47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
// Test that threads are reused.
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// On Android, pthread_* are in libc.so. So the `-lpthread` is not supported.
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// Use `-pthread` so that its driver will DTRT (ie., ignore it).
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// RUN: %clangxx_lsan %s -o %t -pthread && %run %t
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#include <assert.h>
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#include <dirent.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <unistd.h>
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// Number of threads to create. This value is greater than kMaxThreads in
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// lsan_thread.cpp so that we can test that thread contexts are not being
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// reused.
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static const size_t kTestThreads = 10000;
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// Limit the number of simultaneous threads to avoid reaching the limit.
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static const size_t kTestThreadsBatch = 100;
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void *null_func(void *args) {
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return NULL;
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}
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int count_threads() {
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DIR *d = opendir("/proc/self/task");
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assert(d);
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int count = 0;
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while (readdir(d))
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++count;
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closedir(d);
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assert(count);
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return count;
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}
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int main(void) {
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for (size_t i = 0; i < kTestThreads; i += kTestThreadsBatch) {
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for (size_t j = 0; j < kTestThreadsBatch; ++j) {
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pthread_t thread;
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assert(pthread_create(&thread, NULL, null_func, NULL) == 0);
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pthread_detach(thread);
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}
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while (count_threads() > 10)
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sched_yield();
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}
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return 0;
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}
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