40 lines · cpp
1// Simple stress test for of pthread_create. Increase arg to use as benchmark.2 3// RUN: %clangxx -O3 -pthread %s -o %t && %run %t 104 5// Crashes on Android.6// UNSUPPORTED: android7 8#include <cstdint>9#include <pthread.h>10#include <stdlib.h>11 12extern "C" const char *__asan_default_options() {13 // 32bit asan can allocate just a few FakeStacks.14 return sizeof(void *) < 8 ? "detect_stack_use_after_return=0" : "";15}16 17static void *null_func(void *args) { return nullptr; }18 19static void *loop(void *args) {20 uintptr_t n = (uintptr_t)args;21 for (int i = 0; i < n; ++i) {22 pthread_t thread;23 if (pthread_create(&thread, 0, null_func, nullptr) == 0)24 pthread_detach(thread);25 }26 return nullptr;27}28 29int main(int argc, char **argv) {30 uintptr_t n = atoi(argv[1]);31 pthread_t threads[64];32 for (auto &thread : threads)33 while (pthread_create(&thread, 0, loop, (void *)n) != 0) {34 }35 36 for (auto &thread : threads)37 pthread_join(thread, nullptr);38 return 0;39}40