noside == EVAL_SKIP)
2501 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2502 return value_zero (exp->elts[pc + 1].type, lval_memory);
2504 return value_at_lazy (exp->elts[pc + 1].type,
2505 value_as_address (arg1));
2507 case UNOP_MEMVAL_TLS:
2509 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2510 if (noside == EVAL_SKIP)
2512 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2513 return value_zero (exp->elts[pc + 2].type, lval_memory);
2517 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2518 value_as_address (arg1));
2519 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2522 case UNOP_PREINCREMENT:
2523 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2524 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2526 else if (unop_user_defined_p (op, arg1))
2528 return value_x_unop (arg1, op, noside);
2532 if (ptrmath_type_p (value_type (arg1)))
2533 arg2 = value_ptradd (arg1, 1);
2536 struct value *tmp = arg1;
2537 arg2 = value_one (value_type (arg1), not_lval);
2538 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2539 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2542 return value_assign (arg1, arg2);
2545 case UNOP_PREDECREMENT:
2546 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2547 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2549 else if (unop_user_defined_p (op, arg1))
2551 return value_x_unop (arg1, op, noside);
2555 if (ptrmath_type_p (value_type (arg1)))
2556 arg2 = value_ptradd (arg1, -1);
2559 struct value *tmp = arg1;
2560 arg2 = value_one (value_type (arg1), not_lval);
2561 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2562 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2565 return value_assign (arg1, arg2);
2568 case UNOP_POSTINCREMENT:
2569 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2570 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2572 else if (unop_user_defined_p (op, arg1))
2574 return value_x_unop (arg1, op, noside);
2578 if (ptrmath_type_p (value_type (arg1)))
2579 arg2 = value_ptradd (arg1, 1);
2582 struct value *tmp = arg1;
2583 arg2 = value_one (value_type (arg1), not_lval);
2584 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2585 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2588 value_assign (arg1, arg2);
2592 case UNOP_POSTDECREMENT:
2593 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2594 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2596 else if (unop_user_defined_p (op, arg1))
2598 return value_x_unop (arg1, op, noside);
2602 if (ptrmath_type_p (value_type (arg1)))
2603 arg2 = value_ptradd (arg1, -1);
2606 struct value *tmp = arg1;
2607 arg2 = value_one (value_type (arg1), not_lval);
2608 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2609 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2612 value_assign (arg1, arg2);
2618 return value_of_this (1);
2622 return value_of_local ("self", 1);
2625 /* The value is not supposed to be used. This is here to make it
2626 easier to accommodate expressions that contain types. */
2628 if (noside == EVAL_SKIP)
2630 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2632 struct type *type = exp->elts[pc + 1].type;
2633 /* If this is a typedef, then find its immediate target. We
2634 use check_typedef to resolve stubs, but we ignore its
2635 result because we do not want to dig past all
2637 check_typedef (type);
2638 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2639 type = TYPE_TARGET_TYPE (type);
2640 return allocate_value (type);
2643 error (_("Attempt to use a type name as an expression"));
2646 /* Removing this case and compiling with gcc -Wall reveals that
2647 a lot of cases are hitting this case. Some of these should
2648 probably be removed from expression.h; others are legitimate
2649 expressions which are (apparently) not fully implemented.
2651 If there are any cases landing here which mean a user error,
2652 then they should be separate cases, with more descriptive
2656 GDB does not (yet) know how to evaluate that kind of expression"));
2660 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
2663 /* Evaluate a subexpression of EXP, at index *POS,
2664 and return the address of that subexpression.
