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 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 "python/python.h"
45 #include "gdb_assert.h"
49 /* This is defined in valops.c */
50 extern int overload_resolution;
52 /* Prototypes for local functions. */
54 static struct value *evaluate_subexp_for_sizeof (struct expression *, int *);
56 static struct value *evaluate_subexp_for_address (struct expression *,
59 static 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 && field_is_static (&TYPE_FIELD (struct_type,
325 subfieldno = fieldno;
326 if (fieldno >= TYPE_NFIELDS (struct_type))
327 error (_("too many initializers"));
328 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
329 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
330 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
331 error (_("don't know which variant you want to set"));
335 /* Here, struct_type is the type of the inner struct,
336 while substruct_type is the type of the inner struct.
337 These are the same for normal structures, but a variant struct
338 contains anonymous union fields that contain substruct fields.
339 The value fieldno is the index of the top-level (normal or
340 anonymous union) field in struct_field, while the value
341 subfieldno is the index of the actual real (named inner) field
342 in substruct_type. */
344 field_type = TYPE_FIELD_TYPE (substruct_type, subfieldno);
346 val = evaluate_subexp (field_type, exp, pos, noside);
348 /* Now actually set the field in struct_val. */
350 /* Assign val to field fieldno. */
351 if (value_type (val) != field_type)
352 val = value_cast (field_type, val);
354 bitsize = TYPE_FIELD_BITSIZE (substruct_type, subfieldno);
355 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
357 bitpos += TYPE_FIELD_BITPOS (substruct_type, subfieldno);
358 addr = value_contents_writeable (struct_val) + bitpos / 8;
360 modify_field (addr, value_as_long (val),
361 bitpos % 8, bitsize);
363 memcpy (addr, value_contents (val),
364 TYPE_LENGTH (value_type (val)));
366 while (--nlabels > 0);
371 /* Recursive helper function for setting elements of array tuples for
372 (the deleted) Chill. The target is ARRAY (which has bounds
373 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
374 and NOSIDE are as usual. Evaluates index expresions and sets the
375 specified element(s) of ARRAY to ELEMENT. Returns last index
379 init_array_element (struct value *array, struct value *element,
380 struct expression *exp, int *pos,
381 enum noside noside, LONGEST low_bound, LONGEST high_bound)
384 int element_size = TYPE_LENGTH (value_type (element));
385 if (exp->elts[*pos].opcode == BINOP_COMMA)
388 init_array_element (array, element, exp, pos, noside,
389 low_bound, high_bound);
390 return init_array_element (array, element,
391 exp, pos, noside, low_bound, high_bound);
393 else if (exp->elts[*pos].opcode == BINOP_RANGE)
397 low = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
398 high = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
399 if (low < low_bound || high > high_bound)
400 error (_("tuple range index out of range"));
401 for (index = low; index <= high; index++)
403 memcpy (value_contents_raw (array)
404 + (index - low_bound) * element_size,
405 value_contents (element), element_size);
410 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
411 if (index < low_bound || index > high_bound)
412 error (_("tuple index out of range"));
413 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
414 value_contents (element), element_size);
419 static struct value *
420 value_f90_subarray (struct value *array,
421 struct expression *exp, int *pos, enum noside noside)
424 LONGEST low_bound, high_bound;
425 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
426 enum f90_range_type range_type = longest_to_int (exp->elts[pc].longconst);
430 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
431 low_bound = TYPE_LOW_BOUND (range);
433 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
435 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
436 high_bound = TYPE_HIGH_BOUND (range);
438 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
440 return value_slice (array, low_bound, high_bound - low_bound + 1);
444 /* Promote value ARG1 as appropriate before performing a unary operation
446 If the result is not appropriate for any particular language then it
447 needs to patch this function. */
450 unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
455 *arg1 = coerce_ref (*arg1);
456 type1 = check_typedef (value_type (*arg1));
458 if (is_integral_type (type1))
460 switch (language->la_language)
463 /* Perform integral promotion for ANSI C/C++.
464 If not appropropriate for any particular language
465 it needs to modify this function. */
467 struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
468 if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
469 *arg1 = value_cast (builtin_int, *arg1);
476 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
477 operation on those two operands.
478 If the result is not appropriate for any particular language then it
479 needs to patch this function. */
482 binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
483 struct value **arg1, struct value **arg2)
485 struct type *promoted_type = NULL;
489 *arg1 = coerce_ref (*arg1);
490 *arg2 = coerce_ref (*arg2);
492 type1 = check_typedef (value_type (*arg1));
493 type2 = check_typedef (value_type (*arg2));
495 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
496 && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
497 && !is_integral_type (type1))
498 || (TYPE_CODE (type2) != TYPE_CODE_FLT
499 && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
500 && !is_integral_type (type2)))
503 if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
504 || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
506 /* No promotion required. */
508 else if (TYPE_CODE (type1) == TYPE_CODE_FLT
509 || TYPE_CODE (type2) == TYPE_CODE_FLT)
511 switch (language->la_language)
517 /* No promotion required. */
521 /* For other languages the result type is unchanged from gdb
522 version 6.7 for backward compatibility.
523 If either arg was long double, make sure that value is also long
524 double. Otherwise use double. */
525 if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch)
526 || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
527 promoted_type = builtin_type (gdbarch)->builtin_long_double;
529 promoted_type = builtin_type (gdbarch)->builtin_double;
533 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
534 && TYPE_CODE (type2) == TYPE_CODE_BOOL)
536 /* No promotion required. */
539 /* Integral operations here. */
540 /* FIXME: Also mixed integral/booleans, with result an integer. */
542 const struct builtin_type *builtin = builtin_type (gdbarch);
543 unsigned int promoted_len1 = TYPE_LENGTH (type1);
544 unsigned int promoted_len2 = TYPE_LENGTH (type2);
545 int is_unsigned1 = TYPE_UNSIGNED (type1);
546 int is_unsigned2 = TYPE_UNSIGNED (type2);
547 unsigned int result_len;
548 int unsigned_operation;
550 /* Determine type length and signedness after promotion for
552 if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int))
555 promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
557 if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
560 promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
563 if (promoted_len1 > promoted_len2)
565 unsigned_operation = is_unsigned1;
566 result_len = promoted_len1;
568 else if (promoted_len2 > promoted_len1)
570 unsigned_operation = is_unsigned2;
571 result_len = promoted_len2;
575 unsigned_operation = is_unsigned1 || is_unsigned2;
576 result_len = promoted_len1;
579 switch (language->la_language)
585 if (result_len <= TYPE_LENGTH (builtin->builtin_int))
587 promoted_type = (unsigned_operation
588 ? builtin->builtin_unsigned_int
589 : builtin->builtin_int);
591 else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
593 promoted_type = (unsigned_operation
594 ? builtin->builtin_unsigned_long
595 : builtin->builtin_long);
599 promoted_type = (unsigned_operation
600 ? builtin->builtin_unsigned_long_long
601 : builtin->builtin_long_long);
606 /* For other languages the result type is unchanged from gdb
607 version 6.7 for backward compatibility.
