1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008,
5 2009, 2010, 2011 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
27 #include "expression.h"
30 #include "language.h" /* For CAST_IS_CONVERSION. */
31 #include "f-lang.h" /* For array bound stuff. */
34 #include "objc-lang.h"
36 #include "parser-defs.h"
37 #include "cp-support.h"
39 #include "exceptions.h"
41 #include "user-regs.h"
43 #include "gdb_obstack.h"
45 #include "python/python.h"
48 #include "gdb_assert.h"
52 /* This is defined in valops.c */
53 extern int overload_resolution;
55 /* Prototypes for local functions. */
57 static struct value *evaluate_subexp_for_sizeof (struct expression *, int *);
59 static struct value *evaluate_subexp_for_address (struct expression *,
62 static char *get_label (struct expression *, int *);
64 static struct value *evaluate_struct_tuple (struct value *,
65 struct expression *, int *,
68 static LONGEST init_array_element (struct value *, struct value *,
69 struct expression *, int *, enum noside,
73 evaluate_subexp (struct type *expect_type, struct expression *exp,
74 int *pos, enum noside noside)
76 return (*exp->language_defn->la_exp_desc->evaluate_exp)
77 (expect_type, exp, pos, noside);
80 /* Parse the string EXP as a C expression, evaluate it,
81 and return the result as a number. */
84 parse_and_eval_address (char *exp)
86 struct expression *expr = parse_expression (exp);
88 struct cleanup *old_chain =
89 make_cleanup (free_current_contents, &expr);
91 addr = value_as_address (evaluate_expression (expr));
92 do_cleanups (old_chain);
96 /* Like parse_and_eval_address, but treats the value of the expression
97 as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
99 parse_and_eval_long (char *exp)
101 struct expression *expr = parse_expression (exp);
103 struct cleanup *old_chain =
104 make_cleanup (free_current_contents, &expr);
106 retval = value_as_long (evaluate_expression (expr));
107 do_cleanups (old_chain);
112 parse_and_eval (char *exp)
114 struct expression *expr = parse_expression (exp);
116 struct cleanup *old_chain =
117 make_cleanup (free_current_contents, &expr);
119 val = evaluate_expression (expr);
120 do_cleanups (old_chain);
124 /* Parse up to a comma (or to a closeparen)
125 in the string EXPP as an expression, evaluate it, and return the value.
126 EXPP is advanced to point to the comma. */
129 parse_to_comma_and_eval (char **expp)
131 struct expression *expr = parse_exp_1 (expp, (struct block *) 0, 1);
133 struct cleanup *old_chain =
134 make_cleanup (free_current_contents, &expr);
136 val = evaluate_expression (expr);
137 do_cleanups (old_chain);
141 /* Evaluate an expression in internal prefix form
142 such as is constructed by parse.y.
144 See expression.h for info on the format of an expression. */
147 evaluate_expression (struct expression *exp)
151 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
154 /* Evaluate an expression, avoiding all memory references
155 and getting a value whose type alone is correct. */
158 evaluate_type (struct expression *exp)
162 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
165 /* Evaluate a subexpression, avoiding all memory references and
166 getting a value whose type alone is correct. */
169 evaluate_subexpression_type (struct expression *exp, int subexp)
171 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
174 /* Find the current value of a watchpoint on EXP. Return the value in
175 *VALP and *RESULTP and the chain of intermediate and final values
176 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
179 If a memory error occurs while evaluating the expression, *RESULTP will
180 be set to NULL. *RESULTP may be a lazy value, if the result could
181 not be read from memory. It is used to determine whether a value
182 is user-specified (we should watch the whole value) or intermediate
183 (we should watch only the bit used to locate the final value).
185 If the final value, or any intermediate value, could not be read
186 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
187 set to any referenced values. *VALP will never be a lazy value.
188 This is the value which we store in struct breakpoint.
190 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
191 value chain. The caller must free the values individually. If
192 VAL_CHAIN is NULL, all generated values will be left on the value
196 fetch_subexp_value (struct expression *exp, int *pc, struct value **valp,
197 struct value **resultp, struct value **val_chain)
199 struct value *mark, *new_mark, *result;
200 volatile struct gdb_exception ex;
208 /* Evaluate the expression. */
209 mark = value_mark ();
212 TRY_CATCH (ex, RETURN_MASK_ALL)
214 result = evaluate_subexp (NULL_TYPE, exp, pc, EVAL_NORMAL);
218 /* Ignore memory errors, we want watchpoints pointing at
219 inaccessible memory to still be created; otherwise, throw the
220 error to some higher catcher. */
226 throw_exception (ex);
231 new_mark = value_mark ();
232 if (mark == new_mark)
237 /* Make sure it's not lazy, so that after the target stops again we
238 have a non-lazy previous value to compare with. */
240 && (!value_lazy (result) || gdb_value_fetch_lazy (result)))
245 /* Return the chain of intermediate values. We use this to
246 decide which addresses to watch. */
247 *val_chain = new_mark;
248 value_release_to_mark (mark);
252 /* Extract a field operation from an expression. If the subexpression
253 of EXP starting at *SUBEXP is not a structure dereference
254 operation, return NULL. Otherwise, return the name of the
255 dereferenced field, and advance *SUBEXP to point to the
256 subexpression of the left-hand-side of the dereference. This is
257 used when completing field names. */
260 extract_field_op (struct expression *exp, int *subexp)
265 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
266 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
268 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
269 result = &exp->elts[*subexp + 2].string;
270 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
274 /* If the next expression is an OP_LABELED, skips past it,
275 returning the label. Otherwise, does nothing and returns NULL. */
278 get_label (struct expression *exp, int *pos)
280 if (exp->elts[*pos].opcode == OP_LABELED)
283 char *name = &exp->elts[pc + 2].string;
284 int tem = longest_to_int (exp->elts[pc + 1].longconst);
286 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
293 /* This function evaluates tuples (in (the deleted) Chill) or
294 brace-initializers (in C/C++) for structure types. */
296 static struct value *
297 evaluate_struct_tuple (struct value *struct_val,
298 struct expression *exp,
299 int *pos, enum noside noside, int nargs)
301 struct type *struct_type = check_typedef (value_type (struct_val));
302 struct type *substruct_type = struct_type;
303 struct type *field_type;
311 struct value *val = NULL;
316 /* Skip past the labels, and count them. */
317 while (get_label (exp, pos) != NULL)
322 char *label = get_label (exp, &pc);
326 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
329 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
331 if (field_name != NULL && strcmp (field_name, label) == 0)
334 subfieldno = fieldno;
335 substruct_type = struct_type;
339 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
342 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
344 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
345 if ((field_name == 0 || *field_name == '\0')
346 && TYPE_CODE (field_type) == TYPE_CODE_UNION)
349 for (; variantno < TYPE_NFIELDS (field_type);
353 = TYPE_FIELD_TYPE (field_type, variantno);
354 if (TYPE_CODE (substruct_type) == TYPE_CODE_STRUCT)
357 subfieldno < TYPE_NFIELDS (substruct_type);
360 if (strcmp(TYPE_FIELD_NAME (substruct_type,
371 error (_("there is no field named %s"), label);
377 /* Unlabelled tuple element - go to next field. */
381 if (subfieldno >= TYPE_NFIELDS (substruct_type))
384 substruct_type = struct_type;
390 /* Skip static fields. */
391 while (fieldno < TYPE_NFIELDS (struct_type)
392 && field_is_static (&TYPE_FIELD (struct_type,
395 subfieldno = fieldno;
396 if (fieldno >= TYPE_NFIELDS (struct_type))
397 error (_("too many initializers"));
398 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
399 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
400 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
401 error (_("don't know which variant you want to set"));
405 /* Here, struct_type is the type of the inner struct,
406 while substruct_type is the type of the inner struct.
407 These are the same for normal structures, but a variant struct
408 contains anonymous union fields that contain substruct fields.
