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 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 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
