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 bound_minimal_symbol bound_msym
)
501 struct minimal_symbol
*msymbol
= bound_msym
.minsym
;
502 struct objfile
*objfile
= bound_msym
.objfile
;
503 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
505 CORE_ADDR addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
506 struct obj_section
*section
= SYMBOL_OBJ_SECTION (objfile
, msymbol
);
507 enum minimal_symbol_type type
= MSYMBOL_TYPE (msymbol
);
510 /* The minimal symbol might point to a function descriptor;
511 resolve it to the actual code address instead. */
512 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
, addr
, ¤t_target
);
515 struct bound_minimal_symbol ifunc_msym
= lookup_minimal_symbol_by_pc (pc
);
517 /* In this case, assume we have a code symbol instead of
520 if (ifunc_msym
.minsym
!= NULL
521 && MSYMBOL_TYPE (ifunc_msym
.minsym
) == mst_text_gnu_ifunc
522 && SYMBOL_VALUE_ADDRESS (ifunc_msym
.minsym
) == pc
)
524 /* A function descriptor has been resolved but PC is still in the
525 STT_GNU_IFUNC resolver body (such as because inferior does not
526 run to be able to call it). */
528 type
= mst_text_gnu_ifunc
;
536 if (overlay_debugging
)
537 addr
= symbol_overlayed_address (addr
, section
);
539 write_exp_elt_opcode (OP_LONG
);
540 /* Let's make the type big enough to hold a 64-bit address. */
541 write_exp_elt_type (objfile_type (objfile
)->builtin_core_addr
);
542 write_exp_elt_longcst ((LONGEST
) addr
);
543 write_exp_elt_opcode (OP_LONG
);
545 if (section
&& section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
)
547 write_exp_elt_opcode (UNOP_MEMVAL_TLS
);
548 write_exp_elt_objfile (objfile
);
549 write_exp_elt_type (objfile_type (objfile
)->nodebug_tls_symbol
);
550 write_exp_elt_opcode (UNOP_MEMVAL_TLS
);
554 write_exp_elt_opcode (UNOP_MEMVAL
);
559 case mst_solib_trampoline
:
560 write_exp_elt_type (objfile_type (objfile
)->nodebug_text_symbol
);
563 case mst_text_gnu_ifunc
:
564 write_exp_elt_type (objfile_type (objfile
)
565 ->nodebug_text_gnu_ifunc_symbol
);
572 write_exp_elt_type (objfile_type (objfile
)->nodebug_data_symbol
);
575 case mst_slot_got_plt
:
576 write_exp_elt_type (objfile_type (objfile
)->nodebug_got_plt_symbol
);
580 write_exp_elt_type (objfile_type (objfile
)->nodebug_unknown_symbol
);
583 write_exp_elt_opcode (UNOP_MEMVAL
);
586 /* Mark the current index as the starting location of a structure
587 expression. This is used when completing on field names. */
590 mark_struct_expression (void)
592 gdb_assert (parse_completion
593 && expout_tag_completion_type
== TYPE_CODE_UNDEF
);
594 expout_last_struct
= expout_ptr
;
597 /* Indicate that the current parser invocation is completing a tag.
598 TAG is the type code of the tag, and PTR and LENGTH represent the
599 start of the tag name. */
602 mark_completion_tag (enum type_code tag
, const char *ptr
, int length
)
604 gdb_assert (parse_completion
605 && expout_tag_completion_type
== TYPE_CODE_UNDEF
606 && expout_completion_name
== NULL
607 && expout_last_struct
== -1);
608 gdb_assert (tag
== TYPE_CODE_UNION
609 || tag
== TYPE_CODE_STRUCT
610 || tag
== TYPE_CODE_CLASS
611 || tag
== TYPE_CODE_ENUM
);
612 expout_tag_completion_type
= tag
;
613 expout_completion_name
= xmalloc (length
+ 1);
614 memcpy (expout_completion_name
, ptr
, length
);
615 expout_completion_name
[length
] = '\0';
619 /* Recognize tokens that start with '$'. These include:
621 $regname A native register name or a "standard
624 $variable A convenience variable with a name chosen
627 $digits Value history with index <digits>, starting
628 from the first value which has index 1.
630 $$digits Value history with index <digits> relative
631 to the last value. I.e. $$0 is the last
632 value, $$1 is the one previous to that, $$2
633 is the one previous to $$1, etc.
635 $ | $0 | $$0 The last value in the value history.
637 $$ An abbreviation for the second to the last
638 value in the value history, I.e. $$1 */
641 write_dollar_variable (struct stoken str
)
643 struct symbol
*sym
= NULL
;
644 struct bound_minimal_symbol msym
;
645 struct internalvar
*isym
= NULL
;
647 /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
648 and $$digits (equivalent to $<-digits> if you could type that). */
652 /* Double dollar means negate the number and add -1 as well.
