File: test-skeleton.c

package info (click to toggle)
glibc 2.24-11+deb9u4
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 225,852 kB
  • sloc: ansic: 996,505; asm: 261,827; sh: 10,484; makefile: 9,856; cpp: 4,169; python: 3,971; perl: 2,254; awk: 1,753; pascal: 1,521; yacc: 291; sed: 80
file content (559 lines) | stat: -rw-r--r-- 13,735 bytes parent folder | download | duplicates (4)
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
/* Skeleton for test programs.
   Copyright (C) 1998-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <malloc.h>
#include <paths.h>
#include <search.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <sys/param.h>
#include <time.h>

/* The test function is normally called `do_test' and it is called
   with argc and argv as the arguments.  We nevertheless provide the
   possibility to overwrite this name.  */
#ifndef TEST_FUNCTION
# define TEST_FUNCTION do_test (argc, argv)
#endif

#ifndef TEST_DATA_LIMIT
# define TEST_DATA_LIMIT (64 << 20) /* Data limit (bytes) to run with.  */
#endif

#ifndef TIMEOUT
  /* Default timeout is twenty seconds.  Tests should normally complete faster
     than this, but if they don't, that's abnormal (a bug) anyways.  */
# define TIMEOUT 20
#endif

#define OPT_DIRECT 1000
#define OPT_TESTDIR 1001

static struct option options[] =
{
#ifdef CMDLINE_OPTIONS
  CMDLINE_OPTIONS
#endif
  { "direct", no_argument, NULL, OPT_DIRECT },
  { "test-dir", required_argument, NULL, OPT_TESTDIR },
  { NULL, 0, NULL, 0 }
};

/* PID of the test itself.  */
static pid_t pid;

/* Directory to place temporary files in.  */
static const char *test_dir;

static void
oom_error (const char *fn, size_t size)
{
  printf ("%s: unable to allocate %zu bytes: %m\n", fn, size);
  exit (1);
}

/* Allocate N bytes of memory dynamically, with error checking.  */
__attribute__ ((unused))
static void *
xmalloc (size_t n)
{
  void *p;

  p = malloc (n);
  if (p == NULL)
    oom_error ("malloc", n);
  return p;
}

/* Allocate memory for N elements of S bytes, with error checking.  */
__attribute__ ((unused))
static void *
xcalloc (size_t n, size_t s)
{
  void *p;

  p = calloc (n, s);
  if (p == NULL)
    oom_error ("calloc", n * s);
  return p;
}

/* Change the size of an allocated block of memory P to N bytes,
   with error checking.  */
__attribute__ ((unused))
static void *
xrealloc (void *p, size_t n)
{
  void *result = realloc (p, n);
  if (result == NULL && (n > 0 || p == NULL))
    oom_error ("realloc", n);
  return result;
}

/* Write a message to standard output.  Can be used in signal
   handlers.  */
static void
__attribute__ ((unused))
write_message (const char *message)
{
  ssize_t unused __attribute__ ((unused));
  unused = write (STDOUT_FILENO, message, strlen (message));
}

/* List of temporary files.  */
struct temp_name_list
{
  struct qelem q;
  char *name;
} *temp_name_list;

/* Add temporary files in list.  */
static void
__attribute__ ((unused))
add_temp_file (const char *name)
{
  struct temp_name_list *newp
    = (struct temp_name_list *) xcalloc (sizeof (*newp), 1);
  char *newname = strdup (name);
  if (newname != NULL)
    {
      newp->name = newname;
      if (temp_name_list == NULL)
	temp_name_list = (struct temp_name_list *) &newp->q;
      else
	insque (newp, temp_name_list);
    }
  else
    free (newp);
}

/* Delete all temporary files.  */
static void
delete_temp_files (void)
{
  while (temp_name_list != NULL)
    {
      remove (temp_name_list->name);
      free (temp_name_list->name);

      struct temp_name_list *next
	= (struct temp_name_list *) temp_name_list->q.q_forw;
      free (temp_name_list);
      temp_name_list = next;
    }
}

/* Create a temporary file.  Return the opened file descriptor on
   success, or -1 on failure.  Write the file name to *FILENAME if
   FILENAME is not NULL.  In this case, the caller is expected to free
   *FILENAME.  */
static int
__attribute__ ((unused))
create_temp_file (const char *base, char **filename)
{
  char *fname;
  int fd;

  fname = (char *) xmalloc (strlen (test_dir) + 1 + strlen (base)
			    + sizeof ("XXXXXX"));
  strcpy (stpcpy (stpcpy (stpcpy (fname, test_dir), "/"), base), "XXXXXX");

  fd = mkstemp (fname);
  if (fd == -1)
    {
      printf ("cannot open temporary file '%s': %m\n", fname);
      free (fname);
      return -1;
    }

  add_temp_file (fname);
  if (filename != NULL)
    *filename = fname;
  else
    free (fname);

  return fd;
}

/* Timeout handler.  We kill the child and exit with an error.  */
static void
__attribute__ ((noreturn))
signal_handler (int sig __attribute__ ((unused)))
{
  int killed;
  int status;

  assert (pid > 1);
  /* Kill the whole process group.  */
  kill (-pid, SIGKILL);
  /* In case setpgid failed in the child, kill it individually too.  */
  kill (pid, SIGKILL);