608 If either arg was long long, make sure that value is also long
609 long. Otherwise use long. */
610 if (unsigned_operation)
612 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
613 promoted_type = builtin->builtin_unsigned_long_long;
615 promoted_type = builtin->builtin_unsigned_long;
619 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
620 promoted_type = builtin->builtin_long_long;
622 promoted_type = builtin->builtin_long;
630 /* Promote both operands to common type. */
631 *arg1 = value_cast (promoted_type, *arg1);
632 *arg2 = value_cast (promoted_type, *arg2);
637 ptrmath_type_p (struct type *type)
639 type = check_typedef (type);
640 if (TYPE_CODE (type) == TYPE_CODE_REF)
641 type = TYPE_TARGET_TYPE (type);
643 switch (TYPE_CODE (type))
649 case TYPE_CODE_ARRAY:
650 return current_language->c_style_arrays;
658 evaluate_subexp_standard (struct type *expect_type,
659 struct expression *exp, int *pos,
664 int pc, pc2 = 0, oldpos;
665 struct value *arg1 = NULL;
666 struct value *arg2 = NULL;
670 struct value **argvec;
671 int upper, lower, retcode;
675 struct type **arg_types;
679 op = exp->elts[pc].opcode;
684 tem = longest_to_int (exp->elts[pc + 2].longconst);
685 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
686 if (noside == EVAL_SKIP)
688 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
689 &exp->elts[pc + 3].string,
692 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
697 return value_from_longest (exp->elts[pc + 1].type,
698 exp->elts[pc + 2].longconst);
702 return value_from_double (exp->elts[pc + 1].type,
703 exp->elts[pc + 2].doubleconst);
707 return value_from_decfloat (exp->elts[pc + 1].type,
708 exp->elts[pc + 2].decfloatconst);
712 if (noside == EVAL_SKIP)
715 /* JYG: We used to just return value_zero of the symbol type
716 if we're asked to avoid side effects. Otherwise we return
717 value_of_variable (...). However I'm not sure if
718 value_of_variable () has any side effect.
719 We need a full value object returned here for whatis_exp ()
720 to call evaluate_type () and then pass the full value to
721 value_rtti_target_type () if we are dealing with a pointer
722 or reference to a base class and print object is on. */
725 volatile struct gdb_exception except;
726 struct value *ret = NULL;
728 TRY_CATCH (except, RETURN_MASK_ERROR)
730 ret = value_of_variable (exp->elts[pc + 2].symbol,
731 exp->elts[pc + 1].block);
734 if (except.reason < 0)
736 if (noside == EVAL_AVOID_SIDE_EFFECTS)
737 ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol), not_lval);
739 throw_exception (except);
748 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
752 const char *name = &exp->elts[pc + 2].string;
756 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
757 regno = user_reg_map_name_to_regnum (current_gdbarch,
758 name, strlen (name));
760 error (_("Register $%s not available."), name);
762 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
763 a value with the appropriate register type. Unfortunately,
764 we don't have easy access to the type of user registers.
765 So for these registers, we fetch the register value regardless
766 of the evaluation mode. */
767 if (noside == EVAL_AVOID_SIDE_EFFECTS
768 && regno < gdbarch_num_regs (current_gdbarch)
769 + gdbarch_num_pseudo_regs (current_gdbarch))
770 val = value_zero (register_type (current_gdbarch, regno), not_lval);
772 val = value_of_register (regno, get_selected_frame (NULL));
774 error (_("Value of register %s not available."), name);
780 type = language_bool_type (exp->language_defn, exp->gdbarch);
781 return value_from_longest (type, exp->elts[pc + 1].longconst);
785 return value_of_internalvar (exp->elts[pc + 1].internalvar);
788 tem = longest_to_int (exp->elts[pc + 1].longconst);
789 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
790 if (noside == EVAL_SKIP)
792 return value_string (&exp->elts[pc + 2].string, tem);
794 case OP_OBJC_NSSTRING: /* Objective C Foundation Class NSString constant. */
795 tem = longest_to_int (exp->elts[pc + 1].longconst);
796 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
797 if (noside == EVAL_SKIP)
801 return (struct value *) value_nsstring (&exp->elts[pc + 2].string, tem + 1);
804 tem = longest_to_int (exp->elts[pc + 1].longconst);
806 += 3 + BYTES_TO_EXP_ELEM ((tem + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
807 if (noside == EVAL_SKIP)
809 return value_bitstring (&exp->elts[pc + 2].string, tem);
814 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
815 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
816 nargs = tem3 - tem2 + 1;
817 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
819 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
820 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
822 struct value *rec = allocate_value (expect_type);
823 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
824 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
827 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
828 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
830 struct type *range_type = TYPE_INDEX_TYPE (type);
831 struct type *element_type = TYPE_TARGET_TYPE (type);
832 struct value *array = allocate_value (expect_type);
833 int element_size = TYPE_LENGTH (check_typedef (element_type));
834 LONGEST low_bound, high_bound, index;
835 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
838 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
841 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
842 for (tem = nargs; --nargs >= 0;)
844 struct value *element;
846 if (exp->elts[*pos].opcode == BINOP_RANGE)
849 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
851 element = evaluate_subexp (element_type, exp, pos, noside);
852 if (value_type (element) != element_type)
853 element = value_cast (element_type, element);
856 int continue_pc = *pos;
858 index = init_array_element (array, element, exp, pos, noside,
859 low_bound, high_bound);
864 if (index > high_bound)
865 /* to avoid memory corruption */
866 error (_("Too many array elements"));
867 memcpy (value_contents_raw (array)
868 + (index - low_bound) * element_size,
869 value_contents (element),
877 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
878 && TYPE_CODE (type) == TYPE_CODE_SET)
880 struct value *set = allocate_value (expect_type);
881 gdb_byte *valaddr = value_contents_raw (set);
882 struct type *element_type = TYPE_INDEX_TYPE (type);
883 struct type *check_type = element_type;
884 LONGEST low_bound, high_bound;
886 /* get targettype of elementtype */
887 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE ||
888 TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
889 check_type = TYPE_TARGET_TYPE (check_type);
891 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
892 error (_("(power)set type with unknown size"));
893 memset (valaddr, '\0', TYPE_LENGTH (type));
894 for (tem = 0; tem < nargs; tem++)
896 LONGEST range_low, range_high;
897 struct type *range_low_type, *range_high_type;
898 struct value *elem_val;
899 if (exp->elts[*pos].opcode == BINOP_RANGE)
902 elem_val = evaluate_subexp (element_type, exp, pos, noside);
903 range_low_type = value_type (elem_val);
904 range_low = value_as_long (elem_val);
905 elem_val = evaluate_subexp (element_type, exp, pos, noside);
906 range_high_type = value_type (elem_val);
907 range_high = value_as_long (elem_val);
911 elem_val = evaluate_subexp (element_type, exp, pos, noside);
912 range_low_type = range_high_type = value_type (elem_val);
913 range_low = range_high = value_as_long (elem_val);
915 /* check types of elements to avoid mixture of elements from
916 different types. Also check if type of element is "compatible"
917 with element type of powerset */
918 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
919 range_low_type = TYPE_TARGET_TYPE (range_low_type);
920 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
921 range_high_type = TYPE_TARGET_TYPE (range_high_type);
922 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type)) ||
