1 /* Parse expressions for GDB.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 Modified from expread.y by the Department of Computer Science at the
6 State University of New York at Buffalo, 1991.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* Parse an expression from text in a string,
24 and return the result as a struct expression pointer.
25 That structure contains arithmetic operations in reverse polish,
26 with constants represented by operations that are followed by special data.
27 See expression.h for the details of the format.
28 What is important here is that it can be built up sequentially
29 during the process of parsing; the lower levels of the tree always
30 come first in the result. */
34 #include "arch-utils.h"
35 #include "gdb_string.h"
39 #include "expression.h"
44 #include "parser-defs.h"
46 #include "symfile.h" /* for overlay functions */
49 #include "gdb_assert.h"
53 #include "exceptions.h"
54 #include "user-regs.h"
56 /* Standard set of definitions for printing, dumping, prefixifying,
57 * and evaluating expressions. */
59 const struct exp_descriptor exp_descriptor_standard
=
61 print_subexp_standard
,
62 operator_length_standard
,
63 operator_check_standard
,
65 dump_subexp_body_standard
,
66 evaluate_subexp_standard
69 /* Global variables declared in parser-defs.h (and commented there). */
70 struct expression
*expout
;
73 const struct block
*expression_context_block
;
74 CORE_ADDR expression_context_pc
;
75 const struct block
*innermost_block
;
77 static struct type_stack type_stack
;
83 /* True if parsing an expression to attempt completion. */
86 /* The index of the last struct expression directly before a '.' or
87 '->'. This is set when parsing and is only used when completing a
88 field name. It is -1 if no dereference operation was found. */
89 static int expout_last_struct
= -1;
91 /* If we are completing a tagged type name, this will be nonzero. */
92 static enum type_code expout_tag_completion_type
= TYPE_CODE_UNDEF
;
94 /* The token for tagged type name completion. */
95 static char *expout_completion_name
;
98 static unsigned int expressiondebug
= 0;
100 show_expressiondebug (struct ui_file
*file
, int from_tty
,
101 struct cmd_list_element
*c
, const char *value
)
103 fprintf_filtered (file
, _("Expression debugging is %s.\n"), value
);
107 /* Non-zero if an expression parser should set yydebug. */
111 show_parserdebug (struct ui_file
*file
, int from_tty
,
112 struct cmd_list_element
*c
, const char *value
)
114 fprintf_filtered (file
, _("Parser debugging is %s.\n"), value
);
118 static void free_funcalls (void *ignore
);
120 static int prefixify_subexp (struct expression
*, struct expression
*, int,
123 static struct expression
*parse_exp_in_context (const char **, CORE_ADDR
,
124 const struct block
*, int,
126 static struct expression
*parse_exp_in_context_1 (char **, CORE_ADDR
,
127 const struct block
*, int,
130 void _initialize_parse (void);
132 /* Data structure for saving values of arglist_len for function calls whose
133 arguments contain other function calls. */
137 struct funcall
*next
;
141 static struct funcall
*funcall_chain
;
143 /* Begin counting arguments for a function call,
144 saving the data about any containing call. */
151 new = (struct funcall
*) xmalloc (sizeof (struct funcall
));
152 new->next
= funcall_chain
;
153 new->arglist_len
= arglist_len
;
158 /* Return the number of arguments in a function call just terminated,
159 and restore the data for the containing function call. */
164 int val
= arglist_len
;
165 struct funcall
*call
= funcall_chain
;
167 funcall_chain
= call
->next
;
168 arglist_len
= call
->arglist_len
;
173 /* Free everything in the funcall chain.
174 Used when there is an error inside parsing. */
177 free_funcalls (void *ignore
)
179 struct funcall
*call
, *next
;
181 for (call
= funcall_chain
; call
; call
= next
)
188 /* This page contains the functions for adding data to the struct expression
189 being constructed. */
191 /* See definition in parser-defs.h. */
194 initialize_expout (int initial_size
, const struct language_defn
*lang
,
195 struct gdbarch
*gdbarch
)
197 expout_size
= initial_size
;
199 expout
= xmalloc (sizeof (struct expression
)
200 + EXP_ELEM_TO_BYTES (expout_size
));
201 expout
->language_defn
= lang
;
202 expout
->gdbarch
= gdbarch
;
205 /* See definition in parser-defs.h. */
208 reallocate_expout (void)
210 /* Record the actual number of expression elements, and then
211 reallocate the expression memory so that we free up any
214 expout
->nelts
= expout_ptr
;
215 expout
= xrealloc ((char *) expout
,
216 sizeof (struct expression
)
217 + EXP_ELEM_TO_BYTES (expout_ptr
));
220 /* Add one element to the end of the expression. */
222 /* To avoid a bug in the Sun 4 compiler, we pass things that can fit into
223 a register through here. */
226 write_exp_elt (const union exp_element
*expelt
)
228 if (expout_ptr
>= expout_size
)
231 expout
= (struct expression
*)
232 xrealloc ((char *) expout
, sizeof (struct expression
)
233 + EXP_ELEM_TO_BYTES (expout_size
));
235 expout
->elts
[expout_ptr
++] = *expelt
;
239 write_exp_elt_opcode (enum exp_opcode expelt
)
241 union exp_element tmp
;
243 memset (&tmp
, 0, sizeof (union exp_element
));
245 write_exp_elt (&tmp
);
249 write_exp_elt_sym (struct symbol
*expelt
)
251 union exp_element tmp
;
253 memset (&tmp
, 0, sizeof (union exp_element
));
255 write_exp_elt (&tmp
);
259 write_exp_elt_block (const struct block
*b
)
261 union exp_element tmp
;
263 memset (&tmp
, 0, sizeof (union exp_element
));
265 write_exp_elt (&tmp
);
269 write_exp_elt_objfile (struct objfile
*objfile
)
271 union exp_element tmp
;
273 memset (&tmp
, 0, sizeof (union exp_element
));
274 tmp
.objfile
= objfile
;
275 write_exp_elt (&tmp
);
279 write_exp_elt_longcst (LONGEST expelt
)
281 union exp_element tmp
;
283 memset (&tmp
, 0, sizeof (union exp_element
));
284 tmp
.longconst
= expelt
;
285 write_exp_elt (&tmp
);
289 write_exp_elt_dblcst (DOUBLEST expelt
)
291 union exp_element tmp
;
293 memset (&tmp
, 0, sizeof (union exp_element
));
294 tmp
.doubleconst
= expelt
;
295 write_exp_elt (&tmp
);
299 write_exp_elt_decfloatcst (gdb_byte expelt
[16])
301 union exp_element tmp
;
304 for (index
= 0; index
< 16; index
++)
305 tmp
.decfloatconst
[index
] = expelt
[index
];
307 write_exp_elt (&tmp
);
311 write_exp_elt_type (struct type
*expelt
)
313 union exp_element tmp
;
315 memset (&tmp
, 0, sizeof (union exp_element
));
317 write_exp_elt (&tmp
);
321 write_exp_elt_intern (struct internalvar
*expelt
)
323 union exp_element tmp
;
325 memset (&tmp
, 0, sizeof (union exp_element
));
326 tmp
.internalvar
= expelt
;
327 write_exp_elt (&tmp
);
330 /* Add a string constant to the end of the expression.
