1 /* Skeleton for test programs.
2 Copyright (C) 1998-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
32 #include <sys/resource.h>
34 #include <sys/param.h>
37 /* The test function is normally called `do_test' and it is called
38 with argc and argv as the arguments. We nevertheless provide the
39 possibility to overwrite this name. */
41 # define TEST_FUNCTION do_test (argc, argv)
44 #ifndef TEST_DATA_LIMIT
45 # define TEST_DATA_LIMIT (64 << 20) /* Data limit (bytes) to run with. */
49 /* Default timeout is twenty seconds. Tests should normally complete faster
50 than this, but if they don't, that's abnormal (a bug) anyways. */
54 #define OPT_DIRECT 1000
55 #define OPT_TESTDIR 1001
57 static struct option options[] =
59 #ifdef CMDLINE_OPTIONS
62 { "direct", no_argument, NULL, OPT_DIRECT },
63 { "test-dir", required_argument, NULL, OPT_TESTDIR },
67 /* PID of the test itself. */
70 /* Directory to place temporary files in. */
71 static const char *test_dir;
74 oom_error (const char *fn, size_t size)
76 printf ("%s: unable to allocate %zu bytes: %m\n", fn, size);
80 /* Allocate N bytes of memory dynamically, with error checking. */
81 __attribute__ ((unused))
89 oom_error ("malloc", n);
93 /* Allocate memory for N elements of S bytes, with error checking. */
94 __attribute__ ((unused))
96 xcalloc (size_t n, size_t s)
102 oom_error ("calloc", n * s);
106 /* Change the size of an allocated block of memory P to N bytes,
107 with error checking. */
108 __attribute__ ((unused))
110 xrealloc (void *p, size_t n)
112 void *result = realloc (p, n);
113 if (result == NULL && (n > 0 || p == NULL))
114 oom_error ("realloc", n);
118 /* Write a message to standard output. Can be used in signal
121 __attribute__ ((unused))
122 write_message (const char *message)
124 ssize_t unused __attribute__ ((unused));
125 unused = write (STDOUT_FILENO, message, strlen (message));
128 /* List of temporary files. */
129 struct temp_name_list
135 /* Add temporary files in list. */
137 __attribute__ ((unused))
138 add_temp_file (const char *name)
140 struct temp_name_list *newp
141 = (struct temp_name_list *) xcalloc (sizeof (*newp), 1);
142 char *newname = strdup (name);
145 newp->name = newname;
146 if (temp_name_list == NULL)
147 temp_name_list = (struct temp_name_list *) &newp->q;
149 insque (newp, temp_name_list);
155 /* Delete all temporary files. */
157 delete_temp_files (void)
159 while (temp_name_list != NULL)
161 remove (temp_name_list->name);
162 free (temp_name_list->name);
164 struct temp_name_list *next
165 = (struct temp_name_list *) temp_name_list->q.q_forw;
166 free (temp_name_list);
167 temp_name_list = next;
171 /* Create a temporary file. Return the opened file descriptor on
172 success, or -1 on failure. Write the file name to *FILENAME if
173 FILENAME is not NULL. In this case, the caller is expected to free
176 __attribute__ ((unused))
177 create_temp_file (const char *base, char **filename)
182 fname = (char *) xmalloc (strlen (test_dir) + 1 + strlen (base)
183 + sizeof ("XXXXXX"));
184 strcpy (stpcpy (stpcpy (stpcpy (fname, test_dir), "/"), base), "XXXXXX");
186 fd = mkstemp (fname);
189 printf ("cannot open temporary file '%s': %m\n", fname);
194 add_temp_file (fname);
195 if (filename != NULL)
203 /* Timeout handler. We kill the child and exit with an error. */
205 __attribute__ ((noreturn))
206 signal_handler (int sig __attribute__ ((unused)))
212 /* Kill the whole process group. */
213 kill (-pid, SIGKILL);
214 /* In case setpgid failed in the child, kill it individually too. */
217 /* Wait for it to terminate. */
219 for (i = 0; i < 5; ++i)
221 killed = waitpid (pid, &status, WNOHANG|WUNTRACED);
225 /* Delay, give the system time to process the kill. If the
226 nanosleep() call return prematurely, all the better. We
227 won't restart it since this probably means the child process
231 ts.tv_nsec = 100000000;
232 nanosleep (&ts, NULL);
234 if (killed != 0 && killed != pid)
236 printf ("Failed to kill test process: %m\n");
240 #ifdef CLEANUP_HANDLER
246 signal (sig, SIG_DFL);
250 /* If we expected this signal: good! */
251 #ifdef EXPECTED_SIGNAL
252 if (EXPECTED_SIGNAL == SIGALRM)
256 if (killed == 0 || (WIFSIGNALED (status) && WTERMSIG (status) == SIGKILL))
257 puts ("Timed out: killed the child process");
258 else if (WIFSTOPPED (status))
259 printf ("Timed out: the child process was %s\n",
260 strsignal (WSTOPSIG (status)));
261 else if (WIFSIGNALED (status))
262 printf ("Timed out: the child process got signal %s\n",
263 strsignal (WTERMSIG (status)));
265 printf ("Timed out: killed the child process but it exited %d\n",
266 WEXITSTATUS (status));
268 /* Exit with an error. */
272 /* Avoid all the buffer overflow messages on stderr. */
274 __attribute__ ((unused))
277 int fd = open (_PATH_DEVNULL, O_WRONLY);
279 close (STDERR_FILENO);
282 dup2 (fd, STDERR_FILENO);
285 setenv ("LIBC_FATAL_STDERR_", "1", 1);
288 /* Set fortification error handler. Used when tests want to verify that bad
289 code is caught by the library. */
291 __attribute__ ((unused))
292 set_fortify_handler (void (*handler) (int sig))
296 sa.sa_handler = handler;
298 sigemptyset (&sa.sa_mask);
300 sigaction (SIGABRT, &sa, NULL);
304 /* Show people how to run the program. */
310 printf ("Usage: %s [options]\n"
312 "Environment Variables:\n"
313 " TIMEOUTFACTOR An integer used to scale the timeout\n"
314 " TMPDIR Where to place temporary files\n"
316 program_invocation_short_name);
317 printf ("Options:\n");
318 for (i = 0; options[i].name; ++i)
322 indent = printf (" --%s", options[i].name);
323 if (options[i].has_arg == required_argument)
324 indent += printf (" <arg>");
325 printf ("%*s", 25 - indent, "");
326 switch (options[i].val)
329 printf ("Run the test directly (instead of forking & monitoring)");
332 printf ("Override the TMPDIR env var");
339 /* We provide the entry point here. */
341 main (int argc, char *argv[])
343 int direct = 0; /* Directly call the test function? */
346 unsigned int timeoutfactor = 1;
349 /* Make uses of freed and uninitialized memory known. */
350 mallopt (M_PERTURB, 42);
352 #ifdef STDOUT_UNBUFFERED
353 setbuf (stdout, NULL);
356 while ((opt = getopt_long (argc, argv, "+", options, NULL)) != -1)
368 #ifdef CMDLINE_PROCESS
373 /* If set, read the test TIMEOUTFACTOR value from the environment.
374 This value is used to scale the default test timeout values. */
375 char *envstr_timeoutfactor = getenv ("TIMEOUTFACTOR");
376 if (envstr_timeoutfactor != NULL)
378 char *envstr_conv = envstr_timeoutfactor;
379 unsigned long int env_fact;
381 env_fact = strtoul (envstr_timeoutfactor, &envstr_conv, 0);
382 if (*envstr_conv == '\0' && envstr_conv != envstr_timeoutfactor)
383 timeoutfactor = MAX (env_fact, 1);
386 /* Set TMPDIR to specified test directory. */
387 if (test_dir != NULL)
389 setenv ("TMPDIR", test_dir, 1);
391 if (chdir (test_dir) < 0)
393 printf ("chdir: %m\n");
399 test_dir = getenv ("TMPDIR");
400 if (test_dir == NULL || test_dir[0] == '\0')
404 /* Make sure we see all message, even those on stdout. */
405 setvbuf (stdout, NULL, _IONBF, 0);
407 /* Make sure temporary files are deleted. */
408 atexit (delete_temp_files);
410 /* Correct for the possible parameters. */
411 argv[optind - 1] = argv[0];
415 /* Call the initializing function, if one is available. */
417 PREPARE (argc, argv);
420 const char *envstr_direct = getenv ("TEST_DIRECT");
421 if (envstr_direct != NULL)
423 FILE *f = fopen (envstr_direct, "w");
426 printf ("cannot open TEST_DIRECT output file '%s': %m\n",
431 fprintf (f, "timeout=%u\ntimeoutfactor=%u\n", TIMEOUT, timeoutfactor);
432 #ifdef EXPECTED_STATUS
433 fprintf (f, "exit=%u\n", EXPECTED_STATUS);
435 #ifdef EXPECTED_SIGNAL
436 switch (EXPECTED_SIGNAL)
439 # define init_sig(signo, name, text) \
440 case signo: fprintf (f, "signal=%s\n", name); break;
441 # include <siglist.h>
446 if (temp_name_list != NULL)
448 struct temp_name_list *n;
449 fprintf (f, "temp_files=(\n");
450 for (n = temp_name_list;
452 n = (struct temp_name_list *) n->q.q_forw)
453 fprintf (f, " '%s'\n", n->name);
461 /* If we are not expected to fork run the function immediately. */
463 return TEST_FUNCTION;
465 /* Set up the test environment:
468 - fork and execute the function. */
473 /* This is the child. */
475 /* Try to avoid dumping core. */
476 struct rlimit core_limit;
477 core_limit.rlim_cur = 0;
478 core_limit.rlim_max = 0;
479 setrlimit (RLIMIT_CORE, &core_limit);
482 /* We put the test process in its own pgrp so that if it bogusly
483 generates any job control signals, they won't hit the whole build. */
484 if (setpgid (0, 0) != 0)
485 printf ("Failed to set the process group ID: %m\n");
487 /* Execute the test function and exit with the return value. */
488 exit (TEST_FUNCTION);
492 printf ("Cannot fork test program: %m\n");
497 signal (SIGALRM, signal_handler);
498 alarm (TIMEOUT * timeoutfactor);
500 /* Make sure we clean up if the wrapper gets interrupted. */
501 signal (SIGINT, signal_handler);
503 /* Wait for the regular termination. */
504 termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
507 printf ("Waiting for test program failed: %m\n");
512 printf ("Oops, wrong test program terminated: expected %ld, got %ld\n",
513 (long int) pid, (long int) termpid);
517 /* Process terminated normaly without timeout etc. */
518 if (WIFEXITED (status))
520 #ifndef EXPECTED_STATUS
521 # ifndef EXPECTED_SIGNAL
522 /* Simply exit with the return value of the test. */
523 return WEXITSTATUS (status);
525 printf ("Expected signal '%s' from child, got none\n",
526 strsignal (EXPECTED_SIGNAL));
530 if (WEXITSTATUS (status) != EXPECTED_STATUS)
532 printf ("Expected status %d, got %d\n",
533 EXPECTED_STATUS, WEXITSTATUS (status));
540 /* Process was killed by timer or other signal. */
543 #ifndef EXPECTED_SIGNAL
544 printf ("Didn't expect signal from child: got `%s'\n",
545 strsignal (WTERMSIG (status)));
548 if (WTERMSIG (status) != EXPECTED_SIGNAL)
550 printf ("Incorrect signal from child: got `%s', need `%s'\n",
551 strsignal (WTERMSIG (status)),
552 strsignal (EXPECTED_SIGNAL));