923 (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM &&
924 (range_low_type != range_high_type)))
925 /* different element modes */
926 error (_("POWERSET tuple elements of different mode"));
927 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type)) ||
928 (TYPE_CODE (check_type) == TYPE_CODE_ENUM &&
929 range_low_type != check_type))
930 error (_("incompatible POWERSET tuple elements"));
931 if (range_low > range_high)
933 warning (_("empty POWERSET tuple range"));
936 if (range_low < low_bound || range_high > high_bound)
937 error (_("POWERSET tuple element out of range"));
938 range_low -= low_bound;
939 range_high -= low_bound;
940 for (; range_low <= range_high; range_low++)
942 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
943 if (gdbarch_bits_big_endian (current_gdbarch))
944 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
945 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
952 argvec = (struct value **) alloca (sizeof (struct value *) * nargs);
953 for (tem = 0; tem < nargs; tem++)
955 /* Ensure that array expressions are coerced into pointer objects. */
956 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
958 if (noside == EVAL_SKIP)
960 return value_array (tem2, tem3, argvec);
964 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
966 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
968 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
969 if (noside == EVAL_SKIP)
971 return value_slice (array, lowbound, upper - lowbound + 1);
974 case TERNOP_SLICE_COUNT:
976 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
978 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
980 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
981 return value_slice (array, lowbound, length);
985 /* Skip third and second args to evaluate the first one. */
986 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
987 if (value_logical_not (arg1))
989 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
990 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
994 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
995 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
999 case OP_OBJC_SELECTOR:
1000 { /* Objective C @selector operator. */
1001 char *sel = &exp->elts[pc + 2].string;
1002 int len = longest_to_int (exp->elts[pc + 1].longconst);
1003 struct type *selector_type;
1005 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1006 if (noside == EVAL_SKIP)
1010 sel[len] = 0; /* Make sure it's terminated. */
1012 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1013 return value_from_longest (selector_type, lookup_child_selector (sel));
1016 case OP_OBJC_MSGCALL:
1017 { /* Objective C message (method) call. */
1019 static CORE_ADDR responds_selector = 0;
1020 static CORE_ADDR method_selector = 0;
1022 CORE_ADDR selector = 0;
1024 int struct_return = 0;
1025 int sub_no_side = 0;
1027 static struct value *msg_send = NULL;
1028 static struct value *msg_send_stret = NULL;
1029 static int gnu_runtime = 0;
1031 struct value *target = NULL;
1032 struct value *method = NULL;
1033 struct value *called_method = NULL;
1035 struct type *selector_type = NULL;
1036 struct type *long_type;
1038 struct value *ret = NULL;
1041 selector = exp->elts[pc + 1].longconst;
1042 nargs = exp->elts[pc + 2].longconst;
1043 argvec = (struct value **) alloca (sizeof (struct value *)
1048 long_type = builtin_type (exp->gdbarch)->builtin_long;
1049 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1051 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1052 sub_no_side = EVAL_NORMAL;
1054 sub_no_side = noside;
1056 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1058 if (value_as_long (target) == 0)
1059 return value_from_longest (long_type, 0);
1061 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1064 /* Find the method dispatch (Apple runtime) or method lookup
1065 (GNU runtime) function for Objective-C. These will be used
1066 to lookup the symbol information for the method. If we
1067 can't find any symbol information, then we'll use these to
1068 call the method, otherwise we can call the method
1069 directly. The msg_send_stret function is used in the special
1070 case of a method that returns a structure (Apple runtime
1074 struct type *type = selector_type;
1075 type = lookup_function_type (type);
1076 type = lookup_pointer_type (type);
1077 type = lookup_function_type (type);
1078 type = lookup_pointer_type (type);
1080 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1082 = find_function_in_inferior ("objc_msg_lookup", NULL);
1084 msg_send = value_from_pointer (type, value_as_address (msg_send));
1085 msg_send_stret = value_from_pointer (type,
1086 value_as_address (msg_send_stret));
1090 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1091 /* Special dispatcher for methods returning structs */
1093 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1096 /* Verify the target object responds to this method. The
1097 standard top-level 'Object' class uses a different name for
1098 the verification method than the non-standard, but more
1099 often used, 'NSObject' class. Make sure we check for both. */
1101 responds_selector = lookup_child_selector ("respondsToSelector:");
1102 if (responds_selector == 0)
1103 responds_selector = lookup_child_selector ("respondsTo:");
1105 if (responds_selector == 0)
1106 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1108 method_selector = lookup_child_selector ("methodForSelector:");
1109 if (method_selector == 0)
1110 method_selector = lookup_child_selector ("methodFor:");
1112 if (method_selector == 0)
1113 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1115 /* Call the verification method, to make sure that the target
1116 class implements the desired method. */
1118 argvec[0] = msg_send;
1120 argvec[2] = value_from_longest (long_type, responds_selector);
1121 argvec[3] = value_from_longest (long_type, selector);
1124 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1127 /* Function objc_msg_lookup returns a pointer. */
1129 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1131 if (value_as_long (ret) == 0)
1132 error (_("Target does not respond to this message selector."));
1134 /* Call "methodForSelector:" method, to get the address of a
1135 function method that implements this selector for this
1136 class. If we can find a symbol at that address, then we
1137 know the return type, parameter types etc. (that's a good
1140 argvec[0] = msg_send;
1142 argvec[2] = value_from_longest (long_type, method_selector);
1143 argvec[3] = value_from_longest (long_type, selector);
1146 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1150 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1153 /* ret should now be the selector. */
1155 addr = value_as_long (ret);
1158 struct symbol *sym = NULL;
1159 /* Is it a high_level symbol? */
1161 sym = find_pc_function (addr);
1163 method = value_of_variable (sym, 0);
1166 /* If we found a method with symbol information, check to see
1167 if it returns a struct. Otherwise assume it doesn't. */
1173 struct type *val_type;
1175 funaddr = find_function_addr (method, &val_type);
1177 b = block_for_pc (funaddr);
1179 CHECK_TYPEDEF (val_type);
1181 if ((val_type == NULL)
1182 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1184 if (expect_type != NULL)
1185 val_type = expect_type;
1188 struct_return = using_struct_return (value_type (method), val_type);
1190 else if (expect_type != NULL)
1192 struct_return = using_struct_return (NULL,
1193 check_typedef (expect_type));
1196 /* Found a function symbol. Now we will substitute its
1197 value in place of the message dispatcher (obj_msgSend),
1198 so that we call the method directly instead of thru
1199 the dispatcher. The main reason for doing this is that
1200 we can now evaluate the return value and parameter values
1201 according to their known data types, in case we need to
1202 do things like promotion, dereferencing, special handling
1203 of structs and doubles, etc.