332 String constants are stored by first writing an expression element
333 that contains the length of the string, then stuffing the string
334 constant itself into however many expression elements are needed
335 to hold it, and then writing another expression element that contains
336 the length of the string. I.e. an expression element at each end of
337 the string records the string length, so you can skip over the
338 expression elements containing the actual string bytes from either
339 end of the string. Note that this also allows gdb to handle
340 strings with embedded null bytes, as is required for some languages.
342 Don't be fooled by the fact that the string is null byte terminated,
343 this is strictly for the convenience of debugging gdb itself.
344 Gdb does not depend up the string being null terminated, since the
345 actual length is recorded in expression elements at each end of the
346 string. The null byte is taken into consideration when computing how
347 many expression elements are required to hold the string constant, of
352 write_exp_string (struct stoken str
)
354 int len
= str
.length
;
358 /* Compute the number of expression elements required to hold the string
359 (including a null byte terminator), along with one expression element
360 at each end to record the actual string length (not including the
361 null byte terminator). */
363 lenelt
= 2 + BYTES_TO_EXP_ELEM (len
+ 1);
365 /* Ensure that we have enough available expression elements to store
368 if ((expout_ptr
+ lenelt
) >= expout_size
)
370 expout_size
= max (expout_size
* 2, expout_ptr
+ lenelt
+ 10);
371 expout
= (struct expression
*)
372 xrealloc ((char *) expout
, (sizeof (struct expression
)
373 + EXP_ELEM_TO_BYTES (expout_size
)));
376 /* Write the leading length expression element (which advances the current
377 expression element index), then write the string constant followed by a
378 terminating null byte, and then write the trailing length expression
381 write_exp_elt_longcst ((LONGEST
) len
);
382 strdata
= (char *) &expout
->elts
[expout_ptr
];
383 memcpy (strdata
, str
.ptr
, len
);
384 *(strdata
+ len
) = '\0';
385 expout_ptr
+= lenelt
- 2;
386 write_exp_elt_longcst ((LONGEST
) len
);
389 /* Add a vector of string constants to the end of the expression.
391 This adds an OP_STRING operation, but encodes the contents
392 differently from write_exp_string. The language is expected to
393 handle evaluation of this expression itself.
395 After the usual OP_STRING header, TYPE is written into the
396 expression as a long constant. The interpretation of this field is
397 up to the language evaluator.
399 Next, each string in VEC is written. The length is written as a
400 long constant, followed by the contents of the string. */
403 write_exp_string_vector (int type
, struct stoken_vector
*vec
)
407 /* Compute the size. We compute the size in number of slots to
408 avoid issues with string padding. */
410 for (i
= 0; i
< vec
->len
; ++i
)
412 /* One slot for the length of this element, plus the number of
413 slots needed for this string. */
414 n_slots
+= 1 + BYTES_TO_EXP_ELEM (vec
->tokens
[i
].length
);
417 /* One more slot for the type of the string. */
420 /* Now compute a phony string length. */
421 len
= EXP_ELEM_TO_BYTES (n_slots
) - 1;
424 if ((expout_ptr
+ n_slots
) >= expout_size
)
426 expout_size
= max (expout_size
* 2, expout_ptr
+ n_slots
+ 10);
427 expout
= (struct expression
*)
428 xrealloc ((char *) expout
, (sizeof (struct expression
)
429 + EXP_ELEM_TO_BYTES (expout_size
)));
432 write_exp_elt_opcode (OP_STRING
);
433 write_exp_elt_longcst (len
);
434 write_exp_elt_longcst (type
);
436 for (i
= 0; i
< vec
->len
; ++i
)
438 write_exp_elt_longcst (vec
->tokens
[i
].length
);
439 memcpy (&expout
->elts
[expout_ptr
], vec
->tokens
[i
].ptr
,
440 vec
->tokens
[i
].length
);
441 expout_ptr
+= BYTES_TO_EXP_ELEM (vec
->tokens
[i
].length
);
444 write_exp_elt_longcst (len
);
445 write_exp_elt_opcode (OP_STRING
);
448 /* Add a bitstring constant to the end of the expression.