2665 Advance *POS over the subexpression.
2666 If the subexpression isn't an lvalue, get an error.
2667 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2668 then only the type of the result need be correct. */
2670 static struct value *
2671 evaluate_subexp_for_address (struct expression *exp, int *pos,
2681 op = exp->elts[pc].opcode;
2687 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2689 /* We can't optimize out "&*" if there's a user-defined operator*. */
2690 if (unop_user_defined_p (op, x))
2692 x = value_x_unop (x, op, noside);
2693 goto default_case_after_eval;
2696 return coerce_array (x);
2700 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2701 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2704 var = exp->elts[pc + 2].symbol;
2706 /* C++: The "address" of a reference should yield the address
2707 * of the object pointed to. Let value_addr() deal with it. */
2708 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2712 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2715 lookup_pointer_type (SYMBOL_TYPE (var));
2716 enum address_class sym_class = SYMBOL_CLASS (var);
2718 if (sym_class == LOC_CONST
2719 || sym_class == LOC_CONST_BYTES
2720 || sym_class == LOC_REGISTER)
2721 error (_("Attempt to take address of register or constant."));
2724 value_zero (type, not_lval);
2727 return address_of_variable (var, exp->elts[pc + 1].block);
2730 tem = longest_to_int (exp->elts[pc + 2].longconst);
2731 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2732 x = value_aggregate_elt (exp->elts[pc + 1].type,
2733 &exp->elts[pc + 3].string,
2736 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2741 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2742 default_case_after_eval:
2743 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2745 struct type *type = check_typedef (value_type (x));
2747 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2748 return value_zero (lookup_pointer_type (value_type (x)),
2750 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2751 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2754 error (_("Attempt to take address of value not located in memory."));
2756 return value_addr (x);
2760 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2761 When used in contexts where arrays will be coerced anyway, this is
2762 equivalent to `evaluate_subexp' but much faster because it avoids
2763 actually fetching array contents (perhaps obsolete now that we have
2766 Note that we currently only do the coercion for C expressions, where
2767 arrays are zero based and the coercion is correct. For other languages,
2768 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2769 to decide if coercion is appropriate.
2774 evaluate_subexp_with_coercion (struct expression *exp,
2775 int *pos, enum noside noside)
2784 op = exp->elts[pc].opcode;
2789 var = exp->elts[pc + 2].symbol;
2790 type = check_typedef (SYMBOL_TYPE (var));
2791 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
2792 && CAST_IS_CONVERSION)
2795 val = address_of_variable (var, exp->elts[pc + 1].block);
2796 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2802 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2806 /* Evaluate a subexpression of EXP, at index *POS,
2807 and return a value for the size of that subexpression.
2808 Advance *POS over the subexpression. */
2810 static struct value *
2811 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
2813 /* FIXME: This should be size_t. */
2814 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2821 op = exp->elts[pc].opcode;
2825 /* This case is handled specially
2826 so that we avoid creating a value for the result type.
2827 If the result type is very big, it's desirable not to
2828 create a value unnecessarily. */
2831 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2832 type = check_typedef (value_type (val));
2833 if (TYPE_CODE (type) != TYPE_CODE_PTR
2834 && TYPE_CODE (type) != TYPE_CODE_REF
2835 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
2836 error (_("Attempt to take contents of a non-pointer value."));
2837 type = check_typedef (TYPE_TARGET_TYPE (type));
2838 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2842 type = check_typedef (exp->elts[pc + 1].type);
2843 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2847 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
2849 value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2852 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2853 return value_from_longest (size_type,
2854 (LONGEST) TYPE_LENGTH (value_type (val)));
2858 /* Parse a type expression in the string [P..P+LENGTH). */
2861 parse_and_eval_type (char *p, int length)
2863 char *tmp = (char *) alloca (length + 4);
2864 struct expression *expr;
2866 memcpy (tmp + 1, p, length);
2867 tmp[length + 1] = ')';
2868 tmp[length + 2] = '0';
2869 tmp[length + 3] = '\0';
2870 expr = parse_expression (tmp);
2871 if (expr->elts[0].opcode != UNOP_CAST)
2872 error (_("Internal error in eval_type."));
2873 return expr->elts[1].type;
2877 calc_f77_array_dims (struct type *array_type)
2880 struct type *tmp_type;
2882 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
2883 error (_("Can't get dimensions for a non-array type"));
2885 tmp_type = array_type;
2887 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
2889 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)