forked from OSchip/llvm-project
42 lines
810 B
C++
42 lines
810 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
|
|
#include "test.h"
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
int X;
|
|
|
|
void *Thread1(void *x) {
|
|
barrier_wait(&barrier);
|
|
int f = open("/dev/random", O_RDONLY);
|
|
char buf;
|
|
read(f, &buf, 1);
|
|
close(f);
|
|
X = 42;
|
|
return NULL;
|
|
}
|
|
|
|
void *Thread2(void *x) {
|
|
X = 43;
|
|
write(STDOUT_FILENO, "a", 1);
|
|
barrier_wait(&barrier);
|
|
return NULL;
|
|
}
|
|
|
|
int main() {
|
|
barrier_init(&barrier, 2);
|
|
pthread_t t[2];
|
|
pthread_create(&t[0], NULL, Thread1, NULL);
|
|
pthread_create(&t[1], NULL, Thread2, NULL);
|
|
pthread_join(t[0], NULL);
|
|
pthread_join(t[1], NULL);
|
|
}
|
|
|
|
// CHECK: WARNING: ThreadSanitizer: data race
|
|
// CHECK: Write of size 4
|
|
// CHECK: #0 Thread1
|
|
// CHECK: Previous write of size 4
|
|
// CHECK: #0 Thread2
|
|
|
|
|