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 TYPE_NFIELDS (type) = num_types;
687 TYPE_FIELDS (type) = (struct field *)
688 TYPE_ZALLOC (type, sizeof (struct field) * num_types);
690 while (num_types-- > 0)
691 TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
694 fake_method::~fake_method ()
696 xfree (TYPE_FIELDS (&m_type));
699 /* Helper for evaluating an OP_VAR_VALUE. */
702 evaluate_var_value (enum noside noside, const block *blk, symbol *var)
704 /* JYG: We used to just return value_zero of the symbol type if
705 we're asked to avoid side effects. Otherwise we return
706 value_of_variable (...). However I'm not sure if
707 value_of_variable () has any side effect. We need a full value
708 object returned here for whatis_exp () to call evaluate_type ()
709 and then pass the full value to value_rtti_target_type () if we
710 are dealing with a pointer or reference to a base class and print
713 struct value *ret = NULL;
717 ret = value_of_variable (var, blk);
720 CATCH (except, RETURN_MASK_ERROR)
722 if (noside != EVAL_AVOID_SIDE_EFFECTS)
723 throw_exception (except);
725 ret = value_zero (SYMBOL_TYPE (var), not_lval);
732 /* Helper for evaluating an OP_VAR_MSYM_VALUE. */
735 evaluate_var_msym_value (enum noside noside,
736 struct objfile *objfile, minimal_symbol *msymbol)
739 type *the_type = find_minsym_type_and_address (msymbol, objfile, &address);
741 if (noside == EVAL_AVOID_SIDE_EFFECTS && !TYPE_GNU_IFUNC (the_type))
742 return value_zero (the_type, not_lval);
744 return value_at_lazy (the_type, address);
747 /* Helper for returning a value when handling EVAL_SKIP. */
750 eval_skip_value (expression *exp)
752 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
755 /* Evaluate a function call. The function to be called is in
756 ARGVEC[0] and the arguments passed to the function are in
757 ARGVEC[1..NARGS]. FUNCTION_NAME is the name of the function, if
758 known. DEFAULT_RETURN_TYPE is used as the function's return type
759 if the return type is unknown. */
762 eval_call (expression *exp, enum noside noside,
763 int nargs, value **argvec,
764 const char *function_name,
765 type *default_return_type)
767 if (argvec[0] == NULL)
768 error (_("Cannot evaluate function -- may be inlined"));
769 if (noside == EVAL_AVOID_SIDE_EFFECTS)
771 /* If the return type doesn't look like a function type,
772 call an error. This can happen if somebody tries to turn
773 a variable into a function call. */
775 type *ftype = value_type (argvec[0]);
777 if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
779 /* We don't know anything about what the internal
780 function might return, but we have to return
782 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
785 else if (TYPE_CODE (ftype) == TYPE_CODE_XMETHOD)
788 = result_type_of_xmethod (argvec[0], nargs, argvec + 1);
790 if (return_type == NULL)
791 error (_("Xmethod is missing return type."));
792 return value_zero (return_type, not_lval);
794 else if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
795 || TYPE_CODE (ftype) == TYPE_CODE_METHOD)
797 if (TYPE_GNU_IFUNC (ftype))
799 CORE_ADDR address = value_address (argvec[0]);
800 type *resolved_type = find_gnu_ifunc_target_type (address);
802 if (resolved_type != NULL)
803 ftype = resolved_type;
806 type *return_type = TYPE_TARGET_TYPE (ftype);
808 if (return_type == NULL)
809 return_type = default_return_type;
811 if (return_type == NULL)
812 error_call_unknown_return_type (function_name);
814 return allocate_value (return_type);
817 error (_("Expression of type other than "
818 "\"Function returning ...\" used as function"));
820 switch (TYPE_CODE (value_type (argvec[0])))
822 case TYPE_CODE_INTERNAL_FUNCTION:
823 return call_internal_function (exp->gdbarch, exp->language_defn,
824 argvec[0], nargs, argvec + 1);
825 case TYPE_CODE_XMETHOD:
826 return call_xmethod (argvec[0], nargs, argvec + 1);
828 return call_function_by_hand (argvec[0], default_return_type,
833 /* Helper for evaluating an OP_FUNCALL. */
836 evaluate_funcall (type *expect_type, expression *exp, int *pos,
844 symbol *function = NULL;
845 char *function_name = NULL;
846 const char *var_func_name = NULL;
851 exp_opcode op = exp->elts[*pos].opcode;
852 int nargs = longest_to_int (exp->elts[pc].longconst);
853 /* Allocate arg vector, including space for the function to be
854 called in argvec[0], a potential `this', and a terminating
856 value **argvec = (value **) alloca (sizeof (value *) * (nargs + 3));
857 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
859 /* First, evaluate the structure into arg2. */
862 if (op == STRUCTOP_MEMBER)
864 arg2 = evaluate_subexp_for_address (exp, pos, noside);
868 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
871 /* If the function is a virtual function, then the aggregate
872 value (providing the structure) plays its part by providing
873 the vtable. Otherwise, it is just along for the ride: call
874 the function directly. */
876 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
878 type *a1_type = check_typedef (value_type (arg1));
879 if (noside == EVAL_SKIP)
880 tem = 1; /* Set it to the right arg index so that all
881 arguments can also be skipped. */
882 else if (TYPE_CODE (a1_type) == TYPE_CODE_METHODPTR)
884 if (noside == EVAL_AVOID_SIDE_EFFECTS)
885 arg1 = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval);
887 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
889 /* Now, say which argument to start evaluating from. */
894 else if (TYPE_CODE (a1_type) == TYPE_CODE_MEMBERPTR)
896 struct type *type_ptr
897 = lookup_pointer_type (TYPE_SELF_TYPE (a1_type));
898 struct type *target_type_ptr
899 = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type));
901 /* Now, convert these values to an address. */
902 arg2 = value_cast (type_ptr, arg2);
904 long mem_offset = value_as_long (arg1);
906 arg1 = value_from_pointer (target_type_ptr,
907 value_as_long (arg2) + mem_offset);
908 arg1 = value_ind (arg1);
912 error (_("Non-pointer-to-member value used in pointer-to-member "
915 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
917 /* Hair for method invocations. */
921 /* First, evaluate the structure into arg2. */
923 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
924 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
926 if (op == STRUCTOP_STRUCT)
928 /* If v is a variable in a register, and the user types
929 v.method (), this will produce an error, because v has no
932 A possible way around this would be to allocate a copy of
933 the variable on the stack, copy in the contents, call the
934 function, and copy out the contents. I.e. convert this
935 from call by reference to call by copy-return (or
936 whatever it's called). However, this does not work
937 because it is not the same: the method being called could
938 stash a copy of the address, and then future uses through
939 that address (after the method returns) would be expected
940 to use the variable itself, not some copy of it. */
941 arg2 = evaluate_subexp_for_address (exp, pos, noside);
945 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
947 /* Check to see if the operator '->' has been overloaded.
