122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gtest/gtest.h>
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// membarrier(2) is only supported for bionic builds (b/111199492).
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#if defined(__BIONIC__)
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#include <linux/membarrier.h>
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#include <sys/syscall.h>
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class ScopedErrnoCleaner {
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public:
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ScopedErrnoCleaner() { errno = 0; }
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~ScopedErrnoCleaner() { errno = 0; }
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};
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bool HasMembarrier(int membarrier_cmd) {
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ScopedErrnoCleaner errno_cleaner;
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int supported_cmds = syscall(__NR_membarrier, MEMBARRIER_CMD_QUERY, 0);
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return (supported_cmds > 0) && ((supported_cmds & membarrier_cmd) != 0);
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}
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TEST(membarrier, query) {
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ScopedErrnoCleaner errno_cleaner;
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int supported = syscall(__NR_membarrier, MEMBARRIER_CMD_QUERY, 0);
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if (errno == 0) {
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ASSERT_TRUE(supported >= 0);
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} else {
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ASSERT_TRUE(errno == ENOSYS && supported == -1);
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}
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}
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TEST(membarrier, global_barrier) {
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if (!HasMembarrier(MEMBARRIER_CMD_GLOBAL)) {
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GTEST_SKIP() << "MEMBARRIER_CMD_GLOBAL not supported";
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}
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ASSERT_EQ(0, syscall(__NR_membarrier, MEMBARRIER_CMD_GLOBAL, 0));
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}
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static const char* MembarrierCommandToName(int membarrier_cmd) {
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switch (membarrier_cmd) {
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case MEMBARRIER_CMD_QUERY:
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return "MEMBARRIER_CMD_QUERY";
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case MEMBARRIER_CMD_GLOBAL:
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return "MEMBARRIER_CMD_GLOBAL";
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case MEMBARRIER_CMD_GLOBAL_EXPEDITED:
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return "MEMBARRIER_CMD_GLOBAL_EXPEDITED";
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case MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED:
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return "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED";
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case MEMBARRIER_CMD_PRIVATE_EXPEDITED:
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return "MEMBARRIER_CMD_PRIVATE_EXPEDITED";
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case MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED:
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return "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
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case MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE:
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return "MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE";
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case MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE:
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return "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";
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default:
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return "MEMBARRIER_UNKNOWN";
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}
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}
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static void TestRegisterAndBarrierCommands(int membarrier_cmd_register,
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int membarrier_cmd_barrier) {
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if (!HasMembarrier(membarrier_cmd_register)) {
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GTEST_SKIP() << MembarrierCommandToName(membarrier_cmd_register) << " not supported";
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}
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if (!HasMembarrier(membarrier_cmd_barrier)) {
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GTEST_SKIP() << MembarrierCommandToName(membarrier_cmd_barrier) << " not supported";
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}
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ScopedErrnoCleaner errno_cleaner;
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// Check barrier use without prior registration.
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if (membarrier_cmd_register == MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED) {
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// Global barrier use is always okay.
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ASSERT_EQ(0, syscall(__NR_membarrier, membarrier_cmd_barrier, 0));
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} else {
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// Private barrier should fail.
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ASSERT_EQ(-1, syscall(__NR_membarrier, membarrier_cmd_barrier, 0));
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ASSERT_EQ(EPERM, errno);
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errno = 0;
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}
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// Check registration for barrier succeeds.
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ASSERT_EQ(0, syscall(__NR_membarrier, membarrier_cmd_register, 0));
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// Check barrier use after registration succeeds.
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ASSERT_EQ(0, syscall(__NR_membarrier, membarrier_cmd_barrier, 0));
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}
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TEST(membarrier, global_expedited) {
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TestRegisterAndBarrierCommands(MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED,
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MEMBARRIER_CMD_GLOBAL_EXPEDITED);
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}
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TEST(membarrier, private_expedited) {
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TestRegisterAndBarrierCommands(MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED,
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MEMBARRIER_CMD_PRIVATE_EXPEDITED);
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}
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TEST(membarrier, private_expedited_sync_core) {
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TestRegisterAndBarrierCommands(MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE,
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MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE);
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}
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#endif // __BIONIC__
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