forked from OSchip/llvm-project
48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
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// 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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*ptr = 42;
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munmap(ptr, kMmapSize);
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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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pthread_create(&th[i], 0, SubWorker, 0);
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for (int i = 0; i < 4; i++)
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pthread_join(th[i], 0);
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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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pthread_create(&th[i], 0, Worker1, 0);
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for (int i = 0; i < 4; i++)
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pthread_join(th[i], 0);
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return 0;
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}
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int main() {
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pthread_t th[4];
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for (int i = 0; i < 4; i++)
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pthread_create(&th[i], 0, Worker, 0);
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for (int i = 0; i < 4; i++)
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pthread_join(th[i], 0);
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fprintf(stderr, "DONE\n");
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}
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// CHECK: DONE
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