1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008,
5 2009, 2010, 2011 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
27 #include "expression.h"
30 #include "language.h" /* For CAST_IS_CONVERSION. */
31 #include "f-lang.h" /* For array bound stuff. */
34 #include "objc-lang.h"
36 #include "parser-defs.h"
37 #include "cp-support.h"
39 #include "exceptions.h"
41 #include "user-regs.h"
43 #include "gdb_obstack.h"
45 #include "python/python.h"
48 #include "gdb_assert.h"
52 /* This is defined in valops.c */
53 extern int overload_resolution
;
55 /* Prototypes for local functions. */
57 static struct value
*evaluate_subexp_for_sizeof (struct expression
*, int *);
59 static struct value
*evaluate_subexp_for_address (struct expression
*,
62 static char *get_label (struct expression
*, int *);
64 static struct value
*evaluate_struct_tuple (struct value
*,
65 struct expression
*, int *,
68 static LONGEST
init_array_element (struct value
*, struct value
*,
69 struct expression
*, int *, enum noside
,
73 evaluate_subexp (struct type
*expect_type
, struct expression
*exp
,
74 int *pos
, enum noside noside
)
76 return (*exp
->language_defn
->la_exp_desc
->evaluate_exp
)
77 (expect_type
, exp
, pos
, noside
);
80 /* Parse the string EXP as a C expression, evaluate it,
81 and return the result as a number. */
84 parse_and_eval_address (char *exp
)
86 struct expression
*expr
= parse_expression (exp
);
88 struct cleanup
*old_chain
=
89 make_cleanup (free_current_contents
, &expr
);
91 addr
= value_as_address (evaluate_expression (expr
));
92 do_cleanups (old_chain
);
96 /* Like parse_and_eval_address but takes a pointer to a char * variable
97 and advanced that variable across the characters parsed. */
100 parse_and_eval_address_1 (char **expptr
)
102 struct expression
*expr
= parse_exp_1 (expptr
, (struct block
*) 0, 0);
104 struct cleanup
*old_chain
=
105 make_cleanup (free_current_contents
, &expr
);
107 addr
= value_as_address (evaluate_expression (expr
));
108 do_cleanups (old_chain
);
112 /* Like parse_and_eval_address, but treats the value of the expression
113 as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
115 parse_and_eval_long (char *exp
)
117 struct expression
*expr
= parse_expression (exp
);
119 struct cleanup
*old_chain
=
120 make_cleanup (free_current_contents
, &expr
);
122 retval
= value_as_long (evaluate_expression (expr
));
123 do_cleanups (old_chain
);
128 parse_and_eval (char *exp
)
130 struct expression
*expr
= parse_expression (exp
);
132 struct cleanup
*old_chain
=
133 make_cleanup (free_current_contents
, &expr
);
135 val
= evaluate_expression (expr
);
136 do_cleanups (old_chain
);
140 /* Parse up to a comma (or to a closeparen)
141 in the string EXPP as an expression, evaluate it, and return the value.
142 EXPP is advanced to point to the comma. */
145 parse_to_comma_and_eval (char **expp
)
147 struct expression
*expr
= parse_exp_1 (expp
, (struct block
*) 0, 1);
149 struct cleanup
*old_chain
=
150 make_cleanup (free_current_contents
, &expr
);
152 val
= evaluate_expression (expr
);
153 do_cleanups (old_chain
);
157 /* Evaluate an expression in internal prefix form
158 such as is constructed by parse.y.
160 See expression.h for info on the format of an expression. */
163 evaluate_expression (struct expression
*exp
)
167 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_NORMAL
);
170 /* Evaluate an expression, avoiding all memory references
171 and getting a value whose type alone is correct. */
174 evaluate_type (struct expression
*exp
)
178 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_AVOID_SIDE_EFFECTS
);
181 /* Evaluate a subexpression, avoiding all memory references and
182 getting a value whose type alone is correct. */
185 evaluate_subexpression_type (struct expression
*exp
, int subexp
)
187 return evaluate_subexp (NULL_TYPE
, exp
, &subexp
, EVAL_AVOID_SIDE_EFFECTS
);
190 /* Find the current value of a watchpoint on EXP. Return the value in
191 *VALP and *RESULTP and the chain of intermediate and final values
192 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
195 If a memory error occurs while evaluating the expression, *RESULTP will
196 be set to NULL. *RESULTP may be a lazy value, if the result could
197 not be read from memory. It is used to determine whether a value
198 is user-specified (we should watch the whole value) or intermediate
199 (we should watch only the bit used to locate the final value).
201 If the final value, or any intermediate value, could not be read
202 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
203 set to any referenced values. *VALP will never be a lazy value.
204 This is the value which we store in struct breakpoint.
206 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
207 value chain. The caller must free the values individually. If
208 VAL_CHAIN is NULL, all generated values will be left on the value
212 fetch_subexp_value (struct expression
*exp
, int *pc
, struct value
**valp
,
213 struct value
**resultp
, struct value
**val_chain
)
215 struct value
*mark
, *new_mark
, *result
;
216 volatile struct gdb_exception ex
;
224 /* Evaluate the expression. */
225 mark
= value_mark ();
228 TRY_CATCH (ex
, RETURN_MASK_ALL
)
230 result
= evaluate_subexp (NULL_TYPE
, exp
, pc
, EVAL_NORMAL
);
234 /* Ignore memory errors, we want watchpoints pointing at
235 inaccessible memory to still be created; otherwise, throw the
236 error to some higher catcher. */
242 throw_exception (ex
);
247 new_mark
= value_mark ();
248 if (mark
== new_mark
)
253 /* Make sure it's not lazy, so that after the target stops again we
254 have a non-lazy previous value to compare with. */
256 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
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 /* If the next expression is an OP_LABELED, skips past it,
291 returning the label. Otherwise, does nothing and returns NULL. */
294 get_label (struct expression
*exp
, int *pos
)
296 if (exp
->elts
[*pos
].opcode
== OP_LABELED
)
299 char *name
= &exp
->elts
[pc
+ 2].string
;
300 int tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
302 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
309 /* This function evaluates tuples (in (the deleted) Chill) or
310 brace-initializers (in C/C++) for structure types. */
312 static struct value
*
313 evaluate_struct_tuple (struct value
*struct_val
,
314 struct expression
*exp
,
315 int *pos
, enum noside noside
, int nargs
)
317 struct type
*struct_type
= check_typedef (value_type (struct_val
));
318 struct type
*substruct_type
= struct_type
;
319 struct type
*field_type
;
327 struct value
*val
= NULL
;
332 /* Skip past the labels, and count them. */
333 while (get_label (exp
, pos
) != NULL
)
338 char *label
= get_label (exp
, &pc
);
342 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
345 char *field_name
= TYPE_FIELD_NAME (struct_type
, fieldno
);
347 if (field_name
!= NULL
&& strcmp (field_name
, label
) == 0)
350 subfieldno
= fieldno
;
351 substruct_type
= struct_type
;
355 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
358 char *field_name
= TYPE_FIELD_NAME (struct_type
, fieldno
);
360 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
361 if ((field_name
== 0 || *field_name
== '\0')
362 && TYPE_CODE (field_type
) == TYPE_CODE_UNION
)
365 for (; variantno
< TYPE_NFIELDS (field_type
);
369 = TYPE_FIELD_TYPE (field_type
, variantno
);
370 if (TYPE_CODE (substruct_type
) == TYPE_CODE_STRUCT
)
373 subfieldno
< TYPE_NFIELDS (substruct_type
);
376 if (strcmp(TYPE_FIELD_NAME (substruct_type
,
387 error (_("there is no field named %s"), label
);
393 /* Unlabelled tuple element - go to next field. */
397 if (subfieldno
>= TYPE_NFIELDS (substruct_type
))
400 substruct_type
= struct_type
;
406 /* Skip static fields. */
407 while (fieldno
< TYPE_NFIELDS (struct_type
)
408 && field_is_static (&TYPE_FIELD (struct_type
,
411 subfieldno
= fieldno
;
412 if (fieldno
>= TYPE_NFIELDS (struct_type
))
413 error (_("too many initializers"));
414 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
415 if (TYPE_CODE (field_type
) == TYPE_CODE_UNION
416 && TYPE_FIELD_NAME (struct_type
, fieldno
)[0] == '0')
417 error (_("don't know which variant you want to set"));
421 /* Here, struct_type is the type of the inner struct,
422 while substruct_type is the type of the inner struct.
423 These are the same for normal structures, but a variant struct
424 contains anonymous union fields that contain substruct fields.
