1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
27 #include "gdbthread.h"
28 #include "language.h" /* For CAST_IS_CONVERSION. */
29 #include "f-lang.h" /* For array bound stuff. */
32 #include "objc-lang.h"
34 #include "parser-defs.h"
35 #include "cp-support.h"
38 #include "user-regs.h"
40 #include "gdb_obstack.h"
42 #include "typeprint.h"
45 /* This is defined in valops.c */
46 extern int overload_resolution;
48 /* Prototypes for local functions. */
50 static struct value *evaluate_subexp_for_sizeof (struct expression *, int *,
53 static struct value *evaluate_subexp_for_address (struct expression *,
56 static value *evaluate_subexp_for_cast (expression *exp, int *pos,
60 static struct value *evaluate_struct_tuple (struct value *,
61 struct expression *, int *,
64 static LONGEST init_array_element (struct value *, struct value *,
65 struct expression *, int *, enum noside,
69 evaluate_subexp (struct type *expect_type, struct expression *exp,
70 int *pos, enum noside noside)
72 struct cleanup *cleanups;
74 int cleanup_temps = 0;
76 if (*pos == 0 && target_has_execution
77 && exp->language_defn->la_language == language_cplus
78 && !thread_stack_temporaries_enabled_p (inferior_ptid))
80 cleanups = enable_thread_stack_temporaries (inferior_ptid);
84 retval = (*exp->language_defn->la_exp_desc->evaluate_exp)
85 (expect_type, exp, pos, noside);
89 if (value_in_thread_stack_temporaries (retval, inferior_ptid))
90 retval = value_non_lval (retval);
91 do_cleanups (cleanups);
97 /* Parse the string EXP as a C expression, evaluate it,
98 and return the result as a number. */
101 parse_and_eval_address (const char *exp)
103 expression_up expr = parse_expression (exp);
105 return value_as_address (evaluate_expression (expr.get ()));
108 /* Like parse_and_eval_address, but treats the value of the expression
109 as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
111 parse_and_eval_long (const char *exp)
113 expression_up expr = parse_expression (exp);
115 return value_as_long (evaluate_expression (expr.get ()));
119 parse_and_eval (const char *exp)
121 expression_up expr = parse_expression (exp);
123 return evaluate_expression (expr.get ());
126 /* Parse up to a comma (or to a closeparen)
127 in the string EXPP as an expression, evaluate it, and return the value.
128 EXPP is advanced to point to the comma. */
131 parse_to_comma_and_eval (const char **expp)
133 expression_up expr = parse_exp_1 (expp, 0, (struct block *) 0, 1);
135 return evaluate_expression (expr.get ());
138 /* Evaluate an expression in internal prefix form
139 such as is constructed by parse.y.
141 See expression.h for info on the format of an expression. */
144 evaluate_expression (struct expression *exp)
148 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
151 /* Evaluate an expression, avoiding all memory references
152 and getting a value whose type alone is correct. */
155 evaluate_type (struct expression *exp)
159 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
162 /* Evaluate a subexpression, avoiding all memory references and
163 getting a value whose type alone is correct. */
166 evaluate_subexpression_type (struct expression *exp, int subexp)
168 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
171 /* Find the current value of a watchpoint on EXP. Return the value in
172 *VALP and *RESULTP and the chain of intermediate and final values
173 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
176 If PRESERVE_ERRORS is true, then exceptions are passed through.
177 Otherwise, if PRESERVE_ERRORS is false, then if a memory error
178 occurs while evaluating the expression, *RESULTP will be set to
179 NULL. *RESULTP may be a lazy value, if the result could not be
180 read from memory. It is used to determine whether a value is
181 user-specified (we should watch the whole value) or intermediate
182 (we should watch only the bit used to locate the final value).
184 If the final value, or any intermediate value, could not be read
185 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
186 set to any referenced values. *VALP will never be a lazy value.
187 This is the value which we store in struct breakpoint.
189 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
190 value chain. The caller must free the values individually. If
191 VAL_CHAIN is NULL, all generated values will be left on the value
195 fetch_subexp_value (struct expression *exp, int *pc, struct value **valp,
196 struct value **resultp, struct value **val_chain,
199 struct value *mark, *new_mark, *result;
207 /* Evaluate the expression. */
208 mark = value_mark ();
213 result = evaluate_subexp (NULL_TYPE, exp, pc, EVAL_NORMAL);
215 CATCH (ex, RETURN_MASK_ALL)
217 /* Ignore memory errors if we want watchpoints pointing at
218 inaccessible memory to still be created; otherwise, throw the
219 error to some higher catcher. */
223 if (!preserve_errors)
226 throw_exception (ex);
232 new_mark = value_mark ();
233 if (mark == new_mark)
238 /* Make sure it's not lazy, so that after the target stops again we
239 have a non-lazy previous value to compare with. */
242 if (!value_lazy (result))
249 value_fetch_lazy (result);
252 CATCH (except, RETURN_MASK_ERROR)
261 /* Return the chain of intermediate values. We use this to
262 decide which addresses to watch. */
263 *val_chain = new_mark;
264 value_release_to_mark (mark);
268 /* Extract a field operation from an expression. If the subexpression
269 of EXP starting at *SUBEXP is not a structure dereference
270 operation, return NULL. Otherwise, return the name of the
271 dereferenced field, and advance *SUBEXP to point to the
272 subexpression of the left-hand-side of the dereference. This is
273 used when completing field names. */
276 extract_field_op (struct expression *exp, int *subexp)
281 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
282 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
284 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
285 result = &exp->elts[*subexp + 2].string;
286 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
290 /* This function evaluates brace-initializers (in C/C++) for
293 static struct value *
294 evaluate_struct_tuple (struct value *struct_val,
295 struct expression *exp,
296 int *pos, enum noside noside, int nargs)
298 struct type *struct_type = check_typedef (value_type (struct_val));
299 struct type *field_type;
304 struct value *val = NULL;
309 /* Skip static fields. */
310 while (fieldno < TYPE_NFIELDS (struct_type)
311 && field_is_static (&TYPE_FIELD (struct_type,
314 if (fieldno >= TYPE_NFIELDS (struct_type))
315 error (_("too many initializers"));
316 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
317 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
318 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
319 error (_("don't know which variant you want to set"));
321 /* Here, struct_type is the type of the inner struct,
322 while substruct_type is the type of the inner struct.
323 These are the same for normal structures, but a variant struct
324 contains anonymous union fields that contain substruct fields.
325 The value fieldno is the index of the top-level (normal or
326 anonymous union) field in struct_field, while the value
327 subfieldno is the index of the actual real (named inner) field
328 in substruct_type. */
330 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
332 val = evaluate_subexp (field_type, exp, pos, noside);
334 /* Now actually set the field in struct_val. */
336 /* Assign val to field fieldno. */
337 if (value_type (val) != field_type)
338 val = value_cast (field_type, val);
340 bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno);
341 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
342 addr = value_contents_writeable (struct_val) + bitpos / 8;
344 modify_field (struct_type, addr,
345 value_as_long (val), bitpos % 8, bitsize);
347 memcpy (addr, value_contents (val),
348 TYPE_LENGTH (value_type (val)));
354 /* Recursive helper function for setting elements of array tuples.
355 The target is ARRAY (which has bounds LOW_BOUND to HIGH_BOUND); the
356 element value is ELEMENT; EXP, POS and NOSIDE are as usual.
357 Evaluates index expresions and sets the specified element(s) of
358 ARRAY to ELEMENT. Returns last index value. */
361 init_array_element (struct value *array, struct value *element,
362 struct expression *exp, int *pos,
363 enum noside noside, LONGEST low_bound, LONGEST high_bound)
366 int element_size = TYPE_LENGTH (value_type (element));
368 if (exp->elts[*pos].opcode == BINOP_COMMA)
371 init_array_element (array, element, exp, pos, noside,
372 low_bound, high_bound);
373 return init_array_element (array, element,
374 exp, pos, noside, low_bound, high_bound);
378 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
379 if (index < low_bound || index > high_bound)
380 error (_("tuple index out of range"));
381 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
382 value_contents (element), element_size);
387 static struct value *
388 value_f90_subarray (struct value *array,
389 struct expression *exp, int *pos, enum noside noside)
392 LONGEST low_bound, high_bound;
393 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
394 enum range_type range_type
395 = (enum range_type) longest_to_int (exp->elts[pc].longconst);
399 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
400 low_bound = TYPE_LOW_BOUND (range);
402 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
404 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
405 high_bound = TYPE_HIGH_BOUND (range);
407 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
409 return value_slice (array, low_bound, high_bound - low_bound + 1);
413 /* Promote value ARG1 as appropriate before performing a unary operation
415 If the result is not appropriate for any particular language then it
416 needs to patch this function. */
419 unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
424 *arg1 = coerce_ref (*arg1);
425 type1 = check_typedef (value_type (*arg1));
427 if (is_integral_type (type1))
429 switch (language->la_language)
432 /* Perform integral promotion for ANSI C/C++.
433 If not appropropriate for any particular language
434 it needs to modify this function. */
436 struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
438 if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
439 *arg1 = value_cast (builtin_int, *arg1);
446 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
447 operation on those two operands.