653 Thus $$ alone means -1. */
654 if (str
.length
>= 2 && str
.ptr
[1] == '$')
661 /* Just dollars (one or two). */
665 /* Is the rest of the token digits? */
666 for (; i
< str
.length
; i
++)
667 if (!(str
.ptr
[i
] >= '0' && str
.ptr
[i
] <= '9'))
671 i
= atoi (str
.ptr
+ 1 + negate
);
677 /* Handle tokens that refer to machine registers:
678 $ followed by a register name. */
679 i
= user_reg_map_name_to_regnum (parse_gdbarch
,
680 str
.ptr
+ 1, str
.length
- 1);
682 goto handle_register
;
684 /* Any names starting with $ are probably debugger internal variables. */
686 isym
= lookup_only_internalvar (copy_name (str
) + 1);
689 write_exp_elt_opcode (OP_INTERNALVAR
);
690 write_exp_elt_intern (isym
);
691 write_exp_elt_opcode (OP_INTERNALVAR
);
695 /* On some systems, such as HP-UX and hppa-linux, certain system routines
696 have names beginning with $ or $$. Check for those, first. */
698 sym
= lookup_symbol (copy_name (str
), (struct block
*) NULL
,
702 write_exp_elt_opcode (OP_VAR_VALUE
);
703 write_exp_elt_block (block_found
); /* set by lookup_symbol */
704 write_exp_elt_sym (sym
);
705 write_exp_elt_opcode (OP_VAR_VALUE
);
708 msym
= lookup_bound_minimal_symbol (copy_name (str
));
711 write_exp_msymbol (msym
);
715 /* Any other names are assumed to be debugger internal variables. */
717 write_exp_elt_opcode (OP_INTERNALVAR
);
718 write_exp_elt_intern (create_internalvar (copy_name (str
) + 1));
719 write_exp_elt_opcode (OP_INTERNALVAR
);
722 write_exp_elt_opcode (OP_LAST
);
723 write_exp_elt_longcst ((LONGEST
) i
);
724 write_exp_elt_opcode (OP_LAST
);
727 write_exp_elt_opcode (OP_REGISTER
);
730 write_exp_string (str
);
731 write_exp_elt_opcode (OP_REGISTER
);
737 find_template_name_end (char *p
)
740 int just_seen_right
= 0;
741 int just_seen_colon
= 0;
742 int just_seen_space
= 0;
744 if (!p
|| (*p
!= '<'))
755 /* In future, may want to allow these?? */
758 depth
++; /* start nested template */
759 if (just_seen_colon
|| just_seen_right
|| just_seen_space
)
760 return 0; /* but not after : or :: or > or space */
763 if (just_seen_colon
|| just_seen_right
)
764 return 0; /* end a (nested?) template */
765 just_seen_right
= 1; /* but not after : or :: */
766 if (--depth
== 0) /* also disallow >>, insist on > > */
767 return ++p
; /* if outermost ended, return */
770 if (just_seen_space
|| (just_seen_colon
> 1))
771 return 0; /* nested class spec coming up */
772 just_seen_colon
++; /* we allow :: but not :::: */
777 if (!((*p
>= 'a' && *p
<= 'z') || /* allow token chars */
778 (*p
>= 'A' && *p
<= 'Z') ||
779 (*p
>= '0' && *p
<= '9') ||
780 (*p
== '_') || (*p
== ',') || /* commas for template args */
781 (*p
== '&') || (*p
== '*') || /* pointer and ref types */
782 (*p
== '(') || (*p
== ')') || /* function types */
783 (*p
== '[') || (*p
== ']'))) /* array types */
797 /* Return a null-terminated temporary copy of the name of a string token.
799 Tokens that refer to names do so with explicit pointer and length,
800 so they can share the storage that lexptr is parsing.
801 When it is necessary to pass a name to a function that expects
802 a null-terminated string, the substring is copied out
803 into a separate block of storage.
805 N.B. A single buffer is reused on each call. */
808 copy_name (struct stoken token
)
810 /* A temporary buffer for identifiers, so we can null-terminate them.
