aboutsummaryrefslogtreecommitdiff
path: root/gdb/compile/compile.c
blob: 7560028ec0644a3ee813a666349665ed420277f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
/* General Compile and inject code

   Copyright (C) 2014-2015 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "interps.h"
#include "ui-out.h"
#include "command.h"
#include "cli/cli-script.h"
#include "cli/cli-utils.h"
#include "completer.h"
#include "gdbcmd.h"
#include "compile.h"
#include "compile-internal.h"
#include "compile-object-load.h"
#include "compile-object-run.h"
#include "language.h"
#include "frame.h"
#include "source.h"
#include "block.h"
#include "arch-utils.h"
#include "filestuff.h"
#include "target.h"
#include "osabi.h"
#include "gdb_wait.h"
#include "valprint.h"



/* Initial filename for temporary files.  */

#define TMP_PREFIX "/tmp/gdbobj-"

/* Hold "compile" commands.  */

static struct cmd_list_element *compile_command_list;

/* Debug flag for "compile" commands.  */

int compile_debug;

/* Implement "show debug compile".  */

static void
show_compile_debug (struct ui_file *file, int from_tty,
		    struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Compile debugging is %s.\n"), value);
}



/* Check *ARG for a "-raw" or "-r" argument.  Return 0 if not seen.
   Return 1 if seen and update *ARG.  */

static int
check_raw_argument (char **arg)
{
  *arg = skip_spaces (*arg);

  if (arg != NULL
      && (check_for_argument (arg, "-raw", sizeof ("-raw") - 1)
	  || check_for_argument (arg, "-r", sizeof ("-r") - 1)))
      return 1;
  return 0;
}

/* Handle the input from the 'compile file' command.  The "compile
   file" command is used to evaluate an expression contained in a file
   that may contain calls to the GCC compiler.  */

static void
compile_file_command (char *arg, int from_tty)
{
  enum compile_i_scope_types scope = COMPILE_I_SIMPLE_SCOPE;
  char *buffer;
  struct cleanup *cleanup;

  cleanup = make_cleanup_restore_integer (&interpreter_async);
  interpreter_async = 0;

  /* Check the user did not just <enter> after command.  */
  if (arg == NULL)
    error (_("You must provide a filename for this command."));

  /* Check if a raw (-r|-raw) argument is provided.  */
  if (arg != NULL && check_raw_argument (&arg))
    {
      scope = COMPILE_I_RAW_SCOPE;
      arg = skip_spaces (arg);
    }

  /* After processing arguments, check there is a filename at the end
     of the command.  */
  if (arg[0] == '\0')
    error (_("You must provide a filename with the raw option set."));

  if (arg[0] == '-')
    error (_("Unknown argument specified."));

  arg = skip_spaces (arg);
  arg = gdb_abspath (arg);
  make_cleanup (xfree, arg);
  buffer = xstrprintf ("#include \"%s\"\n", arg);
  make_cleanup (xfree, buffer);
  eval_compile_command (NULL, buffer, scope, NULL);
  do_cleanups (cleanup);
}

/* Handle the input from the 'compile code' command.  The
   "compile code" command is used to evaluate an expression that may
   contain calls to the GCC compiler.  The language expected in this
   compile command is the language currently set in GDB.  */

static void
compile_code_command (char *arg, int from_tty)
{
  struct cleanup *cleanup;
  enum compile_i_scope_types scope = COMPILE_I_SIMPLE_SCOPE;

  cleanup = make_cleanup_restore_integer (&interpreter_async);
  interpreter_async = 0;

  if (arg != NULL && check_raw_argument (&arg))
    {
      scope = COMPILE_I_RAW_SCOPE;
      arg = skip_spaces (arg);
    }

  arg = skip_spaces (arg);

  if (arg != NULL && !check_for_argument (&arg, "--", sizeof ("--") - 1))
    {
      if (arg[0] == '-')
	error (_("Unknown argument specified."));
    }

  if (arg && *arg)
    eval_compile_command (NULL, arg, scope, NULL);
  else
    {
      struct command_line *l = get_command_line (compile_control, "");

      make_cleanup_free_command_lines (&l);
      l->control_u.compile.scope = scope;
      execute_control_command_untraced (l);
    }

  do_cleanups (cleanup);
}

/* Callback for compile_print_command.  */

void
compile_print_value (struct value *val, void *data_voidp)
{
  const struct format_data *fmtp = (const struct format_data *) data_voidp;

  print_value (val, fmtp);
}

/* Handle the input from the 'compile print' command.  The "compile
   print" command is used to evaluate and print an expression that may
   contain calls to the GCC compiler.  The language expected in this
   compile command is the language currently set in GDB.  */

static void
compile_print_command (char *arg_param, int from_tty)
{
  const char *arg = arg_param;
  struct cleanup *cleanup;
  enum compile_i_scope_types scope = COMPILE_I_PRINT_ADDRESS_SCOPE;
  struct format_data fmt;

  cleanup = make_cleanup_restore_integer (&interpreter_async);
  interpreter_async = 0;

  /* Passing &FMT as SCOPE_DATA is safe as do_module_cleanup will not
     touch the stale pointer if compile_object_run has already quit.  */
  print_command_parse_format (&arg, "compile print", &fmt);

  if (arg && *arg)
    eval_compile_command (NULL, arg, scope, &fmt);
  else
    {
      struct command_line *l = get_command_line (compile_control, "");

      make_cleanup_free_command_lines (&l);
      l->control_u.compile.scope = scope;
      l->control_u.compile.scope_data = &fmt;
      execute_control_command_untraced (l);
    }

  do_cleanups (cleanup);
}

/* A cleanup function to remove a directory and all its contents.  */

static void
do_rmdir (void *arg)
{
  const char *dir = (const char *) arg;
  char *zap;
  int wstat;

  gdb_assert (startswith (dir, TMP_PREFIX));
  zap = concat ("rm -rf ", dir, (char *) NULL);
  wstat = system (zap);
  if (wstat == -1 || !WIFEXITED (wstat) || WEXITSTATUS (wstat) != 0)
    warning (_("Could not remove temporary directory %s"), dir);
  XDELETEVEC (zap);
}

/* Return the name of the temporary directory to use for .o files, and
   arrange for the directory to be removed at shutdown.  */

static const char *
get_compile_file_tempdir (void)
{
  static char *tempdir_name;

#define TEMPLATE TMP_PREFIX "XXXXXX"
  char tname[sizeof (TEMPLATE)];

  if (tempdir_name != NULL)
    return tempdir_name;

  strcpy (tname, TEMPLATE);
#undef TEMPLATE
#ifdef HAVE_MKDTEMP
  tempdir_name = mkdtemp (tname);
#else
  error (_("Command not supported on this host."));
#endif
  if (tempdir_name == NULL)
    perror_with_name (_("Could not make temporary directory"));

  tempdir_name = xstrdup (tempdir_name);
  make_final_cleanup (do_rmdir, tempdir_name);
  return tempdir_name;
}

/* Compute the names of source and object files to use.  The names are
   allocated by malloc and should be freed by the caller.  */

static void
get_new_file_names (char **source_file, char **object_file)
{
  static int seq;
  const char *dir = get_compile_file_tempdir ();

  ++seq;
  *source_file = xstrprintf ("%s%sout%d.c", dir, SLASH_STRING, seq);
  *object_file = xstrprintf ("%s%sout%d.o", dir, SLASH_STRING, seq);
}