409 The value fieldno is the index of the top-level (normal or
410 anonymous union) field in struct_field, while the value
411 subfieldno is the index of the actual real (named inner) field
412 in substruct_type. */
414 field_type = TYPE_FIELD_TYPE (substruct_type, subfieldno);
416 val = evaluate_subexp (field_type, exp, pos, noside);
418 /* Now actually set the field in struct_val. */
420 /* Assign val to field fieldno. */
421 if (value_type (val) != field_type)
422 val = value_cast (field_type, val);
424 bitsize = TYPE_FIELD_BITSIZE (substruct_type, subfieldno);
425 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
427 bitpos += TYPE_FIELD_BITPOS (substruct_type, subfieldno);
428 addr = value_contents_writeable (struct_val) + bitpos / 8;
430 modify_field (struct_type, addr,
431 value_as_long (val), bitpos % 8, bitsize);
433 memcpy (addr, value_contents (val),
434 TYPE_LENGTH (value_type (val)));
436 while (--nlabels > 0);
441 /* Recursive helper function for setting elements of array tuples for
442 (the deleted) Chill. The target is ARRAY (which has bounds
443 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
444 and NOSIDE are as usual. Evaluates index expresions and sets the
445 specified element(s) of ARRAY to ELEMENT. Returns last index
449 init_array_element (struct value *array, struct value *element,
450 struct expression *exp, int *pos,
451 enum noside noside, LONGEST low_bound, LONGEST high_bound)
454 int element_size = TYPE_LENGTH (value_type (element));
456 if (exp->elts[*pos].opcode == BINOP_COMMA)
459 init_array_element (array, element, exp, pos, noside,
460 low_bound, high_bound);
461 return init_array_element (array, element,
462 exp, pos, noside, low_bound, high_bound);
464 else if (exp->elts[*pos].opcode == BINOP_RANGE)
469 low = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
470 high = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
471 if (low < low_bound || high > high_bound)
472 error (_("tuple range index out of range"));
473 for (index = low; index <= high; index++)
475 memcpy (value_contents_raw (array)
476 + (index - low_bound) * element_size,
477 value_contents (element), element_size);
482 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
483 if (index < low_bound || index > high_bound)
484 error (_("tuple index out of range"));
485 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
486 value_contents (element), element_size);
491 static struct value *
492 value_f90_subarray (struct value *array,
493 struct expression *exp, int *pos, enum noside noside)
496 LONGEST low_bound, high_bound;
497 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
498 enum f90_range_type range_type = longest_to_int (exp->elts[pc].longconst);
502 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
503 low_bound = TYPE_LOW_BOUND (range);
505 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
507 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
508 high_bound = TYPE_HIGH_BOUND (range);
510 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
512 return value_slice (array, low_bound, high_bound - low_bound + 1);
516 /* Promote value ARG1 as appropriate before performing a unary operation
518 If the result is not appropriate for any particular language then it
519 needs to patch this function. */
522 unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
527 *arg1 = coerce_ref (*arg1);
528 type1 = check_typedef (value_type (*arg1));
530 if (is_integral_type (type1))
532 switch (language->la_language)
535 /* Perform integral promotion for ANSI C/C++.
536 If not appropropriate for any particular language
537 it needs to modify this function. */
539 struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
541 if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
542 *arg1 = value_cast (builtin_int, *arg1);
549 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
550 operation on those two operands.
551 If the result is not appropriate for any particular language then it
552 needs to patch this function. */
555 binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
556 struct value **arg1, struct value **arg2)
558 struct type *promoted_type = NULL;
562 *arg1 = coerce_ref (*arg1);
563 *arg2 = coerce_ref (*arg2);
565 type1 = check_typedef (value_type (*arg1));
566 type2 = check_typedef (value_type (*arg2));
568 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
569 && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
570 && !is_integral_type (type1))
571 || (TYPE_CODE (type2) != TYPE_CODE_FLT
572 && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
573 && !is_integral_type (type2)))
576 if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
577 || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
579 /* No promotion required. */
581 else if (TYPE_CODE (type1) == TYPE_CODE_FLT
582 || TYPE_CODE (type2) == TYPE_CODE_FLT)
584 switch (language->la_language)
590 case language_opencl:
591 /* No promotion required. */
595 /* For other languages the result type is unchanged from gdb
596 version 6.7 for backward compatibility.
597 If either arg was long double, make sure that value is also long
598 double. Otherwise use double. */
599 if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch)
600 || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
601 promoted_type = builtin_type (gdbarch)->builtin_long_double;
603 promoted_type = builtin_type (gdbarch)->builtin_double;
607 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
608 && TYPE_CODE (type2) == TYPE_CODE_BOOL)
610 /* No promotion required. */
613 /* Integral operations here. */
614 /* FIXME: Also mixed integral/booleans, with result an integer. */
616 const struct builtin_type *builtin = builtin_type (gdbarch);
617 unsigned int promoted_len1 = TYPE_LENGTH (type1);
618 unsigned int promoted_len2 = TYPE_LENGTH (type2);
619 int is_unsigned1 = TYPE_UNSIGNED (type1);
620 int is_unsigned2 = TYPE_UNSIGNED (type2);
621 unsigned int result_len;
622 int unsigned_operation;
624 /* Determine type length and signedness after promotion for
626 if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int))
629 promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
631 if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
634 promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
637 if (promoted_len1 > promoted_len2)
639 unsigned_operation = is_unsigned1;
640 result_len = promoted_len1;
642 else if (promoted_len2 > promoted_len1)
644 unsigned_operation = is_unsigned2;
645 result_len = promoted_len2;
649 unsigned_operation = is_unsigned1 || is_unsigned2;
650 result_len = promoted_len1;
653 switch (language->la_language)
659 if (result_len <= TYPE_LENGTH (builtin->builtin_int))
661 promoted_type = (unsigned_operation
662 ? builtin->builtin_unsigned_int
663 : builtin->builtin_int);
665 else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
667 promoted_type = (unsigned_operation
668 ? builtin->builtin_unsigned_long
669 : builtin->builtin_long);
673 promoted_type = (unsigned_operation
674 ? builtin->builtin_unsigned_long_long
675 : builtin->builtin_long_long);
678 case language_opencl:
679 if (result_len <= TYPE_LENGTH (lookup_signed_typename
680 (language, gdbarch, "int")))
684 ? lookup_unsigned_typename (language, gdbarch, "int")
685 : lookup_signed_typename (language, gdbarch, "int"));
687 else if (result_len <= TYPE_LENGTH (lookup_signed_typename
688 (language, gdbarch, "long")))
692 ? lookup_unsigned_typename (language, gdbarch, "long")
693 : lookup_signed_typename (language, gdbarch,"long"));
697 /* For other languages the result type is unchanged from gdb
698 version 6.7 for backward compatibility.
699 If either arg was long long, make sure that value is also long
700 long. Otherwise use long. */
701 if (unsigned_operation)
703 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
704 promoted_type = builtin->builtin_unsigned_long_long;
706 promoted_type = builtin->builtin_unsigned_long;
710 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
711 promoted_type = builtin->builtin_long_long;
713 promoted_type = builtin->builtin_long;
721 /* Promote both operands to common type. */
722 *arg1 = value_cast (promoted_type, *arg1);
723 *arg2 = value_cast (promoted_type, *arg2);
728 ptrmath_type_p (const struct language_defn *lang, struct type *type)
730 type = check_typedef (type);
731 if (TYPE_CODE (type) == TYPE_CODE_REF)
732 type = TYPE_TARGET_TYPE (type);
734 switch (TYPE_CODE (type))
740 case TYPE_CODE_ARRAY:
741 return TYPE_VECTOR (type) ? 0 : lang->c_style_arrays;
748 /* Constructs a fake method with the given parameter types.
749 This function is used by the parser to construct an "expected"
750 type for method overload resolution. */
753 make_params (int num_types, struct type **param_types)
755 struct type *type = XZALLOC (struct type);
756 TYPE_MAIN_TYPE (type) = XZALLOC (struct main_type);
757 TYPE_LENGTH (type) = 1;
758 TYPE_CODE (type) = TYPE_CODE_METHOD;
759 TYPE_VPTR_FIELDNO (type) = -1;
760 TYPE_CHAIN (type) = type;
761 TYPE_NFIELDS (type) = num_types;
762 TYPE_FIELDS (type) = (struct field *)
763 TYPE_ZALLOC (type, sizeof (struct field) * num_types);
765 while (num_types-- > 0)
766 TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
772 evaluate_subexp_standard (struct type *expect_type,
773 struct expression *exp, int *pos,
778 int pc, pc2 = 0, oldpos;
779 struct value *arg1 = NULL;
780 struct value *arg2 = NULL;
784 struct value **argvec;
789 struct type **arg_types;
791 struct symbol *function = NULL;
792 char *function_name = NULL;
795 op = exp->elts[pc].opcode;
800 tem = longest_to_int (exp->elts[pc + 2].longconst);
801 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
802 if (noside == EVAL_SKIP)
804 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
805 &exp->elts[pc + 3].string,
806 expect_type, 0, noside);
808 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
813 return value_from_longest (exp->elts[pc + 1].type,
814 exp->elts[pc + 2].longconst);
818 return value_from_double (exp->elts[pc + 1].type,
819 exp->elts[pc + 2].doubleconst);
823 return value_from_decfloat (exp->elts[pc + 1].type,
824 exp->elts[pc + 2].decfloatconst);
829 if (noside == EVAL_SKIP)
832 /* JYG: We used to just return value_zero of the symbol type
833 if we're asked to avoid side effects. Otherwise we return
834 value_of_variable (...). However I'm not sure if
835 value_of_variable () has any side effect.
