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 char *get_label (struct expression *, int *);
61 static struct value *evaluate_struct_tuple (struct value *,
62 struct expression *, int *,
65 static LONGEST init_array_element (struct value *, struct value *,
66 struct expression *, int *, enum noside,
70 evaluate_subexp (struct type *expect_type, struct expression *exp,
71 int *pos, enum noside noside)
73 return (*exp->language_defn->la_exp_desc->evaluate_exp)
74 (expect_type, exp, pos, noside);
77 /* Parse the string EXP as a C expression, evaluate it,
78 and return the result as a number. */
81 parse_and_eval_address (char *exp)
83 struct expression *expr = parse_expression (exp);
85 struct cleanup *old_chain =
86 make_cleanup (free_current_contents, &expr);
88 addr = value_as_address (evaluate_expression (expr));
89 do_cleanups (old_chain);
93 /* Like parse_and_eval_address but takes a pointer to a char * variable
94 and advanced that variable across the characters parsed. */
97 parse_and_eval_address_1 (char **expptr)
99 struct expression *expr = parse_exp_1 (expptr, (struct block *) 0, 0);
101 struct cleanup *old_chain =
102 make_cleanup (free_current_contents, &expr);
104 addr = value_as_address (evaluate_expression (expr));
105 do_cleanups (old_chain);
109 /* Like parse_and_eval_address, but treats the value of the expression
110 as an integer, not an address, returns a LONGEST, not a CORE_ADDR */
112 parse_and_eval_long (char *exp)
114 struct expression *expr = parse_expression (exp);
116 struct cleanup *old_chain =
117 make_cleanup (free_current_contents, &expr);
119 retval = value_as_long (evaluate_expression (expr));
120 do_cleanups (old_chain);
125 parse_and_eval (char *exp)
127 struct expression *expr = parse_expression (exp);
129 struct cleanup *old_chain =
130 make_cleanup (free_current_contents, &expr);
132 val = evaluate_expression (expr);
133 do_cleanups (old_chain);
137 /* Parse up to a comma (or to a closeparen)
138 in the string EXPP as an expression, evaluate it, and return the value.
139 EXPP is advanced to point to the comma. */
142 parse_to_comma_and_eval (char **expp)
144 struct expression *expr = parse_exp_1 (expp, (struct block *) 0, 1);
146 struct cleanup *old_chain =
147 make_cleanup (free_current_contents, &expr);
149 val = evaluate_expression (expr);
150 do_cleanups (old_chain);
154 /* Evaluate an expression in internal prefix form
155 such as is constructed by parse.y.
157 See expression.h for info on the format of an expression. */
160 evaluate_expression (struct expression *exp)
163 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
166 /* Evaluate an expression, avoiding all memory references
167 and getting a value whose type alone is correct. */
170 evaluate_type (struct expression *exp)
173 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
176 /* Evaluate a subexpression, avoiding all memory references and
177 getting a value whose type alone is correct. */
180 evaluate_subexpression_type (struct expression *exp, int subexp)
182 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
185 /* Extract a field operation from an expression. If the subexpression
186 of EXP starting at *SUBEXP is not a structure dereference
187 operation, return NULL. Otherwise, return the name of the
188 dereferenced field, and advance *SUBEXP to point to the
189 subexpression of the left-hand-side of the dereference. This is
190 used when completing field names. */
193 extract_field_op (struct expression *exp, int *subexp)
197 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
198 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
200 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
201 result = &exp->elts[*subexp + 2].string;
202 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
206 /* If the next expression is an OP_LABELED, skips past it,
207 returning the label. Otherwise, does nothing and returns NULL. */
210 get_label (struct expression *exp, int *pos)
212 if (exp->elts[*pos].opcode == OP_LABELED)
215 char *name = &exp->elts[pc + 2].string;
216 int tem = longest_to_int (exp->elts[pc + 1].longconst);
217 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
224 /* This function evaluates tuples (in (the deleted) Chill) or
225 brace-initializers (in C/C++) for structure types. */
227 static struct value *
228 evaluate_struct_tuple (struct value *struct_val,
229 struct expression *exp,
230 int *pos, enum noside noside, int nargs)
232 struct type *struct_type = check_typedef (value_type (struct_val));
233 struct type *substruct_type = struct_type;
234 struct type *field_type;
241 struct value *val = NULL;
246 /* Skip past the labels, and count them. */
247 while (get_label (exp, pos) != NULL)
252 char *label = get_label (exp, &pc);
255 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
258 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
259 if (field_name != NULL && strcmp (field_name, label) == 0)
262 subfieldno = fieldno;
263 substruct_type = struct_type;
267 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
270 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
271 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
272 if ((field_name == 0 || *field_name == '\0')
273 && TYPE_CODE (field_type) == TYPE_CODE_UNION)
276 for (; variantno < TYPE_NFIELDS (field_type);
280 = TYPE_FIELD_TYPE (field_type, variantno);
281 if (TYPE_CODE (substruct_type) == TYPE_CODE_STRUCT)
284 subfieldno < TYPE_NFIELDS (substruct_type);
287 if (strcmp(TYPE_FIELD_NAME (substruct_type,
298 error (_("there is no field named %s"), label);
304 /* Unlabelled tuple element - go to next field. */
308 if (subfieldno >= TYPE_NFIELDS (substruct_type))
311 substruct_type = struct_type;
317 /* Skip static fields. */
318 while (fieldno < TYPE_NFIELDS (struct_type)
319 && field_is_static (&TYPE_FIELD (struct_type,
322 subfieldno = fieldno;
323 if (fieldno >= TYPE_NFIELDS (struct_type))
324 error (_("too many initializers"));
325 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
326 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
327 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
328 error (_("don't know which variant you want to set"));
332 /* Here, struct_type is the type of the inner struct,
333 while substruct_type is the type of the inner struct.
334 These are the same for normal structures, but a variant struct
335 contains anonymous union fields that contain substruct fields.
