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
18 using namespace llvm;
19
20 namespace {
21
22 #if LLVM_ENABLE_THREADS != 0 && defined(HAVE_PTHREAD_H) && \
23 !__has_feature(memory_sanitizer)
24 namespace test1 {
25 llvm::ManagedStatic<int> ms;
helper(void *)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.
allocate_stack(pthread_attr_t & a,size_t n=65536)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
TEST(Initialize,MultipleThreads)43 TEST(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