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c906108c | 1 | /* Parse expressions for GDB. |
c4a172b5 | 2 | |
0b302171 JB |
3 | Copyright (C) 1986, 1989-2001, 2004-2005, 2007-2012 Free Software |
4 | Foundation, Inc. | |
c4a172b5 | 5 | |
c906108c SS |
6 | Modified from expread.y by the Department of Computer Science at the |
7 | State University of New York at Buffalo, 1991. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | /* Parse an expression from text in a string, | |
ae0c443d | 25 | and return the result as a struct expression pointer. |
c906108c SS |
26 | That structure contains arithmetic operations in reverse polish, |
27 | with constants represented by operations that are followed by special data. | |
28 | See expression.h for the details of the format. | |
29 | What is important here is that it can be built up sequentially | |
30 | during the process of parsing; the lower levels of the tree always | |
31 | come first in the result. */ | |
c5aa993b | 32 | |
c906108c | 33 | #include "defs.h" |
12c89474 | 34 | #include <ctype.h> |
e17c207e | 35 | #include "arch-utils.h" |
c906108c | 36 | #include "gdb_string.h" |
c906108c SS |
37 | #include "symtab.h" |
38 | #include "gdbtypes.h" | |
39 | #include "frame.h" | |
40 | #include "expression.h" | |
41 | #include "value.h" | |
42 | #include "command.h" | |
43 | #include "language.h" | |
0b4e1325 | 44 | #include "f-lang.h" |
c906108c SS |
45 | #include "parser-defs.h" |
46 | #include "gdbcmd.h" | |
c5aa993b | 47 | #include "symfile.h" /* for overlay functions */ |
f57d151a | 48 | #include "inferior.h" |
d16aafd8 | 49 | #include "doublest.h" |
0406ec40 | 50 | #include "gdb_assert.h" |
fe898f56 | 51 | #include "block.h" |
59f92a09 | 52 | #include "source.h" |
9e35dae4 | 53 | #include "objfiles.h" |
65d12d83 | 54 | #include "exceptions.h" |
029a67e4 | 55 | #include "user-regs.h" |
e2305d34 | 56 | |
5f9769d1 PH |
57 | /* Standard set of definitions for printing, dumping, prefixifying, |
58 | * and evaluating expressions. */ | |
59 | ||
60 | const struct exp_descriptor exp_descriptor_standard = | |
61 | { | |
62 | print_subexp_standard, | |
63 | operator_length_standard, | |
c0201579 | 64 | operator_check_standard, |
5f9769d1 PH |
65 | op_name_standard, |
66 | dump_subexp_body_standard, | |
67 | evaluate_subexp_standard | |
68 | }; | |
c906108c SS |
69 | \f |
70 | /* Global variables declared in parser-defs.h (and commented there). */ | |
71 | struct expression *expout; | |
72 | int expout_size; | |
73 | int expout_ptr; | |
74 | struct block *expression_context_block; | |
84f0252a | 75 | CORE_ADDR expression_context_pc; |
c906108c SS |
76 | struct block *innermost_block; |
77 | int arglist_len; | |
78 | union type_stack_elt *type_stack; | |
79 | int type_stack_depth, type_stack_size; | |
80 | char *lexptr; | |
665132f9 | 81 | char *prev_lexptr; |
c906108c SS |
82 | int paren_depth; |
83 | int comma_terminates; | |
3a913e29 | 84 | |
65d12d83 TT |
85 | /* True if parsing an expression to find a field reference. This is |
86 | only used by completion. */ | |
87 | int in_parse_field; | |
88 | ||
89 | /* The index of the last struct expression directly before a '.' or | |
90 | '->'. This is set when parsing and is only used when completing a | |
91 | field name. It is -1 if no dereference operation was found. */ | |
92 | static int expout_last_struct = -1; | |
c906108c | 93 | \f |
c906108c | 94 | static int expressiondebug = 0; |
920d2a44 AC |
95 | static void |
96 | show_expressiondebug (struct ui_file *file, int from_tty, | |
97 | struct cmd_list_element *c, const char *value) | |
98 | { | |
99 | fprintf_filtered (file, _("Expression debugging is %s.\n"), value); | |
100 | } | |
c906108c | 101 | |
92981e24 TT |
102 | |
103 | /* Non-zero if an expression parser should set yydebug. */ | |
104 | int parser_debug; | |
105 | ||
106 | static void | |
107 | show_parserdebug (struct ui_file *file, int from_tty, | |
108 | struct cmd_list_element *c, const char *value) | |
109 | { | |
110 | fprintf_filtered (file, _("Parser debugging is %s.\n"), value); | |
111 | } | |
112 | ||
113 | ||
74b7792f | 114 | static void free_funcalls (void *ignore); |
c906108c | 115 | |
65d12d83 | 116 | static int prefixify_expression (struct expression *); |
c906108c | 117 | |
65d12d83 TT |
118 | static int prefixify_subexp (struct expression *, struct expression *, int, |
119 | int); | |
c906108c | 120 | |
e85c3284 | 121 | static struct expression *parse_exp_in_context (char **, struct block *, int, |
65d12d83 | 122 | int, int *); |
e85c3284 | 123 | |
a14ed312 | 124 | void _initialize_parse (void); |
392a587b | 125 | |
c906108c SS |
126 | /* Data structure for saving values of arglist_len for function calls whose |
127 | arguments contain other function calls. */ | |
128 | ||
129 | struct funcall | |
130 | { | |
131 | struct funcall *next; | |
132 | int arglist_len; | |
133 | }; | |
134 | ||
135 | static struct funcall *funcall_chain; | |
136 | ||
c906108c SS |
137 | /* Begin counting arguments for a function call, |
138 | saving the data about any containing call. */ | |
139 | ||
140 | void | |
fba45db2 | 141 | start_arglist (void) |
c906108c | 142 | { |
f86f5ca3 | 143 | struct funcall *new; |
c906108c SS |
144 | |
145 | new = (struct funcall *) xmalloc (sizeof (struct funcall)); | |
146 | new->next = funcall_chain; | |
147 | new->arglist_len = arglist_len; | |
148 | arglist_len = 0; | |
149 | funcall_chain = new; | |
150 | } | |
151 | ||
152 | /* Return the number of arguments in a function call just terminated, | |
153 | and restore the data for the containing function call. */ | |
154 | ||
155 | int | |
fba45db2 | 156 | end_arglist (void) |
c906108c | 157 | { |
f86f5ca3 PH |
158 | int val = arglist_len; |
159 | struct funcall *call = funcall_chain; | |
ad3bbd48 | 160 | |
c906108c SS |
161 | funcall_chain = call->next; |
162 | arglist_len = call->arglist_len; | |
b8c9b27d | 163 | xfree (call); |
c906108c SS |
164 | return val; |
165 | } | |
166 | ||
167 | /* Free everything in the funcall chain. | |
168 | Used when there is an error inside parsing. */ | |
169 | ||
170 | static void | |
74b7792f | 171 | free_funcalls (void *ignore) |
c906108c | 172 | { |
f86f5ca3 | 173 | struct funcall *call, *next; |
c906108c SS |
174 | |
175 | for (call = funcall_chain; call; call = next) | |
176 | { | |
177 | next = call->next; | |
b8c9b27d | 178 | xfree (call); |
c906108c SS |
179 | } |
180 | } | |
181 | \f | |
ae0c443d | 182 | /* This page contains the functions for adding data to the struct expression |
c906108c SS |
183 | being constructed. */ |
184 | ||
185 | /* Add one element to the end of the expression. */ | |
186 | ||
187 | /* To avoid a bug in the Sun 4 compiler, we pass things that can fit into | |
0df8b418 | 188 | a register through here. */ |
c906108c | 189 | |
ae0c443d JK |
190 | static void |
191 | write_exp_elt (const union exp_element *expelt) | |
c906108c SS |
192 | { |
193 | if (expout_ptr >= expout_size) | |
194 | { | |
195 | expout_size *= 2; | |
196 | expout = (struct expression *) | |
197 | xrealloc ((char *) expout, sizeof (struct expression) | |
198 | + EXP_ELEM_TO_BYTES (expout_size)); | |
199 | } | |
ae0c443d | 200 | expout->elts[expout_ptr++] = *expelt; |
c906108c SS |
201 | } |
202 | ||
203 | void | |
fba45db2 | 204 | write_exp_elt_opcode (enum exp_opcode expelt) |
c906108c SS |
205 | { |
206 | union exp_element tmp; | |
207 | ||
ad3bbd48 | 208 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 209 | tmp.opcode = expelt; |
ae0c443d | 210 | write_exp_elt (&tmp); |
c906108c SS |
211 | } |
212 | ||
213 | void | |
fba45db2 | 214 | write_exp_elt_sym (struct symbol *expelt) |
c906108c SS |
215 | { |
216 | union exp_element tmp; | |
217 | ||
ad3bbd48 | 218 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 219 | tmp.symbol = expelt; |
ae0c443d | 220 | write_exp_elt (&tmp); |
