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 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_assert.h"
45 /* This is defined in valops.c */
46 extern int overload_resolution;
48 /* JYG: lookup rtti type of STRUCTOP_PTR when this is set to continue
49 on with successful lookup for member/method of the rtti type. */
50 extern int objectprint;
52 /* Prototypes for local functions. */
54 static struct value *evaluate_subexp_for_sizeof (struct expression *, int *);
56 static struct value *evaluate_subexp_for_address (struct expression *,
59 static struct value *evaluate_subexp (struct type *, 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)
166 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
169 /* Evaluate an expression, avoiding all memory references
170 and getting a value whose type alone is correct. */
173 evaluate_type (struct expression *exp)
176 return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
179 /* Evaluate a subexpression, avoiding all memory references and
180 getting a value whose type alone is correct. */
183 evaluate_subexpression_type (struct expression *exp, int subexp)
185 return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
188 /* Extract a field operation from an expression. If the subexpression
189 of EXP starting at *SUBEXP is not a structure dereference
190 operation, return NULL. Otherwise, return the name of the
191 dereferenced field, and advance *SUBEXP to point to the
192 subexpression of the left-hand-side of the dereference. This is
193 used when completing field names. */
196 extract_field_op (struct expression *exp, int *subexp)
200 if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
201 && exp->elts[*subexp].opcode != STRUCTOP_PTR)
203 tem = longest_to_int (exp->elts[*subexp + 1].longconst);
204 result = &exp->elts[*subexp + 2].string;
205 (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1);
209 /* If the next expression is an OP_LABELED, skips past it,
210 returning the label. Otherwise, does nothing and returns NULL. */
213 get_label (struct expression *exp, int *pos)
215 if (exp->elts[*pos].opcode == OP_LABELED)
218 char *name = &exp->elts[pc + 2].string;
219 int tem = longest_to_int (exp->elts[pc + 1].longconst);
220 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
227 /* This function evaluates tuples (in (the deleted) Chill) or
228 brace-initializers (in C/C++) for structure types. */
230 static struct value *
231 evaluate_struct_tuple (struct value *struct_val,
232 struct expression *exp,
233 int *pos, enum noside noside, int nargs)
235 struct type *struct_type = check_typedef (value_type (struct_val));
236 struct type *substruct_type = struct_type;
237 struct type *field_type;
244 struct value *val = NULL;
249 /* Skip past the labels, and count them. */
250 while (get_label (exp, pos) != NULL)
255 char *label = get_label (exp, &pc);
258 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
261 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
262 if (field_name != NULL && strcmp (field_name, label) == 0)
265 subfieldno = fieldno;
266 substruct_type = struct_type;
270 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
273 char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
274 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
275 if ((field_name == 0 || *field_name == '\0')
276 && TYPE_CODE (field_type) == TYPE_CODE_UNION)
279 for (; variantno < TYPE_NFIELDS (field_type);
283 = TYPE_FIELD_TYPE (field_type, variantno);
284 if (TYPE_CODE (substruct_type) == TYPE_CODE_STRUCT)
287 subfieldno < TYPE_NFIELDS (substruct_type);
290 if (strcmp(TYPE_FIELD_NAME (substruct_type,
301 error (_("there is no field named %s"), label);
307 /* Unlabelled tuple element - go to next field. */
311 if (subfieldno >= TYPE_NFIELDS (substruct_type))
314 substruct_type = struct_type;
320 /* Skip static fields. */
321 while (fieldno < TYPE_NFIELDS (struct_type)
322 && TYPE_FIELD_STATIC_KIND (struct_type, fieldno))
324 subfieldno = fieldno;
325 if (fieldno >= TYPE_NFIELDS (struct_type))
326 error (_("too many initializers"));
327 field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
328 if (TYPE_CODE (field_type) == TYPE_CODE_UNION
329 && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
330 error (_("don't know which variant you want to set"));
334 /* Here, struct_type is the type of the inner struct,
335 while substruct_type is the type of the inner struct.
336 These are the same for normal structures, but a variant struct
337 contains anonymous union fields that contain substruct fields.
338 The value fieldno is the index of the top-level (normal or
339 anonymous union) field in struct_field, while the value
340 subfieldno is the index of the actual real (named inner) field
341 in substruct_type. */
343 field_type = TYPE_FIELD_TYPE (substruct_type, subfieldno);
345 val = evaluate_subexp (field_type, exp, pos, noside);
347 /* Now actually set the field in struct_val. */
349 /* Assign val to field fieldno. */
350 if (value_type (val) != field_type)
351 val = value_cast (field_type, val);
353 bitsize = TYPE_FIELD_BITSIZE (substruct_type, subfieldno);
354 bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
356 bitpos += TYPE_FIELD_BITPOS (substruct_type, subfieldno);
357 addr = value_contents_writeable (struct_val) + bitpos / 8;
359 modify_field (addr, value_as_long (val),
360 bitpos % 8, bitsize);
362 memcpy (addr, value_contents (val),
363 TYPE_LENGTH (value_type (val)));
365 while (--nlabels > 0);
370 /* Recursive helper function for setting elements of array tuples for
371 (the deleted) Chill. The target is ARRAY (which has bounds
372 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
373 and NOSIDE are as usual. Evaluates index expresions and sets the
374 specified element(s) of ARRAY to ELEMENT. Returns last index
378 init_array_element (struct value *array, struct value *element,
379 struct expression *exp, int *pos,
380 enum noside noside, LONGEST low_bound, LONGEST high_bound)
383 int element_size = TYPE_LENGTH (value_type (element));
384 if (exp->elts[*pos].opcode == BINOP_COMMA)
387 init_array_element (array, element, exp, pos, noside,
388 low_bound, high_bound);
389 return init_array_element (array, element,
390 exp, pos, noside, low_bound, high_bound);
392 else if (exp->elts[*pos].opcode == BINOP_RANGE)
396 low = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
397 high = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
398 if (low < low_bound || high > high_bound)
399 error (_("tuple range index out of range"));
400 for (index = low; index <= high; index++)
402 memcpy (value_contents_raw (array)
403 + (index - low_bound) * element_size,
404 value_contents (element), element_size);
409 index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
410 if (index < low_bound || index > high_bound)
411 error (_("tuple index out of range"));
412 memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
413 value_contents (element), element_size);
419 value_f90_subarray (struct value *array,
420 struct expression *exp, int *pos, enum noside noside)
423 LONGEST low_bound, high_bound;
424 struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
425 enum f90_range_type range_type = longest_to_int (exp->elts[pc].longconst);
429 if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
430 low_bound = TYPE_LOW_BOUND (range);
432 low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
434 if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
435 high_bound = TYPE_HIGH_BOUND (range);
437 high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
439 return value_slice (array, low_bound, high_bound - low_bound + 1);
443 evaluate_subexp_standard (struct type *expect_type,
444 struct expression *exp, int *pos,
449 int pc, pc2 = 0, oldpos;
450 struct value *arg1 = NULL;
451 struct value *arg2 = NULL;
455 struct value **argvec;
456 int upper, lower, retcode;
460 struct type **arg_types;
464 op = exp->elts[pc].opcode;
469 tem = longest_to_int (exp->elts[pc + 2].longconst);
470 (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
471 if (noside == EVAL_SKIP)
473 arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
474 &exp->elts[pc + 3].string,
477 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
482 return value_from_longest (exp->elts[pc + 1].type,
483 exp->elts[pc + 2].longconst);
487 return value_from_double (exp->elts[pc + 1].type,
488 exp->elts[pc + 2].doubleconst);
492 return value_from_decfloat (exp->elts[pc + 1].type,
493 exp->elts[pc + 2].decfloatconst);
497 if (noside == EVAL_SKIP)
500 /* JYG: We used to just return value_zero of the symbol type
501 if we're asked to avoid side effects. Otherwise we return
502 value_of_variable (...). However I'm not sure if
503 value_of_variable () has any side effect.
