47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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// The test tries to provoke internal allocator to be locked during fork
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// and then force the child process to use the internal allocator.
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#include "../test.h"
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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static void *forker(void *arg) {
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void *p = calloc(1, 16);
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static_cast<volatile int *>(p)[0]++;
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__atomic_fetch_add(static_cast<int *>(p), 1, __ATOMIC_SEQ_CST);
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int pid = fork();
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if (pid < 0) {
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fprintf(stderr, "failed to fork (%d)\n", errno);
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exit(1);
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}
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if (pid == 0) {
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__atomic_fetch_add(&static_cast<int *>(p)[1], 1, __ATOMIC_SEQ_CST);
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exit(0);
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}
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int status = 0;
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while (waitpid(pid, &status, 0) != pid) {
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}
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
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fprintf(stderr, "subprocess failed (%d)\n", status);
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exit(1);
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}
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free(p);
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return 0;
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}
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int main() {
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for (int i = 0; i < 10; i++) {
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pthread_t threads[100];
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for (auto &th : threads)
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pthread_create(&th, 0, forker, 0);
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for (auto th : threads)
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pthread_join(th, 0);
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}
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fprintf(stderr, "DONE\n");
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}
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// CHECK: DONE
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