811 We allocate this with xrealloc. parse_exp_1 used to allocate with
812 alloca, using the size of the whole expression as a conservative
813 estimate of the space needed. However, macro expansion can
814 introduce names longer than the original expression; there's no
815 practical way to know beforehand how large that might be. */
816 static char *namecopy
;
817 static size_t namecopy_size
;
819 /* Make sure there's enough space for the token. */
820 if (namecopy_size
< token
.length
+ 1)
822 namecopy_size
= token
.length
+ 1;
823 namecopy
= xrealloc (namecopy
, token
.length
+ 1);
826 memcpy (namecopy
, token
.ptr
, token
.length
);
827 namecopy
[token
.length
] = 0;
833 /* See comments on parser-defs.h. */
836 prefixify_expression (struct expression
*expr
)
838 int len
= sizeof (struct expression
) + EXP_ELEM_TO_BYTES (expr
->nelts
);
839 struct expression
*temp
;
840 int inpos
= expr
->nelts
, outpos
= 0;
842 temp
= (struct expression
*) alloca (len
);
844 /* Copy the original expression into temp. */
845 memcpy (temp
, expr
, len
);
847 return prefixify_subexp (temp
, expr
, inpos
, outpos
);
850 /* Return the number of exp_elements in the postfix subexpression
851 of EXPR whose operator is at index ENDPOS - 1 in EXPR. */
854 length_of_subexp (struct expression
*expr
, int endpos
)
858 operator_length (expr
, endpos
, &oplen
, &args
);
862 oplen
+= length_of_subexp (expr
, endpos
- oplen
);
869 /* Sets *OPLENP to the length of the operator whose (last) index is
870 ENDPOS - 1 in EXPR, and sets *ARGSP to the number of arguments that
874 operator_length (const struct expression
*expr
, int endpos
, int *oplenp
,
877 expr
->language_defn
->la_exp_desc
->operator_length (expr
, endpos
,
881 /* Default value for operator_length in exp_descriptor vectors. */
884 operator_length_standard (const struct expression
*expr
, int endpos
,
885 int *oplenp
, int *argsp
)
889 enum f90_range_type range_type
;
893 error (_("?error in operator_length_standard"));
895 i
= (int) expr
->elts
[endpos
- 1].opcode
;
901 oplen
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
902 oplen
= 5 + BYTES_TO_EXP_ELEM (oplen
+ 1);
916 case OP_VAR_ENTRY_VALUE
:
926 case OP_F77_UNDETERMINED_ARGLIST
:
928 args
= 1 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
932 oplen
= 4 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
936 case OP_OBJC_MSGCALL
: /* Objective C message (method) call. */
938 args
= 1 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
947 case UNOP_DYNAMIC_CAST
:
948 case UNOP_REINTERPRET_CAST
:
949 case UNOP_MEMVAL_TYPE
:
961 case UNOP_MEMVAL_TLS
:
982 oplen
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
983 oplen
= 4 + BYTES_TO_EXP_ELEM (oplen
+ 1);
988 case STRUCTOP_STRUCT
:
995 case OP_OBJC_NSSTRING
: /* Objective C Foundation Class
996 NSString constant. */
997 case OP_OBJC_SELECTOR
: /* Objective C "@selector" pseudo-op. */
999 oplen
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1000 oplen
= 4 + BYTES_TO_EXP_ELEM (oplen
+ 1);
1005 args
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1006 args
-= longest_to_int (expr
->elts
[endpos
- 3].longconst
);
1016 case MULTI_SUBSCRIPT
:
1018 args
= 1 + longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1021 case BINOP_ASSIGN_MODIFY
:
1034 range_type
= longest_to_int (expr
->elts
[endpos
- 2].longconst
);
1037 case LOW_BOUND_DEFAULT
:
1038 case HIGH_BOUND_DEFAULT
:
1041 case BOTH_BOUND_DEFAULT
:
1044 case NONE_BOUND_DEFAULT
:
1052 args
= 1 + (i
< (int) BINOP_END
);
1059 /* Copy the subexpression ending just before index INEND in INEXPR
1060 into OUTEXPR, starting at index OUTBEG.
1061 In the process, convert it from suffix to prefix form.
1062 If EXPOUT_LAST_STRUCT is -1, then this function always returns -1.
1063 Otherwise, it returns the index of the subexpression which is the
1064 left-hand-side of the expression at EXPOUT_LAST_STRUCT. */
1067 prefixify_subexp (struct expression
*inexpr
,
1068 struct expression
*outexpr
, int inend
, int outbeg
)
1076 operator_length (inexpr
, inend
, &oplen
, &args
);
1078 /* Copy the final operator itself, from the end of the input
1079 to the beginning of the output. */
1081 memcpy (&outexpr
->elts
[outbeg
], &inexpr
->elts
[inend
],
1082 EXP_ELEM_TO_BYTES (oplen
));
1085 if (expout_last_struct
== inend
)
1086 result
= outbeg
- oplen
;
1088 /* Find the lengths of the arg subexpressions. */
1089 arglens
= (int *) alloca (args
* sizeof (int));
1090 for (i
= args
- 1; i
>= 0; i
--)
1092 oplen
= length_of_subexp (inexpr
, inend
);
1097 /* Now copy each subexpression, preserving the order of
1098 the subexpressions, but prefixifying each one.
