compiler-rt/test/lsan/TestCases/many_threads_detach.cpp

   1 // Test that threads are reused.
   2 // On Android, pthread_* are in libc.so. So the `-lpthread` is not supported.
   3 // Use `-pthread` so that its driver will DTRT (ie., ignore it).
   4 // RUN: %clangxx_lsan %s -o %t -pthread && %run %t
   5
   6 #include <assert.h>
   7 #include <dirent.h>
   8 #include <pthread.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11
  12 // Number of threads to create. This value is greater than kMaxThreads in
  13 // lsan_thread.cpp so that we can test that thread contexts are not being
  14 // reused.
  15 static const size_t kTestThreads = 10000;
  16
  17 // Limit the number of simultaneous threads to avoid reaching the limit.
  18 static const size_t kTestThreadsBatch = 100;
  19
  20 void *null_func(void *args) {
  21   return NULL;
  22 }
  23
  24 int main(void) {
  25   for (size_t i = 0; i < kTestThreads; i += kTestThreadsBatch) {
  26     pthread_t thread[kTestThreadsBatch];
  27     for (size_t j = 0; j < kTestThreadsBatch; ++j)
  28       assert(pthread_create(&thread[j], NULL, null_func, NULL) == 0);
  29
  30     for (size_t j = 0; j < kTestThreadsBatch; ++j)
  31       assert(pthread_join(thread[j], NULL) == 0);
  32   }
  33   return 0;
  34 }