504 We need a full value object returned here for whatis_exp ()
505 to call evaluate_type () and then pass the full value to
506 value_rtti_target_type () if we are dealing with a pointer
507 or reference to a base class and print object is on. */
510 volatile struct gdb_exception except;
511 struct value *ret = NULL;
513 TRY_CATCH (except, RETURN_MASK_ERROR)
515 ret = value_of_variable (exp->elts[pc + 2].symbol,
516 exp->elts[pc + 1].block);
519 if (except.reason < 0)
521 if (noside == EVAL_AVOID_SIDE_EFFECTS)
522 ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol), not_lval);
524 throw_exception (except);
533 access_value_history (longest_to_int (exp->elts[pc + 1].longconst));
537 const char *name = &exp->elts[pc + 2].string;
541 (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
542 regno = user_reg_map_name_to_regnum (current_gdbarch,
543 name, strlen (name));
545 error (_("Register $%s not available."), name);
547 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
548 a value with the appropriate register type. Unfortunately,
549 we don't have easy access to the type of user registers.
550 So for these registers, we fetch the register value regardless
551 of the evaluation mode. */
552 if (noside == EVAL_AVOID_SIDE_EFFECTS
553 && regno < gdbarch_num_regs (current_gdbarch)
554 + gdbarch_num_pseudo_regs (current_gdbarch))
555 val = value_zero (register_type (current_gdbarch, regno), not_lval);
557 val = value_of_register (regno, get_selected_frame (NULL));
559 error (_("Value of register %s not available."), name);
565 type = language_bool_type (exp->language_defn, exp->gdbarch);
566 return value_from_longest (type, exp->elts[pc + 1].longconst);
570 return value_of_internalvar (exp->elts[pc + 1].internalvar);
573 tem = longest_to_int (exp->elts[pc + 1].longconst);
574 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
575 if (noside == EVAL_SKIP)
577 return value_string (&exp->elts[pc + 2].string, tem);
579 case OP_OBJC_NSSTRING: /* Objective C Foundation Class NSString constant. */
580 tem = longest_to_int (exp->elts[pc + 1].longconst);
581 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
582 if (noside == EVAL_SKIP)
586 return (struct value *) value_nsstring (&exp->elts[pc + 2].string, tem + 1);
589 tem = longest_to_int (exp->elts[pc + 1].longconst);
591 += 3 + BYTES_TO_EXP_ELEM ((tem + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
592 if (noside == EVAL_SKIP)
594 return value_bitstring (&exp->elts[pc + 2].string, tem);
599 tem2 = longest_to_int (exp->elts[pc + 1].longconst);
600 tem3 = longest_to_int (exp->elts[pc + 2].longconst);
601 nargs = tem3 - tem2 + 1;
602 type = expect_type ? check_typedef (expect_type) : NULL_TYPE;
604 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
605 && TYPE_CODE (type) == TYPE_CODE_STRUCT)
607 struct value *rec = allocate_value (expect_type);
608 memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
609 return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
612 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
613 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
615 struct type *range_type = TYPE_FIELD_TYPE (type, 0);
616 struct type *element_type = TYPE_TARGET_TYPE (type);
617 struct value *array = allocate_value (expect_type);
618 int element_size = TYPE_LENGTH (check_typedef (element_type));
619 LONGEST low_bound, high_bound, index;
620 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
623 high_bound = (TYPE_LENGTH (type) / element_size) - 1;
626 memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type));
627 for (tem = nargs; --nargs >= 0;)
629 struct value *element;
631 if (exp->elts[*pos].opcode == BINOP_RANGE)
634 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
636 element = evaluate_subexp (element_type, exp, pos, noside);
637 if (value_type (element) != element_type)
638 element = value_cast (element_type, element);
641 int continue_pc = *pos;
643 index = init_array_element (array, element, exp, pos, noside,
644 low_bound, high_bound);
649 if (index > high_bound)
650 /* to avoid memory corruption */
651 error (_("Too many array elements"));
652 memcpy (value_contents_raw (array)
653 + (index - low_bound) * element_size,
654 value_contents (element),
662 if (expect_type != NULL_TYPE && noside != EVAL_SKIP
663 && TYPE_CODE (type) == TYPE_CODE_SET)
665 struct value *set = allocate_value (expect_type);
666 gdb_byte *valaddr = value_contents_raw (set);
667 struct type *element_type = TYPE_INDEX_TYPE (type);
668 struct type *check_type = element_type;
669 LONGEST low_bound, high_bound;
671 /* get targettype of elementtype */
672 while (TYPE_CODE (check_type) == TYPE_CODE_RANGE ||
673 TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
674 check_type = TYPE_TARGET_TYPE (check_type);
676 if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
677 error (_("(power)set type with unknown size"));
678 memset (valaddr, '\0', TYPE_LENGTH (type));
679 for (tem = 0; tem < nargs; tem++)
681 LONGEST range_low, range_high;
682 struct type *range_low_type, *range_high_type;
683 struct value *elem_val;
684 if (exp->elts[*pos].opcode == BINOP_RANGE)
687 elem_val = evaluate_subexp (element_type, exp, pos, noside);
688 range_low_type = value_type (elem_val);
689 range_low = value_as_long (elem_val);
690 elem_val = evaluate_subexp (element_type, exp, pos, noside);
691 range_high_type = value_type (elem_val);
692 range_high = value_as_long (elem_val);
696 elem_val = evaluate_subexp (element_type, exp, pos, noside);
697 range_low_type = range_high_type = value_type (elem_val);
698 range_low = range_high = value_as_long (elem_val);
700 /* check types of elements to avoid mixture of elements from
701 different types. Also check if type of element is "compatible"
702 with element type of powerset */
703 if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
704 range_low_type = TYPE_TARGET_TYPE (range_low_type);
705 if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
706 range_high_type = TYPE_TARGET_TYPE (range_high_type);
707 if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type)) ||
708 (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM &&
709 (range_low_type != range_high_type)))
710 /* different element modes */
711 error (_("POWERSET tuple elements of different mode"));
712 if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type)) ||
713 (TYPE_CODE (check_type) == TYPE_CODE_ENUM &&
714 range_low_type != check_type))
715 error (_("incompatible POWERSET tuple elements"));
716 if (range_low > range_high)
718 warning (_("empty POWERSET tuple range"));
721 if (range_low < low_bound || range_high > high_bound)
722 error (_("POWERSET tuple element out of range"));
723 range_low -= low_bound;
724 range_high -= low_bound;
725 for (; range_low <= range_high; range_low++)
727 int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
728 if (gdbarch_bits_big_endian (current_gdbarch))
729 bit_index = TARGET_CHAR_BIT - 1 - bit_index;
