1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986-2018 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)
74 gdb::optional<enable_thread_stack_temporaries> stack_temporaries;
75 if (*pos == 0 && target_has_execution
76 && exp->language_defn->la_language == language_cplus
77 && !thread_stack_temporaries_enabled_p (inferior_thread ()))
78 stack_temporaries.emplace (inferior_thread ());
80 retval = (*exp->language_defn->la_exp_desc->evaluate_exp)
81 (expect_type, exp, pos, noside);
83 if (stack_temporaries.has_value ()
84 && value_in_thread_stack_temporaries (retval, inferior_thread ()))
85 retval = value_non_lval (retval);
90 /* Parse the string EXP as a C expression, evaluate it,
91 and return the result as a number. */
94 parse_and_eval_address (const char *exp)
96 expression_up expr = parse_expression (exp);
98 return value_as_address (evaluate_expression (expr.get ()));
101 /* Like parse_and_eval_address, but treats the value of the expression
102 as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
104 parse_and_eval_long (const char *exp)
106 expression_up expr = parse_expression (exp);
108 return value_as_long (evaluate_expression (expr.get ()));
112 parse_and_eval (const char *exp)
114 expression_up expr = parse_expression (exp);
116 return evaluate_expression (expr.get ());
119 /* Parse up to a comma (or to a closeparen)
120 in the string EXPP as an expression, evaluate it, and return the value.
121 EXPP is advanced to point to the comma. */
124 parse_to_comma_and_eval (const char **expp)
126 expression_up expr = parse_exp_1 (expp, 0, (struct block *) 0, 1);
128 return evaluate_expression (expr.get ());
131 /* Evaluate an expression in internal prefix form
132 such as is constructed by parse.y.
134 See expression.h for info on the format of an expression. */
137 evaluate_expression (struct expression *exp)
141 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
144 /* Evaluate an expression, avoiding all memory references
145 and getting a value whose type alone is correct. */
148 evaluate_type (struct expression *exp)
152 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
155 /* Evaluate a subexpression, avoiding all memory references and
156 getting a value whose type alone is correct. */
159 evaluate_subexpression_type (struct expression *exp, int subexp)
161 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
164 /* Find the current value of a watchpoint on EXP. Return the value in
165 *VALP and *RESULTP and the chain of intermediate and final values
166 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
169 If PRESERVE_ERRORS is true, then exceptions are passed through.
170 Otherwise, if PRESERVE_ERRORS is false, then if a memory error
171 occurs while evaluating the expression, *RESULTP will be set to
172 NULL. *RESULTP may be a lazy value, if the result could not be
173 read from memory. It is used to determine whether a value is
174 user-specified (we should watch the whole value) or intermediate
175 (we should watch only the bit used to locate the final value).
177 If the final value, or any intermediate value, could not be read
178 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
179 set to any referenced values. *VALP will never be a lazy value.
180 This is the value which we store in struct breakpoint.
182 If VAL_CHAIN is non-NULL, the values put into *VAL_CHAIN will be
183 released from the value chain. If VAL_CHAIN is NULL, all generated
184 values will be left on the value chain. */
187 fetch_subexp_value (struct expression *exp, int *pc, struct value **valp,
188 struct value **resultp,
189 std::vector<value_ref_ptr> *val_chain,
192 struct value *mark, *new_mark, *result;
200 /* Evaluate the expression. */
201 mark = value_mark ();
206 result = evaluate_subexp (NULL_TYPE, exp, pc, EVAL_NORMAL);
208 CATCH (ex, RETURN_MASK_ALL)
210 /* Ignore memory errors if we want watchpoints pointing at
211 inaccessible memory to still be created; otherwise, throw the
212 error to some higher catcher. */
216 if (!preserve_errors)
220 throw_exception (ex);
226 new_mark = value_mark ();
227 if (mark == new_mark)
232 /* Make sure it's not lazy, so that after the target stops again we
233 have a non-lazy previous value to compare with. */
236 if (!value_lazy (result))
243 value_fetch_lazy (result);
246 CATCH (except, RETURN_MASK_ERROR)
255 /* Return the chain of intermediate values. We use this to
256 decide which addresses to watch. */
257 *val_chain = value_release_to_mark (mark);
261 /* Extract a field operation from an expression. If the subexpression
262 of EXP starting at *SUBEXP is not a structure dereference
263 operation, return NULL. Otherwise, return the name of the
264 dereferenced field, and advance *SUBEXP to point to the
265 subexpression of the left-hand-side of the dereference. This is
266 used when completing field names. */
269 extract_field_op (struct expression *exp, int *subexp)
274 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
275 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
277 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
278 result = &exp->elts[*subexp + 2].string;
279 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
283 /* This function evaluates brace-initializers (in C/C++) for
286 static struct value *
287 evaluate_struct_tuple (struct value *struct_val,
288 struct expression *exp,
289 int *pos, enum noside noside, int nargs)
291 struct type *struct_type = check_typedef (value_type (struct_val));
292 struct type *field_type;
297 struct value *val = NULL;
302 /* Skip static fields. */
303 while (fieldno < TYPE_NFIELDS (struct_type)
304 && field_is_static (&TYPE_FIELD (struct_type,
307 if (fieldno >= TYPE_NFIELDS (struct_type))
308 error (_("too many initializers"));
309 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
310 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
311 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
312 error (_("don't know which variant you want to set"));
314 /* Here, struct_type is the type of the inner struct,
315 while substruct_type is the type of the inner struct.
316 These are the same for normal structures, but a variant struct
317 contains anonymous union fields that contain substruct fields.
318 The value fieldno is the index of the top-level (normal or
319 anonymous union) field in struct_field, while the value
320 subfieldno is the index of the actual real (named inner) field
321 in substruct_type. */
323 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
325 val = evaluate_subexp (field_type, exp, pos, noside);
327 /* Now actually set the field in struct_val. */
329 /* Assign val to field fieldno. */
330 if (value_type (val) != field_type)
331 val = value_cast (field_type, val);
333 bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno);
334 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
335 addr = value_contents_writeable (struct_val) + bitpos / 8;
337 modify_field (struct_type, addr,
338 value_as_long (val), bitpos % 8, bitsize);
340 memcpy (addr, value_contents (val),
341 TYPE_LENGTH (value_type (val)));
347 /* Recursive helper function for setting elements of array tuples.
348 The target is ARRAY (which has bounds LOW_BOUND to HIGH_BOUND); the
349 element value is ELEMENT; EXP, POS and NOSIDE are as usual.
350 Evaluates index expresions and sets the specified element(s) of
351 ARRAY to ELEMENT. Returns last index value. */
354 init_array_element (struct value *array, struct value *element,
355 struct expression *exp, int *pos,
356 enum noside noside, LONGEST low_bound, LONGEST high_bound)
359 int element_size = TYPE_LENGTH (value_type (element));
361 if (exp->elts[*pos].opcode == BINOP_COMMA)
364 init_array_element (array, element, exp, pos, noside,
365 low_bound, high_bound);
366 return init_array_element (array, element,
367 exp, pos, noside, low_bound, high_bound);
371 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
372 if (index < low_bound || index > high_bound)
373 error (_("tuple index out of range"));
374 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
375 value_contents (element), element_size);
380 static struct value *
381 value_f90_subarray (struct value *array,
382 struct expression *exp, int *pos, enum noside noside)
385 LONGEST low_bound, high_bound;
386 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
387 enum range_type range_type
388 = (enum range_type) longest_to_int (exp->elts[pc].longconst);
392 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
393 low_bound = TYPE_LOW_BOUND (range);
395 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
397 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
398 high_bound = TYPE_HIGH_BOUND (range);
400 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
402 return value_slice (array, low_bound, high_bound - low_bound + 1);
406 /* Promote value ARG1 as appropriate before performing a unary operation
408 If the result is not appropriate for any particular language then it
409 needs to patch this function. */
412 unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
417 *arg1 = coerce_ref (*arg1);
418 type1 = check_typedef (value_type (*arg1));
420 if (is_integral_type (type1))
422 switch (language->la_language)
425 /* Perform integral promotion for ANSI C/C++.
426 If not appropropriate for any particular language
427 it needs to modify this function. */
429 struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
431 if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
432 *arg1 = value_cast (builtin_int, *arg1);
439 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
440 operation on those two operands.
441 If the result is not appropriate for any particular language then it
442 needs to patch this function. */
445 binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
446 struct value **arg1, struct value **arg2)
448 struct type *promoted_type = NULL;
452 *arg1 = coerce_ref (*arg1);
453 *arg2 = coerce_ref (*arg2);
455 type1 = check_typedef (value_type (*arg1));
456 type2 = check_typedef (value_type (*arg2));
458 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
459 && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
460 && !is_integral_type (type1))
461 || (TYPE_CODE (type2) != TYPE_CODE_FLT
462 && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
463 && !is_integral_type (type2)))
466 if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
467 || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
469 /* No promotion required. */
471 else if (TYPE_CODE (type1) == TYPE_CODE_FLT
472 || TYPE_CODE (type2) == TYPE_CODE_FLT)
474 switch (language->la_language)
480 case language_opencl:
481 /* No promotion required. */
485 /* For other languages the result type is unchanged from gdb
486 version 6.7 for backward compatibility.
