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glibc/elf/tst-align2.c
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/* Copyright (C) 2005-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Jakub Jelinek <jakub@redhat.com>, 2005. | |
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 <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; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |