Kristian Monsen | ddb351d | 2011-06-28 21:49:31 +0100 | [diff] [blame] | 1 | // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
Ben Murdoch | 4a5e2dc | 2010-11-25 19:40:10 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "base/basictypes.h" |
| 6 | #include "base/environment.h" |
| 7 | #include "base/logging.h" |
Kristian Monsen | ddb351d | 2011-06-28 21:49:31 +0100 | [diff] [blame] | 8 | #include "base/memory/scoped_ptr.h" |
Ben Murdoch | 4a5e2dc | 2010-11-25 19:40:10 +0000 | [diff] [blame] | 9 | #include "base/rand_util.h" |
Ben Murdoch | 4a5e2dc | 2010-11-25 19:40:10 +0000 | [diff] [blame] | 10 | #include "base/stringprintf.h" |
| 11 | #include "base/test/multiprocess_test.h" |
| 12 | #include "base/time.h" |
| 13 | #include "chrome/common/multi_process_lock.h" |
| 14 | #include "testing/multiprocess_func_list.h" |
| 15 | |
| 16 | class MultiProcessLockTest : public base::MultiProcessTest { |
| 17 | public: |
| 18 | static const char kLockEnviromentVarName[]; |
| 19 | |
| 20 | class ScopedEnvironmentVariable { |
| 21 | public: |
| 22 | ScopedEnvironmentVariable(const std::string &name, |
| 23 | const std::string &value) |
| 24 | : name_(name), environment_(base::Environment::Create()) { |
| 25 | environment_->SetVar(name_.c_str(), value); |
| 26 | } |
| 27 | ~ScopedEnvironmentVariable() { |
| 28 | environment_->UnSetVar(name_.c_str()); |
| 29 | } |
| 30 | |
| 31 | private: |
| 32 | std::string name_; |
| 33 | scoped_ptr<base::Environment> environment_; |
| 34 | DISALLOW_COPY_AND_ASSIGN(ScopedEnvironmentVariable); |
| 35 | }; |
| 36 | |
| 37 | std::string GenerateLockName(); |
| 38 | void ExpectLockIsLocked(const std::string &name); |
| 39 | void ExpectLockIsUnlocked(const std::string &name); |
| 40 | }; |
| 41 | |
| 42 | const char MultiProcessLockTest::kLockEnviromentVarName[] |
| 43 | = "MULTI_PROCESS_TEST_LOCK_NAME"; |
| 44 | |
| 45 | std::string MultiProcessLockTest::GenerateLockName() { |
| 46 | base::Time now = base::Time::NowFromSystemTime(); |
| 47 | return base::StringPrintf("multi_process_test_lock %lf%lf", |
| 48 | now.ToDoubleT(), base::RandDouble()); |
| 49 | } |
| 50 | |
| 51 | void MultiProcessLockTest::ExpectLockIsLocked(const std::string &name) { |
| 52 | ScopedEnvironmentVariable var(kLockEnviromentVarName, name); |
| 53 | base::ProcessHandle handle = SpawnChild("MultiProcessLockTryFailMain", false); |
| 54 | ASSERT_TRUE(handle); |
| 55 | int exit_code = 0; |
| 56 | EXPECT_TRUE(base::WaitForExitCode(handle, &exit_code)); |
| 57 | EXPECT_EQ(exit_code, 0); |
| 58 | } |
| 59 | |
| 60 | void MultiProcessLockTest::ExpectLockIsUnlocked( |
| 61 | const std::string &name) { |
| 62 | ScopedEnvironmentVariable var(kLockEnviromentVarName, name); |
| 63 | base::ProcessHandle handle = SpawnChild("MultiProcessLockTrySucceedMain", |
| 64 | false); |
| 65 | ASSERT_TRUE(handle); |
| 66 | int exit_code = 0; |
| 67 | EXPECT_TRUE(base::WaitForExitCode(handle, &exit_code)); |
| 68 | EXPECT_EQ(exit_code, 0); |
| 69 | } |
| 70 | |
| 71 | TEST_F(MultiProcessLockTest, BasicCreationTest) { |
| 72 | // Test basic creation/destruction with no lock taken |
| 73 | std::string name = GenerateLockName(); |
| 74 | scoped_ptr<MultiProcessLock> scoped(MultiProcessLock::Create(name)); |
| 75 | ExpectLockIsUnlocked(name); |
| 76 | scoped.reset(NULL); |
| 77 | } |
| 78 | |
| 79 | TEST_F(MultiProcessLockTest, LongNameTest) { |
| 80 | // Linux has a max path name of 108 characters. |
