1//===- llvm/unittest/Support/ManagedStatic.cpp - ManagedStatic tests ------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#include "llvm/Support/ManagedStatic.h"
10#include "llvm/Config/config.h"
11#include "llvm/Support/Threading.h"
12#ifdef HAVE_PTHREAD_H
13#include <pthread.h>
14#endif
15
16#include "gtest/gtest.h"
17
18using namespace llvm;
19
20namespace {
21
22#if LLVM_ENABLE_THREADS != 0 && defined(HAVE_PTHREAD_H) && \
23  !__has_feature(memory_sanitizer)
24namespace test1 {
25  llvm::ManagedStatic<int> ms;
26  void *helper(void*) {
27    *ms;
28    return nullptr;
29  }
30
31  // Valgrind's leak checker complains glibc's stack allocation.
32  // To appease valgrind, we provide our own stack for each thread.
33  void *allocate_stack(pthread_attr_t &a, size_t n = 65536) {
34    void *stack = malloc(n);
35    pthread_attr_init(&a);
36#if defined(__linux__)
37    pthread_attr_setstack(&a, stack, n);
38#endif
39    return stack;
40  }
41}
42
43TEST(Initialize, MultipleThreads) {
44  // Run this test under tsan: http://code.google.com/p/data-race-test/
45
46  pthread_attr_t a1, a2;
47  void *p1 = test1::allocate_stack(a1);
48  void *p2 = test1::allocate_stack(a2);
49
50  pthread_t t1, t2;
51  pthread_create(&t1, &a1, test1::helper, nullptr);
52  pthread_create(&t2, &a2, test1::helper, nullptr);
53  pthread_join(t1, nullptr);
54  pthread_join(t2, nullptr);
55  free(p1);
56  free(p2);
57}
58#endif
59
60} // anonymous namespace
61