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/*
* Copyright (C) 2020 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 <BnAidlStuff.h>
#include <android-base/logging.h>
#include <binder/IServiceManager.h>
#include <binderthreadstate/CallerUtils.h>
#include <binderthreadstateutilstest/1.0/IHidlStuff.h>
#include <gtest/gtest.h>
#include <hidl/HidlTransportSupport.h>
#include <linux/prctl.h>
#include <sys/prctl.h>
using android::BinderCallType;
using android::defaultServiceManager;
using android::getCurrentServingCall;
using android::getService;
using android::OK;
using android::sp;
using android::String16;
using android::binder::Status;
using android::hardware::Return;
using binderthreadstateutilstest::V1_0::IHidlStuff;
constexpr size_t kP1Id = 1;
constexpr size_t kP2Id = 2;
// AIDL and HIDL are in separate namespaces so using same service names
std::string id2name(size_t id) {
return "libbinderthreadstateutils-" + std::to_string(id);
}
// There are two servers calling each other recursively like this.
//
// P1 P2
// | --HIDL--> |
// | <--HIDL-- |
// | --AIDL--> |
// | <--AIDL-- |
// | --HIDL--> |
// | <--HIDL-- |
// | --AIDL--> |
// | <--AIDL-- |
// ..........
//
// Calls always come in pairs (AIDL returns AIDL, HIDL returns HIDL) because
// this means that P1 always has a 'waitForResponse' call which can service the
// returning call and continue the recursion. Of course, with more threads, more
// complicated calls are possible, but this should do here.
static void callHidl(size_t id, int32_t idx) {
auto stuff = IHidlStuff::getService(id2name(id));
CHECK(stuff->call(idx).isOk());
}
static void callAidl(size_t id, int32_t idx) {
sp<IAidlStuff> stuff;
CHECK(OK == android::getService<IAidlStuff>(String16(id2name(id).c_str()), &stuff));
CHECK(stuff->call(idx).isOk());
}
class HidlServer : public IHidlStuff {
public:
HidlServer(size_t thisId, size_t otherId) : thisId(thisId), otherId(otherId) {}
size_t thisId;
size_t otherId;
Return<void> callLocal() {
CHECK(BinderCallType::NONE == getCurrentServingCall());
return android::hardware::Status::ok();
}
Return<void> call(int32_t idx) {
LOG(INFO) << "HidlServer CALL " << thisId << " to " << otherId << " at idx: " << idx
<< " with tid: " << gettid();
CHECK(BinderCallType::HWBINDER == getCurrentServingCall());
if (idx > 0) {
if (thisId == kP1Id && idx % 4 < 2) {
callHidl(otherId, idx - 1);
} else {
callAidl(otherId, idx - 1);
}
}
CHECK(BinderCallType::HWBINDER == getCurrentServingCall());
return android::hardware::Status::ok();
}
};
class AidlServer : public BnAidlStuff {
public:
AidlServer(size_t thisId, size_t otherId) : thisId(thisId), otherId(otherId) {}
size_t thisId;
size_t otherId;
Status callLocal() {
CHECK(BinderCallType::NONE == getCurrentServingCall());
return Status::ok();
}
Status call(int32_t idx) {
LOG(INFO) << "AidlServer CALL " << thisId << " to " << otherId << " at idx: " << idx
<< " with tid: " << gettid();
CHECK(BinderCallType::BINDER == getCurrentServingCall());
if (idx > 0) {
if (thisId == kP2Id && idx % 4 < 2) {
callHidl(otherId, idx - 1);
} else {
callAidl(otherId, idx - 1);
}
}
CHECK(BinderCallType::BINDER == getCurrentServingCall());
return Status::ok();
}
};
TEST(BinderThreadState, LocalHidlCall) {
sp<IHidlStuff> server = new HidlServer(0, 0);
EXPECT_TRUE(server->callLocal().isOk());
}
TEST(BinderThreadState, LocalAidlCall) {
sp<IAidlStuff> server = new AidlServer(0, 0);
EXPECT_TRUE(server->callLocal().isOk());
}
TEST(BindThreadState, RemoteHidlCall) {
auto stuff = IHidlStuff::getService(id2name(kP1Id));
ASSERT_NE(nullptr, stuff);
ASSERT_TRUE(stuff->call(0).isOk());
}
TEST(BindThreadState, RemoteAidlCall) {
sp<IAidlStuff> stuff;
ASSERT_EQ(OK, android::getService<IAidlStuff>(String16(id2name(kP1Id).c_str()), &stuff));
ASSERT_NE(nullptr, stuff);
ASSERT_TRUE(stuff->call(0).isOk());
}
TEST(BindThreadState, RemoteNestedStartHidlCall) {
auto stuff = IHidlStuff::getService(id2name(kP1Id));
ASSERT_NE(nullptr, stuff);
ASSERT_TRUE(stuff->call(100).isOk());
}
TEST(BindThreadState, RemoteNestedStartAidlCall) {
sp<IAidlStuff> stuff;
ASSERT_EQ(OK, android::getService<IAidlStuff>(String16(id2name(kP1Id).c_str()), &stuff));
ASSERT_NE(nullptr, stuff);
EXPECT_TRUE(stuff->call(100).isOk());
}
int server(size_t thisId, size_t otherId) {
// AIDL
android::ProcessState::self()->setThreadPoolMaxThreadCount(1);
sp<AidlServer> aidlServer = new AidlServer(thisId, otherId);
CHECK(OK == defaultServiceManager()->addService(String16(id2name(thisId).c_str()), aidlServer));
android::ProcessState::self()->startThreadPool();
// HIDL
android::hardware::configureRpcThreadpool(1, true /*callerWillJoin*/);
sp<IHidlStuff> hidlServer = new HidlServer(thisId, otherId);
CHECK(OK == hidlServer->registerAsService(id2name(thisId).c_str()));
android::hardware::joinRpcThreadpool();
return EXIT_FAILURE;
}
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
android::hardware::details::setTrebleTestingOverride(true);
if (fork() == 0) {
prctl(PR_SET_PDEATHSIG, SIGHUP);
return server(kP1Id, kP2Id);
}
if (fork() == 0) {
prctl(PR_SET_PDEATHSIG, SIGHUP);
return server(kP2Id, kP1Id);
}
android::waitForService<IAidlStuff>(String16(id2name(kP1Id).c_str()));
android::hardware::details::waitForHwService(IHidlStuff::descriptor, id2name(kP1Id).c_str());
android::waitForService<IAidlStuff>(String16(id2name(kP2Id).c_str()));
android::hardware::details::waitForHwService(IHidlStuff::descriptor, id2name(kP2Id).c_str());
return RUN_ALL_TESTS();
}
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