450 Bitstring constants are stored by first writing an expression element
451 that contains the length of the bitstring (in bits), then stuffing the
452 bitstring constant itself into however many expression elements are
453 needed to hold it, and then writing another expression element that
454 contains the length of the bitstring. I.e. an expression element at
455 each end of the bitstring records the bitstring length, so you can skip
456 over the expression elements containing the actual bitstring bytes from
457 either end of the bitstring. */
460 write_exp_bitstring (struct stoken str
)
462 int bits
= str
.length
; /* length in bits */
463 int len
= (bits
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
;
467 /* Compute the number of expression elements required to hold the bitstring,
468 along with one expression element at each end to record the actual
469 bitstring length in bits. */
471 lenelt
= 2 + BYTES_TO_EXP_ELEM (len
);
473 /* Ensure that we have enough available expression elements to store
476 if ((expout_ptr
+ lenelt
) >= expout_size
)
478 expout_size
= max (expout_size
* 2, expout_ptr
+ lenelt
+ 10);
479 expout
= (struct expression
*)
480 xrealloc ((char *) expout
, (sizeof (struct expression
)
481 + EXP_ELEM_TO_BYTES (expout_size
)));
484 /* Write the leading length expression element (which advances the current
485 expression element index), then write the bitstring constant, and then
486 write the trailing length expression element. */
488 write_exp_elt_longcst ((LONGEST
) bits
);
489 strdata
= (char *) &expout
->elts
[expout_ptr
];
490 memcpy (strdata
, str
.ptr
, len
);
491 expout_ptr
+= lenelt
- 2;
492 write_exp_elt_longcst ((LONGEST
) bits
);
495 /* Add the appropriate elements for a minimal symbol to the end of
499 write_exp_msymbol (struct minimal_symbol
*msymbol
)
501 struct objfile
*objfile
= msymbol_objfile (msymbol
);
502 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
504 CORE_ADDR addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
505 struct obj_section
*section
= SYMBOL_OBJ_SECTION (msymbol
);
506 enum minimal_symbol_type type
= MSYMBOL_TYPE (msymbol
);
509 /* The minimal symbol might point to a function descriptor;
510 resolve it to the actual code address instead. */
511 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
, addr
, ¤t_target
);
514 struct minimal_symbol
*ifunc_msym
= lookup_minimal_symbol_by_pc (pc
);
516 /* In this case, assume we have a code symbol instead of
519 if (ifunc_msym
!= NULL
&& MSYMBOL_TYPE (ifunc_msym
) == mst_text_gnu_ifunc
520 && SYMBOL_VALUE_ADDRESS (ifunc_msym
) == pc
)
522 /* A function descriptor has been resolved but PC is still in the
523 STT_GNU_IFUNC resolver body (such as because inferior does not
524 run to be able to call it). */
526 type
= mst_text_gnu_ifunc
;
534 if (overlay_debugging
)
535 addr
= symbol_overlayed_address (addr
, section
);
537 write_exp_elt_opcode (OP_LONG
);
538 /* Let's make the type big enough to hold a 64-bit address. */
539 write_exp_elt_type (objfile_type (objfile
)->builtin_core_addr
);
540 write_exp_elt_longcst ((LONGEST
) addr
);
541 write_exp_elt_opcode (OP_LONG
);
543 if (section
&& section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
)
545 write_exp_elt_opcode (UNOP_MEMVAL_TLS
);
546 write_exp_elt_objfile (objfile
);
547 write_exp_elt_type (objfile_type (objfile
)->nodebug_tls_symbol
);
548 write_exp_elt_opcode (UNOP_MEMVAL_TLS
);
552 write_exp_elt_opcode (UNOP_MEMVAL
);
557 case mst_solib_trampoline
:
558 write_exp_elt_type (objfile_type (objfile
)->nodebug_text_symbol
);
561 case mst_text_gnu_ifunc
:
562 write_exp_elt_type (objfile_type (objfile
)
563 ->nodebug_text_gnu_ifunc_symbol
);
570 write_exp_elt_type (objfile_type (objfile
)->nodebug_data_symbol
);
573 case mst_slot_got_plt
:
574 write_exp_elt_type (objfile_type (objfile
)->nodebug_got_plt_symbol
);
578 write_exp_elt_type (objfile_type (objfile
)->nodebug_unknown_symbol
);
581 write_exp_elt_opcode (UNOP_MEMVAL
);
584 /* Mark the current index as the starting location of a structure
585 expression. This is used when completing on field names. */
588 mark_struct_expression (void)
590 gdb_assert (parse_completion
591 && expout_tag_completion_type
== TYPE_CODE_UNDEF
);
592 expout_last_struct
= expout_ptr
;
595 /* Indicate that the current parser invocation is completing a tag.
596 TAG is the type code of the tag, and PTR and LENGTH represent the
597 start of the tag name. */
600 mark_completion_tag (enum type_code tag
, const char *ptr
, int length
)
602 gdb_assert (parse_completion
603 && expout_tag_completion_type
== TYPE_CODE_UNDEF
604 && expout_completion_name
== NULL
605 && expout_last_struct
== -1);
606 gdb_assert (tag
== TYPE_CODE_UNION
607 || tag
== TYPE_CODE_STRUCT
608 || tag
== TYPE_CODE_CLASS
609 || tag
== TYPE_CODE_ENUM
);
610 expout_tag_completion_type
= tag
;
611 expout_completion_name
= xmalloc (length
+ 1);
612 memcpy (expout_completion_name
, ptr
, length
);
613 expout_completion_name
[length
] = '\0';
617 /* Recognize tokens that start with '$'. These include:
619 $regname A native register name or a "standard
622 $variable A convenience variable with a name chosen
625 $digits Value history with index <digits>, starting
626 from the first value which has index 1.
628 $$digits Value history with index <digits> relative
629 to the last value. I.e. $$0 is the last
630 value, $$1 is the one previous to that, $$2
631 is the one previous to $$1, etc.
633 $ | $0 | $$0 The last value in the value history.
635 $$ An abbreviation for the second to the last
636 value in the value history, I.e. $$1 */
639 write_dollar_variable (struct stoken str
)
641 struct symbol
*sym
= NULL
;
642 struct minimal_symbol
*msym
= NULL
;
643 struct internalvar
*isym
= NULL
;
645 /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
646 and $$digits (equivalent to $<-digits> if you could type that). */
650 /* Double dollar means negate the number and add -1 as well.