836 We need a full value object returned here for whatis_exp ()
837 to call evaluate_type () and then pass the full value to
838 value_rtti_target_type () if we are dealing with a pointer
839 or reference to a base class and print object is on. */
842 volatile struct gdb_exception except;
843 struct value *ret = NULL;
845 TRY_CATCH (except, RETURN_MASK_ERROR)
847 ret = value_of_variable (exp->elts[pc + 2].symbol,
848 exp->elts[pc + 1].block);
851 if (except.reason < 0)
853 if (noside == EVAL_AVOID_SIDE_EFFECTS)
854 ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol),
857 throw_exception (except);
863 case OP_VAR_ENTRY_VALUE:
865 if (noside == EVAL_SKIP)
869 struct symbol *sym = exp->elts[pc + 1].symbol;
870 struct frame_info *frame;
872 if (noside == EVAL_AVOID_SIDE_EFFECTS)
873 return value_zero (SYMBOL_TYPE (sym), not_lval);
875 if (SYMBOL_CLASS (sym) != LOC_COMPUTED
876 || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL)
877 error (_("Symbol \"%s\" does not have any specific entry value"),
878 SYMBOL_PRINT_NAME (sym));
880 frame = get_selected_frame (NULL);
881 return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
887 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
891 const char *name = &exp->elts[pc + 2].string;
895 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
896 regno = user_reg_map_name_to_regnum (exp->gdbarch,
897 name, strlen (name));
899 error (_("Register $%s not available."), name);
901 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
902 a value with the appropriate register type. Unfortunately,
903 we don't have easy access to the type of user registers.
904 So for these registers, we fetch the register value regardless
905 of the evaluation mode. */
906 if (noside == EVAL_AVOID_SIDE_EFFECTS
907 && regno < gdbarch_num_regs (exp->gdbarch)
908 + gdbarch_num_pseudo_regs (exp->gdbarch))
909 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
911 val = value_of_register (regno, get_selected_frame (NULL));
913 error (_("Value of register %s not available."), name);
919 type = language_bool_type (exp->language_defn, exp->gdbarch);
920 return value_from_longest (type, exp->elts[pc + 1].longconst);
924 return value_of_internalvar (exp->gdbarch,
925 exp->elts[pc + 1].internalvar);
928 tem = longest_to_int (exp->elts[pc + 1].longconst);
929 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
930 if (noside == EVAL_SKIP)
932 type = language_string_char_type (exp->language_defn, exp->gdbarch);
933 return value_string (&exp->elts[pc + 2].string, tem, type);
935 case OP_OBJC_NSSTRING: /* Objective C Foundation Class
936 NSString constant. */
937 tem = longest_to_int (exp->elts[pc + 1].longconst);
938 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
939 if (noside == EVAL_SKIP)
943 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
946 tem = longest_to_int (exp->elts[pc + 1].longconst);
948 += 3 + BYTES_TO_EXP_ELEM ((tem + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
949 if (noside == EVAL_SKIP)
951 return value_bitstring (&exp->elts[pc + 2].string, tem,
952 builtin_type (exp->gdbarch)->builtin_int);
957 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
958 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
959 nargs = tem3 - tem2 + 1;
960 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
962 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
963 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
965 struct value *rec = allocate_value (expect_type);
967 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
968 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
971 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
972 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
974 struct type *range_type = TYPE_INDEX_TYPE (type);
975 struct type *element_type = TYPE_TARGET_TYPE (type);
976 struct value *array = allocate_value (expect_type);
977 int element_size = TYPE_LENGTH (check_typedef (element_type));
978 LONGEST low_bound, high_bound, index;
980 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
983 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
986 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
987 for (tem = nargs; --nargs >= 0;)
989 struct value *element;
992 if (exp->elts[*pos].opcode == BINOP_RANGE)
995 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
997 element = evaluate_subexp (element_type, exp, pos, noside);
998 if (value_type (element) != element_type)
999 element = value_cast (element_type, element);
1002 int continue_pc = *pos;
1005 index = init_array_element (array, element, exp, pos, noside,
1006 low_bound, high_bound);
1011 if (index > high_bound)
1012 /* To avoid memory corruption. */
1013 error (_("Too many array elements"));
1014 memcpy (value_contents_raw (array)
1015 + (index - low_bound) * element_size,
1016 value_contents (element),
1024 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1025 && TYPE_CODE (type) == TYPE_CODE_SET)
1027 struct value *set = allocate_value (expect_type);
1028 gdb_byte *valaddr = value_contents_raw (set);
1029 struct type *element_type = TYPE_INDEX_TYPE (type);
1030 struct type *check_type = element_type;
1031 LONGEST low_bound, high_bound;
1033 /* Get targettype of elementtype. */
1034 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
1035 || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
1036 check_type = TYPE_TARGET_TYPE (check_type);
1038 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
1039 error (_("(power)set type with unknown size"));
1040 memset (valaddr, '\0', TYPE_LENGTH (type));
1041 for (tem = 0; tem < nargs; tem++)
1043 LONGEST range_low, range_high;
1044 struct type *range_low_type, *range_high_type;
1045 struct value *elem_val;
1047 if (exp->elts[*pos].opcode == BINOP_RANGE)
1050 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1051 range_low_type = value_type (elem_val);
1052 range_low = value_as_long (elem_val);
1053 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1054 range_high_type = value_type (elem_val);
1055 range_high = value_as_long (elem_val);
1059 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1060 range_low_type = range_high_type = value_type (elem_val);
1061 range_low = range_high = value_as_long (elem_val);
1063 /* Check types of elements to avoid mixture of elements from
1064 different types. Also check if type of element is "compatible"
1065 with element type of powerset. */
1066 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
1067 range_low_type = TYPE_TARGET_TYPE (range_low_type);
1068 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
1069 range_high_type = TYPE_TARGET_TYPE (range_high_type);
1070 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
1071 || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
1072 && (range_low_type != range_high_type)))
1073 /* different element modes. */
1074 error (_("POWERSET tuple elements of different mode"));
1075 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
1076 || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
1077 && range_low_type != check_type))
1078 error (_("incompatible POWERSET tuple elements"));
1079 if (range_low > range_high)
1081 warning (_("empty POWERSET tuple range"));
1084 if (range_low < low_bound || range_high > high_bound)
1085 error (_("POWERSET tuple element out of range"));
1086 range_low -= low_bound;
1087 range_high -= low_bound;
1088 for (; range_low <= range_high; range_low++)
1090 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
1092 if (gdbarch_bits_big_endian (exp->gdbarch))
1093 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
1094 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
1101 argvec = (struct value **) alloca (sizeof (struct value *) * nargs);
1102 for (tem = 0; tem < nargs; tem++)
1104 /* Ensure that array expressions are coerced into pointer
1106 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1108 if (noside == EVAL_SKIP)
1110 return value_array (tem2, tem3, argvec);
1114 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1116 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1118 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1120 if (noside == EVAL_SKIP)
1122 return value_slice (array, lowbound, upper - lowbound + 1);
1125 case TERNOP_SLICE_COUNT:
1127 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1129 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1131 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1133 return value_slice (array, lowbound, length);
1137 /* Skip third and second args to evaluate the first one. */
1138 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1139 if (value_logical_not (arg1))
1141 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1142 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1146 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1147 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1151 case OP_OBJC_SELECTOR:
1152 { /* Objective C @selector operator. */
1153 char *sel = &exp->elts[pc + 2].string;
1154 int len = longest_to_int (exp->elts[pc + 1].longconst);
1155 struct type *selector_type;
1157 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1158 if (noside == EVAL_SKIP)
1162 sel[len] = 0; /* Make sure it's terminated. */
1164 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1165 return value_from_longest (selector_type,
1166 lookup_child_selector (exp->gdbarch, sel));
1169 case OP_OBJC_MSGCALL:
1170 { /* Objective C message (method) call. */
1172 CORE_ADDR responds_selector = 0;
1173 CORE_ADDR method_selector = 0;
1175 CORE_ADDR selector = 0;
1177 int struct_return = 0;
1178 int sub_no_side = 0;
1180 struct value *msg_send = NULL;
1181 struct value *msg_send_stret = NULL;
