1 // RUN: %clangxx -O0 -g %s -lutil -o %t && %run %t
2 // This test depends on the glibc layout of struct sem_t and checks that we
3 // don't leave sem_t::private uninitialized.
4 // UNSUPPORTED: android
5 #include <features.h>
6 #include <assert.h>
7 #include <semaphore.h>
8 #include <string.h>
9 #include <stdint.h>
10
11 // This condition needs to correspond to __HAVE_64B_ATOMICS macro in glibc.
12 #if (defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__) || \
13 defined(__s390x__) || defined(__sparc64__) || defined(__alpha__) || \
14 defined(__ia64__) || defined(__m68k__)) && __GLIBC_PREREQ(2, 21)
15 typedef uint64_t semval_t;
16 #else
17 typedef unsigned semval_t;
18 #endif
19
my_sem_init(bool priv,int value,semval_t * a,unsigned char * b)20 void my_sem_init(bool priv, int value, semval_t *a, unsigned char *b) {
21 sem_t sem;
22 memset(&sem, 0xAB, sizeof(sem));
23 sem_init(&sem, priv, value);
24
25 char *p = (char *)&sem;
26 memcpy(a, p, sizeof(semval_t));
27 memcpy(b, p + sizeof(semval_t), sizeof(char));
28
29 sem_destroy(&sem);
30 }
31
main()32 int main() {
33 semval_t a;
34 unsigned char b;
35
36 my_sem_init(false, 42, &a, &b);
37 assert(a == 42);
38 assert(b != 0xAB);
39
40 my_sem_init(true, 43, &a, &b);
41 assert(a == 43);
42 assert(b != 0xAB);
43 }
44