425 The value fieldno is the index of the top-level (normal or
426 anonymous union) field in struct_field, while the value
427 subfieldno is the index of the actual real (named inner) field
428 in substruct_type. */
430 field_type
= TYPE_FIELD_TYPE (substruct_type
, subfieldno
);
432 val
= evaluate_subexp (field_type
, exp
, pos
, noside
);
434 /* Now actually set the field in struct_val. */
436 /* Assign val to field fieldno. */
437 if (value_type (val
) != field_type
)
438 val
= value_cast (field_type
, val
);
440 bitsize
= TYPE_FIELD_BITSIZE (substruct_type
, subfieldno
);
441 bitpos
= TYPE_FIELD_BITPOS (struct_type
, fieldno
);
443 bitpos
+= TYPE_FIELD_BITPOS (substruct_type
, subfieldno
);
444 addr
= value_contents_writeable (struct_val
) + bitpos
/ 8;
446 modify_field (struct_type
, addr
,
447 value_as_long (val
), bitpos
% 8, bitsize
);
449 memcpy (addr
, value_contents (val
),
450 TYPE_LENGTH (value_type (val
)));
452 while (--nlabels
> 0);
457 /* Recursive helper function for setting elements of array tuples for
458 (the deleted) Chill. The target is ARRAY (which has bounds
459 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
460 and NOSIDE are as usual. Evaluates index expresions and sets the
461 specified element(s) of ARRAY to ELEMENT. Returns last index
465 init_array_element (struct value
*array
, struct value
*element
,
466 struct expression
*exp
, int *pos
,
467 enum noside noside
, LONGEST low_bound
, LONGEST high_bound
)
470 int element_size
= TYPE_LENGTH (value_type (element
));
472 if (exp
->elts
[*pos
].opcode
== BINOP_COMMA
)
475 init_array_element (array
, element
, exp
, pos
, noside
,
476 low_bound
, high_bound
);
477 return init_array_element (array
, element
,
478 exp
, pos
, noside
, low_bound
, high_bound
);
480 else if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
485 low
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
486 high
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
487 if (low
< low_bound
|| high
> high_bound
)
488 error (_("tuple range index out of range"));
489 for (index
= low
; index
<= high
; index
++)
491 memcpy (value_contents_raw (array
)
492 + (index
- low_bound
) * element_size
,
493 value_contents (element
), element_size
);
498 index
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
499 if (index
< low_bound
|| index
> high_bound
)
500 error (_("tuple index out of range"));
501 memcpy (value_contents_raw (array
) + (index
- low_bound
) * element_size
,
502 value_contents (element
), element_size
);
507 static struct value
*
508 value_f90_subarray (struct value
*array
,
509 struct expression
*exp
, int *pos
, enum noside noside
)
512 LONGEST low_bound
, high_bound
;
513 struct type
*range
= check_typedef (TYPE_INDEX_TYPE (value_type (array
)));
514 enum f90_range_type range_type
= longest_to_int (exp
->elts
[pc
].longconst
);
518 if (range_type
== LOW_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
519 low_bound
= TYPE_LOW_BOUND (range
);
521 low_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
523 if (range_type
== HIGH_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
524 high_bound
= TYPE_HIGH_BOUND (range
);
526 high_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
528 return value_slice (array
, low_bound
, high_bound
- low_bound
+ 1);
532 /* Promote value ARG1 as appropriate before performing a unary operation
534 If the result is not appropriate for any particular language then it
535 needs to patch this function. */
538 unop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
543 *arg1
= coerce_ref (*arg1
);
544 type1
= check_typedef (value_type (*arg1
));
546 if (is_integral_type (type1
))
548 switch (language
->la_language
)
551 /* Perform integral promotion for ANSI C/C++.
552 If not appropropriate for any particular language
553 it needs to modify this function. */
555 struct type
*builtin_int
= builtin_type (gdbarch
)->builtin_int
;
557 if (TYPE_LENGTH (type1
) < TYPE_LENGTH (builtin_int
))
558 *arg1
= value_cast (builtin_int
, *arg1
);
565 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
566 operation on those two operands.
567 If the result is not appropriate for any particular language then it
568 needs to patch this function. */
571 binop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
572 struct value
**arg1
, struct value
**arg2
)
574 struct type
*promoted_type
= NULL
;
578 *arg1
= coerce_ref (*arg1
);
579 *arg2
= coerce_ref (*arg2
);
581 type1
= check_typedef (value_type (*arg1
));
582 type2
= check_typedef (value_type (*arg2
));
584 if ((TYPE_CODE (type1
) != TYPE_CODE_FLT
585 && TYPE_CODE (type1
) != TYPE_CODE_DECFLOAT
586 && !is_integral_type (type1
))
587 || (TYPE_CODE (type2
) != TYPE_CODE_FLT
588 && TYPE_CODE (type2
) != TYPE_CODE_DECFLOAT
589 && !is_integral_type (type2
)))
592 if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
593 || TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
)
595 /* No promotion required. */
597 else if (TYPE_CODE (type1
) == TYPE_CODE_FLT
598 || TYPE_CODE (type2
) == TYPE_CODE_FLT
)
600 switch (language
->la_language
)
606 case language_opencl
:
607 /* No promotion required. */
611 /* For other languages the result type is unchanged from gdb
612 version 6.7 for backward compatibility.
613 If either arg was long double, make sure that value is also long
614 double. Otherwise use double. */
615 if (TYPE_LENGTH (type1
) * 8 > gdbarch_double_bit (gdbarch
)
616 || TYPE_LENGTH (type2
) * 8 > gdbarch_double_bit (gdbarch
))
617 promoted_type
= builtin_type (gdbarch
)->builtin_long_double
;
619 promoted_type
= builtin_type (gdbarch
)->builtin_double
;
623 else if (TYPE_CODE (type1
) == TYPE_CODE_BOOL
624 && TYPE_CODE (type2
) == TYPE_CODE_BOOL
)
626 /* No promotion required. */
629 /* Integral operations here. */
630 /* FIXME: Also mixed integral/booleans, with result an integer. */
632 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
633 unsigned int promoted_len1
= TYPE_LENGTH (type1
);
634 unsigned int promoted_len2
= TYPE_LENGTH (type2
);
635 int is_unsigned1
= TYPE_UNSIGNED (type1
);
636 int is_unsigned2
= TYPE_UNSIGNED (type2
);
637 unsigned int result_len
;
638 int unsigned_operation
;
640 /* Determine type length and signedness after promotion for
642 if (promoted_len1
< TYPE_LENGTH (builtin
->builtin_int
))
645 promoted_len1
= TYPE_LENGTH (builtin
->builtin_int
);
647 if (promoted_len2
< TYPE_LENGTH (builtin
->builtin_int
))
650 promoted_len2
= TYPE_LENGTH (builtin
->builtin_int
);
653 if (promoted_len1
> promoted_len2
)
655 unsigned_operation
= is_unsigned1
;
656 result_len
= promoted_len1
;
658 else if (promoted_len2
> promoted_len1
)
660 unsigned_operation
= is_unsigned2
;
661 result_len
= promoted_len2
;
665 unsigned_operation
= is_unsigned1
|| is_unsigned2
;
666 result_len
= promoted_len1
;
669 switch (language
->la_language
)
675 if (result_len
<= TYPE_LENGTH (builtin
->builtin_int
))
677 promoted_type
= (unsigned_operation
678 ? builtin
->builtin_unsigned_int
679 : builtin
->builtin_int
);
681 else if (result_len
<= TYPE_LENGTH (builtin
->builtin_long
))
683 promoted_type
= (unsigned_operation
684 ? builtin
->builtin_unsigned_long
685 : builtin
->builtin_long
);
689 promoted_type
= (unsigned_operation
690 ? builtin
->builtin_unsigned_long_long
691 : builtin
->builtin_long_long
);
694 case language_opencl
:
695 if (result_len
<= TYPE_LENGTH (lookup_signed_typename
696 (language
, gdbarch
, "int")))
700 ? lookup_unsigned_typename (language
, gdbarch
, "int")
701 : lookup_signed_typename (language
, gdbarch
, "int"));
703 else if (result_len
<= TYPE_LENGTH (lookup_signed_typename
704 (language
, gdbarch
, "long")))
708 ? lookup_unsigned_typename (language
, gdbarch
, "long")
709 : lookup_signed_typename (language
, gdbarch
,"long"));
713 /* For other languages the result type is unchanged from gdb
714 version 6.7 for backward compatibility.
715 If either arg was long long, make sure that value is also long
716 long. Otherwise use long. */
717 if (unsigned_operation
)
719 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
720 promoted_type
= builtin
->builtin_unsigned_long_long
;
722 promoted_type
= builtin
->builtin_unsigned_long
;
726 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
727 promoted_type
= builtin
->builtin_long_long
;
729 promoted_type
= builtin
->builtin_long
;
737 /* Promote both operands to common type. */
738 *arg1
= value_cast (promoted_type
, *arg1
);
739 *arg2
= value_cast (promoted_type
, *arg2
);
744 ptrmath_type_p (const struct language_defn
*lang
, struct type
*type
)
746 type
= check_typedef (type
);
747 if (TYPE_CODE (type
) == TYPE_CODE_REF
)
748 type
= TYPE_TARGET_TYPE (type
);
750 switch (TYPE_CODE (type
))
756 case TYPE_CODE_ARRAY
:
757 return TYPE_VECTOR (type
) ? 0 : lang
->c_style_arrays
;
764 /* Constructs a fake method with the given parameter types.
765 This function is used by the parser to construct an "expected"
766 type for method overload resolution. */
769 make_params (int num_types
, struct type
**param_types
)
771 struct type
*type
= XZALLOC (struct type
);
772 TYPE_MAIN_TYPE (type
) = XZALLOC (struct main_type
);
773 TYPE_LENGTH (type
) = 1;
774 TYPE_CODE (type
) = TYPE_CODE_METHOD
;
775 TYPE_VPTR_FIELDNO (type
) = -1;
776 TYPE_CHAIN (type
) = type
;
777 TYPE_NFIELDS (type
) = num_types
;
778 TYPE_FIELDS (type
) = (struct field
*)
779 TYPE_ZALLOC (type
, sizeof (struct field
) * num_types
);
781 while (num_types
-- > 0)
782 TYPE_FIELD_TYPE (type
, num_types
) = param_types
[num_types
];
788 evaluate_subexp_standard (struct type
*expect_type
,
789 struct expression
*exp
, int *pos
,
794 int pc
, pc2
= 0, oldpos
;
795 struct value
*arg1
= NULL
;
796 struct value
*arg2
= NULL
;
800 struct value
**argvec
;
805 struct type
**arg_types
;
807 struct symbol
*function
= NULL
;
808 char *function_name
= NULL
;
811 op
= exp
->elts
[pc
].opcode
;
816 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
817 (*pos
) += 4 + BYTES_TO_EXP_ELEM (tem
+ 1);
818 if (noside
== EVAL_SKIP
)
820 arg1
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
821 &exp
->elts
[pc
+ 3].string
,
822 expect_type
, 0, noside
);
824 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
829 return value_from_longest (exp
->elts
[pc
+ 1].type
,
830 exp
->elts
[pc
+ 2].longconst
);
834 return value_from_double (exp
->elts
[pc
+ 1].type
,
835 exp
->elts
[pc
+ 2].doubleconst
);
839 return value_from_decfloat (exp
->elts
[pc
+ 1].type
,
840 exp
->elts
[pc
+ 2].decfloatconst
);
845 if (noside
== EVAL_SKIP
)
848 /* JYG: We used to just return value_zero of the symbol type
849 if we're asked to avoid side effects. Otherwise we return
850 value_of_variable (...). However I'm not sure if
851 value_of_variable () has any side effect.