487 If either arg was long double, make sure that value is also long
488 double. Otherwise use double. */
489 if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch)
490 || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
491 promoted_type = builtin_type (gdbarch)->builtin_long_double;
493 promoted_type = builtin_type (gdbarch)->builtin_double;
497 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
498 && TYPE_CODE (type2) == TYPE_CODE_BOOL)
500 /* No promotion required. */
503 /* Integral operations here. */
504 /* FIXME: Also mixed integral/booleans, with result an integer. */
506 const struct builtin_type *builtin = builtin_type (gdbarch);
507 unsigned int promoted_len1 = TYPE_LENGTH (type1);
508 unsigned int promoted_len2 = TYPE_LENGTH (type2);
509 int is_unsigned1 = TYPE_UNSIGNED (type1);
510 int is_unsigned2 = TYPE_UNSIGNED (type2);
511 unsigned int result_len;
512 int unsigned_operation;
514 /* Determine type length and signedness after promotion for
516 if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int))
519 promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
521 if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
524 promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
527 if (promoted_len1 > promoted_len2)
529 unsigned_operation = is_unsigned1;
530 result_len = promoted_len1;
532 else if (promoted_len2 > promoted_len1)
534 unsigned_operation = is_unsigned2;
535 result_len = promoted_len2;
539 unsigned_operation = is_unsigned1 || is_unsigned2;
540 result_len = promoted_len1;
543 switch (language->la_language)
549 if (result_len <= TYPE_LENGTH (builtin->builtin_int))
551 promoted_type = (unsigned_operation
552 ? builtin->builtin_unsigned_int
553 : builtin->builtin_int);
555 else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
557 promoted_type = (unsigned_operation
558 ? builtin->builtin_unsigned_long
559 : builtin->builtin_long);
563 promoted_type = (unsigned_operation
564 ? builtin->builtin_unsigned_long_long
565 : builtin->builtin_long_long);
568 case language_opencl:
569 if (result_len <= TYPE_LENGTH (lookup_signed_typename
570 (language, gdbarch, "int")))
574 ? lookup_unsigned_typename (language, gdbarch, "int")
575 : lookup_signed_typename (language, gdbarch, "int"));
577 else if (result_len <= TYPE_LENGTH (lookup_signed_typename
578 (language, gdbarch, "long")))
582 ? lookup_unsigned_typename (language, gdbarch, "long")
583 : lookup_signed_typename (language, gdbarch,"long"));
587 /* For other languages the result type is unchanged from gdb
588 version 6.7 for backward compatibility.
589 If either arg was long long, make sure that value is also long
590 long. Otherwise use long. */
591 if (unsigned_operation)
593 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
594 promoted_type = builtin->builtin_unsigned_long_long;
596 promoted_type = builtin->builtin_unsigned_long;
600 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
601 promoted_type = builtin->builtin_long_long;
603 promoted_type = builtin->builtin_long;
611 /* Promote both operands to common type. */
612 *arg1 = value_cast (promoted_type, *arg1);
613 *arg2 = value_cast (promoted_type, *arg2);
618 ptrmath_type_p (const struct language_defn *lang, struct type *type)
620 type = check_typedef (type);
621 if (TYPE_IS_REFERENCE (type))
622 type = TYPE_TARGET_TYPE (type);
624 switch (TYPE_CODE (type))
630 case TYPE_CODE_ARRAY:
631 return TYPE_VECTOR (type) ? 0 : lang->c_style_arrays;
638 /* Represents a fake method with the given parameter types. This is
639 used by the parser to construct a temporary "expected" type for
640 method overload resolution. FLAGS is used as instance flags of the
641 new type, in order to be able to make the new type represent a
642 const/volatile overload. */
647 fake_method (type_instance_flags flags,
648 int num_types, struct type **param_types);
651 /* The constructed type. */
652 struct type *type () { return &m_type; }
655 struct type m_type {};
656 main_type m_main_type {};
659 fake_method::fake_method (type_instance_flags flags,
660 int num_types, struct type **param_types)
662 struct type *type = &m_type;
664 TYPE_MAIN_TYPE (type) = &m_main_type;
665 TYPE_LENGTH (type) = 1;
666 TYPE_CODE (type) = TYPE_CODE_METHOD;
667 TYPE_CHAIN (type) = type;
668 TYPE_INSTANCE_FLAGS (type) = flags;
671 if (param_types[num_types - 1] == NULL)
674 TYPE_VARARGS (type) = 1;
676 else if (TYPE_CODE (check_typedef (param_types[num_types - 1]))
680 /* Caller should have ensured this. */
681 gdb_assert (num_types == 0);
682 TYPE_PROTOTYPED (type) = 1;
686 /* We don't use TYPE_ZALLOC here to allocate space as TYPE is owned by
687 neither an objfile nor a gdbarch. As a result we must manually
688 allocate memory for auxiliary fields, and free the memory ourselves
689 when we are done with it. */
690 TYPE_NFIELDS (type) = num_types;
691 TYPE_FIELDS (type) = (struct field *)
692 xzalloc (sizeof (struct field) * num_types);
694 while (num_types-- > 0)
695 TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
698 fake_method::~fake_method ()
700 xfree (TYPE_FIELDS (&m_type));
703 /* Helper for evaluating an OP_VAR_VALUE. */
706 evaluate_var_value (enum noside noside, const block *blk, symbol *var)
708 /* JYG: We used to just return value_zero of the symbol type if
709 we're asked to avoid side effects. Otherwise we return
710 value_of_variable (...). However I'm not sure if
711 value_of_variable () has any side effect. We need a full value
712 object returned here for whatis_exp () to call evaluate_type ()
713 and then pass the full value to value_rtti_target_type () if we
714 are dealing with a pointer or reference to a base class and print
717 struct value *ret = NULL;
721 ret = value_of_variable (var, blk);
724 CATCH (except, RETURN_MASK_ERROR)
726 if (noside != EVAL_AVOID_SIDE_EFFECTS)
727 throw_exception (except);
729 ret = value_zero (SYMBOL_TYPE (var), not_lval);
736 /* Helper for evaluating an OP_VAR_MSYM_VALUE. */
739 evaluate_var_msym_value (enum noside noside,
740 struct objfile *objfile, minimal_symbol *msymbol)
743 type *the_type = find_minsym_type_and_address (msymbol, objfile, &address);
745 if (noside == EVAL_AVOID_SIDE_EFFECTS && !TYPE_GNU_IFUNC (the_type))
746 return value_zero (the_type, not_lval);
748 return value_at_lazy (the_type, address);
751 /* Helper for returning a value when handling EVAL_SKIP. */
754 eval_skip_value (expression *exp)
756 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
759 /* Evaluate a function call. The function to be called is in
760 ARGVEC[0] and the arguments passed to the function are in
761 ARGVEC[1..NARGS]. FUNCTION_NAME is the name of the function, if
762 known. DEFAULT_RETURN_TYPE is used as the function's return type
763 if the return type is unknown. */
766 eval_call (expression *exp, enum noside noside,
767 int nargs, value **argvec,
768 const char *function_name,
769 type *default_return_type)
771 if (argvec[0] == NULL)
772 error (_("Cannot evaluate function -- may be inlined"));
773 if (noside == EVAL_AVOID_SIDE_EFFECTS)
775 /* If the return type doesn't look like a function type,
776 call an error. This can happen if somebody tries to turn
777 a variable into a function call. */
779 type *ftype = value_type (argvec[0]);
781 if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
783 /* We don't know anything about what the internal
784 function might return, but we have to return
786 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
789 else if (TYPE_CODE (ftype) == TYPE_CODE_XMETHOD)
792 = result_type_of_xmethod (argvec[0], nargs, argvec + 1);
794 if (return_type == NULL)
795 error (_("Xmethod is missing return type."));
796 return value_zero (return_type, not_lval);
798 else if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
799 || TYPE_CODE (ftype) == TYPE_CODE_METHOD)
801 if (TYPE_GNU_IFUNC (ftype))
803 CORE_ADDR address = value_address (argvec[0]);
804 type *resolved_type = find_gnu_ifunc_target_type (address);
806 if (resolved_type != NULL)
807 ftype = resolved_type;
810 type *return_type = TYPE_TARGET_TYPE (ftype);
812 if (return_type == NULL)
813 return_type = default_return_type;
815 if (return_type == NULL)
816 error_call_unknown_return_type (function_name);
818 return allocate_value (return_type);
821 error (_("Expression of type other than "
822 "\"Function returning ...\" used as function"));
824 switch (TYPE_CODE (value_type (argvec[0])))
826 case TYPE_CODE_INTERNAL_FUNCTION:
827 return call_internal_function (exp->gdbarch, exp->language_defn,
828 argvec[0], nargs, argvec + 1);
829 case TYPE_CODE_XMETHOD:
830 return call_xmethod (argvec[0], nargs, argvec + 1);
832 return call_function_by_hand (argvec[0], default_return_type,
837 /* Helper for evaluating an OP_FUNCALL. */
840 evaluate_funcall (type *expect_type, expression *exp, int *pos,
848 symbol *function = NULL;
849 char *function_name = NULL;
850 const char *var_func_name = NULL;
855 exp_opcode op = exp->elts[*pos].opcode;
856 int nargs = longest_to_int (exp->elts[pc].longconst);
857 /* Allocate arg vector, including space for the function to be
858 called in argvec[0], a potential `this', and a terminating
860 value **argvec = (value **) alloca (sizeof (value *) * (nargs + 3));
861 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
863 /* First, evaluate the structure into arg2. */
866 if (op == STRUCTOP_MEMBER)
868 arg2 = evaluate_subexp_for_address (exp, pos, noside);
872 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
875 /* If the function is a virtual function, then the aggregate
876 value (providing the structure) plays its part by providing
877 the vtable. Otherwise, it is just along for the ride: call
878 the function directly. */
880 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
882 type *a1_type = check_typedef (value_type (arg1));
883 if (noside == EVAL_SKIP)
884 tem = 1; /* Set it to the right arg index so that all
885 arguments can also be skipped. */
886 else if (TYPE_CODE (a1_type) == TYPE_CODE_METHODPTR)
888 if (noside == EVAL_AVOID_SIDE_EFFECTS)
889 arg1 = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval);
891 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
893 /* Now, say which argument to start evaluating from. */
898 else if (TYPE_CODE (a1_type) == TYPE_CODE_MEMBERPTR)
900 struct type *type_ptr
901 = lookup_pointer_type (TYPE_SELF_TYPE (a1_type));
902 struct type *target_type_ptr
903 = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type));
905 /* Now, convert these values to an address. */
906 arg2 = value_cast (type_ptr, arg2);
908 long mem_offset = value_as_long (arg1);
910 arg1 = value_from_pointer (target_type_ptr,
911 value_as_long (arg2) + mem_offset);
912 arg1 = value_ind (arg1);
916 error (_("Non-pointer-to-member value used in pointer-to-member "
919 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
921 /* Hair for method invocations. */
925 /* First, evaluate the structure into arg2. */
927 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
928 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
930 if (op == STRUCTOP_STRUCT)
932 /* If v is a variable in a register, and the user types
933 v.method (), this will produce an error, because v has no
936 A possible way around this would be to allocate a copy of
937 the variable on the stack, copy in the contents, call the
938 function, and copy out the contents. I.e. convert this
939 from call by reference to call by copy-return (or
940 whatever it's called). However, this does not work
941 because it is not the same: the method being called could
942 stash a copy of the address, and then future uses through
943 that address (after the method returns) would be expected
944 to use the variable itself, not some copy of it. */
945 arg2 = evaluate_subexp_for_address (exp, pos, noside);
949 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
951 /* Check to see if the operator '->' has been overloaded.