/* Get the block and PC at which to evaluate an expression.  */

static const struct block *
get_expr_block_and_pc (CORE_ADDR *pc)
{
  const struct block *block = get_selected_block (pc);

  if (block == NULL)
    {
      struct symtab_and_line cursal = get_current_source_symtab_and_line ();

      if (cursal.symtab)
	block = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (cursal.symtab),
				   STATIC_BLOCK);
      if (block != NULL)
	*pc = BLOCK_START (block);
    }
  else
    *pc = BLOCK_START (block);

  return block;
}

/* Call gdb_buildargv, set its result for S into *ARGVP but calculate also the
   number of parsed arguments into *ARGCP.  If gdb_buildargv has returned NULL
   then *ARGCP is set to zero.  */

static void
build_argc_argv (const char *s, int *argcp, char ***argvp)
{
  *argvp = gdb_buildargv (s);
  *argcp = countargv (*argvp);
}

/* String for 'set compile-args' and 'show compile-args'.  */
static char *compile_args;

/* Parsed form of COMPILE_ARGS.  COMPILE_ARGS_ARGV is NULL terminated.  */
static int compile_args_argc;
static char **compile_args_argv;

/* Implement 'set compile-args'.  */

static void
set_compile_args (char *args, int from_tty, struct cmd_list_element *c)
{
  freeargv (compile_args_argv);
  build_argc_argv (compile_args, &compile_args_argc, &compile_args_argv);
}

/* Implement 'show compile-args'.  */

static void
show_compile_args (struct ui_file *file, int from_tty,
		   struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Compile command command-line arguments "
			    "are \"%s\".\n"),
		    value);
}

/* Append ARGC and ARGV (as parsed by build_argc_argv) to *ARGCP and *ARGVP.
   ARGCP+ARGVP can be zero+NULL and also ARGC+ARGV can be zero+NULL.  */

static void
append_args (int *argcp, char ***argvp, int argc, char **argv)
{
  int argi;

  *argvp = XRESIZEVEC (char *, *argvp, (*argcp + argc + 1));

  for (argi = 0; argi < argc; argi++)
    (*argvp)[(*argcp)++] = xstrdup (argv[argi]);
  (*argvp)[(*argcp)] = NULL;
}

/* Return DW_AT_producer parsed for get_selected_frame () (if any).
   Return NULL otherwise.

   GCC already filters its command-line arguments only for the suitable ones to
   put into DW_AT_producer - see GCC function gen_producer_string.  */

static const char *
get_selected_pc_producer_options (void)
{
  CORE_ADDR pc = get_frame_pc (get_selected_frame (NULL));
  struct compunit_symtab *symtab = find_pc_compunit_symtab (pc);
  const char *cs;

  if (symtab == NULL || symtab->producer == NULL
      || !startswith (symtab->producer, "GNU "))
    return NULL;

  cs = symtab->producer;
  while (*cs != 0 && *cs != '-')
    cs = skip_spaces_const (skip_to_space_const (cs));
  if (*cs != '-')
    return NULL;
  return cs;
}

/* Filter out unwanted options from *ARGCP and ARGV.  */

static void
filter_args (int *argcp, char **argv)
{
  char **destv;

  for (destv = argv; *argv != NULL; argv++)
    {
      /* -fpreprocessed may get in commonly from ccache.  */
      if (strcmp (*argv, "-fpreprocessed") == 0)
	{
	  xfree (*argv);
	  (*argcp)--;
	  continue;
	}
      *destv++ = *argv;
    }
  *destv = NULL;
}

/* Produce final vector of GCC compilation options.  First element is target
   size ("-m64", "-m32" etc.), optionally followed by DW_AT_producer options
   and then compile-args string GDB variable.  */

static void
get_args (const struct compile_instance *compiler, struct gdbarch *gdbarch,
	  int *argcp, char ***argvp)
{
  const char *cs_producer_options;
  int argc_compiler;
  char **argv_compiler;

  build_argc_argv (gdbarch_gcc_target_options (gdbarch),
		   argcp, argvp);

  cs_producer_options = get_selected_pc_producer_options ();
  if (cs_producer_options != NULL)
    {
      int argc_producer;
      char **argv_producer;

