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// Simple stress test for of pthread_create. Increase arg to use as benchmark.
// RUN: %clangxx -O3 -pthread %s -o %t && %run %t 10
#include <cstdint>
#include <pthread.h>
#include <stdlib.h>
extern "C" const char *__asan_default_options() {
// 32bit asan can allocate just a few FakeStacks.
return sizeof(void *) < 8 ? "detect_stack_use_after_return=0" : "";
}
static void *null_func(void *args) { return nullptr; }
static void *loop(void *args) {
uintptr_t n = (uintptr_t)args;
for (int i = 0; i < n; ++i) {
pthread_t thread;
if (pthread_create(&thread, 0, null_func, nullptr) == 0)
pthread_detach(thread);
}
return nullptr;
}
int main(int argc, char **argv) {
uintptr_t n = atoi(argv[1]);
pthread_t threads[64];
for (auto &thread : threads)
while (pthread_create(&thread, 0, loop, (void *)n) != 0) {
}
for (auto &thread : threads)
pthread_join(thread, nullptr);
return 0;
}
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