948 If the operator has been overloaded replace arg2 with the
949 value returned by the custom operator and continue
951 while (unop_user_defined_p (op, arg2))
953 struct value *value = NULL;
956 value = value_x_unop (arg2, op, noside);
959 CATCH (except, RETURN_MASK_ERROR)
961 if (except.error == NOT_FOUND_ERROR)
964 throw_exception (except);
971 /* Now, say which argument to start evaluating from. */
974 else if (op == OP_SCOPE
975 && overload_resolution
976 && (exp->language_defn->la_language == language_cplus))
978 /* Unpack it locally so we can properly handle overload
984 local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
985 (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
986 struct type *type = exp->elts[pc2 + 1].type;
987 name = &exp->elts[pc2 + 3].string;
990 function_name = NULL;
991 if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
993 function = cp_lookup_symbol_namespace (TYPE_NAME (type),
995 get_selected_block (0),
997 if (function == NULL)
998 error (_("No symbol \"%s\" in namespace \"%s\"."),
999 name, TYPE_NAME (type));
1002 /* arg2 is left as NULL on purpose. */
1006 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1007 || TYPE_CODE (type) == TYPE_CODE_UNION);
1008 function_name = name;
1010 /* We need a properly typed value for method lookup. For
1011 static methods arg2 is otherwise unused. */
1012 arg2 = value_zero (type, lval_memory);
1017 else if (op == OP_ADL_FUNC)
1019 /* Save the function position and move pos so that the arguments
1020 can be evaluated. */
1026 func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst);
1027 (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1);
1031 /* Non-method function call. */
1035 /* If this is a C++ function wait until overload resolution. */
1036 if (op == OP_VAR_VALUE
1037 && overload_resolution
1038 && (exp->language_defn->la_language == language_cplus))
1040 (*pos) += 4; /* Skip the evaluation of the symbol. */
1045 if (op == OP_VAR_MSYM_VALUE)
1047 minimal_symbol *msym = exp->elts[*pos + 2].msymbol;
1048 var_func_name = MSYMBOL_PRINT_NAME (msym);
1050 else if (op == OP_VAR_VALUE)
1052 symbol *sym = exp->elts[*pos + 2].symbol;
1053 var_func_name = SYMBOL_PRINT_NAME (sym);
1056 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1057 type *type = value_type (argvec[0]);
1058 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1059 type = TYPE_TARGET_TYPE (type);
1060 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1062 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1064 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type,
1072 /* Evaluate arguments (if not already done, e.g., namespace::func()
1073 and overload-resolution is off). */
1074 for (; tem <= nargs; tem++)
1076 /* Ensure that array expressions are coerced into pointer
1078 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1081 /* Signal end of arglist. */
1084 if (noside == EVAL_SKIP)
1085 return eval_skip_value (exp);
1087 if (op == OP_ADL_FUNC)
1089 struct symbol *symp;
1092 int string_pc = save_pos1 + 3;
1094 /* Extract the function name. */
1095 name_len = longest_to_int (exp->elts[string_pc].longconst);
1096 func_name = (char *) alloca (name_len + 1);
1097 strcpy (func_name, &exp->elts[string_pc + 1].string);
1099 find_overload_match (&argvec[1], nargs, func_name,
1100 NON_METHOD, /* not method */
1101 NULL, NULL, /* pass NULL symbol since
1102 symbol is unknown */
1103 NULL, &symp, NULL, 0, noside);
1105 /* Now fix the expression being evaluated. */
1106 exp->elts[save_pos1 + 2].symbol = symp;
1107 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1110 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
1111 || (op == OP_SCOPE && function_name != NULL))
1113 int static_memfuncp;
1116 /* Method invocation: stuff "this" as first parameter. If the
1117 method turns out to be static we undo this below. */
1122 /* Name of method from expression. */
1123 tstr = &exp->elts[pc2 + 2].string;
1126 tstr = function_name;
1128 if (overload_resolution && (exp->language_defn->la_language
1131 /* Language is C++, do some overload resolution before
1133 struct value *valp = NULL;
1135 (void) find_overload_match (&argvec[1], nargs, tstr,
1136 METHOD, /* method */
1137 &arg2, /* the object */
1139 &static_memfuncp, 0, noside);
1141 if (op == OP_SCOPE && !static_memfuncp)
1143 /* For the time being, we don't handle this. */
1144 error (_("Call to overloaded function %s requires "
1148 argvec[1] = arg2; /* the ``this'' pointer */
1149 argvec[0] = valp; /* Use the method found after overload
1153 /* Non-C++ case -- or no overload resolution. */
1155 struct value *temp = arg2;
1157 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1159 op == STRUCTOP_STRUCT
1160 ? "structure" : "structure pointer");
1161 /* value_struct_elt updates temp with the correct value of
1162 the ``this'' pointer if necessary, so modify argvec[1] to
1163 reflect any ``this'' changes. */
1165 = value_from_longest (lookup_pointer_type(value_type (temp)),
1166 value_address (temp)
1167 + value_embedded_offset (temp));
1168 argvec[1] = arg2; /* the ``this'' pointer */
1171 /* Take out `this' if needed. */
1172 if (static_memfuncp)
1174 argvec[1] = argvec[0];
1179 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1181 /* Pointer to member. argvec[1] is already set up. */
1184 else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
1186 /* Non-member function being called. */
1187 /* fn: This can only be done for C++ functions. A C-style
1188 function in a C++ program, for instance, does not have the
1189 fields that are expected here. */
1191 if (overload_resolution && (exp->language_defn->la_language
1194 /* Language is C++, do some overload resolution before
1196 struct symbol *symp;
1199 /* If a scope has been specified disable ADL. */
1203 if (op == OP_VAR_VALUE)
1204 function = exp->elts[save_pos1+2].symbol;
1206 (void) find_overload_match (&argvec[1], nargs,
1207 NULL, /* no need for name */
1208 NON_METHOD, /* not method */
1209 NULL, function, /* the function */
1210 NULL, &symp, NULL, no_adl, noside);
1212 if (op == OP_VAR_VALUE)
1214 /* Now fix the expression being evaluated. */
1215 exp->elts[save_pos1+2].symbol = symp;
1216 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
1220 argvec[0] = value_of_variable (symp, get_selected_block (0));
1224 /* Not C++, or no overload resolution allowed. */
1225 /* Nothing to be done; argvec already correctly set up. */
1230 /* It is probably a C-style function. */
1231 /* Nothing to be done; argvec already correctly set up. */
1234 return eval_call (exp, noside, nargs, argvec, var_func_name, expect_type);
1238 evaluate_subexp_standard (struct type *expect_type,
1239 struct expression *exp, int *pos,
1243 int tem, tem2, tem3;
1245 struct value *arg1 = NULL;
1246 struct value *arg2 = NULL;
1250 struct value **argvec;
1254 struct type **arg_types;
1257 op = exp->elts[pc].opcode;
1262 tem = longest_to_int (exp->elts[pc + 2].longconst);
1263 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
1264 if (noside == EVAL_SKIP)
1265 return eval_skip_value (exp);
1266 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
1267 &exp->elts[pc + 3].string,
1268 expect_type, 0, noside);
1270 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
1275 return value_from_longest (exp->elts[pc + 1].type,
1276 exp->elts[pc + 2].longconst);
1280 return value_from_contents (exp->elts[pc + 1].type,
1281 exp->elts[pc + 2].floatconst);
1286 if (noside == EVAL_SKIP)
1287 return eval_skip_value (exp);
1290 symbol *var = exp->elts[pc + 2].symbol;
1291 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_ERROR)
1292 error_unknown_type (SYMBOL_PRINT_NAME (var));
1294 return evaluate_var_value (noside, exp->elts[pc + 1].block, var);
1297 case OP_VAR_MSYM_VALUE:
1301 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
1302 value *val = evaluate_var_msym_value (noside,
1303 exp->elts[pc + 1].objfile,
1306 type = value_type (val);
1307 if (TYPE_CODE (type) == TYPE_CODE_ERROR
1308 && (noside != EVAL_AVOID_SIDE_EFFECTS || pc != 0))
1309 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
1313 case OP_VAR_ENTRY_VALUE:
1315 if (noside == EVAL_SKIP)
1316 return eval_skip_value (exp);
1319 struct symbol *sym = exp->elts[pc + 1].symbol;
1320 struct frame_info *frame;
1322 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1323 return value_zero (SYMBOL_TYPE (sym), not_lval);
1325 if (SYMBOL_COMPUTED_OPS (sym) == NULL
1326 || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL)
1327 error (_("Symbol \"%s\" does not have any specific entry value"),
1328 SYMBOL_PRINT_NAME (sym));
1330 frame = get_selected_frame (NULL);
1331 return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
1334 case OP_FUNC_STATIC_VAR:
1335 tem = longest_to_int (exp->elts[pc + 1].longconst);
1336 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1337 if (noside == EVAL_SKIP)
1338 return eval_skip_value (exp);
1341 value *func = evaluate_subexp_standard (NULL, exp, pos, noside);
1342 CORE_ADDR addr = value_address (func);
1344 const block *blk = block_for_pc (addr);
1345 const char *var = &exp->elts[pc + 2].string;
1347 struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL);
1349 if (sym.symbol == NULL)
1350 error (_("No symbol \"%s\" in specified context."), var);
1352 return evaluate_var_value (noside, sym.block, sym.symbol);
1358 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
1362 const char *name = &exp->elts[pc + 2].string;
1366 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
1367 regno = user_reg_map_name_to_regnum (exp->gdbarch,
1368 name, strlen (name));
1370 error (_("Register $%s not available."), name);
1372 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
1373 a value with the appropriate register type. Unfortunately,
1374 we don't have easy access to the type of user registers.