448 If the result is not appropriate for any particular language then it
449 needs to patch this function. */
452 binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
453 struct value **arg1, struct value **arg2)
455 struct type *promoted_type = NULL;
459 *arg1 = coerce_ref (*arg1);
460 *arg2 = coerce_ref (*arg2);
462 type1 = check_typedef (value_type (*arg1));
463 type2 = check_typedef (value_type (*arg2));
465 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
466 && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
467 && !is_integral_type (type1))
468 || (TYPE_CODE (type2) != TYPE_CODE_FLT
469 && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
470 && !is_integral_type (type2)))
473 if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
474 || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
476 /* No promotion required. */
478 else if (TYPE_CODE (type1) == TYPE_CODE_FLT
479 || TYPE_CODE (type2) == TYPE_CODE_FLT)
481 switch (language->la_language)
487 case language_opencl:
488 /* No promotion required. */
492 /* For other languages the result type is unchanged from gdb
493 version 6.7 for backward compatibility.
494 If either arg was long double, make sure that value is also long
495 double. Otherwise use double. */
496 if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch)
497 || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
498 promoted_type = builtin_type (gdbarch)->builtin_long_double;
500 promoted_type = builtin_type (gdbarch)->builtin_double;
504 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
505 && TYPE_CODE (type2) == TYPE_CODE_BOOL)
507 /* No promotion required. */
510 /* Integral operations here. */
511 /* FIXME: Also mixed integral/booleans, with result an integer. */
513 const struct builtin_type *builtin = builtin_type (gdbarch);
514 unsigned int promoted_len1 = TYPE_LENGTH (type1);
515 unsigned int promoted_len2 = TYPE_LENGTH (type2);
516 int is_unsigned1 = TYPE_UNSIGNED (type1);
517 int is_unsigned2 = TYPE_UNSIGNED (type2);
518 unsigned int result_len;
519 int unsigned_operation;
521 /* Determine type length and signedness after promotion for
523 if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int))
526 promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
528 if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
531 promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
534 if (promoted_len1 > promoted_len2)
536 unsigned_operation = is_unsigned1;
537 result_len = promoted_len1;
539 else if (promoted_len2 > promoted_len1)
541 unsigned_operation = is_unsigned2;
542 result_len = promoted_len2;
546 unsigned_operation = is_unsigned1 || is_unsigned2;
547 result_len = promoted_len1;
550 switch (language->la_language)
556 if (result_len <= TYPE_LENGTH (builtin->builtin_int))
558 promoted_type = (unsigned_operation
559 ? builtin->builtin_unsigned_int
560 : builtin->builtin_int);
562 else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
564 promoted_type = (unsigned_operation
565 ? builtin->builtin_unsigned_long
566 : builtin->builtin_long);
570 promoted_type = (unsigned_operation
571 ? builtin->builtin_unsigned_long_long
572 : builtin->builtin_long_long);
575 case language_opencl:
576 if (result_len <= TYPE_LENGTH (lookup_signed_typename
577 (language, gdbarch, "int")))
581 ? lookup_unsigned_typename (language, gdbarch, "int")
582 : lookup_signed_typename (language, gdbarch, "int"));
584 else if (result_len <= TYPE_LENGTH (lookup_signed_typename
585 (language, gdbarch, "long")))
589 ? lookup_unsigned_typename (language, gdbarch, "long")
590 : lookup_signed_typename (language, gdbarch,"long"));
594 /* For other languages the result type is unchanged from gdb
595 version 6.7 for backward compatibility.
596 If either arg was long long, make sure that value is also long
597 long. Otherwise use long. */
598 if (unsigned_operation)
600 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
601 promoted_type = builtin->builtin_unsigned_long_long;
603 promoted_type = builtin->builtin_unsigned_long;
607 if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
608 promoted_type = builtin->builtin_long_long;
610 promoted_type = builtin->builtin_long;
618 /* Promote both operands to common type. */
619 *arg1 = value_cast (promoted_type, *arg1);
620 *arg2 = value_cast (promoted_type, *arg2);
625 ptrmath_type_p (const struct language_defn *lang, struct type *type)
627 type = check_typedef (type);
628 if (TYPE_IS_REFERENCE (type))
629 type = TYPE_TARGET_TYPE (type);
631 switch (TYPE_CODE (type))
637 case TYPE_CODE_ARRAY:
638 return TYPE_VECTOR (type) ? 0 : lang->c_style_arrays;
645 /* Represents a fake method with the given parameter types. This is
646 used by the parser to construct a temporary "expected" type for
647 method overload resolution. FLAGS is used as instance flags of the
648 new type, in order to be able to make the new type represent a
649 const/volatile overload. */
654 fake_method (type_instance_flags flags,
655 int num_types, struct type **param_types);
658 /* The constructed type. */
659 struct type *type () { return &m_type; }
662 struct type m_type {};
663 main_type m_main_type {};
666 fake_method::fake_method (type_instance_flags flags,
667 int num_types, struct type **param_types)
669 struct type *type = &m_type;
671 TYPE_MAIN_TYPE (type) = &m_main_type;
672 TYPE_LENGTH (type) = 1;
673 TYPE_CODE (type) = TYPE_CODE_METHOD;
674 TYPE_CHAIN (type) = type;
675 TYPE_INSTANCE_FLAGS (type) = flags;
678 if (param_types[num_types - 1] == NULL)
681 TYPE_VARARGS (type) = 1;
683 else if (TYPE_CODE (check_typedef (param_types[num_types - 1]))
687 /* Caller should have ensured this. */
688 gdb_assert (num_types == 0);
689 TYPE_PROTOTYPED (type) = 1;
693 TYPE_NFIELDS (type) = num_types;
694 TYPE_FIELDS (type) = (struct field *)
695 TYPE_ZALLOC (type, sizeof (struct field) * num_types);
697 while (num_types-- > 0)
698 TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
701 fake_method::~fake_method ()
703 xfree (TYPE_FIELDS (&m_type));
706 /* Helper for evaluating an OP_VAR_VALUE. */
709 evaluate_var_value (enum noside noside, const block *blk, symbol *var)
711 /* JYG: We used to just return value_zero of the symbol type if
712 we're asked to avoid side effects. Otherwise we return
713 value_of_variable (...). However I'm not sure if
714 value_of_variable () has any side effect. We need a full value
715 object returned here for whatis_exp () to call evaluate_type ()
716 and then pass the full value to value_rtti_target_type () if we
717 are dealing with a pointer or reference to a base class and print
720 struct value *ret = NULL;
724 ret = value_of_variable (var, blk);
727 CATCH (except, RETURN_MASK_ERROR)
729 if (noside != EVAL_AVOID_SIDE_EFFECTS)
730 throw_exception (except);
732 ret = value_zero (SYMBOL_TYPE (var), not_lval);
739 /* Helper for evaluating an OP_VAR_MSYM_VALUE. */
742 evaluate_var_msym_value (enum noside noside,
743 struct objfile *objfile, minimal_symbol *msymbol)
745 if (noside == EVAL_AVOID_SIDE_EFFECTS)
747 type *the_type = find_minsym_type_and_address (msymbol, objfile, NULL);
748 return value_zero (the_type, not_lval);
753 type *the_type = find_minsym_type_and_address (msymbol, objfile, &address);
754 return value_at_lazy (the_type, address);
758 /* Helper for returning a value when handling EVAL_SKIP. */
761 eval_skip_value (expression *exp)
763 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
766 /* Evaluate a function call. The function to be called is in
767 ARGVEC[0] and the arguments passed to the function are in
768 ARGVEC[1..NARGS]. FUNCTION_NAME is the name of the function, if
769 known. DEFAULT_RETURN_TYPE is used as the function's return type
770 if the return type is unknown. */
773 eval_call (expression *exp, enum noside noside,
774 int nargs, value **argvec,
775 const char *function_name,
776 type *default_return_type)
778 if (argvec[0] == NULL)
779 error (_("Cannot evaluate function -- may be inlined"));
780 if (noside == EVAL_AVOID_SIDE_EFFECTS)
782 /* If the return type doesn't look like a function type,
783 call an error. This can happen if somebody tries to turn
784 a variable into a function call. */
786 type *ftype = value_type (argvec[0]);
788 if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
790 /* We don't know anything about what the internal
791 function might return, but we have to return
793 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
796 else if (TYPE_CODE (ftype) == TYPE_CODE_XMETHOD)
799 = result_type_of_xmethod (argvec[0], nargs, argvec + 1);
801 if (return_type == NULL)
802 error (_("Xmethod is missing return type."));
803 return value_zero (return_type, not_lval);
805 else if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
806 || TYPE_CODE (ftype) == TYPE_CODE_METHOD)
808 type *return_type = TYPE_TARGET_TYPE (ftype);
810 if (return_type == NULL)
811 return_type = default_return_type;
813 if (return_type == NULL)
814 error_call_unknown_return_type (function_name);
816 return allocate_value (return_type);
819 error (_("Expression of type other than "
820 "\"Function returning ...\" used as function"));
822 switch (TYPE_CODE (value_type (argvec[0])))
824 case TYPE_CODE_INTERNAL_FUNCTION:
825 return call_internal_function (exp->gdbarch, exp->language_defn,
826 argvec[0], nargs, argvec + 1);
827 case TYPE_CODE_XMETHOD:
828 return call_xmethod (argvec[0], nargs, argvec + 1);
830 return call_function_by_hand (argvec[0], default_return_type,
835 /* Helper for evaluating an OP_FUNCALL. */
838 evaluate_funcall (type *expect_type, expression *exp, int *pos,
846 symbol *function = NULL;
847 char *function_name = NULL;
848 const char *var_func_name = NULL;
853 exp_opcode op = exp->elts[*pos].opcode;
854 int nargs = longest_to_int (exp->elts[pc].longconst);
855 /* Allocate arg vector, including space for the function to be
856 called in argvec[0], a potential `this', and a terminating
858 value **argvec = (value **) alloca (sizeof (value *) * (nargs + 3));
859 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
861 /* First, evaluate the structure into arg2. */
864 if (op == STRUCTOP_MEMBER)
866 arg2 = evaluate_subexp_for_address (exp, pos, noside);
870 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
873 /* If the function is a virtual function, then the aggregate
874 value (providing the structure) plays its part by providing
875 the vtable. Otherwise, it is just along for the ride: call
876 the function directly. */
878 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
880 type *a1_type = check_typedef (value_type (arg1));
881 if (noside == EVAL_SKIP)
882 tem = 1; /* Set it to the right arg index so that all
883 arguments can also be skipped. */
884 else if (TYPE_CODE (a1_type) == TYPE_CODE_METHODPTR)
886 if (noside == EVAL_AVOID_SIDE_EFFECTS)
887 arg1 = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval);
889 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
891 /* Now, say which argument to start evaluating from. */
896 else if (TYPE_CODE (a1_type) == TYPE_CODE_MEMBERPTR)
898 struct type *type_ptr
899 = lookup_pointer_type (TYPE_SELF_TYPE (a1_type));
900 struct type *target_type_ptr
901 = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type));
903 /* Now, convert these values to an address. */
904 arg2 = value_cast (type_ptr, arg2);
906 long mem_offset = value_as_long (arg1);
908 arg1 = value_from_pointer (target_type_ptr,
909 value_as_long (arg2) + mem_offset);
910 arg1 = value_ind (arg1);
914 error (_("Non-pointer-to-member value used in pointer-to-member "
917 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
919 /* Hair for method invocations. */
923 /* First, evaluate the structure into arg2. */
925 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
926 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
928 if (op == STRUCTOP_STRUCT)
930 /* If v is a variable in a register, and the user types
931 v.method (), this will produce an error, because v has no
934 A possible way around this would be to allocate a copy of
935 the variable on the stack, copy in the contents, call the
936 function, and copy out the contents. I.e. convert this
937 from call by reference to call by copy-return (or
938 whatever it's called). However, this does not work
939 because it is not the same: the method being called could
940 stash a copy of the address, and then future uses through
941 that address (after the method returns) would be expected
942 to use the variable itself, not some copy of it. */
943 arg2 = evaluate_subexp_for_address (exp, pos, noside);
947 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
949 /* Check to see if the operator '->' has been overloaded.