1182 int gnu_runtime = 0;
1184 struct value *target = NULL;
1185 struct value *method = NULL;
1186 struct value *called_method = NULL;
1188 struct type *selector_type = NULL;
1189 struct type *long_type;
1191 struct value *ret = NULL;
1194 selector = exp->elts[pc + 1].longconst;
1195 nargs = exp->elts[pc + 2].longconst;
1196 argvec = (struct value **) alloca (sizeof (struct value *)
1201 long_type = builtin_type (exp->gdbarch)->builtin_long;
1202 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1204 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1205 sub_no_side = EVAL_NORMAL;
1207 sub_no_side = noside;
1209 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1211 if (value_as_long (target) == 0)
1212 return value_from_longest (long_type, 0);
1214 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1217 /* Find the method dispatch (Apple runtime) or method lookup
1218 (GNU runtime) function for Objective-C. These will be used
1219 to lookup the symbol information for the method. If we
1220 can't find any symbol information, then we'll use these to
1221 call the method, otherwise we can call the method
1222 directly. The msg_send_stret function is used in the special
1223 case of a method that returns a structure (Apple runtime
1227 struct type *type = selector_type;
1229 type = lookup_function_type (type);
1230 type = lookup_pointer_type (type);
1231 type = lookup_function_type (type);
1232 type = lookup_pointer_type (type);
1234 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1236 = find_function_in_inferior ("objc_msg_lookup", NULL);
1238 msg_send = value_from_pointer (type, value_as_address (msg_send));
1239 msg_send_stret = value_from_pointer (type,
1240 value_as_address (msg_send_stret));
1244 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1245 /* Special dispatcher for methods returning structs. */
1247 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1250 /* Verify the target object responds to this method. The
1251 standard top-level 'Object' class uses a different name for
1252 the verification method than the non-standard, but more
1253 often used, 'NSObject' class. Make sure we check for both. */
1256 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1257 if (responds_selector == 0)
1259 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1261 if (responds_selector == 0)
1262 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1265 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1266 if (method_selector == 0)
1268 = lookup_child_selector (exp->gdbarch, "methodFor:");
1270 if (method_selector == 0)
1271 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1273 /* Call the verification method, to make sure that the target
1274 class implements the desired method. */
1276 argvec[0] = msg_send;
1278 argvec[2] = value_from_longest (long_type, responds_selector);
1279 argvec[3] = value_from_longest (long_type, selector);
1282 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1285 /* Function objc_msg_lookup returns a pointer. */
1287 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1289 if (value_as_long (ret) == 0)
1290 error (_("Target does not respond to this message selector."));
1292 /* Call "methodForSelector:" method, to get the address of a
1293 function method that implements this selector for this
1294 class. If we can find a symbol at that address, then we
1295 know the return type, parameter types etc. (that's a good
1298 argvec[0] = msg_send;
1300 argvec[2] = value_from_longest (long_type, method_selector);
1301 argvec[3] = value_from_longest (long_type, selector);
1304 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1308 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
1311 /* ret should now be the selector. */
1313 addr = value_as_long (ret);
1316 struct symbol *sym = NULL;
1318 /* The address might point to a function descriptor;
1319 resolve it to the actual code address instead. */
1320 addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
1323 /* Is it a high_level symbol? */
1324 sym = find_pc_function (addr);
1326 method = value_of_variable (sym, 0);
1329 /* If we found a method with symbol information, check to see
1330 if it returns a struct. Otherwise assume it doesn't. */
1335 struct type *val_type;
1337 funaddr = find_function_addr (method, &val_type);
1339 block_for_pc (funaddr);
1341 CHECK_TYPEDEF (val_type);
1343 if ((val_type == NULL)
1344 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1346 if (expect_type != NULL)
1347 val_type = expect_type;
1350 struct_return = using_struct_return (exp->gdbarch,
1351 value_type (method),
1354 else if (expect_type != NULL)
1356 struct_return = using_struct_return (exp->gdbarch, NULL,
1357 check_typedef (expect_type));
1360 /* Found a function symbol. Now we will substitute its
1361 value in place of the message dispatcher (obj_msgSend),
1362 so that we call the method directly instead of thru
1363 the dispatcher. The main reason for doing this is that
1364 we can now evaluate the return value and parameter values
1365 according to their known data types, in case we need to
1366 do things like promotion, dereferencing, special handling
1367 of structs and doubles, etc.
1369 We want to use the type signature of 'method', but still
1370 jump to objc_msgSend() or objc_msgSend_stret() to better
1371 mimic the behavior of the runtime. */
1375 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1376 error (_("method address has symbol information "
1377 "with non-function type; skipping"));
1379 /* Create a function pointer of the appropriate type, and
1380 replace its value with the value of msg_send or
1381 msg_send_stret. We must use a pointer here, as
1382 msg_send and msg_send_stret are of pointer type, and
1383 the representation may be different on systems that use
1384 function descriptors. */
1387 = value_from_pointer (lookup_pointer_type (value_type (method)),
1388 value_as_address (msg_send_stret));
1391 = value_from_pointer (lookup_pointer_type (value_type (method)),
1392 value_as_address (msg_send));
1397 called_method = msg_send_stret;
1399 called_method = msg_send;
1402 if (noside == EVAL_SKIP)
1405 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1407 /* If the return type doesn't look like a function type,
1408 call an error. This can happen if somebody tries to
1409 turn a variable into a function call. This is here
1410 because people often want to call, eg, strcmp, which
1411 gdb doesn't know is a function. If gdb isn't asked for
1412 it's opinion (ie. through "whatis"), it won't offer
1415 struct type *type = value_type (called_method);
1417 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1418 type = TYPE_TARGET_TYPE (type);
1419 type = TYPE_TARGET_TYPE (type);
1423 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1424 return allocate_value (expect_type);
1426 return allocate_value (type);
1429 error (_("Expression of type other than "
1430 "\"method returning ...\" used as a method"));
1433 /* Now depending on whether we found a symbol for the method,
1434 we will either call the runtime dispatcher or the method
1437 argvec[0] = called_method;
1439 argvec[2] = value_from_longest (long_type, selector);
1440 /* User-supplied arguments. */
1441 for (tem = 0; tem < nargs; tem++)
1442 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1443 argvec[tem + 3] = 0;
1445 if (gnu_runtime && (method != NULL))
1447 /* Function objc_msg_lookup returns a pointer. */
1448 deprecated_set_value_type (argvec[0],
1449 lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
1451 = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1454 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1461 op = exp->elts[*pos].opcode;
1462 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1463 /* Allocate arg vector, including space for the function to be
1464 called in argvec[0] and a terminating NULL. */
1465 argvec = (struct value **)
1466 alloca (sizeof (struct value *) * (nargs + 3));
1467 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1470 /* First, evaluate the structure into arg2. */
1473 if (noside == EVAL_SKIP)
1476 if (op == STRUCTOP_MEMBER)
1478 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1482 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1485 /* If the function is a virtual function, then the
1486 aggregate value (providing the structure) plays
1487 its part by providing the vtable. Otherwise,
1488 it is just along for the ride: call the function
1491 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1493 if (TYPE_CODE (check_typedef (value_type (arg1)))
1494 != TYPE_CODE_METHODPTR)
1495 error (_("Non-pointer-to-member value used in pointer-to-member "
1498 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1500 struct type *method_type = check_typedef (value_type (arg1));
1502 arg1 = value_zero (method_type, not_lval);
1505 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1507 /* Now, say which argument to start evaluating from. */
1510 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1512 /* Hair for method invocations. */
1516 /* First, evaluate the structure into arg2. */
1518 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1519 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1520 if (noside == EVAL_SKIP)
1523 if (op == STRUCTOP_STRUCT)
1525 /* If v is a variable in a register, and the user types
1526 v.method (), this will produce an error, because v has
1529 A possible way around this would be to allocate a
1530 copy of the variable on the stack, copy in the
1531 contents, call the function, and copy out the
1532 contents. I.e. convert this from call by reference
1533 to call by copy-return (or whatever it's called).