1099 In this loop, inend starts at the beginning of
1100 the expression this level is working on
1101 and marches forward over the arguments.
1102 outbeg does similarly in the output. */
1103 for (i
= 0; i
< args
; i
++)
1109 r
= prefixify_subexp (inexpr
, outexpr
, inend
, outbeg
);
1112 /* Return immediately. We probably have only parsed a
1113 partial expression, so we don't want to try to reverse
1114 the other operands. */
1123 /* Read an expression from the string *STRINGPTR points to,
1124 parse it, and return a pointer to a struct expression that we malloc.
1125 Use block BLOCK as the lexical context for variable names;
1126 if BLOCK is zero, use the block of the selected stack frame.
1127 Meanwhile, advance *STRINGPTR to point after the expression,
1128 at the first nonwhite character that is not part of the expression
1129 (possibly a null character).
1131 If COMMA is nonzero, stop if a comma is reached. */
1134 parse_exp_1 (const char **stringptr
, CORE_ADDR pc
, const struct block
*block
,
1137 return parse_exp_in_context (stringptr
, pc
, block
, comma
, 0, NULL
);
1140 static struct expression
*
1141 parse_exp_in_context (const char **stringptr
, CORE_ADDR pc
,
1142 const struct block
*block
,
1143 int comma
, int void_context_p
, int *out_subexp
)
1145 struct expression
*expr
;
1146 char *const_hack
= *stringptr
? xstrdup (*stringptr
) : NULL
;
1147 char *orig
= const_hack
;
1148 struct cleanup
*back_to
= make_cleanup (xfree
, const_hack
);
1150 expr
= parse_exp_in_context_1 (&const_hack
, pc
, block
, comma
,
1151 void_context_p
, out_subexp
);
1152 (*stringptr
) += const_hack
- orig
;
1153 do_cleanups (back_to
);
1157 /* As for parse_exp_1, except that if VOID_CONTEXT_P, then
1158 no value is expected from the expression.
1159 OUT_SUBEXP is set when attempting to complete a field name; in this
1160 case it is set to the index of the subexpression on the
1161 left-hand-side of the struct op. If not doing such completion, it
1162 is left untouched. */
1164 static struct expression
*
1165 parse_exp_in_context_1 (char **stringptr
, CORE_ADDR pc
,
1166 const struct block
*block
,
1167 int comma
, int void_context_p
, int *out_subexp
)
1169 volatile struct gdb_exception except
;
1170 struct cleanup
*old_chain
, *inner_chain
;
1171 const struct language_defn
*lang
= NULL
;
1174 lexptr
= *stringptr
;
1178 type_stack
.depth
= 0;
1179 expout_last_struct
= -1;
1180 expout_tag_completion_type
= TYPE_CODE_UNDEF
;
1181 xfree (expout_completion_name
);
1182 expout_completion_name
= NULL
;
1184 comma_terminates
= comma
;
1186 if (lexptr
== 0 || *lexptr
== 0)
1187 error_no_arg (_("expression to compute"));
1189 old_chain
= make_cleanup (free_funcalls
, 0 /*ignore*/);
1192 expression_context_block
= block
;
1194 /* If no context specified, try using the current frame, if any. */
1195 if (!expression_context_block
)
1196 expression_context_block
= get_selected_block (&expression_context_pc
);
1198 expression_context_pc
= BLOCK_START (expression_context_block
);
1200 expression_context_pc
= pc
;
1202 /* Fall back to using the current source static context, if any. */
1204 if (!expression_context_block
)
1206 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
1208 expression_context_block
1209 = BLOCKVECTOR_BLOCK (BLOCKVECTOR (cursal
.symtab
), STATIC_BLOCK
);
1210 if (expression_context_block
)
1211 expression_context_pc
= BLOCK_START (expression_context_block
);
1214 if (language_mode
== language_mode_auto
&& block
!= NULL
)
1216 /* Find the language associated to the given context block.
1217 Default to the current language if it can not be determined.
1219 Note that using the language corresponding to the current frame
1220 can sometimes give unexpected results. For instance, this
1221 routine is often called several times during the inferior
1222 startup phase to re-parse breakpoint expressions after
1223 a new shared library has been loaded. The language associated
1224 to the current frame at this moment is not relevant for
1225 the breakpoint. Using it would therefore be silly, so it seems
1226 better to rely on the current language rather than relying on
1227 the current frame language to parse the expression. That's why
1228 we do the following language detection only if the context block
1229 has been specifically provided. */
1230 struct symbol
*func
= block_linkage_function (block
);
1233 lang
= language_def (SYMBOL_LANGUAGE (func
));
1234 if (lang
== NULL
|| lang
->la_language
== language_unknown
)
1235 lang
= current_language
;
1238 lang
= current_language
;
1240 /* get_current_arch may reset CURRENT_LANGUAGE via select_frame.