1205 We want to use the type signature of 'method', but still
1206 jump to objc_msgSend() or objc_msgSend_stret() to better
1207 mimic the behavior of the runtime. */
1211 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1212 error (_("method address has symbol information with non-function type; skipping"));
1214 set_value_address (method, value_as_address (msg_send_stret));
1216 set_value_address (method, value_as_address (msg_send));
1217 called_method = method;
1222 called_method = msg_send_stret;
1224 called_method = msg_send;
1227 if (noside == EVAL_SKIP)
1230 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1232 /* If the return type doesn't look like a function type,
1233 call an error. This can happen if somebody tries to
1234 turn a variable into a function call. This is here
1235 because people often want to call, eg, strcmp, which
1236 gdb doesn't know is a function. If gdb isn't asked for
1237 it's opinion (ie. through "whatis"), it won't offer
1240 struct type *type = value_type (called_method);
1241 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1242 type = TYPE_TARGET_TYPE (type);
1243 type = TYPE_TARGET_TYPE (type);
1247 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1248 return allocate_value (expect_type);
1250 return allocate_value (type);
1253 error (_("Expression of type other than \"method returning ...\" used as a method"));
1256 /* Now depending on whether we found a symbol for the method,
1257 we will either call the runtime dispatcher or the method
1260 argvec[0] = called_method;
1262 argvec[2] = value_from_longest (long_type, selector);
1263 /* User-supplied arguments. */
1264 for (tem = 0; tem < nargs; tem++)
1265 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1266 argvec[tem + 3] = 0;
1268 if (gnu_runtime && (method != NULL))
1270 /* Function objc_msg_lookup returns a pointer. */
1271 deprecated_set_value_type (argvec[0],
1272 lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
1273 argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1276 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1283 op = exp->elts[*pos].opcode;
1284 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1285 /* Allocate arg vector, including space for the function to be
1286 called in argvec[0] and a terminating NULL */
1287 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
1288 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1291 /* First, evaluate the structure into arg2 */
1294 if (noside == EVAL_SKIP)
1297 if (op == STRUCTOP_MEMBER)
1299 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1303 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1306 /* If the function is a virtual function, then the
1307 aggregate value (providing the structure) plays
1308 its part by providing the vtable. Otherwise,
1309 it is just along for the ride: call the function
1312 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1314 if (TYPE_CODE (check_typedef (value_type (arg1)))
1315 != TYPE_CODE_METHODPTR)
1316 error (_("Non-pointer-to-member value used in pointer-to-member "
1319 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1321 struct type *method_type = check_typedef (value_type (arg1));
1322 arg1 = value_zero (method_type, not_lval);
1325 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1327 /* Now, say which argument to start evaluating from */
1330 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1332 /* Hair for method invocations */
1336 /* First, evaluate the structure into arg2 */
1338 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1339 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1340 if (noside == EVAL_SKIP)
1343 if (op == STRUCTOP_STRUCT)
1345 /* If v is a variable in a register, and the user types
1346 v.method (), this will produce an error, because v has
1349 A possible way around this would be to allocate a
1350 copy of the variable on the stack, copy in the
1351 contents, call the function, and copy out the
1352 contents. I.e. convert this from call by reference
1353 to call by copy-return (or whatever it's called).
1354 However, this does not work because it is not the
1355 same: the method being called could stash a copy of
1356 the address, and then future uses through that address
1357 (after the method returns) would be expected to
1358 use the variable itself, not some copy of it. */
1359 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1363 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1365 /* Now, say which argument to start evaluating from */
1370 /* Non-method function call */
1372 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1374 type = value_type (argvec[0]);
1375 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1376 type = TYPE_TARGET_TYPE (type);
1377 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1379 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1381 /* pai: FIXME This seems to be coercing arguments before
1382 * overload resolution has been done! */
1383 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
1389 /* Evaluate arguments */
1390 for (; tem <= nargs; tem++)
1392 /* Ensure that array expressions are coerced into pointer objects. */
1393 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1396 /* signal end of arglist */
1399 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1401 int static_memfuncp;
1404 /* Method invocation : stuff "this" as first parameter */
1406 /* Name of method from expression */
1407 strcpy (tstr, &exp->elts[pc2 + 2].string);
1409 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1411 /* Language is C++, do some overload resolution before evaluation */
1412 struct value *valp = NULL;
1414 /* Prepare list of argument types for overload resolution */
1415 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1416 for (ix = 1; ix <= nargs; ix++)
1417 arg_types[ix - 1] = value_type (argvec[ix]);
1419 (void) find_overload_match (arg_types, nargs, tstr,
1420 1 /* method */ , 0 /* strict match */ ,
1421 &arg2 /* the object */ , NULL,
1422 &valp, NULL, &static_memfuncp);
1425 argvec[1] = arg2; /* the ``this'' pointer */
1426 argvec[0] = valp; /* use the method found after overload resolution */
1429 /* Non-C++ case -- or no overload resolution */
1431 struct value *temp = arg2;
1432 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1434 op == STRUCTOP_STRUCT
1435 ? "structure" : "structure pointer");
1436 /* value_struct_elt updates temp with the correct value
1437 of the ``this'' pointer if necessary, so modify argvec[1] to
1438 reflect any ``this'' changes. */
1439 arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
1440 value_address (temp)
1441 + value_embedded_offset (temp));
1442 argvec[1] = arg2; /* the ``this'' pointer */
1445 if (static_memfuncp)
1447 argvec[1] = argvec[0];
1452 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1457 else if (op == OP_VAR_VALUE)
1459 /* Non-member function being called */
1460 /* fn: This can only be done for C++ functions. A C-style function
1461 in a C++ program, for instance, does not have the fields that
1462 are expected here */
1464 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1466 /* Language is C++, do some overload resolution before evaluation */
1467 struct symbol *symp;
1469 /* Prepare list of argument types for overload resolution */
1470 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1471 for (ix = 1; ix <= nargs; ix++)
1472 arg_types[ix - 1] = value_type (argvec[ix]);
1474 (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
1475 0 /* not method */ , 0 /* strict match */ ,
1476 NULL, exp->elts[save_pos1+2].symbol /* the function */ ,
1479 /* Now fix the expression being evaluated */
1480 exp->elts[save_pos1+2].symbol = symp;
1481 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1485 /* Not C++, or no overload resolution allowed */
1486 /* nothing to be done; argvec already correctly set up */
1491 /* It is probably a C-style function */
1492 /* nothing to be done; argvec already correctly set up */
1497 if (noside == EVAL_SKIP)
1499 if (argvec[0] == NULL)
1500 error (_("Cannot evaluate function -- may be inlined"));
1501 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1503 /* If the return type doesn't look like a function type, call an
1504 error. This can happen if somebody tries to turn a variable into
1505 a function call. This is here because people often want to
1506 call, eg, strcmp, which gdb doesn't know is a function. If
1507 gdb isn't asked for it's opinion (ie. through "whatis"),
1508 it won't offer it. */
1510 struct type *ftype =
1511 TYPE_TARGET_TYPE (value_type (argvec[0]));
1514 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
1516 error (_("Expression of type other than \"Function returning ...\" used as function"));
1518 if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_INTERNAL_FUNCTION)
1519 return call_internal_function (argvec[0], nargs, argvec + 1);
1521 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1522 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1524 case OP_F77_UNDETERMINED_ARGLIST:
1526 /* Remember that in F77, functions, substring ops and
1527 array subscript operations cannot be disambiguated
1528 at parse time. We have made all array subscript operations,
1529 substring operations as well as function calls come here
1530 and we now have to discover what the heck this thing actually was.
