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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/multi_process_lock.h"
#include <memory>
#include "base/environment.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/process/kill.h"
#include "base/rand_util.h"
#include "base/strings/stringprintf.h"
#include "base/test/multiprocess_test.h"
#include "base/test/scoped_environment_variable_override.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "testing/multiprocess_func_list.h"
class MultiProcessLockTest : public base::MultiProcessTest {
public:
static const char kLockEnvironmentVarName[];
std::string GenerateLockName();
void ExpectLockIsLocked(const std::string &name);
void ExpectLockIsUnlocked(const std::string &name);
};
const char MultiProcessLockTest::kLockEnvironmentVarName[] =
"MULTI_PROCESS_TEST_LOCK_NAME";
std::string MultiProcessLockTest::GenerateLockName() {
base::Time now = base::Time::NowFromSystemTime();
return base::StringPrintf("multi_process_test_lock %lf%lf",
now.ToDoubleT(), base::RandDouble());
}
void MultiProcessLockTest::ExpectLockIsLocked(const std::string &name) {
base::test::ScopedEnvironmentVariableOverride var(kLockEnvironmentVarName,
name);
EXPECT_FALSE(var.WasSet());
base::Process process = SpawnChild("MultiProcessLockTryFailMain");
ASSERT_TRUE(process.IsValid());
int exit_code = -1;
EXPECT_TRUE(process.WaitForExit(&exit_code));
EXPECT_EQ(0, exit_code);
}
void MultiProcessLockTest::ExpectLockIsUnlocked(
const std::string &name) {
base::test::ScopedEnvironmentVariableOverride var(kLockEnvironmentVarName,
name);
EXPECT_FALSE(var.WasSet());
base::Process process = SpawnChild("MultiProcessLockTrySucceedMain");
ASSERT_TRUE(process.IsValid());
int exit_code = -1;
EXPECT_TRUE(process.WaitForExit(&exit_code));
EXPECT_EQ(0, exit_code);
}
TEST_F(MultiProcessLockTest, BasicCreationTest) {
// Test basic creation/destruction with no lock taken
std::string name = GenerateLockName();
std::unique_ptr<MultiProcessLock> scoped = MultiProcessLock::Create(name);
ExpectLockIsUnlocked(name);
scoped.reset(NULL);
}
TEST_F(MultiProcessLockTest, LongNameTest) {
// Every platform has has it's own max path name size,
// so different checks are needed for them.
// POSIX: sizeof(address.sun_path) - 2
// Mac OS X: BOOTSTRAP_MAX_NAME_LEN
// Windows: MAX_PATH
LOG(INFO) << "Following error log due to long name is expected";
#if defined(OS_MACOSX)
std::string name("This is a name that is longer than one hundred and "
"twenty-eight characters to make sure that we fail appropriately on "
"Mac OS X when we have a path that is too long for Mac OS X to handle");
#elif defined(OS_POSIX)
std::string name("This is a name that is longer than one hundred and eight "
"characters to make sure that we fail appropriately on POSIX systems "
"when we have a path that is too long for the system to handle");
#elif defined(OS_WIN)
std::string name("This is a name that is longer than two hundred and sixty "
"characters to make sure that we fail appropriately on Windows when we "
"have a path that is too long for Windows to handle "
"This limitation comes from the MAX_PATH definition which is obviously "
"defined to be a maximum of two hundred and sixty characters ");
#endif
std::unique_ptr<MultiProcessLock> test_lock = MultiProcessLock::Create(name);
EXPECT_FALSE(test_lock->TryLock());
}
TEST_F(MultiProcessLockTest, SimpleLock) {
std::string name = GenerateLockName();
std::unique_ptr<MultiProcessLock> test_lock = MultiProcessLock::Create(name);
EXPECT_TRUE(test_lock->TryLock());
ExpectLockIsLocked(name);
test_lock->Unlock();
ExpectLockIsUnlocked(name);
}
TEST_F(MultiProcessLockTest, RecursiveLock) {
std::string name = GenerateLockName();
std::unique_ptr<MultiProcessLock> test_lock = MultiProcessLock::Create(name);
EXPECT_TRUE(test_lock->TryLock());
ExpectLockIsLocked(name);
LOG(INFO) << "Following error log "
<< "'MultiProcessLock is already locked' is expected";
EXPECT_TRUE(test_lock->TryLock());
ExpectLockIsLocked(name);
test_lock->Unlock();
ExpectLockIsUnlocked(name);
LOG(INFO) << "Following error log "
<< "'Over-unlocked MultiProcessLock' is expected";
test_lock->Unlock();
ExpectLockIsUnlocked(name);
test_lock.reset();
}
TEST_F(MultiProcessLockTest, LockScope) {
// Check to see that lock is released when it goes out of scope.
std::string name = GenerateLockName();
{
std::unique_ptr<MultiProcessLock> test_lock =
MultiProcessLock::Create(name);
EXPECT_TRUE(test_lock->TryLock());
ExpectLockIsLocked(name);
}
ExpectLockIsUnlocked(name);
}
MULTIPROCESS_TEST_MAIN(MultiProcessLockTryFailMain) {
std::string name;
std::unique_ptr<base::Environment> environment(base::Environment::Create());
EXPECT_TRUE(environment->GetVar(MultiProcessLockTest::kLockEnvironmentVarName,
&name));
#if defined(OS_MACOSX)
// OS X sends out a log if a lock fails.
// Hopefully this will keep people from panicking about it when they
// are perusing the build logs.
LOG(INFO) << "Following error log "
<< "\"CFMessagePort: bootstrap_register(): failed 1100 (0x44c) "
<< "'Permission denied'\" is expected";
#endif // defined(OS_MACOSX)
std::unique_ptr<MultiProcessLock> test_lock = MultiProcessLock::Create(name);
// Expect locking to fail because it is claimed by another process.
bool locked_successfully = test_lock->TryLock();
EXPECT_FALSE(locked_successfully);
return locked_successfully;
}
MULTIPROCESS_TEST_MAIN(MultiProcessLockTrySucceedMain) {
std::string name;
std::unique_ptr<base::Environment> environment(base::Environment::Create());
EXPECT_TRUE(environment->GetVar(MultiProcessLockTest::kLockEnvironmentVarName,
&name));
std::unique_ptr<MultiProcessLock> test_lock = MultiProcessLock::Create(name);
// Expect locking to succeed because it is not claimed yet.
bool locked_successfully = test_lock->TryLock();
EXPECT_TRUE(locked_successfully);
return !locked_successfully;
}
|
