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| // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
#include "test.h"
#include <errno.h>
#include <sys/mman.h>
void *SubWorker(void *arg) {
(void)arg;
const int kMmapSize = 65536;
for (int i = 0; i < 500; i++) {
int *ptr = (int*)mmap(0, kMmapSize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (ptr == MAP_FAILED)
exit(printf("mmap failed: %d\n", errno));
*ptr = 42;
if (munmap(ptr, kMmapSize))
exit(printf("munmap failed: %d\n", errno));
}
return 0;
}
void *Worker1(void *arg) {
(void)arg;
pthread_t th[4];
for (int i = 0; i < 4; i++) {
if (pthread_create(&th[i], 0, SubWorker, 0))
exit(printf("pthread_create failed: %d\n", errno));
}
for (int i = 0; i < 4; i++) {
if (pthread_join(th[i], 0))
exit(printf("pthread_join failed: %d\n", errno));
}
return 0;
}
void *Worker(void *arg) {
(void)arg;
pthread_t th[4];
for (int i = 0; i < 4; i++) {
if (pthread_create(&th[i], 0, Worker1, 0))
exit(printf("pthread_create failed: %d\n", errno));
}
for (int i = 0; i < 4; i++) {
if (pthread_join(th[i], 0))
exit(printf("pthread_join failed: %d\n", errno));
}
return 0;
}
int main() {
// This test is flaky on several builders:
// https://groups.google.com/d/msg/llvm-dev/KUFPdLhBN3Q/L75rwW9xBgAJ
// The cause is unknown (lit hides test output on failures).
#if 0
pthread_t th[4];
for (int i = 0; i < 4; i++) {
if (pthread_create(&th[i], 0, Worker, 0))
exit(printf("pthread_create failed: %d\n", errno));
}
for (int i = 0; i < 4; i++) {
if (pthread_join(th[i], 0))
exit(printf("pthread_join failed: %d\n", errno));
}
#endif
fprintf(stderr, "DONE\n");
}
// CHECK: DONE
|