1531 If it is a function, we process just as if we got an OP_FUNCALL. */
1533 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1536 /* First determine the type code we are dealing with. */
1537 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1538 type = check_typedef (value_type (arg1));
1539 code = TYPE_CODE (type);
1541 if (code == TYPE_CODE_PTR)
1543 /* Fortran always passes variable to subroutines as pointer.
1544 So we need to look into its target type to see if it is
1545 array, string or function. If it is, we need to switch
1546 to the target value the original one points to. */
1547 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1549 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1550 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1551 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1553 arg1 = value_ind (arg1);
1554 type = check_typedef (value_type (arg1));
1555 code = TYPE_CODE (type);
1561 case TYPE_CODE_ARRAY:
1562 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1563 return value_f90_subarray (arg1, exp, pos, noside);
1565 goto multi_f77_subscript;
1567 case TYPE_CODE_STRING:
1568 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1569 return value_f90_subarray (arg1, exp, pos, noside);
1572 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1573 return value_subscript (arg1, arg2);
1577 case TYPE_CODE_FUNC:
1578 /* It's a function call. */
1579 /* Allocate arg vector, including space for the function to be
1580 called in argvec[0] and a terminating NULL */
1581 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
1584 for (; tem <= nargs; tem++)
1585 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1586 argvec[tem] = 0; /* signal end of arglist */
1590 error (_("Cannot perform substring on this type"));
1594 /* We have a complex number, There should be 2 floating
1595 point numbers that compose it */
1597 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1598 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1600 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1602 case STRUCTOP_STRUCT:
1603 tem = longest_to_int (exp->elts[pc + 1].longconst);
1604 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1605 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1606 if (noside == EVAL_SKIP)
1608 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1609 return value_zero (lookup_struct_elt_type (value_type (arg1),
1610 &exp->elts[pc + 2].string,
1615 struct value *temp = arg1;
1616 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1621 tem = longest_to_int (exp->elts[pc + 1].longconst);
1622 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1623 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1624 if (noside == EVAL_SKIP)
1627 /* JYG: if print object is on we need to replace the base type
1628 with rtti type in order to continue on with successful
1629 lookup of member / method only available in the rtti type. */
1631 struct type *type = value_type (arg1);
1632 struct type *real_type;
1633 int full, top, using_enc;
1634 struct value_print_options opts;
1636 get_user_print_options (&opts);
1637 if (opts.objectprint && TYPE_TARGET_TYPE(type) &&
1638 (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1640 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1643 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1644 real_type = lookup_pointer_type (real_type);
1646 real_type = lookup_reference_type (real_type);
1648 arg1 = value_cast (real_type, arg1);
1653 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1654 return value_zero (lookup_struct_elt_type (value_type (arg1),
1655 &exp->elts[pc + 2].string,
1660 struct value *temp = arg1;
1661 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1662 NULL, "structure pointer");
1665 case STRUCTOP_MEMBER:
1667 if (op == STRUCTOP_MEMBER)
1668 arg1 = evaluate_subexp_for_address (exp, pos, noside);
1670 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1672 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1674 if (noside == EVAL_SKIP)
1677 type = check_typedef (value_type (arg2));
1678 switch (TYPE_CODE (type))
1680 case TYPE_CODE_METHODPTR:
1681 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1682 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
1685 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
1686 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
1687 return value_ind (arg2);
1690 case TYPE_CODE_MEMBERPTR:
1691 /* Now, convert these values to an address. */
1692 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
1695 mem_offset = value_as_long (arg2);
1697 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
1698 value_as_long (arg1) + mem_offset);
1699 return value_ind (arg3);
1702 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1706 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1707 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1708 if (noside == EVAL_SKIP)
1710 if (binop_user_defined_p (op, arg1, arg2))
1711 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1713 return value_concat (arg1, arg2);
1716 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1717 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1719 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1721 if (binop_user_defined_p (op, arg1, arg2))
1722 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1724 return value_assign (arg1, arg2);
1726 case BINOP_ASSIGN_MODIFY:
1728 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1729 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1730 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1732 op = exp->elts[pc + 1].opcode;
1733 if (binop_user_defined_p (op, arg1, arg2))
1734 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
1735 else if (op == BINOP_ADD && ptrmath_type_p (value_type (arg1)))
1736 arg2 = value_ptradd (arg1, arg2);
1737 else if (op == BINOP_SUB && ptrmath_type_p (value_type (arg1)))
1738 arg2 = value_ptrsub (arg1, arg2);
1741 struct value *tmp = arg1;
1743 /* For shift and integer exponentiation operations,
1744 only promote the first argument. */
1745 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1746 && is_integral_type (value_type (arg2)))
1747 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
1749 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
1751 arg2 = value_binop (tmp, arg2, op);
1753 return value_assign (arg1, arg2);
1756 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1757 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1758 if (noside == EVAL_SKIP)
1760 if (binop_user_defined_p (op, arg1, arg2))
1761 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1762 else if (ptrmath_type_p (value_type (arg1)))
1763 return value_ptradd (arg1, arg2);
1764 else if (ptrmath_type_p (value_type (arg2)))
1765 return value_ptradd (arg2, arg1);
1768 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1769 return value_binop (arg1, arg2, BINOP_ADD);
1773 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1774 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1775 if (noside == EVAL_SKIP)
1777 if (binop_user_defined_p (op, arg1, arg2))
1778 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1779 else if (ptrmath_type_p (value_type (arg1)))
1781 if (ptrmath_type_p (value_type (arg2)))
1783 /* FIXME -- should be ptrdiff_t */
1784 type = builtin_type (exp->gdbarch)->builtin_long;
1785 return value_from_longest (type, value_ptrdiff (arg1, arg2));
1788 return value_ptrsub (arg1, arg2);
1792 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1793 return value_binop (arg1, arg2, BINOP_SUB);
1804 case BINOP_BITWISE_AND:
1805 case BINOP_BITWISE_IOR:
1806 case BINOP_BITWISE_XOR:
1807 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1808 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1809 if (noside == EVAL_SKIP)
1811 if (binop_user_defined_p (op, arg1, arg2))
1812 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1815 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1816 fudge arg2 to avoid division-by-zero, the caller is
1817 (theoretically) only looking for the type of the result. */
1818 if (noside == EVAL_AVOID_SIDE_EFFECTS
1819 /* ??? Do we really want to test for BINOP_MOD here?
