Kaido Kert | 788710a | 2023-06-05 07:50:22 -0700 | [diff] [blame] | 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: target=mips{{.*}} |
| 12 | // XFAIL: target=aarch64{{.*}} |
| 13 | // XFAIL: target=powerpc64{{.*}} |
| 14 | // XFAIL: target=s390x{{.*}} |
| 15 | // XFAIL: target=loongarch64{{.*}} |
| 16 | |
| 17 | // MAP_32BIT doesn't exist on OS X and NetBSD. |
| 18 | // UNSUPPORTED: darwin,target={{.*netbsd.*}} |
| 19 | |
| 20 | void *Thread(void *ptr) { |
| 21 | *(int*)ptr = 42; |
| 22 | barrier_wait(&barrier); |
| 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | int main() { |
| 27 | barrier_init(&barrier, 2); |
| 28 | void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE, |
| 29 | MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
| 30 | fprintf(stderr, "ptr=%p\n", ptr); |
| 31 | if (ptr == MAP_FAILED) { |
| 32 | fprintf(stderr, "mmap failed: %d\n", errno); |
| 33 | return 1; |
| 34 | } |
| 35 | if ((uintptr_t)ptr >= (1ull << 32)) { |
| 36 | fprintf(stderr, "ptr is too high\n"); |
| 37 | return 1; |
| 38 | } |
| 39 | pthread_t t; |
| 40 | pthread_create(&t, 0, Thread, ptr); |
| 41 | barrier_wait(&barrier); |
| 42 | *(int*)ptr = 42; |
| 43 | pthread_join(t, 0); |
| 44 | munmap(ptr, 128 << 10); |
| 45 | fprintf(stderr, "DONE\n"); |
| 46 | } |
| 47 | |
| 48 | // CHECK: WARNING: ThreadSanitizer: data race |
| 49 | // CHECK: DONE |