336 The value fieldno is the index of the top-level (normal or
337 anonymous union) field in struct_field, while the value
338 subfieldno is the index of the actual real (named inner) field
339 in substruct_type. */
341 field_type = TYPE_FIELD_TYPE (substruct_type, subfieldno);
343 val = evaluate_subexp (field_type, exp, pos, noside);
345 /* Now actually set the field in struct_val. */
347 /* Assign val to field fieldno. */
348 if (value_type (val) != field_type)
349 val = value_cast (field_type, val);
351 bitsize = TYPE_FIELD_BITSIZE (substruct_type, subfieldno);
352 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
354 bitpos += TYPE_FIELD_BITPOS (substruct_type, subfieldno);
355 addr = value_contents_writeable (struct_val) + bitpos / 8;
357 modify_field (struct_type, addr,
358 value_as_long (val), bitpos % 8, bitsize);
360 memcpy (addr, value_contents (val),
361 TYPE_LENGTH (value_type (val)));
363 while (--nlabels > 0);
368 /* Recursive helper function for setting elements of array tuples for
369 (the deleted) Chill. The target is ARRAY (which has bounds
370 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
371 and NOSIDE are as usual. Evaluates index expresions and sets the
372 specified element(s) of ARRAY to ELEMENT. Returns last index
376 init_array_element (struct value *array, struct value *element,
377 struct expression *exp, int *pos,
378 enum noside noside, LONGEST low_bound, LONGEST high_bound)
381 int element_size = TYPE_LENGTH (value_type (element));
382 if (exp->elts[*pos].opcode == BINOP_COMMA)
385 init_array_element (array, element, exp, pos, noside,
386 low_bound, high_bound);
387 return init_array_element (array, element,
388 exp, pos, noside, low_bound, high_bound);
390 else if (exp->elts[*pos].opcode == BINOP_RANGE)
394 low = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
395 high = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
396 if (low < low_bound || high > high_bound)
397 error (_("tuple range index out of range"));
398 for (index = low; index <= high; index++)
400 memcpy (value_contents_raw (array)
401 + (index - low_bound) * element_size,
402 value_contents (element), element_size);
407 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
408 if (index < low_bound || index > high_bound)
409 error (_("tuple index out of range"));
410 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
411 value_contents (element), element_size);
416 static struct value *
417 value_f90_subarray (struct value *array,
418 struct expression *exp, int *pos, enum noside noside)
421 LONGEST low_bound, high_bound;
422 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
423 enum f90_range_type range_type = longest_to_int (exp->elts[pc].longconst);
427 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
428 low_bound = TYPE_LOW_BOUND (range);
430 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
432 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
433 high_bound = TYPE_HIGH_BOUND (range);
435 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
437 return value_slice (array, low_bound, high_bound - low_bound + 1);
441 /* Promote value ARG1 as appropriate before performing a unary operation
443 If the result is not appropriate for any particular language then it
444 needs to patch this function. */
447 unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
452 *arg1 = coerce_ref (*arg1);
453 type1 = check_typedef (value_type (*arg1));
455 if (is_integral_type (type1))
457 switch (language->la_language)
460 /* Perform integral promotion for ANSI C/C++.
461 If not appropropriate for any particular language
462 it needs to modify this function. */
464 struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
465 if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
466 *arg1 = value_cast (builtin_int, *arg1);
473 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
474 operation on those two operands.
475 If the result is not appropriate for any particular language then it
476 needs to patch this function. */
479 binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
480 struct value **arg1, struct value **arg2)
482 struct type *promoted_type = NULL;
486 *arg1 = coerce_ref (*arg1);
487 *arg2 = coerce_ref (*arg2);
489 type1 = check_typedef (value_type (*arg1));
490 type2 = check_typedef (value_type (*arg2));
492 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
493 && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
494 && !is_integral_type (type1))
495 || (TYPE_CODE (type2) != TYPE_CODE_FLT
496 && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
497 && !is_integral_type (type2)))
500 if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
501 || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
503 /* No promotion required. */
505 else if (TYPE_CODE (type1) == TYPE_CODE_FLT
506 || TYPE_CODE (type2) == TYPE_CODE_FLT)
508 switch (language->la_language)
514 /* No promotion required. */
518 /* For other languages the result type is unchanged from gdb
519 version 6.7 for backward compatibility.
520 If either arg was long double, make sure that value is also long
521 double. Otherwise use double. */
522 if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch)
523 || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
524 promoted_type = builtin_type (gdbarch)->builtin_long_double;
526 promoted_type = builtin_type (gdbarch)->builtin_double;
530 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
531 && TYPE_CODE (type2) == TYPE_CODE_BOOL)
533 /* No promotion required. */
536 /* Integral operations here. */
537 /* FIXME: Also mixed integral/booleans, with result an integer. */
539 const struct builtin_type *builtin = builtin_type (gdbarch);
540 unsigned int promoted_len1 = TYPE_LENGTH (type1);
541 unsigned int promoted_len2 = TYPE_LENGTH (type2);
542 int is_unsigned1 = TYPE_UNSIGNED (type1);
543 int is_unsigned2 = TYPE_UNSIGNED (type2);
544 unsigned int result_len;
545 int unsigned_operation;
547 /* Determine type length and signedness after promotion for
549 if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int))
552 promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
554 if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
557 promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
560 if (promoted_len1 > promoted_len2)
562 unsigned_operation = is_unsigned1;
563 result_len = promoted_len1;
565 else if (promoted_len2 > promoted_len1)
567 unsigned_operation = is_unsigned2;
568 result_len = promoted_len2;
572 unsigned_operation = is_unsigned1 || is_unsigned2;
573 result_len = promoted_len1;
576 switch (language->la_language)
582 if (result_len <= TYPE_LENGTH (builtin->builtin_int))
584 promoted_type = (unsigned_operation
585 ? builtin->builtin_unsigned_int
586 : builtin->builtin_int);
588 else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
590 promoted_type = (unsigned_operation
591 ? builtin->builtin_unsigned_long
592 : builtin->builtin_long);
596 promoted_type = (unsigned_operation
597 ? builtin->builtin_unsigned_long_long
598 : builtin->builtin_long_long);
603 /* For other languages the result type is unchanged from gdb
604 version 6.7 for backward compatibility.
605 If either arg was long long, make sure that value is also long
606 long. Otherwise use long. */
607 if (unsigned_operation)
609 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
610 promoted_type = builtin->builtin_unsigned_long_long;
612 promoted_type = builtin->builtin_unsigned_long;
616 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
617 promoted_type = builtin->builtin_long_long;
619 promoted_type = builtin->builtin_long;
627 /* Promote both operands to common type. */
628 *arg1 = value_cast (promoted_type, *arg1);
629 *arg2 = value_cast (promoted_type, *arg2);
634 ptrmath_type_p (struct type *type)
636 type = check_typedef (type);
637 if (TYPE_CODE (type) == TYPE_CODE_REF)
638 type = TYPE_TARGET_TYPE (type);
640 switch (TYPE_CODE (type))
646 case TYPE_CODE_ARRAY:
647 return current_language->c_style_arrays;
655 evaluate_subexp_standard (struct type *expect_type,
656 struct expression *exp, int *pos,
661 int pc, pc2 = 0, oldpos;
662 struct value *arg1 = NULL;
663 struct value *arg2 = NULL;
667 struct value **argvec;
668 int upper, lower, retcode;
672 struct type **arg_types;
676 op = exp->elts[pc].opcode;
681 tem = longest_to_int (exp->elts[pc + 2].longconst);
682 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
683 if (noside == EVAL_SKIP)
685 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
686 &exp->elts[pc + 3].string,
689 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
694 return value_from_longest (exp->elts[pc + 1].type,
695 exp->elts[pc + 2].longconst);
699 return value_from_double (exp->elts[pc + 1].type,
700 exp->elts[pc + 2].doubleconst);
704 return value_from_decfloat (exp->elts[pc + 1].type,
705 exp->elts[pc + 2].decfloatconst);
709 if (noside == EVAL_SKIP)
712 /* JYG: We used to just return value_zero of the symbol type
713 if we're asked to avoid side effects. Otherwise we return
714 value_of_variable (...). However I'm not sure if
715 value_of_variable () has any side effect.
