Add libbinderdebug (c03e3aa3) · Commits · e / os / platform_frameworks_native

cmds/lshal/Android.bp

+2 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@ cc_library_static {
		name: "liblshal",
		shared_libs: [
		"libbase",
		"libbinderdebug",
		"libcutils",
		"libutils",
		"libhidlbase",
		@@ -47,6 +48,7 @@ cc_defaults {
		name: "lshal_defaults",
		shared_libs: [
		"libbase",
		"libbinderdebug",
		"libcutils",
		"libutils",
		"libhidlbase",

cmds/lshal/ListCommand.cpp

+6 −90

Original line number	Diff line number	Diff line
		@@ -29,7 +29,6 @@

		#include <android-base/file.h>
		#include <android-base/logging.h>
		#include <android-base/parseint.h>
		#include <android/hidl/manager/1.0/IServiceManager.h>
		#include <hidl-hash/Hash.h>
		#include <hidl-util/FQName.h>
		@@ -203,97 +202,14 @@ VintfInfo ListCommand::getVintfInfo(const std::string& fqInstanceName,
		lshal::getVintfInfo(getFrameworkMatrix(), fqInstance, ta, FRAMEWORK_MATRIX);
		}

		static bool scanBinderContext(pid_t pid,
		const std::string &contextName,
		std::function<void(const std::string&)> eachLine) {
		std::ifstream ifs("/dev/binderfs/binder_logs/proc/" + std::to_string(pid));
		if (!ifs.is_open()) {
		ifs.open("/d/binder/proc/" + std::to_string(pid));
		if (!ifs.is_open()) {
		return false;
		}
		}

		static const std::regex kContextLine("^context (\\w+)$");

		bool isDesiredContext = false;
		std::string line;
		std::smatch match;
		while(getline(ifs, line)) {
		if (std::regex_search(line, match, kContextLine)) {
		isDesiredContext = match.str(1) == contextName;
		continue;
		}

		if (!isDesiredContext) {
		continue;
		}

		eachLine(line);
		}
		return true;
		}

		bool ListCommand::getPidInfo(
		pid_t serverPid, PidInfo *pidInfo) const {
		static const std::regex kReferencePrefix("^\\s*node \\d+:\\s+u([0-9a-f]+)\\s+c([0-9a-f]+)\\s+");
		static const std::regex kThreadPrefix("^\\s*thread \\d+:\\s+l\\s+(\\d)(\\d)");

		std::smatch match;
		return scanBinderContext(serverPid, "hwbinder", [&](const std::string& line) {
		if (std::regex_search(line, match, kReferencePrefix)) {
		const std::string &ptrString = "0x" + match.str(2); // use number after c
		uint64_t ptr;
		if (!::android::base::ParseUint(ptrString.c_str(), &ptr)) {
		// Should not reach here, but just be tolerant.
		err() << "Could not parse number " << ptrString << std::endl;
		return;
		}
		const std::string proc = " proc ";
		auto pos = line.rfind(proc);
		if (pos != std::string::npos) {
		for (const std::string &pidStr : split(line.substr(pos + proc.size()), ' ')) {
		int32_t pid;
		if (!::android::base::ParseInt(pidStr, &pid)) {
		err() << "Could not parse number " << pidStr << std::endl;
		return;
		}
		pidInfo->refPids[ptr].push_back(pid);
		}
		}

		return;
		}

		if (std::regex_search(line, match, kThreadPrefix)) {
		// "1" is waiting in binder driver
		// "2" is poll. It's impossible to tell if these are in use.
		// and HIDL default code doesn't use it.
		bool isInUse = match.str(1) != "1";
		// "0" is a thread that has called into binder
		// "1" is looper thread
		// "2" is main looper thread
		bool isHwbinderThread = match.str(2) != "0";

		if (!isHwbinderThread) {
		return;
		}

		if (isInUse) {
		pidInfo->threadUsage++;
		}

		pidInfo->threadCount++;
		return;
		}

		// not reference or thread line
		return;
		});
		pid_t serverPid, BinderPidInfo *pidInfo) const {
		const auto& status = getBinderPidInfo(BinderDebugContext::HWBINDER, serverPid, pidInfo);
		return status == OK;
		}

		const PidInfo* ListCommand::getPidInfoCached(pid_t serverPid) {
		auto pair = mCachedPidInfos.insert({serverPid, PidInfo{}});
		const BinderPidInfo* ListCommand::getPidInfoCached(pid_t serverPid) {
		auto pair = mCachedPidInfos.insert({serverPid, BinderPidInfo{}});
		if (pair.second /* did insertion take place? */) {
		if (!getPidInfo(serverPid, &pair.first->second)) {
		return nullptr;
		@@ -727,7 +643,7 @@ Status ListCommand::fetchBinderizedEntry(const sp<IServiceManager> &manager,
		entry->arch = fromBaseArchitecture(debugInfo.arch);