c906108c SS |
221 | } |
222 | ||
223 | void | |
fba45db2 | 224 | write_exp_elt_block (struct block *b) |
c906108c SS |
225 | { |
226 | union exp_element tmp; | |
ad3bbd48 | 227 | |
09153d55 | 228 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 229 | tmp.block = b; |
ae0c443d | 230 | write_exp_elt (&tmp); |
c906108c SS |
231 | } |
232 | ||
9e35dae4 DJ |
233 | void |
234 | write_exp_elt_objfile (struct objfile *objfile) | |
235 | { | |
236 | union exp_element tmp; | |
ad3bbd48 | 237 | |
9e35dae4 DJ |
238 | memset (&tmp, 0, sizeof (union exp_element)); |
239 | tmp.objfile = objfile; | |
ae0c443d | 240 | write_exp_elt (&tmp); |
9e35dae4 DJ |
241 | } |
242 | ||
c906108c | 243 | void |
fba45db2 | 244 | write_exp_elt_longcst (LONGEST expelt) |
c906108c SS |
245 | { |
246 | union exp_element tmp; | |
247 | ||
ad3bbd48 | 248 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 249 | tmp.longconst = expelt; |
ae0c443d | 250 | write_exp_elt (&tmp); |
c906108c SS |
251 | } |
252 | ||
253 | void | |
fba45db2 | 254 | write_exp_elt_dblcst (DOUBLEST expelt) |
c906108c SS |
255 | { |
256 | union exp_element tmp; | |
257 | ||
ad3bbd48 | 258 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 259 | tmp.doubleconst = expelt; |
ae0c443d | 260 | write_exp_elt (&tmp); |
c906108c SS |
261 | } |
262 | ||
27bc4d80 TJB |
263 | void |
264 | write_exp_elt_decfloatcst (gdb_byte expelt[16]) | |
265 | { | |
266 | union exp_element tmp; | |
267 | int index; | |
268 | ||
269 | for (index = 0; index < 16; index++) | |
270 | tmp.decfloatconst[index] = expelt[index]; | |
271 | ||
ae0c443d | 272 | write_exp_elt (&tmp); |
27bc4d80 TJB |
273 | } |
274 | ||
c906108c | 275 | void |
fba45db2 | 276 | write_exp_elt_type (struct type *expelt) |
c906108c SS |
277 | { |
278 | union exp_element tmp; | |
279 | ||
ad3bbd48 | 280 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 281 | tmp.type = expelt; |
ae0c443d | 282 | write_exp_elt (&tmp); |
c906108c SS |
283 | } |
284 | ||
285 | void | |
fba45db2 | 286 | write_exp_elt_intern (struct internalvar *expelt) |
c906108c SS |
287 | { |
288 | union exp_element tmp; | |
289 | ||
ad3bbd48 | 290 | memset (&tmp, 0, sizeof (union exp_element)); |
c906108c | 291 | tmp.internalvar = expelt; |
ae0c443d | 292 | write_exp_elt (&tmp); |
c906108c SS |
293 | } |
294 | ||
295 | /* Add a string constant to the end of the expression. | |
296 | ||
297 | String constants are stored by first writing an expression element | |
298 | that contains the length of the string, then stuffing the string | |
299 | constant itself into however many expression elements are needed | |
300 | to hold it, and then writing another expression element that contains | |
0df8b418 | 301 | the length of the string. I.e. an expression element at each end of |
c906108c SS |
302 | the string records the string length, so you can skip over the |
303 | expression elements containing the actual string bytes from either | |
304 | end of the string. Note that this also allows gdb to handle | |
305 | strings with embedded null bytes, as is required for some languages. | |
306 | ||
307 | Don't be fooled by the fact that the string is null byte terminated, | |
bc3b79fd | 308 | this is strictly for the convenience of debugging gdb itself. |
c906108c SS |
309 | Gdb does not depend up the string being null terminated, since the |
310 | actual length is recorded in expression elements at each end of the | |
311 | string. The null byte is taken into consideration when computing how | |
312 | many expression elements are required to hold the string constant, of | |
0df8b418 | 313 | course. */ |
c906108c SS |
314 | |
315 | ||
316 | void | |
fba45db2 | 317 | write_exp_string (struct stoken str) |
c906108c | 318 | { |
f86f5ca3 PH |
319 | int len = str.length; |
320 | int lenelt; | |
321 | char *strdata; | |
c906108c SS |
322 | |
323 | /* Compute the number of expression elements required to hold the string | |
324 | (including a null byte terminator), along with one expression element | |
325 | at each end to record the actual string length (not including the | |
0df8b418 | 326 | null byte terminator). */ |
c906108c SS |
327 | |
328 | lenelt = 2 + BYTES_TO_EXP_ELEM (len + 1); | |
329 | ||
330 | /* Ensure that we have enough available expression elements to store | |
0df8b418 | 331 | everything. */ |
c906108c SS |
332 | |
333 | if ((expout_ptr + lenelt) >= expout_size) | |
334 | { | |
335 | expout_size = max (expout_size * 2, expout_ptr + lenelt + 10); | |
336 | expout = (struct expression *) | |
337 | xrealloc ((char *) expout, (sizeof (struct expression) | |
338 | + EXP_ELEM_TO_BYTES (expout_size))); | |
339 | } | |
340 | ||
341 | /* Write the leading length expression element (which advances the current | |
342 | expression element index), then write the string constant followed by a | |
343 | terminating null byte, and then write the trailing length expression | |
0df8b418 | 344 | element. */ |
c906108c SS |
345 | |
346 | write_exp_elt_longcst ((LONGEST) len); | |
347 | strdata = (char *) &expout->elts[expout_ptr]; | |
348 | memcpy (strdata, str.ptr, len); | |
349 | *(strdata + len) = '\0'; | |
350 | expout_ptr += lenelt - 2; | |
351 | write_exp_elt_longcst ((LONGEST) len); | |
352 | } | |
353 | ||
6c7a06a3 TT |
354 | /* Add a vector of string constants to the end of the expression. |
355 | ||
356 | This adds an OP_STRING operation, but encodes the contents | |
357 | differently from write_exp_string. The language is expected to | |
358 | handle evaluation of this expression itself. | |
359 | ||
360 | After the usual OP_STRING header, TYPE is written into the | |
361 | expression as a long constant. The interpretation of this field is | |
362 | up to the language evaluator. | |
363 | ||
364 | Next, each string in VEC is written. The length is written as a | |
365 | long constant, followed by the contents of the string. */ | |
366 | ||
367 | void | |
368 | write_exp_string_vector (int type, struct stoken_vector *vec) | |
369 | { | |
370 | int i, n_slots, len; | |
371 | ||
372 | /* Compute the size. We compute the size in number of slots to | |
373 | avoid issues with string padding. */ | |
374 | n_slots = 0; | |
375 | for (i = 0; i < vec->len; ++i) | |
376 | { | |
377 | /* One slot for the length of this element, plus the number of | |
378 | slots needed for this string. */ | |
379 | n_slots += 1 + BYTES_TO_EXP_ELEM (vec->tokens[i].length); | |
380 | } | |
381 | ||
382 | /* One more slot for the type of the string. */ | |
383 | ++n_slots; | |
384 | ||
385 | /* Now compute a phony string length. */ | |
386 | len = EXP_ELEM_TO_BYTES (n_slots) - 1; | |
387 | ||
388 | n_slots += 4; | |
389 | if ((expout_ptr + n_slots) >= expout_size) | |
390 | { | |
391 | expout_size = max (expout_size * 2, expout_ptr + n_slots + 10); | |
392 | expout = (struct expression *) | |
393 | xrealloc ((char *) expout, (sizeof (struct expression) | |
394 | + EXP_ELEM_TO_BYTES (expout_size))); | |
395 | } | |
396 | ||
397 | write_exp_elt_opcode (OP_STRING); | |
398 | write_exp_elt_longcst (len); | |
399 | write_exp_elt_longcst (type); | |
400 | ||
401 | for (i = 0; i < vec->len; ++i) | |
402 | { | |
403 | write_exp_elt_longcst (vec->tokens[i].length); | |
404 | memcpy (&expout->elts[expout_ptr], vec->tokens[i].ptr, | |
405 | vec->tokens[i].length); | |
406 | expout_ptr += BYTES_TO_EXP_ELEM (vec->tokens[i].length); | |
407 | } | |
408 | ||
409 | write_exp_elt_longcst (len); | |
410 | write_exp_elt_opcode (OP_STRING); | |
411 | } | |
412 | ||
c906108c SS |
413 | /* Add a bitstring constant to the end of the expression. |
414 | ||
415 | Bitstring constants are stored by first writing an expression element | |
416 | that contains the length of the bitstring (in bits), then stuffing the | |
417 | bitstring constant itself into however many expression elements are | |
418 | needed to hold it, and then writing another expression element that | |
0df8b418 | 419 | contains the length of the bitstring. I.e. an expression element at |
c906108c SS |
420 | each end of the bitstring records the bitstring length, so you can skip |
421 | over the expression elements containing the actual bitstring bytes from | |
0df8b418 | 422 | either end of the bitstring. */ |
c906108c SS |
423 | |
424 | void | |
fba45db2 | 425 | write_exp_bitstring (struct stoken str) |
c906108c | 426 | { |
f86f5ca3 PH |
427 | int bits = str.length; /* length in bits */ |
428 | int len = (bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; | |
429 | int lenelt; | |
430 | char *strdata; | |
c906108c SS |
431 | |
432 | /* Compute the number of expression elements required to hold the bitstring, | |
433 | along with one expression element at each end to record the actual | |
0df8b418 | 434 | bitstring length in bits. */ |
c906108c SS |
435 | |
436 | lenelt = 2 + BYTES_TO_EXP_ELEM (len); | |
437 | ||
438 | /* Ensure that we have enough available expression elements to store | |
0df8b418 | 439 | everything. */ |
c906108c SS |
440 | |
441 | if ((expout_ptr + lenelt) >= expout_size) | |
442 | { | |
443 | expout_size = max (expout_size * 2, expout_ptr + lenelt + 10); | |
444 | expout = (struct expression *) | |
445 | xrealloc ((char *) expout, (sizeof (struct expression) | |
446 | + EXP_ELEM_TO_BYTES (expout_size))); | |
447 | } | |
448 | ||
449 | /* Write the leading length expression element (which advances the current | |
450 | expression element index), then write the bitstring constant, and then | |
0df8b418 | 451 | write the trailing length expression element. */ |
c906108c SS |
452 | |
453 | write_exp_elt_longcst ((LONGEST) bits); | |
454 | strdata = (char *) &expout->elts[expout_ptr]; | |
455 | memcpy (strdata, str.ptr, len); | |
456 | expout_ptr += lenelt - 2; | |
457 | write_exp_elt_longcst ((LONGEST) bits); | |
458 | } | |
459 | ||
460 | /* Add the appropriate elements for a minimal symbol to the end of | |
c841afd5 | 461 | the expression. */ |
c906108c | 462 | |
c906108c | 463 | void |
c841afd5 | 464 | write_exp_msymbol (struct minimal_symbol *msymbol) |
c906108c | 465 | { |
bccdca4a UW |
466 | struct objfile *objfile = msymbol_objfile (msymbol); |
467 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
468 | ||
469 | CORE_ADDR addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
714835d5 | 470 | struct obj_section *section = SYMBOL_OBJ_SECTION (msymbol); |
712f90be | 471 | enum minimal_symbol_type type = MSYMBOL_TYPE (msymbol); |
bccdca4a UW |
472 | CORE_ADDR pc; |
473 | ||
474 | /* The minimal symbol might point to a function descriptor; | |
475 | resolve it to the actual code address instead. */ | |
476 | pc = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, ¤t_target); | |
477 | if (pc != addr) | |
478 | { | |
0875794a JK |
479 | struct minimal_symbol *ifunc_msym = lookup_minimal_symbol_by_pc (pc); |
480 | ||
bccdca4a UW |
481 | /* In this case, assume we have a code symbol instead of |
482 | a data symbol. */ | |
0875794a JK |
483 | |
484 | if (ifunc_msym != NULL && MSYMBOL_TYPE (ifunc_msym) == mst_text_gnu_ifunc | |
485 | && SYMBOL_VALUE_ADDRESS (ifunc_msym) == pc) | |
486 | { | |
487 | /* A function descriptor has been resolved but PC is still in the | |
488 | STT_GNU_IFUNC resolver body (such as because inferior does not | |
489 | run to be able to call it). */ | |
490 | ||
491 | type = mst_text_gnu_ifunc; | |
492 | } | |
493 | else | |
494 | type = mst_text; | |
714835d5 | 495 | section = NULL; |
bccdca4a UW |
496 | addr = pc; |
497 | } | |
498 | ||
499 | if (overlay_debugging) | |
714835d5 | 500 | addr = symbol_overlayed_address (addr, section); |
c906108c SS |
501 | |
502 | write_exp_elt_opcode (OP_LONG); | |
a858089e | 503 | /* Let's make the type big enough to hold a 64-bit address. */ |
46bf5051 | 504 | write_exp_elt_type (objfile_type (objfile)->builtin_core_addr); |
c906108c | 505 | write_exp_elt_longcst ((LONGEST) addr); |
c906108c SS |
506 | write_exp_elt_opcode (OP_LONG); |
507 | ||
714835d5 | 508 | if (section && section->the_bfd_section->flags & SEC_THREAD_LOCAL) |
9e35dae4 | 509 | { |
9e35dae4 | 510 | write_exp_elt_opcode (UNOP_MEMVAL_TLS); |
bccdca4a | 511 | write_exp_elt_objfile (objfile); |
46bf5051 | 512 | write_exp_elt_type (objfile_type (objfile)->nodebug_tls_symbol); |
9e35dae4 DJ |
513 | write_exp_elt_opcode (UNOP_MEMVAL_TLS); |
514 | return; | |
515 | } | |
516 | ||
c906108c | 517 | write_exp_elt_opcode (UNOP_MEMVAL); |
bccdca4a | 518 | switch (type) |
c906108c SS |
519 | { |
520 | case mst_text: | |
521 | case mst_file_text: | |
522 | case mst_solib_trampoline: | |
46bf5051 | 523 | write_exp_elt_type (objfile_type (objfile)->nodebug_text_symbol); |
c906108c SS |
524 | break; |
525 | ||
0875794a JK |
526 | case mst_text_gnu_ifunc: |
527 | write_exp_elt_type (objfile_type (objfile) | |
528 | ->nodebug_text_gnu_ifunc_symbol); | |
529 | break; | |
530 | ||
c906108c SS |
531 | case mst_data: |
532 | case mst_file_data: | |
533 | case mst_bss: | |
534 | case mst_file_bss: | |
46bf5051 | 535 | write_exp_elt_type (objfile_type (objfile)->nodebug_data_symbol); |
c906108c SS |
536 | break; |
537 | ||
0875794a JK |
538 | case mst_slot_got_plt: |
539 | write_exp_elt_type (objfile_type (objfile)->nodebug_got_plt_symbol); | |
540 | break; | |
541 | ||
c906108c | 542 | default: |
46bf5051 | 543 | write_exp_elt_type (objfile_type (objfile)->nodebug_unknown_symbol); |
c906108c SS |
544 | break; |
545 | } | |
546 | write_exp_elt_opcode (UNOP_MEMVAL); | |
547 | } | |
65d12d83 TT |
548 | |
549 | /* Mark the current index as the starting location of a structure | |
550 | expression. This is used when completing on field names. */ | |
551 | ||
552 | void | |
553 | mark_struct_expression (void) | |
554 | { | |
555 | expout_last_struct = expout_ptr; | |
556 | } | |
557 | ||
c906108c SS |
558 | \f |
559 | /* Recognize tokens that start with '$'. These include: | |
560 | ||
c5aa993b JM |
561 | $regname A native register name or a "standard |
562 | register name". | |
c906108c | 563 | |
c5aa993b JM |
564 | $variable A convenience variable with a name chosen |
565 | by the user. | |
c906108c | 566 | |
c5aa993b JM |
567 | $digits Value history with index <digits>, starting |
568 | from the first value which has index 1. | |
c906108c | 569 | |
c5aa993b | 570 | $$digits Value history with index <digits> relative |
0df8b418 | 571 | to the last value. I.e. $$0 is the last |
c5aa993b JM |
572 | value, $$1 is the one previous to that, $$2 |
573 | is the one previous to $$1, etc. | |
c906108c | 574 | |
c5aa993b | 575 | $ | $0 | $$0 The last value in the value history. |
c906108c | 576 | |
c5aa993b | 577 | $$ An abbreviation for the second to the last |
0df8b418 | 578 | value in the value history, I.e. $$1 */ |
c906108c SS |
579 | |
580 | void | |
fba45db2 | 581 | write_dollar_variable (struct stoken str) |
c906108c | 582 | { |
d7318818 RC |
583 | struct symbol *sym = NULL; |
584 | struct minimal_symbol *msym = NULL; | |
c4a3d09a | 585 | struct internalvar *isym = NULL; |
d7318818 | 586 | |
c906108c | 587 | /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1) |
0df8b418 | 588 | and $$digits (equivalent to $<-digits> if you could type that). */ |
c906108c | 589 | |
c906108c SS |
590 | int negate = 0; |
591 | int i = 1; | |
592 | /* Double dollar means negate the number and add -1 as well. | |
593 | Thus $$ alone means -1. */ | |
594 | if (str.length >= 2 && str.ptr[1] == '$') | |
595 | { | |
596 | negate = 1; | |
597 | i = 2; | |
598 | } | |
599 | if (i == str.length) | |
600 | { | |
0df8b418 | 601 | /* Just dollars (one or two). */ |
c5aa993b | 602 | i = -negate; |
c906108c SS |
603 | goto handle_last; |
604 | } | |
605 | /* Is the rest of the token digits? */ | |
606 | for (; i < str.length; i++) | |
607 | if (!(str.ptr[i] >= '0' && str.ptr[i] <= '9')) | |