      build_argc_argv (cs_producer_options, &argc_producer, &argv_producer);
      filter_args (&argc_producer, argv_producer);
      append_args (argcp, argvp, argc_producer, argv_producer);
      freeargv (argv_producer);
    }

  build_argc_argv (compiler->gcc_target_options,
		   &argc_compiler, &argv_compiler);
  append_args (argcp, argvp, argc_compiler, argv_compiler);
  freeargv (argv_compiler);

  append_args (argcp, argvp, compile_args_argc, compile_args_argv);
}

/* A cleanup function to destroy a gdb_gcc_instance.  */

static void
cleanup_compile_instance (void *arg)
{
  struct compile_instance *inst = (struct compile_instance *) arg;

  inst->destroy (inst);
}

/* A cleanup function to unlink a file.  */

static void
cleanup_unlink_file (void *arg)
{
  const char *filename = (const char *) arg;

  unlink (filename);
}

/* A helper function suitable for use as the "print_callback" in the
   compiler object.  */

static void
print_callback (void *ignore, const char *message)
{
  fputs_filtered (message, gdb_stderr);
}

/* Process the compilation request.  On success it returns the object
   file name and *SOURCE_FILEP is set to source file name.  On an
   error condition, error () is called.  The caller is responsible for
   freeing both strings.  */

static char *
compile_to_object (struct command_line *cmd, const char *cmd_string,
		   enum compile_i_scope_types scope,
		   char **source_filep)
{
  char *code;
  const char *input;
  char *source_file, *object_file;
  struct compile_instance *compiler;
  struct cleanup *cleanup, *inner_cleanup;
  const struct block *expr_block;
  CORE_ADDR trash_pc, expr_pc;
  int argc;
  char **argv;
  int ok;
  FILE *src;
  struct gdbarch *gdbarch = get_current_arch ();
  const char *os_rx;
  const char *arch_rx;
  char *triplet_rx;
  char *error_message;

  if (!target_has_execution)
    error (_("The program must be running for the compile command to "\
	     "work."));

  expr_block = get_expr_block_and_pc (&trash_pc);
  expr_pc = get_frame_address_in_block (get_selected_frame (NULL));

  /* Set up instance and context for the compiler.  */
  if (current_language->la_get_compile_instance == NULL)
    error (_("No compiler support for language %s."),
	   current_language->la_name);
  compiler = current_language->la_get_compile_instance ();
  cleanup = make_cleanup (cleanup_compile_instance, compiler);

  compiler->fe->ops->set_print_callback (compiler->fe, print_callback, NULL);

  compiler->scope = scope;
  compiler->block = expr_block;

  /* From the provided expression, build a scope to pass to the
     compiler.  */
  if (cmd != NULL)
    {
      struct ui_file *stream = mem_fileopen ();
      struct command_line *iter;
      char *stream_buf;

      make_cleanup_ui_file_delete (stream);
      for (iter = cmd->body_list[0]; iter; iter = iter->next)
	{
	  fputs_unfiltered (iter->line, stream);
	  fputs_unfiltered ("\n", stream);
	}

      stream_buf = ui_file_xstrdup (stream, NULL);
      make_cleanup (xfree, stream_buf);
      input = stream_buf;
    }
  else if (cmd_string != NULL)
    input = cmd_string;
  else
    error (_("Neither a simple expression, or a multi-line specified."));

  code = current_language->la_compute_program (compiler, input, gdbarch,
					       expr_block, expr_pc);
  make_cleanup (xfree, code);
  if (compile_debug)
    fprintf_unfiltered (gdb_stdlog, "debug output:\n\n%s", code);

  os_rx = osabi_triplet_regexp (gdbarch_osabi (gdbarch));
  arch_rx = gdbarch_gnu_triplet_regexp (gdbarch);

  /* Allow triplets with or without vendor set.  */
  triplet_rx = concat (arch_rx, "(-[^-]*)?-", os_rx, (char *) NULL);
  make_cleanup (xfree, triplet_rx);

  /* Set compiler command-line arguments.  */
  get_args (compiler, gdbarch, &argc, &argv);
  make_cleanup_freeargv (argv);

  error_message = compiler->fe->ops->set_arguments (compiler->fe, triplet_rx,
						    argc, argv);
  if (error_message != NULL)
    {
      make_cleanup (xfree, error_message);
      error ("%s", error_message);
    }

  if (compile_debug)
    {
      int argi;

      fprintf_unfiltered (gdb_stdlog, "Passing %d compiler options:\n", argc);
      for (argi = 0; argi < argc; argi++)
	fprintf_unfiltered (gdb_stdlog, "Compiler option %d: <%s>\n",
			    argi, argv[argi]);
    }

  get_new_file_names (&source_file, &object_file);
  inner_cleanup = make_cleanup (xfree, source_file);
  make_cleanup (xfree, object_file);

  src = gdb_fopen_cloexec (source_file, "w");
  if (src == NULL)
    perror_with_name (_("Could not open source file for writing"));
  make_cleanup (cleanup_unlink_file, source_file);
  if (fputs (code, src) == EOF)
    perror_with_name (_("Could not write to source file"));
  fclose (src);

  if (compile_debug)
    fprintf_unfiltered (gdb_stdlog, "source file produced: %s\n\n",
			source_file);

  /* Call the compiler and start the compilation process.  */
  compiler->fe->ops->set_source_file (compiler->fe, source_file);

  if (!compiler->fe->ops->compile (compiler->fe, object_file,
				   compile_debug))
    error (_("Compilation failed."));

  if (compile_debug)
    fprintf_unfiltered (gdb_stdlog, "object file produced: %s\n\n",
			object_file);

  discard_cleanups (inner_cleanup);
  do_cleanups (cleanup);
  *source_filep = source_file;
  return object_file;
}

/* The "compile" prefix command.  */

static void
compile_command (char *args, int from_tty)
{
  /* If a sub-command is not specified to the compile prefix command,
     assume it is a direct code compilation.  */
  compile_code_command (args, from_tty);
}

/* See compile.h.  */

void
eval_compile_command (struct command_line *cmd, const char *cmd_string,
		      enum compile_i_scope_types scope, void *scope_data)
{
  char *object_file, *source_file;

  object_file = compile_to_object (cmd, cmd_string, scope, &source_file);
  if (object_file != NULL)
    {
      struct cleanup *cleanup_xfree, *cleanup_unlink;
      struct compile_module *compile_module;

      cleanup_xfree = make_cleanup (xfree, object_file);
      make_cleanup (xfree, source_file);
      cleanup_unlink = make_cleanup (cleanup_unlink_file, object_file);
      make_cleanup (cleanup_unlink_file, source_file);
      compile_module = compile_object_load (object_file, source_file,
					    scope, scope_data);
      if (compile_module == NULL)
	{
	  gdb_assert (scope == COMPILE_I_PRINT_ADDRESS_SCOPE);
	  do_cleanups (cleanup_xfree);
	  eval_compile_command (cmd, cmd_string,
				COMPILE_I_PRINT_VALUE_SCOPE, scope_data);
	  return;
	}
      discard_cleanups (cleanup_unlink);
      do_cleanups (cleanup_xfree);
      compile_object_run (compile_module);
    }
}

/* See compile/compile-internal.h.  */

char *
compile_register_name_mangled (struct gdbarch *gdbarch, int regnum)
{
  const char *regname = gdbarch_register_name (gdbarch, regnum);

  return xstrprintf ("__%s", regname);
}

/* See compile/compile-internal.h.  */

int
compile_register_name_demangle (struct gdbarch *gdbarch,
				 const char *regname)
{
  int regnum;

  if (regname[0] != '_' || regname[1] != '_')
    error (_("Invalid register name \"%s\"."), regname);
  regname += 2;

  for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
    if (strcmp (regname, gdbarch_register_name (gdbarch, regnum)) == 0)
      return regnum;

  error (_("Cannot find gdbarch register \"%s\"."), regname);
}

extern initialize_file_ftype _initialize_compile;

void
_initialize_compile (void)
{
  struct cmd_list_element *c = NULL;

  add_prefix_cmd ("compile", class_obscure, compile_command,
		  _("\
Command to compile source code and inject it into the inferior."),
		  &compile_command_list, "compile ", 1, &cmdlist);
  add_com_alias ("expression", "compile", class_obscure, 0);

  add_cmd ("code", class_obscure, compile_code_command,
	   _("\
Compile, inject, and execute code.\n\
\n\
Usage: compile code [-r|-raw] [--] [CODE]\n\
-r|-raw: Suppress automatic 'void _gdb_expr () { CODE }' wrapping.\n\
--: Do not parse any options beyond this delimiter.  All text to the\n\
    right will be treated as source code.\n\
\n\
The source code may be specified as a simple one line expression, e.g.:\n\
\n\
    compile code printf(\"Hello world\\n\");\n\
\n\
Alternatively, you can type a multiline expression by invoking\n\
this command with no argument.  GDB will then prompt for the\n\
expression interactively; type a line containing \"end\" to\n\
indicate the end of the expression."),
	   &compile_command_list);

  c = add_cmd ("file", class_obscure, compile_file_command,
	       _("\
Evaluate a file containing source code.\n\
\n\
Usage: compile file [-r|-raw] [filename]\n\
-r|-raw: Suppress automatic 'void _gdb_expr () { CODE }' wrapping."),
	       &compile_command_list);
  set_cmd_completer (c, filename_completer);

  add_cmd ("print", class_obscure, compile_print_command,
	   _("\
Evaluate EXPR by using the compiler and print result.\n\
\n\
Usage: compile print[/FMT] [EXPR]\n\
\n\
The expression may be specified on the same line as the command, e.g.:\n\
\n\
    compile print i\n\
\n\
Alternatively, you can type a multiline expression by invoking\n\
this command with no argument.  GDB will then prompt for the\n\
expression interactively; type a line containing \"end\" to\n\
indicate the end of the expression.\n\
\n\
EXPR may be preceded with /FMT, where FMT is a format letter\n\
but no count or size letter (see \"x\" command)."),
	   &compile_command_list);

  add_setshow_boolean_cmd ("compile", class_maintenance, &compile_debug, _("\
Set compile command debugging."), _("\
Show compile command debugging."), _("\
When on, compile command debugging is enabled."),
			   NULL, show_compile_debug,
			   &setdebuglist, &showdebuglist);

  add_setshow_string_cmd ("compile-args", class_support,
			  &compile_args,
			  _("Set compile command GCC command-line arguments"),
			  _("Show compile command GCC command-line arguments"),
			  _("\
Use options like -I (include file directory) or ABI settings.\n\
String quoting is parsed like in shell, for example:\n\
  -mno-align-double \"-I/dir with a space/include\""),
			  set_compile_args, show_compile_args, &setlist, &showlist);

  /* Override flags possibly coming from DW_AT_producer.  */
  compile_args = xstrdup ("-O0 -gdwarf-4"
  /* We use -fPIE Otherwise GDB would need to reserve space large enough for
     any object file in the inferior in advance to get the final address when
     to link the object file to and additionally the default system linker
     script would need to be modified so that one can specify there the
     absolute target address.
     -fPIC is not used at is would require from GDB to generate .got.  */
			 " -fPIE"
  /* We want warnings, except for some commonly happening for GDB commands.  */
			 " -Wall "
			 " -Wno-implicit-function-declaration"
			 " -Wno-unused-but-set-variable"
			 " -Wno-unused-variable"
  /* Override CU's possible -fstack-protector-strong.  */
			 " -fno-stack-protector"
  );
  set_compile_args (compile_args, 0, NULL);
}