1241 While we need CURRENT_LANGUAGE to be set to LANG (for lookup_symbol
1242 and others called from *.y) ensure CURRENT_LANGUAGE gets restored
1243 to the value matching SELECTED_FRAME as set by get_current_arch. */
1244 initialize_expout (10, lang
, get_current_arch ());
1245 inner_chain
= make_cleanup_restore_current_language ();
1246 set_language (lang
->la_language
);
1248 TRY_CATCH (except
, RETURN_MASK_ALL
)
1250 if (lang
->la_parser ())
1251 lang
->la_error (NULL
);
1253 if (except
.reason
< 0)
1255 if (! parse_completion
)
1258 throw_exception (except
);
1262 reallocate_expout ();
1264 /* Convert expression from postfix form as generated by yacc
1265 parser, to a prefix form. */
1267 if (expressiondebug
)
1268 dump_raw_expression (expout
, gdb_stdlog
,
1269 "before conversion to prefix form");
1271 subexp
= prefixify_expression (expout
);
1273 *out_subexp
= subexp
;
1275 lang
->la_post_parser (&expout
, void_context_p
);
1277 if (expressiondebug
)
1278 dump_prefix_expression (expout
, gdb_stdlog
);
1280 do_cleanups (inner_chain
);
1281 discard_cleanups (old_chain
);
1283 *stringptr
= lexptr
;
1287 /* Parse STRING as an expression, and complain if this fails
1288 to use up all of the contents of STRING. */
1291 parse_expression (const char *string
)
1293 struct expression
*exp
;
1295 exp
= parse_exp_1 (&string
, 0, 0, 0);
1297 error (_("Junk after end of expression."));
1301 /* Parse STRING as an expression. If parsing ends in the middle of a
1302 field reference, return the type of the left-hand-side of the
1303 reference; furthermore, if the parsing ends in the field name,
1304 return the field name in *NAME. If the parsing ends in the middle
1305 of a field reference, but the reference is somehow invalid, throw
1306 an exception. In all other cases, return NULL. Returned non-NULL
1307 *NAME must be freed by the caller. */
1310 parse_expression_for_completion (const char *string
, char **name
,
1311 enum type_code
*code
)
1313 struct expression
*exp
= NULL
;
1316 volatile struct gdb_exception except
;
1318 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1320 parse_completion
= 1;
1321 exp
= parse_exp_in_context (&string
, 0, 0, 0, 0, &subexp
);
1323 parse_completion
= 0;
1324 if (except
.reason
< 0 || ! exp
)
1327 if (expout_tag_completion_type
!= TYPE_CODE_UNDEF
)
1329 *code
= expout_tag_completion_type
;
1330 *name
= expout_completion_name
;
1331 expout_completion_name
= NULL
;
1335 if (expout_last_struct
== -1)
1341 *name
= extract_field_op (exp
, &subexp
);
1348 /* This might throw an exception. If so, we want to let it
1350 val
= evaluate_subexpression_type (exp
, subexp
);
1351 /* (*NAME) is a part of the EXP memory block freed below. */
1352 *name
= xstrdup (*name
);
1355 return value_type (val
);
1358 /* A post-parser that does nothing. */
1361 null_post_parser (struct expression
**exp
, int void_context_p
)
1365 /* Parse floating point value P of length LEN.
1366 Return 0 (false) if invalid, 1 (true) if valid.
1367 The successfully parsed number is stored in D.
1368 *SUFFIX points to the suffix of the number in P.
1370 NOTE: This accepts the floating point syntax that sscanf accepts. */
1373 parse_float (const char *p
, int len
, DOUBLEST
*d
, const char **suffix
)
1378 copy
= xmalloc (len
+ 1);
1379 memcpy (copy
, p
, len
);
1382 num
= sscanf (copy
, "%" DOUBLEST_SCAN_FORMAT
"%n", d
, &n
);
1385 /* The sscanf man page suggests not making any assumptions on the effect
1386 of %n on the result, so we don't.
1387 That is why we simply test num == 0. */
1395 /* Parse floating point value P of length LEN, using the C syntax for floats.