1375 So for these registers, we fetch the register value regardless
1376 of the evaluation mode. */
1377 if (noside == EVAL_AVOID_SIDE_EFFECTS
1378 && regno < gdbarch_num_regs (exp->gdbarch)
1379 + gdbarch_num_pseudo_regs (exp->gdbarch))
1380 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
1382 val = value_of_register (regno, get_selected_frame (NULL));
1384 error (_("Value of register %s not available."), name);
1390 type = language_bool_type (exp->language_defn, exp->gdbarch);
1391 return value_from_longest (type, exp->elts[pc + 1].longconst);
1393 case OP_INTERNALVAR:
1395 return value_of_internalvar (exp->gdbarch,
1396 exp->elts[pc + 1].internalvar);
1399 tem = longest_to_int (exp->elts[pc + 1].longconst);
1400 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1401 if (noside == EVAL_SKIP)
1402 return eval_skip_value (exp);
1403 type = language_string_char_type (exp->language_defn, exp->gdbarch);
1404 return value_string (&exp->elts[pc + 2].string, tem, type);
1406 case OP_OBJC_NSSTRING: /* Objective C Foundation Class
1407 NSString constant. */
1408 tem = longest_to_int (exp->elts[pc + 1].longconst);
1409 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1410 if (noside == EVAL_SKIP)
1411 return eval_skip_value (exp);
1412 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
1416 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
1417 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
1418 nargs = tem3 - tem2 + 1;
1419 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
1421 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1422 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
1424 struct value *rec = allocate_value (expect_type);
1426 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
1427 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
1430 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1431 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
1433 struct type *range_type = TYPE_INDEX_TYPE (type);
1434 struct type *element_type = TYPE_TARGET_TYPE (type);
1435 struct value *array = allocate_value (expect_type);
1436 int element_size = TYPE_LENGTH (check_typedef (element_type));
1437 LONGEST low_bound, high_bound, index;
1439 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
1442 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
1445 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
1446 for (tem = nargs; --nargs >= 0;)
1448 struct value *element;
1451 element = evaluate_subexp (element_type, exp, pos, noside);
1452 if (value_type (element) != element_type)
1453 element = value_cast (element_type, element);
1456 int continue_pc = *pos;
1459 index = init_array_element (array, element, exp, pos, noside,
1460 low_bound, high_bound);
1465 if (index > high_bound)
1466 /* To avoid memory corruption. */
1467 error (_("Too many array elements"));
1468 memcpy (value_contents_raw (array)
1469 + (index - low_bound) * element_size,
1470 value_contents (element),
1478 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1479 && TYPE_CODE (type) == TYPE_CODE_SET)
1481 struct value *set = allocate_value (expect_type);
1482 gdb_byte *valaddr = value_contents_raw (set);
1483 struct type *element_type = TYPE_INDEX_TYPE (type);
1484 struct type *check_type = element_type;
1485 LONGEST low_bound, high_bound;
1487 /* Get targettype of elementtype. */
1488 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
1489 || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
1490 check_type = TYPE_TARGET_TYPE (check_type);
1492 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
1493 error (_("(power)set type with unknown size"));
1494 memset (valaddr, '\0', TYPE_LENGTH (type));
1495 for (tem = 0; tem < nargs; tem++)
1497 LONGEST range_low, range_high;
1498 struct type *range_low_type, *range_high_type;
1499 struct value *elem_val;
1501 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1502 range_low_type = range_high_type = value_type (elem_val);
1503 range_low = range_high = value_as_long (elem_val);
1505 /* Check types of elements to avoid mixture of elements from
1506 different types. Also check if type of element is "compatible"
1507 with element type of powerset. */
1508 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
1509 range_low_type = TYPE_TARGET_TYPE (range_low_type);
1510 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
1511 range_high_type = TYPE_TARGET_TYPE (range_high_type);
1512 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
1513 || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
1514 && (range_low_type != range_high_type)))
1515 /* different element modes. */
1516 error (_("POWERSET tuple elements of different mode"));
1517 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
1518 || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
1519 && range_low_type != check_type))
1520 error (_("incompatible POWERSET tuple elements"));
1521 if (range_low > range_high)
1523 warning (_("empty POWERSET tuple range"));
1526 if (range_low < low_bound || range_high > high_bound)
1527 error (_("POWERSET tuple element out of range"));
1528 range_low -= low_bound;
1529 range_high -= low_bound;
1530 for (; range_low <= range_high; range_low++)
1532 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
1534 if (gdbarch_bits_big_endian (exp->gdbarch))
1535 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
1536 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
1543 argvec = XALLOCAVEC (struct value *, nargs);
1544 for (tem = 0; tem < nargs; tem++)
1546 /* Ensure that array expressions are coerced into pointer
1548 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1550 if (noside == EVAL_SKIP)
1551 return eval_skip_value (exp);
1552 return value_array (tem2, tem3, argvec);
1556 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1558 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1560 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1562 if (noside == EVAL_SKIP)
1563 return eval_skip_value (exp);
1564 return value_slice (array, lowbound, upper - lowbound + 1);
1568 /* Skip third and second args to evaluate the first one. */
1569 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1570 if (value_logical_not (arg1))
1572 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1573 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1577 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1578 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1582 case OP_OBJC_SELECTOR:
1583 { /* Objective C @selector operator. */
1584 char *sel = &exp->elts[pc + 2].string;
1585 int len = longest_to_int (exp->elts[pc + 1].longconst);
1586 struct type *selector_type;
1588 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1589 if (noside == EVAL_SKIP)
1590 return eval_skip_value (exp);
1593 sel[len] = 0; /* Make sure it's terminated. */
1595 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1596 return value_from_longest (selector_type,
1597 lookup_child_selector (exp->gdbarch, sel));
1600 case OP_OBJC_MSGCALL:
1601 { /* Objective C message (method) call. */
1603 CORE_ADDR responds_selector = 0;
1604 CORE_ADDR method_selector = 0;
1606 CORE_ADDR selector = 0;
1608 int struct_return = 0;
1609 enum noside sub_no_side = EVAL_NORMAL;
1611 struct value *msg_send = NULL;
1612 struct value *msg_send_stret = NULL;
1613 int gnu_runtime = 0;
1615 struct value *target = NULL;
1616 struct value *method = NULL;
1617 struct value *called_method = NULL;
1619 struct type *selector_type = NULL;
1620 struct type *long_type;
1622 struct value *ret = NULL;
1625 selector = exp->elts[pc + 1].longconst;
1626 nargs = exp->elts[pc + 2].longconst;
1627 argvec = XALLOCAVEC (struct value *, nargs + 5);
1631 long_type = builtin_type (exp->gdbarch)->builtin_long;