608 | break; | |
609 | if (i == str.length) | |
610 | { | |
611 | i = atoi (str.ptr + 1 + negate); | |
612 | if (negate) | |
c5aa993b | 613 | i = -i; |
c906108c SS |
614 | goto handle_last; |
615 | } | |
c5aa993b | 616 | |
c906108c SS |
617 | /* Handle tokens that refer to machine registers: |
618 | $ followed by a register name. */ | |
d80b854b | 619 | i = user_reg_map_name_to_regnum (parse_gdbarch, |
029a67e4 | 620 | str.ptr + 1, str.length - 1); |
c5aa993b | 621 | if (i >= 0) |
c906108c SS |
622 | goto handle_register; |
623 | ||
c4a3d09a MF |
624 | /* Any names starting with $ are probably debugger internal variables. */ |
625 | ||
626 | isym = lookup_only_internalvar (copy_name (str) + 1); | |
627 | if (isym) | |
628 | { | |
629 | write_exp_elt_opcode (OP_INTERNALVAR); | |
630 | write_exp_elt_intern (isym); | |
631 | write_exp_elt_opcode (OP_INTERNALVAR); | |
632 | return; | |
633 | } | |
634 | ||
d7318818 | 635 | /* On some systems, such as HP-UX and hppa-linux, certain system routines |
0df8b418 | 636 | have names beginning with $ or $$. Check for those, first. */ |
d7318818 RC |
637 | |
638 | sym = lookup_symbol (copy_name (str), (struct block *) NULL, | |
2570f2b7 | 639 | VAR_DOMAIN, (int *) NULL); |
d7318818 RC |
640 | if (sym) |
641 | { | |
642 | write_exp_elt_opcode (OP_VAR_VALUE); | |
643 | write_exp_elt_block (block_found); /* set by lookup_symbol */ | |
644 | write_exp_elt_sym (sym); | |
645 | write_exp_elt_opcode (OP_VAR_VALUE); | |
646 | return; | |
647 | } | |
648 | msym = lookup_minimal_symbol (copy_name (str), NULL, NULL); | |
649 | if (msym) | |
c906108c | 650 | { |
c841afd5 | 651 | write_exp_msymbol (msym); |
d7318818 | 652 | return; |
c906108c | 653 | } |
c5aa993b | 654 | |
c4a3d09a | 655 | /* Any other names are assumed to be debugger internal variables. */ |
c906108c SS |
656 | |
657 | write_exp_elt_opcode (OP_INTERNALVAR); | |
c4a3d09a | 658 | write_exp_elt_intern (create_internalvar (copy_name (str) + 1)); |
c5aa993b | 659 | write_exp_elt_opcode (OP_INTERNALVAR); |
c906108c | 660 | return; |
c5aa993b | 661 | handle_last: |
c906108c SS |
662 | write_exp_elt_opcode (OP_LAST); |
663 | write_exp_elt_longcst ((LONGEST) i); | |
664 | write_exp_elt_opcode (OP_LAST); | |
665 | return; | |
c5aa993b | 666 | handle_register: |
c906108c | 667 | write_exp_elt_opcode (OP_REGISTER); |
67f3407f DJ |
668 | str.length--; |
669 | str.ptr++; | |
670 | write_exp_string (str); | |
c5aa993b | 671 | write_exp_elt_opcode (OP_REGISTER); |
c906108c SS |
672 | return; |
673 | } | |
674 | ||
675 | ||
c906108c | 676 | char * |
fba45db2 | 677 | find_template_name_end (char *p) |
c906108c SS |
678 | { |
679 | int depth = 1; | |
680 | int just_seen_right = 0; | |
681 | int just_seen_colon = 0; | |
682 | int just_seen_space = 0; | |
c5aa993b | 683 | |
c906108c SS |
684 | if (!p || (*p != '<')) |
685 | return 0; | |
686 | ||
687 | while (*++p) | |
688 | { | |
689 | switch (*p) | |
c5aa993b JM |
690 | { |
691 | case '\'': | |
692 | case '\"': | |
693 | case '{': | |
694 | case '}': | |
0df8b418 | 695 | /* In future, may want to allow these?? */ |
c5aa993b JM |
696 | return 0; |
697 | case '<': | |
698 | depth++; /* start nested template */ | |
699 | if (just_seen_colon || just_seen_right || just_seen_space) | |
700 | return 0; /* but not after : or :: or > or space */ | |
701 | break; | |
702 | case '>': | |
703 | if (just_seen_colon || just_seen_right) | |
704 | return 0; /* end a (nested?) template */ | |
705 | just_seen_right = 1; /* but not after : or :: */ | |
706 | if (--depth == 0) /* also disallow >>, insist on > > */ | |
707 | return ++p; /* if outermost ended, return */ | |
708 | break; | |
709 | case ':': | |
710 | if (just_seen_space || (just_seen_colon > 1)) | |
711 | return 0; /* nested class spec coming up */ | |
712 | just_seen_colon++; /* we allow :: but not :::: */ | |
713 | break; | |
714 | case ' ': | |
715 | break; | |
716 | default: | |
717 | if (!((*p >= 'a' && *p <= 'z') || /* allow token chars */ | |
718 | (*p >= 'A' && *p <= 'Z') || | |
719 | (*p >= '0' && *p <= '9') || | |
720 | (*p == '_') || (*p == ',') || /* commas for template args */ | |
721 | (*p == '&') || (*p == '*') || /* pointer and ref types */ | |
722 | (*p == '(') || (*p == ')') || /* function types */ | |
723 | (*p == '[') || (*p == ']'))) /* array types */ | |
724 | return 0; | |
725 | } | |
c906108c | 726 | if (*p != ' ') |
c5aa993b | 727 | just_seen_space = 0; |
c906108c | 728 | if (*p != ':') |
c5aa993b | 729 | just_seen_colon = 0; |
c906108c | 730 | if (*p != '>') |
c5aa993b | 731 | just_seen_right = 0; |
c906108c SS |
732 | } |
733 | return 0; | |
734 | } | |
c5aa993b | 735 | \f |
c906108c | 736 | |
1a4eeb98 | 737 | /* Return a null-terminated temporary copy of the name of a string token. |
c906108c | 738 | |
1a4eeb98 DE |
739 | Tokens that refer to names do so with explicit pointer and length, |
740 | so they can share the storage that lexptr is parsing. | |
741 | When it is necessary to pass a name to a function that expects | |
742 | a null-terminated string, the substring is copied out | |
743 | into a separate block of storage. | |
744 | ||
745 | N.B. A single buffer is reused on each call. */ | |
c906108c SS |
746 | |
747 | char * | |
fba45db2 | 748 | copy_name (struct stoken token) |
c906108c | 749 | { |
1a4eeb98 DE |
750 | /* A temporary buffer for identifiers, so we can null-terminate them. |
751 | We allocate this with xrealloc. parse_exp_1 used to allocate with | |
752 | alloca, using the size of the whole expression as a conservative | |
753 | estimate of the space needed. However, macro expansion can | |
754 | introduce names longer than the original expression; there's no | |
755 | practical way to know beforehand how large that might be. */ | |
756 | static char *namecopy; | |
757 | static size_t namecopy_size; | |
758 | ||
3a913e29 JB |
759 | /* Make sure there's enough space for the token. */ |
760 | if (namecopy_size < token.length + 1) | |
761 | { | |
762 | namecopy_size = token.length + 1; | |
763 | namecopy = xrealloc (namecopy, token.length + 1); | |
764 | } | |
765 | ||
c906108c SS |
766 | memcpy (namecopy, token.ptr, token.length); |
767 | namecopy[token.length] = 0; | |
3a913e29 | 768 | |
c906108c SS |
769 | return namecopy; |
770 | } | |
771 | \f | |
772 | /* Reverse an expression from suffix form (in which it is constructed) | |
65d12d83 TT |
773 | to prefix form (in which we can conveniently print or execute it). |
774 | Ordinarily this always returns -1. However, if EXPOUT_LAST_STRUCT | |
775 | is not -1 (i.e., we are trying to complete a field name), it will | |
776 | return the index of the subexpression which is the left-hand-side | |
777 | of the struct operation at EXPOUT_LAST_STRUCT. */ | |
c906108c | 778 | |
65d12d83 | 779 | static int |
f86f5ca3 | 780 | prefixify_expression (struct expression *expr) |
c906108c | 781 | { |
df2a60d0 | 782 | int len = sizeof (struct expression) + EXP_ELEM_TO_BYTES (expr->nelts); |
f86f5ca3 PH |
783 | struct expression *temp; |
784 | int inpos = expr->nelts, outpos = 0; | |
c906108c SS |
785 | |
786 | temp = (struct expression *) alloca (len); | |
787 | ||
788 | /* Copy the original expression into temp. */ | |
789 | memcpy (temp, expr, len); | |
790 | ||
65d12d83 | 791 | return prefixify_subexp (temp, expr, inpos, outpos); |
c906108c SS |
792 | } |
793 | ||
24daaebc PH |
794 | /* Return the number of exp_elements in the postfix subexpression |
795 | of EXPR whose operator is at index ENDPOS - 1 in EXPR. */ | |
c906108c SS |
796 | |
797 | int | |
f86f5ca3 | 798 | length_of_subexp (struct expression *expr, int endpos) |
24daaebc | 799 | { |
6b4398f7 | 800 | int oplen, args; |
24daaebc PH |
801 | |
802 | operator_length (expr, endpos, &oplen, &args); | |
803 | ||
804 | while (args > 0) | |
805 | { | |
806 | oplen += length_of_subexp (expr, endpos - oplen); | |
