1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s 2 #include "test.h" 3 #include <stdint.h> 4 #include <errno.h> 5 #include <sys/mman.h> 6 7 // Test for issue: 8 // https://github.com/google/sanitizers/issues/412 9 10 // MAP_32BIT flag for mmap is supported only for x86_64. 11 // XFAIL: mips64 12 // XFAIL: aarch64 13 // XFAIL: powerpc64 14 15 // MAP_32BIT doesn't exist on OS X. 16 // UNSUPPORTED: darwin 17 18 void *Thread(void *ptr) { 19 *(int*)ptr = 42; 20 barrier_wait(&barrier); 21 return 0; 22 } 23 24 int main() { 25 barrier_init(&barrier, 2); 26 void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE, 27 MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); 28 fprintf(stderr, "ptr=%p\n", ptr); 29 if (ptr == MAP_FAILED) { 30 fprintf(stderr, "mmap failed: %d\n", errno); 31 return 1; 32 } 33 if ((uintptr_t)ptr >= (1ull << 32)) { 34 fprintf(stderr, "ptr is too high\n"); 35 return 1; 36 } 37 pthread_t t; 38 pthread_create(&t, 0, Thread, ptr); 39 barrier_wait(&barrier); 40 *(int*)ptr = 42; 41 pthread_join(t, 0); 42 munmap(ptr, 128 << 10); 43 fprintf(stderr, "DONE\n"); 44 } 45 46 // CHECK: WARNING: ThreadSanitizer: data race 47 // CHECK: DONE 48 49