651 Thus $$ alone means -1. */
652 if (str
.length
>= 2 && str
.ptr
[1] == '$')
659 /* Just dollars (one or two). */
663 /* Is the rest of the token digits? */
664 for (; i
< str
.length
; i
++)
665 if (!(str
.ptr
[i
] >= '0' && str
.ptr
[i
] <= '9'))
669 i
= atoi (str
.ptr
+ 1 + negate
);
675 /* Handle tokens that refer to machine registers:
676 $ followed by a register name. */
677 i
= user_reg_map_name_to_regnum (parse_gdbarch
,
678 str
.ptr
+ 1, str
.length
- 1);
680 goto handle_register
;
682 /* Any names starting with $ are probably debugger internal variables. */
684 isym
= lookup_only_internalvar (copy_name (str
) + 1);
687 write_exp_elt_opcode (OP_INTERNALVAR
);
688 write_exp_elt_intern (isym
);
689 write_exp_elt_opcode (OP_INTERNALVAR
);
693 /* On some systems, such as HP-UX and hppa-linux, certain system routines
694 have names beginning with $ or $$. Check for those, first. */
696 sym
= lookup_symbol (copy_name (str
), (struct block
*) NULL
,
700 write_exp_elt_opcode (OP_VAR_VALUE
);
701 write_exp_elt_block (block_found
); /* set by lookup_symbol */
702 write_exp_elt_sym (sym
);
703 write_exp_elt_opcode (OP_VAR_VALUE
);
706 msym
= lookup_minimal_symbol (copy_name (str
), NULL
, NULL
);
709 write_exp_msymbol (msym
);
713 /* Any other names are assumed to be debugger internal variables. */
715 write_exp_elt_opcode (OP_INTERNALVAR
);
716 write_exp_elt_intern (create_internalvar (copy_name (str
) + 1));
717 write_exp_elt_opcode (OP_INTERNALVAR
);
720 write_exp_elt_opcode (OP_LAST
);
721 write_exp_elt_longcst ((LONGEST
) i
);
722 write_exp_elt_opcode (OP_LAST
);
725 write_exp_elt_opcode (OP_REGISTER
);
728 write_exp_string (str
);
729 write_exp_elt_opcode (OP_REGISTER
);
735 find_template_name_end (char *p
)
738 int just_seen_right
= 0;
739 int just_seen_colon
= 0;
740 int just_seen_space
= 0;
742 if (!p
|| (*p
!= '<'))
753 /* In future, may want to allow these?? */
756 depth
++; /* start nested template */
757 if (just_seen_colon
|| just_seen_right
|| just_seen_space
)
758 return 0; /* but not after : or :: or > or space */
761 if (just_seen_colon
|| just_seen_right
)
762 return 0; /* end a (nested?) template */
763 just_seen_right
= 1; /* but not after : or :: */
764 if (--depth
== 0) /* also disallow >>, insist on > > */
765 return ++p
; /* if outermost ended, return */
768 if (just_seen_space
|| (just_seen_colon
> 1))
769 return 0; /* nested class spec coming up */
770 just_seen_colon
++; /* we allow :: but not :::: */
775 if (!((*p
>= 'a' && *p
<= 'z') || /* allow token chars */
776 (*p
>= 'A' && *p
<= 'Z') ||
777 (*p
>= '0' && *p
<= '9') ||
778 (*p
== '_') || (*p
== ',') || /* commas for template args */
779 (*p
== '&') || (*p
== '*') || /* pointer and ref types */
780 (*p
== '(') || (*p
== ')') || /* function types */
781 (*p
== '[') || (*p
== ']'))) /* array types */
795 /* Return a null-terminated temporary copy of the name of a string token.
797 Tokens that refer to names do so with explicit pointer and length,
798 so they can share the storage that lexptr is parsing.
799 When it is necessary to pass a name to a function that expects
800 a null-terminated string, the substring is copied out
801 into a separate block of storage.
803 N.B. A single buffer is reused on each call. */
806 copy_name (struct stoken token
)
808 /* A temporary buffer for identifiers, so we can null-terminate them.
809 We allocate this with xrealloc. parse_exp_1 used to allocate with
810 alloca, using the size of the whole expression as a conservative
811 estimate of the space needed. However, macro expansion can
812 introduce names longer than the original expression; there's no
813 practical way to know beforehand how large that might be. */
814 static char *namecopy
;
815 static size_t namecopy_size
;
817 /* Make sure there's enough space for the token. */
818 if (namecopy_size
< token
.length
+ 1)
820 namecopy_size
= token
.length
+ 1;
821 namecopy
= xrealloc (namecopy
, token
.length
+ 1);
824 memcpy (namecopy
, token
.ptr
, token
.length
);
825 namecopy
[token
.length
] = 0;
831 /* See comments on parser-defs.h. */
834 prefixify_expression (struct expression
*expr
)
836 int len
= sizeof (struct expression
) + EXP_ELEM_TO_BYTES (expr
->nelts
);
837 struct expression
*temp
;
838 int inpos
= expr
->nelts
, outpos
= 0;
840 temp
= (struct expression
*) alloca (len
);
842 /* Copy the original expression into temp. */
843 memcpy (temp
, expr
, len
);
845 return prefixify_subexp (temp
, expr
, inpos
, outpos
);
848 /* Return the number of exp_elements in the postfix subexpression
849 of EXPR whose operator is at index ENDPOS - 1 in EXPR. */
852 length_of_subexp (struct expression
*expr
, int endpos
)
856 operator_length (expr
, endpos
, &oplen
, &args
);
860 oplen
+= length_of_subexp (expr
, endpos
- oplen
);
867 /* Sets *OPLENP to the length of the operator whose (last) index is
868 ENDPOS - 1 in EXPR, and sets *ARGSP to the number of arguments that
872 operator_length (const struct expression
*expr
, int endpos
, int *oplenp
,
875 expr
->language_defn
->la_exp_desc
->operator_length (expr
, endpos
,
879 /* Default value for operator_length in exp_descriptor vectors. */
882 operator_length_standard (const struct expression
*expr
, int endpos
,
883 int *oplenp
, int *argsp
)
887 enum f90_range_type range_type
;
891 error (_("?error in operator_length_standard"));
893 i
= (int) expr
->elts
[endpos
- 1].opcode
;
899 oplen
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
900 oplen
= 5 + BYTES_TO_EXP_ELEM (oplen
+ 1);
914 case OP_VAR_ENTRY_VALUE
:
924 case OP_F77_UNDETERMINED_ARGLIST
:
926 args
= 1 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
930 oplen
= 4 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
934 case OP_OBJC_MSGCALL
: /* Objective C message (method) call. */
936 args
= 1 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
945 case UNOP_DYNAMIC_CAST
:
946 case UNOP_REINTERPRET_CAST
:
947 case UNOP_MEMVAL_TYPE
:
959 case UNOP_MEMVAL_TLS
:
979 oplen
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
980 oplen
= 4 + BYTES_TO_EXP_ELEM (oplen
+ 1);
985 case STRUCTOP_STRUCT
:
992 case OP_OBJC_NSSTRING
: /* Objective C Foundation Class
993 NSString constant. */
994 case OP_OBJC_SELECTOR
: /* Objective C "@selector" pseudo-op. */
996 oplen
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
997 oplen
= 4 + BYTES_TO_EXP_ELEM (oplen
+ 1);
1002 args
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1003 args
-= longest_to_int (expr
->elts
[endpos
- 3].longconst
);
1013 case MULTI_SUBSCRIPT
:
1015 args
= 1 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1018 case BINOP_ASSIGN_MODIFY
:
1031 range_type
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1034 case LOW_BOUND_DEFAULT
:
1035 case HIGH_BOUND_DEFAULT
:
1038 case BOTH_BOUND_DEFAULT
:
1041 case NONE_BOUND_DEFAULT
:
1049 args
= 1 + (i
< (int) BINOP_END
);
1056 /* Copy the subexpression ending just before index INEND in INEXPR
1057 into OUTEXPR, starting at index OUTBEG.