| 81 | // http://lxr.linux.no/linux+v2.6.36/include/linux/un.h |
| 82 | // This is enforced on all platforms. |
| 83 | LOG(INFO) << "Following error log due to long name is expected"; |
| 84 | std::string name("This is a name that is longer than one hundred and eight " |
| 85 | "characters to make sure that we fail appropriately on linux when we " |
| 86 | "have a path that is to long for linux to handle"); |
| 87 | scoped_ptr<MultiProcessLock> test_lock(MultiProcessLock::Create(name)); |
| 88 | EXPECT_FALSE(test_lock->TryLock()); |
| 89 | } |
| 90 | |
| 91 | TEST_F(MultiProcessLockTest, SimpleLock) { |
| 92 | std::string name = GenerateLockName(); |
| 93 | scoped_ptr<MultiProcessLock> test_lock(MultiProcessLock::Create(name)); |
| 94 | EXPECT_TRUE(test_lock->TryLock()); |
| 95 | ExpectLockIsLocked(name); |
| 96 | test_lock->Unlock(); |
| 97 | ExpectLockIsUnlocked(name); |
| 98 | } |
| 99 | |
| 100 | TEST_F(MultiProcessLockTest, RecursiveLock) { |
| 101 | std::string name = GenerateLockName(); |
| 102 | scoped_ptr<MultiProcessLock> test_lock(MultiProcessLock::Create(name)); |
| 103 | EXPECT_TRUE(test_lock->TryLock()); |
| 104 | ExpectLockIsLocked(name); |
| 105 | LOG(INFO) << "Following error log " |
| 106 | << "'MultiProcessLock is already locked' is expected"; |
| 107 | EXPECT_TRUE(test_lock->TryLock()); |
| 108 | ExpectLockIsLocked(name); |
| 109 | test_lock->Unlock(); |
| 110 | ExpectLockIsUnlocked(name); |
| 111 | LOG(INFO) << "Following error log " |
| 112 | << "'Over-unlocked MultiProcessLock' is expected"; |
| 113 | test_lock->Unlock(); |
| 114 | ExpectLockIsUnlocked(name); |
| 115 | test_lock.reset(); |
| 116 | } |
| 117 | |
| 118 | TEST_F(MultiProcessLockTest, LockScope) { |
| 119 | // Check to see that lock is released when it goes out of scope. |
| 120 | std::string name = GenerateLockName(); |
| 121 | { |
| 122 | scoped_ptr<MultiProcessLock> test_lock(MultiProcessLock::Create(name)); |
| 123 | EXPECT_TRUE(test_lock->TryLock()); |
| 124 | ExpectLockIsLocked(name); |
| 125 | } |
| 126 | ExpectLockIsUnlocked(name); |
| 127 | } |
| 128 | |
| 129 | MULTIPROCESS_TEST_MAIN(MultiProcessLockTryFailMain) { |
| 130 | std::string name; |
| 131 | scoped_ptr<base::Environment> environment(base::Environment::Create()); |
| 132 | EXPECT_TRUE(environment->GetVar(MultiProcessLockTest::kLockEnviromentVarName, |
| 133 | &name)); |
| 134 | #if defined(OS_MACOSX) |
| 135 | // OS X sends out a log if a lock fails. |
| 136 | // Hopefully this will keep people from panicking about it when they |
| 137 | // are perusing the build logs. |
| 138 | LOG(INFO) << "Following error log " |
| 139 | << "\"CFMessagePort: bootstrap_register(): failed 1100 (0x44c) " |
| 140 | << "'Permission denied'\" is expected"; |
| 141 | #endif // defined(OS_MACOSX) |
| 142 | scoped_ptr<MultiProcessLock> test_lock( |
| 143 | MultiProcessLock::Create(name)); |
| 144 | EXPECT_FALSE(test_lock->TryLock()); |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | MULTIPROCESS_TEST_MAIN(MultiProcessLockTrySucceedMain) { |
| 149 | std::string name; |
| 150 | scoped_ptr<base::Environment> environment(base::Environment::Create()); |
| 151 | EXPECT_TRUE(environment->GetVar(MultiProcessLockTest::kLockEnviromentVarName, |
| 152 | &name)); |
| 153 | scoped_ptr<MultiProcessLock> test_lock( |
| 154 | MultiProcessLock::Create(name)); |
| 155 | EXPECT_TRUE(test_lock->TryLock()); |
| 156 | return 0; |
| 157 | } |