1632 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1634 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1635 sub_no_side = EVAL_NORMAL;
1637 sub_no_side = noside;
1639 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1641 if (value_as_long (target) == 0)
1642 return value_from_longest (long_type, 0);
1644 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym)
1647 /* Find the method dispatch (Apple runtime) or method lookup
1648 (GNU runtime) function for Objective-C. These will be used
1649 to lookup the symbol information for the method. If we
1650 can't find any symbol information, then we'll use these to
1651 call the method, otherwise we can call the method
1652 directly. The msg_send_stret function is used in the special
1653 case of a method that returns a structure (Apple runtime
1657 struct type *type = selector_type;
1659 type = lookup_function_type (type);
1660 type = lookup_pointer_type (type);
1661 type = lookup_function_type (type);
1662 type = lookup_pointer_type (type);
1664 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1666 = find_function_in_inferior ("objc_msg_lookup", NULL);
1668 msg_send = value_from_pointer (type, value_as_address (msg_send));
1669 msg_send_stret = value_from_pointer (type,
1670 value_as_address (msg_send_stret));
1674 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1675 /* Special dispatcher for methods returning structs. */
1677 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1680 /* Verify the target object responds to this method. The
1681 standard top-level 'Object' class uses a different name for
1682 the verification method than the non-standard, but more
1683 often used, 'NSObject' class. Make sure we check for both. */
1686 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1687 if (responds_selector == 0)
1689 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1691 if (responds_selector == 0)
1692 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1695 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1696 if (method_selector == 0)
1698 = lookup_child_selector (exp->gdbarch, "methodFor:");
1700 if (method_selector == 0)
1701 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1703 /* Call the verification method, to make sure that the target
1704 class implements the desired method. */
1706 argvec[0] = msg_send;
1708 argvec[2] = value_from_longest (long_type, responds_selector);
1709 argvec[3] = value_from_longest (long_type, selector);
1712 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1715 /* Function objc_msg_lookup returns a pointer. */
1717 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1719 if (value_as_long (ret) == 0)
1720 error (_("Target does not respond to this message selector."));
1722 /* Call "methodForSelector:" method, to get the address of a
1723 function method that implements this selector for this
1724 class. If we can find a symbol at that address, then we
1725 know the return type, parameter types etc. (that's a good
1728 argvec[0] = msg_send;
1730 argvec[2] = value_from_longest (long_type, method_selector);
1731 argvec[3] = value_from_longest (long_type, selector);
1734 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1738 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1741 /* ret should now be the selector. */
1743 addr = value_as_long (ret);
1746 struct symbol *sym = NULL;
1748 /* The address might point to a function descriptor;
1749 resolve it to the actual code address instead. */
1750 addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
1751 current_top_target ());
1753 /* Is it a high_level symbol? */
1754 sym = find_pc_function (addr);
1756 method = value_of_variable (sym, 0);
1759 /* If we found a method with symbol information, check to see
1760 if it returns a struct. Otherwise assume it doesn't. */
1765 struct type *val_type;
1767 funaddr = find_function_addr (method, &val_type);
1769 block_for_pc (funaddr);
1771 val_type = check_typedef (val_type);
1773 if ((val_type == NULL)
1774 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1776 if (expect_type != NULL)
1777 val_type = expect_type;
1780 struct_return = using_struct_return (exp->gdbarch, method,
1783 else if (expect_type != NULL)
1785 struct_return = using_struct_return (exp->gdbarch, NULL,
1786 check_typedef (expect_type));
1789 /* Found a function symbol. Now we will substitute its
1790 value in place of the message dispatcher (obj_msgSend),
1791 so that we call the method directly instead of thru
1792 the dispatcher. The main reason for doing this is that
1793 we can now evaluate the return value and parameter values
1794 according to their known data types, in case we need to
1795 do things like promotion, dereferencing, special handling
1796 of structs and doubles, etc.
1798 We want to use the type signature of 'method', but still
1799 jump to objc_msgSend() or objc_msgSend_stret() to better
1800 mimic the behavior of the runtime. */
1804 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1805 error (_("method address has symbol information "
1806 "with non-function type; skipping"));
1808 /* Create a function pointer of the appropriate type, and
1809 replace its value with the value of msg_send or
1810 msg_send_stret. We must use a pointer here, as
1811 msg_send and msg_send_stret are of pointer type, and
1812 the representation may be different on systems that use
1813 function descriptors. */
1816 = value_from_pointer (lookup_pointer_type (value_type (method)),
1817 value_as_address (msg_send_stret));
1820 = value_from_pointer (lookup_pointer_type (value_type (method)),
1821 value_as_address (msg_send));
1826 called_method = msg_send_stret;
1828 called_method = msg_send;
1831 if (noside == EVAL_SKIP)
1832 return eval_skip_value (exp);
1834 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1836 /* If the return type doesn't look like a function type,
1837 call an error. This can happen if somebody tries to
1838 turn a variable into a function call. This is here
1839 because people often want to call, eg, strcmp, which
1840 gdb doesn't know is a function. If gdb isn't asked for
1841 it's opinion (ie. through "whatis"), it won't offer
1844 struct type *type = value_type (called_method);
1846 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1847 type = TYPE_TARGET_TYPE (type);
1848 type = TYPE_TARGET_TYPE (type);
1852 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1853 return allocate_value (expect_type);
1855 return allocate_value (type);
1858 error (_("Expression of type other than "
1859 "\"method returning ...\" used as a method"));
1862 /* Now depending on whether we found a symbol for the method,
1863 we will either call the runtime dispatcher or the method
1866 argvec[0] = called_method;
1868 argvec[2] = value_from_longest (long_type, selector);
1869 /* User-supplied arguments. */
1870 for (tem = 0; tem < nargs; tem++)
1871 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1872 argvec[tem + 3] = 0;
1874 if (gnu_runtime && (method != NULL))
1876 /* Function objc_msg_lookup returns a pointer. */
1877 deprecated_set_value_type (argvec[0],
1878 lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
1880 = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1883 ret = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1889 return evaluate_funcall (expect_type, exp, pos, noside);
1891 case OP_F77_UNDETERMINED_ARGLIST:
1893 /* Remember that in F77, functions, substring ops and
1894 array subscript operations cannot be disambiguated
1895 at parse time. We have made all array subscript operations,
1896 substring operations as well as function calls come here
1897 and we now have to discover what the heck this thing actually was.
