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// Copyright (c) 2020-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#ifndef ROCKSDB_LITE
#include "utilities/transactions/lock/point/point_lock_manager_test.h"
namespace ROCKSDB_NAMESPACE {
// This test is not applicable for Range Lock manager as Range Lock Manager
// operates on Column Families, not their ids.
TEST_F(PointLockManagerTest, LockNonExistingColumnFamily) {
MockColumnFamilyHandle cf(1024);
locker_->RemoveColumnFamily(&cf);
auto txn = NewTxn();
auto s = locker_->TryLock(txn, 1024, "k", env_, true);
ASSERT_TRUE(s.IsInvalidArgument());
ASSERT_STREQ(s.getState(), "Column family id not found: 1024");
delete txn;
}
TEST_F(PointLockManagerTest, LockStatus) {
MockColumnFamilyHandle cf1(1024), cf2(2048);
locker_->AddColumnFamily(&cf1);
locker_->AddColumnFamily(&cf2);
auto txn1 = NewTxn();
ASSERT_OK(locker_->TryLock(txn1, 1024, "k1", env_, true));
ASSERT_OK(locker_->TryLock(txn1, 2048, "k1", env_, true));
auto txn2 = NewTxn();
ASSERT_OK(locker_->TryLock(txn2, 1024, "k2", env_, false));
ASSERT_OK(locker_->TryLock(txn2, 2048, "k2", env_, false));
auto s = locker_->GetPointLockStatus();
ASSERT_EQ(s.size(), 4u);
for (uint32_t cf_id : {1024, 2048}) {
ASSERT_EQ(s.count(cf_id), 2u);
auto range = s.equal_range(cf_id);
for (auto it = range.first; it != range.second; it++) {
ASSERT_TRUE(it->second.key == "k1" || it->second.key == "k2");
if (it->second.key == "k1") {
ASSERT_EQ(it->second.exclusive, true);
ASSERT_EQ(it->second.ids.size(), 1u);
ASSERT_EQ(it->second.ids[0], txn1->GetID());
} else if (it->second.key == "k2") {
ASSERT_EQ(it->second.exclusive, false);
ASSERT_EQ(it->second.ids.size(), 1u);
ASSERT_EQ(it->second.ids[0], txn2->GetID());
}
}
}
// Cleanup
locker_->UnLock(txn1, 1024, "k1", env_);
locker_->UnLock(txn1, 2048, "k1", env_);
locker_->UnLock(txn2, 1024, "k2", env_);
locker_->UnLock(txn2, 2048, "k2", env_);
delete txn1;
delete txn2;
}
TEST_F(PointLockManagerTest, UnlockExclusive) {
MockColumnFamilyHandle cf(1);
locker_->AddColumnFamily(&cf);
auto txn1 = NewTxn();
ASSERT_OK(locker_->TryLock(txn1, 1, "k", env_, true));
locker_->UnLock(txn1, 1, "k", env_);
auto txn2 = NewTxn();
ASSERT_OK(locker_->TryLock(txn2, 1, "k", env_, true));
// Cleanup
locker_->UnLock(txn2, 1, "k", env_);
delete txn1;
delete txn2;
}
TEST_F(PointLockManagerTest, UnlockShared) {
MockColumnFamilyHandle cf(1);
locker_->AddColumnFamily(&cf);
auto txn1 = NewTxn();
ASSERT_OK(locker_->TryLock(txn1, 1, "k", env_, false));
locker_->UnLock(txn1, 1, "k", env_);
auto txn2 = NewTxn();
ASSERT_OK(locker_->TryLock(txn2, 1, "k", env_, true));
// Cleanup
locker_->UnLock(txn2, 1, "k", env_);
delete txn1;
delete txn2;
}
// This test doesn't work with Range Lock Manager, because Range Lock Manager
// doesn't support deadlock_detect_depth.
TEST_F(PointLockManagerTest, DeadlockDepthExceeded) {
// Tests that when detecting deadlock, if the detection depth is exceeded,
// it's also viewed as deadlock.
MockColumnFamilyHandle cf(1);
locker_->AddColumnFamily(&cf);
TransactionOptions txn_opt;
txn_opt.deadlock_detect = true;
txn_opt.deadlock_detect_depth = 1;
txn_opt.lock_timeout = 1000000;
auto txn1 = NewTxn(txn_opt);
auto txn2 = NewTxn(txn_opt);
auto txn3 = NewTxn(txn_opt);
auto txn4 = NewTxn(txn_opt);
// "a ->(k) b" means transaction a is waiting for transaction b to release
// the held lock on key k.
// txn4 ->(k3) -> txn3 ->(k2) txn2 ->(k1) txn1
// txn3's deadlock detection will exceed the detection depth 1,
// which will be viewed as a deadlock.
// NOTE:
// txn4 ->(k3) -> txn3 must be set up before
// txn3 ->(k2) -> txn2, because to trigger deadlock detection for txn3,
// it must have another txn waiting on it, which is txn4 in this case.
ASSERT_OK(locker_->TryLock(txn1, 1, "k1", env_, true));
port::Thread t1 = BlockUntilWaitingTxn(wait_sync_point_name_, [&]() {
ASSERT_OK(locker_->TryLock(txn2, 1, "k2", env_, true));
// block because txn1 is holding a lock on k1.
locker_->TryLock(txn2, 1, "k1", env_, true);
});
ASSERT_OK(locker_->TryLock(txn3, 1, "k3", env_, true));
port::Thread t2 = BlockUntilWaitingTxn(wait_sync_point_name_, [&]() {
// block because txn3 is holding a lock on k1.
locker_->TryLock(txn4, 1, "k3", env_, true);
});
auto s = locker_->TryLock(txn3, 1, "k2", env_, true);
ASSERT_TRUE(s.IsBusy());
ASSERT_EQ(s.subcode(), Status::SubCode::kDeadlock);
std::vector<DeadlockPath> deadlock_paths = locker_->GetDeadlockInfoBuffer();
ASSERT_EQ(deadlock_paths.size(), 1u);
ASSERT_TRUE(deadlock_paths[0].limit_exceeded);
locker_->UnLock(txn1, 1, "k1", env_);
locker_->UnLock(txn3, 1, "k3", env_);
t1.join();
t2.join();
delete txn4;
delete txn3;
delete txn2;
delete txn1;
}
INSTANTIATE_TEST_CASE_P(PointLockManager, AnyLockManagerTest,
::testing::Values(nullptr));
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
#include <stdio.h>
int main(int /*argc*/, char** /*argv*/) {
fprintf(stderr,
"SKIPPED because Transactions are not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // ROCKSDB_LITE
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