716 We need a full value object returned here for whatis_exp ()
717 to call evaluate_type () and then pass the full value to
718 value_rtti_target_type () if we are dealing with a pointer
719 or reference to a base class and print object is on. */
722 volatile struct gdb_exception except;
723 struct value *ret = NULL;
725 TRY_CATCH (except, RETURN_MASK_ERROR)
727 ret = value_of_variable (exp->elts[pc + 2].symbol,
728 exp->elts[pc + 1].block);
731 if (except.reason < 0)
733 if (noside == EVAL_AVOID_SIDE_EFFECTS)
734 ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol), not_lval);
736 throw_exception (except);
745 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
749 const char *name = &exp->elts[pc + 2].string;
753 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
754 regno = user_reg_map_name_to_regnum (exp->gdbarch,
755 name, strlen (name));
757 error (_("Register $%s not available."), name);
759 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
760 a value with the appropriate register type. Unfortunately,
761 we don't have easy access to the type of user registers.
762 So for these registers, we fetch the register value regardless
763 of the evaluation mode. */
764 if (noside == EVAL_AVOID_SIDE_EFFECTS
765 && regno < gdbarch_num_regs (exp->gdbarch)
766 + gdbarch_num_pseudo_regs (exp->gdbarch))
767 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
769 val = value_of_register (regno, get_selected_frame (NULL));
771 error (_("Value of register %s not available."), name);
777 type = language_bool_type (exp->language_defn, exp->gdbarch);
778 return value_from_longest (type, exp->elts[pc + 1].longconst);
782 return value_of_internalvar (exp->gdbarch,
783 exp->elts[pc + 1].internalvar);
786 tem = longest_to_int (exp->elts[pc + 1].longconst);
787 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
788 if (noside == EVAL_SKIP)
790 type = language_string_char_type (exp->language_defn, exp->gdbarch);
791 return value_string (&exp->elts[pc + 2].string, tem, type);
793 case OP_OBJC_NSSTRING: /* Objective C Foundation Class NSString constant. */
794 tem = longest_to_int (exp->elts[pc + 1].longconst);
795 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
796 if (noside == EVAL_SKIP)
800 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
803 tem = longest_to_int (exp->elts[pc + 1].longconst);
805 += 3 + BYTES_TO_EXP_ELEM ((tem + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
806 if (noside == EVAL_SKIP)
808 return value_bitstring (&exp->elts[pc + 2].string, tem,
809 builtin_type (exp->gdbarch)->builtin_int);
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 (exp->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,
1014 lookup_child_selector (exp->gdbarch, sel));
1017 case OP_OBJC_MSGCALL:
1018 { /* Objective C message (method) call. */
1020 CORE_ADDR responds_selector = 0;
1021 CORE_ADDR method_selector = 0;
1023 CORE_ADDR selector = 0;
1025 int struct_return = 0;
1026 int sub_no_side = 0;
1028 struct value *msg_send = NULL;
1029 struct value *msg_send_stret = NULL;
1030 int gnu_runtime = 0;
1032 struct value *target = NULL;
1033 struct value *method = NULL;
1034 struct value *called_method = NULL;
1036 struct type *selector_type = NULL;
1037 struct type *long_type;
1039 struct value *ret = NULL;
1042 selector = exp->elts[pc + 1].longconst;
1043 nargs = exp->elts[pc + 2].longconst;
1044 argvec = (struct value **) alloca (sizeof (struct value *)
1049 long_type = builtin_type (exp->gdbarch)->builtin_long;
1050 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1052 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1053 sub_no_side = EVAL_NORMAL;
1055 sub_no_side = noside;
1057 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1059 if (value_as_long (target) == 0)
1060 return value_from_longest (long_type, 0);
1062 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1065 /* Find the method dispatch (Apple runtime) or method lookup
1066 (GNU runtime) function for Objective-C. These will be used
1067 to lookup the symbol information for the method. If we
1068 can't find any symbol information, then we'll use these to
1069 call the method, otherwise we can call the method
1070 directly. The msg_send_stret function is used in the special
1071 case of a method that returns a structure (Apple runtime
1075 struct type *type = selector_type;
1076 type = lookup_function_type (type);
1077 type = lookup_pointer_type (type);
1078 type = lookup_function_type (type);
1079 type = lookup_pointer_type (type);
1081 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1083 = find_function_in_inferior ("objc_msg_lookup", NULL);
1085 msg_send = value_from_pointer (type, value_as_address (msg_send));
1086 msg_send_stret = value_from_pointer (type,
1087 value_as_address (msg_send_stret));
1091 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1092 /* Special dispatcher for methods returning structs */
1094 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1097 /* Verify the target object responds to this method. The
1098 standard top-level 'Object' class uses a different name for
1099 the verification method than the non-standard, but more
1100 often used, 'NSObject' class. Make sure we check for both. */
1103 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1104 if (responds_selector == 0)
1106 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1108 if (responds_selector == 0)
1109 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1112 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1113 if (method_selector == 0)
1115 = lookup_child_selector (exp->gdbarch, "methodFor:");
1117 if (method_selector == 0)
1118 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1120 /* Call the verification method, to make sure that the target
1121 class implements the desired method. */
1123 argvec[0] = msg_send;
1125 argvec[2] = value_from_longest (long_type, responds_selector);
1126 argvec[3] = value_from_longest (long_type, selector);
1129 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1132 /* Function objc_msg_lookup returns a pointer. */
1134 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1136 if (value_as_long (ret) == 0)
1137 error (_("Target does not respond to this message selector."));
1139 /* Call "methodForSelector:" method, to get the address of a
1140 function method that implements this selector for this
1141 class. If we can find a symbol at that address, then we
1142 know the return type, parameter types etc. (that's a good
1145 argvec[0] = msg_send;
1147 argvec[2] = value_from_longest (long_type, method_selector);
1148 argvec[3] = value_from_longest (long_type, selector);
1151 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1155 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1158 /* ret should now be the selector. */
1160 addr = value_as_long (ret);
1163 struct symbol *sym = NULL;
1164 /* Is it a high_level symbol? */
1166 sym = find_pc_function (addr);
1168 method = value_of_variable (sym, 0);
1171 /* If we found a method with symbol information, check to see
1172 if it returns a struct. Otherwise assume it doesn't. */
1178 struct type *val_type;
1180 funaddr = find_function_addr (method, &val_type);
1182 b = block_for_pc (funaddr);
1184 CHECK_TYPEDEF (val_type);
1186 if ((val_type == NULL)
1187 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1189 if (expect_type != NULL)
1190 val_type = expect_type;
1193 struct_return = using_struct_return (exp->gdbarch,
1194 value_type (method), val_type);
1196 else if (expect_type != NULL)
1198 struct_return = using_struct_return (exp->gdbarch, NULL,
1199 check_typedef (expect_type));
1202 /* Found a function symbol. Now we will substitute its
1203 value in place of the message dispatcher (obj_msgSend),
1204 so that we call the method directly instead of thru
1205 the dispatcher. The main reason for doing this is that
1206 we can now evaluate the return value and parameter values
1207 according to their known data types, in case we need to
1208 do things like promotion, dereferencing, special handling
1209 of structs and doubles, etc.
1211 We want to use the type signature of 'method', but still
1212 jump to objc_msgSend() or objc_msgSend_stret() to better
1213 mimic the behavior of the runtime. */
1217 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1218 error (_("method address has symbol information with non-function type; skipping"));
1220 set_value_address (method, value_as_address (msg_send_stret));
1222 set_value_address (method, value_as_address (msg_send));
1223 called_method = method;
1228 called_method = msg_send_stret;
1230 called_method = msg_send;
1233 if (noside == EVAL_SKIP)
1236 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1238 /* If the return type doesn't look like a function type,
1239 call an error. This can happen if somebody tries to
1240 turn a variable into a function call. This is here
1241 because people often want to call, eg, strcmp, which
1242 gdb doesn't know is a function. If gdb isn't asked for
1243 it's opinion (ie. through "whatis"), it won't offer
1246 struct type *type = value_type (called_method);
1247 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1248 type = TYPE_TARGET_TYPE (type);
1249 type = TYPE_TARGET_TYPE (type);
1253 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1254 return allocate_value (expect_type);
1256 return allocate_value (type);
1259 error (_("Expression of type other than \"method returning ...\" used as a method"));
1262 /* Now depending on whether we found a symbol for the method,
1263 we will either call the runtime dispatcher or the method
1266 argvec[0] = called_method;
1268 argvec[2] = value_from_longest (long_type, selector);
1269 /* User-supplied arguments. */
1270 for (tem = 0; tem < nargs; tem++)
1271 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1272 argvec[tem + 3] = 0;
1274 if (gnu_runtime && (method != NULL))
1276 /* Function objc_msg_lookup returns a pointer. */
1277 deprecated_set_value_type (argvec[0],
1278 lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
1279 argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1282 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1289 op = exp->elts[*pos].opcode;
1290 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1291 /* Allocate arg vector, including space for the function to be
1292 called in argvec[0] and a terminating NULL */
1293 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
1294 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1297 /* First, evaluate the structure into arg2 */
1300 if (noside == EVAL_SKIP)
1303 if (op == STRUCTOP_MEMBER)
1305 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1309 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1312 /* If the function is a virtual function, then the
1313 aggregate value (providing the structure) plays
1314 its part by providing the vtable. Otherwise,
1315 it is just along for the ride: call the function
1318 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1320 if (TYPE_CODE (check_typedef (value_type (arg1)))
1321 != TYPE_CODE_METHODPTR)
1322 error (_("Non-pointer-to-member value used in pointer-to-member "
1325 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1327 struct type *method_type = check_typedef (value_type (arg1));
1328 arg1 = value_zero (method_type, not_lval);
1331 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1333 /* Now, say which argument to start evaluating from */
1336 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1338 /* Hair for method invocations */
1342 /* First, evaluate the structure into arg2 */
1344 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1345 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1346 if (noside == EVAL_SKIP)
1349 if (op == STRUCTOP_STRUCT)
1351 /* If v is a variable in a register, and the user types
1352 v.method (), this will produce an error, because v has
1355 A possible way around this would be to allocate a
1356 copy of the variable on the stack, copy in the
1357 contents, call the function, and copy out the
1358 contents. I.e. convert this from call by reference
1359 to call by copy-return (or whatever it's called).
1360 However, this does not work because it is not the
1361 same: the method being called could stash a copy of
1362 the address, and then future uses through that address
1363 (after the method returns) would be expected to
1364 use the variable itself, not some copy of it. */
1365 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1369 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1371 /* Now, say which argument to start evaluating from */
1376 /* Non-method function call */
1378 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1380 type = value_type (argvec[0]);
1381 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1382 type = TYPE_TARGET_TYPE (type);
1383 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1385 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1387 /* pai: FIXME This seems to be coercing arguments before
1388 * overload resolution has been done! */
1389 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
1395 /* Evaluate arguments */
1396 for (; tem <= nargs; tem++)
1398 /* Ensure that array expressions are coerced into pointer objects. */
1399 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1402 /* signal end of arglist */
1405 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1407 int static_memfuncp;
1410 /* Method invocation : stuff "this" as first parameter */
1412 /* Name of method from expression */
1413 strcpy (tstr, &exp->elts[pc2 + 2].string);
1415 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1417 /* Language is C++, do some overload resolution before evaluation */
1418 struct value *valp = NULL;
1420 /* Prepare list of argument types for overload resolution */
1421 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1422 for (ix = 1; ix <= nargs; ix++)
1423 arg_types[ix - 1] = value_type (argvec[ix]);
1425 (void) find_overload_match (arg_types, nargs, tstr,
1426 1 /* method */ , 0 /* strict match */ ,
1427 &arg2 /* the object */ , NULL,
1428 &valp, NULL, &static_memfuncp);
1431 argvec[1] = arg2; /* the ``this'' pointer */
1432 argvec[0] = valp; /* use the method found after overload resolution */
1435 /* Non-C++ case -- or no overload resolution */
1437 struct value *temp = arg2;
1438 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1440 op == STRUCTOP_STRUCT
1441 ? "structure" : "structure pointer");
1442 /* value_struct_elt updates temp with the correct value
1443 of the ``this'' pointer if necessary, so modify argvec[1] to
1444 reflect any ``this'' changes. */
1445 arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
1446 value_address (temp)
1447 + value_embedded_offset (temp));
1448 argvec[1] = arg2; /* the ``this'' pointer */
1451 if (static_memfuncp)
1453 argvec[1] = argvec[0];
1458 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1463 else if (op == OP_VAR_VALUE)
1465 /* Non-member function being called */
1466 /* fn: This can only be done for C++ functions. A C-style function
1467 in a C++ program, for instance, does not have the fields that
1468 are expected here */
1470 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1472 /* Language is C++, do some overload resolution before evaluation */
1473 struct symbol *symp;
1475 /* Prepare list of argument types for overload resolution */
1476 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1477 for (ix = 1; ix <= nargs; ix++)
1478 arg_types[ix - 1] = value_type (argvec[ix]);
1480 (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
1481 0 /* not method */ , 0 /* strict match */ ,
1482 NULL, exp->elts[save_pos1+2].symbol /* the function */ ,
1485 /* Now fix the expression being evaluated */
1486 exp->elts[save_pos1+2].symbol = symp;
1487 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1491 /* Not C++, or no overload resolution allowed */
1492 /* nothing to be done; argvec already correctly set up */
1497 /* It is probably a C-style function */
1498 /* nothing to be done; argvec already correctly set up */
1503 if (noside == EVAL_SKIP)
1505 if (argvec[0] == NULL)
1506 error (_("Cannot evaluate function -- may be inlined"));
1507 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1509 /* If the return type doesn't look like a function type, call an
1510 error. This can happen if somebody tries to turn a variable into
1511 a function call. This is here because people often want to
1512 call, eg, strcmp, which gdb doesn't know is a function. If
1513 gdb isn't asked for it's opinion (ie. through "whatis"),
1514 it won't offer it. */
1516 struct type *ftype =
1517 TYPE_TARGET_TYPE (value_type (argvec[0]));
1520 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
1522 error (_("Expression of type other than \"Function returning ...\" used as function"));
1524 if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_INTERNAL_FUNCTION)
1525 return call_internal_function (exp->gdbarch, exp->language_defn,
1526 argvec[0], nargs, argvec + 1);
1528 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1529 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1531 case OP_F77_UNDETERMINED_ARGLIST:
1533 /* Remember that in F77, functions, substring ops and
1534 array subscript operations cannot be disambiguated
1535 at parse time. We have made all array subscript operations,
1536 substring operations as well as function calls come here
1537 and we now have to discover what the heck this thing actually was.