1534 However, this does not work because it is not the
1535 same: the method being called could stash a copy of
1536 the address, and then future uses through that address
1537 (after the method returns) would be expected to
1538 use the variable itself, not some copy of it. */
1539 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1543 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1545 /* Check to see if the operator '->' has been
1546 overloaded. If the operator has been overloaded
1547 replace arg2 with the value returned by the custom
1548 operator and continue evaluation. */
1549 while (unop_user_defined_p (op, arg2))
1551 volatile struct gdb_exception except;
1552 struct value *value = NULL;
1553 TRY_CATCH (except, RETURN_MASK_ERROR)
1555 value = value_x_unop (arg2, op, noside);
1558 if (except.reason < 0)
1560 if (except.error == NOT_FOUND_ERROR)
1563 throw_exception (except);
1568 /* Now, say which argument to start evaluating from. */
1571 else if (op == OP_SCOPE
1572 && overload_resolution
1573 && (exp->language_defn->la_language == language_cplus))
1575 /* Unpack it locally so we can properly handle overload
1581 local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
1582 (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
1583 type = exp->elts[pc2 + 1].type;
1584 name = &exp->elts[pc2 + 3].string;
1587 function_name = NULL;
1588 if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
1590 function = cp_lookup_symbol_namespace (TYPE_TAG_NAME (type),
1592 get_selected_block (0),
1594 if (function == NULL)
1595 error (_("No symbol \"%s\" in namespace \"%s\"."),
1596 name, TYPE_TAG_NAME (type));
1602 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1603 || TYPE_CODE (type) == TYPE_CODE_UNION);
1604 function_name = name;
1606 arg2 = value_zero (type, lval_memory);
1611 else if (op == OP_ADL_FUNC)
1613 /* Save the function position and move pos so that the arguments
1614 can be evaluated. */
1620 func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst);
1621 (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1);
1625 /* Non-method function call. */
1629 /* If this is a C++ function wait until overload resolution. */
1630 if (op == OP_VAR_VALUE
1631 && overload_resolution
1632 && (exp->language_defn->la_language == language_cplus))
1634 (*pos) += 4; /* Skip the evaluation of the symbol. */
1639 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1640 type = value_type (argvec[0]);
1641 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1642 type = TYPE_TARGET_TYPE (type);
1643 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1645 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1647 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type,
1655 /* Evaluate arguments. */
1656 for (; tem <= nargs; tem++)
1658 /* Ensure that array expressions are coerced into pointer
1660 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1663 /* Signal end of arglist. */
1665 if (op == OP_ADL_FUNC)
1667 struct symbol *symp;
1670 int string_pc = save_pos1 + 3;
1672 /* Extract the function name. */
1673 name_len = longest_to_int (exp->elts[string_pc].longconst);
1674 func_name = (char *) alloca (name_len + 1);
1675 strcpy (func_name, &exp->elts[string_pc + 1].string);
1677 find_overload_match (&argvec[1], nargs, func_name,
1678 NON_METHOD, /* not method */
1679 0, /* strict match */
1680 NULL, NULL, /* pass NULL symbol since
1681 symbol is unknown */
1682 NULL, &symp, NULL, 0);
1684 /* Now fix the expression being evaluated. */
1685 exp->elts[save_pos1 + 2].symbol = symp;
1686 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1689 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
1690 || (op == OP_SCOPE && function_name != NULL))
1692 int static_memfuncp;
1695 /* Method invocation : stuff "this" as first parameter. */
1700 /* Name of method from expression. */
1701 tstr = &exp->elts[pc2 + 2].string;
1704 tstr = function_name;
1706 if (overload_resolution && (exp->language_defn->la_language
1709 /* Language is C++, do some overload resolution before
1711 struct value *valp = NULL;
1713 (void) find_overload_match (&argvec[1], nargs, tstr,
1714 METHOD, /* method */
1715 0, /* strict match */
1716 &arg2, /* the object */
1718 &static_memfuncp, 0);
1720 if (op == OP_SCOPE && !static_memfuncp)
1722 /* For the time being, we don't handle this. */
1723 error (_("Call to overloaded function %s requires "
1727 argvec[1] = arg2; /* the ``this'' pointer */
1728 argvec[0] = valp; /* Use the method found after overload
1732 /* Non-C++ case -- or no overload resolution. */
1734 struct value *temp = arg2;
1736 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1738 op == STRUCTOP_STRUCT
1739 ? "structure" : "structure pointer");
1740 /* value_struct_elt updates temp with the correct value
1741 of the ``this'' pointer if necessary, so modify argvec[1] to
1742 reflect any ``this'' changes. */
1744 = value_from_longest (lookup_pointer_type(value_type (temp)),
1745 value_address (temp)
1746 + value_embedded_offset (temp));
1747 argvec[1] = arg2; /* the ``this'' pointer */
1750 if (static_memfuncp)
1752 argvec[1] = argvec[0];
1757 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1762 else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
1764 /* Non-member function being called. */
1765 /* fn: This can only be done for C++ functions. A C-style function
1766 in a C++ program, for instance, does not have the fields that
1767 are expected here. */
1769 if (overload_resolution && (exp->language_defn->la_language
1772 /* Language is C++, do some overload resolution before
1774 struct symbol *symp;
1777 /* If a scope has been specified disable ADL. */
1781 if (op == OP_VAR_VALUE)
1782 function = exp->elts[save_pos1+2].symbol;
1784 (void) find_overload_match (&argvec[1], nargs,
1785 NULL, /* no need for name */
1786 NON_METHOD, /* not method */
1787 0, /* strict match */
1788 NULL, function, /* the function */
1789 NULL, &symp, NULL, no_adl);
1791 if (op == OP_VAR_VALUE)
1793 /* Now fix the expression being evaluated. */
1794 exp->elts[save_pos1+2].symbol = symp;
1795 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
1799 argvec[0] = value_of_variable (symp, get_selected_block (0));
1803 /* Not C++, or no overload resolution allowed. */
1804 /* Nothing to be done; argvec already correctly set up. */
1809 /* It is probably a C-style function. */
1810 /* Nothing to be done; argvec already correctly set up. */
1815 if (noside == EVAL_SKIP)
1817 if (argvec[0] == NULL)
1818 error (_("Cannot evaluate function -- may be inlined"));
1819 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1821 /* If the return type doesn't look like a function type, call an
1822 error. This can happen if somebody tries to turn a variable into
1823 a function call. This is here because people often want to
1824 call, eg, strcmp, which gdb doesn't know is a function. If
1825 gdb isn't asked for it's opinion (ie. through "whatis"),
1826 it won't offer it. */
1828 struct type *ftype = value_type (argvec[0]);
1830 if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
1832 /* We don't know anything about what the internal
1833 function might return, but we have to return
1835 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
1838 else if (TYPE_GNU_IFUNC (ftype))
1839 return allocate_value (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (ftype)));
1840 else if (TYPE_TARGET_TYPE (ftype))
1841 return allocate_value (TYPE_TARGET_TYPE (ftype));
1843 error (_("Expression of type other than "
1844 "\"Function returning ...\" used as function"));
1846 if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_INTERNAL_FUNCTION)
1847 return call_internal_function (exp->gdbarch, exp->language_defn,
1848 argvec[0], nargs, argvec + 1);
1850 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1851 /* pai: FIXME save value from call_function_by_hand, then adjust
1852 pc by adjust_fn_pc if +ve. */
1854 case OP_F77_UNDETERMINED_ARGLIST:
1856 /* Remember that in F77, functions, substring ops and
1857 array subscript operations cannot be disambiguated
1858 at parse time. We have made all array subscript operations,
1859 substring operations as well as function calls come here
1860 and we now have to discover what the heck this thing actually was.
1861 If it is a function, we process just as if we got an OP_FUNCALL. */
1863 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1866 /* First determine the type code we are dealing with. */
1867 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1868 type = check_typedef (value_type (arg1));
1869 code = TYPE_CODE (type);
1871 if (code == TYPE_CODE_PTR)
1873 /* Fortran always passes variable to subroutines as pointer.
