1 //===-- tsan_thread.cpp ---------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file is a part of ThreadSanitizer (TSan), a race detector.
10 //
11 //===----------------------------------------------------------------------===//
12 #include "tsan_test_util.h"
13 #include "gtest/gtest.h"
14 
15 TEST(ThreadSanitizer, ThreadSync) {
16   MainThread t0;
17   MemLoc l;
18   t0.Write1(l);
19   {
20     ScopedThread t1;
21     t1.Write1(l);
22   }
23   t0.Write1(l);
24 }
25 
26 TEST(ThreadSanitizer, ThreadDetach1) {
27   ScopedThread t1(true);
28   MemLoc l;
29   t1.Write1(l);
30 }
31 
32 TEST(ThreadSanitizer, ThreadDetach2) {
33   ScopedThread t1;
34   MemLoc l;
35   t1.Write1(l);
36   t1.Detach();
37 }
38 
39 static void *thread_alot_func(void *arg) {
40   (void)arg;
41   int usleep(unsigned);
42   usleep(50);
43   return 0;
44 }
45 
46 TEST(DISABLED_SLOW_ThreadSanitizer, ThreadALot) {
47   const int kThreads = 70000;
48   const int kAlive = 1000;
49   pthread_t threads[kAlive] = {};
50   for (int i = 0; i < kThreads; i++) {
51     if (threads[i % kAlive])
52       pthread_join(threads[i % kAlive], 0);
53     pthread_create(&threads[i % kAlive], 0, thread_alot_func, 0);
54   }
55   for (int i = 0; i < kAlive; i++) {
56     pthread_join(threads[i], 0);
57   }
58 }
59