950 If the operator has been overloaded replace arg2 with the
951 value returned by the custom operator and continue
953 while (unop_user_defined_p (op, arg2))
955 struct value *value = NULL;
958 value = value_x_unop (arg2, op, noside);
961 CATCH (except, RETURN_MASK_ERROR)
963 if (except.error == NOT_FOUND_ERROR)
966 throw_exception (except);
973 /* Now, say which argument to start evaluating from. */
976 else if (op == OP_SCOPE
977 && overload_resolution
978 && (exp->language_defn->la_language == language_cplus))
980 /* Unpack it locally so we can properly handle overload
986 local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
987 (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
988 struct type *type = exp->elts[pc2 + 1].type;
989 name = &exp->elts[pc2 + 3].string;
992 function_name = NULL;
993 if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
995 function = cp_lookup_symbol_namespace (TYPE_TAG_NAME (type),
997 get_selected_block (0),
999 if (function == NULL)
1000 error (_("No symbol \"%s\" in namespace \"%s\"."),
1001 name, TYPE_TAG_NAME (type));
1004 /* arg2 is left as NULL on purpose. */
1008 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1009 || TYPE_CODE (type) == TYPE_CODE_UNION);
1010 function_name = name;
1012 /* We need a properly typed value for method lookup. For
1013 static methods arg2 is otherwise unused. */
1014 arg2 = value_zero (type, lval_memory);
1019 else if (op == OP_ADL_FUNC)
1021 /* Save the function position and move pos so that the arguments
1022 can be evaluated. */
1028 func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst);
1029 (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1);
1033 /* Non-method function call. */
1037 /* If this is a C++ function wait until overload resolution. */
1038 if (op == OP_VAR_VALUE
1039 && overload_resolution
1040 && (exp->language_defn->la_language == language_cplus))
1042 (*pos) += 4; /* Skip the evaluation of the symbol. */
1047 if (op == OP_VAR_MSYM_VALUE)
1049 symbol *sym = exp->elts[*pos + 2].symbol;
1050 var_func_name = SYMBOL_PRINT_NAME (sym);
1052 else if (op == OP_VAR_VALUE)
1054 minimal_symbol *msym = exp->elts[*pos + 2].msymbol;
1055 var_func_name = MSYMBOL_PRINT_NAME (msym);
1058 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1059 type *type = value_type (argvec[0]);
1060 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1061 type = TYPE_TARGET_TYPE (type);
1062 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1064 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1066 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type,
1074 /* Evaluate arguments (if not already done, e.g., namespace::func()
1075 and overload-resolution is off). */
1076 for (; tem <= nargs; tem++)
1078 /* Ensure that array expressions are coerced into pointer
1080 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1083 /* Signal end of arglist. */
1086 if (noside == EVAL_SKIP)
1087 return eval_skip_value (exp);
1089 if (op == OP_ADL_FUNC)
1091 struct symbol *symp;
1094 int string_pc = save_pos1 + 3;
1096 /* Extract the function name. */
1097 name_len = longest_to_int (exp->elts[string_pc].longconst);
1098 func_name = (char *) alloca (name_len + 1);
1099 strcpy (func_name, &exp->elts[string_pc + 1].string);
1101 find_overload_match (&argvec[1], nargs, func_name,
1102 NON_METHOD, /* not method */
1103 NULL, NULL, /* pass NULL symbol since
1104 symbol is unknown */
1105 NULL, &symp, NULL, 0, noside);
1107 /* Now fix the expression being evaluated. */
1108 exp->elts[save_pos1 + 2].symbol = symp;
1109 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1112 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
1113 || (op == OP_SCOPE && function_name != NULL))
1115 int static_memfuncp;
1118 /* Method invocation: stuff "this" as first parameter. If the
1119 method turns out to be static we undo this below. */
1124 /* Name of method from expression. */
1125 tstr = &exp->elts[pc2 + 2].string;
1128 tstr = function_name;
1130 if (overload_resolution && (exp->language_defn->la_language
1133 /* Language is C++, do some overload resolution before
1135 struct value *valp = NULL;
1137 (void) find_overload_match (&argvec[1], nargs, tstr,
1138 METHOD, /* method */
1139 &arg2, /* the object */
1141 &static_memfuncp, 0, noside);
1143 if (op == OP_SCOPE && !static_memfuncp)
1145 /* For the time being, we don't handle this. */
1146 error (_("Call to overloaded function %s requires "
1150 argvec[1] = arg2; /* the ``this'' pointer */
1151 argvec[0] = valp; /* Use the method found after overload
1155 /* Non-C++ case -- or no overload resolution. */
1157 struct value *temp = arg2;
1159 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1161 op == STRUCTOP_STRUCT
1162 ? "structure" : "structure pointer");
1163 /* value_struct_elt updates temp with the correct value of
1164 the ``this'' pointer if necessary, so modify argvec[1] to
1165 reflect any ``this'' changes. */
1167 = value_from_longest (lookup_pointer_type(value_type (temp)),
1168 value_address (temp)
1169 + value_embedded_offset (temp));
1170 argvec[1] = arg2; /* the ``this'' pointer */
1173 /* Take out `this' if needed. */
1174 if (static_memfuncp)
1176 argvec[1] = argvec[0];
1181 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1183 /* Pointer to member. argvec[1] is already set up. */
1186 else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
1188 /* Non-member function being called. */
1189 /* fn: This can only be done for C++ functions. A C-style
1190 function in a C++ program, for instance, does not have the
1191 fields that are expected here. */
1193 if (overload_resolution && (exp->language_defn->la_language
1196 /* Language is C++, do some overload resolution before
1198 struct symbol *symp;
1201 /* If a scope has been specified disable ADL. */
1205 if (op == OP_VAR_VALUE)
1206 function = exp->elts[save_pos1+2].symbol;
1208 (void) find_overload_match (&argvec[1], nargs,
1209 NULL, /* no need for name */
1210 NON_METHOD, /* not method */
1211 NULL, function, /* the function */
1212 NULL, &symp, NULL, no_adl, noside);
1214 if (op == OP_VAR_VALUE)
1216 /* Now fix the expression being evaluated. */
1217 exp->elts[save_pos1+2].symbol = symp;
1218 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
1222 argvec[0] = value_of_variable (symp, get_selected_block (0));
1226 /* Not C++, or no overload resolution allowed. */
1227 /* Nothing to be done; argvec already correctly set up. */
1232 /* It is probably a C-style function. */
1233 /* Nothing to be done; argvec already correctly set up. */
1236 return eval_call (exp, noside, nargs, argvec, var_func_name, expect_type);
1240 evaluate_subexp_standard (struct type *expect_type,
1241 struct expression *exp, int *pos,
1245 int tem, tem2, tem3;
1247 struct value *arg1 = NULL;
1248 struct value *arg2 = NULL;
1252 struct value **argvec;
1256 struct type **arg_types;
1259 op = exp->elts[pc].opcode;
1264 tem = longest_to_int (exp->elts[pc + 2].longconst);
1265 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
1266 if (noside == EVAL_SKIP)
1267 return eval_skip_value (exp);
1268 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
1269 &exp->elts[pc + 3].string,
1270 expect_type, 0, noside);
1272 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
1277 return value_from_longest (exp->elts[pc + 1].type,
1278 exp->elts[pc + 2].longconst);
1282 return value_from_contents (exp->elts[pc + 1].type,
1283 exp->elts[pc + 2].floatconst);
1288 if (noside == EVAL_SKIP)
1289 return eval_skip_value (exp);
1292 symbol *var = exp->elts[pc + 2].symbol;
1293 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_ERROR)
1294 error_unknown_type (SYMBOL_PRINT_NAME (var));
1296 return evaluate_var_value (noside, exp->elts[pc + 1].block, var);
1299 case OP_VAR_MSYM_VALUE:
1303 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
1304 value *val = evaluate_var_msym_value (noside,
1305 exp->elts[pc + 1].objfile,
1308 type = value_type (val);
1309 if (TYPE_CODE (type) == TYPE_CODE_ERROR
1310 && (noside != EVAL_AVOID_SIDE_EFFECTS || pc != 0))
1311 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
1315 case OP_VAR_ENTRY_VALUE:
1317 if (noside == EVAL_SKIP)
1318 return eval_skip_value (exp);
1321 struct symbol *sym = exp->elts[pc + 1].symbol;
1322 struct frame_info *frame;
1324 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1325 return value_zero (SYMBOL_TYPE (sym), not_lval);
1327 if (SYMBOL_COMPUTED_OPS (sym) == NULL
1328 || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL)
1329 error (_("Symbol \"%s\" does not have any specific entry value"),
1330 SYMBOL_PRINT_NAME (sym));
1332 frame = get_selected_frame (NULL);
1333 return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
1336 case OP_FUNC_STATIC_VAR:
1337 tem = longest_to_int (exp->elts[pc + 1].longconst);
1338 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1339 if (noside == EVAL_SKIP)
1340 return eval_skip_value (exp);
1343 value *func = evaluate_subexp_standard (NULL, exp, pos, noside);
1344 CORE_ADDR addr = value_address (func);
1346 const block *blk = block_for_pc (addr);
1347 const char *var = &exp->elts[pc + 2].string;
1349 struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL);
1351 if (sym.symbol == NULL)
1352 error (_("No symbol \"%s\" in specified context."), var);
1354 return evaluate_var_value (noside, sym.block, sym.symbol);
1360 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
1364 const char *name = &exp->elts[pc + 2].string;
1368 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
1369 regno = user_reg_map_name_to_regnum (exp->gdbarch,
1370 name, strlen (name));
1372 error (_("Register $%s not available."), name);
1374 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
1375 a value with the appropriate register type. Unfortunately,
1376 we don't have easy access to the type of user registers.