952 If the operator has been overloaded replace arg2 with the
953 value returned by the custom operator and continue
955 while (unop_user_defined_p (op, arg2))
957 struct value *value = NULL;
960 value = value_x_unop (arg2, op, noside);
963 CATCH (except, RETURN_MASK_ERROR)
965 if (except.error == NOT_FOUND_ERROR)
968 throw_exception (except);
975 /* Now, say which argument to start evaluating from. */
978 else if (op == OP_SCOPE
979 && overload_resolution
980 && (exp->language_defn->la_language == language_cplus))
982 /* Unpack it locally so we can properly handle overload
988 local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
989 (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
990 struct type *type = exp->elts[pc2 + 1].type;
991 name = &exp->elts[pc2 + 3].string;
994 function_name = NULL;
995 if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
997 function = cp_lookup_symbol_namespace (TYPE_NAME (type),
999 get_selected_block (0),
1001 if (function == NULL)
1002 error (_("No symbol \"%s\" in namespace \"%s\"."),
1003 name, TYPE_NAME (type));
1006 /* arg2 is left as NULL on purpose. */
1010 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1011 || TYPE_CODE (type) == TYPE_CODE_UNION);
1012 function_name = name;
1014 /* We need a properly typed value for method lookup. For
1015 static methods arg2 is otherwise unused. */
1016 arg2 = value_zero (type, lval_memory);
1021 else if (op == OP_ADL_FUNC)
1023 /* Save the function position and move pos so that the arguments
1024 can be evaluated. */
1030 func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst);
1031 (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1);
1035 /* Non-method function call. */
1039 /* If this is a C++ function wait until overload resolution. */
1040 if (op == OP_VAR_VALUE
1041 && overload_resolution
1042 && (exp->language_defn->la_language == language_cplus))
1044 (*pos) += 4; /* Skip the evaluation of the symbol. */
1049 if (op == OP_VAR_MSYM_VALUE)
1051 minimal_symbol *msym = exp->elts[*pos + 2].msymbol;
1052 var_func_name = MSYMBOL_PRINT_NAME (msym);
1054 else if (op == OP_VAR_VALUE)
1056 symbol *sym = exp->elts[*pos + 2].symbol;
1057 var_func_name = SYMBOL_PRINT_NAME (sym);
1060 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1061 type *type = value_type (argvec[0]);
1062 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1063 type = TYPE_TARGET_TYPE (type);
1064 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1066 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1068 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type,
1076 /* Evaluate arguments (if not already done, e.g., namespace::func()
1077 and overload-resolution is off). */
1078 for (; tem <= nargs; tem++)
1080 /* Ensure that array expressions are coerced into pointer
1082 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1085 /* Signal end of arglist. */
1088 if (noside == EVAL_SKIP)
1089 return eval_skip_value (exp);
1091 if (op == OP_ADL_FUNC)
1093 struct symbol *symp;
1096 int string_pc = save_pos1 + 3;
1098 /* Extract the function name. */
1099 name_len = longest_to_int (exp->elts[string_pc].longconst);
1100 func_name = (char *) alloca (name_len + 1);
1101 strcpy (func_name, &exp->elts[string_pc + 1].string);
1103 find_overload_match (&argvec[1], nargs, func_name,
1104 NON_METHOD, /* not method */
1105 NULL, NULL, /* pass NULL symbol since
1106 symbol is unknown */
1107 NULL, &symp, NULL, 0, noside);
1109 /* Now fix the expression being evaluated. */
1110 exp->elts[save_pos1 + 2].symbol = symp;
1111 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1114 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
1115 || (op == OP_SCOPE && function_name != NULL))
1117 int static_memfuncp;
1120 /* Method invocation: stuff "this" as first parameter. If the
1121 method turns out to be static we undo this below. */
1126 /* Name of method from expression. */
1127 tstr = &exp->elts[pc2 + 2].string;
1130 tstr = function_name;
1132 if (overload_resolution && (exp->language_defn->la_language
1135 /* Language is C++, do some overload resolution before
1137 struct value *valp = NULL;
1139 (void) find_overload_match (&argvec[1], nargs, tstr,
1140 METHOD, /* method */
1141 &arg2, /* the object */
1143 &static_memfuncp, 0, noside);
1145 if (op == OP_SCOPE && !static_memfuncp)
1147 /* For the time being, we don't handle this. */
1148 error (_("Call to overloaded function %s requires "
1152 argvec[1] = arg2; /* the ``this'' pointer */
1153 argvec[0] = valp; /* Use the method found after overload
1157 /* Non-C++ case -- or no overload resolution. */
1159 struct value *temp = arg2;
1161 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1163 op == STRUCTOP_STRUCT
1164 ? "structure" : "structure pointer");
1165 /* value_struct_elt updates temp with the correct value of
1166 the ``this'' pointer if necessary, so modify argvec[1] to
1167 reflect any ``this'' changes. */
1169 = value_from_longest (lookup_pointer_type(value_type (temp)),
1170 value_address (temp)
1171 + value_embedded_offset (temp));
1172 argvec[1] = arg2; /* the ``this'' pointer */
1175 /* Take out `this' if needed. */
1176 if (static_memfuncp)
1178 argvec[1] = argvec[0];
1183 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1185 /* Pointer to member. argvec[1] is already set up. */
1188 else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
1190 /* Non-member function being called. */
1191 /* fn: This can only be done for C++ functions. A C-style
1192 function in a C++ program, for instance, does not have the
1193 fields that are expected here. */
1195 if (overload_resolution && (exp->language_defn->la_language
1198 /* Language is C++, do some overload resolution before
1200 struct symbol *symp;
1203 /* If a scope has been specified disable ADL. */
1207 if (op == OP_VAR_VALUE)
1208 function = exp->elts[save_pos1+2].symbol;
1210 (void) find_overload_match (&argvec[1], nargs,
1211 NULL, /* no need for name */
1212 NON_METHOD, /* not method */
1213 NULL, function, /* the function */
1214 NULL, &symp, NULL, no_adl, noside);
1216 if (op == OP_VAR_VALUE)
1218 /* Now fix the expression being evaluated. */
1219 exp->elts[save_pos1+2].symbol = symp;
1220 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
1224 argvec[0] = value_of_variable (symp, get_selected_block (0));
1228 /* Not C++, or no overload resolution allowed. */
1229 /* Nothing to be done; argvec already correctly set up. */
1234 /* It is probably a C-style function. */
1235 /* Nothing to be done; argvec already correctly set up. */
1238 return eval_call (exp, noside, nargs, argvec, var_func_name, expect_type);
1242 evaluate_subexp_standard (struct type *expect_type,
1243 struct expression *exp, int *pos,
1247 int tem, tem2, tem3;
1249 struct value *arg1 = NULL;
1250 struct value *arg2 = NULL;
1254 struct value **argvec;
1258 struct type **arg_types;
1261 op = exp->elts[pc].opcode;
1266 tem = longest_to_int (exp->elts[pc + 2].longconst);
1267 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
1268 if (noside == EVAL_SKIP)
1269 return eval_skip_value (exp);
1270 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
1271 &exp->elts[pc + 3].string,
1272 expect_type, 0, noside);
1274 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
1279 return value_from_longest (exp->elts[pc + 1].type,
1280 exp->elts[pc + 2].longconst);
1284 return value_from_contents (exp->elts[pc + 1].type,
1285 exp->elts[pc + 2].floatconst);
1290 if (noside == EVAL_SKIP)
1291 return eval_skip_value (exp);
1294 symbol *var = exp->elts[pc + 2].symbol;
1295 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_ERROR)
1296 error_unknown_type (SYMBOL_PRINT_NAME (var));
1298 return evaluate_var_value (noside, exp->elts[pc + 1].block, var);
1301 case OP_VAR_MSYM_VALUE:
1305 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
1306 value *val = evaluate_var_msym_value (noside,
1307 exp->elts[pc + 1].objfile,
1310 type = value_type (val);
1311 if (TYPE_CODE (type) == TYPE_CODE_ERROR
1312 && (noside != EVAL_AVOID_SIDE_EFFECTS || pc != 0))
1313 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
1317 case OP_VAR_ENTRY_VALUE:
1319 if (noside == EVAL_SKIP)
1320 return eval_skip_value (exp);
1323 struct symbol *sym = exp->elts[pc + 1].symbol;
1324 struct frame_info *frame;
1326 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1327 return value_zero (SYMBOL_TYPE (sym), not_lval);
1329 if (SYMBOL_COMPUTED_OPS (sym) == NULL
1330 || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL)
1331 error (_("Symbol \"%s\" does not have any specific entry value"),
1332 SYMBOL_PRINT_NAME (sym));
1334 frame = get_selected_frame (NULL);
1335 return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
1338 case OP_FUNC_STATIC_VAR:
1339 tem = longest_to_int (exp->elts[pc + 1].longconst);
1340 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1341 if (noside == EVAL_SKIP)
1342 return eval_skip_value (exp);
1345 value *func = evaluate_subexp_standard (NULL, exp, pos, noside);
1346 CORE_ADDR addr = value_address (func);
1348 const block *blk = block_for_pc (addr);
1349 const char *var = &exp->elts[pc + 2].string;
1351 struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL);
1353 if (sym.symbol == NULL)
1354 error (_("No symbol \"%s\" in specified context."), var);
1356 return evaluate_var_value (noside, sym.block, sym.symbol);
1362 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
1366 const char *name = &exp->elts[pc + 2].string;
1370 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
1371 regno = user_reg_map_name_to_regnum (exp->gdbarch,
1372 name, strlen (name));
1374 error (_("Register $%s not available."), name);
1376 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
1377 a value with the appropriate register type. Unfortunately,
1378 we don't have easy access to the type of user registers.
1379 So for these registers, we fetch the register value regardless
1380 of the evaluation mode. */
1381 if (noside == EVAL_AVOID_SIDE_EFFECTS
1382 && regno < gdbarch_num_regs (exp->gdbarch)
1383 + gdbarch_num_pseudo_regs (exp->gdbarch))
1384 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
1386 val = value_of_register (regno, get_selected_frame (NULL));
1388 error (_("Value of register %s not available."), name);
1394 type = language_bool_type (exp->language_defn, exp->gdbarch);
1395 return value_from_longest (type, exp->elts[pc + 1].longconst);
1397 case OP_INTERNALVAR:
1399 return value_of_internalvar (exp->gdbarch,
1400 exp->elts[pc + 1].internalvar);
1403 tem = longest_to_int (exp->elts[pc + 1].longconst);
1404 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1405 if (noside == EVAL_SKIP)
1406 return eval_skip_value (exp);
1407 type = language_string_char_type (exp->language_defn, exp->gdbarch);
1408 return value_string (&exp->elts[pc + 2].string, tem, type);
1410 case OP_OBJC_NSSTRING: /* Objective C Foundation Class
1411 NSString constant. */
1412 tem = longest_to_int (exp->elts[pc + 1].longconst);
1413 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1414 if (noside == EVAL_SKIP)
1415 return eval_skip_value (exp);
1416 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
1420 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
1421 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
1422 nargs = tem3 - tem2 + 1;
1423 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
1425 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1426 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
1428 struct value *rec = allocate_value (expect_type);
1430 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
1431 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
1434 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1435 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
1437 struct type *range_type = TYPE_INDEX_TYPE (type);
1438 struct type *element_type = TYPE_TARGET_TYPE (type);
1439 struct value *array = allocate_value (expect_type);
1440 int element_size = TYPE_LENGTH (check_typedef (element_type));
1441 LONGEST low_bound, high_bound, index;
1443 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
1446 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
1449 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
1450 for (tem = nargs; --nargs >= 0;)
1452 struct value *element;
1455 element = evaluate_subexp (element_type, exp, pos, noside);
1456 if (value_type (element) != element_type)
1457 element = value_cast (element_type, element);
1460 int continue_pc = *pos;
1463 index = init_array_element (array, element, exp, pos, noside,
1464 low_bound, high_bound);
1469 if (index > high_bound)
1470 /* To avoid memory corruption. */
1471 error (_("Too many array elements"));
1472 memcpy (value_contents_raw (array)
1473 + (index - low_bound) * element_size,
1474 value_contents (element),
1482 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1483 && TYPE_CODE (type) == TYPE_CODE_SET)
1485 struct value *set = allocate_value (expect_type);
1486 gdb_byte *valaddr = value_contents_raw (set);
1487 struct type *element_type = TYPE_INDEX_TYPE (type);
1488 struct type *check_type = element_type;
1489 LONGEST low_bound, high_bound;
1491 /* Get targettype of elementtype. */
1492 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
1493 || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
1494 check_type = TYPE_TARGET_TYPE (check_type);
1496 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
1497 error (_("(power)set type with unknown size"));
1498 memset (valaddr, '\0', TYPE_LENGTH (type));
1499 for (tem = 0; tem < nargs; tem++)
1501 LONGEST range_low, range_high;
1502 struct type *range_low_type, *range_high_type;
1503 struct value *elem_val;
1505 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1506 range_low_type = range_high_type = value_type (elem_val);
1507 range_low = range_high = value_as_long (elem_val);
1509 /* Check types of elements to avoid mixture of elements from
1510 different types. Also check if type of element is "compatible"
1511 with element type of powerset. */
1512 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
1513 range_low_type = TYPE_TARGET_TYPE (range_low_type);
1514 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
1515 range_high_type = TYPE_TARGET_TYPE (range_high_type);
1516 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
1517 || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
1518 && (range_low_type != range_high_type)))
1519 /* different element modes. */
1520 error (_("POWERSET tuple elements of different mode"));
1521 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
1522 || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
1523 && range_low_type != check_type))
1524 error (_("incompatible POWERSET tuple elements"));
1525 if (range_low > range_high)
1527 warning (_("empty POWERSET tuple range"));
1530 if (range_low < low_bound || range_high > high_bound)
1531 error (_("POWERSET tuple element out of range"));
1532 range_low -= low_bound;
1533 range_high -= low_bound;
1534 for (; range_low <= range_high; range_low++)
1536 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
1538 if (gdbarch_bits_big_endian (exp->gdbarch))
1539 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
1540 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
1547 argvec = XALLOCAVEC (struct value *, nargs);
1548 for (tem = 0; tem < nargs; tem++)
1550 /* Ensure that array expressions are coerced into pointer
1552 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1554 if (noside == EVAL_SKIP)
1555 return eval_skip_value (exp);
1556 return value_array (tem2, tem3, argvec);
1560 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1562 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1564 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1566 if (noside == EVAL_SKIP)
1567 return eval_skip_value (exp);
1568 return value_slice (array, lowbound, upper - lowbound + 1);
1572 /* Skip third and second args to evaluate the first one. */
1573 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1574 if (value_logical_not (arg1))
1576 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1577 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1581 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1582 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1586 case OP_OBJC_SELECTOR:
1587 { /* Objective C @selector operator. */
1588 char *sel = &exp->elts[pc + 2].string;
1589 int len = longest_to_int (exp->elts[pc + 1].longconst);
1590 struct type *selector_type;
1592 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1593 if (noside == EVAL_SKIP)
1594 return eval_skip_value (exp);
1597 sel[len] = 0; /* Make sure it's terminated. */
1599 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1600 return value_from_longest (selector_type,
1601 lookup_child_selector (exp->gdbarch, sel));
1604 case OP_OBJC_MSGCALL:
1605 { /* Objective C message (method) call. */
1607 CORE_ADDR responds_selector = 0;
1608 CORE_ADDR method_selector = 0;
1610 CORE_ADDR selector = 0;
1612 int struct_return = 0;
1613 enum noside sub_no_side = EVAL_NORMAL;
1615 struct value *msg_send = NULL;
1616 struct value *msg_send_stret = NULL;
1617 int gnu_runtime = 0;
1619 struct value *target = NULL;
1620 struct value *method = NULL;
1621 struct value *called_method = NULL;
1623 struct type *selector_type = NULL;
1624 struct type *long_type;
1626 struct value *ret = NULL;
1629 selector = exp->elts[pc + 1].longconst;
1630 nargs = exp->elts[pc + 2].longconst;
1631 argvec = XALLOCAVEC (struct value *, nargs + 5);
1635 long_type = builtin_type (exp->gdbarch)->builtin_long;
1636 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1638 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1639 sub_no_side = EVAL_NORMAL;
1641 sub_no_side = noside;
1643 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1645 if (value_as_long (target) == 0)
1646 return value_from_longest (long_type, 0);
1648 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym)
1651 /* Find the method dispatch (Apple runtime) or method lookup
1652 (GNU runtime) function for Objective-C. These will be used
1653 to lookup the symbol information for the method. If we
1654 can't find any symbol information, then we'll use these to
1655 call the method, otherwise we can call the method
1656 directly. The msg_send_stret function is used in the special
1657 case of a method that returns a structure (Apple runtime
1661 struct type *type = selector_type;
1663 type = lookup_function_type (type);
1664 type = lookup_pointer_type (type);
1665 type = lookup_function_type (type);
1666 type = lookup_pointer_type (type);
1668 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1670 = find_function_in_inferior ("objc_msg_lookup", NULL);
1672 msg_send = value_from_pointer (type, value_as_address (msg_send));
1673 msg_send_stret = value_from_pointer (type,
1674 value_as_address (msg_send_stret));
1678 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1679 /* Special dispatcher for methods returning structs. */
1681 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1684 /* Verify the target object responds to this method. The
1685 standard top-level 'Object' class uses a different name for
1686 the verification method than the non-standard, but more
1687 often used, 'NSObject' class. Make sure we check for both. */
1690 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1691 if (responds_selector == 0)
1693 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1695 if (responds_selector == 0)
1696 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1699 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1700 if (method_selector == 0)
1702 = lookup_child_selector (exp->gdbarch, "methodFor:");
1704 if (method_selector == 0)
1705 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1707 /* Call the verification method, to make sure that the target
1708 class implements the desired method. */
1710 argvec[0] = msg_send;
1712 argvec[2] = value_from_longest (long_type, responds_selector);
1713 argvec[3] = value_from_longest (long_type, selector);
1716 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1719 /* Function objc_msg_lookup returns a pointer. */
1721 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1723 if (value_as_long (ret) == 0)
1724 error (_("Target does not respond to this message selector."));
1726 /* Call "methodForSelector:" method, to get the address of a
1727 function method that implements this selector for this
1728 class. If we can find a symbol at that address, then we
1729 know the return type, parameter types etc. (that's a good
1732 argvec[0] = msg_send;
1734 argvec[2] = value_from_longest (long_type, method_selector);
1735 argvec[3] = value_from_longest (long_type, selector);
1738 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1742 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1745 /* ret should now be the selector. */
1747 addr = value_as_long (ret);
1750 struct symbol *sym = NULL;
1752 /* The address might point to a function descriptor;
1753 resolve it to the actual code address instead. */
1754 addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
1755 current_top_target ());
1757 /* Is it a high_level symbol? */
1758 sym = find_pc_function (addr);
1760 method = value_of_variable (sym, 0);
1763 /* If we found a method with symbol information, check to see
1764 if it returns a struct. Otherwise assume it doesn't. */
1769 struct type *val_type;
1771 funaddr = find_function_addr (method, &val_type);
1773 block_for_pc (funaddr);
1775 val_type = check_typedef (val_type);
1777 if ((val_type == NULL)
1778 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1780 if (expect_type != NULL)
1781 val_type = expect_type;
1784 struct_return = using_struct_return (exp->gdbarch, method,
1787 else if (expect_type != NULL)
1789 struct_return = using_struct_return (exp->gdbarch, NULL,
1790 check_typedef (expect_type));
1793 /* Found a function symbol. Now we will substitute its
1794 value in place of the message dispatcher (obj_msgSend),
1795 so that we call the method directly instead of thru
1796 the dispatcher. The main reason for doing this is that
1797 we can now evaluate the return value and parameter values
1798 according to their known data types, in case we need to
1799 do things like promotion, dereferencing, special handling
1800 of structs and doubles, etc.
1802 We want to use the type signature of 'method', but still
1803 jump to objc_msgSend() or objc_msgSend_stret() to better
1804 mimic the behavior of the runtime. */
1808 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1809 error (_("method address has symbol information "
1810 "with non-function type; skipping"));
1812 /* Create a function pointer of the appropriate type, and
1813 replace its value with the value of msg_send or
1814 msg_send_stret. We must use a pointer here, as
1815 msg_send and msg_send_stret are of pointer type, and
1816 the representation may be different on systems that use
1817 function descriptors. */
1820 = value_from_pointer (lookup_pointer_type (value_type (method)),
1821 value_as_address (msg_send_stret));
1824 = value_from_pointer (lookup_pointer_type (value_type (method)),
1825 value_as_address (msg_send));
1830 called_method = msg_send_stret;
1832 called_method = msg_send;
1835 if (noside == EVAL_SKIP)
1836 return eval_skip_value (exp);
1838 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1840 /* If the return type doesn't look like a function type,
1841 call an error. This can happen if somebody tries to
1842 turn a variable into a function call. This is here
1843 because people often want to call, eg, strcmp, which
1844 gdb doesn't know is a function. If gdb isn't asked for
1845 it's opinion (ie. through "whatis"), it won't offer
1848 struct type *type = value_type (called_method);
1850 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1851 type = TYPE_TARGET_TYPE (type);
1852 type = TYPE_TARGET_TYPE (type);
1856 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1857 return allocate_value (expect_type);
1859 return allocate_value (type);
1862 error (_("Expression of type other than "
1863 "\"method returning ...\" used as a method"));
1866 /* Now depending on whether we found a symbol for the method,
1867 we will either call the runtime dispatcher or the method
1870 argvec[0] = called_method;
1872 argvec[2] = value_from_longest (long_type, selector);
1873 /* User-supplied arguments. */
1874 for (tem = 0; tem < nargs; tem++)
1875 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1876 argvec[tem + 3] = 0;
1878 if (gnu_runtime && (method != NULL))
1880 /* Function objc_msg_lookup returns a pointer. */
1881 deprecated_set_value_type (argvec[0],
1882 lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
1884 = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1887 ret = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1893 return evaluate_funcall (expect_type, exp, pos, noside);
1895 case OP_F77_UNDETERMINED_ARGLIST:
1897 /* Remember that in F77, functions, substring ops and
1898 array subscript operations cannot be disambiguated
1899 at parse time. We have made all array subscript operations,
1900 substring operations as well as function calls come here
1901 and we now have to discover what the heck this thing actually was.
1902 If it is a function, we process just as if we got an OP_FUNCALL. */
1904 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1907 /* First determine the type code we are dealing with. */
1908 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1909 type = check_typedef (value_type (arg1));
1910 code = TYPE_CODE (type);
1912 if (code == TYPE_CODE_PTR)
1914 /* Fortran always passes variable to subroutines as pointer.
1915 So we need to look into its target type to see if it is
1916 array, string or function. If it is, we need to switch
1917 to the target value the original one points to. */
1918 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1920 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1921 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1922 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1924 arg1 = value_ind (arg1);
1925 type = check_typedef (value_type (arg1));
1926 code = TYPE_CODE (type);
1932 case TYPE_CODE_ARRAY:
1933 if (exp->elts[*pos].opcode == OP_RANGE)
1934 return value_f90_subarray (arg1, exp, pos, noside);
1936 goto multi_f77_subscript;
1938 case TYPE_CODE_STRING:
1939 if (exp->elts[*pos].opcode == OP_RANGE)
1940 return value_f90_subarray (arg1, exp, pos, noside);
1943 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1944 return value_subscript (arg1, value_as_long (arg2));
1948 case TYPE_CODE_FUNC:
1949 /* It's a function call. */
1950 /* Allocate arg vector, including space for the function to be
1951 called in argvec[0] and a terminating NULL. */
1952 argvec = (struct value **)
1953 alloca (sizeof (struct value *) * (nargs + 2));
1956 for (; tem <= nargs; tem++)
1957 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1958 argvec[tem] = 0; /* signal end of arglist */
1959 if (noside == EVAL_SKIP)
1960 return eval_skip_value (exp);
1961 return eval_call (exp, noside, nargs, argvec, NULL, expect_type);
1964 error (_("Cannot perform substring on this type"));
1968 /* We have a complex number, There should be 2 floating
1969 point numbers that compose it. */
1971 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1972 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1974 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1976 case STRUCTOP_STRUCT:
1977 tem = longest_to_int (exp->elts[pc + 1].longconst);
1978 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1979 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1980 if (noside == EVAL_SKIP)
1981 return eval_skip_value (exp);
1982 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
1984 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1985 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
1989 tem = longest_to_int (exp->elts[pc + 1].longconst);
1990 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1991 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1992 if (noside == EVAL_SKIP)
1993 return eval_skip_value (exp);
1995 /* Check to see if operator '->' has been overloaded. If so replace
1996 arg1 with the value returned by evaluating operator->(). */
1997 while (unop_user_defined_p (op, arg1))
1999 struct value *value = NULL;
2002 value = value_x_unop (arg1, op, noside);
2005 CATCH (except, RETURN_MASK_ERROR)
2007 if (except.error == NOT_FOUND_ERROR)
2010 throw_exception (except);
2017 /* JYG: if print object is on we need to replace the base type
2018 with rtti type in order to continue on with successful
2019 lookup of member / method only available in the rtti type. */
2021 struct type *type = value_type (arg1);
2022 struct type *real_type;
2023 int full, using_enc;
2025 struct value_print_options opts;
2027 get_user_print_options (&opts);
2028 if (opts.objectprint && TYPE_TARGET_TYPE(type)
2029 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
2031 real_type = value_rtti_indirect_type (arg1, &full, &top,
2034 arg1 = value_cast (real_type, arg1);
2038 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
2039 NULL, "structure pointer");
2040 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2041 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
2044 case STRUCTOP_MEMBER:
2046 if (op == STRUCTOP_MEMBER)
2047 arg1 = evaluate_subexp_for_address (exp, pos, noside);
2049 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2051 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2053 if (noside == EVAL_SKIP)
2054 return eval_skip_value (exp);
2056 type = check_typedef (value_type (arg2));
2057 switch (TYPE_CODE (type))
2059 case TYPE_CODE_METHODPTR:
2060 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2061 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
2064 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
2065 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
2066 return value_ind (arg2);
2069 case TYPE_CODE_MEMBERPTR:
2070 /* Now, convert these values to an address. */
2071 arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)),
2074 mem_offset = value_as_long (arg2);
2076 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2077 value_as_long (arg1) + mem_offset);
2078 return value_ind (arg3);
2081 error (_("non-pointer-to-member value used "
2082 "in pointer-to-member construct"));
2087 type_instance_flags flags
2088 = (type_instance_flag_value) longest_to_int (exp->elts[pc + 1].longconst);
2089 nargs = longest_to_int (exp->elts[pc + 2].longconst);
2090 arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
2091 for (ix = 0; ix < nargs; ++ix)
2092 arg_types[ix] = exp->elts[pc + 2 + ix + 1].type;
2094 fake_method expect_type (flags, nargs, arg_types);
2095 *(pos) += 4 + nargs;
2096 return evaluate_subexp_standard (expect_type.type (), exp, pos, noside);
2100 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2101 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2102 if (noside == EVAL_SKIP)
2103 return eval_skip_value (exp);
2104 if (binop_user_defined_p (op, arg1, arg2))
2105 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2107 return value_concat (arg1, arg2);
2110 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2111 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2113 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2115 if (binop_user_defined_p (op, arg1, arg2))
2116 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2118 return value_assign (arg1, arg2);
2120 case BINOP_ASSIGN_MODIFY:
2122 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2123 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2124 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2126 op = exp->elts[pc + 1].opcode;
