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bb2ec1b3 TT |
1 | /* General Compile and inject code |
2 | ||
32d0add0 | 3 | Copyright (C) 2014-2015 Free Software Foundation, Inc. |
bb2ec1b3 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "interps.h" | |
22 | #include "ui-out.h" | |
23 | #include "command.h" | |
24 | #include "cli/cli-script.h" | |
25 | #include "cli/cli-utils.h" | |
26 | #include "completer.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "compile.h" | |
29 | #include "compile-internal.h" | |
30 | #include "compile-object-load.h" | |
31 | #include "compile-object-run.h" | |
32 | #include "language.h" | |
33 | #include "frame.h" | |
34 | #include "source.h" | |
35 | #include "block.h" | |
36 | #include "arch-utils.h" | |
37 | #include "filestuff.h" | |
38 | #include "target.h" | |
39 | #include "osabi.h" | |
40 | ||
41 | \f | |
42 | ||
43 | /* Initial filename for temporary files. */ | |
44 | ||
45 | #define TMP_PREFIX "/tmp/gdbobj-" | |
46 | ||
47 | /* Hold "compile" commands. */ | |
48 | ||
49 | static struct cmd_list_element *compile_command_list; | |
50 | ||
51 | /* Debug flag for "compile" commands. */ | |
52 | ||
53 | int compile_debug; | |
54 | ||
55 | /* Implement "show debug compile". */ | |
56 | ||
57 | static void | |
58 | show_compile_debug (struct ui_file *file, int from_tty, | |
59 | struct cmd_list_element *c, const char *value) | |
60 | { | |
61 | fprintf_filtered (file, _("Compile debugging is %s.\n"), value); | |
62 | } | |
63 | ||
64 | \f | |
65 | ||
66 | /* Check *ARG for a "-raw" or "-r" argument. Return 0 if not seen. | |
67 | Return 1 if seen and update *ARG. */ | |
68 | ||
69 | static int | |
70 | check_raw_argument (char **arg) | |
71 | { | |
72 | *arg = skip_spaces (*arg); | |
73 | ||
74 | if (arg != NULL | |
75 | && (check_for_argument (arg, "-raw", sizeof ("-raw") - 1) | |
76 | || check_for_argument (arg, "-r", sizeof ("-r") - 1))) | |
77 | return 1; | |
78 | return 0; | |
79 | } | |
80 | ||
81 | /* Handle the input from the 'compile file' command. The "compile | |
82 | file" command is used to evaluate an expression contained in a file | |
83 | that may contain calls to the GCC compiler. */ | |
84 | ||
85 | static void | |
86 | compile_file_command (char *arg, int from_tty) | |
87 | { | |
88 | enum compile_i_scope_types scope = COMPILE_I_SIMPLE_SCOPE; | |
89 | char *buffer; | |
90 | struct cleanup *cleanup; | |
91 | ||
92 | cleanup = make_cleanup_restore_integer (&interpreter_async); | |
93 | interpreter_async = 0; | |
94 | ||
95 | /* Check the user did not just <enter> after command. */ | |
96 | if (arg == NULL) | |
97 | error (_("You must provide a filename for this command.")); | |
98 | ||
99 | /* Check if a raw (-r|-raw) argument is provided. */ | |
100 | if (arg != NULL && check_raw_argument (&arg)) | |
101 | { | |
102 | scope = COMPILE_I_RAW_SCOPE; | |
103 | arg = skip_spaces (arg); | |
104 | } | |
105 | ||
106 | /* After processing arguments, check there is a filename at the end | |
107 | of the command. */ | |
108 | if (arg[0] == '\0') | |
109 | error (_("You must provide a filename with the raw option set.")); | |
110 | ||
111 | if (arg[0] == '-') | |
112 | error (_("Unknown argument specified.")); | |
113 | ||
114 | arg = skip_spaces (arg); | |
115 | arg = gdb_abspath (arg); | |
116 | make_cleanup (xfree, arg); | |
