| // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
| #include "test.h" |
| #include <errno.h> |
| #include <sys/mman.h> |
| |
| void *SubWorker(void *arg) { |
| (void)arg; |
| const int kMmapSize = 65536; |
| for (int i = 0; i < 500; i++) { |
| int *ptr = (int*)mmap(0, kMmapSize, PROT_READ | PROT_WRITE, |
| MAP_PRIVATE | MAP_ANON, -1, 0); |
| if (ptr == MAP_FAILED) |
| exit(printf("mmap failed: %d\n", errno)); |
| *ptr = 42; |
| if (munmap(ptr, kMmapSize)) |
| exit(printf("munmap failed: %d\n", errno)); |
| } |
| return 0; |
| } |
| |
| void *Worker1(void *arg) { |
| (void)arg; |
| pthread_t th[4]; |
| for (int i = 0; i < 4; i++) { |
| if (pthread_create(&th[i], 0, SubWorker, 0)) |
| exit(printf("pthread_create failed: %d\n", errno)); |
| } |
| for (int i = 0; i < 4; i++) { |
| if (pthread_join(th[i], 0)) |
| exit(printf("pthread_join failed: %d\n", errno)); |
| } |
| return 0; |
| } |
| |
| void *Worker(void *arg) { |
| (void)arg; |
| pthread_t th[4]; |
| for (int i = 0; i < 4; i++) { |
| if (pthread_create(&th[i], 0, Worker1, 0)) |
| exit(printf("pthread_create failed: %d\n", errno)); |
| } |
| for (int i = 0; i < 4; i++) { |
| if (pthread_join(th[i], 0)) |
| exit(printf("pthread_join failed: %d\n", errno)); |
| } |
| return 0; |
| } |
| |
| int main() { |
| // This test is flaky on several builders: |
| // https://groups.google.com/d/msg/llvm-dev/KUFPdLhBN3Q/L75rwW9xBgAJ |
| // The cause is unknown (lit hides test output on failures). |
| #if 0 |
| pthread_t th[4]; |
| for (int i = 0; i < 4; i++) { |
| if (pthread_create(&th[i], 0, Worker, 0)) |
| exit(printf("pthread_create failed: %d\n", errno)); |
| } |
| for (int i = 0; i < 4; i++) { |
| if (pthread_join(th[i], 0)) |
| exit(printf("pthread_join failed: %d\n", errno)); |
| } |
| #endif |
| fprintf(stderr, "DONE\n"); |
| } |
| |
| // CHECK: DONE |