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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
	by child.
This commit is contained in:
Paul Pluzhnikov 2017-08-29 10:42:42 -07:00
parent 319cbbf633
commit 8325b477b1
2 changed files with 51 additions and 4 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2017-08-29 Paul Pluzhnikov <ppluzhnikov@google.com>
* stdlib/tst-atexit-common.c (do_test): Test handler inheritance
by child.
2017-08-29 Adhemerval Zanella <adhemerval.zanella@linaro.org>
Aurelien Jarno <aurelien@aurel32.net>
Maciej W. Rozycki <macro@imgtec.com>

50
stdlib/tst-atexit-common.c
View File

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