117 | buffer = xstrprintf ("#include \"%s\"\n", arg); | |
118 | make_cleanup (xfree, buffer); | |
119 | eval_compile_command (NULL, buffer, scope); | |
120 | do_cleanups (cleanup); | |
121 | } | |
122 | ||
123 | /* Handle the input from the 'compile code' command. The | |
124 | "compile code" command is used to evaluate an expression that may | |
125 | contain calls to the GCC compiler. The language expected in this | |
126 | compile command is the language currently set in GDB. */ | |
127 | ||
128 | static void | |
129 | compile_code_command (char *arg, int from_tty) | |
130 | { | |
131 | struct cleanup *cleanup; | |
132 | enum compile_i_scope_types scope = COMPILE_I_SIMPLE_SCOPE; | |
133 | ||
134 | cleanup = make_cleanup_restore_integer (&interpreter_async); | |
135 | interpreter_async = 0; | |
136 | ||
137 | if (arg != NULL && check_raw_argument (&arg)) | |
138 | { | |
139 | scope = COMPILE_I_RAW_SCOPE; | |
140 | arg = skip_spaces (arg); | |
141 | } | |
142 | ||
143 | arg = skip_spaces (arg); | |
144 | ||
145 | if (arg != NULL && !check_for_argument (&arg, "--", sizeof ("--") - 1)) | |
146 | { | |
147 | if (arg[0] == '-') | |
148 | error (_("Unknown argument specified.")); | |
149 | } | |
150 | ||
151 | if (arg && *arg) | |
152 | eval_compile_command (NULL, arg, scope); | |
153 | else | |
154 | { | |
155 | struct command_line *l = get_command_line (compile_control, ""); | |
156 | ||
157 | make_cleanup_free_command_lines (&l); | |
158 | l->control_u.compile.scope = scope; | |
159 | execute_control_command_untraced (l); | |
160 | } | |
161 | ||
162 | do_cleanups (cleanup); | |
163 | } | |
164 | ||
165 | /* A cleanup function to remove a directory and all its contents. */ | |
166 | ||
167 | static void | |
168 | do_rmdir (void *arg) | |
169 | { | |
170 | const char *dir = arg; | |
171 | char *zap; | |
172 | ||
173 | gdb_assert (strncmp (dir, TMP_PREFIX, strlen (TMP_PREFIX)) == 0); | |
174 | zap = concat ("rm -rf ", dir, (char *) NULL); | |
175 | system (zap); | |
176 | } | |
177 | ||
178 | /* Return the name of the temporary directory to use for .o files, and | |
179 | arrange for the directory to be removed at shutdown. */ | |
180 | ||
181 | static const char * | |
182 | get_compile_file_tempdir (void) | |
183 | { | |
184 | static char *tempdir_name; | |
185 | ||
186 | #define TEMPLATE TMP_PREFIX "XXXXXX" | |
187 | char tname[sizeof (TEMPLATE)]; | |
188 | ||
189 | if (tempdir_name != NULL) | |
190 | return tempdir_name; | |
191 | ||
192 | strcpy (tname, TEMPLATE); | |
193 | #undef TEMPLATE | |
1bc1068a | 194 | #ifdef HAVE_MKDTEMP |
bb2ec1b3 | 195 | tempdir_name = mkdtemp (tname); |
1bc1068a JK |
196 | #else |
197 | error (_("Command not supported on this host.")); | |
198 | #endif | |
bb2ec1b3 TT |
199 | if (tempdir_name == NULL) |
200 | perror_with_name (_("Could not make temporary directory")); | |
201 | ||
202 | tempdir_name = xstrdup (tempdir_name); | |
203 | make_final_cleanup (do_rmdir, tempdir_name); | |
204 | return tempdir_name; | |
205 | } | |
206 | ||
207 | /* Compute the names of source and object files to use. The names are | |
208 | allocated by malloc and should be freed by the caller. */ | |
209 | ||
210 | static void | |
211 | get_new_file_names (char **source_file, char **object_file) | |
212 | { | |
213 | static int seq; | |