1820 The implementation of value_binop gives it a well-defined
1823 || op == BINOP_INTDIV
1826 && value_logical_not (arg2))
1828 struct value *v_one, *retval;
1830 v_one = value_one (value_type (arg2), not_lval);
1831 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
1832 retval = value_binop (arg1, v_one, op);
1837 /* For shift and integer exponentiation operations,
1838 only promote the first argument. */
1839 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1840 && is_integral_type (value_type (arg2)))
1841 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
1843 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1845 return value_binop (arg1, arg2, op);
1850 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1851 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1852 if (noside == EVAL_SKIP)
1854 error (_("':' operator used in invalid context"));
1856 case BINOP_SUBSCRIPT:
1857 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1858 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1859 if (noside == EVAL_SKIP)
1861 if (binop_user_defined_p (op, arg1, arg2))
1862 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1865 /* If the user attempts to subscript something that is not an
1866 array or pointer type (like a plain int variable for example),
1867 then report this as an error. */
1869 arg1 = coerce_ref (arg1);
1870 type = check_typedef (value_type (arg1));
1871 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
1872 && TYPE_CODE (type) != TYPE_CODE_PTR)
1874 if (TYPE_NAME (type))
1875 error (_("cannot subscript something of type `%s'"),
1878 error (_("cannot subscript requested type"));
1881 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1882 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
1884 return value_subscript (arg1, arg2);
1888 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1889 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1890 if (noside == EVAL_SKIP)
1892 type = language_bool_type (exp->language_defn, exp->gdbarch);
1893 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
1895 case MULTI_SUBSCRIPT:
1897 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1898 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1901 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1902 /* FIXME: EVAL_SKIP handling may not be correct. */
1903 if (noside == EVAL_SKIP)
1914 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1915 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1917 /* If the user attempts to subscript something that has no target
1918 type (like a plain int variable for example), then report this
1921 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
1924 arg1 = value_zero (type, VALUE_LVAL (arg1));
1930 error (_("cannot subscript something of type `%s'"),
1931 TYPE_NAME (value_type (arg1)));
1935 if (binop_user_defined_p (op, arg1, arg2))
1937 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
1941 arg1 = coerce_ref (arg1);
1942 type = check_typedef (value_type (arg1));
1944 switch (TYPE_CODE (type))
1947 case TYPE_CODE_ARRAY:
1948 case TYPE_CODE_STRING:
1949 arg1 = value_subscript (arg1, arg2);
1952 case TYPE_CODE_BITSTRING:
1953 type = language_bool_type (exp->language_defn, exp->gdbarch);
1954 arg1 = value_bitstring_subscript (type, arg1, arg2);
1958 if (TYPE_NAME (type))
1959 error (_("cannot subscript something of type `%s'"),
1962 error (_("cannot subscript requested type"));
1968 multi_f77_subscript:
1970 int subscript_array[MAX_FORTRAN_DIMS];
1971 int array_size_array[MAX_FORTRAN_DIMS];
1972 int ndimensions = 1, i;
1973 struct type *tmp_type;
1974 int offset_item; /* The array offset where the item lives */
1976 if (nargs > MAX_FORTRAN_DIMS)
1977 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
1979 tmp_type = check_typedef (value_type (arg1));
1980 ndimensions = calc_f77_array_dims (type);
1982 if (nargs != ndimensions)
1983 error (_("Wrong number of subscripts"));
1985 gdb_assert (nargs > 0);
1987 /* Now that we know we have a legal array subscript expression
1988 let us actually find out where this element exists in the array. */
1991 /* Take array indices left to right */
1992 for (i = 0; i < nargs; i++)
1994 /* Evaluate each subscript, It must be a legal integer in F77 */
1995 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1997 /* Fill in the subscript and array size arrays */
1999 subscript_array[i] = value_as_long (arg2);
2002 /* Internal type of array is arranged right to left */
2003 for (i = 0; i < nargs; i++)
2005 upper = f77_get_upperbound (tmp_type);
2006 lower = f77_get_lowerbound (tmp_type);
2008 array_size_array[nargs - i - 1] = upper - lower + 1;
2010 /* Zero-normalize subscripts so that offsetting will work. */
2012 subscript_array[nargs - i - 1] -= lower;
2014 /* If we are at the bottom of a multidimensional
2015 array type then keep a ptr to the last ARRAY
2016 type around for use when calling value_subscript()
2017 below. This is done because we pretend to value_subscript
2018 that we actually have a one-dimensional array
2019 of base element type that we apply a simple
2023 tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
2026 /* Now let us calculate the offset for this item */
2028 offset_item = subscript_array[ndimensions - 1];
2030 for (i = ndimensions - 1; i > 0; --i)
2032 array_size_array[i - 1] * offset_item + subscript_array[i - 1];
2034 /* Construct a value node with the value of the offset */
2036 arg2 = value_from_longest (builtin_type_int32, offset_item);
2038 /* Let us now play a dirty trick: we will take arg1
2039 which is a value node pointing to the topmost level
2040 of the multidimensional array-set and pretend
2041 that it is actually a array of the final element
2042 type, this will ensure that value_subscript()
2043 returns the correct type value */
2045 deprecated_set_value_type (arg1, tmp_type);
2046 return value_subscripted_rvalue (arg1, arg2, 0);
2049 case BINOP_LOGICAL_AND:
2050 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2051 if (noside == EVAL_SKIP)
2053 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2058 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2061 if (binop_user_defined_p (op, arg1, arg2))
2063 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2064 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2068 tem = value_logical_not (arg1);
2069 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2070 (tem ? EVAL_SKIP : noside));
2071 type = language_bool_type (exp->language_defn, exp->gdbarch);
2072 return value_from_longest (type,
2073 (LONGEST) (!tem && !value_logical_not (arg2)));
2076 case BINOP_LOGICAL_OR:
2077 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2078 if (noside == EVAL_SKIP)
2080 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2085 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2088 if (binop_user_defined_p (op, arg1, arg2))
2090 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2091 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2095 tem = value_logical_not (arg1);
2096 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2097 (!tem ? EVAL_SKIP : noside));
2098 type = language_bool_type (exp->language_defn, exp->gdbarch);
2099 return value_from_longest (type,
2100 (LONGEST) (!tem || !value_logical_not (arg2)));
2104 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2105 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2106 if (noside == EVAL_SKIP)
2108 if (binop_user_defined_p (op, arg1, arg2))
2110 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2114 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2115 tem = value_equal (arg1, arg2);
2116 type = language_bool_type (exp->language_defn, exp->gdbarch);
2117 return value_from_longest (type, (LONGEST) tem);
2120 case BINOP_NOTEQUAL:
2121 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2122 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2123 if (noside == EVAL_SKIP)
2125 if (binop_user_defined_p (op, arg1, arg2))
2127 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2131 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2132 tem = value_equal (arg1, arg2);
2133 type = language_bool_type (exp->language_defn, exp->gdbarch);
2134 return value_from_longest (type, (LONGEST) ! tem);
2138 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2139 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2140 if (noside == EVAL_SKIP)
2142 if (binop_user_defined_p (op, arg1, arg2))
2144 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2148 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2149 tem = value_less (arg1, arg2);
2150 type = language_bool_type (exp->language_defn, exp->gdbarch);
2151 return value_from_longest (type, (LONGEST) tem);
2155 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2156 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2157 if (noside == EVAL_SKIP)
2159 if (binop_user_defined_p (op, arg1, arg2))
2161 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2165 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2166 tem = value_less (arg2, arg1);
2167 type = language_bool_type (exp->language_defn, exp->gdbarch);
2168 return value_from_longest (type, (LONGEST) tem);
2172 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2173 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2174 if (noside == EVAL_SKIP)
2176 if (binop_user_defined_p (op, arg1, arg2))
2178 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2182 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2183 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2184 type = language_bool_type (exp->language_defn, exp->gdbarch);
2185 return value_from_longest (type, (LONGEST) tem);
2189 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2190 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2191 if (noside == EVAL_SKIP)
2193 if (binop_user_defined_p (op, arg1, arg2))
2195 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2199 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2200 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2201 type = language_bool_type (exp->language_defn, exp->gdbarch);
2202 return value_from_longest (type, (LONGEST) tem);
2206 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2207 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2208 if (noside == EVAL_SKIP)
2210 type = check_typedef (value_type (arg2));
2211 if (TYPE_CODE (type) != TYPE_CODE_INT)
2212 error (_("Non-integral right operand for \"@\" operator."));
2213 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2215 return allocate_repeat_value (value_type (arg1),
2216 longest_to_int (value_as_long (arg2)));
2219 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2222 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2223 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2226 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2227 if (noside == EVAL_SKIP)
2229 if (unop_user_defined_p (op, arg1))
2230 return value_x_unop (arg1, op, noside);
2233 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2234 return value_pos (arg1);
2238 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2239 if (noside == EVAL_SKIP)
2241 if (unop_user_defined_p (op, arg1))
2242 return value_x_unop (arg1, op, noside);
2245 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2246 return value_neg (arg1);
2249 case UNOP_COMPLEMENT:
2250 /* C++: check for and handle destructor names. */
2251 op = exp->elts[*pos].opcode;
2253 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2254 if (noside == EVAL_SKIP)
2256 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2257 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2260 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2261 return value_complement (arg1);
2264 case UNOP_LOGICAL_NOT:
2265 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2266 if (noside == EVAL_SKIP)
2268 if (unop_user_defined_p (op, arg1))
2269 return value_x_unop (arg1, op, noside);
2272 type = language_bool_type (exp->language_defn, exp->gdbarch);
2273 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2277 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2278 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2279 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2280 type = check_typedef (value_type (arg1));
2281 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2282 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2283 error (_("Attempt to dereference pointer to member without an object"));
2284 if (noside == EVAL_SKIP)
2286 if (unop_user_defined_p (op, arg1))
2287 return value_x_unop (arg1, op, noside);
2288 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2290 type = check_typedef (value_type (arg1));
2291 if (TYPE_CODE (type) == TYPE_CODE_PTR
2292 || TYPE_CODE (type) == TYPE_CODE_REF
2293 /* In C you can dereference an array to get the 1st elt. */
2294 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2296 return value_zero (TYPE_TARGET_TYPE (type),
2298 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2299 /* GDB allows dereferencing an int. */
2300 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2303 error (_("Attempt to take contents of a non-pointer value."));
2306 /* Allow * on an integer so we can cast it to whatever we want.
