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// RUN: %clang_tsan -O1 %s -o %t
// RUN: %deflake %run %t | FileCheck %s --check-prefix=CHECK-NOZUPP
// RUN: TSAN_OPTIONS="suppressions=%s.supp print_suppressions=1" %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUPP
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
int *mem;
pthread_mutex_t mtx;
void *Thread1(void *x) {
pthread_mutex_lock(&mtx);
free(mem);
pthread_mutex_unlock(&mtx);
return NULL;
}
void *Thread2(void *x) {
sleep(1);
pthread_mutex_lock(&mtx);
mem[0] = 42;
pthread_mutex_unlock(&mtx);
return NULL;
}
int main() {
mem = (int*)malloc(100);
pthread_mutex_init(&mtx, 0);
pthread_t t;
pthread_create(&t, NULL, Thread1, NULL);
Thread2(0);
pthread_join(t, NULL);
pthread_mutex_destroy(&mtx);
return 0;
}
// CHECK-NOZUPP: WARNING: ThreadSanitizer: heap-use-after-free
// CHECK-NOZUPP: Write of size 4 at {{.*}} by main thread{{.*}}:
// CHECK-NOZUPP: #0 Thread2
// CHECK-NOZUPP: #1 main
// CHECK-NOZUPP: Previous write of size 8 at {{.*}} by thread T1{{.*}}:
// CHECK-NOZUPP: #0 free
// CHECK-NOZUPP: #{{(1|2)}} Thread1
// CHECK-NOZUPP: SUMMARY: ThreadSanitizer: heap-use-after-free{{.*}}Thread2
// CHECK-SUPP: ThreadSanitizer: Matched 1 suppressions
// CHECK-SUPP: 1 race:^Thread2$
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