2127 if (binop_user_defined_p (op, arg1, arg2))
2128 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
2129 else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn,
2131 && is_integral_type (value_type (arg2)))
2132 arg2 = value_ptradd (arg1, value_as_long (arg2));
2133 else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn,
2135 && is_integral_type (value_type (arg2)))
2136 arg2 = value_ptradd (arg1, - value_as_long (arg2));
2139 struct value *tmp = arg1;
2141 /* For shift and integer exponentiation operations,
2142 only promote the first argument. */
2143 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2144 && is_integral_type (value_type (arg2)))
2145 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
2147 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2149 arg2 = value_binop (tmp, arg2, op);
2151 return value_assign (arg1, arg2);
2154 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2155 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2156 if (noside == EVAL_SKIP)
2157 return eval_skip_value (exp);
2158 if (binop_user_defined_p (op, arg1, arg2))
2159 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2160 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2161 && is_integral_type (value_type (arg2)))
2162 return value_ptradd (arg1, value_as_long (arg2));
2163 else if (ptrmath_type_p (exp->language_defn, value_type (arg2))
2164 && is_integral_type (value_type (arg1)))
2165 return value_ptradd (arg2, value_as_long (arg1));
2168 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2169 return value_binop (arg1, arg2, BINOP_ADD);
2173 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2174 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2175 if (noside == EVAL_SKIP)
2176 return eval_skip_value (exp);
2177 if (binop_user_defined_p (op, arg1, arg2))
2178 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2179 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2180 && ptrmath_type_p (exp->language_defn, value_type (arg2)))
2182 /* FIXME -- should be ptrdiff_t */
2183 type = builtin_type (exp->gdbarch)->builtin_long;
2184 return value_from_longest (type, value_ptrdiff (arg1, arg2));
2186 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2187 && is_integral_type (value_type (arg2)))
2188 return value_ptradd (arg1, - value_as_long (arg2));
2191 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2192 return value_binop (arg1, arg2, BINOP_SUB);
2203 case BINOP_BITWISE_AND:
2204 case BINOP_BITWISE_IOR:
2205 case BINOP_BITWISE_XOR:
2206 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2207 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2208 if (noside == EVAL_SKIP)
2209 return eval_skip_value (exp);
2210 if (binop_user_defined_p (op, arg1, arg2))
2211 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2214 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2215 fudge arg2 to avoid division-by-zero, the caller is
2216 (theoretically) only looking for the type of the result. */
2217 if (noside == EVAL_AVOID_SIDE_EFFECTS
2218 /* ??? Do we really want to test for BINOP_MOD here?
2219 The implementation of value_binop gives it a well-defined
2222 || op == BINOP_INTDIV
2225 && value_logical_not (arg2))
2227 struct value *v_one, *retval;
2229 v_one = value_one (value_type (arg2));
2230 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
2231 retval = value_binop (arg1, v_one, op);
2236 /* For shift and integer exponentiation operations,
2237 only promote the first argument. */
2238 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2239 && is_integral_type (value_type (arg2)))
2240 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2242 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2244 return value_binop (arg1, arg2, op);
2248 case BINOP_SUBSCRIPT:
2249 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2250 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2251 if (noside == EVAL_SKIP)
2252 return eval_skip_value (exp);
2253 if (binop_user_defined_p (op, arg1, arg2))
2254 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2257 /* If the user attempts to subscript something that is not an
2258 array or pointer type (like a plain int variable for example),
2259 then report this as an error. */
2261 arg1 = coerce_ref (arg1);
2262 type = check_typedef (value_type (arg1));
2263 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
2264 && TYPE_CODE (type) != TYPE_CODE_PTR)
2266 if (TYPE_NAME (type))
2267 error (_("cannot subscript something of type `%s'"),
2270 error (_("cannot subscript requested type"));
2273 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2274 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
2276 return value_subscript (arg1, value_as_long (arg2));
2278 case MULTI_SUBSCRIPT:
2280 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2281 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2284 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2285 /* FIXME: EVAL_SKIP handling may not be correct. */
2286 if (noside == EVAL_SKIP)
2290 return eval_skip_value (exp);
2292 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2293 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2295 /* If the user attempts to subscript something that has no target
2296 type (like a plain int variable for example), then report this
2299 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
2302 arg1 = value_zero (type, VALUE_LVAL (arg1));
2308 error (_("cannot subscript something of type `%s'"),
2309 TYPE_NAME (value_type (arg1)));
2313 if (binop_user_defined_p (op, arg1, arg2))
2315 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
2319 arg1 = coerce_ref (arg1);
2320 type = check_typedef (value_type (arg1));
2322 switch (TYPE_CODE (type))
2325 case TYPE_CODE_ARRAY:
2326 case TYPE_CODE_STRING:
2327 arg1 = value_subscript (arg1, value_as_long (arg2));
2331 if (TYPE_NAME (type))
2332 error (_("cannot subscript something of type `%s'"),
2335 error (_("cannot subscript requested type"));
2341 multi_f77_subscript:
2343 LONGEST subscript_array[MAX_FORTRAN_DIMS];
2344 int ndimensions = 1, i;
2345 struct value *array = arg1;
2347 if (nargs > MAX_FORTRAN_DIMS)
2348 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
2350 ndimensions = calc_f77_array_dims (type);
2352 if (nargs != ndimensions)
2353 error (_("Wrong number of subscripts"));
2355 gdb_assert (nargs > 0);
2357 /* Now that we know we have a legal array subscript expression
2358 let us actually find out where this element exists in the array. */
2360 /* Take array indices left to right. */
2361 for (i = 0; i < nargs; i++)
2363 /* Evaluate each subscript; it must be a legal integer in F77. */
2364 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2366 /* Fill in the subscript array. */
2368 subscript_array[i] = value_as_long (arg2);
2371 /* Internal type of array is arranged right to left. */
2372 for (i = nargs; i > 0; i--)
2374 struct type *array_type = check_typedef (value_type (array));
2375 LONGEST index = subscript_array[i - 1];
2377 array = value_subscripted_rvalue (array, index,
2378 f77_get_lowerbound (array_type));
2384 case BINOP_LOGICAL_AND:
2385 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2386 if (noside == EVAL_SKIP)
2388 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2389 return eval_skip_value (exp);
2393 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2396 if (binop_user_defined_p (op, arg1, arg2))
2398 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2399 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2403 tem = value_logical_not (arg1);
2404 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2405 (tem ? EVAL_SKIP : noside));
2406 type = language_bool_type (exp->language_defn, exp->gdbarch);
2407 return value_from_longest (type,
2408 (LONGEST) (!tem && !value_logical_not (arg2)));
2411 case BINOP_LOGICAL_OR:
2412 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2413 if (noside == EVAL_SKIP)
2415 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2416 return eval_skip_value (exp);
2420 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2423 if (binop_user_defined_p (op, arg1, arg2))
2425 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2426 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2430 tem = value_logical_not (arg1);
2431 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2432 (!tem ? EVAL_SKIP : noside));
2433 type = language_bool_type (exp->language_defn, exp->gdbarch);
2434 return value_from_longest (type,
2435 (LONGEST) (!tem || !value_logical_not (arg2)));
2439 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2440 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2441 if (noside == EVAL_SKIP)
2442 return eval_skip_value (exp);
2443 if (binop_user_defined_p (op, arg1, arg2))
2445 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2449 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2450 tem = value_equal (arg1, arg2);
2451 type = language_bool_type (exp->language_defn, exp->gdbarch);
2452 return value_from_longest (type, (LONGEST) tem);
2455 case BINOP_NOTEQUAL:
2456 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2457 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2458 if (noside == EVAL_SKIP)
2459 return eval_skip_value (exp);
2460 if (binop_user_defined_p (op, arg1, arg2))
2462 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2466 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2467 tem = value_equal (arg1, arg2);
2468 type = language_bool_type (exp->language_defn, exp->gdbarch);
2469 return value_from_longest (type, (LONGEST) ! tem);
2473 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2474 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2475 if (noside == EVAL_SKIP)
2476 return eval_skip_value (exp);
2477 if (binop_user_defined_p (op, arg1, arg2))
2479 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2483 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2484 tem = value_less (arg1, arg2);
2485 type = language_bool_type (exp->language_defn, exp->gdbarch);
2486 return value_from_longest (type, (LONGEST) tem);
2490 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2491 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2492 if (noside == EVAL_SKIP)
2493 return eval_skip_value (exp);
2494 if (binop_user_defined_p (op, arg1, arg2))
2496 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2500 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2501 tem = value_less (arg2, arg1);
2502 type = language_bool_type (exp->language_defn, exp->gdbarch);
2503 return value_from_longest (type, (LONGEST) tem);
2507 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2508 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2509 if (noside == EVAL_SKIP)
2510 return eval_skip_value (exp);
2511 if (binop_user_defined_p (op, arg1, arg2))
2513 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2517 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2518 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2519 type = language_bool_type (exp->language_defn, exp->gdbarch);