730 valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
737 argvec = (struct value **) alloca (sizeof (struct value *) * nargs);
738 for (tem = 0; tem < nargs; tem++)
740 /* Ensure that array expressions are coerced into pointer objects. */
741 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
743 if (noside == EVAL_SKIP)
745 return value_array (tem2, tem3, argvec);
749 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
751 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
753 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
754 if (noside == EVAL_SKIP)
756 return value_slice (array, lowbound, upper - lowbound + 1);
759 case TERNOP_SLICE_COUNT:
761 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
763 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
765 = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
766 return value_slice (array, lowbound, length);
770 /* Skip third and second args to evaluate the first one. */
771 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
772 if (value_logical_not (arg1))
774 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
775 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
779 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
780 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
784 case OP_OBJC_SELECTOR:
785 { /* Objective C @selector operator. */
786 char *sel = &exp->elts[pc + 2].string;
787 int len = longest_to_int (exp->elts[pc + 1].longconst);
789 (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
790 if (noside == EVAL_SKIP)
794 sel[len] = 0; /* Make sure it's terminated. */
795 return value_from_longest (lookup_pointer_type (builtin_type_void),
796 lookup_child_selector (sel));
799 case OP_OBJC_MSGCALL:
800 { /* Objective C message (method) call. */
802 static CORE_ADDR responds_selector = 0;
803 static CORE_ADDR method_selector = 0;
805 CORE_ADDR selector = 0;
807 int struct_return = 0;
810 static struct value *msg_send = NULL;
811 static struct value *msg_send_stret = NULL;
812 static int gnu_runtime = 0;
814 struct value *target = NULL;
815 struct value *method = NULL;
816 struct value *called_method = NULL;
818 struct type *selector_type = NULL;
820 struct value *ret = NULL;
823 selector = exp->elts[pc + 1].longconst;
824 nargs = exp->elts[pc + 2].longconst;
825 argvec = (struct value **) alloca (sizeof (struct value *)
830 selector_type = lookup_pointer_type (builtin_type_void);
831 if (noside == EVAL_AVOID_SIDE_EFFECTS)
832 sub_no_side = EVAL_NORMAL;
834 sub_no_side = noside;
836 target = evaluate_subexp (selector_type, exp, pos, sub_no_side);
838 if (value_as_long (target) == 0)
839 return value_from_longest (builtin_type_long, 0);
841 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
844 /* Find the method dispatch (Apple runtime) or method lookup
845 (GNU runtime) function for Objective-C. These will be used
846 to lookup the symbol information for the method. If we
847 can't find any symbol information, then we'll use these to
848 call the method, otherwise we can call the method
849 directly. The msg_send_stret function is used in the special
850 case of a method that returns a structure (Apple runtime
855 type = lookup_pointer_type (builtin_type_void);
856 type = lookup_function_type (type);
857 type = lookup_pointer_type (type);
858 type = lookup_function_type (type);
859 type = lookup_pointer_type (type);
861 msg_send = find_function_in_inferior ("objc_msg_lookup");
862 msg_send_stret = find_function_in_inferior ("objc_msg_lookup");
864 msg_send = value_from_pointer (type, value_as_address (msg_send));
865 msg_send_stret = value_from_pointer (type,
866 value_as_address (msg_send_stret));
870 msg_send = find_function_in_inferior ("objc_msgSend");
871 /* Special dispatcher for methods returning structs */
872 msg_send_stret = find_function_in_inferior ("objc_msgSend_stret");
875 /* Verify the target object responds to this method. The
876 standard top-level 'Object' class uses a different name for
877 the verification method than the non-standard, but more
878 often used, 'NSObject' class. Make sure we check for both. */
880 responds_selector = lookup_child_selector ("respondsToSelector:");
881 if (responds_selector == 0)
882 responds_selector = lookup_child_selector ("respondsTo:");
884 if (responds_selector == 0)
885 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
887 method_selector = lookup_child_selector ("methodForSelector:");
888 if (method_selector == 0)
889 method_selector = lookup_child_selector ("methodFor:");
891 if (method_selector == 0)
892 error (_("no 'methodFor:' or 'methodForSelector:' method"));
894 /* Call the verification method, to make sure that the target
895 class implements the desired method. */
897 argvec[0] = msg_send;
899 argvec[2] = value_from_longest (builtin_type_long, responds_selector);
900 argvec[3] = value_from_longest (builtin_type_long, selector);
903 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
906 /* Function objc_msg_lookup returns a pointer. */
908 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
910 if (value_as_long (ret) == 0)
911 error (_("Target does not respond to this message selector."));
913 /* Call "methodForSelector:" method, to get the address of a
914 function method that implements this selector for this
915 class. If we can find a symbol at that address, then we
916 know the return type, parameter types etc. (that's a good
919 argvec[0] = msg_send;
921 argvec[2] = value_from_longest (builtin_type_long, method_selector);
922 argvec[3] = value_from_longest (builtin_type_long, selector);
925 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
929 ret = call_function_by_hand (argvec[0], 3, argvec + 1);
932 /* ret should now be the selector. */
934 addr = value_as_long (ret);
937 struct symbol *sym = NULL;
938 /* Is it a high_level symbol? */
940 sym = find_pc_function (addr);
942 method = value_of_variable (sym, 0);
945 /* If we found a method with symbol information, check to see
946 if it returns a struct. Otherwise assume it doesn't. */
952 struct type *val_type;
954 funaddr = find_function_addr (method, &val_type);
956 b = block_for_pc (funaddr);
958 CHECK_TYPEDEF (val_type);
960 if ((val_type == NULL)
961 || (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
963 if (expect_type != NULL)
964 val_type = expect_type;
967 struct_return = using_struct_return (value_type (method), val_type);
969 else if (expect_type != NULL)
971 struct_return = using_struct_return (NULL,
972 check_typedef (expect_type));
975 /* Found a function symbol. Now we will substitute its
976 value in place of the message dispatcher (obj_msgSend),
977 so that we call the method directly instead of thru
978 the dispatcher. The main reason for doing this is that
979 we can now evaluate the return value and parameter values
980 according to their known data types, in case we need to
981 do things like promotion, dereferencing, special handling
982 of structs and doubles, etc.
