| // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
| |
| // The test tries to provoke internal allocator to be locked during fork |
| // and then force the child process to use the internal allocator. |
| |
| #include "../test.h" |
| #include <errno.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| |
| static void *forker(void *arg) { |
| void *p = calloc(1, 16); |
| static_cast<volatile int *>(p)[0]++; |
| __atomic_fetch_add(static_cast<int *>(p), 1, __ATOMIC_SEQ_CST); |
| int pid = fork(); |
| if (pid < 0) { |
| fprintf(stderr, "failed to fork (%d)\n", errno); |
| exit(1); |
| } |
| if (pid == 0) { |
| __atomic_fetch_add(&static_cast<int *>(p)[1], 1, __ATOMIC_SEQ_CST); |
| exit(0); |
| } |
| int status = 0; |
| while (waitpid(pid, &status, 0) != pid) { |
| } |
| if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { |
| fprintf(stderr, "subprocess failed (%d)\n", status); |
| exit(1); |
| } |
| free(p); |
| return 0; |
| } |
| |
| int main() { |
| for (int i = 0; i < 10; i++) { |
| pthread_t threads[100]; |
| for (auto &th : threads) |
| pthread_create(&th, 0, forker, 0); |
| for (auto th : threads) |
| pthread_join(th, 0); |
| } |
| fprintf(stderr, "DONE\n"); |
| } |
| |
| // CHECK: DONE |