852 We need a full value object returned here for whatis_exp ()
853 to call evaluate_type () and then pass the full value to
854 value_rtti_target_type () if we are dealing with a pointer
855 or reference to a base class and print object is on. */
858 volatile struct gdb_exception except
;
859 struct value
*ret
= NULL
;
861 TRY_CATCH (except
, RETURN_MASK_ERROR
)
863 ret
= value_of_variable (exp
->elts
[pc
+ 2].symbol
,
864 exp
->elts
[pc
+ 1].block
);
867 if (except
.reason
< 0)
869 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
870 ret
= value_zero (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
),
873 throw_exception (except
);
882 access_value_history (longest_to_int (exp
->elts
[pc
+ 1].longconst
));
886 const char *name
= &exp
->elts
[pc
+ 2].string
;
890 (*pos
) += 3 + BYTES_TO_EXP_ELEM (exp
->elts
[pc
+ 1].longconst
+ 1);
891 regno
= user_reg_map_name_to_regnum (exp
->gdbarch
,
892 name
, strlen (name
));
894 error (_("Register $%s not available."), name
);
896 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
897 a value with the appropriate register type. Unfortunately,
898 we don't have easy access to the type of user registers.
899 So for these registers, we fetch the register value regardless
900 of the evaluation mode. */
901 if (noside
== EVAL_AVOID_SIDE_EFFECTS
902 && regno
< gdbarch_num_regs (exp
->gdbarch
)
903 + gdbarch_num_pseudo_regs (exp
->gdbarch
))
904 val
= value_zero (register_type (exp
->gdbarch
, regno
), not_lval
);
906 val
= value_of_register (regno
, get_selected_frame (NULL
));
908 error (_("Value of register %s not available."), name
);
914 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
915 return value_from_longest (type
, exp
->elts
[pc
+ 1].longconst
);
919 return value_of_internalvar (exp
->gdbarch
,
920 exp
->elts
[pc
+ 1].internalvar
);
923 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
924 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
925 if (noside
== EVAL_SKIP
)
927 type
= language_string_char_type (exp
->language_defn
, exp
->gdbarch
);
928 return value_string (&exp
->elts
[pc
+ 2].string
, tem
, type
);
930 case OP_OBJC_NSSTRING
: /* Objective C Foundation Class
931 NSString constant. */
932 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
933 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
934 if (noside
== EVAL_SKIP
)
938 return value_nsstring (exp
->gdbarch
, &exp
->elts
[pc
+ 2].string
, tem
+ 1);
941 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
943 += 3 + BYTES_TO_EXP_ELEM ((tem
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
);
944 if (noside
== EVAL_SKIP
)
946 return value_bitstring (&exp
->elts
[pc
+ 2].string
, tem
,
947 builtin_type (exp
->gdbarch
)->builtin_int
);
952 tem2
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
953 tem3
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
954 nargs
= tem3
- tem2
+ 1;
955 type
= expect_type
? check_typedef (expect_type
) : NULL_TYPE
;
957 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
958 && TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
960 struct value
*rec
= allocate_value (expect_type
);
962 memset (value_contents_raw (rec
), '\0', TYPE_LENGTH (type
));
963 return evaluate_struct_tuple (rec
, exp
, pos
, noside
, nargs
);
966 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
967 && TYPE_CODE (type
) == TYPE_CODE_ARRAY
)
969 struct type
*range_type
= TYPE_INDEX_TYPE (type
);
970 struct type
*element_type
= TYPE_TARGET_TYPE (type
);
971 struct value
*array
= allocate_value (expect_type
);
972 int element_size
= TYPE_LENGTH (check_typedef (element_type
));
973 LONGEST low_bound
, high_bound
, index
;
975 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
978 high_bound
= (TYPE_LENGTH (type
) / element_size
) - 1;
981 memset (value_contents_raw (array
), 0, TYPE_LENGTH (expect_type
));
982 for (tem
= nargs
; --nargs
>= 0;)
984 struct value
*element
;
987 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
990 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
992 element
= evaluate_subexp (element_type
, exp
, pos
, noside
);
993 if (value_type (element
) != element_type
)
994 element
= value_cast (element_type
, element
);
997 int continue_pc
= *pos
;
1000 index
= init_array_element (array
, element
, exp
, pos
, noside
,
1001 low_bound
, high_bound
);
1006 if (index
> high_bound
)
1007 /* To avoid memory corruption. */
1008 error (_("Too many array elements"));
1009 memcpy (value_contents_raw (array
)
1010 + (index
- low_bound
) * element_size
,
1011 value_contents (element
),
1019 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
1020 && TYPE_CODE (type
) == TYPE_CODE_SET
)
1022 struct value
*set
= allocate_value (expect_type
);
1023 gdb_byte
*valaddr
= value_contents_raw (set
);
1024 struct type
*element_type
= TYPE_INDEX_TYPE (type
);
1025 struct type
*check_type
= element_type
;
1026 LONGEST low_bound
, high_bound
;
1028 /* Get targettype of elementtype. */
1029 while (TYPE_CODE (check_type
) == TYPE_CODE_RANGE
1030 || TYPE_CODE (check_type
) == TYPE_CODE_TYPEDEF
)
1031 check_type
= TYPE_TARGET_TYPE (check_type
);
1033 if (get_discrete_bounds (element_type
, &low_bound
, &high_bound
) < 0)
1034 error (_("(power)set type with unknown size"));
1035 memset (valaddr
, '\0', TYPE_LENGTH (type
));
1036 for (tem
= 0; tem
< nargs
; tem
++)
1038 LONGEST range_low
, range_high
;
1039 struct type
*range_low_type
, *range_high_type
;
1040 struct value
*elem_val
;
1042 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
1045 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1046 range_low_type
= value_type (elem_val
);
1047 range_low
= value_as_long (elem_val
);
1048 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1049 range_high_type
= value_type (elem_val
);
1050 range_high
= value_as_long (elem_val
);
1054 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
1055 range_low_type
= range_high_type
= value_type (elem_val
);
1056 range_low
= range_high
= value_as_long (elem_val
);
1058 /* Check types of elements to avoid mixture of elements from
1059 different types. Also check if type of element is "compatible"
1060 with element type of powerset. */
1061 if (TYPE_CODE (range_low_type
) == TYPE_CODE_RANGE
)
1062 range_low_type
= TYPE_TARGET_TYPE (range_low_type
);
1063 if (TYPE_CODE (range_high_type
) == TYPE_CODE_RANGE
)
1064 range_high_type
= TYPE_TARGET_TYPE (range_high_type
);
1065 if ((TYPE_CODE (range_low_type
) != TYPE_CODE (range_high_type
))
1066 || (TYPE_CODE (range_low_type
) == TYPE_CODE_ENUM
1067 && (range_low_type
!= range_high_type
)))
1068 /* different element modes. */
1069 error (_("POWERSET tuple elements of different mode"));
1070 if ((TYPE_CODE (check_type
) != TYPE_CODE (range_low_type
))
1071 || (TYPE_CODE (check_type
) == TYPE_CODE_ENUM
1072 && range_low_type
!= check_type
))
1073 error (_("incompatible POWERSET tuple elements"));
1074 if (range_low
> range_high
)
1076 warning (_("empty POWERSET tuple range"));
1079 if (range_low
< low_bound
|| range_high
> high_bound
)
1080 error (_("POWERSET tuple element out of range"));
1081 range_low
-= low_bound
;
1082 range_high
-= low_bound
;
1083 for (; range_low
<= range_high
; range_low
++)
1085 int bit_index
= (unsigned) range_low
% TARGET_CHAR_BIT
;
1087 if (gdbarch_bits_big_endian (exp
->gdbarch
))
1088 bit_index
= TARGET_CHAR_BIT
- 1 - bit_index
;
1089 valaddr
[(unsigned) range_low
/ TARGET_CHAR_BIT
]
1096 argvec
= (struct value
**) alloca (sizeof (struct value
*) * nargs
);
1097 for (tem
= 0; tem
< nargs
; tem
++)
1099 /* Ensure that array expressions are coerced into pointer
1101 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1103 if (noside
== EVAL_SKIP
)
1105 return value_array (tem2
, tem3
, argvec
);
1109 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1111 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1113 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1115 if (noside
== EVAL_SKIP
)
1117 return value_slice (array
, lowbound
, upper
- lowbound
+ 1);
1120 case TERNOP_SLICE_COUNT
:
1122 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1124 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1126 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
1128 return value_slice (array
, lowbound
, length
);
1132 /* Skip third and second args to evaluate the first one. */
1133 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1134 if (value_logical_not (arg1
))
1136 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
1137 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1141 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1142 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
1146 case OP_OBJC_SELECTOR
:
1147 { /* Objective C @selector operator. */
1148 char *sel
= &exp
->elts
[pc
+ 2].string
;
1149 int len
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1150 struct type
*selector_type
;
1152 (*pos
) += 3 + BYTES_TO_EXP_ELEM (len
+ 1);
1153 if (noside
== EVAL_SKIP
)
1157 sel
[len
] = 0; /* Make sure it's terminated. */
1159 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1160 return value_from_longest (selector_type
,
1161 lookup_child_selector (exp
->gdbarch
, sel
));
1164 case OP_OBJC_MSGCALL
:
1165 { /* Objective C message (method) call. */
1167 CORE_ADDR responds_selector
= 0;
1168 CORE_ADDR method_selector
= 0;
1170 CORE_ADDR selector
= 0;
1172 int struct_return
= 0;
1173 int sub_no_side
= 0;
1175 struct value
*msg_send
= NULL
;
1176 struct value
*msg_send_stret
= NULL
;
1177 int gnu_runtime
= 0;
1179 struct value
*target
= NULL
;
1180 struct value
*method
= NULL
;
1181 struct value
*called_method
= NULL
;
1183 struct type
*selector_type
= NULL
;
1184 struct type
*long_type
;
1186 struct value