214 | const char *dir = get_compile_file_tempdir (); | |
215 | ||
216 | ++seq; | |
217 | *source_file = xstrprintf ("%s%sout%d.c", dir, SLASH_STRING, seq); | |
218 | *object_file = xstrprintf ("%s%sout%d.o", dir, SLASH_STRING, seq); | |
219 | } | |
220 | ||
221 | /* Get the block and PC at which to evaluate an expression. */ | |
222 | ||
223 | static const struct block * | |
224 | get_expr_block_and_pc (CORE_ADDR *pc) | |
225 | { | |
226 | const struct block *block = get_selected_block (pc); | |
227 | ||
228 | if (block == NULL) | |
229 | { | |
230 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
231 | ||
232 | if (cursal.symtab) | |
233 | block = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (cursal.symtab), | |
234 | STATIC_BLOCK); | |
235 | if (block != NULL) | |
236 | *pc = BLOCK_START (block); | |
237 | } | |
238 | else | |
239 | *pc = BLOCK_START (block); | |
240 | ||
241 | return block; | |
242 | } | |
243 | ||
244 | /* Call gdb_buildargv, set its result for S into *ARGVP but calculate also the | |
245 | number of parsed arguments into *ARGCP. If gdb_buildargv has returned NULL | |
246 | then *ARGCP is set to zero. */ | |
247 | ||
248 | static void | |
249 | build_argc_argv (const char *s, int *argcp, char ***argvp) | |
250 | { | |
251 | *argvp = gdb_buildargv (s); | |
252 | *argcp = countargv (*argvp); | |
253 | } | |
254 | ||
255 | /* String for 'set compile-args' and 'show compile-args'. */ | |
256 | static char *compile_args; | |
257 | ||
258 | /* Parsed form of COMPILE_ARGS. COMPILE_ARGS_ARGV is NULL terminated. */ | |
259 | static int compile_args_argc; | |
260 | static char **compile_args_argv; | |
261 | ||
262 | /* Implement 'set compile-args'. */ | |
263 | ||
264 | static void | |
265 | set_compile_args (char *args, int from_tty, struct cmd_list_element *c) | |
266 | { | |
267 | freeargv (compile_args_argv); | |
268 | build_argc_argv (compile_args, &compile_args_argc, &compile_args_argv); | |
269 | } | |
270 | ||
271 | /* Implement 'show compile-args'. */ | |
272 | ||
273 | static void | |
274 | show_compile_args (struct ui_file *file, int from_tty, | |
275 | struct cmd_list_element *c, const char *value) | |
276 | { | |
277 | fprintf_filtered (file, _("Compile command command-line arguments " | |
278 | "are \"%s\".\n"), | |
279 | value); | |
280 | } | |
281 | ||
282 | /* Append ARGC and ARGV (as parsed by build_argc_argv) to *ARGCP and *ARGVP. | |
283 | ARGCP+ARGVP can be zero+NULL and also ARGC+ARGV can be zero+NULL. */ | |
284 | ||
285 | static void | |
286 | append_args (int *argcp, char ***argvp, int argc, char **argv) | |
287 | { | |
288 | int argi; | |
289 | ||
290 | *argvp = xrealloc (*argvp, (*argcp + argc + 1) * sizeof (**argvp)); | |
291 | ||
292 | for (argi = 0; argi < argc; argi++) | |
293 | (*argvp)[(*argcp)++] = xstrdup (argv[argi]); | |
294 | (*argvp)[(*argcp)] = NULL; | |
295 | } | |
296 | ||
297 | /* Return DW_AT_producer parsed for get_selected_frame () (if any). | |
298 | Return NULL otherwise. | |
299 | ||
300 | GCC already filters its command-line arguments only for the suitable ones to | |
301 | put into DW_AT_producer - see GCC function gen_producer_string. */ | |
302 | ||
303 | static const char * | |
304 | get_selected_pc_producer_options (void) | |
305 | { | |
306 | CORE_ADDR pc = get_frame_pc (get_selected_frame (NULL)); | |