1538 If it is a function, we process just as if we got an OP_FUNCALL. */
1540 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1543 /* First determine the type code we are dealing with. */
1544 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1545 type = check_typedef (value_type (arg1));
1546 code = TYPE_CODE (type);
1548 if (code == TYPE_CODE_PTR)
1550 /* Fortran always passes variable to subroutines as pointer.
1551 So we need to look into its target type to see if it is
1552 array, string or function. If it is, we need to switch
1553 to the target value the original one points to. */
1554 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1556 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1557 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1558 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1560 arg1 = value_ind (arg1);
1561 type = check_typedef (value_type (arg1));
1562 code = TYPE_CODE (type);
1568 case TYPE_CODE_ARRAY:
1569 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1570 return value_f90_subarray (arg1, exp, pos, noside);
1572 goto multi_f77_subscript;
1574 case TYPE_CODE_STRING:
1575 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1576 return value_f90_subarray (arg1, exp, pos, noside);
1579 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1580 return value_subscript (arg1, value_as_long (arg2));
1584 case TYPE_CODE_FUNC:
1585 /* It's a function call. */
1586 /* Allocate arg vector, including space for the function to be
1587 called in argvec[0] and a terminating NULL */
1588 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
1591 for (; tem <= nargs; tem++)
1592 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1593 argvec[tem] = 0; /* signal end of arglist */
1597 error (_("Cannot perform substring on this type"));
1601 /* We have a complex number, There should be 2 floating
1602 point numbers that compose it */
1604 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1605 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1607 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1609 case STRUCTOP_STRUCT:
1610 tem = longest_to_int (exp->elts[pc + 1].longconst);
1611 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1612 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1613 if (noside == EVAL_SKIP)
1615 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1616 return value_zero (lookup_struct_elt_type (value_type (arg1),
1617 &exp->elts[pc + 2].string,
1622 struct value *temp = arg1;
1623 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1628 tem = longest_to_int (exp->elts[pc + 1].longconst);
1629 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1630 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1631 if (noside == EVAL_SKIP)
1634 /* JYG: if print object is on we need to replace the base type
1635 with rtti type in order to continue on with successful
1636 lookup of member / method only available in the rtti type. */
1638 struct type *type = value_type (arg1);
1639 struct type *real_type;
1640 int full, top, using_enc;
1641 struct value_print_options opts;
1643 get_user_print_options (&opts);
1644 if (opts.objectprint && TYPE_TARGET_TYPE(type) &&
1645 (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1647 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1650 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1651 real_type = lookup_pointer_type (real_type);
1653 real_type = lookup_reference_type (real_type);
1655 arg1 = value_cast (real_type, arg1);
1660 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1661 return value_zero (lookup_struct_elt_type (value_type (arg1),
1662 &exp->elts[pc + 2].string,
1667 struct value *temp = arg1;
1668 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1669 NULL, "structure pointer");
1672 case STRUCTOP_MEMBER:
1674 if (op == STRUCTOP_MEMBER)
1675 arg1 = evaluate_subexp_for_address (exp, pos, noside);
1677 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1679 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1681 if (noside == EVAL_SKIP)
1684 type = check_typedef (value_type (arg2));
1685 switch (TYPE_CODE (type))
1687 case TYPE_CODE_METHODPTR:
1688 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1689 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
1692 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
1693 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
1694 return value_ind (arg2);
1697 case TYPE_CODE_MEMBERPTR:
1698 /* Now, convert these values to an address. */
1699 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
1702 mem_offset = value_as_long (arg2);
1704 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
1705 value_as_long (arg1) + mem_offset);
1706 return value_ind (arg3);
1709 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1713 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1714 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1715 if (noside == EVAL_SKIP)
1717 if (binop_user_defined_p (op, arg1, arg2))
1718 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1720 return value_concat (arg1, arg2);
1723 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1724 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1726 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1728 if (binop_user_defined_p (op, arg1, arg2))
1729 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1731 return value_assign (arg1, arg2);
1733 case BINOP_ASSIGN_MODIFY:
1735 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1736 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1737 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1739 op = exp->elts[pc + 1].opcode;
1740 if (binop_user_defined_p (op, arg1, arg2))
1741 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
1742 else if (op == BINOP_ADD && ptrmath_type_p (value_type (arg1))
1743 && is_integral_type (value_type (arg2)))
1744 arg2 = value_ptradd (arg1, value_as_long (arg2));
1745 else if (op == BINOP_SUB && ptrmath_type_p (value_type (arg1))
1746 && is_integral_type (value_type (arg2)))
1747 arg2 = value_ptradd (arg1, - value_as_long (arg2));
1750 struct value *tmp = arg1;
1752 /* For shift and integer exponentiation operations,
1753 only promote the first argument. */
1754 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1755 && is_integral_type (value_type (arg2)))
1756 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
1758 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
1760 arg2 = value_binop (tmp, arg2, op);
1762 return value_assign (arg1, arg2);
1765 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1766 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1767 if (noside == EVAL_SKIP)
1769 if (binop_user_defined_p (op, arg1, arg2))
1770 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1771 else if (ptrmath_type_p (value_type (arg1))
1772 && is_integral_type (value_type (arg2)))
1773 return value_ptradd (arg1, value_as_long (arg2));
1774 else if (ptrmath_type_p (value_type (arg2))
1775 && is_integral_type (value_type (arg1)))
1776 return value_ptradd (arg2, value_as_long (arg1));
1779 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1780 return value_binop (arg1, arg2, BINOP_ADD);
1784 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1785 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1786 if (noside == EVAL_SKIP)
1788 if (binop_user_defined_p (op, arg1, arg2))
1789 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1790 else if (ptrmath_type_p (value_type (arg1))
1791 && ptrmath_type_p (value_type (arg2)))
1793 /* FIXME -- should be ptrdiff_t */
1794 type = builtin_type (exp->gdbarch)->builtin_long;
1795 return value_from_longest (type, value_ptrdiff (arg1, arg2));
1797 else if (ptrmath_type_p (value_type (arg1))
1798 && is_integral_type (value_type (arg2)))
1799 return value_ptradd (arg1, - value_as_long (arg2));
1802 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1803 return value_binop (arg1, arg2, BINOP_SUB);
1814 case BINOP_BITWISE_AND:
1815 case BINOP_BITWISE_IOR:
1816 case BINOP_BITWISE_XOR:
1817 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1818 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1819 if (noside == EVAL_SKIP)
1821 if (binop_user_defined_p (op, arg1, arg2))
1822 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1825 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1826 fudge arg2 to avoid division-by-zero, the caller is
1827 (theoretically) only looking for the type of the result. */
1828 if (noside == EVAL_AVOID_SIDE_EFFECTS
1829 /* ??? Do we really want to test for BINOP_MOD here?