*ret
= NULL
;
1189 selector
= exp
->elts
[pc
+ 1].longconst
;
1190 nargs
= exp
->elts
[pc
+ 2].longconst
;
1191 argvec
= (struct value
**) alloca (sizeof (struct value
*)
1196 long_type
= builtin_type (exp
->gdbarch
)->builtin_long
;
1197 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1199 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1200 sub_no_side
= EVAL_NORMAL
;
1202 sub_no_side
= noside
;
1204 target
= evaluate_subexp (selector_type
, exp
, pos
, sub_no_side
);
1206 if (value_as_long (target
) == 0)
1207 return value_from_longest (long_type
, 0);
1209 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1212 /* Find the method dispatch (Apple runtime) or method lookup
1213 (GNU runtime) function for Objective-C. These will be used
1214 to lookup the symbol information for the method. If we
1215 can't find any symbol information, then we'll use these to
1216 call the method, otherwise we can call the method
1217 directly. The msg_send_stret function is used in the special
1218 case of a method that returns a structure (Apple runtime
1222 struct type
*type
= selector_type
;
1224 type
= lookup_function_type (type
);
1225 type
= lookup_pointer_type (type
);
1226 type
= lookup_function_type (type
);
1227 type
= lookup_pointer_type (type
);
1229 msg_send
= find_function_in_inferior ("objc_msg_lookup", NULL
);
1231 = find_function_in_inferior ("objc_msg_lookup", NULL
);
1233 msg_send
= value_from_pointer (type
, value_as_address (msg_send
));
1234 msg_send_stret
= value_from_pointer (type
,
1235 value_as_address (msg_send_stret
));
1239 msg_send
= find_function_in_inferior ("objc_msgSend", NULL
);
1240 /* Special dispatcher for methods returning structs. */
1242 = find_function_in_inferior ("objc_msgSend_stret", NULL
);
1245 /* Verify the target object responds to this method. The
1246 standard top-level 'Object' class uses a different name for
1247 the verification method than the non-standard, but more
1248 often used, 'NSObject' class. Make sure we check for both. */
1251 = lookup_child_selector (exp
->gdbarch
, "respondsToSelector:");
1252 if (responds_selector
== 0)
1254 = lookup_child_selector (exp
->gdbarch
, "respondsTo:");
1256 if (responds_selector
== 0)
1257 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1260 = lookup_child_selector (exp
->gdbarch
, "methodForSelector:");
1261 if (method_selector
== 0)
1263 = lookup_child_selector (exp
->gdbarch
, "methodFor:");
1265 if (method_selector
== 0)
1266 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1268 /* Call the verification method, to make sure that the target
1269 class implements the desired method. */
1271 argvec
[0] = msg_send
;
1273 argvec
[2] = value_from_longest (long_type
, responds_selector
);
1274 argvec
[3] = value_from_longest (long_type
, selector
);
1277 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1280 /* Function objc_msg_lookup returns a pointer. */
1282 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1284 if (value_as_long (ret
) == 0)
1285 error (_("Target does not respond to this message selector."));
1287 /* Call "methodForSelector:" method, to get the address of a
1288 function method that implements this selector for this
1289 class. If we can find a symbol at that address, then we
1290 know the return type, parameter types etc. (that's a good
1293 argvec
[0] = msg_send
;
1295 argvec
[2] = value_from_longest (long_type
, method_selector
);
1296 argvec
[3] = value_from_longest (long_type
, selector
);
1299 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1303 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1306 /* ret should now be the selector. */
1308 addr
= value_as_long (ret
);
1311 struct symbol
*sym
= NULL
;
1313 /* The address might point to a function descriptor;
1314 resolve it to the actual code address instead. */
1315 addr
= gdbarch_convert_from_func_ptr_addr (exp
->gdbarch
, addr
,
1318 /* Is it a high_level symbol? */
1319 sym
= find_pc_function (addr
);
1321 method
= value_of_variable (sym
, 0);
1324 /* If we found a method with symbol information, check to see
1325 if it returns a struct. Otherwise assume it doesn't. */
1330 struct type
*val_type
;
1332 funaddr
= find_function_addr (method
, &val_type
);
1334 block_for_pc (funaddr
);
1336 CHECK_TYPEDEF (val_type
);
1338 if ((val_type
== NULL
)
1339 || (TYPE_CODE(val_type
) == TYPE_CODE_ERROR
))
1341 if (expect_type
!= NULL
)
1342 val_type
= expect_type
;
1345 struct_return
= using_struct_return (exp
->gdbarch
,
1346 value_type (method
),
1349 else if (expect_type
!= NULL
)
1351 struct_return
= using_struct_return (exp
->gdbarch
, NULL
,
1352 check_typedef (expect_type
));
1355 /* Found a function symbol. Now we will substitute its
1356 value in place of the message dispatcher (obj_msgSend),
1357 so that we call the method directly instead of thru
1358 the dispatcher. The main reason for doing this is that
1359 we can now evaluate the return value and parameter values
1360 according to their known data types, in case we need to
1361 do things like promotion, dereferencing, special handling
1362 of structs and doubles, etc.
1364 We want to use the type signature of 'method', but still
1365 jump to objc_msgSend() or objc_msgSend_stret() to better
1366 mimic the behavior of the runtime. */
1370 if (TYPE_CODE (value_type (method
)) != TYPE_CODE_FUNC
)
1371 error (_("method address has symbol information "
1372 "with non-function type; skipping"));
1374 /* Create a function pointer of the appropriate type, and
1375 replace its value with the value of msg_send or
1376 msg_send_stret. We must use a pointer here, as
1377 msg_send and msg_send_stret are of pointer type, and
1378 the representation may be different on systems that use
1379 function descriptors. */
1382 = value_from_pointer (lookup_pointer_type (value_type (method
)),
1383 value_as_address (msg_send_stret
));
1386 = value_from_pointer (lookup_pointer_type (value_type (method
)),
1387 value_as_address (msg_send
));
1392 called_method
= msg_send_stret
;
1394 called_method
= msg_send
;
1397 if (noside
== EVAL_SKIP
)
1400 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1402 /* If the return type doesn't look like a function type,
1403 call an error. This can happen if somebody tries to
1404 turn a variable into a function call. This is here
1405 because people often want to call, eg, strcmp, which
1406 gdb doesn't know is a function. If gdb isn't asked for
1407 it's opinion (ie. through "whatis"), it won't offer
1410 struct type
*type
= value_type (called_method
);
1412 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1413 type
= TYPE_TARGET_TYPE (type
);
1414 type
= TYPE_TARGET_TYPE (type
);
1418 if ((TYPE_CODE (type
) == TYPE_CODE_ERROR
) && expect_type
)
1419 return allocate_value (expect_type
);
1421 return allocate_value (type
);
1424 error (_("Expression of type other than "
1425 "\"method returning ...\" used as a method"));
1428 /* Now depending on whether we found a symbol for the method,
1429 we will either call the runtime dispatcher or the method
1432 argvec
[0] = called_method
;
1434 argvec
[2] = value_from_longest (long_type
, selector
);
1435 /* User-supplied arguments. */
1436 for (tem
= 0; tem
< nargs
; tem
++)
1437 argvec
[tem
+ 3] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1438 argvec
[tem
+ 3] = 0;
1440 if (gnu_runtime
&& (method
!= NULL
))
1442 /* Function objc_msg_lookup returns a pointer. */
1443 deprecated_set_value_type (argvec
[0],
1444 lookup_pointer_type (lookup_function_type (value_type (argvec
[0]))));
1446 = call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1449 ret
= call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1456 op
= exp
->elts
[*pos
].opcode
;
1457 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1458 /* Allocate arg vector, including space for the function to be
1459 called in argvec[0] and a terminating NULL. */
1460 argvec
= (struct value
**)
1461 alloca (sizeof (struct value
*) * (nargs
+ 3));
1462 if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1465 /* First, evaluate the structure into arg2. */
1468 if (noside
== EVAL_SKIP
)
1471 if (op
== STRUCTOP_MEMBER
)
1473 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1477 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1480 /* If the function is a virtual function, then the
1481 aggregate value (providing the structure) plays
1482 its part by providing the vtable. Otherwise,
1483 it is just along for the ride: call the function
1486 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1488 if (TYPE_CODE (check_typedef (value_type (arg1
)))
1489 != TYPE_CODE_METHODPTR
)
1490 error (_("Non-pointer-to-member value used in pointer-to-member "
1493 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1495 struct type
*method_type
= check_typedef (value_type (arg1
));
1497 arg1
= value_zero (method_type
, not_lval
);
1500 arg1
= cplus_method_ptr_to_value (&arg2
, arg1
);
1502 /* Now, say which argument to start evaluating from. */
1505 else if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
)
1507 /* Hair for method invocations. */
1511 /* First, evaluate the structure into arg2. */
1513 tem2
= longest_to_int (exp
->elts
[pc2
+ 1].longconst
);
1514 *pos
+= 3 + BYTES_TO_EXP_ELEM (tem2
+ 1);
1515 if (noside
== EVAL_SKIP
)
1518 if (op
== STRUCTOP_STRUCT
)
1520 /* If v is a variable in a register, and the user types
1521 v.method (), this will produce an error, because v has
1524 A possible way around this would be to allocate a
1525 copy of the variable on the stack, copy in the
1526 contents, call the function, and copy out the
1527 contents. I.e. convert this from call by reference
1528 to call by copy-return (or whatever it's called).