1898 If it is a function, we process just as if we got an OP_FUNCALL. */
1900 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1903 /* First determine the type code we are dealing with. */
1904 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1905 type = check_typedef (value_type (arg1));
1906 code = TYPE_CODE (type);
1908 if (code == TYPE_CODE_PTR)
1910 /* Fortran always passes variable to subroutines as pointer.
1911 So we need to look into its target type to see if it is
1912 array, string or function. If it is, we need to switch
1913 to the target value the original one points to. */
1914 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1916 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1917 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1918 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1920 arg1 = value_ind (arg1);
1921 type = check_typedef (value_type (arg1));
1922 code = TYPE_CODE (type);
1928 case TYPE_CODE_ARRAY:
1929 if (exp->elts[*pos].opcode == OP_RANGE)
1930 return value_f90_subarray (arg1, exp, pos, noside);
1932 goto multi_f77_subscript;
1934 case TYPE_CODE_STRING:
1935 if (exp->elts[*pos].opcode == OP_RANGE)
1936 return value_f90_subarray (arg1, exp, pos, noside);
1939 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1940 return value_subscript (arg1, value_as_long (arg2));
1944 case TYPE_CODE_FUNC:
1945 /* It's a function call. */
1946 /* Allocate arg vector, including space for the function to be
1947 called in argvec[0] and a terminating NULL. */
1948 argvec = (struct value **)
1949 alloca (sizeof (struct value *) * (nargs + 2));
1952 for (; tem <= nargs; tem++)
1953 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1954 argvec[tem] = 0; /* signal end of arglist */
1955 if (noside == EVAL_SKIP)
1956 return eval_skip_value (exp);
1957 return eval_call (exp, noside, nargs, argvec, NULL, expect_type);
1960 error (_("Cannot perform substring on this type"));
1964 /* We have a complex number, There should be 2 floating
1965 point numbers that compose it. */
1967 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1968 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1970 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1972 case STRUCTOP_STRUCT:
1973 tem = longest_to_int (exp->elts[pc + 1].longconst);
1974 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1975 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1976 if (noside == EVAL_SKIP)
1977 return eval_skip_value (exp);
1978 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
1980 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1981 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
1985 tem = longest_to_int (exp->elts[pc + 1].longconst);
1986 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1987 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1988 if (noside == EVAL_SKIP)
1989 return eval_skip_value (exp);
1991 /* Check to see if operator '->' has been overloaded. If so replace
1992 arg1 with the value returned by evaluating operator->(). */
1993 while (unop_user_defined_p (op, arg1))
1995 struct value *value = NULL;
1998 value = value_x_unop (arg1, op, noside);
2001 CATCH (except, RETURN_MASK_ERROR)
2003 if (except.error == NOT_FOUND_ERROR)
2006 throw_exception (except);
2013 /* JYG: if print object is on we need to replace the base type
2014 with rtti type in order to continue on with successful
2015 lookup of member / method only available in the rtti type. */
2017 struct type *type = value_type (arg1);
2018 struct type *real_type;
2019 int full, using_enc;
2021 struct value_print_options opts;
2023 get_user_print_options (&opts);
2024 if (opts.objectprint && TYPE_TARGET_TYPE(type)
2025 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
2027 real_type = value_rtti_indirect_type (arg1, &full, &top,
2030 arg1 = value_cast (real_type, arg1);
2034 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
2035 NULL, "structure pointer");
2036 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2037 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
2040 case STRUCTOP_MEMBER:
2042 if (op == STRUCTOP_MEMBER)
2043 arg1 = evaluate_subexp_for_address (exp, pos, noside);
2045 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2047 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2049 if (noside == EVAL_SKIP)
2050 return eval_skip_value (exp);
2052 type = check_typedef (value_type (arg2));
2053 switch (TYPE_CODE (type))
2055 case TYPE_CODE_METHODPTR:
2056 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2057 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
2060 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
2061 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
2062 return value_ind (arg2);
2065 case TYPE_CODE_MEMBERPTR:
2066 /* Now, convert these values to an address. */
2067 arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)),
2070 mem_offset = value_as_long (arg2);
2072 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2073 value_as_long (arg1) + mem_offset);
2074 return value_ind (arg3);
2077 error (_("non-pointer-to-member value used "
2078 "in pointer-to-member construct"));
2083 type_instance_flags flags
2084 = (type_instance_flag_value) longest_to_int (exp->elts[pc + 1].longconst);
2085 nargs = longest_to_int (exp->elts[pc + 2].longconst);
2086 arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
2087 for (ix = 0; ix < nargs; ++ix)
2088 arg_types[ix] = exp->elts[pc + 2 + ix + 1].type;
2090 fake_method expect_type (flags, nargs, arg_types);
2091 *(pos) += 4 + nargs;
2092 return evaluate_subexp_standard (expect_type.type (), exp, pos, noside);
2096 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2097 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2098 if (noside == EVAL_SKIP)
2099 return eval_skip_value (exp);
2100 if (binop_user_defined_p (op, arg1, arg2))
2101 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2103 return value_concat (arg1, arg2);
2106 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2107 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2109 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2111 if (binop_user_defined_p (op, arg1, arg2))
2112 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2114 return value_assign (arg1, arg2);
2116 case BINOP_ASSIGN_MODIFY:
2118 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2119 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2120 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2122 op = exp->elts[pc + 1].opcode;
2123 if (binop_user_defined_p (op, arg1, arg2))
2124 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
2125 else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn,
2127 && is_integral_type (value_type (arg2)))
2128 arg2 = value_ptradd (arg1, value_as_long (arg2));
2129 else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn,
2131 && is_integral_type (value_type (arg2)))
2132 arg2 = value_ptradd (arg1, - value_as_long (arg2));
2135 struct value *tmp = arg1;
2137 /* For shift and integer exponentiation operations,
2138 only promote the first argument. */
2139 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2140 && is_integral_type (value_type (arg2)))
2141 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
2143 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2145 arg2 = value_binop (tmp, arg2, op);
2147 return value_assign (arg1, arg2);
2150 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2151 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2152 if (noside == EVAL_SKIP)
2153 return eval_skip_value (exp);
2154 if (binop_user_defined_p (op, arg1, arg2))
2155 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2156 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2157 && is_integral_type (value_type (arg2)))
2158 return value_ptradd (arg1, value_as_long (arg2));
2159 else if (ptrmath_type_p (exp->language_defn, value_type (arg2))
2160 && is_integral_type (value_type (arg1)))
2161 return value_ptradd (arg2, value_as_long (arg1));
2164 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2165 return value_binop (arg1, arg2, BINOP_ADD);
2169 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2170 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2171 if (noside == EVAL_SKIP)
2172 return eval_skip_value (exp);
2173 if (binop_user_defined_p (op, arg1, arg2))
2174 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2175 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2176 && ptrmath_type_p (exp->language_defn, value_type (arg2)))
2178 /* FIXME -- should be ptrdiff_t */
2179 type = builtin_type (exp->gdbarch)->builtin_long;
2180 return value_from_longest (type, value_ptrdiff (arg1, arg2));
2182 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2183 && is_integral_type (value_type (arg2)))
2184 return value_ptradd (arg1, - value_as_long (arg2));
2187 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2188 return value_binop (arg1, arg2, BINOP_SUB);
2199 case BINOP_BITWISE_AND:
2200 case BINOP_BITWISE_IOR:
2201 case BINOP_BITWISE_XOR:
2202 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2203 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2204 if (noside == EVAL_SKIP)
2205 return eval_skip_value (exp);
2206 if (binop_user_defined_p (op, arg1, arg2))
2207 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2210 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2211 fudge arg2 to avoid division-by-zero, the caller is
2212 (theoretically) only looking for the type of the result. */
2213 if (noside == EVAL_AVOID_SIDE_EFFECTS
2214 /* ??? Do we really want to test for BINOP_MOD here?