307 | struct compunit_symtab *symtab = find_pc_compunit_symtab (pc); | |
308 | const char *cs; | |
309 | ||
310 | if (symtab == NULL || symtab->producer == NULL | |
311 | || strncmp (symtab->producer, "GNU ", strlen ("GNU ")) != 0) | |
312 | return NULL; | |
313 | ||
314 | cs = symtab->producer; | |
315 | while (*cs != 0 && *cs != '-') | |
316 | cs = skip_spaces_const (skip_to_space_const (cs)); | |
317 | if (*cs != '-') | |
318 | return NULL; | |
319 | return cs; | |
320 | } | |
321 | ||
322 | /* Produce final vector of GCC compilation options. First element is target | |
323 | size ("-m64", "-m32" etc.), optionally followed by DW_AT_producer options | |
324 | and then compile-args string GDB variable. */ | |
325 | ||
326 | static void | |
327 | get_args (const struct compile_instance *compiler, struct gdbarch *gdbarch, | |
328 | int *argcp, char ***argvp) | |
329 | { | |
330 | const char *cs_producer_options; | |
331 | int argc_compiler; | |
332 | char **argv_compiler; | |
333 | ||
334 | build_argc_argv (gdbarch_gcc_target_options (gdbarch), | |
335 | argcp, argvp); | |
336 | ||
337 | cs_producer_options = get_selected_pc_producer_options (); | |
338 | if (cs_producer_options != NULL) | |
339 | { | |
340 | int argc_producer; | |
341 | char **argv_producer; | |
342 | ||
343 | build_argc_argv (cs_producer_options, &argc_producer, &argv_producer); | |
344 | append_args (argcp, argvp, argc_producer, argv_producer); | |
345 | freeargv (argv_producer); | |
346 | } | |
347 | ||
348 | build_argc_argv (compiler->gcc_target_options, | |
349 | &argc_compiler, &argv_compiler); | |
350 | append_args (argcp, argvp, argc_compiler, argv_compiler); | |
351 | freeargv (argv_compiler); | |
352 | ||
353 | append_args (argcp, argvp, compile_args_argc, compile_args_argv); | |
354 | } | |
355 | ||
356 | /* A cleanup function to destroy a gdb_gcc_instance. */ | |
357 | ||
358 | static void | |
359 | cleanup_compile_instance (void *arg) | |
360 | { | |
361 | struct compile_instance *inst = arg; | |
362 | ||
363 | inst->destroy (inst); | |
364 | } | |
365 | ||
366 | /* A cleanup function to unlink a file. */ | |
367 | ||
368 | static void | |
369 | cleanup_unlink_file (void *arg) | |
370 | { | |
371 | const char *filename = arg; | |
372 | ||
373 | unlink (filename); | |
374 | } | |
375 | ||
376 | /* A helper function suitable for use as the "print_callback" in the | |
377 | compiler object. */ | |
378 | ||
379 | static void | |
380 | print_callback (void *ignore, const char *message) | |
381 | { | |
382 | fputs_filtered (message, gdb_stderr); | |
383 | } | |
384 | ||
385 | /* Process the compilation request. On success it returns the object | |
386 | file name and *SOURCE_FILEP is set to source file name. On an | |
387 | error condition, error () is called. The caller is responsible for | |
388 | freeing both strings. */ | |
389 | ||
390 | static char * | |
391 | compile_to_object (struct command_line *cmd, char *cmd_string, | |
392 | enum compile_i_scope_types scope, | |
393 | char **source_filep) | |
394 | { | |
395 | char *code; | |
396 | char *source_file, *object_file; | |
397 | struct compile_instance *compiler; | |
398 | struct cleanup *cleanup, *inner_cleanup; | |
399 | const struct block *expr_block; | |
400 | CORE_ADDR trash_pc, expr_pc; | |
401 | int argc; | |
402 | char **argv; | |
403 | int ok; | |