  /* Wait for it to terminate.  */
  int i;
  for (i = 0; i < 5; ++i)
    {
      killed = waitpid (pid, &status, WNOHANG|WUNTRACED);
      if (killed != 0)
	break;

      /* Delay, give the system time to process the kill.  If the
	 nanosleep() call return prematurely, all the better.  We
	 won't restart it since this probably means the child process
	 finally died.  */
      struct timespec ts;
      ts.tv_sec = 0;
      ts.tv_nsec = 100000000;
      nanosleep (&ts, NULL);
    }
  if (killed != 0 && killed != pid)
    {
      printf ("Failed to kill test process: %m\n");
      exit (1);
    }

#ifdef CLEANUP_HANDLER
  CLEANUP_HANDLER;
#endif

  if (sig == SIGINT)
    {
      signal (sig, SIG_DFL);
      raise (sig);
    }

  /* If we expected this signal: good!  */
#ifdef EXPECTED_SIGNAL
  if (EXPECTED_SIGNAL == SIGALRM)
    exit (0);
#endif

  if (killed == 0 || (WIFSIGNALED (status) && WTERMSIG (status) == SIGKILL))
    puts ("Timed out: killed the child process");
  else if (WIFSTOPPED (status))
    printf ("Timed out: the child process was %s\n",
	    strsignal (WSTOPSIG (status)));
  else if (WIFSIGNALED (status))
    printf ("Timed out: the child process got signal %s\n",
	    strsignal (WTERMSIG (status)));
  else
    printf ("Timed out: killed the child process but it exited %d\n",
	    WEXITSTATUS (status));

  /* Exit with an error.  */
  exit (1);
}

/* Avoid all the buffer overflow messages on stderr.  */
static void
__attribute__ ((unused))
ignore_stderr (void)
{
  int fd = open (_PATH_DEVNULL, O_WRONLY);
  if (fd == -1)
    close (STDERR_FILENO);
  else
    {
      dup2 (fd, STDERR_FILENO);
      close (fd);
    }
  setenv ("LIBC_FATAL_STDERR_", "1", 1);
}

/* Set fortification error handler.  Used when tests want to verify that bad
   code is caught by the library.  */
static void
__attribute__ ((unused))
set_fortify_handler (void (*handler) (int sig))
{
  struct sigaction sa;

  sa.sa_handler = handler;
  sa.sa_flags = 0;
  sigemptyset (&sa.sa_mask);

  sigaction (SIGABRT, &sa, NULL);
  ignore_stderr ();
}

/* Show people how to run the program.  */
static void
usage (void)
{
  size_t i;

  printf ("Usage: %s [options]\n"
	  "\n"
	  "Environment Variables:\n"
	  "  TIMEOUTFACTOR          An integer used to scale the timeout\n"
	  "  TMPDIR                 Where to place temporary files\n"
	  "\n",
	  program_invocation_short_name);
  printf ("Options:\n");
  for (i = 0; options[i].name; ++i)
    {
      int indent;

      indent = printf ("  --%s", options[i].name);
      if (options[i].has_arg == required_argument)
	indent += printf (" <arg>");
      printf ("%*s", 25 - indent, "");
      switch (options[i].val)
	{
	case OPT_DIRECT:
	  printf ("Run the test directly (instead of forking & monitoring)");
	  break;
	case OPT_TESTDIR:
	  printf ("Override the TMPDIR env var");
	  break;
	}
      printf ("\n");
    }
}

/* We provide the entry point here.  */
int
main (int argc, char *argv[])
{
  int direct = 0;	/* Directly call the test function?  */
  int status;
  int opt;
  unsigned int timeoutfactor = 1;
  pid_t termpid;

  /* Make uses of freed and uninitialized memory known.  */
  mallopt (M_PERTURB, 42);

#ifdef STDOUT_UNBUFFERED
  setbuf (stdout, NULL);
#endif

  while ((opt = getopt_long (argc, argv, "+", options, NULL)) != -1)
    switch (opt)
      {
      case '?':
	usage ();
	exit (1);
      case OPT_DIRECT:
	direct = 1;
	break;
      case OPT_TESTDIR:
	test_dir = optarg;
	break;
#ifdef CMDLINE_PROCESS
	CMDLINE_PROCESS
#endif
      }

  /* If set, read the test TIMEOUTFACTOR value from the environment.
     This value is used to scale the default test timeout values. */
  char *envstr_timeoutfactor = getenv ("TIMEOUTFACTOR");
  if (envstr_timeoutfactor != NULL)
    {
      char *envstr_conv = envstr_timeoutfactor;
      unsigned long int env_fact;

      env_fact = strtoul (envstr_timeoutfactor, &envstr_conv, 0);
      if (*envstr_conv == '\0' && envstr_conv != envstr_timeoutfactor)
	timeoutfactor = MAX (env_fact, 1);
    }

  /* Set TMPDIR to specified test directory.  */
  if (test_dir != NULL)
    {
      setenv ("TMPDIR", test_dir, 1);

      if (chdir (test_dir) < 0)
	{
	  printf ("chdir: %m\n");
	  exit (1);
	}
    }
  else
    {
      test_dir = getenv ("TMPDIR");
      if (test_dir == NULL || test_dir[0] == '\0')
	test_dir = "/tmp";
    }

  /* Make sure we see all message, even those on stdout.  */
  setvbuf (stdout, NULL, _IONBF, 0);

  /* Make sure temporary files are deleted.  */
  atexit (delete_temp_files);

  /* Correct for the possible parameters.  */
  argv[optind - 1] = argv[0];
  argv += optind - 1;
  argc -= optind - 1;

  /* Call the initializing function, if one is available.  */
#ifdef PREPARE
  PREPARE (argc, argv);
#endif

  const char *envstr_direct = getenv ("TEST_DIRECT");
  if (envstr_direct != NULL)
    {
      FILE *f = fopen (envstr_direct, "w");
      if (f == NULL)
        {
          printf ("cannot open TEST_DIRECT output file '%s': %m\n",
                  envstr_direct);
          exit (1);
        }

      fprintf (f, "timeout=%u\ntimeoutfactor=%u\n", TIMEOUT, timeoutfactor);
#ifdef EXPECTED_STATUS
      fprintf (f, "exit=%u\n", EXPECTED_STATUS);
#endif
#ifdef EXPECTED_SIGNAL
      switch (EXPECTED_SIGNAL)
        {
        default: abort ();
# define init_sig(signo, name, text) \
        case signo: fprintf (f, "signal=%s\n", name); break;
# include <siglist.h>
# undef init_sig
        }
#endif

      if (temp_name_list != NULL)
        {
          struct temp_name_list *n;
          fprintf (f, "temp_files=(\n");
          for (n = temp_name_list;
               n != NULL;
               n = (struct temp_name_list *) n->q.q_forw)
            fprintf (f, "  '%s'\n", n->name);
          fprintf (f, ")\n");
        }

      fclose (f);
      direct = 1;
    }

  /* If we are not expected to fork run the function immediately.  */
  if (direct)
    return TEST_FUNCTION;

  /* Set up the test environment:
     - prevent core dumps
     - set up the timer
     - fork and execute the function.  */

  pid = fork ();
  if (pid == 0)
    {
      /* This is the child.  */
#ifdef RLIMIT_CORE
      /* Try to avoid dumping core.  */
      struct rlimit core_limit;
      core_limit.rlim_cur = 0;
      core_limit.rlim_max = 0;
      setrlimit (RLIMIT_CORE, &core_limit);
#endif

      /* We put the test process in its own pgrp so that if it bogusly
	 generates any job control signals, they won't hit the whole build.  */
      if (setpgid (0, 0) != 0)
	printf ("Failed to set the process group ID: %m\n");

      /* Execute the test function and exit with the return value.   */
      exit (TEST_FUNCTION);
    }
  else if (pid < 0)
    {
      printf ("Cannot fork test program: %m\n");
      exit (1);
    }

  /* Set timeout.  */
  signal (SIGALRM, signal_handler);
  alarm (TIMEOUT * timeoutfactor);

  /* Make sure we clean up if the wrapper gets interrupted.  */
  signal (SIGINT, signal_handler);

  /* Wait for the regular termination.  */
  termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
  if (termpid == -1)
    {
      printf ("Waiting for test program failed: %m\n");
      exit (1);
    }
  if (termpid != pid)
    {
      printf ("Oops, wrong test program terminated: expected %ld, got %ld\n",
	      (long int) pid, (long int) termpid);
      exit (1);
    }

  /* Process terminated normaly without timeout etc.  */
  if (WIFEXITED (status))
    {
#ifndef EXPECTED_STATUS
# ifndef EXPECTED_SIGNAL
      /* Simply exit with the return value of the test.  */
      return WEXITSTATUS (status);
# else
      printf ("Expected signal '%s' from child, got none\n",
	      strsignal (EXPECTED_SIGNAL));
      exit (1);
# endif
#else
      if (WEXITSTATUS (status) != EXPECTED_STATUS)
        {
          printf ("Expected status %d, got %d\n",
	          EXPECTED_STATUS, WEXITSTATUS (status));
          exit (1);
        }

      return 0;
#endif
    }
  /* Process was killed by timer or other signal.  */
  else
    {
#ifndef EXPECTED_SIGNAL
      printf ("Didn't expect signal from child: got `%s'\n",
	      strsignal (WTERMSIG (status)));
      exit (1);
#else
      if (WTERMSIG (status) != EXPECTED_SIGNAL)
	{
	  printf ("Incorrect signal from child: got `%s', need `%s'\n",
		  strsignal (WTERMSIG (status)),
		  strsignal (EXPECTED_SIGNAL));
	  exit (1);
	}

      return 0;
#endif
    }
}