2215 The implementation of value_binop gives it a well-defined
2218 || op == BINOP_INTDIV
2221 && value_logical_not (arg2))
2223 struct value *v_one, *retval;
2225 v_one = value_one (value_type (arg2));
2226 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
2227 retval = value_binop (arg1, v_one, op);
2232 /* For shift and integer exponentiation operations,
2233 only promote the first argument. */
2234 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2235 && is_integral_type (value_type (arg2)))
2236 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2238 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2240 return value_binop (arg1, arg2, op);
2244 case BINOP_SUBSCRIPT:
2245 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2246 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2247 if (noside == EVAL_SKIP)
2248 return eval_skip_value (exp);
2249 if (binop_user_defined_p (op, arg1, arg2))
2250 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2253 /* If the user attempts to subscript something that is not an
2254 array or pointer type (like a plain int variable for example),
2255 then report this as an error. */
2257 arg1 = coerce_ref (arg1);
2258 type = check_typedef (value_type (arg1));
2259 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
2260 && TYPE_CODE (type) != TYPE_CODE_PTR)
2262 if (TYPE_NAME (type))
2263 error (_("cannot subscript something of type `%s'"),
2266 error (_("cannot subscript requested type"));
2269 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2270 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
2272 return value_subscript (arg1, value_as_long (arg2));
2274 case MULTI_SUBSCRIPT:
2276 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2277 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2280 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2281 /* FIXME: EVAL_SKIP handling may not be correct. */
2282 if (noside == EVAL_SKIP)
2286 return eval_skip_value (exp);
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));
2327 if (TYPE_NAME (type))
2328 error (_("cannot subscript something of type `%s'"),
2331 error (_("cannot subscript requested type"));
2337 multi_f77_subscript:
2339 LONGEST subscript_array[MAX_FORTRAN_DIMS];
2340 int ndimensions = 1, i;
2341 struct value *array = arg1;
2343 if (nargs > MAX_FORTRAN_DIMS)
2344 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
2346 ndimensions = calc_f77_array_dims (type);
2348 if (nargs != ndimensions)
2349 error (_("Wrong number of subscripts"));
2351 gdb_assert (nargs > 0);
2353 /* Now that we know we have a legal array subscript expression
2354 let us actually find out where this element exists in the array. */
2356 /* Take array indices left to right. */
2357 for (i = 0; i < nargs; i++)
2359 /* Evaluate each subscript; it must be a legal integer in F77. */
2360 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2362 /* Fill in the subscript array. */
2364 subscript_array[i] = value_as_long (arg2);
2367 /* Internal type of array is arranged right to left. */
2368 for (i = nargs; i > 0; i--)
2370 struct type *array_type = check_typedef (value_type (array));
2371 LONGEST index = subscript_array[i - 1];
2373 array = value_subscripted_rvalue (array, index,
2374 f77_get_lowerbound (array_type));
2380 case BINOP_LOGICAL_AND:
2381 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2382 if (noside == EVAL_SKIP)
2384 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2385 return eval_skip_value (exp);
2389 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2392 if (binop_user_defined_p (op, arg1, arg2))
2394 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2395 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2399 tem = value_logical_not (arg1);
2400 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2401 (tem ? EVAL_SKIP : noside));
2402 type = language_bool_type (exp->language_defn, exp->gdbarch);
2403 return value_from_longest (type,
2404 (LONGEST) (!tem && !value_logical_not (arg2)));
2407 case BINOP_LOGICAL_OR:
2408 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2409 if (noside == EVAL_SKIP)
2411 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2412 return eval_skip_value (exp);
2416 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2419 if (binop_user_defined_p (op, arg1, arg2))
2421 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2422 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2426 tem = value_logical_not (arg1);
2427 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2428 (!tem ? EVAL_SKIP : noside));
2429 type = language_bool_type (exp->language_defn, exp->gdbarch);
2430 return value_from_longest (type,
2431 (LONGEST) (!tem || !value_logical_not (arg2)));
2435 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2436 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2437 if (noside == EVAL_SKIP)
2438 return eval_skip_value (exp);
2439 if (binop_user_defined_p (op, arg1, arg2))
2441 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2445 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2446 tem = value_equal (arg1, arg2);
2447 type = language_bool_type (exp->language_defn, exp->gdbarch);
2448 return value_from_longest (type, (LONGEST) tem);
2451 case BINOP_NOTEQUAL:
2452 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2453 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2454 if (noside == EVAL_SKIP)
2455 return eval_skip_value (exp);
2456 if (binop_user_defined_p (op, arg1, arg2))
2458 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2462 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2463 tem = value_equal (arg1, arg2);
2464 type = language_bool_type (exp->language_defn, exp->gdbarch);
2465 return value_from_longest (type, (LONGEST) ! tem);
2469 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2470 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2471 if (noside == EVAL_SKIP)
2472 return eval_skip_value (exp);
2473 if (binop_user_defined_p (op, arg1, arg2))
2475 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2479 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2480 tem = value_less (arg1, arg2);
2481 type = language_bool_type (exp->language_defn, exp->gdbarch);
2482 return value_from_longest (type, (LONGEST) tem);
2486 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2487 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2488 if (noside == EVAL_SKIP)
2489 return eval_skip_value (exp);
2490 if (binop_user_defined_p (op, arg1, arg2))
2492 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2496 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2497 tem = value_less (arg2, arg1);
2498 type = language_bool_type (exp->language_defn, exp->gdbarch);
2499 return value_from_longest (type, (LONGEST) tem);
2503 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2504 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2505 if (noside == EVAL_SKIP)
2506 return eval_skip_value (exp);
2507 if (binop_user_defined_p (op, arg1, arg2))
2509 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2513 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2514 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2515 type = language_bool_type (exp->language_defn, exp->gdbarch);
2516 return value_from_longest (type, (LONGEST) tem);
2520 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2521 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2522 if (noside == EVAL_SKIP)
2523 return eval_skip_value (exp);
2524 if (binop_user_defined_p (op, arg1, arg2))
2526 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2530 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2531 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2532 type = language_bool_type (exp->language_defn, exp->gdbarch);
2533 return value_from_longest (type, (LONGEST) tem);
2537 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2538 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2539 if (noside == EVAL_SKIP)
2540 return eval_skip_value (exp);
2541 type = check_typedef (value_type (arg2));
2542 if (TYPE_CODE (type) != TYPE_CODE_INT
2543 && TYPE_CODE (type) != TYPE_CODE_ENUM)
2544 error (_("Non-integral right operand for \"@\" operator."));
2545 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2547 return allocate_repeat_value (value_type (arg1),
2548 longest_to_int (value_as_long (arg2)));
2551 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2554 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2555 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2558 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2559 if (noside == EVAL_SKIP)
2560 return eval_skip_value (exp);
2561 if (unop_user_defined_p (op, arg1))
2562 return value_x_unop (arg1, op, noside);
2565 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2566 return value_pos (arg1);
2570 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2571 if (noside == EVAL_SKIP)
2572 return eval_skip_value (exp);
2573 if (unop_user_defined_p (op, arg1))
2574 return value_x_unop (arg1, op, noside);
2577 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2578 return value_neg (arg1);
2581 case UNOP_COMPLEMENT:
2582 /* C++: check for and handle destructor names. */
2584 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2585 if (noside == EVAL_SKIP)
2586 return eval_skip_value (exp);
2587 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2588 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2591 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2592 return value_complement (arg1);
2595 case UNOP_LOGICAL_NOT:
2596 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2597 if (noside == EVAL_SKIP)
2598 return eval_skip_value (exp);
2599 if (unop_user_defined_p (op, arg1))
2600 return value_x_unop (arg1, op, noside);
2603 type = language_bool_type (exp->language_defn, exp->gdbarch);
2604 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2608 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2609 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2610 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2611 type = check_typedef (value_type (arg1));
2612 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2613 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2614 error (_("Attempt to dereference pointer "
2615 "to member without an object"));
2616 if (noside == EVAL_SKIP)
2617 return eval_skip_value (exp);
2618 if (unop_user_defined_p (op, arg1))
2619 return value_x_unop (arg1, op, noside);
2620 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2622 type = check_typedef (value_type (arg1));
2623 if (TYPE_CODE (type) == TYPE_CODE_PTR
2624 || TYPE_IS_REFERENCE (type)
2625 /* In C you can dereference an array to get the 1st elt. */
2626 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2628 return value_zero (TYPE_TARGET_TYPE (type),
2630 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2631 /* GDB allows dereferencing an int. */
2632 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2635 error (_("Attempt to take contents of a non-pointer value."));
2638 /* Allow * on an integer so we can cast it to whatever we want.