1396 Return 0 (false) if invalid, 1 (true) if valid.
1397 The successfully parsed number is stored in *D.
1398 Its type is taken from builtin_type (gdbarch) and is stored in *T. */
1401 parse_c_float (struct gdbarch
*gdbarch
, const char *p
, int len
,
1402 DOUBLEST
*d
, struct type
**t
)
1406 const struct builtin_type
*builtin_types
= builtin_type (gdbarch
);
1408 if (! parse_float (p
, len
, d
, &suffix
))
1411 suffix_len
= p
+ len
- suffix
;
1413 if (suffix_len
== 0)
1414 *t
= builtin_types
->builtin_double
;
1415 else if (suffix_len
== 1)
1417 /* Handle suffixes: 'f' for float, 'l' for long double. */
1418 if (tolower (*suffix
) == 'f')
1419 *t
= builtin_types
->builtin_float
;
1420 else if (tolower (*suffix
) == 'l')
1421 *t
= builtin_types
->builtin_long_double
;
1431 /* Stuff for maintaining a stack of types. Currently just used by C, but
1432 probably useful for any language which declares its types "backwards". */
1434 /* Ensure that there are HOWMUCH open slots on the type stack STACK. */
1437 type_stack_reserve (struct type_stack
*stack
, int howmuch
)
1439 if (stack
->depth
+ howmuch
>= stack
->size
)
1442 if (stack
->size
< howmuch
)
1443 stack
->size
= howmuch
;
1444 stack
->elements
= xrealloc (stack
->elements
,
1445 stack
->size
* sizeof (union type_stack_elt
));
1449 /* Ensure that there is a single open slot in the global type stack. */
1452 check_type_stack_depth (void)
1454 type_stack_reserve (&type_stack
, 1);
1457 /* A helper function for insert_type and insert_type_address_space.
1458 This does work of expanding the type stack and inserting the new
1459 element, ELEMENT, into the stack at location SLOT. */
1462 insert_into_type_stack (int slot
, union type_stack_elt element
)
1464 check_type_stack_depth ();
1466 if (slot
< type_stack
.depth
)
1467 memmove (&type_stack
.elements
[slot
+ 1], &type_stack
.elements
[slot
],
1468 (type_stack
.depth
- slot
) * sizeof (union type_stack_elt
));
1469 type_stack
.elements
[slot
] = element
;
1473 /* Insert a new type, TP, at the bottom of the type stack. If TP is
1474 tp_pointer or tp_reference, it is inserted at the bottom. If TP is
1475 a qualifier, it is inserted at slot 1 (just above a previous
1476 tp_pointer) if there is anything on the stack, or simply pushed if
1477 the stack is empty. Other values for TP are invalid. */
1480 insert_type (enum type_pieces tp
)
1482 union type_stack_elt element
;
1485 gdb_assert (tp
== tp_pointer
|| tp
== tp_reference
1486 || tp
== tp_const
|| tp
== tp_volatile
);
1488 /* If there is anything on the stack (we know it will be a
1489 tp_pointer), insert the qualifier above it. Otherwise, simply
1490 push this on the top of the stack. */
1491 if (type_stack
.depth
&& (tp
== tp_const
|| tp
== tp_volatile
))
1497 insert_into_type_stack (slot
, element
);
1501 push_type (enum type_pieces tp
)
1503 check_type_stack_depth ();
1504 type_stack
.elements
[type_stack
.depth
++].piece
= tp
;
1508 push_type_int (int n
)
1510 check_type_stack_depth ();
1511 type_stack
.elements
[type_stack
.depth
++].int_val
= n
;
1514 /* Insert a tp_space_identifier and the corresponding address space
1515 value into the stack. STRING is the name of an address space, as
1516 recognized by address_space_name_to_int. If the stack is empty,
1517 the new elements are simply pushed. If the stack is not empty,
1518 this function assumes that the first item on the stack is a
1519 tp_pointer, and the new values are inserted above the first
1523 insert_type_address_space (char *string
)
1525 union type_stack_elt element
;
1528 /* If there is anything on the stack (we know it will be a
1529 tp_pointer), insert the address space qualifier above it.
1530 Otherwise, simply push this on the top of the stack. */
1531 if (type_stack
.depth
)
1536 element
.piece
= tp_space_identifier
;
1537 insert_into_type_stack (slot
, element
);
1538 element
.int_val
= address_space_name_to_int (parse_gdbarch
, string
);
1539 insert_into_type_stack (slot
, element
);
1545 if (type_stack
.depth
)
1546 return type_stack
.elements
[--type_stack
.depth
].piece
;
1553 if (type_stack
.depth
)
1554 return type_stack
.elements
[--type_stack
.depth
].int_val
;
1555 /* "Can't happen". */
1559 /* Pop a type list element from the global type stack. */
1561 static VEC (type_ptr
) *
1564 gdb_assert (type_stack
.depth
);
1565 return type_stack
.elements
[--type_stack
.depth
].typelist_val
;
1568 /* Pop a type_stack element from the global type stack. */
1570 static struct type_stack
*
1571 pop_type_stack (void)
1573 gdb_assert (type_stack
.depth
);
1574 return type_stack
.elements
[--type_stack
.depth
].stack_val
;
1577 /* Append the elements of the type stack FROM to the type stack TO.
