1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
27 #include "gdbthread.h"
28 #include "language.h" /* For CAST_IS_CONVERSION. */
29 #include "f-lang.h" /* For array bound stuff. */
32 #include "objc-lang.h"
34 #include "parser-defs.h"
35 #include "cp-support.h"
38 #include "user-regs.h"
40 #include "gdb_obstack.h"
42 #include "typeprint.h"
45 /* This is defined in valops.c */
46 extern int overload_resolution;
48 /* Prototypes for local functions. */
50 static struct value *evaluate_subexp_for_sizeof (struct expression *, int *,
53 static struct value *evaluate_subexp_for_address (struct expression *,
56 static value *evaluate_subexp_for_cast (expression *exp, int *pos,
60 static struct value *evaluate_struct_tuple (struct value *,
61 struct expression *, int *,
64 static LONGEST init_array_element (struct value *, struct value *,
65 struct expression *, int *, enum noside,
69 evaluate_subexp (struct type *expect_type, struct expression *exp,
70 int *pos, enum noside noside)
72 struct cleanup *cleanups;
74 int cleanup_temps = 0;
76 if (*pos == 0 && target_has_execution
77 && exp->language_defn->la_language == language_cplus
78 && !thread_stack_temporaries_enabled_p (inferior_ptid))
80 cleanups = enable_thread_stack_temporaries (inferior_ptid);
84 retval = (*exp->language_defn->la_exp_desc->evaluate_exp)
85 (expect_type, exp, pos, noside);
89 if (value_in_thread_stack_temporaries (retval, inferior_ptid))
90 retval = value_non_lval (retval);
91 do_cleanups (cleanups);
97 /* Parse the string EXP as a C expression, evaluate it,
98 and return the result as a number. */
101 parse_and_eval_address (const char *exp)
103 expression_up expr = parse_expression (exp);
105 return value_as_address (evaluate_expression (expr.get ()));
108 /* Like parse_and_eval_address, but treats the value of the expression
109 as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
111 parse_and_eval_long (const char *exp)
113 expression_up expr = parse_expression (exp);
115 return value_as_long (evaluate_expression (expr.get ()));
119 parse_and_eval (const char *exp)
121 expression_up expr = parse_expression (exp);
123 return evaluate_expression (expr.get ());
126 /* Parse up to a comma (or to a closeparen)
127 in the string EXPP as an expression, evaluate it, and return the value.
128 EXPP is advanced to point to the comma. */
131 parse_to_comma_and_eval (const char **expp)
133 expression_up expr = parse_exp_1 (expp, 0, (struct block *) 0, 1);
135 return evaluate_expression (expr.get ());
138 /* Evaluate an expression in internal prefix form
139 such as is constructed by parse.y.
141 See expression.h for info on the format of an expression. */
144 evaluate_expression (struct expression *exp)
148 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
151 /* Evaluate an expression, avoiding all memory references
152 and getting a value whose type alone is correct. */
155 evaluate_type (struct expression *exp)
159 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
162 /* Evaluate a subexpression, avoiding all memory references and
163 getting a value whose type alone is correct. */
166 evaluate_subexpression_type (struct expression *exp, int subexp)
168 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
171 /* Find the current value of a watchpoint on EXP. Return the value in
172 *VALP and *RESULTP and the chain of intermediate and final values
173 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
176 If PRESERVE_ERRORS is true, then exceptions are passed through.
177 Otherwise, if PRESERVE_ERRORS is false, then if a memory error
178 occurs while evaluating the expression, *RESULTP will be set to
179 NULL. *RESULTP may be a lazy value, if the result could not be
180 read from memory. It is used to determine whether a value is
181 user-specified (we should watch the whole value) or intermediate
182 (we should watch only the bit used to locate the final value).
184 If the final value, or any intermediate value, could not be read
185 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
186 set to any referenced values. *VALP will never be a lazy value.
187 This is the value which we store in struct breakpoint.
189 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
190 value chain. The caller must free the values individually. If
191 VAL_CHAIN is NULL, all generated values will be left on the value
195 fetch_subexp_value (struct expression *exp, int *pc, struct value **valp,
196 struct value **resultp, struct value **val_chain,
199 struct value *mark, *new_mark, *result;
207 /* Evaluate the expression. */
208 mark = value_mark ();
213 result = evaluate_subexp (NULL_TYPE, exp, pc, EVAL_NORMAL);
215 CATCH (ex, RETURN_MASK_ALL)
217 /* Ignore memory errors if we want watchpoints pointing at
218 inaccessible memory to still be created; otherwise, throw the
219 error to some higher catcher. */
223 if (!preserve_errors)
226 throw_exception (ex);
232 new_mark = value_mark ();
233 if (mark == new_mark)
238 /* Make sure it's not lazy, so that after the target stops again we
239 have a non-lazy previous value to compare with. */
242 if (!value_lazy (result))
249 value_fetch_lazy (result);
252 CATCH (except, RETURN_MASK_ERROR)
261 /* Return the chain of intermediate values. We use this to
262 decide which addresses to watch. */
263 *val_chain = new_mark;
264 value_release_to_mark (mark);
268 /* Extract a field operation from an expression. If the subexpression
269 of EXP starting at *SUBEXP is not a structure dereference
270 operation, return NULL. Otherwise, return the name of the
271 dereferenced field, and advance *SUBEXP to point to the
272 subexpression of the left-hand-side of the dereference. This is
273 used when completing field names. */
276 extract_field_op (struct expression *exp, int *subexp)
281 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
282 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
284 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
285 result = &exp->elts[*subexp + 2].string;
286 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
290 /* This function evaluates brace-initializers (in C/C++) for
293 static struct value *
294 evaluate_struct_tuple (struct value *struct_val,
295 struct expression *exp,
296 int *pos, enum noside noside, int nargs)
298 struct type *struct_type = check_typedef (value_type (struct_val));
299 struct type *field_type;
304 struct value *val = NULL;
309 /* Skip static fields. */
310 while (fieldno < TYPE_NFIELDS (struct_type)
311 && field_is_static (&TYPE_FIELD (struct_type,
314 if (fieldno >= TYPE_NFIELDS (struct_type))
315 error (_("too many initializers"));
316 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
317 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
318 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
319 error (_("don't know which variant you want to set"));
321 /* Here, struct_type is the type of the inner struct,
322 while substruct_type is the type of the inner struct.
323 These are the same for normal structures, but a variant struct
324 contains anonymous union fields that contain substruct fields.
325 The value fieldno is the index of the top-level (normal or
326 anonymous union) field in struct_field, while the value
327 subfieldno is the index of the actual real (named inner) field
328 in substruct_type. */
330 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
332 val = evaluate_subexp (field_type, exp, pos, noside);
334 /* Now actually set the field in struct_val. */
336 /* Assign val to field fieldno. */
337 if (value_type (val) != field_type)
338 val = value_cast (field_type, val);
340 bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno);
341 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
342 addr = value_contents_writeable (struct_val) + bitpos / 8;
344 modify_field (struct_type, addr,
345 value_as_long (val), bitpos % 8, bitsize);
347 memcpy (addr, value_contents (val),
348 TYPE_LENGTH (value_type (val)));
354 /* Recursive helper function for setting elements of array tuples.
355 The target is ARRAY (which has bounds LOW_BOUND to HIGH_BOUND); the
356 element value is ELEMENT; EXP, POS and NOSIDE are as usual.
357 Evaluates index expresions and sets the specified element(s) of
358 ARRAY to ELEMENT. Returns last index value. */
361 init_array_element (struct value *array, struct value *element,
362 struct expression *exp, int *pos,
363 enum noside noside, LONGEST low_bound, LONGEST high_bound)
366 int element_size = TYPE_LENGTH (value_type (element));
368 if (exp->elts[*pos].opcode == BINOP_COMMA)
371 init_array_element (array, element, exp, pos, noside,
372 low_bound, high_bound);
373 return init_array_element (array, element,
374 exp, pos, noside, low_bound, high_bound);
378 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
379 if (index < low_bound || index > high_bound)
380 error (_("tuple index out of range"));
381 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
382 value_contents (element), element_size);
387 static struct value *
388 value_f90_subarray (struct value *array,
389 struct expression *exp, int *pos, enum noside noside)
392 LONGEST low_bound, high_bound;
393 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
394 enum range_type range_type
395 = (enum range_type) longest_to_int (exp->elts[pc].longconst);
399 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
400 low_bound = TYPE_LOW_BOUND (range);
402 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
404 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
405 high_bound = TYPE_HIGH_BOUND (range);
407 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
409 return value_slice (array, low_bound, high_bound - low_bound + 1);
413 /* Promote value ARG1 as appropriate before performing a unary operation
415 If the result is not appropriate for any particular language then it
416 needs to patch this function. */
419 unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
424 *arg1 = coerce_ref (*arg1);
425 type1 = check_typedef (value_type (*arg1));
427 if (is_integral_type (type1))
429 switch (language->la_language)
432 /* Perform integral promotion for ANSI C/C++.
433 If not appropropriate for any particular language
434 it needs to modify this function. */
436 struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
438 if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
439 *arg1 = value_cast (builtin_int, *arg1);
446 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
447 operation on those two operands.
