llvm-project/compiler-rt/test/tsan/getline_nohang.cc

36 lines
885 B
C++

// RUN: %clangxx_tsan -O1 %s -o %t && %t
// Make sure TSan doesn't deadlock on a file stream lock at program shutdown.
// See https://code.google.com/p/thread-sanitizer/issues/detail?id=47
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
void *thread(void *unused) {
char *line = NULL;
size_t size;
int fd[2];
pipe(fd);
// Forge a non-standard stream to make sure it's not closed.
FILE *stream = fdopen(fd[0], "r");
while (1) {
volatile int res = getline(&line, &size, stream);
(void)res;
}
return NULL;
}
int main() {
pthread_t t;
pthread_attr_t a;
pthread_attr_init(&a);
pthread_attr_setdetachstate(&a, PTHREAD_CREATE_DETACHED);
pthread_create(&t, &a, thread, NULL);
pthread_attr_destroy(&a);
fprintf(stderr, "DONE\n");
return 0;
// ThreadSanitizer used to hang here because of a deadlock on a file stream.
}
// CHECK: DONE