1578 Always returns TO. */
1581 append_type_stack (struct type_stack
*to
, struct type_stack
*from
)
1583 type_stack_reserve (to
, from
->depth
);
1585 memcpy (&to
->elements
[to
->depth
], &from
->elements
[0],
1586 from
->depth
* sizeof (union type_stack_elt
));
1587 to
->depth
+= from
->depth
;
1592 /* Push the type stack STACK as an element on the global type stack. */
1595 push_type_stack (struct type_stack
*stack
)
1597 check_type_stack_depth ();
1598 type_stack
.elements
[type_stack
.depth
++].stack_val
= stack
;
1599 push_type (tp_type_stack
);
1602 /* Copy the global type stack into a newly allocated type stack and
1603 return it. The global stack is cleared. The returned type stack
1604 must be freed with type_stack_cleanup. */
1607 get_type_stack (void)
1609 struct type_stack
*result
= XNEW (struct type_stack
);
1611 *result
= type_stack
;
1612 type_stack
.depth
= 0;
1613 type_stack
.size
= 0;
1614 type_stack
.elements
= NULL
;
1619 /* A cleanup function that destroys a single type stack. */
1622 type_stack_cleanup (void *arg
)
1624 struct type_stack
*stack
= arg
;
1626 xfree (stack
->elements
);
1630 /* Push a function type with arguments onto the global type stack.
1631 LIST holds the argument types. If the final item in LIST is NULL,
1632 then the function will be varargs. */
1635 push_typelist (VEC (type_ptr
) *list
)
1637 check_type_stack_depth ();
1638 type_stack
.elements
[type_stack
.depth
++].typelist_val
= list
;
1639 push_type (tp_function_with_arguments
);
1642 /* Pop the type stack and return the type which corresponds to FOLLOW_TYPE
1643 as modified by all the stuff on the stack. */
1645 follow_types (struct type
*follow_type
)
1649 int make_volatile
= 0;
1650 int make_addr_space
= 0;
1654 switch (pop_type ())
1659 follow_type
= make_cv_type (make_const
,
1660 TYPE_VOLATILE (follow_type
),
1663 follow_type
= make_cv_type (TYPE_CONST (follow_type
),
1666 if (make_addr_space
)
1667 follow_type
= make_type_with_address_space (follow_type
,
1669 make_const
= make_volatile
= 0;
1670 make_addr_space
= 0;
1678 case tp_space_identifier
:
1679 make_addr_space
= pop_type_int ();
1682 follow_type
= lookup_pointer_type (follow_type
);
1684 follow_type
= make_cv_type (make_const
,
1685 TYPE_VOLATILE (follow_type
),
1688 follow_type
= make_cv_type (TYPE_CONST (follow_type
),
1691 if (make_addr_space
)
1692 follow_type
= make_type_with_address_space (follow_type
,
1694 make_const
= make_volatile
= 0;
1695 make_addr_space
= 0;
1698 follow_type
= lookup_reference_type (follow_type
);
1700 follow_type
= make_cv_type (make_const
,
1701 TYPE_VOLATILE (follow_type
),
1704 follow_type
= make_cv_type (TYPE_CONST (follow_type
),
1707 if (make_addr_space
)
1708 follow_type
= make_type_with_address_space (follow_type
,
1710 make_const
= make_volatile
= 0;
1711 make_addr_space
= 0;
1714 array_size
= pop_type_int ();
1715 /* FIXME-type-allocation: need a way to free this type when we are
1718 lookup_array_range_type (follow_type
,
1719 0, array_size
>= 0 ? array_size
- 1 : 0);
1721 TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (follow_type
) = 1;
1724 /* FIXME-type-allocation: need a way to free this type when we are
1726 follow_type
= lookup_function_type (follow_type
);
1729 case tp_function_with_arguments
:
1731 VEC (type_ptr
) *args
= pop_typelist ();
1734 = lookup_function_type_with_arguments (follow_type
,
1735 VEC_length (type_ptr
, args
),
1736 VEC_address (type_ptr
,
1738 VEC_free (type_ptr
, args
);
1744 struct type_stack
*stack
= pop_type_stack ();
1745 /* Sort of ugly, but not really much worse than the
1747 struct type_stack save
= type_stack
;
1749 type_stack
= *stack
;
1750 follow_type
= follow_types (follow_type
);
1751 gdb_assert (type_stack
.depth
== 0);
1757 gdb_assert_not_reached ("unrecognized tp_ value in follow_types");
1762 /* This function avoids direct calls to fprintf
1763 in the parser generated debug code. */
1765 parser_fprintf (FILE *x
, const char *y
, ...)