984 We want to use the type signature of 'method', but still
985 jump to objc_msgSend() or objc_msgSend_stret() to better
986 mimic the behavior of the runtime. */
990 if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
991 error (_("method address has symbol information with non-function type; skipping"));
993 VALUE_ADDRESS (method) = value_as_address (msg_send_stret);
995 VALUE_ADDRESS (method) = value_as_address (msg_send);
996 called_method = method;
1001 called_method = msg_send_stret;
1003 called_method = msg_send;
1006 if (noside == EVAL_SKIP)
1009 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1011 /* If the return type doesn't look like a function type,
1012 call an error. This can happen if somebody tries to
1013 turn a variable into a function call. This is here
1014 because people often want to call, eg, strcmp, which
1015 gdb doesn't know is a function. If gdb isn't asked for
1016 it's opinion (ie. through "whatis"), it won't offer
1019 struct type *type = value_type (called_method);
1020 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1021 type = TYPE_TARGET_TYPE (type);
1022 type = TYPE_TARGET_TYPE (type);
1026 if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
1027 return allocate_value (expect_type);
1029 return allocate_value (type);
1032 error (_("Expression of type other than \"method returning ...\" used as a method"));
1035 /* Now depending on whether we found a symbol for the method,
1036 we will either call the runtime dispatcher or the method
1039 argvec[0] = called_method;
1041 argvec[2] = value_from_longest (builtin_type_long, selector);
1042 /* User-supplied arguments. */
1043 for (tem = 0; tem < nargs; tem++)
1044 argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
1045 argvec[tem + 3] = 0;
1047 if (gnu_runtime && (method != NULL))
1049 /* Function objc_msg_lookup returns a pointer. */
1050 deprecated_set_value_type (argvec[0],
1051 lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
1052 argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1055 ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
1062 op = exp->elts[*pos].opcode;
1063 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1064 /* Allocate arg vector, including space for the function to be
1065 called in argvec[0] and a terminating NULL */
1066 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
1067 if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1070 /* First, evaluate the structure into arg2 */
1073 if (noside == EVAL_SKIP)
1076 if (op == STRUCTOP_MEMBER)
1078 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1082 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1085 /* If the function is a virtual function, then the
1086 aggregate value (providing the structure) plays
1087 its part by providing the vtable. Otherwise,
1088 it is just along for the ride: call the function
1091 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1093 if (TYPE_CODE (check_typedef (value_type (arg1)))
1094 != TYPE_CODE_METHODPTR)
1095 error (_("Non-pointer-to-member value used in pointer-to-member "
1098 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1100 struct type *method_type = check_typedef (value_type (arg1));
1101 arg1 = value_zero (method_type, not_lval);
1104 arg1 = cplus_method_ptr_to_value (&arg2, arg1);
1106 /* Now, say which argument to start evaluating from */
1109 else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1111 /* Hair for method invocations */
1115 /* First, evaluate the structure into arg2 */
1117 tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
1118 *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
1119 if (noside == EVAL_SKIP)
1122 if (op == STRUCTOP_STRUCT)
1124 /* If v is a variable in a register, and the user types
1125 v.method (), this will produce an error, because v has
1128 A possible way around this would be to allocate a
1129 copy of the variable on the stack, copy in the
1130 contents, call the function, and copy out the
1131 contents. I.e. convert this from call by reference
1132 to call by copy-return (or whatever it's called).
1133 However, this does not work because it is not the
1134 same: the method being called could stash a copy of
1135 the address, and then future uses through that address
1136 (after the method returns) would be expected to
1137 use the variable itself, not some copy of it. */
1138 arg2 = evaluate_subexp_for_address (exp, pos, noside);
1142 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1144 /* Now, say which argument to start evaluating from */
1149 /* Non-method function call */
1151 argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
1153 type = value_type (argvec[0]);
1154 if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
1155 type = TYPE_TARGET_TYPE (type);
1156 if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
1158 for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
1160 /* pai: FIXME This seems to be coercing arguments before
1161 * overload resolution has been done! */
1162 argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
1168 /* Evaluate arguments */
1169 for (; tem <= nargs; tem++)
1171 /* Ensure that array expressions are coerced into pointer objects. */
1172 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1175 /* signal end of arglist */
1178 if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
1180 int static_memfuncp;
1183 /* Method invocation : stuff "this" as first parameter */
1185 /* Name of method from expression */
1186 strcpy (tstr, &exp->elts[pc2 + 2].string);
1188 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1190 /* Language is C++, do some overload resolution before evaluation */
1191 struct value *valp = NULL;
1193 /* Prepare list of argument types for overload resolution */
1194 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1195 for (ix = 1; ix <= nargs; ix++)
1196 arg_types[ix - 1] = value_type (argvec[ix]);
1198 (void) find_overload_match (arg_types, nargs, tstr,
1199 1 /* method */ , 0 /* strict match */ ,
1200 &arg2 /* the object */ , NULL,
1201 &valp, NULL, &static_memfuncp);
1204 argvec[1] = arg2; /* the ``this'' pointer */
1205 argvec[0] = valp; /* use the method found after overload resolution */
1208 /* Non-C++ case -- or no overload resolution */
1210 struct value *temp = arg2;
1211 argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
1213 op == STRUCTOP_STRUCT
1214 ? "structure" : "structure pointer");
1215 /* value_struct_elt updates temp with the correct value
1216 of the ``this'' pointer if necessary, so modify argvec[1] to
1217 reflect any ``this'' changes. */
1218 arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
1219 VALUE_ADDRESS (temp) + value_offset (temp)
1220 + value_embedded_offset (temp));
1221 argvec[1] = arg2; /* the ``this'' pointer */
1224 if (static_memfuncp)
1226 argvec[1] = argvec[0];
1231 else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
1236 else if (op == OP_VAR_VALUE)
1238 /* Non-member function being called */
1239 /* fn: This can only be done for C++ functions. A C-style function
1240 in a C++ program, for instance, does not have the fields that
1241 are expected here */
1243 if (overload_resolution && (exp->language_defn->la_language == language_cplus))
1245 /* Language is C++, do some overload resolution before evaluation */
1246 struct symbol *symp;
1248 /* Prepare list of argument types for overload resolution */
1249 arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
1250 for (ix = 1; ix <= nargs; ix++)
1251 arg_types[ix - 1] = value_type (argvec[ix]);
1253 (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
1254 0 /* not method */ , 0 /* strict match */ ,
1255 NULL, exp->elts[save_pos1+2].symbol /* the function */ ,
1258 /* Now fix the expression being evaluated */
1259 exp->elts[save_pos1+2].symbol = symp;
1260 argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
1264 /* Not C++, or no overload resolution allowed */
1265 /* nothing to be done; argvec already correctly set up */
1270 /* It is probably a C-style function */
1271 /* nothing to be done; argvec already correctly set up */
1276 if (noside == EVAL_SKIP)
1278 if (argvec[0] == NULL)
1279 error (_("Cannot evaluate function -- may be inlined"));
1280 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1282 /* If the return type doesn't look like a function type, call an
1283 error. This can happen if somebody tries to turn a variable into
1284 a function call. This is here because people often want to
1285 call, eg, strcmp, which gdb doesn't know is a function. If
1286 gdb isn't asked for it's opinion (ie. through "whatis"),
1287 it won't offer it. */
1289 struct type *ftype =
1290 TYPE_TARGET_TYPE (value_type (argvec[0]));
1293 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
1295 error (_("Expression of type other than \"Function returning ...\" used as function"));
1297 return call_function_by_hand (argvec[0], nargs, argvec + 1);
1298 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1300 case OP_F77_UNDETERMINED_ARGLIST:
1302 /* Remember that in F77, functions, substring ops and
1303 array subscript operations cannot be disambiguated
1304 at parse time. We have made all array subscript operations,
1305 substring operations as well as function calls come here
1306 and we now have to discover what the heck this thing actually was.