2307 This returns an int, which seems like the most C-like thing to
2308 do. "long long" variables are rare enough that
2309 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2310 if (TYPE_CODE (type) == TYPE_CODE_INT)
2311 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2312 (CORE_ADDR) value_as_address (arg1));
2313 return value_ind (arg1);
2316 /* C++: check for and handle pointer to members. */
2318 op = exp->elts[*pos].opcode;
2320 if (noside == EVAL_SKIP)
2322 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2327 struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
2332 if (noside == EVAL_SKIP)
2334 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2337 return evaluate_subexp_for_sizeof (exp, pos);
2341 type = exp->elts[pc + 1].type;
2342 arg1 = evaluate_subexp (type, exp, pos, noside);
2343 if (noside == EVAL_SKIP)
2345 if (type != value_type (arg1))
2346 arg1 = value_cast (type, arg1);
2351 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2352 if (noside == EVAL_SKIP)
2354 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2355 return value_zero (exp->elts[pc + 1].type, lval_memory);
2357 return value_at_lazy (exp->elts[pc + 1].type,
2358 value_as_address (arg1));
2360 case UNOP_MEMVAL_TLS:
2362 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2363 if (noside == EVAL_SKIP)
2365 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2366 return value_zero (exp->elts[pc + 2].type, lval_memory);
2370 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2371 value_as_address (arg1));
2372 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2375 case UNOP_PREINCREMENT:
2376 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2377 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2379 else if (unop_user_defined_p (op, arg1))
2381 return value_x_unop (arg1, op, noside);
2385 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2386 if (ptrmath_type_p (value_type (arg1)))
2387 arg2 = value_ptradd (arg1, arg2);
2390 struct value *tmp = arg1;
2391 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2392 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2395 return value_assign (arg1, arg2);
2398 case UNOP_PREDECREMENT:
2399 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2400 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2402 else if (unop_user_defined_p (op, arg1))
2404 return value_x_unop (arg1, op, noside);
2408 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2409 if (ptrmath_type_p (value_type (arg1)))
2410 arg2 = value_ptrsub (arg1, arg2);
2413 struct value *tmp = arg1;
2414 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2415 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2418 return value_assign (arg1, arg2);
2421 case UNOP_POSTINCREMENT:
2422 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2423 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2425 else if (unop_user_defined_p (op, arg1))
2427 return value_x_unop (arg1, op, noside);
2431 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2432 if (ptrmath_type_p (value_type (arg1)))
2433 arg2 = value_ptradd (arg1, arg2);
2436 struct value *tmp = arg1;
2437 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2438 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2441 value_assign (arg1, arg2);
2445 case UNOP_POSTDECREMENT:
2446 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2447 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2449 else if (unop_user_defined_p (op, arg1))
2451 return value_x_unop (arg1, op, noside);
2455 arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
2456 if (ptrmath_type_p (value_type (arg1)))
2457 arg2 = value_ptrsub (arg1, arg2);
2460 struct value *tmp = arg1;
2461 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2462 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2465 value_assign (arg1, arg2);
2471 return value_of_this (1);
2475 return value_of_local ("self", 1);
2478 /* The value is not supposed to be used. This is here to make it
2479 easier to accommodate expressions that contain types. */
2481 if (noside == EVAL_SKIP)
2483 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2485 struct type *type = exp->elts[pc + 1].type;
2486 /* If this is a typedef, then find its immediate target. We
2487 use check_typedef to resolve stubs, but we ignore its
2488 result because we do not want to dig past all
2490 check_typedef (type);
2491 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2492 type = TYPE_TARGET_TYPE (type);
2493 return allocate_value (type);
2496 error (_("Attempt to use a type name as an expression"));
2499 /* Removing this case and compiling with gcc -Wall reveals that
2500 a lot of cases are hitting this case. Some of these should
2501 probably be removed from expression.h; others are legitimate
2502 expressions which are (apparently) not fully implemented.
2504 If there are any cases landing here which mean a user error,
2505 then they should be separate cases, with more descriptive
2509 GDB does not (yet) know how to evaluate that kind of expression"));
2513 return value_from_longest (builtin_type_int8, (LONGEST) 1);
2516 /* Evaluate a subexpression of EXP, at index *POS,
2517 and return the address of that subexpression.
2518 Advance *POS over the subexpression.
2519 If the subexpression isn't an lvalue, get an error.
2520 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2521 then only the type of the result need be correct. */
2523 static struct value *
2524 evaluate_subexp_for_address (struct expression *exp, int *pos,
2534 op = exp->elts[pc].opcode;
2540 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2542 /* We can't optimize out "&*" if there's a user-defined operator*. */
2543 if (unop_user_defined_p (op, x))
2545 x = value_x_unop (x, op, noside);
2546 goto default_case_after_eval;
2553 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2554 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2557 var = exp->elts[pc + 2].symbol;
2559 /* C++: The "address" of a reference should yield the address
2560 * of the object pointed to. Let value_addr() deal with it. */
2561 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2565 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2568 lookup_pointer_type (SYMBOL_TYPE (var));
2569 enum address_class sym_class = SYMBOL_CLASS (var);
2571 if (sym_class == LOC_CONST
2572 || sym_class == LOC_CONST_BYTES
2573 || sym_class == LOC_REGISTER)
2574 error (_("Attempt to take address of register or constant."));
2577 value_zero (type, not_lval);
2580 return address_of_variable (var, exp->elts[pc + 1].block);
2583 tem = longest_to_int (exp->elts[pc + 2].longconst);
2584 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2585 x = value_aggregate_elt (exp->elts[pc + 1].type,
2586 &exp->elts[pc + 3].string,
2589 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2594 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2595 default_case_after_eval:
2596 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2598 struct type *type = check_typedef (value_type (x));
2600 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2601 return value_zero (lookup_pointer_type (value_type (x)),
2603 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2604 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2607 error (_("Attempt to take address of value not located in memory."));
2609 return value_addr (x);
2613 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2614 When used in contexts where arrays will be coerced anyway, this is
2615 equivalent to `evaluate_subexp' but much faster because it avoids
2616 actually fetching array contents (perhaps obsolete now that we have
2619 Note that we currently only do the coercion for C expressions, where
2620 arrays are zero based and the coercion is correct. For other languages,
2621 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2622 to decide if coercion is appropriate.
2627 evaluate_subexp_with_coercion (struct expression *exp,
2628 int *pos, enum noside noside)
2637 op = exp->elts[pc].opcode;
2642 var = exp->elts[pc + 2].symbol;
2643 type = check_typedef (SYMBOL_TYPE (var));
2644 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
2645 && CAST_IS_CONVERSION)
2648 val = address_of_variable (var, exp->elts[pc + 1].block);
2649 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2655 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2659 /* Evaluate a subexpression of EXP, at index *POS,
2660 and return a value for the size of that subexpression.
2661 Advance *POS over the subexpression. */
2663 static struct value *
2664 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
2666 /* FIXME: This should be size_t. */
2667 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2674 op = exp->elts[pc].opcode;
2678 /* This case is handled specially
2679 so that we avoid creating a value for the result type.
2680 If the result type is very big, it's desirable not to
2681 create a value unnecessarily. */
2684 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2685 type = check_typedef (value_type (val));
2686 if (TYPE_CODE (type) != TYPE_CODE_PTR
2687 && TYPE_CODE (type) != TYPE_CODE_REF
2688 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
2689 error (_("Attempt to take contents of a non-pointer value."));
2690 type = check_typedef (TYPE_TARGET_TYPE (type));
2691 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2695 type = check_typedef (exp->elts[pc + 1].type);
2696 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2700 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
2702 value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2705 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2706 return value_from_longest (size_type,
2707 (LONGEST) TYPE_LENGTH (value_type (val)));
2711 /* Parse a type expression in the string [P..P+LENGTH). */
2714 parse_and_eval_type (char *p, int length)
2716 char *tmp = (char *) alloca (length + 4);
2717 struct expression *expr;
2719 memcpy (tmp + 1, p, length);
2720 tmp[length + 1] = ')';
2721 tmp[length + 2] = '0';
2722 tmp[length + 3] = '\0';
2723 expr = parse_expression (tmp);
2724 if (expr->elts[0].opcode != UNOP_CAST)
2725 error (_("Internal error in eval_type."));
2726 return expr->elts[1].type;
2730 calc_f77_array_dims (struct type *array_type)
2733 struct type *tmp_type;
2735 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
2736 error (_("Can't get dimensions for a non-array type"));
2738 tmp_type = array_type;
2740 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
2742 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)