1771 vfprintf_unfiltered (gdb_stderr
, y
, args
);
1774 fprintf_unfiltered (gdb_stderr
, " Unknown FILE used.\n");
1775 vfprintf_unfiltered (gdb_stderr
, y
, args
);
1780 /* Implementation of the exp_descriptor method operator_check. */
1783 operator_check_standard (struct expression
*exp
, int pos
,
1784 int (*objfile_func
) (struct objfile
*objfile
,
1788 const union exp_element
*const elts
= exp
->elts
;
1789 struct type
*type
= NULL
;
1790 struct objfile
*objfile
= NULL
;
1792 /* Extended operators should have been already handled by exp_descriptor
1793 iterate method of its specific language. */
1794 gdb_assert (elts
[pos
].opcode
< OP_EXTENDED0
);
1796 /* Track the callers of write_exp_elt_type for this table. */
1798 switch (elts
[pos
].opcode
)
1811 type
= elts
[pos
+ 1].type
;
1816 LONGEST arg
, nargs
= elts
[pos
+ 1].longconst
;
1818 for (arg
= 0; arg
< nargs
; arg
++)
1820 struct type
*type
= elts
[pos
+ 2 + arg
].type
;
1821 struct objfile
*objfile
= TYPE_OBJFILE (type
);
1823 if (objfile
&& (*objfile_func
) (objfile
, data
))
1829 case UNOP_MEMVAL_TLS
:
1830 objfile
= elts
[pos
+ 1].objfile
;
1831 type
= elts
[pos
+ 2].type
;
1836 const struct block
*const block
= elts
[pos
+ 1].block
;
1837 const struct symbol
*const symbol
= elts
[pos
+ 2].symbol
;
1839 /* Check objfile where the variable itself is placed.
1840 SYMBOL_OBJ_SECTION (symbol) may be NULL. */
1841 if ((*objfile_func
) (SYMBOL_SYMTAB (symbol
)->objfile
, data
))
1844 /* Check objfile where is placed the code touching the variable. */
1845 objfile
= lookup_objfile_from_block (block
);
1847 type
= SYMBOL_TYPE (symbol
);
1852 /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
1854 if (type
&& TYPE_OBJFILE (type
)
1855 && (*objfile_func
) (TYPE_OBJFILE (type
), data
))
1857 if (objfile
&& (*objfile_func
) (objfile
, data
))
1863 /* Call OBJFILE_FUNC for any TYPE and OBJFILE found being referenced by EXP.
1864 The functions are never called with NULL OBJFILE. Functions get passed an
1865 arbitrary caller supplied DATA pointer. If any of the functions returns
1866 non-zero value then (any other) non-zero value is immediately returned to
1867 the caller. Otherwise zero is returned after iterating through whole EXP.
1871 exp_iterate (struct expression
*exp
,
1872 int (*objfile_func
) (struct objfile
*objfile
, void *data
),
1877 for (endpos
= exp
->nelts
; endpos
> 0; )
1879 int pos
, args
, oplen
= 0;
1881 operator_length (exp
, endpos
, &oplen
, &args
);
1882 gdb_assert (oplen
> 0);
1884 pos
= endpos
- oplen
;
1885 if (exp
->language_defn
->la_exp_desc
->operator_check (exp
, pos
,
1886 objfile_func
, data
))
1895 /* Helper for exp_uses_objfile. */
1898 exp_uses_objfile_iter (struct objfile
*exp_objfile
, void *objfile_voidp
)
1900 struct objfile
*objfile
= objfile_voidp
;
1902 if (exp_objfile
->separate_debug_objfile_backlink
)
1903 exp_objfile
= exp_objfile
->separate_debug_objfile_backlink
;
1905 return exp_objfile
== objfile
;
1908 /* Return 1 if EXP uses OBJFILE (and will become dangling when OBJFILE
1909 is unloaded), otherwise return 0. OBJFILE must not be a separate debug info
1913 exp_uses_objfile (struct expression
*exp
, struct objfile
*objfile
)
1915 gdb_assert (objfile
->separate_debug_objfile_backlink
== NULL
);
1917 return exp_iterate (exp
, exp_uses_objfile_iter
, objfile
);
1921 _initialize_parse (void)
1923 type_stack
.size
= 0;
1924 type_stack
.depth
= 0;
1925 type_stack
.elements
= NULL
;
1927 add_setshow_zuinteger_cmd ("expression", class_maintenance
,
1929 _("Set expression debugging."),
1930 _("Show expression debugging."),
1931 _("When non-zero, the internal representation "
1932 "of expressions will be printed."),
1934 show_expressiondebug
,
1935 &setdebuglist
, &showdebuglist
);
1936 add_setshow_boolean_cmd ("parser", class_maintenance
,
1938 _("Set parser debugging."),
1939 _("Show parser debugging."),
1940 _("When non-zero, expression parser "
1941 "tracing will be enabled."),
1944 &setdebuglist
, &showdebuglist
);