1307 If it is a function, we process just as if we got an OP_FUNCALL. */
1309 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1312 /* First determine the type code we are dealing with. */
1313 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1314 type = check_typedef (value_type (arg1));
1315 code = TYPE_CODE (type);
1317 if (code == TYPE_CODE_PTR)
1319 /* Fortran always passes variable to subroutines as pointer.
1320 So we need to look into its target type to see if it is
1321 array, string or function. If it is, we need to switch
1322 to the target value the original one points to. */
1323 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1325 if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
1326 || TYPE_CODE (target_type) == TYPE_CODE_STRING
1327 || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
1329 arg1 = value_ind (arg1);
1330 type = check_typedef (value_type (arg1));
1331 code = TYPE_CODE (type);
1337 case TYPE_CODE_ARRAY:
1338 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1339 return value_f90_subarray (arg1, exp, pos, noside);
1341 goto multi_f77_subscript;
1343 case TYPE_CODE_STRING:
1344 if (exp->elts[*pos].opcode == OP_F90_RANGE)
1345 return value_f90_subarray (arg1, exp, pos, noside);
1348 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1349 return value_subscript (arg1, arg2);
1353 case TYPE_CODE_FUNC:
1354 /* It's a function call. */
1355 /* Allocate arg vector, including space for the function to be
1356 called in argvec[0] and a terminating NULL */
1357 argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
1360 for (; tem <= nargs; tem++)
1361 argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
1362 argvec[tem] = 0; /* signal end of arglist */
1366 error (_("Cannot perform substring on this type"));
1370 /* We have a complex number, There should be 2 floating
1371 point numbers that compose it */
1373 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1374 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1376 return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type);
1378 case STRUCTOP_STRUCT:
1379 tem = longest_to_int (exp->elts[pc + 1].longconst);
1380 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1381 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1382 if (noside == EVAL_SKIP)
1384 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1385 return value_zero (lookup_struct_elt_type (value_type (arg1),
1386 &exp->elts[pc + 2].string,
1391 struct value *temp = arg1;
1392 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1397 tem = longest_to_int (exp->elts[pc + 1].longconst);
1398 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
1399 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1400 if (noside == EVAL_SKIP)
1403 /* JYG: if print object is on we need to replace the base type
1404 with rtti type in order to continue on with successful
1405 lookup of member / method only available in the rtti type. */
1407 struct type *type = value_type (arg1);
1408 struct type *real_type;
1409 int full, top, using_enc;
1411 if (objectprint && TYPE_TARGET_TYPE(type) &&
1412 (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
1414 real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
1417 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1418 real_type = lookup_pointer_type (real_type);
1420 real_type = lookup_reference_type (real_type);
1422 arg1 = value_cast (real_type, arg1);
1427 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1428 return value_zero (lookup_struct_elt_type (value_type (arg1),
1429 &exp->elts[pc + 2].string,
1434 struct value *temp = arg1;
1435 return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
1436 NULL, "structure pointer");
1439 case STRUCTOP_MEMBER:
1441 if (op == STRUCTOP_MEMBER)
1442 arg1 = evaluate_subexp_for_address (exp, pos, noside);
1444 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1446 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1448 if (noside == EVAL_SKIP)
1451 type = check_typedef (value_type (arg2));
1452 switch (TYPE_CODE (type))
1454 case TYPE_CODE_METHODPTR:
1455 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1456 return value_zero (TYPE_TARGET_TYPE (type), not_lval);
1459 arg2 = cplus_method_ptr_to_value (&arg1, arg2);
1460 gdb_assert (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR);
1461 return value_ind (arg2);
1464 case TYPE_CODE_MEMBERPTR:
1465 /* Now, convert these values to an address. */
1466 arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
1469 mem_offset = value_as_long (arg2);
1471 arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
1472 value_as_long (arg1) + mem_offset);
1473 return value_ind (arg3);
1476 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1480 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1481 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1482 if (noside == EVAL_SKIP)
1484 if (binop_user_defined_p (op, arg1, arg2))
1485 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1487 return value_concat (arg1, arg2);
1490 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1491 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1493 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1495 if (binop_user_defined_p (op, arg1, arg2))
1496 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1498 return value_assign (arg1, arg2);
1500 case BINOP_ASSIGN_MODIFY:
1502 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1503 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1504 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
1506 op = exp->elts[pc + 1].opcode;
1507 if (binop_user_defined_p (op, arg1, arg2))
1508 return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
1509 else if (op == BINOP_ADD)
1510 arg2 = value_add (arg1, arg2);
1511 else if (op == BINOP_SUB)
1512 arg2 = value_sub (arg1, arg2);
1514 arg2 = value_binop (arg1, arg2, op);
1515 return value_assign (arg1, arg2);
1518 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1519 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1520 if (noside == EVAL_SKIP)
1522 if (binop_user_defined_p (op, arg1, arg2))
1523 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1525 return value_add (arg1, arg2);
1528 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1529 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1530 if (noside == EVAL_SKIP)
1532 if (binop_user_defined_p (op, arg1, arg2))
1533 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1535 return value_sub (arg1, arg2);
1545 case BINOP_BITWISE_AND:
1546 case BINOP_BITWISE_IOR:
1547 case BINOP_BITWISE_XOR:
1548 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1549 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1550 if (noside == EVAL_SKIP)
1552 if (binop_user_defined_p (op, arg1, arg2))
1553 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1556 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1557 fudge arg2 to avoid division-by-zero, the caller is
1558 (theoretically) only looking for the type of the result. */
1559 if (noside == EVAL_AVOID_SIDE_EFFECTS
1560 /* ??? Do we really want to test for BINOP_MOD here?
