48 lines · c
1// RUN: %clang_tsan -O1 %s -o %t2// RUN: %deflake %run %t | FileCheck %s --check-prefix=CHECK-NOZUPP3// RUN: %env_tsan_opts=suppressions='%s.supp':print_suppressions=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUPP4 5#include "test.h"6 7int *mem;8pthread_mutex_t mtx;9 10void *Thread1(void *x) {11 pthread_mutex_lock(&mtx);12 free(mem);13 pthread_mutex_unlock(&mtx);14 barrier_wait(&barrier);15 return NULL;16}17 18__attribute__((noinline)) void *Thread2(void *x) {19 barrier_wait(&barrier);20 pthread_mutex_lock(&mtx);21 mem[0] = 42;22 pthread_mutex_unlock(&mtx);23 return NULL;24}25 26int main() {27 barrier_init(&barrier, 2);28 mem = (int*)malloc(100);29 pthread_mutex_init(&mtx, 0);30 pthread_t t;31 pthread_create(&t, NULL, Thread1, NULL);32 Thread2(0);33 pthread_join(t, NULL);34 pthread_mutex_destroy(&mtx);35 return 0;36}37 38// CHECK-NOZUPP: WARNING: ThreadSanitizer: heap-use-after-free39// CHECK-NOZUPP: Write of size 4 at {{.*}} by main thread{{.*}}:40// CHECK-NOZUPP: #0 Thread241// CHECK-NOZUPP: #1 main42// CHECK-NOZUPP: Previous write of size 8 at {{.*}} by thread T1{{.*}}:43// CHECK-NOZUPP: #0 free44// CHECK-NOZUPP: #{{(1|2)}} Thread145// CHECK-NOZUPP: SUMMARY: ThreadSanitizer: heap-use-after-free{{.*}}Thread246// CHECK-SUPP: ThreadSanitizer: Matched 1 suppressions47// CHECK-SUPP: 1 race:^Thread2$48