1377 So for these registers, we fetch the register value regardless
1378 of the evaluation mode. */
1379 if (noside == EVAL_AVOID_SIDE_EFFECTS
1380 && regno < gdbarch_num_regs (exp->gdbarch)
1381 + gdbarch_num_pseudo_regs (exp->gdbarch))
1382 val = value_zero (register_type (exp->gdbarch, regno), not_lval);
1384 val = value_of_register (regno, get_selected_frame (NULL));
1386 error (_("Value of register %s not available."), name);
1392 type = language_bool_type (exp->language_defn, exp->gdbarch);
1393 return value_from_longest (type, exp->elts[pc + 1].longconst);
1395 case OP_INTERNALVAR:
1397 return value_of_internalvar (exp->gdbarch,
1398 exp->elts[pc + 1].internalvar);
1401 tem = longest_to_int (exp->elts[pc + 1].longconst);
1402 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1403 if (noside == EVAL_SKIP)
1404 return eval_skip_value (exp);
1405 type = language_string_char_type (exp->language_defn, exp->gdbarch);
1406 return value_string (&exp->elts[pc + 2].string, tem, type);
1408 case OP_OBJC_NSSTRING: /* Objective C Foundation Class
1409 NSString constant. */
1410 tem = longest_to_int (exp->elts[pc + 1].longconst);
1411 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1412 if (noside == EVAL_SKIP)
1413 return eval_skip_value (exp);
1414 return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
1418 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
1419 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
1420 nargs = tem3 - tem2 + 1;
1421 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
1423 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1424 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
1426 struct value *rec = allocate_value (expect_type);
1428 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
1429 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
1432 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1433 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
1435 struct type *range_type = TYPE_INDEX_TYPE (type);
1436 struct type *element_type = TYPE_TARGET_TYPE (type);
1437 struct value *array = allocate_value (expect_type);
1438 int element_size = TYPE_LENGTH (check_typedef (element_type));
1439 LONGEST low_bound, high_bound, index;
1441 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
1444 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
1447 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
1448 for (tem = nargs; --nargs >= 0;)
1450 struct value *element;
1453 element = evaluate_subexp (element_type, exp, pos, noside);
1454 if (value_type (element) != element_type)
1455 element = value_cast (element_type, element);
1458 int continue_pc = *pos;
1461 index = init_array_element (array, element, exp, pos, noside,
1462 low_bound, high_bound);
1467 if (index > high_bound)
1468 /* To avoid memory corruption. */
1469 error (_("Too many array elements"));
1470 memcpy (value_contents_raw (array)
1471 + (index - low_bound) * element_size,
1472 value_contents (element),
1480 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
1481 && TYPE_CODE (type) == TYPE_CODE_SET)
1483 struct value *set = allocate_value (expect_type);
1484 gdb_byte *valaddr = value_contents_raw (set);
1485 struct type *element_type = TYPE_INDEX_TYPE (type);
1486 struct type *check_type = element_type;
1487 LONGEST low_bound, high_bound;
1489 /* Get targettype of elementtype. */
1490 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
1491 || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
1492 check_type = TYPE_TARGET_TYPE (check_type);
1494 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
1495 error (_("(power)set type with unknown size"));
1496 memset (valaddr, '\0', TYPE_LENGTH (type));
1497 for (tem = 0; tem < nargs; tem++)
1499 LONGEST range_low, range_high;
1500 struct type *range_low_type, *range_high_type;
1501 struct value *elem_val;
1503 elem_val = evaluate_subexp (element_type, exp, pos, noside);
1504 range_low_type = range_high_type = value_type (elem_val);
1505 range_low = range_high = value_as_long (elem_val);
1507 /* Check types of elements to avoid mixture of elements from
1508 different types. Also check if type of element is "compatible"
1509 with element type of powerset. */
1510 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
1511 range_low_type = TYPE_TARGET_TYPE (range_low_type);
1512 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
1513 range_high_type = TYPE_TARGET_TYPE (range_high_type);
1514 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
1515 || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
1516 && (range_low_type != range_high_type)))
1517 /* different element modes. */
1518 error (_("POWERSET tuple elements of different mode"));
1519 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
1520 || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
1521 && range_low_type != check_type))
1522 error (_("incompatible POWERSET tuple elements"));
1523 if (range_low > range_high)
1525 warning (_("empty POWERSET tuple range"));
1528 if (range_low < low_bound || range_high > high_bound)
1529 error (_("POWERSET tuple element out of range"));
1530 range_low -= low_bound;
1531 range_high -= low_bound;
1532 for (; range_low <= range_high; range_low++)
1534 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
1536 if (gdbarch_bits_big_endian (exp->gdbarch))
1537 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
1538 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
1545 argvec = XALLOCAVEC (struct value *, nargs);
1546 for (tem = 0; tem < nargs; tem++)
1548 /* Ensure that array expressions are coerced into pointer
1550 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1552 if (noside == EVAL_SKIP)
1553 return eval_skip_value (exp);
1554 return value_array (tem2, tem3, argvec);
1558 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1560 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1562 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
1564 if (noside == EVAL_SKIP)
1565 return eval_skip_value (exp);
1566 return value_slice (array, lowbound, upper - lowbound + 1);
1570 /* Skip third and second args to evaluate the first one. */
1571 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1572 if (value_logical_not (arg1))
1574 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1575 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1579 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1580 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
1584 case OP_OBJC_SELECTOR:
1585 { /* Objective C @selector operator. */
1586 char *sel = &exp->elts[pc + 2].string;
1587 int len = longest_to_int (exp->elts[pc + 1].longconst);
1588 struct type *selector_type;
1590 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
1591 if (noside == EVAL_SKIP)
1592 return eval_skip_value (exp);
1595 sel[len] = 0; /* Make sure it's terminated. */
1597 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1598 return value_from_longest (selector_type,
1599 lookup_child_selector (exp->gdbarch, sel));
1602 case OP_OBJC_MSGCALL:
1603 { /* Objective C message (method) call. */
1605 CORE_ADDR responds_selector = 0;
1606 CORE_ADDR method_selector = 0;
1608 CORE_ADDR selector = 0;
1610 int struct_return = 0;
1611 enum noside sub_no_side = EVAL_NORMAL;
1613 struct value *msg_send = NULL;
1614 struct value *msg_send_stret = NULL;
1615 int gnu_runtime = 0;
1617 struct value *target = NULL;
1618 struct value *method = NULL;
1619 struct value *called_method = NULL;
1621 struct type *selector_type = NULL;
1622 struct type *long_type;
1624 struct value *ret = NULL;
1627 selector = exp->elts[pc + 1].longconst;
1628 nargs = exp->elts[pc + 2].longconst;
1629 argvec = XALLOCAVEC (struct value *, nargs + 5);
1633 long_type = builtin_type (exp->gdbarch)->builtin_long;
1634 selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
1636 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1637 sub_no_side = EVAL_NORMAL;
1639 sub_no_side = noside;
1641 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
1643 if (value_as_long (target) == 0)
1644 return value_from_longest (long_type, 0);
1646 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym)
1649 /* Find the method dispatch (Apple runtime) or method lookup
1650 (GNU runtime) function for Objective-C. These will be used
1651 to lookup the symbol information for the method. If we
1652 can't find any symbol information, then we'll use these to
1653 call the method, otherwise we can call the method
1654 directly. The msg_send_stret function is used in the special
1655 case of a method that returns a structure (Apple runtime
1659 struct type *type = selector_type;
1661 type = lookup_function_type (type);
1662 type = lookup_pointer_type (type);
1663 type = lookup_function_type (type);
1664 type = lookup_pointer_type (type);
1666 msg_send = find_function_in_inferior ("objc_msg_lookup", NULL);
1668 = find_function_in_inferior ("objc_msg_lookup", NULL);
1670 msg_send = value_from_pointer (type, value_as_address (msg_send));
1671 msg_send_stret = value_from_pointer (type,
1672 value_as_address (msg_send_stret));
1676 msg_send = find_function_in_inferior ("objc_msgSend", NULL);
1677 /* Special dispatcher for methods returning structs. */
1679 = find_function_in_inferior ("objc_msgSend_stret", NULL);
1682 /* Verify the target object responds to this method. The
1683 standard top-level 'Object' class uses a different name for
1684 the verification method than the non-standard, but more
1685 often used, 'NSObject' class. Make sure we check for both. */
1688 = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
1689 if (responds_selector == 0)
1691 = lookup_child_selector (exp->gdbarch, "respondsTo:");
1693 if (responds_selector == 0)
1694 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1697 = lookup_child_selector (exp->gdbarch, "methodForSelector:");
1698 if (method_selector == 0)
1700 = lookup_child_selector (exp->gdbarch, "methodFor:");
1702 if (method_selector == 0)
1703 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1705 /* Call the verification method, to make sure that the target
1706 class implements the desired method. */
1708 argvec[0] = msg_send;
1710 argvec[2] = value_from_longest (long_type, responds_selector);
1711 argvec[3] = value_from_longest (long_type, selector);
1714 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1717 /* Function objc_msg_lookup returns a pointer. */
1719 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1721 if (value_as_long (ret) == 0)
1722 error (_("Target does not respond to this message selector."));
1724 /* Call "methodForSelector:" method, to get the address of a
1725 function method that implements this selector for this
1726 class. If we can find a symbol at that address, then we
1727 know the return type, parameter types etc. (that's a good
1730 argvec[0] = msg_send;
1732 argvec[2] = value_from_longest (long_type, method_selector);