1529 However, this does not work because it is not the
1530 same: the method being called could stash a copy of
1531 the address, and then future uses through that address
1532 (after the method returns) would be expected to
1533 use the variable itself, not some copy of it. */
1534 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1538 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1540 /* Check to see if the operator '->' has been
1541 overloaded. If the operator has been overloaded
1542 replace arg2 with the value returned by the custom
1543 operator and continue evaluation. */
1544 while (unop_user_defined_p (op
, arg2
))
1546 volatile struct gdb_exception except
;
1547 struct value
*value
= NULL
;
1548 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1550 value
= value_x_unop (arg2
, op
, noside
);
1553 if (except
.reason
< 0)
1555 if (except
.error
== NOT_FOUND_ERROR
)
1558 throw_exception (except
);
1563 /* Now, say which argument to start evaluating from. */
1566 else if (op
== OP_SCOPE
1567 && overload_resolution
1568 && (exp
->language_defn
->la_language
== language_cplus
))
1570 /* Unpack it locally so we can properly handle overload
1576 local_tem
= longest_to_int (exp
->elts
[pc2
+ 2].longconst
);
1577 (*pos
) += 4 + BYTES_TO_EXP_ELEM (local_tem
+ 1);
1578 type
= exp
->elts
[pc2
+ 1].type
;
1579 name
= &exp
->elts
[pc2
+ 3].string
;
1582 function_name
= NULL
;
1583 if (TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
1585 function
= cp_lookup_symbol_namespace (TYPE_TAG_NAME (type
),
1587 get_selected_block (0),
1589 if (function
== NULL
)
1590 error (_("No symbol \"%s\" in namespace \"%s\"."),
1591 name
, TYPE_TAG_NAME (type
));
1597 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1598 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1599 function_name
= name
;
1601 arg2
= value_zero (type
, lval_memory
);
1606 else if (op
== OP_ADL_FUNC
)
1608 /* Save the function position and move pos so that the arguments
1609 can be evaluated. */
1615 func_name_len
= longest_to_int (exp
->elts
[save_pos1
+ 3].longconst
);
1616 (*pos
) += 6 + BYTES_TO_EXP_ELEM (func_name_len
+ 1);
1620 /* Non-method function call. */
1624 /* If this is a C++ function wait until overload resolution. */
1625 if (op
== OP_VAR_VALUE
1626 && overload_resolution
1627 && (exp
->language_defn
->la_language
== language_cplus
))
1629 (*pos
) += 4; /* Skip the evaluation of the symbol. */
1634 argvec
[0] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1635 type
= value_type (argvec
[0]);
1636 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1637 type
= TYPE_TARGET_TYPE (type
);
1638 if (type
&& TYPE_CODE (type
) == TYPE_CODE_FUNC
)
1640 for (; tem
<= nargs
&& tem
<= TYPE_NFIELDS (type
); tem
++)
1642 argvec
[tem
] = evaluate_subexp (TYPE_FIELD_TYPE (type
,
1650 /* Evaluate arguments. */
1651 for (; tem
<= nargs
; tem
++)
1653 /* Ensure that array expressions are coerced into pointer
1655 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1658 /* Signal end of arglist. */
1660 if (op
== OP_ADL_FUNC
)
1662 struct symbol
*symp
;
1665 int string_pc
= save_pos1
+ 3;
1667 /* Extract the function name. */
1668 name_len
= longest_to_int (exp
->elts
[string_pc
].longconst
);
1669 func_name
= (char *) alloca (name_len
+ 1);
1670 strcpy (func_name
, &exp
->elts
[string_pc
+ 1].string
);
1672 /* Prepare list of argument types for overload resolution. */
1673 arg_types
= (struct type
**)
1674 alloca (nargs
* (sizeof (struct type
*)));
1675 for (ix
= 1; ix
<= nargs
; ix
++)
1676 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1678 find_overload_match (arg_types
, nargs
, func_name
,
1679 NON_METHOD
, /* not method */
1680 0, /* strict match */
1681 NULL
, NULL
, /* pass NULL symbol since
1682 symbol is unknown */
1683 NULL
, &symp
, NULL
, 0);
1685 /* Now fix the expression being evaluated. */
1686 exp
->elts
[save_pos1
+ 2].symbol
= symp
;
1687 argvec
[0] = evaluate_subexp_with_coercion (exp
, &save_pos1
, noside
);
1690 if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
1691 || (op
== OP_SCOPE
&& function_name
!= NULL
))
1693 int static_memfuncp
;
1696 /* Method invocation : stuff "this" as first parameter. */
1701 /* Name of method from expression. */
1702 tstr
= &exp
->elts
[pc2
+ 2].string
;
1705 tstr
= function_name
;
1707 if (overload_resolution
&& (exp
->language_defn
->la_language
1710 /* Language is C++, do some overload resolution before
1712 struct value
*valp
= NULL
;
1714 /* Prepare list of argument types for overload resolution. */
1715 arg_types
= (struct type
**)
1716 alloca (nargs
* (sizeof (struct type
*)));
1717 for (ix
= 1; ix
<= nargs
; ix
++)
1718 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1720 (void) find_overload_match (arg_types
, nargs
, tstr
,
1721 METHOD
, /* method */
1722 0, /* strict match */
1723 &arg2
, /* the object */
1725 &static_memfuncp
, 0);
1727 if (op
== OP_SCOPE
&& !static_memfuncp
)
1729 /* For the time being, we don't handle this. */
1730 error (_("Call to overloaded function %s requires "
1734 argvec
[1] = arg2
; /* the ``this'' pointer */
1735 argvec
[0] = valp
; /* Use the method found after overload
1739 /* Non-C++ case -- or no overload resolution. */
1741 struct value
*temp
= arg2
;
1743 argvec
[0] = value_struct_elt (&temp
, argvec
+ 1, tstr
,
1745 op
== STRUCTOP_STRUCT
1746 ? "structure" : "structure pointer");
1747 /* value_struct_elt updates temp with the correct value
1748 of the ``this'' pointer if necessary, so modify argvec[1] to
1749 reflect any ``this'' changes. */
1751 = value_from_longest (lookup_pointer_type(value_type (temp
)),
1752 value_address (temp
)
1753 + value_embedded_offset (temp
));
1754 argvec
[1] = arg2
; /* the ``this'' pointer */
1757 if (static_memfuncp
)
1759 argvec
[1] = argvec
[0];
1764 else if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1769 else if (op
== OP_VAR_VALUE
|| (op
== OP_SCOPE
&& function
!= NULL
))
1771 /* Non-member function being called. */
1772 /* fn: This can only be done for C++ functions. A C-style function
1773 in a C++ program, for instance, does not have the fields that
1774 are expected here. */
1776 if (overload_resolution
&& (exp
->language_defn
->la_language
1779 /* Language is C++, do some overload resolution before
1781 struct symbol
*symp
;
1784 /* If a scope has been specified disable ADL. */
1788 if (op
== OP_VAR_VALUE
)
1789 function
= exp
->elts
[save_pos1
+2].symbol
;
1791 /* Prepare list of argument types for overload resolution. */
1792 arg_types
= (struct type
**)
1793 alloca (nargs
* (sizeof (struct type
*)));
1794 for (ix
= 1; ix
<= nargs
; ix
++)
1795 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1797 (void) find_overload_match (arg_types
, nargs
,
1798 NULL
, /* no need for name */
1799 NON_METHOD
, /* not method */
1800 0, /* strict match */
1801 NULL
, function
, /* the function */
1802 NULL
, &symp
, NULL
, no_adl
);
1804 if (op
== OP_VAR_VALUE
)
1806 /* Now fix the expression being evaluated. */
1807 exp
->elts
[save_pos1
+2].symbol
= symp
;
1808 argvec
[0] = evaluate_subexp_with_coercion (exp
, &save_pos1
,
1812 argvec
[0] = value_of_variable (symp
, get_selected_block (0));
1816 /* Not C++, or no overload resolution allowed. */
1817 /* Nothing to be done; argvec already correctly set up. */
1822 /* It is probably a C-style function. */
1823 /* Nothing to be done; argvec already correctly set up. */
1828 if (noside
== EVAL_SKIP
)
1830 if (argvec
[0] == NULL
)
1831 error (_("Cannot evaluate function -- may be inlined"));
1832 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1834 /* If the return type doesn't look like a function type, call an
1835 error. This can happen if somebody tries to turn a variable into
1836 a function call. This is here because people often want to
1837 call, eg, strcmp, which gdb doesn't know is a function. If
1838 gdb isn't asked for it's opinion (ie. through "whatis"),
1839 it won't offer it. */
1841 struct type
*ftype
= value_type (argvec
[0]);
1843 if (TYPE_CODE (ftype
) == TYPE_CODE_INTERNAL_FUNCTION
)
1845 /* We don't know anything about what the internal
1846 function might return, but we have to return
1848 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
1851 else if (TYPE_TARGET_TYPE (ftype
))
1852 return allocate_value (TYPE_TARGET_TYPE (ftype
));
1854 error (_("Expression of type other than "
1855 "\"Function returning ...\" used as function"));
1857 if (TYPE_CODE (value_type (argvec
[0])) == TYPE_CODE_INTERNAL_FUNCTION
)
1858 return call_internal_function (exp
->gdbarch
, exp
->language_defn
,
1859 argvec
[0], nargs
, argvec
+ 1);
1861 return call_function_by_hand (argvec
[0], nargs
, argvec
+ 1);
1862 /* pai: FIXME save value from call_function_by_hand, then adjust
1863 pc by adjust_fn_pc if +ve. */
1865 case OP_F77_UNDETERMINED_ARGLIST
:
1867 /* Remember that in F77, functions, substring ops and
1868 array subscript operations cannot be disambiguated
1869 at parse time. We have made all array subscript operations,
1870 substring operations as well as function calls come here
1871 and we now have to discover what the heck this thing actually was.
