1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
//===-- mutex_test.cpp ------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "tests/scudo_unit_test.h"
#include "mutex.h"
#include <pthread.h>
#include <string.h>
class TestData {
public:
explicit TestData(scudo::HybridMutex &M) : Mutex(M) {
for (scudo::u32 I = 0; I < Size; I++)
Data[I] = 0;
}
void write() {
scudo::ScopedLock L(Mutex);
T V0 = Data[0];
for (scudo::u32 I = 0; I < Size; I++) {
EXPECT_EQ(Data[I], V0);
Data[I]++;
}
}
void tryWrite() {
if (!Mutex.tryLock())
return;
T V0 = Data[0];
for (scudo::u32 I = 0; I < Size; I++) {
EXPECT_EQ(Data[I], V0);
Data[I]++;
}
Mutex.unlock();
}
void backoff() {
volatile T LocalData[Size] = {};
for (scudo::u32 I = 0; I < Size; I++) {
LocalData[I] = LocalData[I] + 1;
EXPECT_EQ(LocalData[I], 1U);
}
}
private:
static const scudo::u32 Size = 64U;
typedef scudo::u64 T;
scudo::HybridMutex &Mutex;
alignas(SCUDO_CACHE_LINE_SIZE) T Data[Size];
};
const scudo::u32 NumberOfThreads = 8;
#if SCUDO_DEBUG
const scudo::u32 NumberOfIterations = 4 * 1024;
#else
const scudo::u32 NumberOfIterations = 16 * 1024;
#endif
static void *lockThread(void *Param) {
TestData *Data = reinterpret_cast<TestData *>(Param);
for (scudo::u32 I = 0; I < NumberOfIterations; I++) {
Data->write();
Data->backoff();
}
return 0;
}
static void *tryThread(void *Param) {
TestData *Data = reinterpret_cast<TestData *>(Param);
for (scudo::u32 I = 0; I < NumberOfIterations; I++) {
Data->tryWrite();
Data->backoff();
}
return 0;
}
TEST(ScudoMutexTest, Mutex) {
scudo::HybridMutex M;
TestData Data(M);
pthread_t Threads[NumberOfThreads];
for (scudo::u32 I = 0; I < NumberOfThreads; I++)
pthread_create(&Threads[I], 0, lockThread, &Data);
for (scudo::u32 I = 0; I < NumberOfThreads; I++)
pthread_join(Threads[I], 0);
}
TEST(ScudoMutexTest, MutexTry) {
scudo::HybridMutex M;
TestData Data(M);
pthread_t Threads[NumberOfThreads];
for (scudo::u32 I = 0; I < NumberOfThreads; I++)
pthread_create(&Threads[I], 0, tryThread, &Data);
for (scudo::u32 I = 0; I < NumberOfThreads; I++)
pthread_join(Threads[I], 0);
}
|