2639 This returns an int, which seems like the most C-like thing to
2640 do. "long long" variables are rare enough that
2641 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2642 if (TYPE_CODE (type) == TYPE_CODE_INT)
2643 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2644 (CORE_ADDR) value_as_address (arg1));
2645 return value_ind (arg1);
2648 /* C++: check for and handle pointer to members. */
2650 if (noside == EVAL_SKIP)
2652 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2653 return eval_skip_value (exp);
2657 struct value *retvalp = evaluate_subexp_for_address (exp, pos,
2664 if (noside == EVAL_SKIP)
2666 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2667 return eval_skip_value (exp);
2669 return evaluate_subexp_for_sizeof (exp, pos, noside);
2674 = value_type (evaluate_subexp (NULL_TYPE, exp, pos,
2675 EVAL_AVOID_SIDE_EFFECTS));
2676 /* FIXME: This should be size_t. */
2677 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
2678 ULONGEST align = type_align (type);
2680 error (_("could not determine alignment of type"));
2681 return value_from_longest (size_type, align);
2686 type = exp->elts[pc + 1].type;
2687 return evaluate_subexp_for_cast (exp, pos, noside, type);
2689 case UNOP_CAST_TYPE:
2690 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2691 type = value_type (arg1);
2692 return evaluate_subexp_for_cast (exp, pos, noside, type);
2694 case UNOP_DYNAMIC_CAST:
2695 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2696 type = value_type (arg1);
2697 arg1 = evaluate_subexp (type, exp, pos, noside);
2698 if (noside == EVAL_SKIP)
2699 return eval_skip_value (exp);
2700 return value_dynamic_cast (type, arg1);
2702 case UNOP_REINTERPRET_CAST:
2703 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2704 type = value_type (arg1);
2705 arg1 = evaluate_subexp (type, exp, pos, noside);
2706 if (noside == EVAL_SKIP)
2707 return eval_skip_value (exp);
2708 return value_reinterpret_cast (type, arg1);
2712 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2713 if (noside == EVAL_SKIP)
2714 return eval_skip_value (exp);
2715 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2716 return value_zero (exp->elts[pc + 1].type, lval_memory);
2718 return value_at_lazy (exp->elts[pc + 1].type,
2719 value_as_address (arg1));
2721 case UNOP_MEMVAL_TYPE:
2722 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2723 type = value_type (arg1);
2724 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2725 if (noside == EVAL_SKIP)
2726 return eval_skip_value (exp);
2727 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2728 return value_zero (type, lval_memory);
2730 return value_at_lazy (type, value_as_address (arg1));
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)
2843 return eval_skip_value (exp);
2844 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2845 return allocate_value (exp->elts[pc + 1].type);
2847 error (_("Attempt to use a type name as an expression"));
2851 if (noside == EVAL_SKIP)
2853 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2854 return eval_skip_value (exp);
2856 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2858 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2859 struct value *result;
2861 result = evaluate_subexp (NULL_TYPE, exp, pos,
2862 EVAL_AVOID_SIDE_EFFECTS);
2864 /* 'decltype' has special semantics for lvalues. */
2865 if (op == OP_DECLTYPE
2866 && (sub_op == BINOP_SUBSCRIPT
2867 || sub_op == STRUCTOP_MEMBER
2868 || sub_op == STRUCTOP_MPTR
2869 || sub_op == UNOP_IND
2870 || sub_op == STRUCTOP_STRUCT
2871 || sub_op == STRUCTOP_PTR
2872 || sub_op == OP_SCOPE))
2874 struct type *type = value_type (result);
2876 if (!TYPE_IS_REFERENCE (type))
2878 type = lookup_lvalue_reference_type (type);
2879 result = allocate_value (type);
2886 error (_("Attempt to use a type as an expression"));
2890 struct value *result;
2891 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2893 if (sub_op == OP_TYPE || sub_op == OP_DECLTYPE || sub_op == OP_TYPEOF)
2894 result = evaluate_subexp (NULL_TYPE, exp, pos,
2895 EVAL_AVOID_SIDE_EFFECTS);
2897 result = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2899 if (noside != EVAL_NORMAL)
2900 return allocate_value (cplus_typeid_type (exp->gdbarch));
2902 return cplus_typeid (result);
2906 /* Removing this case and compiling with gcc -Wall reveals that
2907 a lot of cases are hitting this case. Some of these should
2908 probably be removed from expression.h; others are legitimate
2909 expressions which are (apparently) not fully implemented.
2911 If there are any cases landing here which mean a user error,
2912 then they should be separate cases, with more descriptive
2915 error (_("GDB does not (yet) know how to "
2916 "evaluate that kind of expression"));
2919 gdb_assert_not_reached ("missed return?");
2922 /* Evaluate a subexpression of EXP, at index *POS,
2923 and return the address of that subexpression.