404 | FILE *src; | |
405 | struct gdbarch *gdbarch = get_current_arch (); | |
406 | const char *os_rx; | |
407 | const char *arch_rx; | |
408 | char *triplet_rx; | |
409 | char *error_message; | |
410 | ||
411 | if (!target_has_execution) | |
412 | error (_("The program must be running for the compile command to "\ | |
413 | "work.")); | |
414 | ||
415 | expr_block = get_expr_block_and_pc (&trash_pc); | |
416 | expr_pc = get_frame_address_in_block (get_selected_frame (NULL)); | |
417 | ||
418 | /* Set up instance and context for the compiler. */ | |
419 | if (current_language->la_get_compile_instance == NULL) | |
420 | error (_("No compiler support for this language.")); | |
421 | compiler = current_language->la_get_compile_instance (); | |
422 | cleanup = make_cleanup (cleanup_compile_instance, compiler); | |
423 | ||
424 | compiler->fe->ops->set_print_callback (compiler->fe, print_callback, NULL); | |
425 | ||
426 | compiler->scope = scope; | |
427 | compiler->block = expr_block; | |
428 | ||
429 | /* From the provided expression, build a scope to pass to the | |
430 | compiler. */ | |
431 | if (cmd != NULL) | |
432 | { | |
433 | struct ui_file *stream = mem_fileopen (); | |
434 | struct command_line *iter; | |
435 | ||
436 | make_cleanup_ui_file_delete (stream); | |
437 | for (iter = cmd->body_list[0]; iter; iter = iter->next) | |
438 | { | |
439 | fputs_unfiltered (iter->line, stream); | |
440 | fputs_unfiltered ("\n", stream); | |
441 | } | |
442 | ||
443 | code = ui_file_xstrdup (stream, NULL); | |
444 | make_cleanup (xfree, code); | |
445 | } | |
446 | else if (cmd_string != NULL) | |
447 | code = cmd_string; | |
448 | else | |
449 | error (_("Neither a simple expression, or a multi-line specified.")); | |
450 | ||
451 | code = current_language->la_compute_program (compiler, code, gdbarch, | |
452 | expr_block, expr_pc); | |
453 | make_cleanup (xfree, code); | |
454 | if (compile_debug) | |
455 | fprintf_unfiltered (gdb_stdout, "debug output:\n\n%s", code); | |
456 | ||
457 | os_rx = osabi_triplet_regexp (gdbarch_osabi (gdbarch)); | |
458 | arch_rx = gdbarch_gnu_triplet_regexp (gdbarch); | |
459 | triplet_rx = concat (arch_rx, "-[^-]*-", os_rx, (char *) NULL); | |
460 | make_cleanup (xfree, triplet_rx); | |
461 | ||
462 | /* Set compiler command-line arguments. */ | |
463 | get_args (compiler, gdbarch, &argc, &argv); | |
464 | make_cleanup_freeargv (argv); | |
465 | ||
466 | error_message = compiler->fe->ops->set_arguments (compiler->fe, triplet_rx, | |
467 | argc, argv); | |
468 | if (error_message != NULL) | |
469 | { | |
470 | make_cleanup (xfree, error_message); | |
471 | error ("%s", error_message); | |
472 | } | |
473 | ||
474 | if (compile_debug) | |
475 | { | |
476 | int argi; | |
477 | ||
478 | fprintf_unfiltered (gdb_stdout, "Passing %d compiler options:\n", argc); | |
479 | for (argi = 0; argi < argc; argi++) | |
480 | fprintf_unfiltered (gdb_stdout, "Compiler option %d: <%s>\n", | |
481 | argi, argv[argi]); | |
482 | } | |
483 | ||
484 | get_new_file_names (&source_file, &object_file); | |
485 | inner_cleanup = make_cleanup (xfree, source_file); | |
486 | make_cleanup (xfree, object_file); | |
487 | ||
488 | src = gdb_fopen_cloexec (source_file, "w"); | |
489 | if (src == NULL) | |
490 | perror_with_name (_("Could not open source file for writing")); | |
491 | make_cleanup (cleanup_unlink_file, source_file); | |
492 | if (fputs (code, src) == EOF) | |
493 | perror_with_name (_("Could not write to source file")); | |
494 | fclose (src); | |
495 | ||
496 | if (compile_debug) | |
497 | fprintf_unfiltered (gdb_stdout, "source file produced: %s\n\n", | |
498 | source_file); | |
499 | ||
500 | /* Call the compiler and start the compilation process. */ | |
501 | compiler->fe->ops->set_source_file (compiler->fe, source_file); | |
502 | ||
503 | if (!compiler->fe->ops->compile (compiler->fe, object_file, | |
504 | compile_debug)) | |
505 | error (_("Compilation failed.")); | |
506 | ||
507 | if (compile_debug) | |
508 | fprintf_unfiltered (gdb_stdout, "object file produced: %s\n\n", | |
509 | object_file); | |
510 | ||
511 | discard_cleanups (inner_cleanup); | |
512 | do_cleanups (cleanup); | |
513 | *source_filep = source_file; | |
514 | return object_file; | |
515 | } | |
516 | ||
517 | /* The "compile" prefix command. */ | |
518 | ||
519 | static void | |
520 | compile_command (char *args, int from_tty) | |
521 | { | |
522 | /* If a sub-command is not specified to the compile prefix command, | |
523 | assume it is a direct code compilation. */ | |
524 | compile_code_command (args, from_tty); | |
525 | } | |
526 | ||
527 | /* See compile.h. */ | |
528 | ||
529 | void | |
530 | eval_compile_command (struct command_line *cmd, char *cmd_string, | |
531 | enum compile_i_scope_types scope) | |
532 | { | |
533 | char *object_file, *source_file; | |
534 | ||
535 | object_file = compile_to_object (cmd, cmd_string, scope, &source_file); | |
536 | if (object_file != NULL) | |
537 | { | |
538 | struct cleanup *cleanup_xfree, *cleanup_unlink; | |
539 | struct compile_module *compile_module; | |
540 | ||
541 | cleanup_xfree = make_cleanup (xfree, object_file); | |
542 | make_cleanup (xfree, source_file); | |
543 | cleanup_unlink = make_cleanup (cleanup_unlink_file, object_file); | |
544 | make_cleanup (cleanup_unlink_file, source_file); | |
545 | compile_module = compile_object_load (object_file, source_file); | |
546 | discard_cleanups (cleanup_unlink); | |
547 | do_cleanups (cleanup_xfree); | |
548 | compile_object_run (compile_module); | |
549 | } | |
550 | } | |
551 | ||
552 | /* See compile/compile-internal.h. */ | |
553 | ||
554 | char * | |
555 | compile_register_name_mangled (struct gdbarch *gdbarch, int regnum) | |
556 | { | |
557 | const char *regname = gdbarch_register_name (gdbarch, regnum); | |
558 | ||
559 | return xstrprintf ("__%s", regname); | |
560 | } | |
561 | ||
562 | /* See compile/compile-internal.h. */ | |
563 | ||
564 | int | |
565 | compile_register_name_demangle (struct gdbarch *gdbarch, | |
566 | const char *regname) | |
567 | { | |
568 | int regnum; | |
569 | ||
570 | if (regname[0] != '_' || regname[1] != '_') | |
571 | error (_("Invalid register name \"%s\"."), regname); | |
572 | regname += 2; | |
573 | ||
574 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) | |
575 | if (strcmp (regname, gdbarch_register_name (gdbarch, regnum)) == 0) | |
576 | return regnum; | |
577 | ||
578 | error (_("Cannot find gdbarch register \"%s\"."), regname); | |
579 | } | |
580 | ||
581 | extern initialize_file_ftype _initialize_compile; | |
582 | ||
583 | void | |
584 | _initialize_compile (void) | |
585 | { | |