1733 argvec[3] = value_from_longest (long_type, selector);
1736 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1740 ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
1743 /* ret should now be the selector. */
1745 addr = value_as_long (ret);
1748 struct symbol *sym = NULL;
1750 /* The address might point to a function descriptor;
1751 resolve it to the actual code address instead. */
1752 addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
1755 /* Is it a high_level symbol? */
1756 sym = find_pc_function (addr);
1758 method = value_of_variable (sym, 0);
1761 /* If we found a method with symbol information, check to see
1762 if it returns a struct. Otherwise assume it doesn't. */
1767 struct type *val_type;
1769 funaddr = find_function_addr (method, &val_type);
1771 block_for_pc (funaddr);
1773 val_type = check_typedef (val_type);
1775 if ((val_type == NULL)
1776 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
1778 if (expect_type != NULL)
1779 val_type = expect_type;
1782 struct_return = using_struct_return (exp->gdbarch, method,
1785 else if (expect_type != NULL)
1787 struct_return = using_struct_return (exp->gdbarch, NULL,
1788 check_typedef (expect_type));
1791 /* Found a function symbol. Now we will substitute its
1792 value in place of the message dispatcher (obj_msgSend),
1793 so that we call the method directly instead of thru
1794 the dispatcher. The main reason for doing this is that
1795 we can now evaluate the return value and parameter values
1796 according to their known data types, in case we need to
1797 do things like promotion, dereferencing, special handling
1798 of structs and doubles, etc.
1800 We want to use the type signature of 'method', but still
1801 jump to objc_msgSend() or objc_msgSend_stret() to better
1802 mimic the behavior of the runtime. */
1806 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
1807 error (_("method address has symbol information "
1808 "with non-function type; skipping"));
1810 /* Create a function pointer of the appropriate type, and
1811 replace its value with the value of msg_send or
1812 msg_send_stret. We must use a pointer here, as
1813 msg_send and msg_send_stret are of pointer type, and
1814 the representation may be different on systems that use
1815 function descriptors. */
1818 = value_from_pointer (lookup_pointer_type (value_type (method)),
1819 value_as_address (msg_send_stret));
1822 = value_from_pointer (lookup_pointer_type (value_type (method)),
1823 value_as_address (msg_send));
1828 called_method = msg_send_stret;
1830 called_method = msg_send;
1833 if (noside == EVAL_SKIP)
1834 return eval_skip_value (exp);
1836 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1838 /* If the return type doesn't look like a function type,
1839 call an error. This can happen if somebody tries to
1840 turn a variable into a function call. This is here
1841 because people often want to call, eg, strcmp, which
1842 gdb doesn't know is a function. If gdb isn't asked for
1843 it's opinion (ie. through "whatis"), it won't offer
1846 struct type *type = value_type (called_method);
1848 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1849 type = TYPE_TARGET_TYPE (type);
1850 type = TYPE_TARGET_TYPE (type);
1854 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1855 return allocate_value (expect_type);
1857 return allocate_value (type);
1860 error (_("Expression of type other than "
1861 "\"method returning ...\" used as a method"));
1864 /* Now depending on whether we found a symbol for the method,
1865 we will either call the runtime dispatcher or the method
1868 argvec[0] = called_method;
1870 argvec[2] = value_from_longest (long_type, selector);
1871 /* User-supplied arguments. */
1872 for (tem = 0; tem < nargs; tem++)
1873 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1874 argvec[tem + 3] = 0;
1876 if (gnu_runtime && (method != NULL))
1878 /* Function objc_msg_lookup returns a pointer. */
1879 deprecated_set_value_type (argvec[0],
1880 lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
1882 = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1885 ret = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
1891 return evaluate_funcall (expect_type, exp, pos, noside);
1893 case OP_F77_UNDETERMINED_ARGLIST:
1895 /* Remember that in F77, functions, substring ops and
1896 array subscript operations cannot be disambiguated
1897 at parse time. We have made all array subscript operations,
1898 substring operations as well as function calls come here
1899 and we now have to discover what the heck this thing actually was.
1900 If it is a function, we process just as if we got an OP_FUNCALL. */
1902 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1905 /* First determine the type code we are dealing with. */
1906 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1907 type = check_typedef (value_type (arg1));
1908 code = TYPE_CODE (type);
1910 if (code == TYPE_CODE_PTR)
1912 /* Fortran always passes variable to subroutines as pointer.
1913 So we need to look into its target type to see if it is
1914 array, string or function. If it is, we need to switch
1915 to the target value the original one points to. */
1916 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1918 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1919 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1920 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1922 arg1 = value_ind (arg1);
1923 type = check_typedef (value_type (arg1));
1924 code = TYPE_CODE (type);
1930 case TYPE_CODE_ARRAY:
1931 if (exp->elts[*pos].opcode == OP_RANGE)
1932 return value_f90_subarray (arg1, exp, pos, noside);
1934 goto multi_f77_subscript;
1936 case TYPE_CODE_STRING:
1937 if (exp->elts[*pos].opcode == OP_RANGE)
1938 return value_f90_subarray (arg1, exp, pos, noside);
1941 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1942 return value_subscript (arg1, value_as_long (arg2));
1946 case TYPE_CODE_FUNC:
1947 /* It's a function call. */
1948 /* Allocate arg vector, including space for the function to be
1949 called in argvec[0] and a terminating NULL. */
1950 argvec = (struct value **)
1951 alloca (sizeof (struct value *) * (nargs + 2));
1954 for (; tem <= nargs; tem++)
1955 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1956 argvec[tem] = 0; /* signal end of arglist */
1957 if (noside == EVAL_SKIP)
1958 return eval_skip_value (exp);
1959 return eval_call (exp, noside, nargs, argvec, NULL, expect_type);
1962 error (_("Cannot perform substring on this type"));
1966 /* We have a complex number, There should be 2 floating
1967 point numbers that compose it. */
1969 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1970 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1972 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1974 case STRUCTOP_STRUCT:
1975 tem = longest_to_int (exp->elts[pc + 1].longconst);
1976 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1977 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1978 if (noside == EVAL_SKIP)
1979 return eval_skip_value (exp);
1980 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
1982 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1983 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
1987 tem = longest_to_int (exp->elts[pc + 1].longconst);
1988 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1989 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1990 if (noside == EVAL_SKIP)
1991 return eval_skip_value (exp);
1993 /* Check to see if operator '->' has been overloaded. If so replace
1994 arg1 with the value returned by evaluating operator->(). */
1995 while (unop_user_defined_p (op, arg1))
1997 struct value *value = NULL;
2000 value = value_x_unop (arg1, op, noside);
2003 CATCH (except, RETURN_MASK_ERROR)
2005 if (except.error == NOT_FOUND_ERROR)
2008 throw_exception (except);
2015 /* JYG: if print object is on we need to replace the base type
2016 with rtti type in order to continue on with successful
2017 lookup of member / method only available in the rtti type. */
2019 struct type *type = value_type (arg1);
2020 struct type *real_type;
2021 int full, using_enc;
2023 struct value_print_options opts;
2025 get_user_print_options (&opts);
2026 if (opts.objectprint && TYPE_TARGET_TYPE(type)
2027 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
2029 real_type = value_rtti_indirect_type (arg1, &full, &top,
2032 arg1 = value_cast (real_type, arg1);
2036 arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
2037 NULL, "structure pointer");
2038 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2039 arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
2042 case STRUCTOP_MEMBER:
2044 if (op == STRUCTOP_MEMBER)
2045 arg1 = evaluate_subexp_for_address (exp, pos, noside);
2047 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2049 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2051 if (noside == EVAL_SKIP)
2052 return eval_skip_value (exp);
2054 type = check_typedef (value_type (arg2));
2055 switch (TYPE_CODE (type))
2057 case TYPE_CODE_METHODPTR:
2058 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2059 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
2062 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
2063 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
2064 return value_ind (arg2);
2067 case TYPE_CODE_MEMBERPTR:
2068 /* Now, convert these values to an address. */
2069 arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)),
2072 mem_offset = value_as_long (arg2);
2074 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2075 value_as_long (arg1) + mem_offset);
2076 return value_ind (arg3);
2079 error (_("non-pointer-to-member value used "
2080 "in pointer-to-member construct"));
2085 type_instance_flags flags
2086 = (type_instance_flag_value) longest_to_int (exp->elts[pc + 1].longconst);
2087 nargs = longest_to_int (exp->elts[pc + 2].longconst);
2088 arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
2089 for (ix = 0; ix < nargs; ++ix)
2090 arg_types[ix] = exp->elts[pc + 2 + ix + 1].type;
2092 fake_method expect_type (flags, nargs, arg_types);
2093 *(pos) += 4 + nargs;
2094 return evaluate_subexp_standard (expect_type.type (), exp, pos, noside);
2098 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2099 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2100 if (noside == EVAL_SKIP)
2101 return eval_skip_value (exp);
2102 if (binop_user_defined_p (op, arg1, arg2))
2103 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2105 return value_concat (arg1, arg2);
2108 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2109 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2111 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2113 if (binop_user_defined_p (op, arg1, arg2))
2114 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2116 return value_assign (arg1, arg2);
2118 case BINOP_ASSIGN_MODIFY:
2120 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2121 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2122 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2124 op = exp->elts[pc + 1].opcode;
2125 if (binop_user_defined_p (op, arg1, arg2))
2126 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
2127 else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn,
2129 && is_integral_type (value_type (arg2)))
2130 arg2 = value_ptradd (arg1, value_as_long (arg2));
2131 else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn,
2133 && is_integral_type (value_type (arg2)))
2134 arg2 = value_ptradd (arg1, - value_as_long (arg2));
2137 struct value *tmp = arg1;
2139 /* For shift and integer exponentiation operations,
2140 only promote the first argument. */
2141 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2142 && is_integral_type (value_type (arg2)))
2143 unop_promote (exp->language_defn, exp->gdbarch, &tmp);
2145 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2147 arg2 = value_binop (tmp, arg2, op);
2149 return value_assign (arg1, arg2);
2152 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2153 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2154 if (noside == EVAL_SKIP)
2155 return eval_skip_value (exp);
2156 if (binop_user_defined_p (op, arg1, arg2))
2157 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2158 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2159 && is_integral_type (value_type (arg2)))
2160 return value_ptradd (arg1, value_as_long (arg2));
2161 else if (ptrmath_type_p (exp->language_defn, value_type (arg2))
2162 && is_integral_type (value_type (arg1)))
2163 return value_ptradd (arg2, value_as_long (arg1));
2166 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2167 return value_binop (arg1, arg2, BINOP_ADD);
2171 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2172 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2173 if (noside == EVAL_SKIP)
2174 return eval_skip_value (exp);
2175 if (binop_user_defined_p (op, arg1, arg2))
2176 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2177 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2178 && ptrmath_type_p (exp->language_defn, value_type (arg2)))
2180 /* FIXME -- should be ptrdiff_t */
2181 type = builtin_type (exp->gdbarch)->builtin_long;
2182 return value_from_longest (type, value_ptrdiff (arg1, arg2));
2184 else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
2185 && is_integral_type (value_type (arg2)))
2186 return value_ptradd (arg1, - value_as_long (arg2));
2189 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2190 return value_binop (arg1, arg2, BINOP_SUB);
2201 case BINOP_BITWISE_AND:
2202 case BINOP_BITWISE_IOR:
2203 case BINOP_BITWISE_XOR:
2204 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2205 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2206 if (noside == EVAL_SKIP)
2207 return eval_skip_value (exp);
2208 if (binop_user_defined_p (op, arg1, arg2))
2209 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2212 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2213 fudge arg2 to avoid division-by-zero, the caller is
2214 (theoretically) only looking for the type of the result. */
2215 if (noside == EVAL_AVOID_SIDE_EFFECTS
2216 /* ??? Do we really want to test for BINOP_MOD here?
2217 The implementation of value_binop gives it a well-defined
2220 || op == BINOP_INTDIV
2223 && value_logical_not (arg2))
2225 struct value *v_one, *retval;
2227 v_one = value_one (value_type (arg2));
2228 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
2229 retval = value_binop (arg1, v_one, op);
2234 /* For shift and integer exponentiation operations,
2235 only promote the first argument. */
2236 if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
2237 && is_integral_type (value_type (arg2)))
2238 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2240 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2242 return value_binop (arg1, arg2, op);
2246 case BINOP_SUBSCRIPT:
2247 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2248 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2249 if (noside == EVAL_SKIP)
2250 return eval_skip_value (exp);
2251 if (binop_user_defined_p (op, arg1, arg2))
2252 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2255 /* If the user attempts to subscript something that is not an
2256 array or pointer type (like a plain int variable for example),
2257 then report this as an error. */
2259 arg1 = coerce_ref (arg1);
2260 type = check_typedef (value_type (arg1));
2261 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
2262 && TYPE_CODE (type) != TYPE_CODE_PTR)
2264 if (TYPE_NAME (type))
2265 error (_("cannot subscript something of type `%s'"),
2268 error (_("cannot subscript requested type"));
2271 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2272 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
2274 return value_subscript (arg1, value_as_long (arg2));
2276 case MULTI_SUBSCRIPT:
2278 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2279 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
2282 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2283 /* FIXME: EVAL_SKIP handling may not be correct. */
2284 if (noside == EVAL_SKIP)
2288 return eval_skip_value (exp);
2290 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2291 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2293 /* If the user attempts to subscript something that has no target
2294 type (like a plain int variable for example), then report this
2297 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
2300 arg1 = value_zero (type, VALUE_LVAL (arg1));
2306 error (_("cannot subscript something of type `%s'"),
2307 TYPE_NAME (value_type (arg1)));
2311 if (binop_user_defined_p (op, arg1, arg2))
2313 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
2317 arg1 = coerce_ref (arg1);
2318 type = check_typedef (value_type (arg1));
2320 switch (TYPE_CODE (type))
2323 case TYPE_CODE_ARRAY:
2324 case TYPE_CODE_STRING:
2325 arg1 = value_subscript (arg1, value_as_long (arg2));
2329 if (TYPE_NAME (type))
2330 error (_("cannot subscript something of type `%s'"),
2333 error (_("cannot subscript requested type"));
2339 multi_f77_subscript:
2341 LONGEST subscript_array[MAX_FORTRAN_DIMS];
2342 int ndimensions = 1, i;
2343 struct value *array = arg1;
2345 if (nargs > MAX_FORTRAN_DIMS)
2346 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
2348 ndimensions = calc_f77_array_dims (type);
2350 if (nargs != ndimensions)
2351 error (_("Wrong number of subscripts"));
2353 gdb_assert (nargs > 0);
2355 /* Now that we know we have a legal array subscript expression
2356 let us actually find out where this element exists in the array. */
2358 /* Take array indices left to right. */
2359 for (i = 0; i < nargs; i++)
2361 /* Evaluate each subscript; it must be a legal integer in F77. */
2362 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
2364 /* Fill in the subscript array. */
2366 subscript_array[i] = value_as_long (arg2);
2369 /* Internal type of array is arranged right to left. */
2370 for (i = nargs; i > 0; i--)
2372 struct type *array_type = check_typedef (value_type (array));
2373 LONGEST index = subscript_array[i - 1];
2375 array = value_subscripted_rvalue (array, index,
2376 f77_get_lowerbound (array_type));
2382 case BINOP_LOGICAL_AND:
2383 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2384 if (noside == EVAL_SKIP)
2386 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2387 return eval_skip_value (exp);
2391 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2394 if (binop_user_defined_p (op, arg1, arg2))
2396 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2397 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2401 tem = value_logical_not (arg1);
2402 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2403 (tem ? EVAL_SKIP : noside));
2404 type = language_bool_type (exp->language_defn, exp->gdbarch);
2405 return value_from_longest (type,
2406 (LONGEST) (!tem && !value_logical_not (arg2)));
2409 case BINOP_LOGICAL_OR:
2410 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2411 if (noside == EVAL_SKIP)
2413 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2414 return eval_skip_value (exp);
2418 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2421 if (binop_user_defined_p (op, arg1, arg2))
2423 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2424 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2428 tem = value_logical_not (arg1);
2429 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
2430 (!tem ? EVAL_SKIP : noside));
2431 type = language_bool_type (exp->language_defn, exp->gdbarch);
2432 return value_from_longest (type,
2433 (LONGEST) (!tem || !value_logical_not (arg2)));
2437 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2438 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2439 if (noside == EVAL_SKIP)
2440 return eval_skip_value (exp);
2441 if (binop_user_defined_p (op, arg1, arg2))
2443 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2447 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2448 tem = value_equal (arg1, arg2);
2449 type = language_bool_type (exp->language_defn, exp->gdbarch);
2450 return value_from_longest (type, (LONGEST) tem);
2453 case BINOP_NOTEQUAL:
2454 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2455 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2456 if (noside == EVAL_SKIP)
2457 return eval_skip_value (exp);
2458 if (binop_user_defined_p (op, arg1, arg2))
2460 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2464 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2465 tem = value_equal (arg1, arg2);
2466 type = language_bool_type (exp->language_defn, exp->gdbarch);
2467 return value_from_longest (type, (LONGEST) ! tem);
2471 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2472 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2473 if (noside == EVAL_SKIP)
2474 return eval_skip_value (exp);
2475 if (binop_user_defined_p (op, arg1, arg2))
2477 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2481 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2482 tem = value_less (arg1, arg2);
2483 type = language_bool_type (exp->language_defn, exp->gdbarch);
2484 return value_from_longest (type, (LONGEST) tem);
2488 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2489 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2490 if (noside == EVAL_SKIP)
2491 return eval_skip_value (exp);
2492 if (binop_user_defined_p (op, arg1, arg2))
2494 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2498 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2499 tem = value_less (arg2, arg1);
2500 type = language_bool_type (exp->language_defn, exp->gdbarch);
2501 return value_from_longest (type, (LONGEST) tem);
2505 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2506 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2507 if (noside == EVAL_SKIP)