1058 In the process, convert it from suffix to prefix form.
1059 If EXPOUT_LAST_STRUCT is -1, then this function always returns -1.
1060 Otherwise, it returns the index of the subexpression which is the
1061 left-hand-side of the expression at EXPOUT_LAST_STRUCT. */
1064 prefixify_subexp (struct expression
*inexpr
,
1065 struct expression
*outexpr
, int inend
, int outbeg
)
1073 operator_length (inexpr
, inend
, &oplen
, &args
);
1075 /* Copy the final operator itself, from the end of the input
1076 to the beginning of the output. */
1078 memcpy (&outexpr
->elts
[outbeg
], &inexpr
->elts
[inend
],
1079 EXP_ELEM_TO_BYTES (oplen
));
1082 if (expout_last_struct
== inend
)
1083 result
= outbeg
- oplen
;
1085 /* Find the lengths of the arg subexpressions. */
1086 arglens
= (int *) alloca (args
* sizeof (int));
1087 for (i
= args
- 1; i
>= 0; i
--)
1089 oplen
= length_of_subexp (inexpr
, inend
);
1094 /* Now copy each subexpression, preserving the order of
1095 the subexpressions, but prefixifying each one.
1096 In this loop, inend starts at the beginning of
1097 the expression this level is working on
1098 and marches forward over the arguments.
1099 outbeg does similarly in the output. */
1100 for (i
= 0; i
< args
; i
++)
1106 r
= prefixify_subexp (inexpr
, outexpr
, inend
, outbeg
);
1109 /* Return immediately. We probably have only parsed a
1110 partial expression, so we don't want to try to reverse
1111 the other operands. */
1120 /* Read an expression from the string *STRINGPTR points to,
1121 parse it, and return a pointer to a struct expression that we malloc.
1122 Use block BLOCK as the lexical context for variable names;
1123 if BLOCK is zero, use the block of the selected stack frame.
1124 Meanwhile, advance *STRINGPTR to point after the expression,
1125 at the first nonwhite character that is not part of the expression
1126 (possibly a null character).
1128 If COMMA is nonzero, stop if a comma is reached. */
1131 parse_exp_1 (const char **stringptr
, CORE_ADDR pc
, const struct block
*block
,
1134 return parse_exp_in_context (stringptr
, pc
, block
, comma
, 0, NULL
);
1137 static struct expression
*
1138 parse_exp_in_context (const char **stringptr
, CORE_ADDR pc
,
1139 const struct block
*block
,
1140 int comma
, int void_context_p
, int *out_subexp
)
1142 struct expression
*expr
;
1143 char *const_hack
= *stringptr
? xstrdup (*stringptr
) : NULL
;
1144 char *orig
= const_hack
;
1145 struct cleanup
*back_to
= make_cleanup (xfree
, const_hack
);
1147 expr
= parse_exp_in_context_1 (&const_hack
, pc
, block
, comma
,
1148 void_context_p
, out_subexp
);
1149 (*stringptr
) += const_hack
- orig
;
1150 do_cleanups (back_to
);
1154 /* As for parse_exp_1, except that if VOID_CONTEXT_P, then
1155 no value is expected from the expression.
1156 OUT_SUBEXP is set when attempting to complete a field name; in this
1157 case it is set to the index of the subexpression on the
1158 left-hand-side of the struct op. If not doing such completion, it
1159 is left untouched. */
1161 static struct expression
*
1162 parse_exp_in_context_1 (char **stringptr
, CORE_ADDR pc
,
1163 const struct block
*block
,
1164 int comma
, int void_context_p
, int *out_subexp
)
1166 volatile struct gdb_exception except
;
1167 struct cleanup
*old_chain
, *inner_chain
;
1168 const struct language_defn
*lang
= NULL
;
1171 lexptr
= *stringptr
;
1175 type_stack
.depth
= 0;
1176 expout_last_struct
= -1;
1177 expout_tag_completion_type
= TYPE_CODE_UNDEF
;
1178 xfree (expout_completion_name
);
1179 expout_completion_name
= NULL
;
1181 comma_terminates
= comma
;
1183 if (lexptr
== 0 || *lexptr
== 0)
1184 error_no_arg (_("expression to compute"));
1186 old_chain
= make_cleanup (free_funcalls
, 0 /*ignore*/);
1189 expression_context_block
= block
;
1191 /* If no context specified, try using the current frame, if any. */
1192 if (!expression_context_block
)
1193 expression_context_block
= get_selected_block (&expression_context_pc
);
1195 expression_context_pc
= BLOCK_START (expression_context_block
);
1197 expression_context_pc
= pc
;
1199 /* Fall back to using the current source static context, if any. */
1201 if (!expression_context_block
)
1203 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
1205 expression_context_block
1206 = BLOCKVECTOR_BLOCK (BLOCKVECTOR (cursal
.symtab
), STATIC_BLOCK
);
1207 if (expression_context_block
)
1208 expression_context_pc
= BLOCK_START (expression_context_block
);
1211 if (language_mode
== language_mode_auto
&& block
!= NULL
)
1213 /* Find the language associated to the given context block.
1214 Default to the current language if it can not be determined.
1216 Note that using the language corresponding to the current frame
1217 can sometimes give unexpected results. For instance, this
1218 routine is often called several times during the inferior
1219 startup phase to re-parse breakpoint expressions after
1220 a new shared library has been loaded. The language associated
1221 to the current frame at this moment is not relevant for
1222 the breakpoint. Using it would therefore be silly, so it seems
1223 better to rely on the current language rather than relying on
1224 the current frame language to parse the expression. That's why
1225 we do the following language detection only if the context block
1226 has been specifically provided. */
1227 struct symbol
*func
= block_linkage_function (block
);
1230 lang
= language_def (SYMBOL_LANGUAGE (func
));
1231 if (lang
== NULL
|| lang
->la_language
== language_unknown
)
1232 lang
= current_language
;
1235 lang
= current_language
;
1237 /* get_current_arch may reset CURRENT_LANGUAGE via select_frame.