807 | args--; | |
808 | } | |
809 | ||
810 | return oplen; | |
811 | } | |
812 | ||
813 | /* Sets *OPLENP to the length of the operator whose (last) index is | |
814 | ENDPOS - 1 in EXPR, and sets *ARGSP to the number of arguments that | |
815 | operator takes. */ | |
816 | ||
817 | void | |
554794dc SDJ |
818 | operator_length (const struct expression *expr, int endpos, int *oplenp, |
819 | int *argsp) | |
5f9769d1 PH |
820 | { |
821 | expr->language_defn->la_exp_desc->operator_length (expr, endpos, | |
822 | oplenp, argsp); | |
823 | } | |
824 | ||
825 | /* Default value for operator_length in exp_descriptor vectors. */ | |
826 | ||
827 | void | |
554794dc | 828 | operator_length_standard (const struct expression *expr, int endpos, |
5f9769d1 | 829 | int *oplenp, int *argsp) |
c906108c | 830 | { |
f86f5ca3 PH |
831 | int oplen = 1; |
832 | int args = 0; | |
0b4e1325 | 833 | enum f90_range_type range_type; |
f86f5ca3 | 834 | int i; |
c906108c SS |
835 | |
836 | if (endpos < 1) | |
8a3fe4f8 | 837 | error (_("?error in operator_length_standard")); |
c906108c SS |
838 | |
839 | i = (int) expr->elts[endpos - 1].opcode; | |
840 | ||
841 | switch (i) | |
842 | { | |
843 | /* C++ */ | |
844 | case OP_SCOPE: | |
845 | oplen = longest_to_int (expr->elts[endpos - 2].longconst); | |
846 | oplen = 5 + BYTES_TO_EXP_ELEM (oplen + 1); | |
847 | break; | |
848 | ||
849 | case OP_LONG: | |
850 | case OP_DOUBLE: | |
27bc4d80 | 851 | case OP_DECFLOAT: |
c906108c SS |
852 | case OP_VAR_VALUE: |
853 | oplen = 4; | |
854 | break; | |
855 | ||
856 | case OP_TYPE: | |
857 | case OP_BOOL: | |
858 | case OP_LAST: | |
c906108c | 859 | case OP_INTERNALVAR: |
36b11add | 860 | case OP_VAR_ENTRY_VALUE: |
c906108c SS |
861 | oplen = 3; |
862 | break; | |
863 | ||
864 | case OP_COMPLEX: | |
c806c55a | 865 | oplen = 3; |
c906108c | 866 | args = 2; |
c5aa993b | 867 | break; |
c906108c SS |
868 | |
869 | case OP_FUNCALL: | |
870 | case OP_F77_UNDETERMINED_ARGLIST: | |
871 | oplen = 3; | |
872 | args = 1 + longest_to_int (expr->elts[endpos - 2].longconst); | |
873 | break; | |
874 | ||
072bba3b KS |
875 | case TYPE_INSTANCE: |
876 | oplen = 4 + longest_to_int (expr->elts[endpos - 2].longconst); | |
877 | args = 1; | |
878 | break; | |
879 | ||
0df8b418 | 880 | case OP_OBJC_MSGCALL: /* Objective C message (method) call. */ |
53c551b7 AF |
881 | oplen = 4; |
882 | args = 1 + longest_to_int (expr->elts[endpos - 2].longconst); | |
883 | break; | |
884 | ||
c906108c SS |
885 | case UNOP_MAX: |
886 | case UNOP_MIN: | |
887 | oplen = 3; | |
888 | break; | |
889 | ||
c5aa993b JM |
890 | case BINOP_VAL: |
891 | case UNOP_CAST: | |
4e8f195d TT |
892 | case UNOP_DYNAMIC_CAST: |
893 | case UNOP_REINTERPRET_CAST: | |
c5aa993b | 894 | case UNOP_MEMVAL: |
c906108c SS |
895 | oplen = 3; |
896 | args = 1; | |
897 | break; | |
898 | ||
9e35dae4 DJ |
899 | case UNOP_MEMVAL_TLS: |
900 | oplen = 4; | |
901 | args = 1; | |
902 | break; | |
903 | ||
c906108c SS |
904 | case UNOP_ABS: |
905 | case UNOP_CAP: | |
906 | case UNOP_CHR: | |
907 | case UNOP_FLOAT: | |
908 | case UNOP_HIGH: | |
909 | case UNOP_ODD: | |
910 | case UNOP_ORD: | |
911 | case UNOP_TRUNC: | |
912 | oplen = 1; | |
913 | args = 1; | |
914 | break; | |
915 | ||
7322dca9 SW |
916 | case OP_ADL_FUNC: |
917 | oplen = longest_to_int (expr->elts[endpos - 2].longconst); | |
918 | oplen = 4 + BYTES_TO_EXP_ELEM (oplen + 1); | |
919 | oplen++; | |
920 | oplen++; | |
921 | break; | |
922 | ||
c906108c SS |
923 | case OP_LABELED: |
924 | case STRUCTOP_STRUCT: | |
925 | case STRUCTOP_PTR: | |
926 | args = 1; | |
927 | /* fall through */ | |
67f3407f | 928 | case OP_REGISTER: |
c906108c SS |
929 | case OP_M2_STRING: |
930 | case OP_STRING: | |
3e43a32a | 931 | case OP_OBJC_NSSTRING: /* Objective C Foundation Class |
0df8b418 MS |
932 | NSString constant. */ |
933 | case OP_OBJC_SELECTOR: /* Objective C "@selector" pseudo-op. */ | |
c906108c | 934 | case OP_NAME: |
c906108c SS |
935 | oplen = longest_to_int (expr->elts[endpos - 2].longconst); |
936 | oplen = 4 + BYTES_TO_EXP_ELEM (oplen + 1); | |
937 | break; | |
938 | ||
939 | case OP_BITSTRING: | |
940 | oplen = longest_to_int (expr->elts[endpos - 2].longconst); | |
941 | oplen = (oplen + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; | |
942 | oplen = 4 + BYTES_TO_EXP_ELEM (oplen); | |
943 | break; | |
944 | ||
945 | case OP_ARRAY: | |
946 | oplen = 4; | |
947 | args = longest_to_int (expr->elts[endpos - 2].longconst); | |
948 | args -= longest_to_int (expr->elts[endpos - 3].longconst); | |
949 | args += 1; | |
950 | break; | |
951 | ||
952 | case TERNOP_COND: | |
953 | case TERNOP_SLICE: | |
954 | case TERNOP_SLICE_COUNT: | |
955 | args = 3; | |
956 | break; | |
957 | ||
958 | /* Modula-2 */ | |
c5aa993b | 959 | case MULTI_SUBSCRIPT: |
c906108c | 960 | oplen = 3; |
c5aa993b | 961 | args = 1 + longest_to_int (expr->elts[endpos - 2].longconst); |
c906108c SS |
962 | break; |
963 | ||
964 | case BINOP_ASSIGN_MODIFY: | |
965 | oplen = 3; | |
966 | args = 2; | |
967 | break; | |
968 | ||
969 | /* C++ */ | |
970 | case OP_THIS: | |
971 | oplen = 2; | |
972 | break; | |
973 | ||
0b4e1325 WZ |
974 | case OP_F90_RANGE: |
975 | oplen = 3; | |
976 | ||
977 | range_type = longest_to_int (expr->elts[endpos - 2].longconst); | |
978 | switch (range_type) | |
979 | { | |
980 | case LOW_BOUND_DEFAULT: | |
981 | case HIGH_BOUND_DEFAULT: | |
982 | args = 1; | |
983 | break; | |
984 | case BOTH_BOUND_DEFAULT: | |
985 | args = 0; | |
986 | break; | |
987 | case NONE_BOUND_DEFAULT: | |
988 | args = 2; | |
989 | break; | |
990 | } | |
991 | ||
992 | break; | |
993 | ||
c906108c SS |
994 | default: |
995 | args = 1 + (i < (int) BINOP_END); | |
996 | } | |
997 | ||
24daaebc PH |
998 | *oplenp = oplen; |
999 | *argsp = args; | |
c906108c SS |
1000 | } |
1001 | ||
1002 | /* Copy the subexpression ending just before index INEND in INEXPR | |
1003 | into OUTEXPR, starting at index OUTBEG. | |
65d12d83 TT |
1004 | In the process, convert it from suffix to prefix form. |
1005 | If EXPOUT_LAST_STRUCT is -1, then this function always returns -1. | |
1006 | Otherwise, it returns the index of the subexpression which is the | |
1007 | left-hand-side of the expression at EXPOUT_LAST_STRUCT. */ | |
c906108c | 1008 | |
65d12d83 | 1009 | static int |
f86f5ca3 PH |
1010 | prefixify_subexp (struct expression *inexpr, |
1011 | struct expression *outexpr, int inend, int outbeg) | |
c906108c | 1012 | { |
24daaebc PH |
1013 | int oplen; |
1014 | int args; | |
f86f5ca3 | 1015 | int i; |
c906108c | 1016 | int *arglens; |
65d12d83 | 1017 | int result = -1; |
c906108c | 1018 | |
24daaebc | 1019 | operator_length (inexpr, inend, &oplen, &args); |
c906108c SS |
1020 | |
1021 | /* Copy the final operator itself, from the end of the input | |
1022 | to the beginning of the output. */ | |
1023 | inend -= oplen; | |
1024 | memcpy (&outexpr->elts[outbeg], &inexpr->elts[inend], | |
1025 | EXP_ELEM_TO_BYTES (oplen)); | |
1026 | outbeg += oplen; | |
1027 | ||
65d12d83 TT |
1028 | if (expout_last_struct == inend) |
1029 | result = outbeg - oplen; | |
1030 | ||
c906108c SS |
1031 | /* Find the lengths of the arg subexpressions. */ |
1032 | arglens = (int *) alloca (args * sizeof (int)); | |
1033 | for (i = args - 1; i >= 0; i--) | |
1034 | { | |
1035 | oplen = length_of_subexp (inexpr, inend); | |
1036 | arglens[i] = oplen; | |
1037 | inend -= oplen; | |
1038 | } | |
1039 | ||
1040 | /* Now copy each subexpression, preserving the order of | |
1041 | the subexpressions, but prefixifying each one. | |
1042 | In this loop, inend starts at the beginning of | |
1043 | the expression this level is working on | |
1044 | and marches forward over the arguments. | |
1045 | outbeg does similarly in the output. */ | |
1046 | for (i = 0; i < args; i++) | |
1047 | { | |
65d12d83 | 1048 | int r; |
ad3bbd48 | 1049 | |
c906108c SS |
1050 | oplen = arglens[i]; |
1051 | inend += oplen; | |
65d12d83 TT |
1052 | r = prefixify_subexp (inexpr, outexpr, inend, outbeg); |
1053 | if (r != -1) | |
1054 | { | |
1055 | /* Return immediately. We probably have only parsed a | |
1056 | partial expression, so we don't want to try to reverse | |
1057 | the other operands. */ | |
1058 | return r; | |
1059 | } | |
c906108c SS |
1060 | outbeg += oplen; |
1061 | } | |
65d12d83 TT |
1062 | |
1063 | return result; | |
c906108c SS |
1064 | } |
1065 | \f | |
c906108c | 1066 | /* Read an expression from the string *STRINGPTR points to, |
ae0c443d | 1067 | parse it, and return a pointer to a struct expression that we malloc. |
c906108c SS |
1068 | Use block BLOCK as the lexical context for variable names; |
1069 | if BLOCK is zero, use the block of the selected stack frame. | |
1070 | Meanwhile, advance *STRINGPTR to point after the expression, | |
1071 | at the first nonwhite character that is not part of the expression | |
1072 | (possibly a null character). | |
1073 | ||
1074 | If COMMA is nonzero, stop if a comma is reached. */ | |
1075 | ||
1076 | struct expression * | |
fba45db2 | 1077 | parse_exp_1 (char **stringptr, struct block *block, int comma) |
e85c3284 | 1078 | { |
65d12d83 | 1079 | return parse_exp_in_context (stringptr, block, comma, 0, NULL); |
e85c3284 PH |
1080 | } |
1081 | ||
1082 | /* As for parse_exp_1, except that if VOID_CONTEXT_P, then | |
65d12d83 TT |
1083 | no value is expected from the expression. |
1084 | OUT_SUBEXP is set when attempting to complete a field name; in this | |
1085 | case it is set to the index of the subexpression on the | |
1086 | left-hand-side of the struct op. If not doing such completion, it | |
1087 | is left untouched. */ | |
e85c3284 PH |
1088 | |
1089 | static struct expression * | |
1090 | parse_exp_in_context (char **stringptr, struct block *block, int comma, | |
65d12d83 | 1091 | int void_context_p, int *out_subexp) |
c906108c | 1092 | { |
65d12d83 | 1093 | volatile struct gdb_exception except; |
c906108c | 1094 | struct cleanup *old_chain; |
0cce5bd9 | 1095 | const struct language_defn *lang = NULL; |
65d12d83 | 1096 | int subexp; |
c906108c SS |
1097 | |
1098 | lexptr = *stringptr; | |
665132f9 | 1099 | prev_lexptr = NULL; |
c906108c SS |
1100 | |
1101 | paren_depth = 0; | |
1102 | type_stack_depth = 0; | |
65d12d83 | 1103 | expout_last_struct = -1; |
c906108c SS |
1104 | |
1105 | comma_terminates = comma; | |
1106 | ||
1107 | if (lexptr == 0 || *lexptr == 0) | |
e2e0b3e5 | 1108 | error_no_arg (_("expression to compute")); |
c906108c | 1109 | |
74b7792f | 1110 | old_chain = make_cleanup (free_funcalls, 0 /*ignore*/); |
c906108c SS |
1111 | funcall_chain = 0; |
1112 | ||
d705c43c | 1113 | expression_context_block = block; |
59f92a09 | 1114 | |
d705c43c PA |
1115 | /* If no context specified, try using the current frame, if any. */ |
1116 | if (!expression_context_block) | |
1117 | expression_context_block = get_selected_block (&expression_context_pc); | |
1118 | else | |
1119 | expression_context_pc = BLOCK_START (expression_context_block); | |
59f92a09 | 1120 | |
d705c43c | 1121 | /* Fall back to using the current source static context, if any. */ |
59f92a09 | 1122 | |
d705c43c | 1123 | if (!expression_context_block) |
59f92a09 FF |
1124 | { |
1125 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
1126 | if (cursal.symtab) | |
d705c43c PA |
1127 | expression_context_block |
1128 | = BLOCKVECTOR_BLOCK (BLOCKVECTOR (cursal.symtab), STATIC_BLOCK); | |
1129 | if (expression_context_block) | |
1130 | expression_context_pc = BLOCK_START (expression_context_block); | |
84f0252a | 1131 | } |
c906108c | 1132 | |
0cce5bd9 JB |
1133 | if (language_mode == language_mode_auto && block != NULL) |
1134 | { | |
1135 | /* Find the language associated to the given context block. | |
1136 | Default to the current language if it can not be determined. | |
1137 | ||
1138 | Note that using the language corresponding to the current frame | |
1139 | can sometimes give unexpected results. For instance, this | |
1140 | routine is often called several times during the inferior | |
1141 | startup phase to re-parse breakpoint expressions after | |
1142 | a new shared library has been loaded. The language associated | |
1143 | to the current frame at this moment is not relevant for | |
0df8b418 | 1144 | the breakpoint. Using it would therefore be silly, so it seems |
0cce5bd9 | 1145 | better to rely on the current language rather than relying on |
0df8b418 | 1146 | the current frame language to parse the expression. That's why |
0cce5bd9 JB |
1147 | we do the following language detection only if the context block |
1148 | has been specifically provided. */ | |
1149 | struct symbol *func = block_linkage_function (block); | |
1150 | ||
1151 | if (func != NULL) | |
1152 | lang = language_def (SYMBOL_LANGUAGE (func)); | |
1153 | if (lang == NULL || lang->la_language == language_unknown) | |
1154 | lang = current_language; | |
1155 | } | |
1156 | else | |
1157 | lang = current_language; | |
1158 | ||
c906108c SS |
1159 | expout_size = 10; |
1160 | expout_ptr = 0; | |
1161 | expout = (struct expression *) | |
1162 | xmalloc (sizeof (struct expression) + EXP_ELEM_TO_BYTES (expout_size)); | |
0cce5bd9 | 1163 | expout->language_defn = lang; |
e17c207e | 1164 | expout->gdbarch = get_current_arch (); |
c906108c | 1165 | |
65d12d83 TT |
1166 | TRY_CATCH (except, RETURN_MASK_ALL) |
1167 | { | |
0cce5bd9 JB |
1168 | if (lang->la_parser ()) |
1169 | lang->la_error (NULL); | |
65d12d83 TT |
1170 | } |
1171 | if (except.reason < 0) | |
1172 | { | |
1173 | if (! in_parse_field) | |
1174 | { | |
1175 | xfree (expout); | |
1176 | throw_exception (except); | |
1177 | } | |
1178 | } | |
c906108c SS |
1179 | |
1180 | discard_cleanups (old_chain); | |
1181 | ||
1182 | /* Record the actual number of expression elements, and then | |
1183 | reallocate the expression memory so that we free up any | |
0df8b418 | 1184 | excess elements. */ |
c906108c SS |
1185 | |
1186 | expout->nelts = expout_ptr; | |
1187 | expout = (struct expression *) | |
1188 | xrealloc ((char *) expout, | |
82ae4854 | 1189 | sizeof (struct expression) + EXP_ELEM_TO_BYTES (expout_ptr)); |
c906108c SS |
1190 | |
1191 | /* Convert expression from postfix form as generated by yacc | |
0df8b418 | 1192 | parser, to a prefix form. */ |
c906108c | 1193 | |
c906108c | 1194 | if (expressiondebug) |
24daaebc PH |
1195 | dump_raw_expression (expout, gdb_stdlog, |
1196 | "before conversion to prefix form"); | |
c906108c | 1197 | |
65d12d83 TT |
1198 | subexp = prefixify_expression (expout); |
1199 | if (out_subexp) | |
1200 | *out_subexp = subexp; | |
c906108c | 1201 | |
0cce5bd9 | 1202 | lang->la_post_parser (&expout, void_context_p); |
e85c3284 | 1203 | |
c906108c | 1204 | if (expressiondebug) |
24daaebc | 1205 | dump_prefix_expression (expout, gdb_stdlog); |
c906108c SS |
1206 | |
1207 | *stringptr = lexptr; | |
1208 | return expout; | |
1209 | } | |
1210 | ||
1211 | /* Parse STRING as an expression, and complain if this fails | |
1212 | to use up all of the contents of STRING. */ | |
1213 | ||
1214 | struct expression * | |
fba45db2 | 1215 | parse_expression (char *string) |
c906108c | 1216 | { |
f86f5ca3 | 1217 | struct expression *exp; |
ad3bbd48 | 1218 | |
c906108c SS |
1219 | exp = parse_exp_1 (&string, 0, 0); |
1220 | if (*string) | |
8a3fe4f8 | 1221 | error (_("Junk after end of expression.")); |
c906108c SS |
1222 | return exp; |
1223 | } | |
e85c3284 | 1224 | |
65d12d83 TT |
1225 | /* Parse STRING as an expression. If parsing ends in the middle of a |
1226 | field reference, return the type of the left-hand-side of the | |
1227 | reference; furthermore, if the parsing ends in the field name, | |
c92817ce TT |
1228 | return the field name in *NAME. If the parsing ends in the middle |