		if (debugInfo.pid != NO_PID) {
		const PidInfo* pidInfo = getPidInfoCached(debugInfo.pid);
		const BinderPidInfo* pidInfo = getPidInfoCached(debugInfo.pid);
		if (pidInfo == nullptr) {
		handleError(IO_ERROR,
		"no information for PID " + std::to_string(debugInfo.pid) +

cmds/lshal/ListCommand.h

+4 −9

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@

		#include <android-base/macros.h>
		#include <android/hidl/manager/1.0/IServiceManager.h>
		#include <binderdebug/BinderDebug.h>
		#include <hidl-util/FqInstance.h>
		#include <vintf/HalManifest.h>
		#include <vintf/VintfObject.h>
		@@ -40,12 +41,6 @@ namespace lshal {

		class Lshal;

		struct PidInfo {
		std::map<uint64_t, Pids> refPids; // pids that are referenced
		uint32_t threadUsage; // number of threads in use
		uint32_t threadCount; // number of threads total
		};

		enum class HalType {
		BINDERIZED_SERVICES = 0,
		PASSTHROUGH_CLIENTS,
		@@ -110,9 +105,9 @@ protected:
		// Get relevant information for a PID by parsing files under
		// /dev/binderfs/binder_logs or /d/binder.
		// It is a virtual member function so that it can be mocked.
		virtual bool getPidInfo(pid_t serverPid, PidInfo *info) const;
		virtual bool getPidInfo(pid_t serverPid, BinderPidInfo *info) const;
		// Retrieve from mCachedPidInfos and call getPidInfo if necessary.
		const PidInfo* getPidInfoCached(pid_t serverPid);
		const BinderPidInfo* getPidInfoCached(pid_t serverPid);

		void dumpTable(const NullableOStream<std::ostream>& out) const;
		void dumpVintf(const NullableOStream<std::ostream>& out) const;
		@@ -191,7 +186,7 @@ protected:
		std::map<pid_t, std::string> mCmdlines;

		// Cache for getPidInfo.
		std::map<pid_t, PidInfo> mCachedPidInfos;
		std::map<pid_t, BinderPidInfo> mCachedPidInfos;

		// Cache for getPartition.
		std::map<pid_t, Partition> mPartitions;

cmds/lshal/TableEntry.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -32,7 +32,7 @@ namespace android {
		namespace lshal {

		using android::procpartition::Partition;
		using Pids = std::vector<int32_t>;
		using Pids = std::vector<pid_t>;

		enum class TableColumnType : unsigned int {
		INTERFACE_NAME = 0,

cmds/lshal/test.cpp

+5 −5

Original line number	Diff line number	Diff line
		@@ -233,12 +233,12 @@ public:
		return ListCommand::dumpVintf(out);
		}
		void internalPostprocess() { ListCommand::postprocess(); }
		const PidInfo* getPidInfoCached(pid_t serverPid) {
		const BinderPidInfo* getPidInfoCached(pid_t serverPid) {
		return ListCommand::getPidInfoCached(serverPid);
		}

		MOCK_METHOD0(postprocess, void());
		MOCK_CONST_METHOD2(getPidInfo, bool(pid_t, PidInfo*));
		MOCK_CONST_METHOD2(getPidInfo, bool(pid_t, BinderPidInfo*));
		MOCK_CONST_METHOD1(parseCmdline, std::string(pid_t));
		MOCK_METHOD1(getPartition, Partition(pid_t));

		@@ -299,8 +299,8 @@ static uint64_t getPtr(pid_t serverId) { return 10000 + serverId; }
		static std::vector<pid_t> getClients(pid_t serverId) {
		return {serverId + 1, serverId + 3};
		}
		static PidInfo getPidInfoFromId(pid_t serverId) {
		PidInfo info;
		static BinderPidInfo getPidInfoFromId(pid_t serverId) {
		BinderPidInfo info;
		info.refPids[getPtr(serverId)] = getClients(serverId);
		info.threadUsage = 10 + serverId;
		info.threadCount = 20 + serverId;
		@@ -363,7 +363,7 @@ public:
		void initMockList() {
		mockList = std::make_unique<NiceMock<MockListCommand>>(lshal.get());
		ON_CALL(*mockList, getPidInfo(_,_)).WillByDefault(Invoke(
		[](pid_t serverPid, PidInfo* info) {
		[](pid_t serverPid, BinderPidInfo* info) {
		*info = getPidInfoFromId(serverPid);
		return true;
		}));