1874 So we need to look into its target type to see if it is
1875 array, string or function. If it is, we need to switch
1876 to the target value the original one points to. */
1877 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1879 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1880 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1881 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1883 arg1 = value_ind (arg1);
1884 type = check_typedef (value_type (arg1));
1885 code = TYPE_CODE (type);
1891 case TYPE_CODE_ARRAY:
1892 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1893 return value_f90_subarray (arg1, exp, pos, noside);
1895 goto multi_f77_subscript;
1897 case TYPE_CODE_STRING:
1898 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1899 return value_f90_subarray (arg1, exp, pos, noside);
1902 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1903 return value_subscript (arg1, value_as_long (arg2));
1907 case TYPE_CODE_FUNC:
1908 /* It's a function call. */
1909 /* Allocate arg vector, including space for the function to be
1910 called in argvec[0] and a terminating NULL. */
1911 argvec = (struct value **)
1912 alloca (sizeof (struct value *) * (nargs + 2));
1915 for (; tem <= nargs; tem++)
1916 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1917 argvec[tem] = 0; /* signal end of arglist */
1921 error (_("Cannot perform substring on this type"));
1925 /* We have a complex number, There should be 2 floating
1926 point numbers that compose it. */
1928 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1929 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1931 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1933 case STRUCTOP_STRUCT:
1934 tem = longest_to_int (exp->elts[pc + 1].longconst);
1935 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1936 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1937 if (noside == EVAL_SKIP)
1939 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1940 return value_zero (lookup_struct_elt_type (value_type (arg1),
1941 &exp->elts[pc + 2].string,
1946 struct value *temp = arg1;
1948 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1953 tem = longest_to_int (exp->elts[pc + 1].longconst);
1954 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1955 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1956 if (noside == EVAL_SKIP)
1959 /* Check to see if operator '->' has been overloaded. If so replace
1960 arg1 with the value returned by evaluating operator->(). */
1961 while (unop_user_defined_p (op, arg1))
1963 volatile struct gdb_exception except;
1964 struct value *value = NULL;
1965 TRY_CATCH (except, RETURN_MASK_ERROR)
1967 value = value_x_unop (arg1, op, noside);
1970 if (except.reason < 0)
1972 if (except.error == NOT_FOUND_ERROR)
1975 throw_exception (except);
1980 /* JYG: if print object is on we need to replace the base type
1981 with rtti type in order to continue on with successful
1982 lookup of member / method only available in the rtti type. */
1984 struct type *type = value_type (arg1);
1985 struct type *real_type;
1986 int full, top, using_enc;
1987 struct value_print_options opts;
1989 get_user_print_options (&opts);
1990 if (opts.objectprint && TYPE_TARGET_TYPE(type)
1991 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1993 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1996 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1997 real_type = lookup_pointer_type (real_type);
1999 real_type = lookup_reference_type (real_type);
2001 arg1 = value_cast (real_type, arg1);
2006 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2007 return value_zero (lookup_struct_elt_type (value_type (arg1),
2008 &exp->elts[pc + 2].string,
2013 struct value *temp = arg1;
2015 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
2016 NULL, "structure pointer");
2019 case STRUCTOP_MEMBER:
2021 if (op == STRUCTOP_MEMBER)
2022 arg1 = evaluate_subexp_for_address (exp, pos, noside);
2024 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2026 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2028 if (noside == EVAL_SKIP)
2031 type = check_typedef (value_type (arg2));
2032 switch (TYPE_CODE (type))
2034 case TYPE_CODE_METHODPTR:
2035 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2036 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
2039 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
2040 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
2041 return value_ind (arg2);
2044 case TYPE_CODE_MEMBERPTR:
2045 /* Now, convert these values to an address. */
2046 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
2049 mem_offset = value_as_long (arg2);
2051 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2052 value_as_long (arg1) + mem_offset);
2053 return value_ind (arg3);
2056 error (_("non-pointer-to-member value used "
2057 "in pointer-to-member construct"));
2061 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2062 arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
2063 for (ix = 0; ix < nargs; ++ix)
2064 arg_types[ix] = exp->elts[pc + 1 + ix + 1].type;
2066 expect_type = make_params (nargs, arg_types);
2067 *(pos) += 3 + nargs;
2068 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
2069 xfree (TYPE_FIELDS (expect_type));
2070 xfree (TYPE_MAIN_TYPE (expect_type));
2071 xfree (expect_type);
2075 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2076 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2077 if (noside == EVAL_SKIP)
2079 if (binop_user_defined_p (op, arg1, arg2))
2080 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2082 return value_concat (arg1, arg2);
2085 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2086 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2088 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2090 if (binop_user_defined_p (op, arg1, arg2))
2091 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2093 return value_assign (arg1, arg2);
2095 case BINOP_ASSIGN_MODIFY:
2097 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2098 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2099 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2101 op = exp->elts[pc + 1].opcode;
2102 if (binop_user_defined_p (op, arg1, arg2))
2103 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
2104 else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn,
2106 && is_integral_type (value_type (arg2)))
2107 arg2 = value_ptradd (arg1, value_as_long (arg2));
2108 else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn,
2110 && is_integral_type (value_type (arg2)))
2111 arg2 = value_ptradd (arg1, - value_as_long (arg2));
2114 struct value *tmp = arg1;
2116 /* For shift and integer exponentiation operations,
2117 only promote the first argument. */
2118 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2119 && is_integral_type (value_type (arg2)))
2120 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
2122 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2124 arg2 = value_binop (tmp, arg2, op);
2126 return value_assign (arg1, arg2);
2129 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2130 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2131 if (noside == EVAL_SKIP)
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 && is_integral_type (value_type (arg2)))
2137 return value_ptradd (arg1, value_as_long (arg2));
2138 else if (ptrmath_type_p (exp->language_defn, value_type (arg2))
2139 && is_integral_type (value_type (arg1)))
2140 return value_ptradd (arg2, value_as_long (arg1));
2143 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2144 return value_binop (arg1, arg2, BINOP_ADD);
2148 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2149 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2150 if (noside == EVAL_SKIP)
2152 if (binop_user_defined_p (op, arg1, arg2))
2153 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2154 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2155 && ptrmath_type_p (exp->language_defn, value_type (arg2)))
2157 /* FIXME -- should be ptrdiff_t */
2158 type = builtin_type (exp->gdbarch)->builtin_long;
2159 return value_from_longest (type, value_ptrdiff (arg1, arg2));
2161 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2162 && is_integral_type (value_type (arg2)))
2163 return value_ptradd (arg1, - value_as_long (arg2));
2166 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2167 return value_binop (arg1, arg2, BINOP_SUB);
2178 case BINOP_BITWISE_AND:
2179 case BINOP_BITWISE_IOR:
2180 case BINOP_BITWISE_XOR:
2181 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2182 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2183 if (noside == EVAL_SKIP)
2185 if (binop_user_defined_p (op, arg1, arg2))
2186 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2189 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2190 fudge arg2 to avoid division-by-zero, the caller is
2191 (theoretically) only looking for the type of the result. */
2192 if (noside == EVAL_AVOID_SIDE_EFFECTS
2193 /* ??? Do we really want to test for BINOP_MOD here?
