| // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s |
| #include "test.h" |
| #include <stdint.h> |
| #include <errno.h> |
| #include <sys/mman.h> |
| |
| // Test for issue: |
| // https://github.com/google/sanitizers/issues/412 |
| |
| // MAP_32BIT flag for mmap is supported only for x86_64. |
| // XFAIL: target=mips{{.*}} |
| // XFAIL: target=aarch64{{.*}} |
| // XFAIL: target=powerpc64{{.*}} |
| // XFAIL: target=s390x{{.*}} |
| // XFAIL: target=loongarch64{{.*}} |
| |
| // MAP_32BIT doesn't exist on OS X and NetBSD. |
| // UNSUPPORTED: darwin,target={{.*netbsd.*}} |
| |
| void *Thread(void *ptr) { |
| *(int*)ptr = 42; |
| barrier_wait(&barrier); |
| return 0; |
| } |
| |
| int main() { |
| barrier_init(&barrier, 2); |
| void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE, |
| MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
| fprintf(stderr, "ptr=%p\n", ptr); |
| if (ptr == MAP_FAILED) { |
| fprintf(stderr, "mmap failed: %d\n", errno); |
| return 1; |
| } |
| if ((uintptr_t)ptr >= (1ull << 32)) { |
| fprintf(stderr, "ptr is too high\n"); |
| return 1; |
| } |
| pthread_t t; |
| pthread_create(&t, 0, Thread, ptr); |
| barrier_wait(&barrier); |
| *(int*)ptr = 42; |
| pthread_join(t, 0); |
| munmap(ptr, 128 << 10); |
| fprintf(stderr, "DONE\n"); |
| } |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK: DONE |