2520 return value_from_longest (type, (LONGEST) tem);
2524 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2525 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2526 if (noside == EVAL_SKIP)
2527 return eval_skip_value (exp);
2528 if (binop_user_defined_p (op, arg1, arg2))
2530 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2534 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2535 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2536 type = language_bool_type (exp->language_defn, exp->gdbarch);
2537 return value_from_longest (type, (LONGEST) tem);
2541 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2542 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2543 if (noside == EVAL_SKIP)
2544 return eval_skip_value (exp);
2545 type = check_typedef (value_type (arg2));
2546 if (TYPE_CODE (type) != TYPE_CODE_INT
2547 && TYPE_CODE (type) != TYPE_CODE_ENUM)
2548 error (_("Non-integral right operand for \"@\" operator."));
2549 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2551 return allocate_repeat_value (value_type (arg1),
2552 longest_to_int (value_as_long (arg2)));
2555 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2558 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2559 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2562 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2563 if (noside == EVAL_SKIP)
2564 return eval_skip_value (exp);
2565 if (unop_user_defined_p (op, arg1))
2566 return value_x_unop (arg1, op, noside);
2569 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2570 return value_pos (arg1);
2574 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2575 if (noside == EVAL_SKIP)
2576 return eval_skip_value (exp);
2577 if (unop_user_defined_p (op, arg1))
2578 return value_x_unop (arg1, op, noside);
2581 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2582 return value_neg (arg1);
2585 case UNOP_COMPLEMENT:
2586 /* C++: check for and handle destructor names. */
2588 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2589 if (noside == EVAL_SKIP)
2590 return eval_skip_value (exp);
2591 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2592 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2595 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2596 return value_complement (arg1);
2599 case UNOP_LOGICAL_NOT:
2600 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2601 if (noside == EVAL_SKIP)
2602 return eval_skip_value (exp);
2603 if (unop_user_defined_p (op, arg1))
2604 return value_x_unop (arg1, op, noside);
2607 type = language_bool_type (exp->language_defn, exp->gdbarch);
2608 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2612 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2613 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2614 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2615 type = check_typedef (value_type (arg1));
2616 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2617 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2618 error (_("Attempt to dereference pointer "
2619 "to member without an object"));
2620 if (noside == EVAL_SKIP)
2621 return eval_skip_value (exp);
2622 if (unop_user_defined_p (op, arg1))
2623 return value_x_unop (arg1, op, noside);
2624 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2626 type = check_typedef (value_type (arg1));
2627 if (TYPE_CODE (type) == TYPE_CODE_PTR
2628 || TYPE_IS_REFERENCE (type)
2629 /* In C you can dereference an array to get the 1st elt. */
2630 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2632 return value_zero (TYPE_TARGET_TYPE (type),
2634 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2635 /* GDB allows dereferencing an int. */
2636 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2639 error (_("Attempt to take contents of a non-pointer value."));
2642 /* Allow * on an integer so we can cast it to whatever we want.
2643 This returns an int, which seems like the most C-like thing to
2644 do. "long long" variables are rare enough that
2645 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2646 if (TYPE_CODE (type) == TYPE_CODE_INT)
2647 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2648 (CORE_ADDR) value_as_address (arg1));
2649 return value_ind (arg1);
2652 /* C++: check for and handle pointer to members. */
2654 if (noside == EVAL_SKIP)
2656 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2657 return eval_skip_value (exp);
2661 struct value *retvalp = evaluate_subexp_for_address (exp, pos,
2668 if (noside == EVAL_SKIP)
2670 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2671 return eval_skip_value (exp);
2673 return evaluate_subexp_for_sizeof (exp, pos, noside);
2678 = value_type (evaluate_subexp (NULL_TYPE, exp, pos,
2679 EVAL_AVOID_SIDE_EFFECTS));
2680 /* FIXME: This should be size_t. */
2681 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2682 ULONGEST align = type_align (type);
2684 error (_("could not determine alignment of type"));
2685 return value_from_longest (size_type, align);
2690 type = exp->elts[pc + 1].type;
2691 return evaluate_subexp_for_cast (exp, pos, noside, type);
2693 case UNOP_CAST_TYPE:
2694 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2695 type = value_type (arg1);
2696 return evaluate_subexp_for_cast (exp, pos, noside, type);
2698 case UNOP_DYNAMIC_CAST:
2699 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2700 type = value_type (arg1);
2701 arg1 = evaluate_subexp (type, exp, pos, noside);
2702 if (noside == EVAL_SKIP)
2703 return eval_skip_value (exp);
2704 return value_dynamic_cast (type, arg1);
2706 case UNOP_REINTERPRET_CAST:
2707 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2708 type = value_type (arg1);
2709 arg1 = evaluate_subexp (type, exp, pos, noside);
2710 if (noside == EVAL_SKIP)
2711 return eval_skip_value (exp);
2712 return value_reinterpret_cast (type, arg1);
2716 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2717 if (noside == EVAL_SKIP)
2718 return eval_skip_value (exp);
2719 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2720 return value_zero (exp->elts[pc + 1].type, lval_memory);
2722 return value_at_lazy (exp->elts[pc + 1].type,
2723 value_as_address (arg1));
2725 case UNOP_MEMVAL_TYPE:
2726 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2727 type = value_type (arg1);
2728 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2729 if (noside == EVAL_SKIP)
2730 return eval_skip_value (exp);
2731 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2732 return value_zero (type, lval_memory);
2734 return value_at_lazy (type, value_as_address (arg1));
2736 case UNOP_PREINCREMENT:
2737 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2738 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2740 else if (unop_user_defined_p (op, arg1))
2742 return value_x_unop (arg1, op, noside);
2746 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2747 arg2 = value_ptradd (arg1, 1);
2750 struct value *tmp = arg1;
2752 arg2 = value_one (value_type (arg1));
2753 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2754 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2757 return value_assign (arg1, arg2);
2760 case UNOP_PREDECREMENT:
2761 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2762 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2764 else if (unop_user_defined_p (op, arg1))
2766 return value_x_unop (arg1, op, noside);
2770 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2771 arg2 = value_ptradd (arg1, -1);
2774 struct value *tmp = arg1;
2776 arg2 = value_one (value_type (arg1));
2777 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2778 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2781 return value_assign (arg1, arg2);
2784 case UNOP_POSTINCREMENT:
2785 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2786 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2788 else if (unop_user_defined_p (op, arg1))
2790 return value_x_unop (arg1, op, noside);
2794 arg3 = value_non_lval (arg1);
2796 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2797 arg2 = value_ptradd (arg1, 1);
2800 struct value *tmp = arg1;
2802 arg2 = value_one (value_type (arg1));
2803 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2804 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2807 value_assign (arg1, arg2);
2811 case UNOP_POSTDECREMENT:
2812 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2813 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2815 else if (unop_user_defined_p (op, arg1))
2817 return value_x_unop (arg1, op, noside);
2821 arg3 = value_non_lval (arg1);
2823 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2824 arg2 = value_ptradd (arg1, -1);
2827 struct value *tmp = arg1;
2829 arg2 = value_one (value_type (arg1));
2830 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2831 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2834 value_assign (arg1, arg2);
2840 return value_of_this (exp->language_defn);
2843 /* The value is not supposed to be used. This is here to make it
2844 easier to accommodate expressions that contain types. */
2846 if (noside == EVAL_SKIP)
2847 return eval_skip_value (exp);
2848 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2849 return allocate_value (exp->elts[pc + 1].type);
2851 error (_("Attempt to use a type name as an expression"));
2855 if (noside == EVAL_SKIP)
2857 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2858 return eval_skip_value (exp);
2860 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2862 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2863 struct value *result;
2865 result = evaluate_subexp (NULL_TYPE, exp, pos,
2866 EVAL_AVOID_SIDE_EFFECTS);
2868 /* 'decltype' has special semantics for lvalues. */
2869 if (op == OP_DECLTYPE
2870 && (sub_op == BINOP_SUBSCRIPT
2871 || sub_op == STRUCTOP_MEMBER
2872 || sub_op == STRUCTOP_MPTR
2873 || sub_op == UNOP_IND
2874 || sub_op == STRUCTOP_STRUCT
2875 || sub_op == STRUCTOP_PTR
2876 || sub_op == OP_SCOPE))
2878 struct type *type = value_type (result);
2880 if (!TYPE_IS_REFERENCE (type))
2882 type = lookup_lvalue_reference_type (type);
2883 result = allocate_value (type);
2890 error (_("Attempt to use a type as an expression"));
2894 struct value *result;
2895 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2897 if (sub_op == OP_TYPE || sub_op == OP_DECLTYPE || sub_op == OP_TYPEOF)
2898 result = evaluate_subexp (NULL_TYPE, exp, pos,
2899 EVAL_AVOID_SIDE_EFFECTS);
2901 result = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2903 if (noside != EVAL_NORMAL)
2904 return allocate_value (cplus_typeid_type (exp->gdbarch));
2906 return cplus_typeid (result);
2910 /* Removing this case and compiling with gcc -Wall reveals that
2911 a lot of cases are hitting this case. Some of these should
2912 probably be removed from expression.h; others are legitimate
2913 expressions which are (apparently) not fully implemented.