448 If the result is not appropriate for any particular language then it
449 needs to patch this function. */
452 binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
453 struct value **arg1, struct value **arg2)
455 struct type *promoted_type = NULL;
459 *arg1 = coerce_ref (*arg1);
460 *arg2 = coerce_ref (*arg2);
462 type1 = check_typedef (value_type (*arg1));
463 type2 = check_typedef (value_type (*arg2));
465 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
466 && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
467 && !is_integral_type (type1))
468 || (TYPE_CODE (type2) != TYPE_CODE_FLT
469 && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
470 && !is_integral_type (type2)))
473 if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
474 || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
476 /* No promotion required. */
478 else if (TYPE_CODE (type1) == TYPE_CODE_FLT
479 || TYPE_CODE (type2) == TYPE_CODE_FLT)
481 switch (language->la_language)
487 case language_opencl:
488 /* No promotion required. */
492 /* For other languages the result type is unchanged from gdb
493 version 6.7 for backward compatibility.
494 If either arg was long double, make sure that value is also long
495 double. Otherwise use double. */
496 if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch)
497 || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
498 promoted_type = builtin_type (gdbarch)->builtin_long_double;
500 promoted_type = builtin_type (gdbarch)->builtin_double;
504 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
505 && TYPE_CODE (type2) == TYPE_CODE_BOOL)
507 /* No promotion required. */
510 /* Integral operations here. */
511 /* FIXME: Also mixed integral/booleans, with result an integer. */
513 const struct builtin_type *builtin = builtin_type (gdbarch);
514 unsigned int promoted_len1 = TYPE_LENGTH (type1);
515 unsigned int promoted_len2 = TYPE_LENGTH (type2);
516 int is_unsigned1 = TYPE_UNSIGNED (type1);
517 int is_unsigned2 = TYPE_UNSIGNED (type2);
518 unsigned int result_len;
519 int unsigned_operation;
521 /* Determine type length and signedness after promotion for
523 if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int))
526 promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
528 if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
531 promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
534 if (promoted_len1 > promoted_len2)
536 unsigned_operation = is_unsigned1;
537 result_len = promoted_len1;
539 else if (promoted_len2 > promoted_len1)
541 unsigned_operation = is_unsigned2;
542 result_len = promoted_len2;
546 unsigned_operation = is_unsigned1 || is_unsigned2;
547 result_len = promoted_len1;
550 switch (language->la_language)
556 if (result_len <= TYPE_LENGTH (builtin->builtin_int))
558 promoted_type = (unsigned_operation
559 ? builtin->builtin_unsigned_int
560 : builtin->builtin_int);
562 else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
564 promoted_type = (unsigned_operation
565 ? builtin->builtin_unsigned_long
566 : builtin->builtin_long);
570 promoted_type = (unsigned_operation
571 ? builtin->builtin_unsigned_long_long
572 : builtin->builtin_long_long);
575 case language_opencl:
576 if (result_len <= TYPE_LENGTH (lookup_signed_typename
577 (language, gdbarch, "int")))
581 ? lookup_unsigned_typename (language, gdbarch, "int")
582 : lookup_signed_typename (language, gdbarch, "int"));
584 else if (result_len <= TYPE_LENGTH (lookup_signed_typename
585 (language, gdbarch, "long")))
589 ? lookup_unsigned_typename (language, gdbarch, "long")
590 : lookup_signed_typename (language, gdbarch,"long"));
594 /* For other languages the result type is unchanged from gdb
595 version 6.7 for backward compatibility.
596 If either arg was long long, make sure that value is also long
597 long. Otherwise use long. */
598 if (unsigned_operation)
600 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
601 promoted_type = builtin->builtin_unsigned_long_long;
603 promoted_type = builtin->builtin_unsigned_long;
607 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
608 promoted_type = builtin->builtin_long_long;
610 promoted_type = builtin->builtin_long;
618 /* Promote both operands to common type. */
619 *arg1 = value_cast (promoted_type, *arg1);
620 *arg2 = value_cast (promoted_type, *arg2);
625 ptrmath_type_p (const struct language_defn *lang, struct type *type)
627 type = check_typedef (type);
628 if (TYPE_IS_REFERENCE (type))
629 type = TYPE_TARGET_TYPE (type);
631 switch (TYPE_CODE (type))
637 case TYPE_CODE_ARRAY:
638 return TYPE_VECTOR (type) ? 0 : lang->c_style_arrays;
645 /* Constructs a fake method with the given parameter types.
646 This function is used by the parser to construct an "expected"
647 type for method overload resolution. */
650 make_params (int num_types, struct type **param_types)
652 struct type *type = XCNEW (struct type);
653 TYPE_MAIN_TYPE (type) = XCNEW (struct main_type);
654 TYPE_LENGTH (type) = 1;
655 TYPE_CODE (type) = TYPE_CODE_METHOD;
656 TYPE_CHAIN (type) = type;
659 if (param_types[num_types - 1] == NULL)
662 TYPE_VARARGS (type) = 1;
664 else if (TYPE_CODE (check_typedef (param_types[num_types - 1]))
668 /* Caller should have ensured this. */
669 gdb_assert (num_types == 0);
670 TYPE_PROTOTYPED (type) = 1;
674 TYPE_NFIELDS (type) = num_types;
675 TYPE_FIELDS (type) = (struct field *)
676 TYPE_ZALLOC (type, sizeof (struct field) * num_types);
678 while (num_types-- > 0)
679 TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
684 /* Helper for evaluating an OP_VAR_VALUE. */
687 evaluate_var_value (enum noside noside, const block *blk, symbol *var)
689 /* JYG: We used to just return value_zero of the symbol type if
690 we're asked to avoid side effects. Otherwise we return
691 value_of_variable (...). However I'm not sure if
692 value_of_variable () has any side effect. We need a full value
693 object returned here for whatis_exp () to call evaluate_type ()
694 and then pass the full value to value_rtti_target_type () if we
695 are dealing with a pointer or reference to a base class and print
698 struct value *ret = NULL;
702 ret = value_of_variable (var, blk);
705 CATCH (except, RETURN_MASK_ERROR)
707 if (noside != EVAL_AVOID_SIDE_EFFECTS)
708 throw_exception (except);
710 ret = value_zero (SYMBOL_TYPE (var), not_lval);
717 /* Helper for evaluating an OP_VAR_MSYM_VALUE. */
720 evaluate_var_msym_value (enum noside noside,
721 struct objfile *objfile, minimal_symbol *msymbol)
723 if (noside == EVAL_AVOID_SIDE_EFFECTS)
725 type *the_type = find_minsym_type_and_address (msymbol, objfile, NULL);
726 return value_zero (the_type, not_lval);
731 type *the_type = find_minsym_type_and_address (msymbol, objfile, &address);
732 return value_at_lazy (the_type, address);
736 /* Helper for returning a value when handling EVAL_SKIP. */
739 eval_skip_value (expression *exp)
741 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
745 evaluate_subexp_standard (struct type *expect_type,
746 struct expression *exp, int *pos,
751 int pc, pc2 = 0, oldpos;
752 struct value *arg1 = NULL;
753 struct value *arg2 = NULL;
757 struct value **argvec;
761 struct type **arg_types;
763 struct symbol *function = NULL;
764 char *function_name = NULL;
765 const char *var_func_name = NULL;
768 op = exp->elts[pc].opcode;
773 tem = longest_to_int (exp->elts[pc + 2].longconst);
774 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
775 if (noside == EVAL_SKIP)
776 return eval_skip_value (exp);
777 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
778 &exp->elts[pc + 3].string,
779 expect_type, 0, noside);
781 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
786 return value_from_longest (exp->elts[pc + 1].type,
787 exp->elts[pc + 2].longconst);
791 return value_from_double (exp->elts[pc + 1].type,
792 exp->elts[pc + 2].doubleconst);
796 return value_from_decfloat (exp->elts[pc + 1].type,
797 exp->elts[pc + 2].decfloatconst);
802 if (noside == EVAL_SKIP)
803 return eval_skip_value (exp);
806 symbol *var = exp->elts[pc + 2].symbol;
807 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_ERROR)
808 error_unknown_type (SYMBOL_PRINT_NAME (var));
810 return evaluate_var_value (noside, exp->elts[pc + 1].block, var);
813 case OP_VAR_MSYM_VALUE:
817 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
818 value *val = evaluate_var_msym_value (noside,
819 exp->elts[pc + 1].objfile,
822 type = value_type (val);
823 if (TYPE_CODE (type) == TYPE_CODE_ERROR
824 && (noside != EVAL_AVOID_SIDE_EFFECTS || pc != 0))
825 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
829 case OP_VAR_ENTRY_VALUE:
831 if (noside == EVAL_SKIP)
832 return eval_skip_value (exp);
835 struct symbol *sym = exp->elts[pc + 1].symbol;
836 struct frame_info *frame;
838 if (noside == EVAL_AVOID_SIDE_EFFECTS)
839 return value_zero (SYMBOL_TYPE (sym), not_lval);
841 if (SYMBOL_COMPUTED_OPS (sym) == NULL
842 || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL)
843 error (_("Symbol \"%s\" does not have any specific entry value"),
844 SYMBOL_PRINT_NAME (sym));
846 frame = get_selected_frame (NULL);
847 return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
850 case OP_FUNC_STATIC_VAR:
851 tem = longest_to_int (exp->elts[pc + 1].longconst);
852 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
853 if (noside == EVAL_SKIP)
854 return eval_skip_value (exp);
857 value *func = evaluate_subexp_standard (NULL, exp, pos, noside);
858 CORE_ADDR addr = value_address (func);
860 const block *blk = block_for_pc (addr);
861 const char *var = &exp->elts[pc + 2].string;
863 struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL);
865 if (sym.symbol == NULL)
866 error (_("No symbol \"%s\" in specified context."), var);
868 return evaluate_var_value (noside, sym.block, sym.symbol);
874 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
878 const char *name = &exp->elts[pc + 2].string;
882 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
883 regno = user_reg_map_name_to_regnum (exp->gdbarch,
884 name, strlen (name));
886 error (_("Register $%s not available."), name);
888 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
889 a value with the appropriate register type. Unfortunately,
890 we don't have easy access to the type of user registers.