2194 The implementation of value_binop gives it a well-defined
2197 || op == BINOP_INTDIV
2200 && value_logical_not (arg2))
2202 struct value *v_one, *retval;
2204 v_one = value_one (value_type (arg2));
2205 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
2206 retval = value_binop (arg1, v_one, op);
2211 /* For shift and integer exponentiation operations,
2212 only promote the first argument. */
2213 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2214 && is_integral_type (value_type (arg2)))
2215 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2217 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2219 return value_binop (arg1, arg2, op);
2224 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2225 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2226 if (noside == EVAL_SKIP)
2228 error (_("':' operator used in invalid context"));
2230 case BINOP_SUBSCRIPT:
2231 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2232 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2233 if (noside == EVAL_SKIP)
2235 if (binop_user_defined_p (op, arg1, arg2))
2236 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2239 /* If the user attempts to subscript something that is not an
2240 array or pointer type (like a plain int variable for example),
2241 then report this as an error. */
2243 arg1 = coerce_ref (arg1);
2244 type = check_typedef (value_type (arg1));
2245 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
2246 && TYPE_CODE (type) != TYPE_CODE_PTR)
2248 if (TYPE_NAME (type))
2249 error (_("cannot subscript something of type `%s'"),
2252 error (_("cannot subscript requested type"));
2255 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2256 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
2258 return value_subscript (arg1, value_as_long (arg2));
2262 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2263 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2264 if (noside == EVAL_SKIP)
2266 type = language_bool_type (exp->language_defn, exp->gdbarch);
2267 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
2269 case MULTI_SUBSCRIPT:
2271 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2272 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2275 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2276 /* FIXME: EVAL_SKIP handling may not be correct. */
2277 if (noside == EVAL_SKIP)
2288 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2289 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2291 /* If the user attempts to subscript something that has no target
2292 type (like a plain int variable for example), then report this
2295 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
2298 arg1 = value_zero (type, VALUE_LVAL (arg1));
2304 error (_("cannot subscript something of type `%s'"),
2305 TYPE_NAME (value_type (arg1)));
2309 if (binop_user_defined_p (op, arg1, arg2))
2311 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
2315 arg1 = coerce_ref (arg1);
2316 type = check_typedef (value_type (arg1));
2318 switch (TYPE_CODE (type))
2321 case TYPE_CODE_ARRAY:
2322 case TYPE_CODE_STRING:
2323 arg1 = value_subscript (arg1, value_as_long (arg2));
2326 case TYPE_CODE_BITSTRING:
2327 type = language_bool_type (exp->language_defn, exp->gdbarch);
2328 arg1 = value_bitstring_subscript (type, arg1,
2329 value_as_long (arg2));
2333 if (TYPE_NAME (type))
2334 error (_("cannot subscript something of type `%s'"),
2337 error (_("cannot subscript requested type"));
2343 multi_f77_subscript:
2345 LONGEST subscript_array[MAX_FORTRAN_DIMS];
2346 int ndimensions = 1, i;
2347 struct value *array = arg1;
2349 if (nargs > MAX_FORTRAN_DIMS)
2350 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
2352 ndimensions = calc_f77_array_dims (type);
2354 if (nargs != ndimensions)
2355 error (_("Wrong number of subscripts"));
2357 gdb_assert (nargs > 0);
2359 /* Now that we know we have a legal array subscript expression
2360 let us actually find out where this element exists in the array. */
2362 /* Take array indices left to right. */
2363 for (i = 0; i < nargs; i++)
2365 /* Evaluate each subscript; it must be a legal integer in F77. */
2366 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2368 /* Fill in the subscript array. */
2370 subscript_array[i] = value_as_long (arg2);
2373 /* Internal type of array is arranged right to left. */
2374 for (i = nargs; i > 0; i--)
2376 struct type *array_type = check_typedef (value_type (array));
2377 LONGEST index = subscript_array[i - 1];
2379 lower = f77_get_lowerbound (array_type);
2380 array = value_subscripted_rvalue (array, index, lower);
2386 case BINOP_LOGICAL_AND:
2387 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2388 if (noside == EVAL_SKIP)
2390 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2395 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2398 if (binop_user_defined_p (op, arg1, arg2))
2400 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2401 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2405 tem = value_logical_not (arg1);
2406 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2407 (tem ? EVAL_SKIP : noside));
2408 type = language_bool_type (exp->language_defn, exp->gdbarch);
2409 return value_from_longest (type,
2410 (LONGEST) (!tem && !value_logical_not (arg2)));
2413 case BINOP_LOGICAL_OR:
2414 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2415 if (noside == EVAL_SKIP)
2417 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2422 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2425 if (binop_user_defined_p (op, arg1, arg2))
2427 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2428 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2432 tem = value_logical_not (arg1);
2433 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2434 (!tem ? EVAL_SKIP : noside));
2435 type = language_bool_type (exp->language_defn, exp->gdbarch);
2436 return value_from_longest (type,
2437 (LONGEST) (!tem || !value_logical_not (arg2)));
2441 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2442 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2443 if (noside == EVAL_SKIP)
2445 if (binop_user_defined_p (op, arg1, arg2))
2447 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2451 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2452 tem = value_equal (arg1, arg2);
2453 type = language_bool_type (exp->language_defn, exp->gdbarch);
2454 return value_from_longest (type, (LONGEST) tem);
2457 case BINOP_NOTEQUAL:
2458 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2459 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2460 if (noside == EVAL_SKIP)
2462 if (binop_user_defined_p (op, arg1, arg2))
2464 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2468 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2469 tem = value_equal (arg1, arg2);
2470 type = language_bool_type (exp->language_defn, exp->gdbarch);
2471 return value_from_longest (type, (LONGEST) ! tem);
2475 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2476 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2477 if (noside == EVAL_SKIP)
2479 if (binop_user_defined_p (op, arg1, arg2))
2481 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2485 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2486 tem = value_less (arg1, arg2);
2487 type = language_bool_type (exp->language_defn, exp->gdbarch);
2488 return value_from_longest (type, (LONGEST) tem);
2492 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2493 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2494 if (noside == EVAL_SKIP)
2496 if (binop_user_defined_p (op, arg1, arg2))
2498 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2502 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2503 tem = value_less (arg2, arg1);
2504 type = language_bool_type (exp->language_defn, exp->gdbarch);
2505 return value_from_longest (type, (LONGEST) tem);
2509 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2510 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2511 if (noside == EVAL_SKIP)
2513 if (binop_user_defined_p (op, arg1, arg2))
2515 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2519 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2520 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2521 type = language_bool_type (exp->language_defn, exp->gdbarch);
2522 return value_from_longest (type, (LONGEST) tem);
2526 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2527 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2528 if (noside == EVAL_SKIP)
2530 if (binop_user_defined_p (op, arg1, arg2))
2532 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2536 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2537 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2538 type = language_bool_type (exp->language_defn, exp->gdbarch);
2539 return value_from_longest (type, (LONGEST) tem);
2543 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2544 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2545 if (noside == EVAL_SKIP)
2547 type = check_typedef (value_type (arg2));
2548 if (TYPE_CODE (type) != TYPE_CODE_INT)
2549 error (_("Non-integral right operand for \"@\" operator."));
2550 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2552 return allocate_repeat_value (value_type (arg1),
2553 longest_to_int (value_as_long (arg2)));
2556 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2559 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2560 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2563 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2564 if (noside == EVAL_SKIP)
2566 if (unop_user_defined_p (op, arg1))
2567 return value_x_unop (arg1, op, noside);
2570 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2571 return value_pos (arg1);
2575 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2576 if (noside == EVAL_SKIP)
2578 if (unop_user_defined_p (op, arg1))
2579 return value_x_unop (arg1, op, noside);
2582 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2583 return value_neg (arg1);
2586 case UNOP_COMPLEMENT:
2587 /* C++: check for and handle destructor names. */
2588 op = exp->elts[*pos].opcode;
2590 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2591 if (noside == EVAL_SKIP)
2593 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2594 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2597 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2598 return value_complement (arg1);
2601 case UNOP_LOGICAL_NOT:
2602 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2603 if (noside == EVAL_SKIP)
2605 if (unop_user_defined_p (op, arg1))
2606 return value_x_unop (arg1, op, noside);
2609 type = language_bool_type (exp->language_defn, exp->gdbarch);
2610 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2614 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2615 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2616 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2617 type = check_typedef (value_type (arg1));
2618 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2619 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2620 error (_("Attempt to dereference pointer "
2621 "to member without an object"));
2622 if (noside == EVAL_SKIP)
2624 if (unop_user_defined_p (op, arg1))
2625 return value_x_unop (arg1, op, noside);
2626 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2628 type = check_typedef (value_type (arg1));
2629 if (TYPE_CODE (type) == TYPE_CODE_PTR
2630 || TYPE_CODE (type) == TYPE_CODE_REF
2631 /* In C you can dereference an array to get the 1st elt. */
2632 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2634 return value_zero (TYPE_TARGET_TYPE (type),
2636 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2637 /* GDB allows dereferencing an int. */
2638 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2641 error (_("Attempt to take contents of a non-pointer value."));
2644 /* Allow * on an integer so we can cast it to whatever we want.