1229 | of a field reference, but the reference is somehow invalid, throw | |
1230 | an exception. In all other cases, return NULL. Returned non-NULL | |
1231 | *NAME must be freed by the caller. */ | |
65d12d83 TT |
1232 | |
1233 | struct type * | |
1234 | parse_field_expression (char *string, char **name) | |
1235 | { | |
1236 | struct expression *exp = NULL; | |
1237 | struct value *val; | |
1238 | int subexp; | |
1239 | volatile struct gdb_exception except; | |
1240 | ||
c92817ce | 1241 | TRY_CATCH (except, RETURN_MASK_ERROR) |
65d12d83 TT |
1242 | { |
1243 | in_parse_field = 1; | |
1244 | exp = parse_exp_in_context (&string, 0, 0, 0, &subexp); | |
1245 | } | |
1246 | in_parse_field = 0; | |
1247 | if (except.reason < 0 || ! exp) | |
1248 | return NULL; | |
1249 | if (expout_last_struct == -1) | |
1250 | { | |
1251 | xfree (exp); | |
1252 | return NULL; | |
1253 | } | |
1254 | ||
1255 | *name = extract_field_op (exp, &subexp); | |
1256 | if (!*name) | |
1257 | { | |
1258 | xfree (exp); | |
1259 | return NULL; | |
1260 | } | |
a0b7aece | 1261 | |
c92817ce TT |
1262 | /* This might throw an exception. If so, we want to let it |
1263 | propagate. */ | |
65d12d83 | 1264 | val = evaluate_subexpression_type (exp, subexp); |
c92817ce TT |
1265 | /* (*NAME) is a part of the EXP memory block freed below. */ |
1266 | *name = xstrdup (*name); | |
65d12d83 TT |
1267 | xfree (exp); |
1268 | ||
1269 | return value_type (val); | |
1270 | } | |
1271 | ||
0df8b418 | 1272 | /* A post-parser that does nothing. */ |
e85c3284 | 1273 | |
e85c3284 PH |
1274 | void |
1275 | null_post_parser (struct expression **exp, int void_context_p) | |
1276 | { | |
1277 | } | |
d30f5e1f DE |
1278 | |
1279 | /* Parse floating point value P of length LEN. | |
1280 | Return 0 (false) if invalid, 1 (true) if valid. | |
1281 | The successfully parsed number is stored in D. | |
1282 | *SUFFIX points to the suffix of the number in P. | |
1283 | ||
1284 | NOTE: This accepts the floating point syntax that sscanf accepts. */ | |
1285 | ||
1286 | int | |
1287 | parse_float (const char *p, int len, DOUBLEST *d, const char **suffix) | |
1288 | { | |
1289 | char *copy; | |
1290 | char *s; | |
1291 | int n, num; | |
1292 | ||
1293 | copy = xmalloc (len + 1); | |
1294 | memcpy (copy, p, len); | |
1295 | copy[len] = 0; | |
1296 | ||
1297 | num = sscanf (copy, "%" DOUBLEST_SCAN_FORMAT "%n", d, &n); | |
1298 | xfree (copy); | |
1299 | ||
1300 | /* The sscanf man page suggests not making any assumptions on the effect | |
1301 | of %n on the result, so we don't. | |
1302 | That is why we simply test num == 0. */ | |
1303 | if (num == 0) | |
1304 | return 0; | |
1305 | ||
1306 | *suffix = p + n; | |
1307 | return 1; | |
1308 | } | |
1309 | ||
1310 | /* Parse floating point value P of length LEN, using the C syntax for floats. | |
1311 | Return 0 (false) if invalid, 1 (true) if valid. | |
1312 | The successfully parsed number is stored in *D. | |
1313 | Its type is taken from builtin_type (gdbarch) and is stored in *T. */ | |
1314 | ||
1315 | int | |
1316 | parse_c_float (struct gdbarch *gdbarch, const char *p, int len, | |
1317 | DOUBLEST *d, struct type **t) | |
1318 | { | |
1319 | const char *suffix; | |
1320 | int suffix_len; | |
1321 | const struct builtin_type *builtin_types = builtin_type (gdbarch); | |
1322 | ||
1323 | if (! parse_float (p, len, d, &suffix)) | |
1324 | return 0; | |
1325 | ||
1326 | suffix_len = p + len - suffix; | |
1327 | ||
1328 | if (suffix_len == 0) | |
1329 | *t = builtin_types->builtin_double; | |
1330 | else if (suffix_len == 1) | |
1331 | { | |
1332 | /* Handle suffixes: 'f' for float, 'l' for long double. */ | |
1333 | if (tolower (*suffix) == 'f') | |
1334 | *t = builtin_types->builtin_float; | |
1335 | else if (tolower (*suffix) == 'l') | |
1336 | *t = builtin_types->builtin_long_double; | |
1337 | else | |
1338 | return 0; | |
1339 | } | |
1340 | else | |
1341 | return 0; | |
1342 | ||
1343 | return 1; | |
1344 | } | |
c906108c SS |
1345 | \f |
1346 | /* Stuff for maintaining a stack of types. Currently just used by C, but | |
1347 | probably useful for any language which declares its types "backwards". */ | |
1348 | ||
47663de5 MS |
1349 | static void |
1350 | check_type_stack_depth (void) | |
c906108c SS |
1351 | { |
1352 | if (type_stack_depth == type_stack_size) | |
1353 | { | |
1354 | type_stack_size *= 2; | |
1355 | type_stack = (union type_stack_elt *) | |
1356 | xrealloc ((char *) type_stack, type_stack_size * sizeof (*type_stack)); | |
1357 | } | |
47663de5 MS |
1358 | } |
1359 | ||
1360 | void | |
1361 | push_type (enum type_pieces tp) | |
1362 | { | |
1363 | check_type_stack_depth (); | |
c906108c SS |
1364 | type_stack[type_stack_depth++].piece = tp; |
1365 | } | |
1366 | ||
1367 | void | |
fba45db2 | 1368 | push_type_int (int n) |
c906108c | 1369 | { |
47663de5 | 1370 | check_type_stack_depth (); |
c906108c SS |
1371 | type_stack[type_stack_depth++].int_val = n; |
1372 | } | |
1373 | ||
47663de5 MS |
1374 | void |
1375 | push_type_address_space (char *string) | |
1376 | { | |
50810684 | 1377 | push_type_int (address_space_name_to_int (parse_gdbarch, string)); |
47663de5 MS |
1378 | } |
1379 | ||
c5aa993b | 1380 | enum type_pieces |
fba45db2 | 1381 | pop_type (void) |
c906108c SS |
1382 | { |
1383 | if (type_stack_depth) | |
1384 | return type_stack[--type_stack_depth].piece; | |
1385 | return tp_end; | |
1386 | } | |
1387 | ||
1388 | int | |
fba45db2 | 1389 | pop_type_int (void) |
c906108c SS |
1390 | { |
1391 | if (type_stack_depth) | |
1392 | return type_stack[--type_stack_depth].int_val; | |
1393 | /* "Can't happen". */ | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | /* Pop the type stack and return the type which corresponds to FOLLOW_TYPE | |
1398 | as modified by all the stuff on the stack. */ | |
1399 | struct type * | |
fba45db2 | 1400 | follow_types (struct type *follow_type) |
c906108c SS |
1401 | { |
1402 | int done = 0; | |
2e2394a0 MS |
1403 | int make_const = 0; |
1404 | int make_volatile = 0; | |
47663de5 | 1405 | int make_addr_space = 0; |
c906108c | 1406 | int array_size; |
c906108c SS |
1407 | |
1408 | while (!done) | |
1409 | switch (pop_type ()) | |
1410 | { | |
1411 | case tp_end: | |
1412 | done = 1; | |
2e2394a0 MS |
1413 | if (make_const) |
1414 | follow_type = make_cv_type (make_const, | |
1415 | TYPE_VOLATILE (follow_type), | |
1416 | follow_type, 0); | |
1417 | if (make_volatile) | |
1418 | follow_type = make_cv_type (TYPE_CONST (follow_type), | |
1419 | make_volatile, | |
1420 | follow_type, 0); | |
47663de5 MS |
1421 | if (make_addr_space) |
1422 | follow_type = make_type_with_address_space (follow_type, | |
1423 | make_addr_space); | |
1424 | make_const = make_volatile = 0; | |
1425 | make_addr_space = 0; | |
2e2394a0 MS |
1426 | break; |
1427 | case tp_const: | |
1428 | make_const = 1; | |
1429 | break; | |
1430 | case tp_volatile: | |
1431 | make_volatile = 1; | |
c906108c | 1432 | break; |
47663de5 MS |
1433 | case tp_space_identifier: |
1434 | make_addr_space = pop_type_int (); | |
1435 | break; | |
c906108c SS |
1436 | case tp_pointer: |
1437 | follow_type = lookup_pointer_type (follow_type); | |
2e2394a0 MS |
1438 | if (make_const) |
1439 | follow_type = make_cv_type (make_const, | |
1440 | TYPE_VOLATILE (follow_type), | |
1441 | follow_type, 0); | |
1442 | if (make_volatile) | |
1443 | follow_type = make_cv_type (TYPE_CONST (follow_type), | |
1444 | make_volatile, | |
1445 | follow_type, 0); | |
47663de5 MS |
1446 | if (make_addr_space) |
1447 | follow_type = make_type_with_address_space (follow_type, | |
1448 | make_addr_space); | |
2e2394a0 | 1449 | make_const = make_volatile = 0; |
47663de5 | 1450 | make_addr_space = 0; |
c906108c SS |
1451 | break; |
1452 | case tp_reference: | |
1453 | follow_type = lookup_reference_type (follow_type); | |
2e2394a0 | 1454 | if (make_const) |
47663de5 MS |