2924 Advance *POS over the subexpression.
2925 If the subexpression isn't an lvalue, get an error.
2926 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2927 then only the type of the result need be correct. */
2929 static struct value *
2930 evaluate_subexp_for_address (struct expression *exp, int *pos,
2940 op = exp->elts[pc].opcode;
2946 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2948 /* We can't optimize out "&*" if there's a user-defined operator*. */
2949 if (unop_user_defined_p (op, x))
2951 x = value_x_unop (x, op, noside);
2952 goto default_case_after_eval;
2955 return coerce_array (x);
2959 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2960 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2962 case UNOP_MEMVAL_TYPE:
2967 x = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2968 type = value_type (x);
2969 return value_cast (lookup_pointer_type (type),
2970 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2974 var = exp->elts[pc + 2].symbol;
2976 /* C++: The "address" of a reference should yield the address
2977 * of the object pointed to. Let value_addr() deal with it. */
2978 if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var)))
2982 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2985 lookup_pointer_type (SYMBOL_TYPE (var));
2986 enum address_class sym_class = SYMBOL_CLASS (var);
2988 if (sym_class == LOC_CONST
2989 || sym_class == LOC_CONST_BYTES
2990 || sym_class == LOC_REGISTER)
2991 error (_("Attempt to take address of register or constant."));
2994 value_zero (type, not_lval);
2997 return address_of_variable (var, exp->elts[pc + 1].block);
2999 case OP_VAR_MSYM_VALUE:
3003 value *val = evaluate_var_msym_value (noside,
3004 exp->elts[pc + 1].objfile,
3005 exp->elts[pc + 2].msymbol);
3006 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3008 struct type *type = lookup_pointer_type (value_type (val));
3009 return value_zero (type, not_lval);
3012 return value_addr (val);
3016 tem = longest_to_int (exp->elts[pc + 2].longconst);
3017 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
3018 x = value_aggregate_elt (exp->elts[pc + 1].type,
3019 &exp->elts[pc + 3].string,
3022 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
3027 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
3028 default_case_after_eval:
3029 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3031 struct type *type = check_typedef (value_type (x));
3033 if (TYPE_IS_REFERENCE (type))
3034 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3036 else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
3037 return value_zero (lookup_pointer_type (value_type (x)),
3040 error (_("Attempt to take address of "
3041 "value not located in memory."));
3043 return value_addr (x);
3047 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
3048 When used in contexts where arrays will be coerced anyway, this is
3049 equivalent to `evaluate_subexp' but much faster because it avoids
3050 actually fetching array contents (perhaps obsolete now that we have
3053 Note that we currently only do the coercion for C expressions, where
3054 arrays are zero based and the coercion is correct. For other languages,
3055 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
3056 to decide if coercion is appropriate. */
3059 evaluate_subexp_with_coercion (struct expression *exp,
3060 int *pos, enum noside noside)
3069 op = exp->elts[pc].opcode;
3074 var = exp->elts[pc + 2].symbol;
3075 type = check_typedef (SYMBOL_TYPE (var));
3076 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
3077 && !TYPE_VECTOR (type)
3078 && CAST_IS_CONVERSION (exp->language_defn))
3081 val = address_of_variable (var, exp->elts[pc + 1].block);
3082 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3088 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
3092 /* Evaluate a subexpression of EXP, at index *POS,
3093 and return a value for the size of that subexpression.
3094 Advance *POS over the subexpression. If NOSIDE is EVAL_NORMAL
3095 we allow side-effects on the operand if its type is a variable
3098 static struct value *
3099 evaluate_subexp_for_sizeof (struct expression *exp, int *pos,
3102 /* FIXME: This should be size_t. */
3103 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
3110 op = exp->elts[pc].opcode;
3114 /* This case is handled specially
3115 so that we avoid creating a value for the result type.
3116 If the result type is very big, it's desirable not to
3117 create a value unnecessarily. */
3120 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3121 type = check_typedef (value_type (val));
3122 if (TYPE_CODE (type) != TYPE_CODE_PTR
3123 && !TYPE_IS_REFERENCE (type)
3124 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
3125 error (_("Attempt to take contents of a non-pointer value."));
3126 type = TYPE_TARGET_TYPE (type);
3127 if (is_dynamic_type (type))
3128 type = value_type (value_ind (val));
3129 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3133 type = exp->elts[pc + 1].type;
3136 case UNOP_MEMVAL_TYPE:
3138 val = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3139 type = value_type (val);
3143 type = SYMBOL_TYPE (exp->elts[pc + 2].symbol);
3144 if (is_dynamic_type (type))
3146 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3147 type = value_type (val);
3153 case OP_VAR_MSYM_VALUE:
3157 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
3158 value *val = evaluate_var_msym_value (noside,
3159 exp->elts[pc + 1].objfile,
3162 type = value_type (val);
3163 if (TYPE_CODE (type) == TYPE_CODE_ERROR)
3164 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
3166 return value_from_longest (size_type, TYPE_LENGTH (type));
3170 /* Deal with the special case if NOSIDE is EVAL_NORMAL and the resulting
3171 type of the subscript is a variable length array type. In this case we
3172 must re-evaluate the right hand side of the subcription to allow
3174 case BINOP_SUBSCRIPT:
3175 if (noside == EVAL_NORMAL)
3177 int pc = (*pos) + 1;
3179 val = evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
3180 type = check_typedef (value_type (val));
3181 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3183 type = check_typedef (TYPE_TARGET_TYPE (type));
3184 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3186 type = TYPE_INDEX_TYPE (type);
3187 /* Only re-evaluate the right hand side if the resulting type
3188 is a variable length type. */
3189 if (TYPE_RANGE_DATA (type)->flag_bound_evaluated)
3191 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3192 return value_from_longest
3193 (size_type, (LONGEST) TYPE_LENGTH (value_type (val)));
3202 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3203 type = value_type (val);
3207 /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof:
3208 "When applied to a reference or a reference type, the result is
3209 the size of the referenced type." */
3210 type = check_typedef (type);
3211 if (exp->language_defn->la_language == language_cplus
3212 && (TYPE_IS_REFERENCE (type)))
3213 type = check_typedef (TYPE_TARGET_TYPE (type));
3214 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3217 /* Evaluate a subexpression of EXP, at index *POS, and return a value
3218 for that subexpression cast to TO_TYPE. Advance *POS over the
3222 evaluate_subexp_for_cast (expression *exp, int *pos,
3224 struct type *to_type)
3228 /* Don't let symbols be evaluated with evaluate_subexp because that
3229 throws an "unknown type" error for no-debug data symbols.
3230 Instead, we want the cast to reinterpret the symbol. */
3231 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE
3232 || exp->elts[pc].opcode == OP_VAR_VALUE)
3237 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE)
3239 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3240 return value_zero (to_type, not_lval);
3242 val = evaluate_var_msym_value (noside,
3243 exp->elts[pc + 1].objfile,
3244 exp->elts[pc + 2].msymbol);
3247 val = evaluate_var_value (noside,
3248 exp->elts[pc + 1].block,
3249 exp->elts[pc + 2].symbol);
3251 if (noside == EVAL_SKIP)
3252 return eval_skip_value (exp);
3254 val = value_cast (to_type, val);
3256 /* Don't allow e.g. '&(int)var_with_no_debug_info'. */
3257 if (VALUE_LVAL (val) == lval_memory)
3259 if (value_lazy (val))
3260 value_fetch_lazy (val);
3261 VALUE_LVAL (val) = not_lval;
3266 value *val = evaluate_subexp (to_type, exp, pos, noside);
3267 if (noside == EVAL_SKIP)
3268 return eval_skip_value (exp);
3269 return value_cast (to_type, val);
3272 /* Parse a type expression in the string [P..P+LENGTH). */
3275 parse_and_eval_type (char *p, int length)
3277 char *tmp = (char *) alloca (length + 4);
3280 memcpy (tmp + 1, p, length);
3281 tmp[length + 1] = ')';
3282 tmp[length + 2] = '0';
3283 tmp[length + 3] = '\0';
3284 expression_up expr = parse_expression (tmp);
3285 if (expr->elts[0].opcode != UNOP_CAST)
3286 error (_("Internal error in eval_type."));
3287 return expr->elts[1].type;
3291 calc_f77_array_dims (struct type *array_type)
3294 struct type *tmp_type;
3296 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
3297 error (_("Can't get dimensions for a non-array type"));
3299 tmp_type = array_type;
3301 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
3303 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)