1830 The implementation of value_binop gives it a well-defined
1833 || op == BINOP_INTDIV
1836 && value_logical_not (arg2))
1838 struct value *v_one, *retval;
1840 v_one = value_one (value_type (arg2), not_lval);
1841 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
1842 retval = value_binop (arg1, v_one, op);
1847 /* For shift and integer exponentiation operations,
1848 only promote the first argument. */
1849 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
1850 && is_integral_type (value_type (arg2)))
1851 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
1853 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
1855 return value_binop (arg1, arg2, op);
1860 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1861 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1862 if (noside == EVAL_SKIP)
1864 error (_("':' operator used in invalid context"));
1866 case BINOP_SUBSCRIPT:
1867 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1868 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1869 if (noside == EVAL_SKIP)
1871 if (binop_user_defined_p (op, arg1, arg2))
1872 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1875 /* If the user attempts to subscript something that is not an
1876 array or pointer type (like a plain int variable for example),
1877 then report this as an error. */
1879 arg1 = coerce_ref (arg1);
1880 type = check_typedef (value_type (arg1));
1881 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
1882 && TYPE_CODE (type) != TYPE_CODE_PTR)
1884 if (TYPE_NAME (type))
1885 error (_("cannot subscript something of type `%s'"),
1888 error (_("cannot subscript requested type"));
1891 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1892 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
1894 return value_subscript (arg1, value_as_long (arg2));
1898 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1899 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1900 if (noside == EVAL_SKIP)
1902 type = language_bool_type (exp->language_defn, exp->gdbarch);
1903 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
1905 case MULTI_SUBSCRIPT:
1907 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1908 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1911 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1912 /* FIXME: EVAL_SKIP handling may not be correct. */
1913 if (noside == EVAL_SKIP)
1924 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1925 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1927 /* If the user attempts to subscript something that has no target
1928 type (like a plain int variable for example), then report this
1931 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
1934 arg1 = value_zero (type, VALUE_LVAL (arg1));
1940 error (_("cannot subscript something of type `%s'"),
1941 TYPE_NAME (value_type (arg1)));
1945 if (binop_user_defined_p (op, arg1, arg2))
1947 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
1951 arg1 = coerce_ref (arg1);
1952 type = check_typedef (value_type (arg1));
1954 switch (TYPE_CODE (type))
1957 case TYPE_CODE_ARRAY:
1958 case TYPE_CODE_STRING:
1959 arg1 = value_subscript (arg1, value_as_long (arg2));
1962 case TYPE_CODE_BITSTRING:
1963 type = language_bool_type (exp->language_defn, exp->gdbarch);
1964 arg1 = value_bitstring_subscript (type, arg1,
1965 value_as_long (arg2));
1969 if (TYPE_NAME (type))
1970 error (_("cannot subscript something of type `%s'"),
1973 error (_("cannot subscript requested type"));
1979 multi_f77_subscript:
1981 int subscript_array[MAX_FORTRAN_DIMS];
1982 int array_size_array[MAX_FORTRAN_DIMS];
1983 int ndimensions = 1, i;
1984 struct type *tmp_type;
1985 int offset_item; /* The array offset where the item lives */
1987 if (nargs > MAX_FORTRAN_DIMS)
1988 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
1990 tmp_type = check_typedef (value_type (arg1));
1991 ndimensions = calc_f77_array_dims (type);
1993 if (nargs != ndimensions)
1994 error (_("Wrong number of subscripts"));
1996 gdb_assert (nargs > 0);
1998 /* Now that we know we have a legal array subscript expression
1999 let us actually find out where this element exists in the array. */
2002 /* Take array indices left to right */
2003 for (i = 0; i < nargs; i++)
2005 /* Evaluate each subscript, It must be a legal integer in F77 */
2006 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2008 /* Fill in the subscript and array size arrays */
2010 subscript_array[i] = value_as_long (arg2);
2013 /* Internal type of array is arranged right to left */
2014 for (i = 0; i < nargs; i++)
2016 upper = f77_get_upperbound (tmp_type);
2017 lower = f77_get_lowerbound (tmp_type);
2019 array_size_array[nargs - i - 1] = upper - lower + 1;
2021 /* Zero-normalize subscripts so that offsetting will work. */
2023 subscript_array[nargs - i - 1] -= lower;
2025 /* If we are at the bottom of a multidimensional
2026 array type then keep a ptr to the last ARRAY
2027 type around for use when calling value_subscript()
2028 below. This is done because we pretend to value_subscript
2029 that we actually have a one-dimensional array
2030 of base element type that we apply a simple
2034 tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
2037 /* Now let us calculate the offset for this item */
2039 offset_item = subscript_array[ndimensions - 1];
2041 for (i = ndimensions - 1; i > 0; --i)
2043 array_size_array[i - 1] * offset_item + subscript_array[i - 1];
2045 /* Let us now play a dirty trick: we will take arg1
2046 which is a value node pointing to the topmost level
2047 of the multidimensional array-set and pretend
2048 that it is actually a array of the final element
2049 type, this will ensure that value_subscript()
2050 returns the correct type value */
2052 deprecated_set_value_type (arg1, tmp_type);
2053 return value_subscripted_rvalue (arg1, offset_item, 0);
2056 case BINOP_LOGICAL_AND:
2057 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2058 if (noside == EVAL_SKIP)
2060 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2065 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2068 if (binop_user_defined_p (op, arg1, arg2))
2070 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2071 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2075 tem = value_logical_not (arg1);
2076 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2077 (tem ? EVAL_SKIP : noside));
2078 type = language_bool_type (exp->language_defn, exp->gdbarch);
2079 return value_from_longest (type,
2080 (LONGEST) (!tem && !value_logical_not (arg2)));
2083 case BINOP_LOGICAL_OR:
2084 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2085 if (noside == EVAL_SKIP)
2087 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2092 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2095 if (binop_user_defined_p (op, arg1, arg2))
2097 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2098 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2102 tem = value_logical_not (arg1);
2103 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2104 (!tem ? EVAL_SKIP : noside));
2105 type = language_bool_type (exp->language_defn, exp->gdbarch);
2106 return value_from_longest (type,
2107 (LONGEST) (!tem || !value_logical_not (arg2)));
2111 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2112 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2113 if (noside == EVAL_SKIP)
2115 if (binop_user_defined_p (op, arg1, arg2))
2117 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2121 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2122 tem = value_equal (arg1, arg2);
2123 type = language_bool_type (exp->language_defn, exp->gdbarch);
2124 return value_from_longest (type, (LONGEST) tem);
2127 case BINOP_NOTEQUAL:
2128 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2129 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2130 if (noside == EVAL_SKIP)
2132 if (binop_user_defined_p (op, arg1, arg2))
2134 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2138 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2139 tem = value_equal (arg1, arg2);
2140 type = language_bool_type (exp->language_defn, exp->gdbarch);
2141 return value_from_longest (type, (LONGEST) ! tem);
2145 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2146 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2147 if (noside == EVAL_SKIP)
2149 if (binop_user_defined_p (op, arg1, arg2))
2151 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2155 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2156 tem = value_less (arg1, arg2);
2157 type = language_bool_type (exp->language_defn, exp->gdbarch);
2158 return value_from_longest (type, (LONGEST) tem);
2162 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2163 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2164 if (noside == EVAL_SKIP)
2166 if (binop_user_defined_p (op, arg1, arg2))
2168 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2172 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2173 tem = value_less (arg2, arg1);
2174 type = language_bool_type (exp->language_defn, exp->gdbarch);
2175 return value_from_longest (type, (LONGEST) tem);
2179 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2180 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2181 if (noside == EVAL_SKIP)
2183 if (binop_user_defined_p (op, arg1, arg2))
2185 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2189 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2190 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2191 type = language_bool_type (exp->language_defn, exp->gdbarch);
2192 return value_from_longest (type, (LONGEST) tem);
2196 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2197 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2198 if (noside == EVAL_SKIP)
2200 if (binop_user_defined_p (op, arg1, arg2))
2202 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2206 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2207 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2208 type = language_bool_type (exp->language_defn, exp->gdbarch);
2209 return value_from_longest (type, (LONGEST) tem);
2213 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2214 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2215 if (noside == EVAL_SKIP)
2217 type = check_typedef (value_type (arg2));
2218 if (TYPE_CODE (type) != TYPE_CODE_INT)
2219 error (_("Non-integral right operand for \"@\" operator."));
2220 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2222 return allocate_repeat_value (value_type (arg1),
2223 longest_to_int (value_as_long (arg2)));
2226 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2229 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2230 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2233 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2234 if (noside == EVAL_SKIP)
2236 if (unop_user_defined_p (op, arg1))
2237 return value_x_unop (arg1, op, noside);
2240 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2241 return value_pos (arg1);
2245 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2246 if (noside == EVAL_SKIP)
2248 if (unop_user_defined_p (op, arg1))
2249 return value_x_unop (arg1, op, noside);
2252 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2253 return value_neg (arg1);
2256 case UNOP_COMPLEMENT:
2257 /* C++: check for and handle destructor names. */
2258 op = exp->elts[*pos].opcode;
2260 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2261 if (noside == EVAL_SKIP)
2263 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2264 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2267 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2268 return value_complement (arg1);
2271 case UNOP_LOGICAL_NOT:
2272 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2273 if (noside == EVAL_SKIP)
2275 if (unop_user_defined_p (op, arg1))
2276 return value_x_unop (arg1, op, noside);
2279 type = language_bool_type (exp->language_defn, exp->gdbarch);
2280 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2284 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2285 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2286 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2287 type = check_typedef (value_type (arg1));
2288 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2289 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2290 error (_("Attempt to dereference pointer to member without an object"));
2291 if (noside == EVAL_SKIP)
2293 if (unop_user_defined_p (op, arg1))
2294 return value_x_unop (arg1, op, noside);
2295 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2297 type = check_typedef (value_type (arg1));
2298 if (TYPE_CODE (type) == TYPE_CODE_PTR
2299 || TYPE_CODE (type) == TYPE_CODE_REF
2300 /* In C you can dereference an array to get the 1st elt. */
2301 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2303 return value_zero (TYPE_TARGET_TYPE (type),
2305 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2306 /* GDB allows dereferencing an int. */
2307 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2310 error (_("Attempt to take contents of a non-pointer value."));
2313 /* Allow * on an integer so we can cast it to whatever we want.
2314 This returns an int, which seems like the most C-like thing to
2315 do. "long long" variables are rare enough that
2316 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2317 if (TYPE_CODE (type) == TYPE_CODE_INT)
2318 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2319 (CORE_ADDR) value_as_address (arg1));
2320 return value_ind (arg1);
2323 /* C++: check for and handle pointer to members. */
2325 op = exp->elts[*pos].opcode;
2327 if (noside == EVAL_SKIP)
2329 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2334 struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
2339 if (noside == EVAL_SKIP)
2341 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2344 return evaluate_subexp_for_sizeof (exp, pos);
2348 type = exp->elts[pc + 1].type;
2349 arg1 = evaluate_subexp (type, exp, pos, noside);
2350 if (noside == EVAL_SKIP)
2352 if (type != value_type (arg1))
2353 arg1 = value_cast (type, arg1);
2358 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2359 if (noside == EVAL_SKIP)
2361 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2362 return value_zero (exp->elts[pc + 1].type, lval_memory);
2364 return value_at_lazy (exp->elts[pc + 1].type,
2365 value_as_address (arg1));
2367 case UNOP_MEMVAL_TLS:
2369 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2370 if (noside == EVAL_SKIP)
2372 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2373 return value_zero (exp->elts[pc + 2].type, lval_memory);
2377 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2378 value_as_address (arg1));
2379 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2382 case UNOP_PREINCREMENT:
2383 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2384 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2386 else if (unop_user_defined_p (op, arg1))
2388 return value_x_unop (arg1, op, noside);
2392 if (ptrmath_type_p (value_type (arg1)))
2393 arg2 = value_ptradd (arg1, 1);
2396 struct value *tmp = arg1;
2397 arg2 = value_one (value_type (arg1), not_lval);
2398 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2399 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2402 return value_assign (arg1, arg2);
2405 case UNOP_PREDECREMENT:
2406 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2407 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2409 else if (unop_user_defined_p (op, arg1))
2411 return value_x_unop (arg1, op, noside);
2415 if (ptrmath_type_p (value_type (arg1)))
2416 arg2 = value_ptradd (arg1, -1);
2419 struct value *tmp = arg1;
2420 arg2 = value_one (value_type (arg1), not_lval);
2421 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2422 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2425 return value_assign (arg1, arg2);
2428 case UNOP_POSTINCREMENT:
2429 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2430 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2432 else if (unop_user_defined_p (op, arg1))
2434 return value_x_unop (arg1, op, noside);
2438 if (ptrmath_type_p (value_type (arg1)))
2439 arg2 = value_ptradd (arg1, 1);
2442 struct value *tmp = arg1;
2443 arg2 = value_one (value_type (arg1), not_lval);
2444 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2445 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2448 value_assign (arg1, arg2);
2452 case UNOP_POSTDECREMENT:
2453 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2454 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2456 else if (unop_user_defined_p (op, arg1))
2458 return value_x_unop (arg1, op, noside);
2462 if (ptrmath_type_p (value_type (arg1)))
2463 arg2 = value_ptradd (arg1, -1);
2466 struct value *tmp = arg1;
2467 arg2 = value_one (value_type (arg1), not_lval);
2468 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2469 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2472 value_assign (arg1, arg2);
2478 return value_of_this (1);
2482 return value_of_local ("self", 1);
2485 /* The value is not supposed to be used. This is here to make it
2486 easier to accommodate expressions that contain types. */
2488 if (noside == EVAL_SKIP)
2490 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2492 struct type *type = exp->elts[pc + 1].type;
2493 /* If this is a typedef, then find its immediate target. We
2494 use check_typedef to resolve stubs, but we ignore its
2495 result because we do not want to dig past all
2497 check_typedef (type);
2498 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2499 type = TYPE_TARGET_TYPE (type);
2500 return allocate_value (type);
2503 error (_("Attempt to use a type name as an expression"));
2506 /* Removing this case and compiling with gcc -Wall reveals that
2507 a lot of cases are hitting this case. Some of these should
2508 probably be removed from expression.h; others are legitimate
2509 expressions which are (apparently) not fully implemented.
2511 If there are any cases landing here which mean a user error,
2512 then they should be separate cases, with more descriptive
2516 GDB does not (yet) know how to evaluate that kind of expression"));
2520 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
2523 /* Evaluate a subexpression of EXP, at index *POS,
2524 and return the address of that subexpression.
2525 Advance *POS over the subexpression.
2526 If the subexpression isn't an lvalue, get an error.
2527 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2528 then only the type of the result need be correct. */
2530 static struct value *
2531 evaluate_subexp_for_address (struct expression *exp, int *pos,
2541 op = exp->elts[pc].opcode;
2547 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2549 /* We can't optimize out "&*" if there's a user-defined operator*. */
2550 if (unop_user_defined_p (op, x))
2552 x = value_x_unop (x, op, noside);
2553 goto default_case_after_eval;
2560 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2561 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2564 var = exp->elts[pc + 2].symbol;
2566 /* C++: The "address" of a reference should yield the address
2567 * of the object pointed to. Let value_addr() deal with it. */
2568 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2572 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2575 lookup_pointer_type (SYMBOL_TYPE (var));
2576 enum address_class sym_class = SYMBOL_CLASS (var);
2578 if (sym_class == LOC_CONST
2579 || sym_class == LOC_CONST_BYTES
2580 || sym_class == LOC_REGISTER)
2581 error (_("Attempt to take address of register or constant."));
2584 value_zero (type, not_lval);
2587 return address_of_variable (var, exp->elts[pc + 1].block);
2590 tem = longest_to_int (exp->elts[pc + 2].longconst);
2591 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2592 x = value_aggregate_elt (exp->elts[pc + 1].type,
2593 &exp->elts[pc + 3].string,
2596 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2601 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2602 default_case_after_eval:
2603 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2605 struct type *type = check_typedef (value_type (x));
2607 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2608 return value_zero (lookup_pointer_type (value_type (x)),
2610 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2611 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2614 error (_("Attempt to take address of value not located in memory."));
2616 return value_addr (x);
2620 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2621 When used in contexts where arrays will be coerced anyway, this is
2622 equivalent to `evaluate_subexp' but much faster because it avoids
2623 actually fetching array contents (perhaps obsolete now that we have
2626 Note that we currently only do the coercion for C expressions, where
2627 arrays are zero based and the coercion is correct. For other languages,
2628 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2629 to decide if coercion is appropriate.
2634 evaluate_subexp_with_coercion (struct expression *exp,
2635 int *pos, enum noside noside)
2644 op = exp->elts[pc].opcode;
2649 var = exp->elts[pc + 2].symbol;
2650 type = check_typedef (SYMBOL_TYPE (var));
2651 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
2652 && CAST_IS_CONVERSION)
2655 val = address_of_variable (var, exp->elts[pc + 1].block);
2656 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2662 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2666 /* Evaluate a subexpression of EXP, at index *POS,
2667 and return a value for the size of that subexpression.
2668 Advance *POS over the subexpression. */
2670 static struct value *
2671 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
2673 /* FIXME: This should be size_t. */
2674 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2681 op = exp->elts[pc].opcode;
2685 /* This case is handled specially
2686 so that we avoid creating a value for the result type.
2687 If the result type is very big, it's desirable not to
2688 create a value unnecessarily. */
2691 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2692 type = check_typedef (value_type (val));
2693 if (TYPE_CODE (type) != TYPE_CODE_PTR
2694 && TYPE_CODE (type) != TYPE_CODE_REF
2695 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
2696 error (_("Attempt to take contents of a non-pointer value."));
2697 type = check_typedef (TYPE_TARGET_TYPE (type));
2698 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2702 type = check_typedef (exp->elts[pc + 1].type);
2703 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2707 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
2709 value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
2712 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2713 return value_from_longest (size_type,
2714 (LONGEST) TYPE_LENGTH (value_type (val)));
2718 /* Parse a type expression in the string [P..P+LENGTH). */
2721 parse_and_eval_type (char *p, int length)
2723 char *tmp = (char *) alloca (length + 4);
2724 struct expression *expr;
2726 memcpy (tmp + 1, p, length);
2727 tmp[length + 1] = ')';
2728 tmp[length + 2] = '0';
2729 tmp[length + 3] = '\0';
2730 expr = parse_expression (tmp);
2731 if (expr->elts[0].opcode != UNOP_CAST)
2732 error (_("Internal error in eval_type."));
2733 return expr->elts[1].type;
2737 calc_f77_array_dims (struct type *array_type)
2740 struct type *tmp_type;
2742 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
2743 error (_("Can't get dimensions for a non-array type"));
2745 tmp_type = array_type;
2747 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
2749 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)