Merge changes Ic0719395,Id9f1b639,I00474797,Ide06476a am: 4fccd09896 am:... (7cb9689a) · Commits · e / os / android_frameworks_native

libs/binder/RpcServer.cpp

+12 −0

Original line number	Diff line number	Diff line
		@@ -216,4 +216,16 @@ bool RpcServer::setupSocketServer(const RpcSocketAddress& addr) {
		return true;
		}

		void RpcServer::onSessionTerminating(const sp<RpcSession>& session) {
		auto id = session->mId;
		LOG_ALWAYS_FATAL_IF(id == std::nullopt, "Server sessions must be initialized with ID");
		LOG_RPC_DETAIL("Dropping session %d", *id);

		std::lock_guard<std::mutex> _l(mLock);
		auto it = mSessions.find(*id);
		LOG_ALWAYS_FATAL_IF(it == mSessions.end(), "Bad state, unknown session id %d", *id);
		LOG_ALWAYS_FATAL_IF(it->second != session, "Bad state, session has id mismatch %d", *id);
		(void)mSessions.erase(it);
		}

		} // namespace android

libs/binder/RpcSession.cpp

+24 −2

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@
		#include <string_view>

		#include <binder/Parcel.h>
		#include <binder/RpcServer.h>
		#include <binder/Stability.h>
		#include <utils/String8.h>

		@@ -142,8 +143,10 @@ void RpcSession::startThread(unique_fd client) {
		holdThis->join(unique_fd(fd));
		{
		std::lock_guard<std::mutex> _l(holdThis->mMutex);
		size_t erased = mThreads.erase(std::this_thread::get_id());
		LOG_ALWAYS_FATAL_IF(erased != 0, "Could not erase thread.");
		auto it = mThreads.find(std::this_thread::get_id());
		LOG_ALWAYS_FATAL_IF(it == mThreads.end());
		it->second.detach();
		mThreads.erase(it);
		}
		});
		mThreads[thread.get_id()] = std::move(thread);
		@@ -168,6 +171,22 @@ void RpcSession::join(unique_fd client) {
		"bad state: connection object guaranteed to be in list");
		}

		void RpcSession::terminateLocked() {
		// TODO(b/185167543):
		// - kindly notify other side of the connection of termination (can't be
		// locked)
		// - prevent new client/servers from being added
		// - stop all threads which are currently reading/writing
		// - terminate RpcState?

		if (mTerminated) return;

		sp<RpcServer> server = mForServer.promote();
		if (server) {
		server->onSessionTerminating(sp<RpcSession>::fromExisting(this));
		}
		}

		wp<RpcServer> RpcSession::server() {
		return mForServer;
		}
		@@ -264,6 +283,9 @@ bool RpcSession::removeServerConnection(const sp<RpcConnection>& connection) {
		std::lock_guard<std::mutex> _l(mMutex);
		if (auto it = std::find(mServers.begin(), mServers.end(), connection); it != mServers.end()) {
		mServers.erase(it);
		if (mServers.size() == 0) {
		terminateLocked();
		}
		return true;
		}
		return false;

libs/binder/RpcState.cpp

+26 −11

Original line number	Diff line number	Diff line
		@@ -326,7 +326,11 @@ status_t RpcState::transact(const base::unique_fd& fd, const RpcAddress& address
		.asyncNumber = asyncNumber,
		};

		std::vector<uint8_t> transactionData(sizeof(RpcWireTransaction) + data.dataSize());
		ByteVec transactionData(sizeof(RpcWireTransaction) + data.dataSize());
		if (!transactionData.valid()) {
		return NO_MEMORY;
		}

		memcpy(transactionData.data() + 0, &transaction, sizeof(RpcWireTransaction));
		memcpy(transactionData.data() + sizeof(RpcWireTransaction), data.data(), data.dataSize());

		@@ -379,9 +383,12 @@ status_t RpcState::waitForReply(const base::unique_fd& fd, const sp<RpcSession>&
		if (status != OK) return status;
		}

		uint8_t* data = new uint8_t[command.bodySize];
		ByteVec data(command.bodySize);
		if (!data.valid()) {
		return NO_MEMORY;
		}

		if (!rpcRec(fd, "reply body", data, command.bodySize)) {
		if (!rpcRec(fd, "reply body", data.data(), command.bodySize)) {
		return DEAD_OBJECT;
		}

		@@ -391,9 +398,10 @@ status_t RpcState::waitForReply(const base::unique_fd& fd, const sp<RpcSession>&
		terminate();
		return BAD_VALUE;
		}
		RpcWireReply* rpcReply = reinterpret_cast<RpcWireReply*>(data);
		RpcWireReply* rpcReply = reinterpret_cast<RpcWireReply*>(data.data());
		if (rpcReply->status != OK) return rpcReply->status;

		data.release();
		reply->ipcSetDataReference(rpcReply->data, command.bodySize - offsetof(RpcWireReply, data),
		nullptr, 0, cleanup_reply_data);