2915 If there are any cases landing here which mean a user error,
2916 then they should be separate cases, with more descriptive
2919 error (_("GDB does not (yet) know how to "
2920 "evaluate that kind of expression"));
2923 gdb_assert_not_reached ("missed return?");
2926 /* Evaluate a subexpression of EXP, at index *POS,
2927 and return the address of that subexpression.
2928 Advance *POS over the subexpression.
2929 If the subexpression isn't an lvalue, get an error.
2930 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2931 then only the type of the result need be correct. */
2933 static struct value *
2934 evaluate_subexp_for_address (struct expression *exp, int *pos,
2944 op = exp->elts[pc].opcode;
2950 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2952 /* We can't optimize out "&*" if there's a user-defined operator*. */
2953 if (unop_user_defined_p (op, x))
2955 x = value_x_unop (x, op, noside);
2956 goto default_case_after_eval;
2959 return coerce_array (x);
2963 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2964 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2966 case UNOP_MEMVAL_TYPE:
2971 x = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2972 type = value_type (x);
2973 return value_cast (lookup_pointer_type (type),
2974 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2978 var = exp->elts[pc + 2].symbol;
2980 /* C++: The "address" of a reference should yield the address
2981 * of the object pointed to. Let value_addr() deal with it. */
2982 if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var)))
2986 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2989 lookup_pointer_type (SYMBOL_TYPE (var));
2990 enum address_class sym_class = SYMBOL_CLASS (var);
2992 if (sym_class == LOC_CONST
2993 || sym_class == LOC_CONST_BYTES
2994 || sym_class == LOC_REGISTER)
2995 error (_("Attempt to take address of register or constant."));
2998 value_zero (type, not_lval);
3001 return address_of_variable (var, exp->elts[pc + 1].block);
3003 case OP_VAR_MSYM_VALUE:
3007 value *val = evaluate_var_msym_value (noside,
3008 exp->elts[pc + 1].objfile,
3009 exp->elts[pc + 2].msymbol);
3010 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3012 struct type *type = lookup_pointer_type (value_type (val));
3013 return value_zero (type, not_lval);
3016 return value_addr (val);
3020 tem = longest_to_int (exp->elts[pc + 2].longconst);
3021 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
3022 x = value_aggregate_elt (exp->elts[pc + 1].type,
3023 &exp->elts[pc + 3].string,
3026 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
3031 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
3032 default_case_after_eval:
3033 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3035 struct type *type = check_typedef (value_type (x));
3037 if (TYPE_IS_REFERENCE (type))
3038 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3040 else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
3041 return value_zero (lookup_pointer_type (value_type (x)),
3044 error (_("Attempt to take address of "
3045 "value not located in memory."));
3047 return value_addr (x);
3051 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
3052 When used in contexts where arrays will be coerced anyway, this is
3053 equivalent to `evaluate_subexp' but much faster because it avoids
3054 actually fetching array contents (perhaps obsolete now that we have
3057 Note that we currently only do the coercion for C expressions, where
3058 arrays are zero based and the coercion is correct. For other languages,
3059 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
3060 to decide if coercion is appropriate. */
3063 evaluate_subexp_with_coercion (struct expression *exp,
3064 int *pos, enum noside noside)
3073 op = exp->elts[pc].opcode;
3078 var = exp->elts[pc + 2].symbol;
3079 type = check_typedef (SYMBOL_TYPE (var));
3080 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
3081 && !TYPE_VECTOR (type)
3082 && CAST_IS_CONVERSION (exp->language_defn))
3085 val = address_of_variable (var, exp->elts[pc + 1].block);
3086 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3092 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
3096 /* Evaluate a subexpression of EXP, at index *POS,
3097 and return a value for the size of that subexpression.
3098 Advance *POS over the subexpression. If NOSIDE is EVAL_NORMAL
3099 we allow side-effects on the operand if its type is a variable
3102 static struct value *
3103 evaluate_subexp_for_sizeof (struct expression *exp, int *pos,
3106 /* FIXME: This should be size_t. */
3107 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
3114 op = exp->elts[pc].opcode;
3118 /* This case is handled specially
3119 so that we avoid creating a value for the result type.
3120 If the result type is very big, it's desirable not to
3121 create a value unnecessarily. */
3124 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3125 type = check_typedef (value_type (val));
3126 if (TYPE_CODE (type) != TYPE_CODE_PTR
3127 && !TYPE_IS_REFERENCE (type)
3128 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
3129 error (_("Attempt to take contents of a non-pointer value."));
3130 type = TYPE_TARGET_TYPE (type);
3131 if (is_dynamic_type (type))
3132 type = value_type (value_ind (val));
3133 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3137 type = exp->elts[pc + 1].type;
3140 case UNOP_MEMVAL_TYPE:
3142 val = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3143 type = value_type (val);
3147 type = SYMBOL_TYPE (exp->elts[pc + 2].symbol);
3148 if (is_dynamic_type (type))
3150 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3151 type = value_type (val);
3152 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
3153 && is_dynamic_type (TYPE_INDEX_TYPE (type))
3154 && TYPE_HIGH_BOUND_UNDEFINED (TYPE_INDEX_TYPE (type)))
3155 return allocate_optimized_out_value (size_type);
3161 case OP_VAR_MSYM_VALUE:
3165 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
3166 value *val = evaluate_var_msym_value (noside,
3167 exp->elts[pc + 1].objfile,
3170 type = value_type (val);
3171 if (TYPE_CODE (type) == TYPE_CODE_ERROR)
3172 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
3174 return value_from_longest (size_type, TYPE_LENGTH (type));
3178 /* Deal with the special case if NOSIDE is EVAL_NORMAL and the resulting
3179 type of the subscript is a variable length array type. In this case we
3180 must re-evaluate the right hand side of the subcription to allow
3182 case BINOP_SUBSCRIPT:
3183 if (noside == EVAL_NORMAL)
3185 int pc = (*pos) + 1;
3187 val = evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
3188 type = check_typedef (value_type (val));
3189 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3191 type = check_typedef (TYPE_TARGET_TYPE (type));
3192 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3194 type = TYPE_INDEX_TYPE (type);
3195 /* Only re-evaluate the right hand side if the resulting type
3196 is a variable length type. */
3197 if (TYPE_RANGE_DATA (type)->flag_bound_evaluated)
3199 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3200 return value_from_longest
3201 (size_type, (LONGEST) TYPE_LENGTH (value_type (val)));
3210 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3211 type = value_type (val);
3215 /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof:
3216 "When applied to a reference or a reference type, the result is
3217 the size of the referenced type." */
3218 type = check_typedef (type);
3219 if (exp->language_defn->la_language == language_cplus
3220 && (TYPE_IS_REFERENCE (type)))
3221 type = check_typedef (TYPE_TARGET_TYPE (type));
3222 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3225 /* Evaluate a subexpression of EXP, at index *POS, and return a value
3226 for that subexpression cast to TO_TYPE. Advance *POS over the
3230 evaluate_subexp_for_cast (expression *exp, int *pos,
3232 struct type *to_type)
3236 /* Don't let symbols be evaluated with evaluate_subexp because that
3237 throws an "unknown type" error for no-debug data symbols.
3238 Instead, we want the cast to reinterpret the symbol. */
3239 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE
3240 || exp->elts[pc].opcode == OP_VAR_VALUE)
3245 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE)
3247 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3248 return value_zero (to_type, not_lval);
3250 val = evaluate_var_msym_value (noside,
3251 exp->elts[pc + 1].objfile,
3252 exp->elts[pc + 2].msymbol);
3255 val = evaluate_var_value (noside,
3256 exp->elts[pc + 1].block,
3257 exp->elts[pc + 2].symbol);
3259 if (noside == EVAL_SKIP)
3260 return eval_skip_value (exp);
3262 val = value_cast (to_type, val);
3264 /* Don't allow e.g. '&(int)var_with_no_debug_info'. */
3265 if (VALUE_LVAL (val) == lval_memory)
3267 if (value_lazy (val))
3268 value_fetch_lazy (val);
3269 VALUE_LVAL (val) = not_lval;
3274 value *val = evaluate_subexp (to_type, exp, pos, noside);
3275 if (noside == EVAL_SKIP)
3276 return eval_skip_value (exp);
3277 return value_cast (to_type, val);
3280 /* Parse a type expression in the string [P..P+LENGTH). */
3283 parse_and_eval_type (char *p, int length)
3285 char *tmp = (char *) alloca (length + 4);
3288 memcpy (tmp + 1, p, length);
3289 tmp[length + 1] = ')';
3290 tmp[length + 2] = '0';
3291 tmp[length + 3] = '\0';
3292 expression_up expr = parse_expression (tmp);
3293 if (expr->elts[0].opcode != UNOP_CAST)
3294 error (_("Internal error in eval_type."));
3295 return expr->elts[1].type;
3299 calc_f77_array_dims (struct type *array_type)
3302 struct type *tmp_type;
3304 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
3305 error (_("Can't get dimensions for a non-array type"));
3307 tmp_type = array_type;
3309 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
3311 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)