1561 The implementation of value_binop gives it a well-defined
1564 || op == BINOP_INTDIV
1567 && value_logical_not (arg2))
1569 struct value *v_one, *retval;
1571 v_one = value_one (value_type (arg2), not_lval);
1572 retval = value_binop (arg1, v_one, op);
1576 return value_binop (arg1, arg2, op);
1580 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1581 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1582 if (noside == EVAL_SKIP)
1584 error (_("':' operator used in invalid context"));
1586 case BINOP_SUBSCRIPT:
1587 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1588 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1589 if (noside == EVAL_SKIP)
1591 if (binop_user_defined_p (op, arg1, arg2))
1592 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1595 /* If the user attempts to subscript something that is not an
1596 array or pointer type (like a plain int variable for example),
1597 then report this as an error. */
1599 arg1 = coerce_ref (arg1);
1600 type = check_typedef (value_type (arg1));
1601 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
1602 && TYPE_CODE (type) != TYPE_CODE_PTR)
1604 if (TYPE_NAME (type))
1605 error (_("cannot subscript something of type `%s'"),
1608 error (_("cannot subscript requested type"));
1611 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1612 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
1614 return value_subscript (arg1, arg2);
1618 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1619 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1620 if (noside == EVAL_SKIP)
1622 type = language_bool_type (exp->language_defn, exp->gdbarch);
1623 return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
1625 case MULTI_SUBSCRIPT:
1627 nargs = longest_to_int (exp->elts[pc + 1].longconst);
1628 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
1631 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1632 /* FIXME: EVAL_SKIP handling may not be correct. */
1633 if (noside == EVAL_SKIP)
1644 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1645 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1647 /* If the user attempts to subscript something that has no target
1648 type (like a plain int variable for example), then report this
1651 type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
1654 arg1 = value_zero (type, VALUE_LVAL (arg1));
1660 error (_("cannot subscript something of type `%s'"),
1661 TYPE_NAME (value_type (arg1)));
1665 if (binop_user_defined_p (op, arg1, arg2))
1667 arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside);
1671 arg1 = coerce_ref (arg1);
1672 type = check_typedef (value_type (arg1));
1674 switch (TYPE_CODE (type))
1677 case TYPE_CODE_ARRAY:
1678 case TYPE_CODE_STRING:
1679 arg1 = value_subscript (arg1, arg2);
1682 case TYPE_CODE_BITSTRING:
1683 type = language_bool_type (exp->language_defn, exp->gdbarch);
1684 arg1 = value_bitstring_subscript (type, arg1, arg2);
1688 if (TYPE_NAME (type))
1689 error (_("cannot subscript something of type `%s'"),
1692 error (_("cannot subscript requested type"));
1698 multi_f77_subscript:
1700 int subscript_array[MAX_FORTRAN_DIMS];
1701 int array_size_array[MAX_FORTRAN_DIMS];
1702 int ndimensions = 1, i;
1703 struct type *tmp_type;
1704 int offset_item; /* The array offset where the item lives */
1706 if (nargs > MAX_FORTRAN_DIMS)
1707 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
1709 tmp_type = check_typedef (value_type (arg1));
1710 ndimensions = calc_f77_array_dims (type);
1712 if (nargs != ndimensions)
1713 error (_("Wrong number of subscripts"));
1715 /* Now that we know we have a legal array subscript expression
1716 let us actually find out where this element exists in the array. */
1719 /* Take array indices left to right */
1720 for (i = 0; i < nargs; i++)
1722 /* Evaluate each subscript, It must be a legal integer in F77 */
1723 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
1725 /* Fill in the subscript and array size arrays */
1727 subscript_array[i] = value_as_long (arg2);
1730 /* Internal type of array is arranged right to left */
1731 for (i = 0; i < nargs; i++)
1733 retcode = f77_get_dynamic_upperbound (tmp_type, &upper);
1734 if (retcode == BOUND_FETCH_ERROR)
1735 error (_("Cannot obtain dynamic upper bound"));
1737 retcode = f77_get_dynamic_lowerbound (tmp_type, &lower);
1738 if (retcode == BOUND_FETCH_ERROR)
1739 error (_("Cannot obtain dynamic lower bound"));
1741 array_size_array[nargs - i - 1] = upper - lower + 1;
1743 /* Zero-normalize subscripts so that offsetting will work. */
1745 subscript_array[nargs - i - 1] -= lower;
1747 /* If we are at the bottom of a multidimensional
1748 array type then keep a ptr to the last ARRAY
1749 type around for use when calling value_subscript()
1750 below. This is done because we pretend to value_subscript
1751 that we actually have a one-dimensional array
1752 of base element type that we apply a simple
1756 tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
1759 /* Now let us calculate the offset for this item */
1761 offset_item = subscript_array[ndimensions - 1];
1763 for (i = ndimensions - 1; i > 0; --i)
1765 array_size_array[i - 1] * offset_item + subscript_array[i - 1];
1767 /* Construct a value node with the value of the offset */
1769 arg2 = value_from_longest (builtin_type_f_integer, offset_item);
1771 /* Let us now play a dirty trick: we will take arg1
1772 which is a value node pointing to the topmost level
1773 of the multidimensional array-set and pretend
1774 that it is actually a array of the final element
1775 type, this will ensure that value_subscript()
1776 returns the correct type value */
1778 deprecated_set_value_type (arg1, tmp_type);
1779 return value_subscripted_rvalue (arg1, arg2, 0);
1782 case BINOP_LOGICAL_AND:
1783 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1784 if (noside == EVAL_SKIP)
1786 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1791 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
1794 if (binop_user_defined_p (op, arg1, arg2))
1796 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1797 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1801 tem = value_logical_not (arg1);
1802 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
1803 (tem ? EVAL_SKIP : noside));
1804 type = language_bool_type (exp->language_defn, exp->gdbarch);
1805 return value_from_longest (type,
1806 (LONGEST) (!tem && !value_logical_not (arg2)));
1809 case BINOP_LOGICAL_OR:
1810 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1811 if (noside == EVAL_SKIP)
1813 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1818 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
1821 if (binop_user_defined_p (op, arg1, arg2))
1823 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1824 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1828 tem = value_logical_not (arg1);
1829 arg2 = evaluate_subexp (NULL_TYPE, exp, pos,
1830 (!tem ? EVAL_SKIP : noside));
1831 type = language_bool_type (exp->language_defn, exp->gdbarch);
1832 return value_from_longest (type,
1833 (LONGEST) (!tem || !value_logical_not (arg2)));
1837 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1838 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1839 if (noside == EVAL_SKIP)
1841 if (binop_user_defined_p (op, arg1, arg2))
1843 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1847 tem = value_equal (arg1, arg2);
1848 type = language_bool_type (exp->language_defn, exp->gdbarch);
1849 return value_from_longest (type, (LONGEST) tem);
1852 case BINOP_NOTEQUAL:
1853 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1854 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1855 if (noside == EVAL_SKIP)
1857 if (binop_user_defined_p (op, arg1, arg2))
1859 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1863 tem = value_equal (arg1, arg2);
1864 type = language_bool_type (exp->language_defn, exp->gdbarch);
