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