1238 While we need CURRENT_LANGUAGE to be set to LANG (for lookup_symbol
1239 and others called from *.y) ensure CURRENT_LANGUAGE gets restored
1240 to the value matching SELECTED_FRAME as set by get_current_arch. */
1241 initialize_expout (10, lang
, get_current_arch ());
1242 inner_chain
= make_cleanup_restore_current_language ();
1243 set_language (lang
->la_language
);
1245 TRY_CATCH (except
, RETURN_MASK_ALL
)
1247 if (lang
->la_parser ())
1248 lang
->la_error (NULL
);
1250 if (except
.reason
< 0)
1252 if (! parse_completion
)
1255 throw_exception (except
);
1259 reallocate_expout ();
1261 /* Convert expression from postfix form as generated by yacc
1262 parser, to a prefix form. */
1264 if (expressiondebug
)
1265 dump_raw_expression (expout
, gdb_stdlog
,
1266 "before conversion to prefix form");
1268 subexp
= prefixify_expression (expout
);
1270 *out_subexp
= subexp
;
1272 lang
->la_post_parser (&expout
, void_context_p
);
1274 if (expressiondebug
)
1275 dump_prefix_expression (expout
, gdb_stdlog
);
1277 do_cleanups (inner_chain
);
1278 discard_cleanups (old_chain
);
1280 *stringptr
= lexptr
;
1284 /* Parse STRING as an expression, and complain if this fails
1285 to use up all of the contents of STRING. */
1288 parse_expression (const char *string
)
1290 struct expression
*exp
;
1292 exp
= parse_exp_1 (&string
, 0, 0, 0);
1294 error (_("Junk after end of expression."));
1298 /* Parse STRING as an expression. If parsing ends in the middle of a
1299 field reference, return the type of the left-hand-side of the
1300 reference; furthermore, if the parsing ends in the field name,
1301 return the field name in *NAME. If the parsing ends in the middle
1302 of a field reference, but the reference is somehow invalid, throw
1303 an exception. In all other cases, return NULL. Returned non-NULL
1304 *NAME must be freed by the caller. */
1307 parse_expression_for_completion (const char *string
, char **name
,
1308 enum type_code
*code
)
1310 struct expression
*exp
= NULL
;
1313 volatile struct gdb_exception except
;
1315 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1317 parse_completion
= 1;
1318 exp
= parse_exp_in_context (&string
, 0, 0, 0, 0, &subexp
);
1320 parse_completion
= 0;
1321 if (except
.reason
< 0 || ! exp
)
1324 if (expout_tag_completion_type
!= TYPE_CODE_UNDEF
)
1326 *code
= expout_tag_completion_type
;
1327 *name
= expout_completion_name
;
1328 expout_completion_name
= NULL
;
1332 if (expout_last_struct
== -1)
1338 *name
= extract_field_op (exp
, &subexp
);
1345 /* This might throw an exception. If so, we want to let it
1347 val
= evaluate_subexpression_type (exp
, subexp
);
1348 /* (*NAME) is a part of the EXP memory block freed below. */
1349 *name
= xstrdup (*name
);
1352 return value_type (val
);
1355 /* A post-parser that does nothing. */
1358 null_post_parser (struct expression
**exp
, int void_context_p
)
1362 /* Parse floating point value P of length LEN.
1363 Return 0 (false) if invalid, 1 (true) if valid.
1364 The successfully parsed number is stored in D.
1365 *SUFFIX points to the suffix of the number in P.
1367 NOTE: This accepts the floating point syntax that sscanf accepts. */
1370 parse_float (const char *p
, int len
, DOUBLEST
*d
, const char **suffix
)
1375 copy
= xmalloc (len
+ 1);
1376 memcpy (copy
, p
, len
);
1379 num
= sscanf (copy
, "%" DOUBLEST_SCAN_FORMAT
"%n", d
, &n
);
1382 /* The sscanf man page suggests not making any assumptions on the effect
1383 of %n on the result, so we don't.
1384 That is why we simply test num == 0. */
1392 /* Parse floating point value P of length LEN, using the C syntax for floats.
1393 Return 0 (false) if invalid, 1 (true) if valid.
1394 The successfully parsed number is stored in *D.
1395 Its type is taken from builtin_type (gdbarch) and is stored in *T. */
1398 parse_c_float (struct gdbarch
*gdbarch
, const char *p
, int len
,
1399 DOUBLEST
*d
, struct type
**t
)
1403 const struct builtin_type
*builtin_types
= builtin_type (gdbarch
);
1405 if (! parse_float (p
, len
, d
, &suffix
))
1408 suffix_len
= p
+ len
- suffix
;
1410 if (suffix_len
== 0)
1411 *t
= builtin_types
->builtin_double
;
1412 else if (suffix_len
== 1)
1414 /* Handle suffixes: 'f' for float, 'l' for long double. */
1415 if (tolower (*suffix
) == 'f')
1416 *t
= builtin_types
->builtin_float
;
1417 else if (tolower (*suffix
) == 'l')
1418 *t
= builtin_types
->builtin_long_double
;
1428 /* Stuff for maintaining a stack of types. Currently just used by C, but
1429 probably useful for any language which declares its types "backwards". */
1431 /* Ensure that there are HOWMUCH open slots on the type stack STACK. */
1434 type_stack_reserve (struct type_stack
*stack
, int howmuch
)
1436 if (stack
->depth
+ howmuch
>= stack
->size
)
1439 if (stack
->size
< howmuch
)
1440 stack
->size
= howmuch
;
1441 stack
->elements
= xrealloc (stack
->elements
,
1442 stack
->size
* sizeof (union type_stack_elt
));
1446 /* Ensure that there is a single open slot in the global type stack. */
1449 check_type_stack_depth (void)
1451 type_stack_reserve (&type_stack
, 1);
1454 /* A helper function for insert_type and insert_type_address_space.