		@@ -461,7 +469,10 @@ status_t RpcState::processTransact(const base::unique_fd& fd, const sp<RpcSessio
		const RpcWireHeader& command) {
		LOG_ALWAYS_FATAL_IF(command.command != RPC_COMMAND_TRANSACT, "command: %d", command.command);

		std::vector<uint8_t> transactionData(command.bodySize);
		ByteVec transactionData(command.bodySize);
		if (!transactionData.valid()) {
		return NO_MEMORY;
		}
		if (!rpcRec(fd, "transaction body", transactionData.data(), transactionData.size())) {
		return DEAD_OBJECT;
		}
		@@ -479,7 +490,7 @@ static void do_nothing_to_transact_data(Parcel* p, const uint8_t* data, size_t d
		}

		status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<RpcSession>& session,
		std::vector<uint8_t>&& transactionData) {
		ByteVec transactionData) {
		if (transactionData.size() < sizeof(RpcWireTransaction)) {
		ALOGE("Expecting %zu but got %zu bytes for RpcWireTransaction. Terminating!",
		sizeof(RpcWireTransaction), transactionData.size());
		@@ -500,7 +511,6 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		auto it = mNodeForAddress.find(addr);
		if (it == mNodeForAddress.end()) {
		ALOGE("Unknown binder address %s.", addr.toString().c_str());
		dump();
		replyStatus = BAD_VALUE;
		} else {
		target = it->second.binder.promote();
		@@ -630,7 +640,7 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		// justification for const_cast (consider avoiding priority_queue):
		// - AsyncTodo operator< doesn't depend on 'data' object
		// - gotta go fast
		std::vector<uint8_t> data = std::move(
		ByteVec data = std::move(
		const_cast<BinderNode::AsyncTodo&>(it->second.asyncTodo.top()).data);
		it->second.asyncTodo.pop();
		_l.unlock();
		@@ -644,7 +654,10 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		.status = replyStatus,
		};

		std::vector<uint8_t> replyData(sizeof(RpcWireReply) + reply.dataSize());
		ByteVec replyData(sizeof(RpcWireReply) + reply.dataSize());
		if (!replyData.valid()) {
		return NO_MEMORY;
		}
		memcpy(replyData.data() + 0, &rpcReply, sizeof(RpcWireReply));
		memcpy(replyData.data() + sizeof(RpcWireReply), reply.data(), reply.dataSize());

		@@ -671,7 +684,10 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		status_t RpcState::processDecStrong(const base::unique_fd& fd, const RpcWireHeader& command) {
		LOG_ALWAYS_FATAL_IF(command.command != RPC_COMMAND_DEC_STRONG, "command: %d", command.command);

		std::vector<uint8_t> commandData(command.bodySize);
		ByteVec commandData(command.bodySize);
		if (!commandData.valid()) {
		return NO_MEMORY;
		}
		if (!rpcRec(fd, "dec ref body", commandData.data(), commandData.size())) {
		return DEAD_OBJECT;
		}
		@@ -690,7 +706,6 @@ status_t RpcState::processDecStrong(const base::unique_fd& fd, const RpcWireHead
		auto it = mNodeForAddress.find(addr);
		if (it == mNodeForAddress.end()) {
		ALOGE("Unknown binder address %s for dec strong.", addr.toString().c_str());
		dump();
		return OK;
		}

libs/binder/RpcState.h

+17 −2

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@
		#include <binder/RpcSession.h>

		#include <map>
		#include <optional>
		#include <queue>

		namespace android {
		@@ -100,6 +101,20 @@ private:
		*/
		void terminate();

		// alternative to std::vector<uint8_t> that doesn't abort on too big of allocations
		struct ByteVec {
		explicit ByteVec(size_t size)
		: mData(size > 0 ? new (std::nothrow) uint8_t[size] : nullptr), mSize(size) {}
		bool valid() { return mSize == 0 \|\| mData != nullptr; }
		size_t size() { return mSize; }
		uint8_t* data() { return mData.get(); }
		uint8_t* release() { return mData.release(); }

		private:
		std::unique_ptr<uint8_t[]> mData;
		size_t mSize;
		};

		[[nodiscard]] bool rpcSend(const base::unique_fd& fd, const char* what, const void* data,
		size_t size);
		[[nodiscard]] bool rpcRec(const base::unique_fd& fd, const char* what, void* data, size_t size);
		@@ -113,7 +128,7 @@ private:
		const RpcWireHeader& command);
		[[nodiscard]] status_t processTransactInternal(const base::unique_fd& fd,
		const sp<RpcSession>& session,
		std::vector<uint8_t>&& transactionData);
		ByteVec transactionData);
		[[nodiscard]] status_t processDecStrong(const base::unique_fd& fd,
		const RpcWireHeader& command);

		@@ -148,7 +163,7 @@ private:

		// async transaction queue, _only_ for local binder
		struct AsyncTodo {
		std::vector<uint8_t> data; // most convenient format, to move it here
		ByteVec data;
		uint64_t asyncNumber = 0;

		bool operator<(const AsyncTodo& o) const {

libs/binder/include/binder/RpcServer.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -109,6 +109,10 @@ public:

		~RpcServer();

		// internal use only

		void onSessionTerminating(const sp<RpcSession>& session);

		private:
		friend sp<RpcServer>;
		RpcServer();