586 | struct cmd_list_element *c = NULL; | |
587 | ||
588 | add_prefix_cmd ("compile", class_obscure, compile_command, | |
589 | _("\ | |
590 | Command to compile source code and inject it into the inferior."), | |
591 | &compile_command_list, "compile ", 1, &cmdlist); | |
592 | add_com_alias ("expression", "compile", class_obscure, 0); | |
593 | ||
594 | add_cmd ("code", class_obscure, compile_code_command, | |
595 | _("\ | |
596 | Compile, inject, and execute code.\n\ | |
597 | \n\ | |
598 | Usage: compile code [-r|-raw] [--] [CODE]\n\ | |
599 | -r|-raw: Suppress automatic 'void _gdb_expr () { CODE }' wrapping.\n\ | |
600 | --: Do not parse any options beyond this delimiter. All text to the\n\ | |
601 | right will be treated as source code.\n\ | |
602 | \n\ | |
603 | The source code may be specified as a simple one line expression, e.g.:\n\ | |
604 | \n\ | |
605 | compile code printf(\"Hello world\\n\");\n\ | |
606 | \n\ | |
607 | Alternatively, you can type the source code interactively.\n\ | |
608 | You can invoke this mode when no argument is given to the command\n\ | |
609 | (i.e.,\"compile code\" is typed with nothing after it). An\n\ | |
610 | interactive prompt will be shown allowing you to enter multiple\n\ | |
611 | lines of source code. Type a line containing \"end\" to indicate\n\ | |
612 | the end of the source code."), | |
613 | &compile_command_list); | |
614 | ||
615 | c = add_cmd ("file", class_obscure, compile_file_command, | |
616 | _("\ | |
617 | Evaluate a file containing source code.\n\ | |
618 | \n\ | |
619 | Usage: compile file [-r|-raw] [filename]\n\ | |
620 | -r|-raw: Suppress automatic 'void _gdb_expr () { CODE }' wrapping."), | |
621 | &compile_command_list); | |
622 | set_cmd_completer (c, filename_completer); | |
623 | ||
624 | add_setshow_boolean_cmd ("compile", class_maintenance, &compile_debug, _("\ | |
625 | Set compile command debugging."), _("\ | |
626 | Show compile command debugging."), _("\ | |
627 | When on, compile command debugging is enabled."), | |
628 | NULL, show_compile_debug, | |
629 | &setdebuglist, &showdebuglist); | |
630 | ||
631 | add_setshow_string_cmd ("compile-args", class_support, | |
632 | &compile_args, | |
633 | _("Set compile command GCC command-line arguments"), | |
634 | _("Show compile command GCC command-line arguments"), | |
635 | _("\ | |
636 | Use options like -I (include file directory) or ABI settings.\n\ | |
637 | String quoting is parsed like in shell, for example:\n\ | |
638 | -mno-align-double \"-I/dir with a space/include\""), | |
639 | set_compile_args, show_compile_args, &setlist, &showlist); | |
640 | ||
641 | /* Override flags possibly coming from DW_AT_producer. */ | |
642 | compile_args = xstrdup ("-O0 -gdwarf-4" | |
643 | /* We use -fPIC Otherwise GDB would need to reserve space large enough for | |
644 | any object file in the inferior in advance to get the final address when | |
645 | to link the object file to and additionally the default system linker | |
646 | script would need to be modified so that one can specify there the | |
647 | absolute target address. */ | |
648 | " -fPIC" | |
649 | /* We don't want warnings. */ | |
650 | " -w" | |
651 | /* Override CU's possible -fstack-protector-strong. */ | |
652 | " -fno-stack-protector" | |
653 | ); | |
654 | set_compile_args (compile_args, 0, NULL); | |
655 | } |