891 So for these registers, we fetch the register value regardless
892 of the evaluation mode. */
893 if (noside == EVAL_AVOID_SIDE_EFFECTS
894 && regno < gdbarch_num_regs (exp->gdbarch)
895 + gdbarch_num_pseudo_regs (exp->gdbarch))
896 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
898 val = value_of_register (regno, get_selected_frame (NULL));
900 error (_("Value of register %s not available."), name);
906 type = language_bool_type (exp->language_defn, exp->gdbarch);
907 return value_from_longest (type, exp->elts[pc + 1].longconst);
911 return value_of_internalvar (exp->gdbarch,
912 exp->elts[pc + 1].internalvar);
915 tem = longest_to_int (exp->elts[pc + 1].longconst);
916 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
917 if (noside == EVAL_SKIP)
918 return eval_skip_value (exp);
919 type = language_string_char_type (exp->language_defn, exp->gdbarch);
920 return value_string (&exp->elts[pc + 2].string, tem, type);
922 case OP_OBJC_NSSTRING: /* Objective C Foundation Class
923 NSString constant. */
924 tem = longest_to_int (exp->elts[pc + 1].longconst);
925 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
926 if (noside == EVAL_SKIP)
927 return eval_skip_value (exp);
928 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
932 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
933 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
934 nargs = tem3 - tem2 + 1;
935 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
937 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
938 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
940 struct value *rec = allocate_value (expect_type);
942 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
943 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
946 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
947 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
949 struct type *range_type = TYPE_INDEX_TYPE (type);
950 struct type *element_type = TYPE_TARGET_TYPE (type);
951 struct value *array = allocate_value (expect_type);
952 int element_size = TYPE_LENGTH (check_typedef (element_type));
953 LONGEST low_bound, high_bound, index;
955 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
958 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
961 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
962 for (tem = nargs; --nargs >= 0;)
964 struct value *element;
967 element = evaluate_subexp (element_type, exp, pos, noside);
968 if (value_type (element) != element_type)
969 element = value_cast (element_type, element);
972 int continue_pc = *pos;
975 index = init_array_element (array, element, exp, pos, noside,
976 low_bound, high_bound);
981 if (index > high_bound)
982 /* To avoid memory corruption. */
983 error (_("Too many array elements"));
984 memcpy (value_contents_raw (array)
985 + (index - low_bound) * element_size,
986 value_contents (element),
994 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
995 && TYPE_CODE (type) == TYPE_CODE_SET)
997 struct value *set = allocate_value (expect_type);
998 gdb_byte *valaddr = value_contents_raw (set);
999 struct type *element_type = TYPE_INDEX_TYPE (type);
1000 struct type *check_type = element_type;
1001 LONGEST low_bound, high_bound;
1003 /* Get targettype of elementtype. */
1004 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
1005 || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
1006 check_type = TYPE_TARGET_TYPE (check_type);
1008 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
1009 error (_("(power)set type with unknown size"));
1010 memset (valaddr, '\0', TYPE_LENGTH (type));
1011 for (tem = 0; tem < nargs; tem++)
1013 LONGEST range_low, range_high;
1014 struct type *range_low_type, *range_high_type;
1015 struct value *elem_val;
1017 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1018 range_low_type = range_high_type = value_type (elem_val);
1019 range_low = range_high = value_as_long (elem_val);
1021 /* Check types of elements to avoid mixture of elements from
1022 different types. Also check if type of element is "compatible"
1023 with element type of powerset. */
1024 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
1025 range_low_type = TYPE_TARGET_TYPE (range_low_type);
1026 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
1027 range_high_type = TYPE_TARGET_TYPE (range_high_type);
1028 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
1029 || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
1030 && (range_low_type != range_high_type)))
1031 /* different element modes. */
1032 error (_("POWERSET tuple elements of different mode"));
1033 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
1034 || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
1035 && range_low_type != check_type))
1036 error (_("incompatible POWERSET tuple elements"));
1037 if (range_low > range_high)
1039 warning (_("empty POWERSET tuple range"));
1042 if (range_low < low_bound || range_high > high_bound)
1043 error (_("POWERSET tuple element out of range"));
1044 range_low -= low_bound;
1045 range_high -= low_bound;
1046 for (; range_low <= range_high; range_low++)
1048 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
1050 if (gdbarch_bits_big_endian (exp->gdbarch))
1051 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
1052 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
1059 argvec = XALLOCAVEC (struct value *, nargs);
1060 for (tem = 0; tem < nargs; tem++)
1062 /* Ensure that array expressions are coerced into pointer
1064 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1066 if (noside == EVAL_SKIP)
1067 return eval_skip_value (exp);
1068 return value_array (tem2, tem3, argvec);
1072 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1074 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1076 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1078 if (noside == EVAL_SKIP)
1079 return eval_skip_value (exp);
1080 return value_slice (array, lowbound, upper - lowbound + 1);
1084 /* Skip third and second args to evaluate the first one. */
1085 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1086 if (value_logical_not (arg1))
1088 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1089 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1093 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1094 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1098 case OP_OBJC_SELECTOR:
1099 { /* Objective C @selector operator. */
1100 char *sel = &exp->elts[pc + 2].string;
1101 int len = longest_to_int (exp->elts[pc + 1].longconst);
1102 struct type *selector_type;
1104 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1105 if (noside == EVAL_SKIP)
1106 return eval_skip_value (exp);
1109 sel[len] = 0; /* Make sure it's terminated. */
1111 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1112 return value_from_longest (selector_type,
1113 lookup_child_selector (exp->gdbarch, sel));
1116 case OP_OBJC_MSGCALL:
1117 { /* Objective C message (method) call. */
1119 CORE_ADDR responds_selector = 0;
1120 CORE_ADDR method_selector = 0;
1122 CORE_ADDR selector = 0;
1124 int struct_return = 0;
1125 enum noside sub_no_side = EVAL_NORMAL;
1127 struct value *msg_send = NULL;
1128 struct value *msg_send_stret = NULL;
1129 int gnu_runtime = 0;
1131 struct value *target = NULL;
1132 struct value *method = NULL;
1133 struct value *called_method = NULL;
1135 struct type *selector_type = NULL;
1136 struct type *long_type;
1138 struct value *ret = NULL;
1141 selector = exp->elts[pc + 1].longconst;
1142 nargs = exp->elts[pc + 2].longconst;
1143 argvec = XALLOCAVEC (struct value *, nargs + 5);
1147 long_type = builtin_type (exp->gdbarch)->builtin_long;
1148 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1150 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1151 sub_no_side = EVAL_NORMAL;
1153 sub_no_side = noside;
1155 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1157 if (value_as_long (target) == 0)
1158 return value_from_longest (long_type, 0);
1160 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym)
1163 /* Find the method dispatch (Apple runtime) or method lookup
1164 (GNU runtime) function for Objective-C. These will be used
1165 to lookup the symbol information for the method. If we
1166 can't find any symbol information, then we'll use these to
1167 call the method, otherwise we can call the method
1168 directly. The msg_send_stret function is used in the special
1169 case of a method that returns a structure (Apple runtime
1173 struct type *type = selector_type;
1175 type = lookup_function_type (type);
1176 type = lookup_pointer_type (type);
1177 type = lookup_function_type (type);
1178 type = lookup_pointer_type (type);
1180 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1182 = find_function_in_inferior ("objc_msg_lookup", NULL);
1184 msg_send = value_from_pointer (type, value_as_address (msg_send));
1185 msg_send_stret = value_from_pointer (type,
1186 value_as_address (msg_send_stret));
1190 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1191 /* Special dispatcher for methods returning structs. */
1193 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1196 /* Verify the target object responds to this method. The
1197 standard top-level 'Object' class uses a different name for
1198 the verification method than the non-standard, but more
1199 often used, 'NSObject' class. Make sure we check for both. */
1202 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1203 if (responds_selector == 0)
1205 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1207 if (responds_selector == 0)
1208 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1211 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1212 if (method_selector == 0)
1214 = lookup_child_selector (exp->gdbarch, "methodFor:");
1216 if (method_selector == 0)
1217 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1219 /* Call the verification method, to make sure that the target
1220 class implements the desired method. */
1222 argvec[0] = msg_send;
1224 argvec[2] = value_from_longest (long_type, responds_selector);
1225 argvec[3] = value_from_longest (long_type, selector);
1228 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1231 /* Function objc_msg_lookup returns a pointer. */
1233 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1235 if (value_as_long (ret) == 0)
1236 error (_("Target does not respond to this message selector."));
1238 /* Call "methodForSelector:" method, to get the address of a
1239 function method that implements this selector for this
1240 class. If we can find a symbol at that address, then we
1241 know the return type, parameter types etc. (that's a good
1244 argvec[0] = msg_send;
1246 argvec[2] = value_from_longest (long_type, method_selector);
1247 argvec[3] = value_from_longest (long_type, selector);
1250 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1254 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1257 /* ret should now be the selector. */
1259 addr = value_as_long (ret);
1262 struct symbol *sym = NULL;
1264 /* The address might point to a function descriptor;
1265 resolve it to the actual code address instead. */
1266 addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
1269 /* Is it a high_level symbol? */
1270 sym = find_pc_function (addr);
1272 method = value_of_variable (sym, 0);
1275 /* If we found a method with symbol information, check to see
1276 if it returns a struct. Otherwise assume it doesn't. */
1281 struct type *val_type;
1283 funaddr = find_function_addr (method, &val_type);
1285 block_for_pc (funaddr);
1287 val_type = check_typedef (val_type);
1289 if ((val_type == NULL)
1290 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1292 if (expect_type != NULL)
1293 val_type = expect_type;
1296 struct_return = using_struct_return (exp->gdbarch, method,
1299 else if (expect_type != NULL)
1301 struct_return = using_struct_return (exp->gdbarch, NULL,
1302 check_typedef (expect_type));
1305 /* Found a function symbol. Now we will substitute its
1306 value in place of the message dispatcher (obj_msgSend),
1307 so that we call the method directly instead of thru
1308 the dispatcher. The main reason for doing this is that
1309 we can now evaluate the return value and parameter values
1310 according to their known data types, in case we need to
1311 do things like promotion, dereferencing, special handling
1312 of structs and doubles, etc.
1314 We want to use the type signature of 'method', but still
1315 jump to objc_msgSend() or objc_msgSend_stret() to better
1316 mimic the behavior of the runtime. */
1320 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1321 error (_("method address has symbol information "
1322 "with non-function type; skipping"));
1324 /* Create a function pointer of the appropriate type, and
1325 replace its value with the value of msg_send or
1326 msg_send_stret. We must use a pointer here, as
1327 msg_send and msg_send_stret are of pointer type, and
1328 the representation may be different on systems that use
1329 function descriptors. */
1332 = value_from_pointer (lookup_pointer_type (value_type (method)),
1333 value_as_address (msg_send_stret));
1336 = value_from_pointer (lookup_pointer_type (value_type (method)),
1337 value_as_address (msg_send));
1342 called_method = msg_send_stret;
1344 called_method = msg_send;
1347 if (noside == EVAL_SKIP)
1348 return eval_skip_value (exp);
1350 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1352 /* If the return type doesn't look like a function type,
1353 call an error. This can happen if somebody tries to
1354 turn a variable into a function call. This is here
1355 because people often want to call, eg, strcmp, which
1356 gdb doesn't know is a function. If gdb isn't asked for
1357 it's opinion (ie. through "whatis"), it won't offer
1360 struct type *type = value_type (called_method);
1362 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1363 type = TYPE_TARGET_TYPE (type);
1364 type = TYPE_TARGET_TYPE (type);
1368 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1369 return allocate_value (expect_type);
1371 return allocate_value (type);
1374 error (_("Expression of type other than "
1375 "\"method returning ...\" used as a method"));
1378 /* Now depending on whether we found a symbol for the method,
1379 we will either call the runtime dispatcher or the method
1382 argvec[0] = called_method;
1384 argvec[2] = value_from_longest (long_type, selector);
1385 /* User-supplied arguments. */
1386 for (tem = 0; tem < nargs; tem++)
1387 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1388 argvec[tem + 3] = 0;
1390 if (gnu_runtime && (method != NULL))
1392 /* Function objc_msg_lookup returns a pointer. */
1393 deprecated_set_value_type (argvec[0],
1394 lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
1396 = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1399 ret = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1406 op = exp->elts[*pos].opcode;
1407 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1408 /* Allocate arg vector, including space for the function to be
1409 called in argvec[0], a potential `this', and a terminating NULL. */
1410 argvec = (struct value **)
1411 alloca (sizeof (struct value *) * (nargs + 3));
1412 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1414 /* First, evaluate the structure into arg2. */
1417 if (op == STRUCTOP_MEMBER)
1419 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1423 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1426 /* If the function is a virtual function, then the
1427 aggregate value (providing the structure) plays
1428 its part by providing the vtable. Otherwise,
1429 it is just along for the ride: call the function
1432 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1434 type = check_typedef (value_type (arg1));
1435 if (noside == EVAL_SKIP)
1436 tem = 1; /* Set it to the right arg index so that all arguments
1437 can also be skipped. */
1438 else if (TYPE_CODE (type) == TYPE_CODE_METHODPTR)
1440 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1441 arg1 = value_zero (TYPE_TARGET_TYPE (type), not_lval);
1443 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1445 /* Now, say which argument to start evaluating from. */
1450 else if (TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
1452 struct type *type_ptr
1453 = lookup_pointer_type (TYPE_SELF_TYPE (type));
1454 struct type *target_type_ptr
1455 = lookup_pointer_type (TYPE_TARGET_TYPE (type));
1457 /* Now, convert these values to an address. */
1458 arg2 = value_cast (type_ptr, arg2);
1460 mem_offset = value_as_long (arg1);
1462 arg1 = value_from_pointer (target_type_ptr,
1463 value_as_long (arg2) + mem_offset);
1464 arg1 = value_ind (arg1);
1468 error (_("Non-pointer-to-member value used in pointer-to-member "
1471 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1473 /* Hair for method invocations. */
1477 /* First, evaluate the structure into arg2. */
1479 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1480 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1482 if (op == STRUCTOP_STRUCT)
1484 /* If v is a variable in a register, and the user types
1485 v.method (), this will produce an error, because v has
1488 A possible way around this would be to allocate a
1489 copy of the variable on the stack, copy in the
1490 contents, call the function, and copy out the
1491 contents. I.e. convert this from call by reference
1492 to call by copy-return (or whatever it's called).
1493 However, this does not work because it is not the
1494 same: the method being called could stash a copy of
1495 the address, and then future uses through that address
1496 (after the method returns) would be expected to
1497 use the variable itself, not some copy of it. */
1498 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1502 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1504 /* Check to see if the operator '->' has been
1505 overloaded. If the operator has been overloaded
1506 replace arg2 with the value returned by the custom
1507 operator and continue evaluation. */
1508 while (unop_user_defined_p (op, arg2))
1510 struct value *value = NULL;
1513 value = value_x_unop (arg2, op, noside);
1516 CATCH (except, RETURN_MASK_ERROR)
1518 if (except.error == NOT_FOUND_ERROR)
1521 throw_exception (except);
1528 /* Now, say which argument to start evaluating from. */
1531 else if (op == OP_SCOPE
1532 && overload_resolution
1533 && (exp->language_defn->la_language == language_cplus))
1535 /* Unpack it locally so we can properly handle overload
1541 local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
1542 (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
1543 type = exp->elts[pc2 + 1].type;
1544 name = &exp->elts[pc2 + 3].string;
1547 function_name = NULL;
1548 if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
1550 function = cp_lookup_symbol_namespace (TYPE_TAG_NAME (type),
1552 get_selected_block (0),
1554 if (function == NULL)
1555 error (_("No symbol \"%s\" in namespace \"%s\"."),
1556 name, TYPE_TAG_NAME (type));
1559 /* arg2 is left as NULL on purpose. */
1563 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1564 || TYPE_CODE (type) == TYPE_CODE_UNION);
1565 function_name = name;
1567 /* We need a properly typed value for method lookup. For
1568 static methods arg2 is otherwise unused. */
1569 arg2 = value_zero (type, lval_memory);
1574 else if (op == OP_ADL_FUNC)
1576 /* Save the function position and move pos so that the arguments
1577 can be evaluated. */
1583 func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst);
1584 (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1);
1588 /* Non-method function call. */
1592 /* If this is a C++ function wait until overload resolution. */
1593 if (op == OP_VAR_VALUE
1594 && overload_resolution
1595 && (exp->language_defn->la_language == language_cplus))
1597 (*pos) += 4; /* Skip the evaluation of the symbol. */
1602 if (op == OP_VAR_MSYM_VALUE)
1604 symbol *sym = exp->elts[*pos + 2].symbol;
1605 var_func_name = SYMBOL_PRINT_NAME (sym);
1607 else if (op == OP_VAR_VALUE)
1609 minimal_symbol *msym = exp->elts[*pos + 2].msymbol;
1610 var_func_name = MSYMBOL_PRINT_NAME (msym);
1613 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1614 type = value_type (argvec[0]);
1615 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1616 type = TYPE_TARGET_TYPE (type);
1617 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1619 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1621 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type,
1629 /* Evaluate arguments (if not already done, e.g., namespace::func()
1630 and overload-resolution is off). */
1631 for (; tem <= nargs; tem++)
1633 /* Ensure that array expressions are coerced into pointer
1635 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1638 /* Signal end of arglist. */
1641 if (noside == EVAL_SKIP)
1642 return eval_skip_value (exp);
1644 if (op == OP_ADL_FUNC)
1646 struct symbol *symp;
1649 int string_pc = save_pos1 + 3;
1651 /* Extract the function name. */
1652 name_len = longest_to_int (exp->elts[string_pc].longconst);
1653 func_name = (char *) alloca (name_len + 1);
1654 strcpy (func_name, &exp->elts[string_pc + 1].string);
1656 find_overload_match (&argvec[1], nargs, func_name,
1657 NON_METHOD, /* not method */
1658 NULL, NULL, /* pass NULL symbol since
1659 symbol is unknown */
1660 NULL, &symp, NULL, 0, noside);
1662 /* Now fix the expression being evaluated. */
1663 exp->elts[save_pos1 + 2].symbol = symp;
1664 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1667 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
1668 || (op == OP_SCOPE && function_name != NULL))
1670 int static_memfuncp;
1673 /* Method invocation: stuff "this" as first parameter.
1674 If the method turns out to be static we undo this below. */
1679 /* Name of method from expression. */
1680 tstr = &exp->elts[pc2 + 2].string;
1683 tstr = function_name;
1685 if (overload_resolution && (exp->language_defn->la_language
1688 /* Language is C++, do some overload resolution before
1690 struct value *valp = NULL;
1692 (void) find_overload_match (&argvec[1], nargs, tstr,
1693 METHOD, /* method */
1694 &arg2, /* the object */
1696 &static_memfuncp, 0, noside);
1698 if (op == OP_SCOPE && !static_memfuncp)
1700 /* For the time being, we don't handle this. */
1701 error (_("Call to overloaded function %s requires "
1705 argvec[1] = arg2; /* the ``this'' pointer */
1706 argvec[0] = valp; /* Use the method found after overload
1710 /* Non-C++ case -- or no overload resolution. */
1712 struct value *temp = arg2;
1714 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1716 op == STRUCTOP_STRUCT
1717 ? "structure" : "structure pointer");
1718 /* value_struct_elt updates temp with the correct value
1719 of the ``this'' pointer if necessary, so modify argvec[1] to
1720 reflect any ``this'' changes. */
1722 = value_from_longest (lookup_pointer_type(value_type (temp)),
1723 value_address (temp)
1724 + value_embedded_offset (temp));
1725 argvec[1] = arg2; /* the ``this'' pointer */
1728 /* Take out `this' if needed. */
1729 if (static_memfuncp)
1731 argvec[1] = argvec[0];
1736 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1738 /* Pointer to member. argvec[1] is already set up. */
1741 else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
1743 /* Non-member function being called. */
1744 /* fn: This can only be done for C++ functions. A C-style function
1745 in a C++ program, for instance, does not have the fields that
1746 are expected here. */
1748 if (overload_resolution && (exp->language_defn->la_language
1751 /* Language is C++, do some overload resolution before
1753 struct symbol *symp;
1756 /* If a scope has been specified disable ADL. */
1760 if (op == OP_VAR_VALUE)
1761 function = exp->elts[save_pos1+2].symbol;
1763 (void) find_overload_match (&argvec[1], nargs,
1764 NULL, /* no need for name */
1765 NON_METHOD, /* not method */
1766 NULL, function, /* the function */
1767 NULL, &symp, NULL, no_adl, noside);
1769 if (op == OP_VAR_VALUE)
1771 /* Now fix the expression being evaluated. */
1772 exp->elts[save_pos1+2].symbol = symp;
1773 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
1777 argvec[0] = value_of_variable (symp, get_selected_block (0));
1781 /* Not C++, or no overload resolution allowed. */
1782 /* Nothing to be done; argvec already correctly set up. */
1787 /* It is probably a C-style function. */
1788 /* Nothing to be done; argvec already correctly set up. */
1793 if (argvec[0] == NULL)
1794 error (_("Cannot evaluate function -- may be inlined"));
1795 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1797 /* If the return type doesn't look like a function type,
1798 call an error. This can happen if somebody tries to turn
1799 a variable into a function call. */
1801 struct type *ftype = value_type (argvec[0]);
1803 if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
1805 /* We don't know anything about what the internal
1806 function might return, but we have to return
1808 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
1811 else if (TYPE_CODE (ftype) == TYPE_CODE_XMETHOD)
1813 struct type *return_type
1814 = result_type_of_xmethod (argvec[0], nargs, argvec + 1);
1816 if (return_type == NULL)
1817 error (_("Xmethod is missing return type."));
1818 return value_zero (return_type, not_lval);
1820 else if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
1821 || TYPE_CODE (ftype) == TYPE_CODE_METHOD)
1823 struct type *return_type = TYPE_TARGET_TYPE (ftype);
1825 if (return_type == NULL)
1826 return_type = expect_type;
1828 if (return_type == NULL)
1829 error_call_unknown_return_type (var_func_name);
1831 return allocate_value (return_type);
1834 error (_("Expression of type other than "
1835 "\"Function returning ...\" used as function"));
1837 switch (TYPE_CODE (value_type (argvec[0])))
1839 case TYPE_CODE_INTERNAL_FUNCTION:
1840 return call_internal_function (exp->gdbarch, exp->language_defn,
1841 argvec[0], nargs, argvec + 1);
1842 case TYPE_CODE_XMETHOD:
1843 return call_xmethod (argvec[0], nargs, argvec + 1);
1845 return call_function_by_hand (argvec[0],
1846 expect_type, nargs, argvec + 1);
1848 /* pai: FIXME save value from call_function_by_hand, then adjust
1849 pc by adjust_fn_pc if +ve. */
1851 case OP_F77_UNDETERMINED_ARGLIST:
1853 /* Remember that in F77, functions, substring ops and
1854 array subscript operations cannot be disambiguated
1855 at parse time. We have made all array subscript operations,
1856 substring operations as well as function calls come here
1857 and we now have to discover what the heck this thing actually was.
1858 If it is a function, we process just as if we got an OP_FUNCALL. */
1860 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1863 /* First determine the type code we are dealing with. */
1864 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1865 type = check_typedef (value_type (arg1));
1866 code = TYPE_CODE (type);
1868 if (code == TYPE_CODE_PTR)
1870 /* Fortran always passes variable to subroutines as pointer.
1871 So we need to look into its target type to see if it is
1872 array, string or function. If it is, we need to switch
1873 to the target value the original one points to. */
1874 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1876 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1877 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1878 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1880 arg1 = value_ind (arg1);
1881 type = check_typedef (value_type (arg1));
1882 code = TYPE_CODE (type);
1888 case TYPE_CODE_ARRAY:
1889 if (exp->elts[*pos].opcode == OP_RANGE)
1890 return value_f90_subarray (arg1, exp, pos, noside);
1892 goto multi_f77_subscript;
1894 case TYPE_CODE_STRING:
1895 if (exp->elts[*pos].opcode == OP_RANGE)
1896 return value_f90_subarray (arg1, exp, pos, noside);
1899 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1900 return value_subscript (arg1, value_as_long (arg2));
1904 case TYPE_CODE_FUNC:
1905 /* It's a function call. */
1906 /* Allocate arg vector, including space for the function to be
1907 called in argvec[0] and a terminating NULL. */
1908 argvec = (struct value **)
1909 alloca (sizeof (struct value *) * (nargs + 2));
1912 for (; tem <= nargs; tem++)
1913 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1914 argvec[tem] = 0; /* signal end of arglist */
1915 if (noside == EVAL_SKIP)
1916 return eval_skip_value (exp);
1920 error (_("Cannot perform substring on this type"));
1924 /* We have a complex number, There should be 2 floating
1925 point numbers that compose it. */
1927 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1928 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1930 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1932 case STRUCTOP_STRUCT:
1933 tem = longest_to_int (exp->elts[pc + 1].longconst);
1934 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1935 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1936 if (noside == EVAL_SKIP)
1937 return eval_skip_value (exp);
1938 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
1940 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1941 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
1945 tem = longest_to_int (exp->elts[pc + 1].longconst);
1946 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1947 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1948 if (noside == EVAL_SKIP)
1949 return eval_skip_value (exp);
1951 /* Check to see if operator '->' has been overloaded. If so replace
1952 arg1 with the value returned by evaluating operator->(). */
1953 while (unop_user_defined_p (op, arg1))
1955 struct value *value = NULL;
1958 value = value_x_unop (arg1, op, noside);
1961 CATCH (except, RETURN_MASK_ERROR)
1963 if (except.error == NOT_FOUND_ERROR)
1966 throw_exception (except);
1973 /* JYG: if print object is on we need to replace the base type
1974 with rtti type in order to continue on with successful
1975 lookup of member / method only available in the rtti type. */
1977 struct type *type = value_type (arg1);
1978 struct type *real_type;
1979 int full, using_enc;
1981 struct value_print_options opts;
1983 get_user_print_options (&opts);
1984 if (opts.objectprint && TYPE_TARGET_TYPE(type)
1985 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
1987 real_type = value_rtti_indirect_type (arg1, &full, &top,
1990 arg1 = value_cast (real_type, arg1);
1994 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
1995 NULL, "structure pointer");
1996 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1997 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
2000 case STRUCTOP_MEMBER:
2002 if (op == STRUCTOP_MEMBER)
2003 arg1 = evaluate_subexp_for_address (exp, pos, noside);
2005 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2007 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2009 if (noside == EVAL_SKIP)
2010 return eval_skip_value (exp);
2012 type = check_typedef (value_type (arg2));
2013 switch (TYPE_CODE (type))
2015 case TYPE_CODE_METHODPTR:
2016 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2017 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
2020 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
2021 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
2022 return value_ind (arg2);
2025 case TYPE_CODE_MEMBERPTR:
2026 /* Now, convert these values to an address. */
2027 arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)),
2030 mem_offset = value_as_long (arg2);
2032 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2033 value_as_long (arg1) + mem_offset);
2034 return value_ind (arg3);
2037 error (_("non-pointer-to-member value used "
2038 "in pointer-to-member construct"));
2042 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2043 arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
2044 for (ix = 0; ix < nargs; ++ix)
2045 arg_types[ix] = exp->elts[pc + 1 + ix + 1].type;
2047 expect_type = make_params (nargs, arg_types);
2048 *(pos) += 3 + nargs;
2049 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
2050 xfree (TYPE_FIELDS (expect_type));
2051 xfree (TYPE_MAIN_TYPE (expect_type));
2052 xfree (expect_type);
2056 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2057 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2058 if (noside == EVAL_SKIP)
2059 return eval_skip_value (exp);
2060 if (binop_user_defined_p (op, arg1, arg2))
2061 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2063 return value_concat (arg1, arg2);
2066 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2067 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2069 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2071 if (binop_user_defined_p (op, arg1, arg2))
2072 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2074 return value_assign (arg1, arg2);
2076 case BINOP_ASSIGN_MODIFY:
2078 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2079 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2080 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2082 op = exp->elts[pc + 1].opcode;
2083 if (binop_user_defined_p (op, arg1, arg2))
2084 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
2085 else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn,
2087 && is_integral_type (value_type (arg2)))
2088 arg2 = value_ptradd (arg1, value_as_long (arg2));
2089 else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn,
2091 && is_integral_type (value_type (arg2)))
2092 arg2 = value_ptradd (arg1, - value_as_long (arg2));
2095 struct value *tmp = arg1;
2097 /* For shift and integer exponentiation operations,
2098 only promote the first argument. */
2099 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2100 && is_integral_type (value_type (arg2)))
2101 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
2103 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2105 arg2 = value_binop (tmp, arg2, op);
2107 return value_assign (arg1, arg2);
2110 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2111 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2112 if (noside == EVAL_SKIP)
2113 return eval_skip_value (exp);
2114 if (binop_user_defined_p (op, arg1, arg2))
2115 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2116 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2117 && is_integral_type (value_type (arg2)))
2118 return value_ptradd (arg1, value_as_long (arg2));
2119 else if (ptrmath_type_p (exp->language_defn, value_type (arg2))
2120 && is_integral_type (value_type (arg1)))
2121 return value_ptradd (arg2, value_as_long (arg1));
2124 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2125 return value_binop (arg1, arg2, BINOP_ADD);
2129 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2130 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2131 if (noside == EVAL_SKIP)
2132 return eval_skip_value (exp);
2133 if (binop_user_defined_p (op, arg1, arg2))
2134 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2135 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2136 && ptrmath_type_p (exp->language_defn, value_type (arg2)))
2138 /* FIXME -- should be ptrdiff_t */
2139 type = builtin_type (exp->gdbarch)->builtin_long;
2140 return value_from_longest (type, value_ptrdiff (arg1, arg2));
2142 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2143 && is_integral_type (value_type (arg2)))
2144 return value_ptradd (arg1, - value_as_long (arg2));
2147 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2148 return value_binop (arg1, arg2, BINOP_SUB);
2159 case BINOP_BITWISE_AND:
2160 case BINOP_BITWISE_IOR:
2161 case BINOP_BITWISE_XOR:
2162 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2163 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2164 if (noside == EVAL_SKIP)
2165 return eval_skip_value (exp);
2166 if (binop_user_defined_p (op, arg1, arg2))
2167 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2170 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2171 fudge arg2 to avoid division-by-zero, the caller is
2172 (theoretically) only looking for the type of the result. */
2173 if (noside == EVAL_AVOID_SIDE_EFFECTS
2174 /* ??? Do we really want to test for BINOP_MOD here?
2175 The implementation of value_binop gives it a well-defined
2178 || op == BINOP_INTDIV
2181 && value_logical_not (arg2))
2183 struct value *v_one, *retval;
2185 v_one = value_one (value_type (arg2));
2186 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
2187 retval = value_binop (arg1, v_one, op);
2192 /* For shift and integer exponentiation operations,
2193 only promote the first argument. */
2194 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2195 && is_integral_type (value_type (arg2)))
2196 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2198 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2200 return value_binop (arg1, arg2, op);
2204 case BINOP_SUBSCRIPT:
2205 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2206 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2207 if (noside == EVAL_SKIP)
2208 return eval_skip_value (exp);
2209 if (binop_user_defined_p (op, arg1, arg2))
2210 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2213 /* If the user attempts to subscript something that is not an
2214 array or pointer type (like a plain int variable for example),
2215 then report this as an error. */
2217 arg1 = coerce_ref (arg1);
2218 type = check_typedef (value_type (arg1));
2219 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
2220 && TYPE_CODE (type) != TYPE_CODE_PTR)
2222 if (TYPE_NAME (type))
2223 error (_("cannot subscript something of type `%s'"),
2226 error (_("cannot subscript requested type"));
2229 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2230 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
2232 return value_subscript (arg1, value_as_long (arg2));
2234 case MULTI_SUBSCRIPT:
2236 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2237 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2240 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2241 /* FIXME: EVAL_SKIP handling may not be correct. */
2242 if (noside == EVAL_SKIP)
2246 return eval_skip_value (exp);
2248 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2249 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2251 /* If the user attempts to subscript something that has no target
2252 type (like a plain int variable for example), then report this
2255 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
2258 arg1 = value_zero (type, VALUE_LVAL (arg1));
2264 error (_("cannot subscript something of type `%s'"),
2265 TYPE_NAME (value_type (arg1)));
2269 if (binop_user_defined_p (op, arg1, arg2))
2271 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
2275 arg1 = coerce_ref (arg1);
2276 type = check_typedef (value_type (arg1));
2278 switch (TYPE_CODE (type))
2281 case TYPE_CODE_ARRAY:
2282 case TYPE_CODE_STRING:
2283 arg1 = value_subscript (arg1, value_as_long (arg2));
2287 if (TYPE_NAME (type))
2288 error (_("cannot subscript something of type `%s'"),
2291 error (_("cannot subscript requested type"));
2297 multi_f77_subscript:
2299 LONGEST subscript_array[MAX_FORTRAN_DIMS];
2300 int ndimensions = 1, i;
2301 struct value *array = arg1;
2303 if (nargs > MAX_FORTRAN_DIMS)
2304 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
2306 ndimensions = calc_f77_array_dims (type);
2308 if (nargs != ndimensions)
2309 error (_("Wrong number of subscripts"));
2311 gdb_assert (nargs > 0);
2313 /* Now that we know we have a legal array subscript expression
2314 let us actually find out where this element exists in the array. */
2316 /* Take array indices left to right. */
2317 for (i = 0; i < nargs; i++)
2319 /* Evaluate each subscript; it must be a legal integer in F77. */
2320 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2322 /* Fill in the subscript array. */
2324 subscript_array[i] = value_as_long (arg2);
2327 /* Internal type of array is arranged right to left. */
2328 for (i = nargs; i > 0; i--)
2330 struct type *array_type = check_typedef (value_type (array));
2331 LONGEST index = subscript_array[i - 1];
2333 array = value_subscripted_rvalue (array, index,
2334 f77_get_lowerbound (array_type));
2340 case BINOP_LOGICAL_AND:
2341 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2342 if (noside == EVAL_SKIP)
2344 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2345 return eval_skip_value (exp);
2349 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2352 if (binop_user_defined_p (op, arg1, arg2))
2354 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2355 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2359 tem = value_logical_not (arg1);
2360 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2361 (tem ? EVAL_SKIP : noside));
2362 type = language_bool_type (exp->language_defn, exp->gdbarch);
2363 return value_from_longest (type,
2364 (LONGEST) (!tem && !value_logical_not (arg2)));
2367 case BINOP_LOGICAL_OR:
2368 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2369 if (noside == EVAL_SKIP)
2371 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2372 return eval_skip_value (exp);
2376 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2379 if (binop_user_defined_p (op, arg1, arg2))
2381 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2382 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2386 tem = value_logical_not (arg1);
2387 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2388 (!tem ? EVAL_SKIP : noside));
2389 type = language_bool_type (exp->language_defn, exp->gdbarch);
2390 return value_from_longest (type,
2391 (LONGEST) (!tem || !value_logical_not (arg2)));
2395 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2396 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2397 if (noside == EVAL_SKIP)
2398 return eval_skip_value (exp);
2399 if (binop_user_defined_p (op, arg1, arg2))
2401 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2405 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2406 tem = value_equal (arg1, arg2);
2407 type = language_bool_type (exp->language_defn, exp->gdbarch);
2408 return value_from_longest (type, (LONGEST) tem);
2411 case BINOP_NOTEQUAL:
2412 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2413 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2414 if (noside == EVAL_SKIP)
2415 return eval_skip_value (exp);
2416 if (binop_user_defined_p (op, arg1, arg2))
2418 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2422 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2423 tem = value_equal (arg1, arg2);
2424 type = language_bool_type (exp->language_defn, exp->gdbarch);
2425 return value_from_longest (type, (LONGEST) ! tem);
2429 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2430 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2431 if (noside == EVAL_SKIP)
2432 return eval_skip_value (exp);
2433 if (binop_user_defined_p (op, arg1, arg2))
2435 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2439 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2440 tem = value_less (arg1, arg2);
2441 type = language_bool_type (exp->language_defn, exp->gdbarch);
2442 return value_from_longest (type, (LONGEST) tem);
2446 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2447 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2448 if (noside == EVAL_SKIP)
2449 return eval_skip_value (exp);
2450 if (binop_user_defined_p (op, arg1, arg2))
2452 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2456 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2457 tem = value_less (arg2, arg1);
2458 type = language_bool_type (exp->language_defn, exp->gdbarch);
2459 return value_from_longest (type, (LONGEST) tem);
2463 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2464 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2465 if (noside == EVAL_SKIP)
2466 return eval_skip_value (exp);
2467 if (binop_user_defined_p (op, arg1, arg2))
2469 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2473 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2474 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2475 type = language_bool_type (exp->language_defn, exp->gdbarch);
2476 return value_from_longest (type, (LONGEST) tem);
2480 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2481 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2482 if (noside == EVAL_SKIP)
2483 return eval_skip_value (exp);
2484 if (binop_user_defined_p (op, arg1, arg2))
2486 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2490 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2491 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2492 type = language_bool_type (exp->language_defn, exp->gdbarch);
2493 return value_from_longest (type, (LONGEST) tem);
2497 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2498 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2499 if (noside == EVAL_SKIP)
2500 return eval_skip_value (exp);
2501 type = check_typedef (value_type (arg2));
2502 if (TYPE_CODE (type) != TYPE_CODE_INT
2503 && TYPE_CODE (type) != TYPE_CODE_ENUM)
2504 error (_("Non-integral right operand for \"@\" operator."));
2505 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2507 return allocate_repeat_value (value_type (arg1),
2508 longest_to_int (value_as_long (arg2)));
2511 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2514 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2515 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2518 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2519 if (noside == EVAL_SKIP)
2520 return eval_skip_value (exp);
2521 if (unop_user_defined_p (op, arg1))
2522 return value_x_unop (arg1, op, noside);
2525 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2526 return value_pos (arg1);
2530 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2531 if (noside == EVAL_SKIP)
2532 return eval_skip_value (exp);
2533 if (unop_user_defined_p (op, arg1))
2534 return value_x_unop (arg1, op, noside);
2537 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2538 return value_neg (arg1);
2541 case UNOP_COMPLEMENT:
2542 /* C++: check for and handle destructor names. */
2544 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2545 if (noside == EVAL_SKIP)
2546 return eval_skip_value (exp);
2547 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2548 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2551 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2552 return value_complement (arg1);
2555 case UNOP_LOGICAL_NOT:
2556 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2557 if (noside == EVAL_SKIP)
2558 return eval_skip_value (exp);
2559 if (unop_user_defined_p (op, arg1))
2560 return value_x_unop (arg1, op, noside);
2563 type = language_bool_type (exp->language_defn, exp->gdbarch);
2564 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2568 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2569 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2570 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2571 type = check_typedef (value_type (arg1));
2572 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2573 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2574 error (_("Attempt to dereference pointer "
2575 "to member without an object"));
2576 if (noside == EVAL_SKIP)
2577 return eval_skip_value (exp);
2578 if (unop_user_defined_p (op, arg1))
2579 return value_x_unop (arg1, op, noside);
2580 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2582 type = check_typedef (value_type (arg1));
2583 if (TYPE_CODE (type) == TYPE_CODE_PTR
2584 || TYPE_IS_REFERENCE (type)
2585 /* In C you can dereference an array to get the 1st elt. */
2586 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2588 return value_zero (TYPE_TARGET_TYPE (type),
2590 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2591 /* GDB allows dereferencing an int. */
2592 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2595 error (_("Attempt to take contents of a non-pointer value."));
2598 /* Allow * on an integer so we can cast it to whatever we want.
2599 This returns an int, which seems like the most C-like thing to
2600 do. "long long" variables are rare enough that
2601 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2602 if (TYPE_CODE (type) == TYPE_CODE_INT)
2603 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2604 (CORE_ADDR) value_as_address (arg1));
2605 return value_ind (arg1);
2608 /* C++: check for and handle pointer to members. */
2610 if (noside == EVAL_SKIP)
2612 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2613 return eval_skip_value (exp);
2617 struct value *retvalp = evaluate_subexp_for_address (exp, pos,
2624 if (noside == EVAL_SKIP)
2626 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2627 return eval_skip_value (exp);
2629 return evaluate_subexp_for_sizeof (exp, pos, noside);
2633 type = exp->elts[pc + 1].type;
2634 return evaluate_subexp_for_cast (exp, pos, noside, type);
2636 case UNOP_CAST_TYPE:
2637 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2638 type = value_type (arg1);
2639 return evaluate_subexp_for_cast (exp, pos, noside, type);
2641 case UNOP_DYNAMIC_CAST:
2642 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2643 type = value_type (arg1);
2644 arg1 = evaluate_subexp (type, exp, pos, noside);
2645 if (noside == EVAL_SKIP)
2646 return eval_skip_value (exp);
2647 return value_dynamic_cast (type, arg1);
2649 case UNOP_REINTERPRET_CAST:
2650 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2651 type = value_type (arg1);
2652 arg1 = evaluate_subexp (type, exp, pos, noside);
2653 if (noside == EVAL_SKIP)
2654 return eval_skip_value (exp);
2655 return value_reinterpret_cast (type, arg1);
2659 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2660 if (noside == EVAL_SKIP)
2661 return eval_skip_value (exp);
2662 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2663 return value_zero (exp->elts[pc + 1].type, lval_memory);
2665 return value_at_lazy (exp->elts[pc + 1].type,
2666 value_as_address (arg1));
2668 case UNOP_MEMVAL_TYPE:
2669 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2670 type = value_type (arg1);
2671 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2672 if (noside == EVAL_SKIP)
2673 return eval_skip_value (exp);
2674 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2675 return value_zero (type, lval_memory);
2677 return value_at_lazy (type, value_as_address (arg1));
2679 case UNOP_PREINCREMENT:
2680 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2681 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2683 else if (unop_user_defined_p (op, arg1))
2685 return value_x_unop (arg1, op, noside);
2689 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2690 arg2 = value_ptradd (arg1, 1);
2693 struct value *tmp = arg1;
2695 arg2 = value_one (value_type (arg1));
2696 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2697 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2700 return value_assign (arg1, arg2);
2703 case UNOP_PREDECREMENT:
2704 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2705 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2707 else if (unop_user_defined_p (op, arg1))
2709 return value_x_unop (arg1, op, noside);
2713 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2714 arg2 = value_ptradd (arg1, -1);
2717 struct value *tmp = arg1;
2719 arg2 = value_one (value_type (arg1));
2720 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2721 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2724 return value_assign (arg1, arg2);
2727 case UNOP_POSTINCREMENT:
2728 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2729 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2731 else if (unop_user_defined_p (op, arg1))
2733 return value_x_unop (arg1, op, noside);
2737 arg3 = value_non_lval (arg1);
2739 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2740 arg2 = value_ptradd (arg1, 1);
2743 struct value *tmp = arg1;
2745 arg2 = value_one (value_type (arg1));
2746 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2747 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2750 value_assign (arg1, arg2);
2754 case UNOP_POSTDECREMENT:
2755 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2756 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2758 else if (unop_user_defined_p (op, arg1))
2760 return value_x_unop (arg1, op, noside);
2764 arg3 = value_non_lval (arg1);
2766 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2767 arg2 = value_ptradd (arg1, -1);
2770 struct value *tmp = arg1;
2772 arg2 = value_one (value_type (arg1));
2773 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2774 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2777 value_assign (arg1, arg2);
2783 return value_of_this (exp->language_defn);
2786 /* The value is not supposed to be used. This is here to make it
2787 easier to accommodate expressions that contain types. */
2789 if (noside == EVAL_SKIP)
2790 return eval_skip_value (exp);
2791 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2792 return allocate_value (exp->elts[pc + 1].type);
2794 error (_("Attempt to use a type name as an expression"));
2798 if (noside == EVAL_SKIP)
2800 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2801 return eval_skip_value (exp);
2803 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2805 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2806 struct value *result;
2808 result = evaluate_subexp (NULL_TYPE, exp, pos,
2809 EVAL_AVOID_SIDE_EFFECTS);
2811 /* 'decltype' has special semantics for lvalues. */
2812 if (op == OP_DECLTYPE
2813 && (sub_op == BINOP_SUBSCRIPT
2814 || sub_op == STRUCTOP_MEMBER
2815 || sub_op == STRUCTOP_MPTR
2816 || sub_op == UNOP_IND
2817 || sub_op == STRUCTOP_STRUCT
2818 || sub_op == STRUCTOP_PTR
2819 || sub_op == OP_SCOPE))
2821 struct type *type = value_type (result);
2823 if (!TYPE_IS_REFERENCE (type))
2825 type = lookup_lvalue_reference_type (type);
2826 result = allocate_value (type);
2833 error (_("Attempt to use a type as an expression"));
2837 struct value *result;
2838 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2840 if (sub_op == OP_TYPE || sub_op == OP_DECLTYPE || sub_op == OP_TYPEOF)
2841 result = evaluate_subexp (NULL_TYPE, exp, pos,
2842 EVAL_AVOID_SIDE_EFFECTS);
2844 result = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2846 if (noside != EVAL_NORMAL)
2847 return allocate_value (cplus_typeid_type (exp->gdbarch));
2849 return cplus_typeid (result);
2853 /* Removing this case and compiling with gcc -Wall reveals that
2854 a lot of cases are hitting this case. Some of these should
2855 probably be removed from expression.h; others are legitimate
2856 expressions which are (apparently) not fully implemented.