1455 This does work of expanding the type stack and inserting the new
1456 element, ELEMENT, into the stack at location SLOT. */
1459 insert_into_type_stack (int slot
, union type_stack_elt element
)
1461 check_type_stack_depth ();
1463 if (slot
< type_stack
.depth
)
1464 memmove (&type_stack
.elements
[slot
+ 1], &type_stack
.elements
[slot
],
1465 (type_stack
.depth
- slot
) * sizeof (union type_stack_elt
));
1466 type_stack
.elements
[slot
] = element
;
1470 /* Insert a new type, TP, at the bottom of the type stack. If TP is
1471 tp_pointer or tp_reference, it is inserted at the bottom. If TP is
1472 a qualifier, it is inserted at slot 1 (just above a previous
1473 tp_pointer) if there is anything on the stack, or simply pushed if
1474 the stack is empty. Other values for TP are invalid. */
1477 insert_type (enum type_pieces tp
)
1479 union type_stack_elt element
;
1482 gdb_assert (tp
== tp_pointer
|| tp
== tp_reference
1483 || tp
== tp_const
|| tp
== tp_volatile
);
1485 /* If there is anything on the stack (we know it will be a
1486 tp_pointer), insert the qualifier above it. Otherwise, simply
1487 push this on the top of the stack. */
1488 if (type_stack
.depth
&& (tp
== tp_const
|| tp
== tp_volatile
))
1494 insert_into_type_stack (slot
, element
);
1498 push_type (enum type_pieces tp
)
1500 check_type_stack_depth ();
1501 type_stack
.elements
[type_stack
.depth
++].piece
= tp
;
1505 push_type_int (int n
)
1507 check_type_stack_depth ();
1508 type_stack
.elements
[type_stack
.depth
++].int_val
= n
;
1511 /* Insert a tp_space_identifier and the corresponding address space
1512 value into the stack. STRING is the name of an address space, as
1513 recognized by address_space_name_to_int. If the stack is empty,
1514 the new elements are simply pushed. If the stack is not empty,
1515 this function assumes that the first item on the stack is a
1516 tp_pointer, and the new values are inserted above the first
1520 insert_type_address_space (char *string
)
1522 union type_stack_elt element
;
1525 /* If there is anything on the stack (we know it will be a
1526 tp_pointer), insert the address space qualifier above it.
1527 Otherwise, simply push this on the top of the stack. */
1528 if (type_stack
.depth
)
1533 element
.piece
= tp_space_identifier
;
1534 insert_into_type_stack (slot
, element
);
1535 element
.int_val
= address_space_name_to_int (parse_gdbarch
, string
);
1536 insert_into_type_stack (slot
, element
);
1542 if (type_stack
.depth
)
1543 return type_stack
.elements
[--type_stack
.depth
].piece
;
1550 if (type_stack
.depth
)
1551 return type_stack
.elements
[--type_stack
.depth
].int_val
;
1552 /* "Can't happen". */
1556 /* Pop a type list element from the global type stack. */
1558 static VEC (type_ptr
) *
1561 gdb_assert (type_stack
.depth
);
1562 return type_stack
.elements
[--type_stack
.depth
].typelist_val
;
1565 /* Pop a type_stack element from the global type stack. */
1567 static struct type_stack
*
1568 pop_type_stack (void)
1570 gdb_assert (type_stack
.depth
);
1571 return type_stack
.elements
[--type_stack
.depth
].stack_val
;
1574 /* Append the elements of the type stack FROM to the type stack TO.
1575 Always returns TO. */
1578 append_type_stack (struct type_stack
*to
, struct type_stack
*from
)
1580 type_stack_reserve (to
, from
->depth
);
1582 memcpy (&to
->elements
[to
->depth
], &from
->elements
[0],
1583 from
->depth
* sizeof (union type_stack_elt
));
1584 to
->depth
+= from
->depth
;
1589 /* Push the type stack STACK as an element on the global type stack. */
1592 push_type_stack (struct type_stack
*stack
)
1594 check_type_stack_depth ();
1595 type_stack
.elements
[type_stack
.depth
++].stack_val
= stack
;
1596 push_type (tp_type_stack
);
1599 /* Copy the global type stack into a newly allocated type stack and
1600 return it. The global stack is cleared. The returned type stack
1601 must be freed with type_stack_cleanup. */
1604 get_type_stack (void)
1606 struct type_stack
*result
= XNEW (struct type_stack
);
1608 *result
= type_stack
;
1609 type_stack
.depth
= 0;
1610 type_stack
.size
= 0;
1611 type_stack
.elements
= NULL
;
1616 /* A cleanup function that destroys a single type stack. */
1619 type_stack_cleanup (void *arg
)
1621 struct type_stack
*stack
= arg
;
1623 xfree (stack
->elements
);
1627 /* Push a function type with arguments onto the global type stack.
1628 LIST holds the argument types. If the final item in LIST is NULL,
1629 then the function will be varargs. */
1632 push_typelist (VEC (type_ptr
) *list
)
1634 check_type_stack_depth ();
1635 type_stack
.elements
[type_stack
.depth
++].typelist_val
= list
;
1636 push_type (tp_function_with_arguments
);
1639 /* Pop the type stack and return the type which corresponds to FOLLOW_TYPE
1640 as modified by all the stuff on the stack. */
1642 follow_types (struct type
*follow_type
)
1646 int make_volatile
= 0;
1647 int make_addr_space
= 0;
1651 switch (pop_type ())
1656 follow_type
= make_cv_type (make_const
,
1657 TYPE_VOLATILE (follow_type
),
1660 follow_type
= make_cv_type (TYPE_CONST (follow_type
),
1663 if (make_addr_space
)
1664 follow_type
= make_type_with_address_space (follow_type
,
1666 make_const
= make_volatile
= 0;
1667 make_addr_space
= 0;
1675 case tp_space_identifier
:
1676 make_addr_space
= pop_type_int ();
1679 follow_type
= lookup_pointer_type (follow_type
);
1681 follow_type
= make_cv_type (make_const
,
1682 TYPE_VOLATILE (follow_type
),
1685 follow_type
= make_cv_type (TYPE_CONST (follow_type
),
1688 if (make_addr_space
)
1689 follow_type
= make_type_with_address_space (follow_type
,
1691 make_const
= make_volatile
= 0;
1692 make_addr_space
= 0;
1695 follow_type
= lookup_reference_type (follow_type
);
1697 follow_type
= make_cv_type (make_const
,
1698 TYPE_VOLATILE (follow_type
),
1701 follow_type
= make_cv_type (TYPE_CONST (follow_type
),
1704 if (make_addr_space
)
1705 follow_type
= make_type_with_address_space (follow_type
,
1707 make_const
= make_volatile
= 0;
1708 make_addr_space
= 0;
1711 array_size
= pop_type_int ();
1712 /* FIXME-type-allocation: need a way to free this type when we are
1715 lookup_array_range_type (follow_type
,
1716 0, array_size
>= 0 ? array_size
- 1 : 0);
1718 TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (follow_type
) = 1;
1721 /* FIXME-type-allocation: need a way to free this type when we are
1723 follow_type
= lookup_function_type (follow_type
);
1726 case tp_function_with_arguments
:
1728 VEC (type_ptr
) *args
= pop_typelist ();
1731 = lookup_function_type_with_arguments (follow_type
,
1732 VEC_length (type_ptr
, args
),
1733 VEC_address (type_ptr
,
1735 VEC_free (type_ptr
, args
);
1741 struct type_stack
*stack
= pop_type_stack ();
1742 /* Sort of ugly, but not really much worse than the
1744 struct type_stack save
= type_stack
;
1746 type_stack
= *stack
;
1747 follow_type
= follow_types (follow_type
);
1748 gdb_assert (type_stack
.depth
== 0);
1754 gdb_assert_not_reached ("unrecognized tp_ value in follow_types");
1759 /* This function avoids direct calls to fprintf
1760 in the parser generated debug code. */
1762 parser_fprintf (FILE *x
, const char *y
, ...)