1872 If it is a function, we process just as if we got an OP_FUNCALL. */
1874 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1877 /* First determine the type code we are dealing with. */
1878 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1879 type
= check_typedef (value_type (arg1
));
1880 code
= TYPE_CODE (type
);
1882 if (code
== TYPE_CODE_PTR
)
1884 /* Fortran always passes variable to subroutines as pointer.
1885 So we need to look into its target type to see if it is
1886 array, string or function. If it is, we need to switch
1887 to the target value the original one points to. */
1888 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1890 if (TYPE_CODE (target_type
) == TYPE_CODE_ARRAY
1891 || TYPE_CODE (target_type
) == TYPE_CODE_STRING
1892 || TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
1894 arg1
= value_ind (arg1
);
1895 type
= check_typedef (value_type (arg1
));
1896 code
= TYPE_CODE (type
);
1902 case TYPE_CODE_ARRAY
:
1903 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1904 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1906 goto multi_f77_subscript
;
1908 case TYPE_CODE_STRING
:
1909 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1910 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1913 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1914 return value_subscript (arg1
, value_as_long (arg2
));
1918 case TYPE_CODE_FUNC
:
1919 /* It's a function call. */
1920 /* Allocate arg vector, including space for the function to be
1921 called in argvec[0] and a terminating NULL. */
1922 argvec
= (struct value
**)
1923 alloca (sizeof (struct value
*) * (nargs
+ 2));
1926 for (; tem
<= nargs
; tem
++)
1927 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1928 argvec
[tem
] = 0; /* signal end of arglist */
1932 error (_("Cannot perform substring on this type"));
1936 /* We have a complex number, There should be 2 floating
1937 point numbers that compose it. */
1939 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1940 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1942 return value_literal_complex (arg1
, arg2
, exp
->elts
[pc
+ 1].type
);
1944 case STRUCTOP_STRUCT
:
1945 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1946 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1947 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1948 if (noside
== EVAL_SKIP
)
1950 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1951 return value_zero (lookup_struct_elt_type (value_type (arg1
),
1952 &exp
->elts
[pc
+ 2].string
,
1957 struct value
*temp
= arg1
;
1959 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
1964 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1965 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1966 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1967 if (noside
== EVAL_SKIP
)
1970 /* Check to see if operator '->' has been overloaded. If so replace
1971 arg1 with the value returned by evaluating operator->(). */
1972 while (unop_user_defined_p (op
, arg1
))
1974 volatile struct gdb_exception except
;
1975 struct value
*value
= NULL
;
1976 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1978 value
= value_x_unop (arg1
, op
, noside
);
1981 if (except
.reason
< 0)
1983 if (except
.error
== NOT_FOUND_ERROR
)
1986 throw_exception (except
);
1991 /* JYG: if print object is on we need to replace the base type
1992 with rtti type in order to continue on with successful
1993 lookup of member / method only available in the rtti type. */
1995 struct type
*type
= value_type (arg1
);
1996 struct type
*real_type
;
1997 int full
, top
, using_enc
;
1998 struct value_print_options opts
;
2000 get_user_print_options (&opts
);
2001 if (opts
.objectprint
&& TYPE_TARGET_TYPE(type
)
2002 && (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_CLASS
))
2004 real_type
= value_rtti_target_type (arg1
, &full
, &top
, &using_enc
);
2007 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
2008 real_type
= lookup_pointer_type (real_type
);
2010 real_type
= lookup_reference_type (real_type
);
2012 arg1
= value_cast (real_type
, arg1
);
2017 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2018 return value_zero (lookup_struct_elt_type (value_type (arg1
),
2019 &exp
->elts
[pc
+ 2].string
,
2024 struct value
*temp
= arg1
;
2026 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
2027 NULL
, "structure pointer");
2030 case STRUCTOP_MEMBER
:
2032 if (op
== STRUCTOP_MEMBER
)
2033 arg1
= evaluate_subexp_for_address (exp
, pos
, noside
);
2035 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2037 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2039 if (noside
== EVAL_SKIP
)
2042 type
= check_typedef (value_type (arg2
));
2043 switch (TYPE_CODE (type
))
2045 case TYPE_CODE_METHODPTR
:
2046 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2047 return value_zero (TYPE_TARGET_TYPE (type
), not_lval
);
2050 arg2
= cplus_method_ptr_to_value (&arg1
, arg2
);
2051 gdb_assert (TYPE_CODE (value_type (arg2
)) == TYPE_CODE_PTR
);
2052 return value_ind (arg2
);
2055 case TYPE_CODE_MEMBERPTR
:
2056 /* Now, convert these values to an address. */
2057 arg1
= value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type
)),
2060 mem_offset
= value_as_long (arg2
);
2062 arg3
= value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2063 value_as_long (arg1
) + mem_offset
);
2064 return value_ind (arg3
);
2067 error (_("non-pointer-to-member value used "
2068 "in pointer-to-member construct"));
2072 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
2073 arg_types
= (struct type
**) alloca (nargs
* sizeof (struct type
*));
2074 for (ix
= 0; ix
< nargs
; ++ix
)
2075 arg_types
[ix
] = exp
->elts
[pc
+ 1 + ix
+ 1].type
;
2077 expect_type
= make_params (nargs
, arg_types
);
2078 *(pos
) += 3 + nargs
;
2079 arg1
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
2080 xfree (TYPE_FIELDS (expect_type
));
2081 xfree (TYPE_MAIN_TYPE (expect_type
));
2082 xfree (expect_type
);
2086 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2087 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2088 if (noside
== EVAL_SKIP
)
2090 if (binop_user_defined_p (op
, arg1
, arg2
))
2091 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2093 return value_concat (arg1
, arg2
);
2096 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2097 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2099 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2101 if (binop_user_defined_p (op
, arg1
, arg2
))
2102 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2104 return value_assign (arg1
, arg2
);
2106 case BINOP_ASSIGN_MODIFY
:
2108 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2109 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2110 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2112 op
= exp
->elts
[pc
+ 1].opcode
;
2113 if (binop_user_defined_p (op
, arg1
, arg2
))
2114 return value_x_binop (arg1
, arg2
, BINOP_ASSIGN_MODIFY
, op
, noside
);
2115 else if (op
== BINOP_ADD
&& ptrmath_type_p (exp
->language_defn
,
2117 && is_integral_type (value_type (arg2
)))
2118 arg2
= value_ptradd (arg1
, value_as_long (arg2
));
2119 else if (op
== BINOP_SUB
&& ptrmath_type_p (exp
->language_defn
,
2121 && is_integral_type (value_type (arg2
)))
2122 arg2
= value_ptradd (arg1
, - value_as_long (arg2
));
2125 struct value
*tmp
= arg1
;
2127 /* For shift and integer exponentiation operations,
2128 only promote the first argument. */
2129 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
2130 && is_integral_type (value_type (arg2
)))
2131 unop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
);
2133 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2135 arg2
= value_binop (tmp
, arg2
, op
);
2137 return value_assign (arg1
, arg2
);
2140 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2141 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2142 if (noside
== EVAL_SKIP
)
2144 if (binop_user_defined_p (op
, arg1
, arg2
))
2145 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2146 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
))
2147 && is_integral_type (value_type (arg2
)))
2148 return value_ptradd (arg1
, value_as_long (arg2
));
2149 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg2
))
2150 && is_integral_type (value_type (arg1
)))
2151 return value_ptradd (arg2
, value_as_long (arg1
));
2154 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2155 return value_binop (arg1
, arg2
, BINOP_ADD
);
2159 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2160 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2161 if (noside
== EVAL_SKIP
)
2163 if (binop_user_defined_p (op
, arg1
, arg2
))
2164 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2165 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
))
2166 && ptrmath_type_p (exp
->language_defn
, value_type (arg2
)))
2168 /* FIXME -- should be ptrdiff_t */
2169 type
= builtin_type (exp
->gdbarch
)->builtin_long
;
2170 return value_from_longest (type
, value_ptrdiff (arg1
, arg2
));
2172 else if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
))
2173 && is_integral_type (value_type (arg2
)))
2174 return value_ptradd (arg1
, - value_as_long (arg2
));
2177 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2178 return value_binop (arg1
, arg2
, BINOP_SUB
);
2189 case BINOP_BITWISE_AND
:
2190 case BINOP_BITWISE_IOR
:
2191 case BINOP_BITWISE_XOR
:
2192 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2193 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2194 if (noside
== EVAL_SKIP
)
2196 if (binop_user_defined_p (op
, arg1
, arg2
))
2197 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2200 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
2201 fudge arg2 to avoid division-by-zero, the caller is
2202 (theoretically) only looking for the type of the result. */
2203 if (noside
== EVAL_AVOID_SIDE_EFFECTS
2204 /* ??? Do we really want to test for BINOP_MOD here?
