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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include "membarrier.h"
class ScopedErrnoCleaner {
public:
ScopedErrnoCleaner() { errno = 0; }
~ScopedErrnoCleaner() { errno = 0; }
};
bool HasMembarrier(art::MembarrierCommand cmd) {
ScopedErrnoCleaner errno_cleaner;
int supported_cmds = art::membarrier(art::MembarrierCommand::kQuery);
return (supported_cmds > 0) && ((supported_cmds & static_cast<int>(cmd)) != 0);
}
TEST(membarrier, query) {
ScopedErrnoCleaner errno_cleaner;
int supported = art::membarrier(art::MembarrierCommand::kQuery);
if (errno == 0) {
ASSERT_LE(0, supported);
} else {
ASSERT_TRUE(errno == ENOSYS && supported == -1);
}
}
TEST(membarrier, global_barrier) {
if (!HasMembarrier(art::MembarrierCommand::kGlobal)) {
GTEST_LOG_(INFO) << "MembarrierCommand::kGlobal not supported, skipping test.";
return;
}
ASSERT_EQ(0, art::membarrier(art::MembarrierCommand::kGlobal));
}
static const char* MembarrierCommandToName(art::MembarrierCommand cmd) {
#define CASE_VALUE(x) case (x): return #x;
switch (cmd) {
CASE_VALUE(art::MembarrierCommand::kQuery);
CASE_VALUE(art::MembarrierCommand::kGlobal);
CASE_VALUE(art::MembarrierCommand::kGlobalExpedited);
CASE_VALUE(art::MembarrierCommand::kRegisterGlobalExpedited);
CASE_VALUE(art::MembarrierCommand::kPrivateExpedited);
CASE_VALUE(art::MembarrierCommand::kRegisterPrivateExpedited);
CASE_VALUE(art::MembarrierCommand::kPrivateExpeditedSyncCore);
CASE_VALUE(art::MembarrierCommand::kRegisterPrivateExpeditedSyncCore);
}
}
static void TestRegisterAndBarrierCommands(art::MembarrierCommand membarrier_cmd_register,
art::MembarrierCommand membarrier_cmd_barrier) {
if (!HasMembarrier(membarrier_cmd_register)) {
GTEST_LOG_(INFO) << MembarrierCommandToName(membarrier_cmd_register)
<< " not supported, skipping test.";
return;
}
if (!HasMembarrier(membarrier_cmd_barrier)) {
GTEST_LOG_(INFO) << MembarrierCommandToName(membarrier_cmd_barrier)
<< " not supported, skipping test.";
return;
}
ScopedErrnoCleaner errno_cleaner;
// Check barrier use without prior registration.
if (membarrier_cmd_register == art::MembarrierCommand::kRegisterGlobalExpedited) {
// Global barrier use is always okay.
ASSERT_EQ(0, art::membarrier(membarrier_cmd_barrier));
} else {
// Private barrier should fail.
ASSERT_EQ(-1, art::membarrier(membarrier_cmd_barrier));
ASSERT_EQ(EPERM, errno);
errno = 0;
}
// Check registration for barrier succeeds.
ASSERT_EQ(0, art::membarrier(membarrier_cmd_register));
// Check barrier use after registration succeeds.
ASSERT_EQ(0, art::membarrier(membarrier_cmd_barrier));
}
TEST(membarrier, global_expedited) {
TestRegisterAndBarrierCommands(art::MembarrierCommand::kRegisterGlobalExpedited,
art::MembarrierCommand::kGlobalExpedited);
}
TEST(membarrier, private_expedited) {
TestRegisterAndBarrierCommands(art::MembarrierCommand::kRegisterPrivateExpedited,
art::MembarrierCommand::kPrivateExpedited);
}
TEST(membarrier, private_expedited_sync_core) {
TestRegisterAndBarrierCommands(art::MembarrierCommand::kRegisterPrivateExpeditedSyncCore,
art::MembarrierCommand::kPrivateExpeditedSyncCore);
}
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