1865 return value_from_longest (type, (LONGEST) ! tem);
1869 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1870 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1871 if (noside == EVAL_SKIP)
1873 if (binop_user_defined_p (op, arg1, arg2))
1875 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1879 tem = value_less (arg1, arg2);
1880 type = language_bool_type (exp->language_defn, exp->gdbarch);
1881 return value_from_longest (type, (LONGEST) tem);
1885 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1886 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1887 if (noside == EVAL_SKIP)
1889 if (binop_user_defined_p (op, arg1, arg2))
1891 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1895 tem = value_less (arg2, arg1);
1896 type = language_bool_type (exp->language_defn, exp->gdbarch);
1897 return value_from_longest (type, (LONGEST) tem);
1901 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1902 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1903 if (noside == EVAL_SKIP)
1905 if (binop_user_defined_p (op, arg1, arg2))
1907 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1911 tem = value_less (arg2, arg1) || value_equal (arg1, arg2);
1912 type = language_bool_type (exp->language_defn, exp->gdbarch);
1913 return value_from_longest (type, (LONGEST) tem);
1917 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1918 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
1919 if (noside == EVAL_SKIP)
1921 if (binop_user_defined_p (op, arg1, arg2))
1923 return value_x_binop (arg1, arg2, op, OP_NULL, noside);
1927 tem = value_less (arg1, arg2) || value_equal (arg1, arg2);
1928 type = language_bool_type (exp->language_defn, exp->gdbarch);
1929 return value_from_longest (type, (LONGEST) tem);
1933 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1934 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1935 if (noside == EVAL_SKIP)
1937 type = check_typedef (value_type (arg2));
1938 if (TYPE_CODE (type) != TYPE_CODE_INT)
1939 error (_("Non-integral right operand for \"@\" operator."));
1940 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1942 return allocate_repeat_value (value_type (arg1),
1943 longest_to_int (value_as_long (arg2)));
1946 return value_repeat (arg1, longest_to_int (value_as_long (arg2)));
1949 evaluate_subexp (NULL_TYPE, exp, pos, noside);
1950 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
1953 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1954 if (noside == EVAL_SKIP)
1956 if (unop_user_defined_p (op, arg1))
1957 return value_x_unop (arg1, op, noside);
1959 return value_pos (arg1);
1962 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1963 if (noside == EVAL_SKIP)
1965 if (unop_user_defined_p (op, arg1))
1966 return value_x_unop (arg1, op, noside);
1968 return value_neg (arg1);
1970 case UNOP_COMPLEMENT:
1971 /* C++: check for and handle destructor names. */
1972 op = exp->elts[*pos].opcode;
1974 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1975 if (noside == EVAL_SKIP)
1977 if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
1978 return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
1980 return value_complement (arg1);
1982 case UNOP_LOGICAL_NOT:
1983 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
1984 if (noside == EVAL_SKIP)
1986 if (unop_user_defined_p (op, arg1))
1987 return value_x_unop (arg1, op, noside);
1990 type = language_bool_type (exp->language_defn, exp->gdbarch);
1991 return value_from_longest (type, (LONGEST) value_logical_not (arg1));
1995 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
1996 expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type));
1997 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
1998 type = check_typedef (value_type (arg1));
1999 if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
2000 || TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
2001 error (_("Attempt to dereference pointer to member without an object"));
2002 if (noside == EVAL_SKIP)
2004 if (unop_user_defined_p (op, arg1))
2005 return value_x_unop (arg1, op, noside);
2006 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2008 type = check_typedef (value_type (arg1));
2009 if (TYPE_CODE (type) == TYPE_CODE_PTR
2010 || TYPE_CODE (type) == TYPE_CODE_REF
2011 /* In C you can dereference an array to get the 1st elt. */
2012 || TYPE_CODE (type) == TYPE_CODE_ARRAY
2014 return value_zero (TYPE_TARGET_TYPE (type),
2016 else if (TYPE_CODE (type) == TYPE_CODE_INT)
2017 /* GDB allows dereferencing an int. */
2018 return value_zero (builtin_type_int, lval_memory);
2020 error (_("Attempt to take contents of a non-pointer value."));
2022 return value_ind (arg1);
2025 /* C++: check for and handle pointer to members. */
2027 op = exp->elts[*pos].opcode;
2029 if (noside == EVAL_SKIP)
2031 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2036 struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
2041 if (noside == EVAL_SKIP)
2043 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
2046 return evaluate_subexp_for_sizeof (exp, pos);
2050 type = exp->elts[pc + 1].type;
2051 arg1 = evaluate_subexp (type, exp, pos, noside);
2052 if (noside == EVAL_SKIP)
2054 if (type != value_type (arg1))
2055 arg1 = value_cast (type, arg1);
2060 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2061 if (noside == EVAL_SKIP)
2063 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2064 return value_zero (exp->elts[pc + 1].type, lval_memory);
2066 return value_at_lazy (exp->elts[pc + 1].type,
2067 value_as_address (arg1));
2069 case UNOP_MEMVAL_TLS:
2071 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2072 if (noside == EVAL_SKIP)
2074 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2075 return value_zero (exp->elts[pc + 2].type, lval_memory);
2079 tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
2080 value_as_address (arg1));
2081 return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
2084 case UNOP_PREINCREMENT:
2085 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2086 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2088 else if (unop_user_defined_p (op, arg1))
2090 return value_x_unop (arg1, op, noside);
2094 arg2 = value_add (arg1, value_from_longest (builtin_type_char,
2096 return value_assign (arg1, arg2);
2099 case UNOP_PREDECREMENT:
2100 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2101 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2103 else if (unop_user_defined_p (op, arg1))
2105 return value_x_unop (arg1, op, noside);
2109 arg2 = value_sub (arg1, value_from_longest (builtin_type_char,
2111 return value_assign (arg1, arg2);
2114 case UNOP_POSTINCREMENT:
2115 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2116 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2118 else if (unop_user_defined_p (op, arg1))
2120 return value_x_unop (arg1, op, noside);
2124 arg2 = value_add (arg1, value_from_longest (builtin_type_char,
2126 value_assign (arg1, arg2);
2130 case UNOP_POSTDECREMENT:
2131 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
2132 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
2134 else if (unop_user_defined_p (op, arg1))
2136 return value_x_unop (arg1, op, noside);
2140 arg2 = value_sub (arg1, value_from_longest (builtin_type_char,
2142 value_assign (arg1, arg2);
2148 return value_of_this (1);
2152 return value_of_local ("self", 1);
2155 /* The value is not supposed to be used. This is here to make it
2156 easier to accommodate expressions that contain types. */
2158 if (noside == EVAL_SKIP)
2160 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
2161 return allocate_value (exp->elts[pc + 1].type);
2163 error (_("Attempt to use a type name as an expression"));
2166 /* Removing this case and compiling with gcc -Wall reveals that
2167 a lot of cases are hitting this case. Some of these should
2168 probably be removed from expression.h; others are legitimate
2169 expressions which are (apparently) not fully implemented.