2205 The implementation of value_binop gives it a well-defined
2208 || op
== BINOP_INTDIV
2211 && value_logical_not (arg2
))
2213 struct value
*v_one
, *retval
;
2215 v_one
= value_one (value_type (arg2
), not_lval
);
2216 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &v_one
);
2217 retval
= value_binop (arg1
, v_one
, op
);
2222 /* For shift and integer exponentiation operations,
2223 only promote the first argument. */
2224 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
2225 && is_integral_type (value_type (arg2
)))
2226 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2228 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2230 return value_binop (arg1
, arg2
, op
);
2235 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2236 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2237 if (noside
== EVAL_SKIP
)
2239 error (_("':' operator used in invalid context"));
2241 case BINOP_SUBSCRIPT
:
2242 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2243 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2244 if (noside
== EVAL_SKIP
)
2246 if (binop_user_defined_p (op
, arg1
, arg2
))
2247 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2250 /* If the user attempts to subscript something that is not an
2251 array or pointer type (like a plain int variable for example),
2252 then report this as an error. */
2254 arg1
= coerce_ref (arg1
);
2255 type
= check_typedef (value_type (arg1
));
2256 if (TYPE_CODE (type
) != TYPE_CODE_ARRAY
2257 && TYPE_CODE (type
) != TYPE_CODE_PTR
)
2259 if (TYPE_NAME (type
))
2260 error (_("cannot subscript something of type `%s'"),
2263 error (_("cannot subscript requested type"));
2266 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2267 return value_zero (TYPE_TARGET_TYPE (type
), VALUE_LVAL (arg1
));
2269 return value_subscript (arg1
, value_as_long (arg2
));
2273 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2274 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2275 if (noside
== EVAL_SKIP
)
2277 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2278 return value_from_longest (type
, (LONGEST
) value_in (arg1
, arg2
));
2280 case MULTI_SUBSCRIPT
:
2282 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
2283 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2286 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2287 /* FIXME: EVAL_SKIP handling may not be correct. */
2288 if (noside
== EVAL_SKIP
)
2299 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
2300 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2302 /* If the user attempts to subscript something that has no target
2303 type (like a plain int variable for example), then report this
2306 type
= TYPE_TARGET_TYPE (check_typedef (value_type (arg1
)));
2309 arg1
= value_zero (type
, VALUE_LVAL (arg1
));
2315 error (_("cannot subscript something of type `%s'"),
2316 TYPE_NAME (value_type (arg1
)));
2320 if (binop_user_defined_p (op
, arg1
, arg2
))
2322 arg1
= value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2326 arg1
= coerce_ref (arg1
);
2327 type
= check_typedef (value_type (arg1
));
2329 switch (TYPE_CODE (type
))
2332 case TYPE_CODE_ARRAY
:
2333 case TYPE_CODE_STRING
:
2334 arg1
= value_subscript (arg1
, value_as_long (arg2
));
2337 case TYPE_CODE_BITSTRING
:
2338 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2339 arg1
= value_bitstring_subscript (type
, arg1
,
2340 value_as_long (arg2
));
2344 if (TYPE_NAME (type
))
2345 error (_("cannot subscript something of type `%s'"),
2348 error (_("cannot subscript requested type"));
2354 multi_f77_subscript
:
2356 LONGEST subscript_array
[MAX_FORTRAN_DIMS
];
2357 int ndimensions
= 1, i
;
2358 struct value
*array
= arg1
;
2360 if (nargs
> MAX_FORTRAN_DIMS
)
2361 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS
);
2363 ndimensions
= calc_f77_array_dims (type
);
2365 if (nargs
!= ndimensions
)
2366 error (_("Wrong number of subscripts"));
2368 gdb_assert (nargs
> 0);
2370 /* Now that we know we have a legal array subscript expression
2371 let us actually find out where this element exists in the array. */
2373 /* Take array indices left to right. */
2374 for (i
= 0; i
< nargs
; i
++)
2376 /* Evaluate each subscript; it must be a legal integer in F77. */
2377 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2379 /* Fill in the subscript array. */
2381 subscript_array
[i
] = value_as_long (arg2
);
2384 /* Internal type of array is arranged right to left. */
2385 for (i
= nargs
; i
> 0; i
--)
2387 struct type
*array_type
= check_typedef (value_type (array
));
2388 LONGEST index
= subscript_array
[i
- 1];
2390 lower
= f77_get_lowerbound (array_type
);
2391 array
= value_subscripted_rvalue (array
, index
, lower
);
2397 case BINOP_LOGICAL_AND
:
2398 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2399 if (noside
== EVAL_SKIP
)
2401 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2406 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2409 if (binop_user_defined_p (op
, arg1
, arg2
))
2411 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2412 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2416 tem
= value_logical_not (arg1
);
2417 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2418 (tem
? EVAL_SKIP
: noside
));
2419 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2420 return value_from_longest (type
,
2421 (LONGEST
) (!tem
&& !value_logical_not (arg2
)));
2424 case BINOP_LOGICAL_OR
:
2425 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2426 if (noside
== EVAL_SKIP
)
2428 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2433 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2436 if (binop_user_defined_p (op
, arg1
, arg2
))
2438 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2439 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2443 tem
= value_logical_not (arg1
);
2444 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2445 (!tem
? EVAL_SKIP
: noside
));
2446 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2447 return value_from_longest (type
,
2448 (LONGEST
) (!tem
|| !value_logical_not (arg2
)));
2452 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2453 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2454 if (noside
== EVAL_SKIP
)
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
);
2468 case BINOP_NOTEQUAL
:
2469 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2470 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2471 if (noside
== EVAL_SKIP
)
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_equal (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
)
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 (arg1
, arg2
);
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
)
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
);
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
)
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 (arg2
, arg1
) || 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 (value_type (arg1
), exp
, pos
, noside
);
2539 if (noside
== EVAL_SKIP
)
2541 if (binop_user_defined_p (op
, arg1
, arg2
))
2543 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2547 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2548 tem
= value_less (arg1
, arg2
) || value_equal (arg1
, arg2
);
2549 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2550 return value_from_longest (type
, (LONGEST
) tem
);
2554 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2555 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2556 if (noside
== EVAL_SKIP
)
2558 type
= check_typedef (value_type (arg2
));
2559 if (TYPE_CODE (type
) != TYPE_CODE_INT
)
2560 error (_("Non-integral right operand for \"@\" operator."));
2561 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2563 return allocate_repeat_value (value_type (arg1
),
2564 longest_to_int (value_as_long (arg2
)));
2567 return value_repeat (arg1
, longest_to_int (value_as_long (arg2
)));
2570 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2571 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2574 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2575 if (noside
== EVAL_SKIP
)
2577 if (unop_user_defined_p (op
, arg1
))
2578 return value_x_unop (arg1
, op
, noside
);
2581 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2582 return value_pos (arg1
);
2586 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2587 if (noside
== EVAL_SKIP
)
2589 if (unop_user_defined_p (op
, arg1
))
2590 return value_x_unop (arg1
, op
, noside
);
2593 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2594 return value_neg (arg1
);
2597 case UNOP_COMPLEMENT
:
2598 /* C++: check for and handle destructor names. */
2599 op
= exp
->elts
[*pos
].opcode
;
2601 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2602 if (noside
== EVAL_SKIP
)
2604 if (unop_user_defined_p (UNOP_COMPLEMENT
, arg1
))
2605 return value_x_unop (arg1
, UNOP_COMPLEMENT
, noside
);
2608 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2609 return value_complement (arg1
);
2612 case UNOP_LOGICAL_NOT
:
2613 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2614 if (noside
== EVAL_SKIP
)
2616 if (unop_user_defined_p (op
, arg1
))
2617 return value_x_unop (arg1
, op
, noside
);
2620 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2621 return value_from_longest (type
, (LONGEST
) value_logical_not (arg1
));
2625 if (expect_type
&& TYPE_CODE (expect_type
) == TYPE_CODE_PTR
)
2626 expect_type
= TYPE_TARGET_TYPE (check_typedef (expect_type
));
2627 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2628 type
= check_typedef (value_type (arg1
));
2629 if (TYPE_CODE (type
) == TYPE_CODE_METHODPTR
2630 || TYPE_CODE (type
) == TYPE_CODE_MEMBERPTR
)
2631 error (_("Attempt to dereference pointer "
2632 "to member without an object"));
2633 if (noside
== EVAL_SKIP
)
2635 if (unop_user_defined_p (op
, arg1
))
2636 return value_x_unop (arg1
, op
, noside
);
2637 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2639 type
= check_typedef (value_type (arg1
));
2640 if (TYPE_CODE (type
) == TYPE_CODE_PTR
2641 || TYPE_CODE (type
) == TYPE_CODE_REF
2642 /* In C you can dereference an array to get the 1st elt. */
2643 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
2645 return value_zero (TYPE_TARGET_TYPE (type
),
2647 else if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2648 /* GDB allows dereferencing an int. */
2649 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
2652 error (_("Attempt to take contents of a non-pointer value."));
2655 /* Allow * on an integer so we can cast it to whatever we want.