1768 vfprintf_unfiltered (gdb_stderr
, y
, args
);
1771 fprintf_unfiltered (gdb_stderr
, " Unknown FILE used.\n");
1772 vfprintf_unfiltered (gdb_stderr
, y
, args
);
1777 /* Implementation of the exp_descriptor method operator_check. */
1780 operator_check_standard (struct expression
*exp
, int pos
,
1781 int (*objfile_func
) (struct objfile
*objfile
,
1785 const union exp_element
*const elts
= exp
->elts
;
1786 struct type
*type
= NULL
;
1787 struct objfile
*objfile
= NULL
;
1789 /* Extended operators should have been already handled by exp_descriptor
1790 iterate method of its specific language. */
1791 gdb_assert (elts
[pos
].opcode
< OP_EXTENDED0
);
1793 /* Track the callers of write_exp_elt_type for this table. */
1795 switch (elts
[pos
].opcode
)
1808 type
= elts
[pos
+ 1].type
;
1813 LONGEST arg
, nargs
= elts
[pos
+ 1].longconst
;
1815 for (arg
= 0; arg
< nargs
; arg
++)
1817 struct type
*type
= elts
[pos
+ 2 + arg
].type
;
1818 struct objfile
*objfile
= TYPE_OBJFILE (type
);
1820 if (objfile
&& (*objfile_func
) (objfile
, data
))
1826 case UNOP_MEMVAL_TLS
:
1827 objfile
= elts
[pos
+ 1].objfile
;
1828 type
= elts
[pos
+ 2].type
;
1833 const struct block
*const block
= elts
[pos
+ 1].block
;
1834 const struct symbol
*const symbol
= elts
[pos
+ 2].symbol
;
1836 /* Check objfile where the variable itself is placed.
1837 SYMBOL_OBJ_SECTION (symbol) may be NULL. */
1838 if ((*objfile_func
) (SYMBOL_SYMTAB (symbol
)->objfile
, data
))
1841 /* Check objfile where is placed the code touching the variable. */
1842 objfile
= lookup_objfile_from_block (block
);
1844 type
= SYMBOL_TYPE (symbol
);
1849 /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
1851 if (type
&& TYPE_OBJFILE (type
)
1852 && (*objfile_func
) (TYPE_OBJFILE (type
), data
))
1854 if (objfile
&& (*objfile_func
) (objfile
, data
))
1860 /* Call OBJFILE_FUNC for any TYPE and OBJFILE found being referenced by EXP.
1861 The functions are never called with NULL OBJFILE. Functions get passed an
1862 arbitrary caller supplied DATA pointer. If any of the functions returns
1863 non-zero value then (any other) non-zero value is immediately returned to
1864 the caller. Otherwise zero is returned after iterating through whole EXP.
1868 exp_iterate (struct expression
*exp
,
1869 int (*objfile_func
) (struct objfile
*objfile
, void *data
),
1874 for (endpos
= exp
->nelts
; endpos
> 0; )
1876 int pos
, args
, oplen
= 0;
1878 operator_length (exp
, endpos
, &oplen
, &args
);
1879 gdb_assert (oplen
> 0);
1881 pos
= endpos
- oplen
;
1882 if (exp
->language_defn
->la_exp_desc
->operator_check (exp
, pos
,
1883 objfile_func
, data
))
1892 /* Helper for exp_uses_objfile. */
1895 exp_uses_objfile_iter (struct objfile
*exp_objfile
, void *objfile_voidp
)
1897 struct objfile
*objfile
= objfile_voidp
;
1899 if (exp_objfile
->separate_debug_objfile_backlink
)
1900 exp_objfile
= exp_objfile
->separate_debug_objfile_backlink
;
1902 return exp_objfile
== objfile
;
1905 /* Return 1 if EXP uses OBJFILE (and will become dangling when OBJFILE
1906 is unloaded), otherwise return 0. OBJFILE must not be a separate debug info
1910 exp_uses_objfile (struct expression
*exp
, struct objfile
*objfile
)
1912 gdb_assert (objfile
->separate_debug_objfile_backlink
== NULL
);
1914 return exp_iterate (exp
, exp_uses_objfile_iter
, objfile
);
1918 _initialize_parse (void)
1920 type_stack
.size
= 0;
1921 type_stack
.depth
= 0;
1922 type_stack
.elements
= NULL
;
1924 add_setshow_zuinteger_cmd ("expression", class_maintenance
,
1926 _("Set expression debugging."),
1927 _("Show expression debugging."),
1928 _("When non-zero, the internal representation "
1929 "of expressions will be printed."),
1931 show_expressiondebug
,
1932 &setdebuglist
, &showdebuglist
);
1933 add_setshow_boolean_cmd ("parser", class_maintenance
,
1935 _("Set parser debugging."),
1936 _("Show parser debugging."),
1937 _("When non-zero, expression parser "
1938 "tracing will be enabled."),
1941 &setdebuglist
, &showdebuglist
);