2645 This returns an int, which seems like the most C-like thing to
2646 do. "long long" variables are rare enough that
2647 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2648 if (TYPE_CODE (type) == TYPE_CODE_INT)
2649 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2650 (CORE_ADDR) value_as_address (arg1));
2651 return value_ind (arg1);
2654 /* C++: check for and handle pointer to members. */
2656 op = exp->elts[*pos].opcode;
2658 if (noside == EVAL_SKIP)
2660 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2665 struct value *retvalp = evaluate_subexp_for_address (exp, pos,
2672 if (noside == EVAL_SKIP)
2674 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2677 return evaluate_subexp_for_sizeof (exp, pos);
2681 type = exp->elts[pc + 1].type;
2682 arg1 = evaluate_subexp (type, exp, pos, noside);
2683 if (noside == EVAL_SKIP)
2685 if (type != value_type (arg1))
2686 arg1 = value_cast (type, arg1);
2689 case UNOP_DYNAMIC_CAST:
2691 type = exp->elts[pc + 1].type;
2692 arg1 = evaluate_subexp (type, exp, pos, noside);
2693 if (noside == EVAL_SKIP)
2695 return value_dynamic_cast (type, arg1);
2697 case UNOP_REINTERPRET_CAST:
2699 type = exp->elts[pc + 1].type;
2700 arg1 = evaluate_subexp (type, exp, pos, noside);
2701 if (noside == EVAL_SKIP)
2703 return value_reinterpret_cast (type, arg1);
2707 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2708 if (noside == EVAL_SKIP)
2710 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2711 return value_zero (exp->elts[pc + 1].type, lval_memory);
2713 return value_at_lazy (exp->elts[pc + 1].type,
2714 value_as_address (arg1));
2716 case UNOP_MEMVAL_TLS:
2718 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2719 if (noside == EVAL_SKIP)
2721 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2722 return value_zero (exp->elts[pc + 2].type, lval_memory);
2727 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2728 value_as_address (arg1));
2729 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2732 case UNOP_PREINCREMENT:
2733 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2734 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2736 else if (unop_user_defined_p (op, arg1))
2738 return value_x_unop (arg1, op, noside);
2742 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2743 arg2 = value_ptradd (arg1, 1);
2746 struct value *tmp = arg1;
2748 arg2 = value_one (value_type (arg1));
2749 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2750 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2753 return value_assign (arg1, arg2);
2756 case UNOP_PREDECREMENT:
2757 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2758 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2760 else if (unop_user_defined_p (op, arg1))
2762 return value_x_unop (arg1, op, noside);
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 return value_assign (arg1, arg2);
2780 case UNOP_POSTINCREMENT:
2781 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2782 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2784 else if (unop_user_defined_p (op, arg1))
2786 return value_x_unop (arg1, op, noside);
2790 arg3 = value_non_lval (arg1);
2792 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2793 arg2 = value_ptradd (arg1, 1);
2796 struct value *tmp = arg1;
2798 arg2 = value_one (value_type (arg1));
2799 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2800 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2803 value_assign (arg1, arg2);
2807 case UNOP_POSTDECREMENT:
2808 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2809 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2811 else if (unop_user_defined_p (op, arg1))
2813 return value_x_unop (arg1, op, noside);
2817 arg3 = value_non_lval (arg1);
2819 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2820 arg2 = value_ptradd (arg1, -1);
2823 struct value *tmp = arg1;
2825 arg2 = value_one (value_type (arg1));
2826 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2827 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2830 value_assign (arg1, arg2);
2836 return value_of_this (exp->language_defn);
2839 /* The value is not supposed to be used. This is here to make it
2840 easier to accommodate expressions that contain types. */
2842 if (noside == EVAL_SKIP)
2844 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2846 struct type *type = exp->elts[pc + 1].type;
2848 /* If this is a typedef, then find its immediate target. We
2849 use check_typedef to resolve stubs, but we ignore its
2850 result because we do not want to dig past all
2852 check_typedef (type);
2853 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2854 type = TYPE_TARGET_TYPE (type);
2855 return allocate_value (type);
2858 error (_("Attempt to use a type name as an expression"));
2861 /* Removing this case and compiling with gcc -Wall reveals that
2862 a lot of cases are hitting this case. Some of these should
2863 probably be removed from expression.h; others are legitimate
2864 expressions which are (apparently) not fully implemented.
2866 If there are any cases landing here which mean a user error,
2867 then they should be separate cases, with more descriptive
2870 error (_("GDB does not (yet) know how to "
2871 "evaluate that kind of expression"));
2875 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
2878 /* Evaluate a subexpression of EXP, at index *POS,
2879 and return the address of that subexpression.
2880 Advance *POS over the subexpression.
2881 If the subexpression isn't an lvalue, get an error.
2882 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2883 then only the type of the result need be correct. */
2885 static struct value *
2886 evaluate_subexp_for_address (struct expression *exp, int *pos,
2896 op = exp->elts[pc].opcode;
2902 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2904 /* We can't optimize out "&*" if there's a user-defined operator*. */
2905 if (unop_user_defined_p (op, x))
2907 x = value_x_unop (x, op, noside);
2908 goto default_case_after_eval;
2911 return coerce_array (x);
2915 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2916 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2919 var = exp->elts[pc + 2].symbol;
2921 /* C++: The "address" of a reference should yield the address
2922 * of the object pointed to. Let value_addr() deal with it. */
2923 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2927 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2930 lookup_pointer_type (SYMBOL_TYPE (var));
2931 enum address_class sym_class = SYMBOL_CLASS (var);
2933 if (sym_class == LOC_CONST
2934 || sym_class == LOC_CONST_BYTES
2935 || sym_class == LOC_REGISTER)
2936 error (_("Attempt to take address of register or constant."));
2939 value_zero (type, not_lval);
2942 return address_of_variable (var, exp->elts[pc + 1].block);
2945 tem = longest_to_int (exp->elts[pc + 2].longconst);
2946 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2947 x = value_aggregate_elt (exp->elts[pc + 1].type,
2948 &exp->elts[pc + 3].string,
2951 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2956 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2957 default_case_after_eval:
2958 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2960 struct type *type = check_typedef (value_type (x));
2962 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2963 return value_zero (lookup_pointer_type (value_type (x)),
2965 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2966 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2969 error (_("Attempt to take address of "
2970 "value not located in memory."));
2972 return value_addr (x);
2976 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2977 When used in contexts where arrays will be coerced anyway, this is
2978 equivalent to `evaluate_subexp' but much faster because it avoids
2979 actually fetching array contents (perhaps obsolete now that we have
2982 Note that we currently only do the coercion for C expressions, where
2983 arrays are zero based and the coercion is correct. For other languages,
2984 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2985 to decide if coercion is appropriate. */
2988 evaluate_subexp_with_coercion (struct expression *exp,
2989 int *pos, enum noside noside)
2998 op = exp->elts[pc].opcode;
3003 var = exp->elts[pc + 2].symbol;
3004 type = check_typedef (SYMBOL_TYPE (var));
3005 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
3006 && !TYPE_VECTOR (type)
3007 && CAST_IS_CONVERSION (exp->language_defn))
3010 val = address_of_variable (var, exp->elts[pc + 1].block);
3011 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3017 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
3021 /* Evaluate a subexpression of EXP, at index *POS,
3022 and return a value for the size of that subexpression.
3023 Advance *POS over the subexpression. */
3025 static struct value *
3026 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
3028 /* FIXME: This should be size_t. */
3029 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
3036 op = exp->elts[pc].opcode;
3040 /* This case is handled specially
3041 so that we avoid creating a value for the result type.
3042 If the result type is very big, it's desirable not to
3043 create a value unnecessarily. */
3046 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3047 type = check_typedef (value_type (val));
3048 if (TYPE_CODE (type) != TYPE_CODE_PTR
3049 && TYPE_CODE (type) != TYPE_CODE_REF
3050 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
3051 error (_("Attempt to take contents of a non-pointer value."));
3052 type = check_typedef (TYPE_TARGET_TYPE (type));
3053 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3057 type = check_typedef (exp->elts[pc + 1].type);
3058 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3062 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
3064 value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3067 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3068 return value_from_longest (size_type,
3069 (LONGEST) TYPE_LENGTH (value_type (val)));
3073 /* Parse a type expression in the string [P..P+LENGTH). */
3076 parse_and_eval_type (char *p, int length)
3078 char *tmp = (char *) alloca (length + 4);
3079 struct expression *expr;
3082 memcpy (tmp + 1, p, length);
3083 tmp[length + 1] = ')';
3084 tmp[length + 2] = '0';
3085 tmp[length + 3] = '\0';
3086 expr = parse_expression (tmp);
3087 if (expr->elts[0].opcode != UNOP_CAST)
3088 error (_("Internal error in eval_type."));
3089 return expr->elts[1].type;
3093 calc_f77_array_dims (struct type *array_type)
3096 struct type *tmp_type;
3098 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
3099 error (_("Can't get dimensions for a non-array type"));
3101 tmp_type = array_type;
3103 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
3105 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)