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