2656 This returns an int, which seems like the most C-like thing to
2657 do. "long long" variables are rare enough that
2658 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2659 if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2660 return value_at_lazy (builtin_type (exp
->gdbarch
)->builtin_int
,
2661 (CORE_ADDR
) value_as_address (arg1
));
2662 return value_ind (arg1
);
2665 /* C++: check for and handle pointer to members. */
2667 op
= exp
->elts
[*pos
].opcode
;
2669 if (noside
== EVAL_SKIP
)
2671 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2676 struct value
*retvalp
= evaluate_subexp_for_address (exp
, pos
,
2683 if (noside
== EVAL_SKIP
)
2685 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2688 return evaluate_subexp_for_sizeof (exp
, pos
);
2692 type
= exp
->elts
[pc
+ 1].type
;
2693 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2694 if (noside
== EVAL_SKIP
)
2696 if (type
!= value_type (arg1
))
2697 arg1
= value_cast (type
, arg1
);
2700 case UNOP_DYNAMIC_CAST
:
2702 type
= exp
->elts
[pc
+ 1].type
;
2703 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2704 if (noside
== EVAL_SKIP
)
2706 return value_dynamic_cast (type
, arg1
);
2708 case UNOP_REINTERPRET_CAST
:
2710 type
= exp
->elts
[pc
+ 1].type
;
2711 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2712 if (noside
== EVAL_SKIP
)
2714 return value_reinterpret_cast (type
, arg1
);
2718 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2719 if (noside
== EVAL_SKIP
)
2721 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2722 return value_zero (exp
->elts
[pc
+ 1].type
, lval_memory
);
2724 return value_at_lazy (exp
->elts
[pc
+ 1].type
,
2725 value_as_address (arg1
));
2727 case UNOP_MEMVAL_TLS
:
2729 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2730 if (noside
== EVAL_SKIP
)
2732 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2733 return value_zero (exp
->elts
[pc
+ 2].type
, lval_memory
);
2738 tls_addr
= target_translate_tls_address (exp
->elts
[pc
+ 1].objfile
,
2739 value_as_address (arg1
));
2740 return value_at_lazy (exp
->elts
[pc
+ 2].type
, tls_addr
);
2743 case UNOP_PREINCREMENT
:
2744 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2745 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2747 else if (unop_user_defined_p (op
, arg1
))
2749 return value_x_unop (arg1
, op
, noside
);
2753 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2754 arg2
= value_ptradd (arg1
, 1);
2757 struct value
*tmp
= arg1
;
2759 arg2
= value_one (value_type (arg1
), not_lval
);
2760 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2761 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2764 return value_assign (arg1
, arg2
);
2767 case UNOP_PREDECREMENT
:
2768 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2769 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2771 else if (unop_user_defined_p (op
, arg1
))
2773 return value_x_unop (arg1
, op
, noside
);
2777 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2778 arg2
= value_ptradd (arg1
, -1);
2781 struct value
*tmp
= arg1
;
2783 arg2
= value_one (value_type (arg1
), not_lval
);
2784 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2785 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2788 return value_assign (arg1
, arg2
);
2791 case UNOP_POSTINCREMENT
:
2792 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2793 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2795 else if (unop_user_defined_p (op
, arg1
))
2797 return value_x_unop (arg1
, op
, noside
);
2801 arg3
= value_non_lval (arg1
);
2803 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2804 arg2
= value_ptradd (arg1
, 1);
2807 struct value
*tmp
= arg1
;
2809 arg2
= value_one (value_type (arg1
), not_lval
);
2810 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2811 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2814 value_assign (arg1
, arg2
);
2818 case UNOP_POSTDECREMENT
:
2819 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2820 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2822 else if (unop_user_defined_p (op
, arg1
))
2824 return value_x_unop (arg1
, op
, noside
);
2828 arg3
= value_non_lval (arg1
);
2830 if (ptrmath_type_p (exp
->language_defn
, value_type (arg1
)))
2831 arg2
= value_ptradd (arg1
, -1);
2834 struct value
*tmp
= arg1
;
2836 arg2
= value_one (value_type (arg1
), not_lval
);
2837 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2838 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2841 value_assign (arg1
, arg2
);
2847 return value_of_this (1);
2851 return value_of_local ("self", 1);
2854 /* The value is not supposed to be used. This is here to make it
2855 easier to accommodate expressions that contain types. */
2857 if (noside
== EVAL_SKIP
)
2859 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2861 struct type
*type
= exp
->elts
[pc
+ 1].type
;
2863 /* If this is a typedef, then find its immediate target. We
2864 use check_typedef to resolve stubs, but we ignore its
2865 result because we do not want to dig past all
2867 check_typedef (type
);
2868 if (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2869 type
= TYPE_TARGET_TYPE (type
);
2870 return allocate_value (type
);
2873 error (_("Attempt to use a type name as an expression"));
2876 /* Removing this case and compiling with gcc -Wall reveals that
2877 a lot of cases are hitting this case. Some of these should
2878 probably be removed from expression.h; others are legitimate
2879 expressions which are (apparently) not fully implemented.
2881 If there are any cases landing here which mean a user error,
2882 then they should be separate cases, with more descriptive
2885 error (_("GDB does not (yet) know how to "
2886 "evaluate that kind of expression"));
2890 return value_from_longest (builtin_type (exp
->gdbarch
)->builtin_int
, 1);
2893 /* Evaluate a subexpression of EXP, at index *POS,
2894 and return the address of that subexpression.
2895 Advance *POS over the subexpression.
2896 If the subexpression isn't an lvalue, get an error.
2897 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2898 then only the type of the result need be correct. */
2900 static struct value
*
2901 evaluate_subexp_for_address (struct expression
*exp
, int *pos
,
2911 op
= exp
->elts
[pc
].opcode
;
2917 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2919 /* We can't optimize out "&*" if there's a user-defined operator*. */
2920 if (unop_user_defined_p (op
, x
))
2922 x
= value_x_unop (x
, op
, noside
);
2923 goto default_case_after_eval
;
2926 return coerce_array (x
);
2930 return value_cast (lookup_pointer_type (exp
->elts
[pc
+ 1].type
),
2931 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
2934 var
= exp
->elts
[pc
+ 2].symbol
;
2936 /* C++: The "address" of a reference should yield the address
2937 * of the object pointed to. Let value_addr() deal with it. */
2938 if (TYPE_CODE (SYMBOL_TYPE (var
)) == TYPE_CODE_REF
)
2942 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2945 lookup_pointer_type (SYMBOL_TYPE (var
));
2946 enum address_class sym_class
= SYMBOL_CLASS (var
);
2948 if (sym_class
== LOC_CONST
2949 || sym_class
== LOC_CONST_BYTES
2950 || sym_class
== LOC_REGISTER
)
2951 error (_("Attempt to take address of register or constant."));
2954 value_zero (type
, not_lval
);
2957 return address_of_variable (var
, exp
->elts
[pc
+ 1].block
);
2960 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
2961 (*pos
) += 5 + BYTES_TO_EXP_ELEM (tem
+ 1);
2962 x
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
2963 &exp
->elts
[pc
+ 3].string
,
2966 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
2971 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2972 default_case_after_eval
:
2973 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2975 struct type
*type
= check_typedef (value_type (x
));
2977 if (VALUE_LVAL (x
) == lval_memory
|| value_must_coerce_to_target (x
))
2978 return value_zero (lookup_pointer_type (value_type (x
)),
2980 else if (TYPE_CODE (type
) == TYPE_CODE_REF
)
2981 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2984 error (_("Attempt to take address of "
2985 "value not located in memory."));
2987 return value_addr (x
);
2991 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2992 When used in contexts where arrays will be coerced anyway, this is
2993 equivalent to `evaluate_subexp' but much faster because it avoids
2994 actually fetching array contents (perhaps obsolete now that we have
2997 Note that we currently only do the coercion for C expressions, where
2998 arrays are zero based and the coercion is correct. For other languages,
2999 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
3000 to decide if coercion is appropriate. */
3003 evaluate_subexp_with_coercion (struct expression
*exp
,
3004 int *pos
, enum noside noside
)
3013 op
= exp
->elts
[pc
].opcode
;
3018 var
= exp
->elts
[pc
+ 2].symbol
;
3019 type
= check_typedef (SYMBOL_TYPE (var
));
3020 if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
3021 && !TYPE_VECTOR (type
)
3022 && CAST_IS_CONVERSION (exp
->language_defn
))
3025 val
= address_of_variable (var
, exp
->elts
[pc
+ 1].block
);
3026 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
3032 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
3036 /* Evaluate a subexpression of EXP, at index *POS,
3037 and return a value for the size of that subexpression.
3038 Advance *POS over the subexpression. */
3040 static struct value
*
3041 evaluate_subexp_for_sizeof (struct expression
*exp
, int *pos
)
3043 /* FIXME: This should be size_t. */
3044 struct type
*size_type
= builtin_type (exp
->gdbarch
)->builtin_int
;
3051 op
= exp
->elts
[pc
].opcode
;
3055 /* This case is handled specially
3056 so that we avoid creating a value for the result type.
3057 If the result type is very big, it's desirable not to
3058 create a value unnecessarily. */
3061 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
3062 type
= check_typedef (value_type (val
));
3063 if (TYPE_CODE (type
) != TYPE_CODE_PTR
3064 && TYPE_CODE (type
) != TYPE_CODE_REF
3065 && TYPE_CODE (type
) != TYPE_CODE_ARRAY
)
3066 error (_("Attempt to take contents of a non-pointer value."));
3067 type
= check_typedef (TYPE_TARGET_TYPE (type
));
3068 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
3072 type
= check_typedef (exp
->elts
[pc
+ 1].type
);
3073 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
3077 type
= check_typedef (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
));
3079 value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
3082 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
3083 return value_from_longest (size_type
,
3084 (LONGEST
) TYPE_LENGTH (value_type (val
)));
3088 /* Parse a type expression in the string [P..P+LENGTH). */
3091 parse_and_eval_type (char *p
, int length
)
3093 char *tmp
= (char *) alloca (length
+ 4);
3094 struct expression
*expr
;
3097 memcpy (tmp
+ 1, p
, length
);
3098 tmp
[length
+ 1] = ')';
3099 tmp
[length
+ 2] = '0';
3100 tmp
[length
+ 3] = '\0';
3101 expr
= parse_expression (tmp
);
3102 if (expr
->elts
[0].opcode
!= UNOP_CAST
)
3103 error (_("Internal error in eval_type."));
3104 return expr
->elts
[1].type
;
3108 calc_f77_array_dims (struct type
*array_type
)
3111 struct type
*tmp_type
;
3113 if ((TYPE_CODE (array_type
) != TYPE_CODE_ARRAY
))
3114 error (_("Can't get dimensions for a non-array type"));
3116 tmp_type
= array_type
;
3118 while ((tmp_type
= TYPE_TARGET_TYPE (tmp_type
)))
3120 if (TYPE_CODE (tmp_type
) == TYPE_CODE_ARRAY
)