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/* Copyright (C) 2005-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <tst-stack-align.h>
#include <unistd.h>
static int res, fds[2], result;
static bool test_destructors;
extern void in_dso (int *, bool *, int *);
static void __attribute__ ((constructor)) con (void)
{
res = TEST_STACK_ALIGN () ? -1 : 1;
}
static void __attribute__ ((destructor)) des (void)
{
if (!test_destructors)
return;
char c = TEST_STACK_ALIGN () ? 'B' : 'A';
write (fds[1], &c, 1);
}
static int
do_test (void)
{
if (!res)
{
puts ("binary's constructor has not been run");
result = 1;
}
else if (res != 1)
{
puts ("binary's constructor has been run without sufficient alignment");
result = 1;
}
if (TEST_STACK_ALIGN ())
{
puts ("insufficient stack alignment in do_test");
result = 1;
}
in_dso (&result, &test_destructors, &fds[1]);
if (pipe (fds) < 0)
{
printf ("couldn't create pipe: %m\n");
return 1;
}
pid_t pid = fork ();
if (pid < 0)
{
printf ("fork failed: %m\n");
return 1;
}
if (!pid)
{
close (fds[0]);
test_destructors = true;
exit (0);
}
close (fds[1]);
unsigned char c;
ssize_t len;
int des_seen = 0, dso_des_seen = 0;
while ((len = TEMP_FAILURE_RETRY (read (fds[0], &c, 1))) > 0)
{
switch (c)
{
case 'B':
puts ("insufficient alignment in binary's destructor");
result = 1;
/* FALLTHROUGH */
case 'A':
des_seen++;
break;
case 'D':
puts ("insufficient alignment in DSO destructor");
result = 1;
/* FALLTHROUGH */
case 'C':
dso_des_seen++;
break;
default:
printf ("unexpected character %x read from pipe", c);
result = 1;
break;
}
}
close (fds[0]);
if (des_seen != 1)
{
printf ("binary destructor run %d times instead of once\n", des_seen);
result = 1;
}
if (dso_des_seen != 1)
{
printf ("DSO destructor run %d times instead of once\n", dso_des_seen);
result = 1;
}
int status;
pid_t termpid;
termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
if (termpid == -1)
{
printf ("waitpid failed: %m\n");
result = 1;
}
else if (termpid != pid)
{
printf ("waitpid returned %ld != %ld\n",
(long int) termpid, (long int) pid);
result = 1;
}
else if (!WIFEXITED (status) || WEXITSTATUS (status))
{
puts ("child hasn't exited with exit status 0");
result = 1;
}
return result;
}
#include <support/test-driver.c>
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