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#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <setjmp.h>
#define TEST2(c, l, ...) ((c) ? 1 : \
(err++,printf(__FILE__":"#l": "#c" failed: " __VA_ARGS__),putchar('\n'),0))
#define TEST1(c, l, ...) TEST2(c, l, __VA_ARGS__)
#define TEST(c, ...) TEST1(c, __LINE__, __VA_ARGS__)
#define TESTE(c) TEST(c, "errno = %s", strerror(errno))
int test_setjmp(void)
{
volatile int err = 0;
volatile int x = 0, r;
jmp_buf jb;
sigjmp_buf sjb;
volatile sigset_t oldset;
sigset_t set;
if (!setjmp(jb)) {
x = 1;
longjmp(jb, 1);
}
TEST(x==1, "setjmp/longjmp seems to have been bypassed");
x = 0;
r = setjmp(jb);
if (!x) {
x = 1;
longjmp(jb, 0);
}
TEST(r==1, "longjmp(jb, 0) caused setjmp to return %d", r);
sigemptyset(&set);
sigaddset(&set, SIGUSR1);
sigprocmask(SIG_UNBLOCK, &set, &set);
oldset = set;
/* Improve the chances of catching failure of sigsetjmp to
* properly save the signal mask in the sigjmb_buf. */
memset(&sjb, -1, sizeof sjb);
if (!sigsetjmp(sjb, 1)) {
sigemptyset(&set);
sigaddset(&set, SIGUSR1);
sigprocmask(SIG_BLOCK, &set, 0);
siglongjmp(sjb, 1);
}
set = oldset;
sigprocmask(SIG_SETMASK, &set, &set);
TEST(sigismember(&set, SIGUSR1)==0, "siglongjmp failed to restore mask");
return err;
}
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