1455 | follow_type = make_cv_type (make_const, |
1456 | TYPE_VOLATILE (follow_type), | |
1457 | follow_type, 0); | |
2e2394a0 | 1458 | if (make_volatile) |
47663de5 MS |
1459 | follow_type = make_cv_type (TYPE_CONST (follow_type), |
1460 | make_volatile, | |
1461 | follow_type, 0); | |
1462 | if (make_addr_space) | |
1463 | follow_type = make_type_with_address_space (follow_type, | |
1464 | make_addr_space); | |
2e2394a0 | 1465 | make_const = make_volatile = 0; |
47663de5 | 1466 | make_addr_space = 0; |
c906108c SS |
1467 | break; |
1468 | case tp_array: | |
1469 | array_size = pop_type_int (); | |
1470 | /* FIXME-type-allocation: need a way to free this type when we are | |
1471 | done with it. */ | |
c906108c | 1472 | follow_type = |
e3506a9f UW |
1473 | lookup_array_range_type (follow_type, |
1474 | 0, array_size >= 0 ? array_size - 1 : 0); | |
c906108c | 1475 | if (array_size < 0) |
d78df370 | 1476 | TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (follow_type) = 1; |
c906108c SS |
1477 | break; |
1478 | case tp_function: | |
1479 | /* FIXME-type-allocation: need a way to free this type when we are | |
1480 | done with it. */ | |
1481 | follow_type = lookup_function_type (follow_type); | |
1482 | break; | |
1483 | } | |
1484 | return follow_type; | |
1485 | } | |
1486 | \f | |
f461f5cf PM |
1487 | /* This function avoids direct calls to fprintf |
1488 | in the parser generated debug code. */ | |
1489 | void | |
1490 | parser_fprintf (FILE *x, const char *y, ...) | |
1491 | { | |
1492 | va_list args; | |
ad3bbd48 | 1493 | |
f461f5cf PM |
1494 | va_start (args, y); |
1495 | if (x == stderr) | |
1496 | vfprintf_unfiltered (gdb_stderr, y, args); | |
1497 | else | |
1498 | { | |
1499 | fprintf_unfiltered (gdb_stderr, " Unknown FILE used.\n"); | |
1500 | vfprintf_unfiltered (gdb_stderr, y, args); | |
1501 | } | |
1502 | va_end (args); | |
1503 | } | |
1504 | ||
c0201579 JK |
1505 | /* Implementation of the exp_descriptor method operator_check. */ |
1506 | ||
1507 | int | |
1508 | operator_check_standard (struct expression *exp, int pos, | |
1509 | int (*objfile_func) (struct objfile *objfile, | |
1510 | void *data), | |
1511 | void *data) | |
1512 | { | |
1513 | const union exp_element *const elts = exp->elts; | |
1514 | struct type *type = NULL; | |
1515 | struct objfile *objfile = NULL; | |
1516 | ||
1517 | /* Extended operators should have been already handled by exp_descriptor | |
1518 | iterate method of its specific language. */ | |
1519 | gdb_assert (elts[pos].opcode < OP_EXTENDED0); | |
1520 | ||
1521 | /* Track the callers of write_exp_elt_type for this table. */ | |
1522 | ||
1523 | switch (elts[pos].opcode) | |
1524 | { | |
1525 | case BINOP_VAL: | |
1526 | case OP_COMPLEX: | |
1527 | case OP_DECFLOAT: | |
1528 | case OP_DOUBLE: | |
1529 | case OP_LONG: | |
1530 | case OP_SCOPE: | |
1531 | case OP_TYPE: | |
1532 | case UNOP_CAST: | |
1533 | case UNOP_DYNAMIC_CAST: | |
1534 | case UNOP_REINTERPRET_CAST: | |
1535 | case UNOP_MAX: | |
1536 | case UNOP_MEMVAL: | |
1537 | case UNOP_MIN: | |
1538 | type = elts[pos + 1].type; | |
1539 | break; | |
1540 | ||
1541 | case TYPE_INSTANCE: | |
1542 | { | |
1543 | LONGEST arg, nargs = elts[pos + 1].longconst; | |
1544 | ||
1545 | for (arg = 0; arg < nargs; arg++) | |
1546 | { | |
1547 | struct type *type = elts[pos + 2 + arg].type; | |
1548 | struct objfile *objfile = TYPE_OBJFILE (type); | |
1549 | ||
1550 | if (objfile && (*objfile_func) (objfile, data)) | |
1551 | return 1; | |
1552 | } | |
1553 | } | |
1554 | break; | |
1555 | ||
1556 | case UNOP_MEMVAL_TLS: | |
1557 | objfile = elts[pos + 1].objfile; | |
1558 | type = elts[pos + 2].type; | |
1559 | break; | |
1560 | ||
1561 | case OP_VAR_VALUE: | |
1562 | { | |
1563 | const struct block *const block = elts[pos + 1].block; | |
1564 | const struct symbol *const symbol = elts[pos + 2].symbol; | |
1565 | ||
1566 | /* Check objfile where the variable itself is placed. | |
1567 | SYMBOL_OBJ_SECTION (symbol) may be NULL. */ | |
1568 | if ((*objfile_func) (SYMBOL_SYMTAB (symbol)->objfile, data)) | |
1569 | return 1; | |
1570 | ||
1571 | /* Check objfile where is placed the code touching the variable. */ | |
1572 | objfile = lookup_objfile_from_block (block); | |
1573 | ||
1574 | type = SYMBOL_TYPE (symbol); | |
1575 | } | |
1576 | break; | |
1577 | } | |
1578 | ||
1579 | /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */ | |
1580 | ||
1581 | if (type && TYPE_OBJFILE (type) | |
1582 | && (*objfile_func) (TYPE_OBJFILE (type), data)) | |
1583 | return 1; | |
1584 | if (objfile && (*objfile_func) (objfile, data)) | |
1585 | return 1; | |
1586 | ||
1587 | return 0; | |
1588 | } | |
1589 | ||
1590 | /* Call OBJFILE_FUNC for any TYPE and OBJFILE found being referenced by EXP. | |
1591 | The functions are never called with NULL OBJFILE. Functions get passed an | |
1592 | arbitrary caller supplied DATA pointer. If any of the functions returns | |
1593 | non-zero value then (any other) non-zero value is immediately returned to | |
1594 | the caller. Otherwise zero is returned after iterating through whole EXP. | |
1595 | */ | |
1596 | ||
1597 | static int | |
1598 | exp_iterate (struct expression *exp, | |
1599 | int (*objfile_func) (struct objfile *objfile, void *data), | |
1600 | void *data) | |
1601 | { | |
1602 | int endpos; | |
c0201579 JK |
1603 | |
1604 | for (endpos = exp->nelts; endpos > 0; ) | |
1605 | { | |
1606 | int pos, args, oplen = 0; | |
1607 | ||
dc21167c | 1608 | operator_length (exp, endpos, &oplen, &args); |
c0201579 JK |
1609 | gdb_assert (oplen > 0); |
1610 | ||
1611 | pos = endpos - oplen; | |
1612 | if (exp->language_defn->la_exp_desc->operator_check (exp, pos, | |
1613 | objfile_func, data)) | |
1614 | return 1; | |
1615 | ||
1616 | endpos = pos; | |
1617 | } | |
1618 | ||
1619 | return 0; | |
1620 | } | |
1621 | ||
1622 | /* Helper for exp_uses_objfile. */ | |
1623 | ||
1624 | static int | |
1625 | exp_uses_objfile_iter (struct objfile *exp_objfile, void *objfile_voidp) | |
1626 | { | |
1627 | struct objfile *objfile = objfile_voidp; | |
1628 | ||
1629 | if (exp_objfile->separate_debug_objfile_backlink) | |
1630 | exp_objfile = exp_objfile->separate_debug_objfile_backlink; | |
1631 | ||
1632 | return exp_objfile == objfile; | |
1633 | } | |
1634 | ||
1635 | /* Return 1 if EXP uses OBJFILE (and will become dangling when OBJFILE | |
1636 | is unloaded), otherwise return 0. OBJFILE must not be a separate debug info | |
1637 | file. */ | |
1638 | ||
1639 | int | |
1640 | exp_uses_objfile (struct expression *exp, struct objfile *objfile) | |
1641 | { | |
1642 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
1643 | ||
1644 | return exp_iterate (exp, exp_uses_objfile_iter, objfile); | |
1645 | } | |
1646 | ||
ac9a91a7 | 1647 | void |
fba45db2 | 1648 | _initialize_parse (void) |
ac9a91a7 JM |
1649 | { |
1650 | type_stack_size = 80; | |
1651 | type_stack_depth = 0; | |
1652 | type_stack = (union type_stack_elt *) | |
1653 | xmalloc (type_stack_size * sizeof (*type_stack)); | |
1654 | ||
85c07804 | 1655 | add_setshow_zinteger_cmd ("expression", class_maintenance, |
3e43a32a MS |
1656 | &expressiondebug, |
1657 | _("Set expression debugging."), | |
1658 | _("Show expression debugging."), | |
1659 | _("When non-zero, the internal representation " | |
1660 | "of expressions will be printed."), | |
85c07804 | 1661 | NULL, |
920d2a44 | 1662 | show_expressiondebug, |
85c07804 | 1663 | &setdebuglist, &showdebuglist); |
92981e24 | 1664 | add_setshow_boolean_cmd ("parser", class_maintenance, |
3e43a32a MS |
1665 | &parser_debug, |
1666 | _("Set parser debugging."), | |
1667 | _("Show parser debugging."), | |
1668 | _("When non-zero, expression parser " | |
1669 | "tracing will be enabled."), | |
92981e24 TT |
1670 | NULL, |
1671 | show_parserdebug, | |
1672 | &setdebuglist, &showdebuglist); | |
c906108c | 1673 | } |