2508 return eval_skip_value (exp);
2509 if (binop_user_defined_p (op, arg1, arg2))
2511 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2515 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2516 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
2517 type = language_bool_type (exp->language_defn, exp->gdbarch);
2518 return value_from_longest (type, (LONGEST) tem);
2522 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2523 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
2524 if (noside == EVAL_SKIP)
2525 return eval_skip_value (exp);
2526 if (binop_user_defined_p (op, arg1, arg2))
2528 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
2532 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
2533 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
2534 type = language_bool_type (exp->language_defn, exp->gdbarch);
2535 return value_from_longest (type, (LONGEST) tem);
2539 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2540 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2541 if (noside == EVAL_SKIP)
2542 return eval_skip_value (exp);
2543 type = check_typedef (value_type (arg2));
2544 if (TYPE_CODE (type) != TYPE_CODE_INT
2545 && TYPE_CODE (type) != TYPE_CODE_ENUM)
2546 error (_("Non-integral right operand for \"@\" operator."));
2547 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2549 return allocate_repeat_value (value_type (arg1),
2550 longest_to_int (value_as_long (arg2)));
2553 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
2556 evaluate_subexp (NULL_TYPE, exp, pos, noside);
2557 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2560 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2561 if (noside == EVAL_SKIP)
2562 return eval_skip_value (exp);
2563 if (unop_user_defined_p (op, arg1))
2564 return value_x_unop (arg1, op, noside);
2567 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2568 return value_pos (arg1);
2572 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2573 if (noside == EVAL_SKIP)
2574 return eval_skip_value (exp);
2575 if (unop_user_defined_p (op, arg1))
2576 return value_x_unop (arg1, op, noside);
2579 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2580 return value_neg (arg1);
2583 case UNOP_COMPLEMENT:
2584 /* C++: check for and handle destructor names. */
2586 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2587 if (noside == EVAL_SKIP)
2588 return eval_skip_value (exp);
2589 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
2590 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
2593 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
2594 return value_complement (arg1);
2597 case UNOP_LOGICAL_NOT:
2598 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2599 if (noside == EVAL_SKIP)
2600 return eval_skip_value (exp);
2601 if (unop_user_defined_p (op, arg1))
2602 return value_x_unop (arg1, op, noside);
2605 type = language_bool_type (exp->language_defn, exp->gdbarch);
2606 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
2610 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
2611 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
2612 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2613 type = check_typedef (value_type (arg1));
2614 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2615 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2616 error (_("Attempt to dereference pointer "
2617 "to member without an object"));
2618 if (noside == EVAL_SKIP)
2619 return eval_skip_value (exp);
2620 if (unop_user_defined_p (op, arg1))
2621 return value_x_unop (arg1, op, noside);
2622 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2624 type = check_typedef (value_type (arg1));
2625 if (TYPE_CODE (type) == TYPE_CODE_PTR
2626 || TYPE_IS_REFERENCE (type)
2627 /* In C you can dereference an array to get the 1st elt. */
2628 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2630 return value_zero (TYPE_TARGET_TYPE (type),
2632 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2633 /* GDB allows dereferencing an int. */
2634 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
2637 error (_("Attempt to take contents of a non-pointer value."));
2640 /* Allow * on an integer so we can cast it to whatever we want.
2641 This returns an int, which seems like the most C-like thing to
2642 do. "long long" variables are rare enough that
2643 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2644 if (TYPE_CODE (type) == TYPE_CODE_INT)
2645 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
2646 (CORE_ADDR) value_as_address (arg1));
2647 return value_ind (arg1);
2650 /* C++: check for and handle pointer to members. */
2652 if (noside == EVAL_SKIP)
2654 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2655 return eval_skip_value (exp);
2659 struct value *retvalp = evaluate_subexp_for_address (exp, pos,
2666 if (noside == EVAL_SKIP)
2668 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2669 return eval_skip_value (exp);
2671 return evaluate_subexp_for_sizeof (exp, pos, noside);
2675 type = exp->elts[pc + 1].type;
2676 return evaluate_subexp_for_cast (exp, pos, noside, type);
2678 case UNOP_CAST_TYPE:
2679 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2680 type = value_type (arg1);
2681 return evaluate_subexp_for_cast (exp, pos, noside, type);
2683 case UNOP_DYNAMIC_CAST:
2684 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2685 type = value_type (arg1);
2686 arg1 = evaluate_subexp (type, exp, pos, noside);
2687 if (noside == EVAL_SKIP)
2688 return eval_skip_value (exp);
2689 return value_dynamic_cast (type, arg1);
2691 case UNOP_REINTERPRET_CAST:
2692 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2693 type = value_type (arg1);
2694 arg1 = evaluate_subexp (type, exp, pos, noside);
2695 if (noside == EVAL_SKIP)
2696 return eval_skip_value (exp);
2697 return value_reinterpret_cast (type, arg1);
2701 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2702 if (noside == EVAL_SKIP)
2703 return eval_skip_value (exp);
2704 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2705 return value_zero (exp->elts[pc + 1].type, lval_memory);
2707 return value_at_lazy (exp->elts[pc + 1].type,
2708 value_as_address (arg1));
2710 case UNOP_MEMVAL_TYPE:
2711 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2712 type = value_type (arg1);
2713 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2714 if (noside == EVAL_SKIP)
2715 return eval_skip_value (exp);
2716 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2717 return value_zero (type, lval_memory);
2719 return value_at_lazy (type, value_as_address (arg1));
2721 case UNOP_PREINCREMENT:
2722 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2723 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2725 else if (unop_user_defined_p (op, arg1))
2727 return value_x_unop (arg1, op, noside);
2731 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2732 arg2 = value_ptradd (arg1, 1);
2735 struct value *tmp = arg1;
2737 arg2 = value_one (value_type (arg1));
2738 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2739 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2742 return value_assign (arg1, arg2);
2745 case UNOP_PREDECREMENT:
2746 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2747 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2749 else if (unop_user_defined_p (op, arg1))
2751 return value_x_unop (arg1, op, noside);
2755 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2756 arg2 = value_ptradd (arg1, -1);
2759 struct value *tmp = arg1;
2761 arg2 = value_one (value_type (arg1));
2762 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2763 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2766 return value_assign (arg1, arg2);
2769 case UNOP_POSTINCREMENT:
2770 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2771 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2773 else if (unop_user_defined_p (op, arg1))
2775 return value_x_unop (arg1, op, noside);
2779 arg3 = value_non_lval (arg1);
2781 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2782 arg2 = value_ptradd (arg1, 1);
2785 struct value *tmp = arg1;
2787 arg2 = value_one (value_type (arg1));
2788 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2789 arg2 = value_binop (tmp, arg2, BINOP_ADD);
2792 value_assign (arg1, arg2);
2796 case UNOP_POSTDECREMENT:
2797 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2798 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2800 else if (unop_user_defined_p (op, arg1))
2802 return value_x_unop (arg1, op, noside);
2806 arg3 = value_non_lval (arg1);
2808 if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
2809 arg2 = value_ptradd (arg1, -1);
2812 struct value *tmp = arg1;
2814 arg2 = value_one (value_type (arg1));
2815 binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
2816 arg2 = value_binop (tmp, arg2, BINOP_SUB);
2819 value_assign (arg1, arg2);
2825 return value_of_this (exp->language_defn);
2828 /* The value is not supposed to be used. This is here to make it
2829 easier to accommodate expressions that contain types. */
2831 if (noside == EVAL_SKIP)
2832 return eval_skip_value (exp);
2833 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2834 return allocate_value (exp->elts[pc + 1].type);
2836 error (_("Attempt to use a type name as an expression"));
2840 if (noside == EVAL_SKIP)
2842 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2843 return eval_skip_value (exp);
2845 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2847 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2848 struct value *result;
2850 result = evaluate_subexp (NULL_TYPE, exp, pos,
2851 EVAL_AVOID_SIDE_EFFECTS);
2853 /* 'decltype' has special semantics for lvalues. */
2854 if (op == OP_DECLTYPE
2855 && (sub_op == BINOP_SUBSCRIPT
2856 || sub_op == STRUCTOP_MEMBER
2857 || sub_op == STRUCTOP_MPTR
2858 || sub_op == UNOP_IND
2859 || sub_op == STRUCTOP_STRUCT
2860 || sub_op == STRUCTOP_PTR
2861 || sub_op == OP_SCOPE))
2863 struct type *type = value_type (result);
2865 if (!TYPE_IS_REFERENCE (type))
2867 type = lookup_lvalue_reference_type (type);
2868 result = allocate_value (type);
2875 error (_("Attempt to use a type as an expression"));
2879 struct value *result;
2880 enum exp_opcode sub_op = exp->elts[*pos].opcode;
2882 if (sub_op == OP_TYPE || sub_op == OP_DECLTYPE || sub_op == OP_TYPEOF)
2883 result = evaluate_subexp (NULL_TYPE, exp, pos,
2884 EVAL_AVOID_SIDE_EFFECTS);
2886 result = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2888 if (noside != EVAL_NORMAL)
2889 return allocate_value (cplus_typeid_type (exp->gdbarch));
2891 return cplus_typeid (result);
2895 /* Removing this case and compiling with gcc -Wall reveals that
2896 a lot of cases are hitting this case. Some of these should
2897 probably be removed from expression.h; others are legitimate
2898 expressions which are (apparently) not fully implemented.
2900 If there are any cases landing here which mean a user error,
2901 then they should be separate cases, with more descriptive
2904 error (_("GDB does not (yet) know how to "
2905 "evaluate that kind of expression"));
2908 gdb_assert_not_reached ("missed return?");
2911 /* Evaluate a subexpression of EXP, at index *POS,
2912 and return the address of that subexpression.
2913 Advance *POS over the subexpression.
2914 If the subexpression isn't an lvalue, get an error.
2915 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2916 then only the type of the result need be correct. */
2918 static struct value *
2919 evaluate_subexp_for_address (struct expression *exp, int *pos,
2929 op = exp->elts[pc].opcode;
2935 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2937 /* We can't optimize out "&*" if there's a user-defined operator*. */
2938 if (unop_user_defined_p (op, x))
2940 x = value_x_unop (x, op, noside);
2941 goto default_case_after_eval;
2944 return coerce_array (x);
2948 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2949 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2951 case UNOP_MEMVAL_TYPE:
2956 x = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2957 type = value_type (x);
2958 return value_cast (lookup_pointer_type (type),
2959 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2963 var = exp->elts[pc + 2].symbol;
2965 /* C++: The "address" of a reference should yield the address
2966 * of the object pointed to. Let value_addr() deal with it. */
2967 if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var)))
2971 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2974 lookup_pointer_type (SYMBOL_TYPE (var));
2975 enum address_class sym_class = SYMBOL_CLASS (var);
2977 if (sym_class == LOC_CONST
2978 || sym_class == LOC_CONST_BYTES
2979 || sym_class == LOC_REGISTER)
2980 error (_("Attempt to take address of register or constant."));
2983 value_zero (type, not_lval);
2986 return address_of_variable (var, exp->elts[pc + 1].block);
2988 case OP_VAR_MSYM_VALUE:
2992 value *val = evaluate_var_msym_value (noside,
2993 exp->elts[pc + 1].objfile,
2994 exp->elts[pc + 2].msymbol);
2995 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2997 struct type *type = lookup_pointer_type (value_type (val));
2998 return value_zero (type, not_lval);
3001 return value_addr (val);
3005 tem = longest_to_int (exp->elts[pc + 2].longconst);
3006 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
3007 x = value_aggregate_elt (exp->elts[pc + 1].type,
3008 &exp->elts[pc + 3].string,
3011 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
3016 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
3017 default_case_after_eval:
3018 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3020 struct type *type = check_typedef (value_type (x));
3022 if (TYPE_IS_REFERENCE (type))
3023 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3025 else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
3026 return value_zero (lookup_pointer_type (value_type (x)),
3029 error (_("Attempt to take address of "
3030 "value not located in memory."));
3032 return value_addr (x);
3036 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
3037 When used in contexts where arrays will be coerced anyway, this is
3038 equivalent to `evaluate_subexp' but much faster because it avoids
3039 actually fetching array contents (perhaps obsolete now that we have
3042 Note that we currently only do the coercion for C expressions, where
3043 arrays are zero based and the coercion is correct. For other languages,
3044 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
3045 to decide if coercion is appropriate. */
3048 evaluate_subexp_with_coercion (struct expression *exp,
3049 int *pos, enum noside noside)
3058 op = exp->elts[pc].opcode;
3063 var = exp->elts[pc + 2].symbol;
3064 type = check_typedef (SYMBOL_TYPE (var));
3065 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
3066 && !TYPE_VECTOR (type)
3067 && CAST_IS_CONVERSION (exp->language_defn))
3070 val = address_of_variable (var, exp->elts[pc + 1].block);
3071 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
3077 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
3081 /* Evaluate a subexpression of EXP, at index *POS,
3082 and return a value for the size of that subexpression.
3083 Advance *POS over the subexpression. If NOSIDE is EVAL_NORMAL
3084 we allow side-effects on the operand if its type is a variable
3087 static struct value *
3088 evaluate_subexp_for_sizeof (struct expression *exp, int *pos,
3091 /* FIXME: This should be size_t. */
3092 struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
3099 op = exp->elts[pc].opcode;
3103 /* This case is handled specially
3104 so that we avoid creating a value for the result type.
3105 If the result type is very big, it's desirable not to
3106 create a value unnecessarily. */
3109 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3110 type = check_typedef (value_type (val));
3111 if (TYPE_CODE (type) != TYPE_CODE_PTR
3112 && !TYPE_IS_REFERENCE (type)
3113 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
3114 error (_("Attempt to take contents of a non-pointer value."));
3115 type = TYPE_TARGET_TYPE (type);
3116 if (is_dynamic_type (type))
3117 type = value_type (value_ind (val));
3118 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3122 type = exp->elts[pc + 1].type;
3125 case UNOP_MEMVAL_TYPE:
3127 val = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3128 type = value_type (val);
3132 type = SYMBOL_TYPE (exp->elts[pc + 2].symbol);
3133 if (is_dynamic_type (type))
3135 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3136 type = value_type (val);
3142 case OP_VAR_MSYM_VALUE:
3146 minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
3147 value *val = evaluate_var_msym_value (noside,
3148 exp->elts[pc + 1].objfile,
3151 type = value_type (val);
3152 if (TYPE_CODE (type) == TYPE_CODE_ERROR)
3153 error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
3155 return value_from_longest (size_type, TYPE_LENGTH (type));
3159 /* Deal with the special case if NOSIDE is EVAL_NORMAL and the resulting
3160 type of the subscript is a variable length array type. In this case we
3161 must re-evaluate the right hand side of the subcription to allow
3163 case BINOP_SUBSCRIPT:
3164 if (noside == EVAL_NORMAL)
3166 int pc = (*pos) + 1;
3168 val = evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
3169 type = check_typedef (value_type (val));
3170 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3172 type = check_typedef (TYPE_TARGET_TYPE (type));
3173 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3175 type = TYPE_INDEX_TYPE (type);
3176 /* Only re-evaluate the right hand side if the resulting type
3177 is a variable length type. */
3178 if (TYPE_RANGE_DATA (type)->flag_bound_evaluated)
3180 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
3181 return value_from_longest
3182 (size_type, (LONGEST) TYPE_LENGTH (value_type (val)));
3191 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
3192 type = value_type (val);
3196 /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof:
3197 "When applied to a reference or a reference type, the result is
3198 the size of the referenced type." */
3199 type = check_typedef (type);
3200 if (exp->language_defn->la_language == language_cplus
3201 && (TYPE_IS_REFERENCE (type)))
3202 type = check_typedef (TYPE_TARGET_TYPE (type));
3203 return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
3206 /* Evaluate a subexpression of EXP, at index *POS, and return a value
3207 for that subexpression cast to TO_TYPE. Advance *POS over the
3211 evaluate_subexp_for_cast (expression *exp, int *pos,
3213 struct type *to_type)
3217 /* Don't let symbols be evaluated with evaluate_subexp because that
3218 throws an "unknown type" error for no-debug data symbols.
3219 Instead, we want the cast to reinterpret the symbol. */
3220 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE
3221 || exp->elts[pc].opcode == OP_VAR_VALUE)
3226 if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE)
3228 if (noside == EVAL_AVOID_SIDE_EFFECTS)
3229 return value_zero (to_type, not_lval);
3231 val = evaluate_var_msym_value (noside,
3232 exp->elts[pc + 1].objfile,
3233 exp->elts[pc + 2].msymbol);
3236 val = evaluate_var_value (noside,
3237 exp->elts[pc + 1].block,
3238 exp->elts[pc + 2].symbol);
3240 if (noside == EVAL_SKIP)
3241 return eval_skip_value (exp);
3243 val = value_cast (to_type, val);
3245 /* Don't allow e.g. '&(int)var_with_no_debug_info'. */
3246 if (VALUE_LVAL (val) == lval_memory)
3248 if (value_lazy (val))
3249 value_fetch_lazy (val);
3250 VALUE_LVAL (val) = not_lval;
3255 value *val = evaluate_subexp (to_type, exp, pos, noside);
3256 if (noside == EVAL_SKIP)
3257 return eval_skip_value (exp);
3258 return value_cast (to_type, val);
3261 /* Parse a type expression in the string [P..P+LENGTH). */
3264 parse_and_eval_type (char *p, int length)
3266 char *tmp = (char *) alloca (length + 4);
3269 memcpy (tmp + 1, p, length);
3270 tmp[length + 1] = ')';
3271 tmp[length + 2] = '0';
3272 tmp[length + 3] = '\0';
3273 expression_up expr = parse_expression (tmp);
3274 if (expr->elts[0].opcode != UNOP_CAST)
3275 error (_("Internal error in eval_type."));
3276 return expr->elts[1].type;
3280 calc_f77_array_dims (struct type *array_type)
3283 struct type *tmp_type;
3285 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
3286 error (_("Can't get dimensions for a non-array type"));
3288 tmp_type = array_type;
3290 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
3292 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)