| 1 | // Simple stress test for of pthread_create. Increase arg to use as benchmark. |
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| 2 | |
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| 3 | // RUN: %clangxx -O3 -pthread %s -o %t && %run %t 10 |
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| 4 | |
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| 5 | // Crashes on Android. |
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| 6 | // UNSUPPORTED: android |
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| 7 | |
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| 8 | #include <cstdint> |
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| 9 | #include <pthread.h> |
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| 10 | #include <stdlib.h> |
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| 11 | |
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| 12 | extern "C" const char *__asan_default_options() { |
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| 13 | // 32bit asan can allocate just a few FakeStacks. |
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| 14 | return sizeof(void *) < 8 ? "detect_stack_use_after_return=0" : "" ; |
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| 15 | } |
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| 16 | |
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| 17 | static void *null_func(void *args) { return nullptr; } |
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| 18 | |
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| 19 | static void *loop(void *args) { |
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| 20 | uintptr_t n = (uintptr_t)args; |
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| 21 | for (int i = 0; i < n; ++i) { |
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| 22 | pthread_t thread; |
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| 23 | if (pthread_create(newthread: &thread, attr: 0, start_routine: null_func, arg: nullptr) == 0) |
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| 24 | pthread_detach(th: thread); |
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| 25 | } |
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| 26 | return nullptr; |
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| 27 | } |
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| 28 | |
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| 29 | int main(int argc, char **argv) { |
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| 30 | uintptr_t n = atoi(nptr: argv[1]); |
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| 31 | pthread_t threads[64]; |
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| 32 | for (auto &thread : threads) |
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| 33 | while (pthread_create(newthread: &thread, attr: 0, start_routine: loop, arg: (void *)n) != 0) { |
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| 34 | } |
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| 35 | |
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| 36 | for (auto &thread : threads) |
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| 37 | pthread_join(th: thread, thread_return: nullptr); |
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| 38 | return 0; |
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| 39 | } |
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| 40 | |
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