2858 If there are any cases landing here which mean a user error,
2859 then they should be separate cases, with more descriptive
2862 error (_("GDB does not (yet) know how to "
2863 "evaluate that kind of expression"));
2866 gdb_assert_not_reached ("missed return?");
2869 /* Evaluate a subexpression of EXP, at index *POS,
2870 and return the address of that subexpression.
2871 Advance *POS over the subexpression.
2872 If the subexpression isn't an lvalue, get an error.
2873 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2874 then only the type of the result need be correct. */
2876 static struct value *
2877 evaluate_subexp_for_address (struct expression *exp, int *pos,
2887 op = exp->elts[pc].opcode;
2893 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2895 /* We can't optimize out "&*" if there's a user-defined operator*. */
2896 if (unop_user_defined_p (op, x))
2898 x = value_x_unop (x, op, noside);
2899 goto default_case_after_eval;
2902 return coerce_array (x);
2906 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2907 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2909 case UNOP_MEMVAL_TYPE:
2914 x = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2915 type = value_type (x);
2916 return value_cast (lookup_pointer_type (type),
2917 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2921 var = exp->elts[pc + 2].symbol;
2923 /* C++: The "address" of a reference should yield the address
2924 * of the object pointed to. Let value_addr() deal with it. */
2925 if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var)))
2929 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2932 lookup_pointer_type (SYMBOL_TYPE (var));
2933 enum address_class sym_class = SYMBOL_CLASS (var);
2935 if (sym_class == LOC_CONST
2936 || sym_class == LOC_CONST_BYTES
2937 || sym_class == LOC_REGISTER)
2938 error (_("Attempt to take address of register or constant."));
2941 value_zero (type, not_lval);
2944 return address_of_variable (var, exp->elts[pc + 1].block);
2946 case OP_VAR_MSYM_VALUE:
2950 value *val = evaluate_var_msym_value (noside,
2951 exp->elts[pc + 1].objfile,
2952 exp->elts[pc + 2].msymbol);
2953 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2955 struct type *type = lookup_pointer_type (value_type (val));
2956 return value_zero (type, not_lval);
2959 return value_addr (val);
2963 tem = longest_to_int (exp->elts[pc + 2].longconst);
2964 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2965 x = value_aggregate_elt (exp->elts[pc + 1].type,
2966 &exp->elts[pc + 3].string,
2969 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2974 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2975 default_case_after_eval:
2976 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2978 struct type *type = check_typedef (value_type (x));
2980 if (TYPE_IS_REFERENCE (type))
2981 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2983 else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2984 return value_zero (lookup_pointer_type (value_type (x)),
2987 error (_("Attempt to take address of "
2988 "value not located in memory."));
2990 return value_addr (x);
2994 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2995 When used in contexts where arrays will be coerced anyway, this is
2996 equivalent to `evaluate_subexp' but much faster because it avoids
2997 actually fetching array contents (perhaps obsolete now that we have
3000 Note that we currently only do the coercion for C expressions, where
3001 arrays are zero based and the coercion is correct. For other languages,
3002 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
3003 to decide if coercion is appropriate. */
3006 evaluate_subexp_with_coercion (struct expression *exp,
3007 int *pos, enum noside noside)
3016 op = exp->elts[pc].opcode;
3021 var = exp->elts[pc + 2].symbol;
3022 type = check_typedef (SYMBOL_TYPE (var));
3023 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
3024 && !TYPE_VECTOR (type)
3025 && CAST_IS_CONVERSION (exp->language_defn))
3028 val = address_of_variable (var, exp->elts[pc + 1].block);
3029 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3035 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
3039 /* Evaluate a subexpression of EXP, at index *POS,
3040 and return a value for the size of that subexpression.
3041 Advance *POS over the subexpression. If NOSIDE is EVAL_NORMAL
3042 we allow side-effects on the operand if its type is a variable
3045 static struct value *
3046 evaluate_subexp_for_sizeof (struct expression *exp, int *pos,
3049 /* FIXME: This should be size_t. */
3050 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
3057 op = exp->elts[pc].opcode;
3061 /* This case is handled specially
3062 so that we avoid creating a value for the result type.
3063 If the result type is very big, it's desirable not to
3064 create a value unnecessarily. */
3067 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3068 type = check_typedef (value_type (val));
3069 if (TYPE_CODE (type) != TYPE_CODE_PTR
3070 && !TYPE_IS_REFERENCE (type)
3071 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
3072 error (_("Attempt to take contents of a non-pointer value."));
3073 type = TYPE_TARGET_TYPE (type);
3074 if (is_dynamic_type (type))
3075 type = value_type (value_ind (val));
3076 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3080 type = exp->elts[pc + 1].type;
3083 case UNOP_MEMVAL_TYPE:
3085 val = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3086 type = value_type (val);
3090 type = SYMBOL_TYPE (exp->elts[pc + 2].symbol);
3091 if (is_dynamic_type (type))
3093 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3094 type = value_type (val);
3100 case OP_VAR_MSYM_VALUE:
3104 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
3105 value *val = evaluate_var_msym_value (noside,
3106 exp->elts[pc + 1].objfile,
3109 type = value_type (val);
3110 if (TYPE_CODE (type) == TYPE_CODE_ERROR)
3111 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
3113 return value_from_longest (size_type, TYPE_LENGTH (type));
3117 /* Deal with the special case if NOSIDE is EVAL_NORMAL and the resulting
3118 type of the subscript is a variable length array type. In this case we
3119 must re-evaluate the right hand side of the subcription to allow
3121 case BINOP_SUBSCRIPT:
3122 if (noside == EVAL_NORMAL)
3124 int pc = (*pos) + 1;
3126 val = evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
3127 type = check_typedef (value_type (val));
3128 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3130 type = check_typedef (TYPE_TARGET_TYPE (type));
3131 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3133 type = TYPE_INDEX_TYPE (type);
3134 /* Only re-evaluate the right hand side if the resulting type
3135 is a variable length type. */
3136 if (TYPE_RANGE_DATA (type)->flag_bound_evaluated)
3138 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3139 return value_from_longest
3140 (size_type, (LONGEST) TYPE_LENGTH (value_type (val)));
3149 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3150 type = value_type (val);
3154 /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof:
3155 "When applied to a reference or a reference type, the result is
3156 the size of the referenced type." */
3157 type = check_typedef (type);
3158 if (exp->language_defn->la_language == language_cplus
3159 && (TYPE_IS_REFERENCE (type)))
3160 type = check_typedef (TYPE_TARGET_TYPE (type));
3161 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3164 /* Evaluate a subexpression of EXP, at index *POS, and return a value
3165 for that subexpression cast to TO_TYPE. Advance *POS over the
3169 evaluate_subexp_for_cast (expression *exp, int *pos,
3171 struct type *to_type)
3175 /* Don't let symbols be evaluated with evaluate_subexp because that
3176 throws an "unknown type" error for no-debug data symbols.
3177 Instead, we want the cast to reinterpret the symbol. */
3178 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE
3179 || exp->elts[pc].opcode == OP_VAR_VALUE)
3184 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE)
3186 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3187 return value_zero (to_type, not_lval);
3189 val = evaluate_var_msym_value (noside,
3190 exp->elts[pc + 1].objfile,
3191 exp->elts[pc + 2].msymbol);
3194 val = evaluate_var_value (noside,
3195 exp->elts[pc + 1].block,
3196 exp->elts[pc + 2].symbol);
3198 if (noside == EVAL_SKIP)
3199 return eval_skip_value (exp);
3201 val = value_cast (to_type, val);
3203 /* Don't allow e.g. '&(int)var_with_no_debug_info'. */
3204 if (VALUE_LVAL (val) == lval_memory)
3206 if (value_lazy (val))
3207 value_fetch_lazy (val);
3208 VALUE_LVAL (val) = not_lval;
3213 value *val = evaluate_subexp (to_type, exp, pos, noside);
3214 if (noside == EVAL_SKIP)
3215 return eval_skip_value (exp);
3216 return value_cast (to_type, val);
3219 /* Parse a type expression in the string [P..P+LENGTH). */
3222 parse_and_eval_type (char *p, int length)
3224 char *tmp = (char *) alloca (length + 4);
3227 memcpy (tmp + 1, p, length);
3228 tmp[length + 1] = ')';
3229 tmp[length + 2] = '0';
3230 tmp[length + 3] = '\0';
3231 expression_up expr = parse_expression (tmp);
3232 if (expr->elts[0].opcode != UNOP_CAST)
3233 error (_("Internal error in eval_type."));
3234 return expr->elts[1].type;
3238 calc_f77_array_dims (struct type *array_type)
3241 struct type *tmp_type;
3243 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
3244 error (_("Can't get dimensions for a non-array type"));
3246 tmp_type = array_type;
3248 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
3250 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)