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2017-08-29 Paul Pluzhnikov <ppluzhnikov@google.com>
* stdlib/tst-atexit-common.c (do_test): Test handler inheritance by child.
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@ -1,3 +1,8 @@
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2017-08-29 Paul Pluzhnikov <ppluzhnikov@google.com>
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* stdlib/tst-atexit-common.c (do_test): Test handler inheritance
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by child.
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2017-08-29 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Aurelien Jarno <aurelien@aurel32.net>
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Maciej W. Rozycki <macro@imgtec.com>
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@ -21,11 +21,20 @@
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#define MAX_ATEXIT 20 /* Large enough for current set of invocations. */
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static char crumbs[MAX_ATEXIT];
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static int next_slot = 0;
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/* Helper: flush stdout and _exit. */
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static void
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_exit_with_flush (int code)
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{
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fflush (stdout);
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_exit (code);
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}
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static void
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fn0 (void)
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{
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@ -60,11 +69,11 @@ fn_final (void)
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const char expected[] = "3021121130211";
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if (strcmp (crumbs, expected) == 0)
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_exit (0);
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_exit_with_flush (0);
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printf ("crumbs: %s\n", crumbs);
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printf ("expected: %s\n", expected);
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_exit (1);
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_exit_with_flush (1);
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}
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/* This is currently just a basic test to verify that exit handlers execute
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@ -72,8 +81,7 @@ fn_final (void)
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TODO: Additional tests that we should do:
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1. POSIX says we need to support at least ATEXIT_MAX
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2. Verify that fork'd child inherit the registrations of the parent.
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3. ... */
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2. ... */
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static int
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do_test (void)
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@ -88,6 +96,40 @@ do_test (void)
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ATEXIT (fn1);
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ATEXIT (fn3);
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/* Verify that handlers registered above are inherited across fork. */
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const pid_t child = fork ();
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switch (child)
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{
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case -1:
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printf ("fork: %m\n");
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_exit_with_flush (3);
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case 0: /* Child. */
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break;
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default:
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{
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int status;
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const pid_t exited = waitpid (child, &status, 0);
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if (child != exited)
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{
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printf ("unexpected child: %d, expected %d\n", exited, child);
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_exit_with_flush (4);
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}
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if (status != 0)
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{
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if (WIFEXITED (status))
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printf ("unexpected exit status %d from child %d\n",
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WEXITSTATUS (status), child);
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else if (WIFSIGNALED (status))
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printf ("unexpected signal %d from child %d\n",
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WTERMSIG (status), child);
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else
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printf ("unexpected status %d from child %d\n", status, child);
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_exit_with_flush (5);
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}
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}
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break;
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}
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EXIT (2); /* If we see this exit code, fn_final must have not worked. */
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}
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