2171 If there are any cases landing here which mean a user error,
2172 then they should be separate cases, with more descriptive
2176 GDB does not (yet) know how to evaluate that kind of expression"));
2180 return value_from_longest (builtin_type_long, (LONGEST) 1);
2183 /* Evaluate a subexpression of EXP, at index *POS,
2184 and return the address of that subexpression.
2185 Advance *POS over the subexpression.
2186 If the subexpression isn't an lvalue, get an error.
2187 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2188 then only the type of the result need be correct. */
2190 static struct value *
2191 evaluate_subexp_for_address (struct expression *exp, int *pos,
2201 op = exp->elts[pc].opcode;
2207 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2209 /* We can't optimize out "&*" if there's a user-defined operator*. */
2210 if (unop_user_defined_p (op, x))
2212 x = value_x_unop (x, op, noside);
2213 goto default_case_after_eval;
2220 return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
2221 evaluate_subexp (NULL_TYPE, exp, pos, noside));
2224 var = exp->elts[pc + 2].symbol;
2226 /* C++: The "address" of a reference should yield the address
2227 * of the object pointed to. Let value_addr() deal with it. */
2228 if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
2232 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2235 lookup_pointer_type (SYMBOL_TYPE (var));
2236 enum address_class sym_class = SYMBOL_CLASS (var);
2238 if (sym_class == LOC_CONST
2239 || sym_class == LOC_CONST_BYTES
2240 || sym_class == LOC_REGISTER)
2241 error (_("Attempt to take address of register or constant."));
2244 value_zero (type, not_lval);
2246 else if (symbol_read_needs_frame (var))
2250 block_innermost_frame (exp->elts[pc + 1].block));
2252 return locate_var_value (var, NULL);
2255 tem = longest_to_int (exp->elts[pc + 2].longconst);
2256 (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
2257 x = value_aggregate_elt (exp->elts[pc + 1].type,
2258 &exp->elts[pc + 3].string,
2261 error (_("There is no field named %s"), &exp->elts[pc + 3].string);
2266 x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
2267 default_case_after_eval:
2268 if (noside == EVAL_AVOID_SIDE_EFFECTS)
2270 struct type *type = check_typedef (value_type (x));
2272 if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
2273 return value_zero (lookup_pointer_type (value_type (x)),
2275 else if (TYPE_CODE (type) == TYPE_CODE_REF)
2276 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2279 error (_("Attempt to take address of value not located in memory."));
2281 return value_addr (x);
2285 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2286 When used in contexts where arrays will be coerced anyway, this is
2287 equivalent to `evaluate_subexp' but much faster because it avoids
2288 actually fetching array contents (perhaps obsolete now that we have
2291 Note that we currently only do the coercion for C expressions, where
2292 arrays are zero based and the coercion is correct. For other languages,
2293 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2294 to decide if coercion is appropriate.
2299 evaluate_subexp_with_coercion (struct expression *exp,
2300 int *pos, enum noside noside)
2308 op = exp->elts[pc].opcode;
2313 var = exp->elts[pc + 2].symbol;
2314 if (TYPE_CODE (check_typedef (SYMBOL_TYPE (var))) == TYPE_CODE_ARRAY
2315 && CAST_IS_CONVERSION)
2320 (var, block_innermost_frame (exp->elts[pc + 1].block));
2321 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (check_typedef (SYMBOL_TYPE (var)))),
2327 return evaluate_subexp (NULL_TYPE, exp, pos, noside);
2331 /* Evaluate a subexpression of EXP, at index *POS,
2332 and return a value for the size of that subexpression.
2333 Advance *POS over the subexpression. */
2335 static struct value *
2336 evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
2344 op = exp->elts[pc].opcode;
2348 /* This case is handled specially
2349 so that we avoid creating a value for the result type.
2350 If the result type is very big, it's desirable not to
2351 create a value unnecessarily. */
2354 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2355 type = check_typedef (value_type (val));
2356 if (TYPE_CODE (type) != TYPE_CODE_PTR
2357 && TYPE_CODE (type) != TYPE_CODE_REF
2358 && TYPE_CODE (type) != TYPE_CODE_ARRAY)
2359 error (_("Attempt to take contents of a non-pointer value."));
2360 type = check_typedef (TYPE_TARGET_TYPE (type));
2361 return value_from_longest (builtin_type_int, (LONGEST)
2362 TYPE_LENGTH (type));
2366 type = check_typedef (exp->elts[pc + 1].type);
2367 return value_from_longest (builtin_type_int,
2368 (LONGEST) TYPE_LENGTH (type));
2372 type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
2374 value_from_longest (builtin_type_int, (LONGEST) TYPE_LENGTH (type));
2377 val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
2378 return value_from_longest (builtin_type_int,
2379 (LONGEST) TYPE_LENGTH (value_type (val)));
2383 /* Parse a type expression in the string [P..P+LENGTH). */
2386 parse_and_eval_type (char *p, int length)
2388 char *tmp = (char *) alloca (length + 4);
2389 struct expression *expr;
2391 memcpy (tmp + 1, p, length);
2392 tmp[length + 1] = ')';
2393 tmp[length + 2] = '0';
2394 tmp[length + 3] = '\0';
2395 expr = parse_expression (tmp);
2396 if (expr->elts[0].opcode != UNOP_CAST)
2397 error (_("Internal error in eval_type."));
2398 return expr->elts[1].type;
2402 calc_f77_array_dims (struct type *array_type)
2405 struct type *tmp_type;
2407 if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
2408 error (_("Can't get dimensions for a non-array type"));
2410 tmp_type = array_type;
2412 while ((tmp_type = TYPE_TARGET_TYPE (tmp_type)))
2414 if (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY)