glibc/tests/Regression/bz529997-sem_timedwait-with-invalid-time/newrepr.c

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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <semaphore.h>
#include <pthread.h>
#include <unistd.h>
//#define TST_TEST_MODE 1
#define __HAVE_64B_ATOMICS 1
/* Semaphore variable structure. */
// taken from nptl/sysdeps/unix/sysv/linux/internaltypes.h
struct new_sem
{
#if __HAVE_64B_ATOMICS
/* The data field holds both value (in the least-significant 32 bytes) and
nwaiters. */
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define SEM_VALUE_OFFSET 0
# elif __BYTE_ORDER == __BIG_ENDIAN
# define SEM_VALUE_OFFSET 1
# else
# error Unsupported byte order.
# endif
# define SEM_NWAITERS_SHIFT 32
# define SEM_VALUE_MASK (~(unsigned int)0)
unsigned long int data;
int private;
int pad;
#else
# define SEM_VALUE_SHIFT 1
# define SEM_NWAITERS_MASK ((unsigned int)1)
unsigned int value;
int private;
int pad;
unsigned int nwaiters;
#endif
};
#if TST_TEST_MODE
void func(sem_t *semp) {
struct timespec ts1 = {10, 1};
struct timespec ts2 = {10, 1};
struct timespec ts3 = {10, 1};
printf("Starting thread\n");
if (sem_post(semp) == -1) {
printf("sem_post error\n");
sem_timedwait(semp, &ts1);
}
if (sem_post(semp) == -1) {
printf("sem_post error\n");
sem_timedwait(semp, &ts2);
}
if (sem_timedwait(semp, &ts3) < 0)
printf("THREAD ERR: sem_timedwait() failed (errno=%d: %s)\n", errno, strerror(errno));
sleep(10);
printf("Finishing thread\n");
}
#endif
int main(void)
{
#if TST_TEST_MODE
pthread_t thread1,thread2,thread3;
struct timespec ts = {10, 1}; // set incorrect nanoseconds
#else
struct timespec ts = {0, -1}; // set incorrect nanoseconds
#endif
sem_t sem;
struct new_sem *isem = (struct new_sem *)&sem;
sem_init(&sem, 0, 0);
#if TST_TEST_MODE
pthread_create(&thread1, NULL, (void *)&func, (void *)&sem);
sleep(1);
pthread_create(&thread2, NULL, (void *)&func, (void *)&sem);
sleep(1);
pthread_create(&thread3, NULL, (void *)&func, (void *)&sem);
sleep(1);
#endif
unsigned int *pres;
pres=(unsigned int*) &isem->data;
printf("before sem_timedwait(): new_sem->nwaiters = 0x%x\n", *pres );
if (sem_timedwait(&sem, &ts) < 0)
printf("ERR: sem_timedwait() failed (errno=%d: %s)\n", errno, strerror(errno));
pres=(unsigned int*) &isem->data;
printf("after sem_timedwait(): new_sem->nwaiters = 0x%x\n", *pres );
return 0;
}