Merge changes Iea2d97fb,I08fa3905,Idd5b923e (e1ae2ff9) · Commits · e / os / android_system_core

init/Android.bp

+2 −0

Original line number	Diff line number	Diff line
		@@ -93,6 +93,8 @@ cc_library_static {
		defaults: ["init_defaults"],
		srcs: [
		"action.cpp",
		"action_manager.cpp",
		"action_parser.cpp",
		"bootchart.cpp",
		"builtins.cpp",
		"capabilities.cpp",

init/action.cpp

+9 −220

Original line number	Diff line number	Diff line
		@@ -21,11 +21,9 @@
		#include <android-base/properties.h>
		#include <android-base/strings.h>

		#include "stable_properties.h"
		#include "util.h"

		using android::base::Join;
		using android::base::StartsWith;

		namespace android {
		namespace init {
		@@ -70,8 +68,15 @@ std::string Command::BuildCommandString() const {
		return Join(args_, ' ');
		}

		Action::Action(bool oneshot, Subcontext* subcontext, const std::string& filename, int line)
		: oneshot_(oneshot), subcontext_(subcontext), filename_(filename), line_(line) {}
		Action::Action(bool oneshot, Subcontext* subcontext, const std::string& filename, int line,
		const std::string& event_trigger,
		const std::map<std::string, std::string>& property_triggers)
		: property_triggers_(property_triggers),
		event_trigger_(event_trigger),
		oneshot_(oneshot),
		subcontext_(subcontext),
		filename_(filename),
		line_(line) {}

		const KeywordFunctionMap* Action::function_map_ = nullptr;

		@@ -135,85 +140,6 @@ void Action::ExecuteCommand(const Command& command) const {
		}
		}

		static bool IsActionableProperty(Subcontext* subcontext, const std::string& prop_name) {
		static bool enabled =
		android::base::GetBoolProperty("ro.actionable_compatible_property.enabled", false);

		if (subcontext == nullptr \|\| !enabled) {
		return true;
		}

		if (kExportedActionableProperties.count(prop_name) == 1) {
		return true;
		}
		for (const auto& prefix : kPartnerPrefixes) {
		if (android::base::StartsWith(prop_name, prefix)) {
		return true;
		}
		}
		return false;
		}

		Result<Success> Action::ParsePropertyTrigger(const std::string& trigger) {
		const static std::string prop_str("property:");
		std::string prop_name(trigger.substr(prop_str.length()));
		size_t equal_pos = prop_name.find('=');
		if (equal_pos == std::string::npos) {
		return Error() << "property trigger found without matching '='";
		}

		std::string prop_value(prop_name.substr(equal_pos + 1));
		prop_name.erase(equal_pos);

		if (!IsActionableProperty(subcontext_, prop_name)) {
		return Error() << "unexported property tigger found: " << prop_name;
		}

		if (auto [it, inserted] = property_triggers_.emplace(prop_name, prop_value); !inserted) {
		return Error() << "multiple property triggers found for same property";
		}
		return Success();
		}

		Result<Success> Action::InitTriggers(const std::vector<std::string>& args) {
		const static std::string prop_str("property:");
		for (std::size_t i = 0; i < args.size(); ++i) {
		if (args[i].empty()) {
		return Error() << "empty trigger is not valid";
		}

		if (i % 2) {
		if (args[i] != "&&") {
		return Error() << "&& is the only symbol allowed to concatenate actions";
		} else {
		continue;
		}
		}

		if (!args[i].compare(0, prop_str.length(), prop_str)) {
		if (auto result = ParsePropertyTrigger(args[i]); !result) {
		return result;
		}
		} else {
		if (!event_trigger_.empty()) {
		return Error() << "multiple event triggers are not allowed";
		}

		event_trigger_ = args[i];
		}
		}

		return Success();
		}

		Result<Success> Action::InitSingleTrigger(const std::string& trigger) {
		std::vector<std::string> name_vector{trigger};
		if (auto result = InitTriggers(name_vector); !result) {
		return Error() << "InitTriggers() failed: " << result.error();
		}
		return Success();
		}

		// This function checks that all property triggers are satisfied, that is
		// for each (name, value) in property_triggers_, check that the current
		// value of the property 'name' == value.
		@@ -281,142 +207,5 @@ void Action::DumpState() const {
		}
		}

		ActionManager::ActionManager() : current_command_(0) {
		}

		ActionManager& ActionManager::GetInstance() {
		static ActionManager instance;
		return instance;
		}

		void ActionManager::AddAction(std::unique_ptr<Action> action) {
		actions_.emplace_back(std::move(action));
		}

		void ActionManager::QueueEventTrigger(const std::string& trigger) {
		event_queue_.emplace(trigger);
		}

		void ActionManager::QueuePropertyChange(const std::string& name, const std::string& value) {
		event_queue_.emplace(std::make_pair(name, value));
		}

		void ActionManager::QueueAllPropertyActions() {
		QueuePropertyChange("", "");
		}

		void ActionManager::QueueBuiltinAction(BuiltinFunction func, const std::string& name) {
		auto action = std::make_unique<Action>(true, nullptr, "<Builtin Action>", 0);
		std::vector<std::string> name_vector{name};

		if (auto result = action->InitSingleTrigger(name); !result) {
		LOG(ERROR) << "Cannot queue BuiltinAction for " << name << ": " << result.error();
		return;
		}

		action->AddCommand(func, name_vector, 0);

		event_queue_.emplace(action.get());
		actions_.emplace_back(std::move(action));
		}

		void ActionManager::ExecuteOneCommand() {
		// Loop through the event queue until we have an action to execute
		while (current_executing_actions_.empty() && !event_queue_.empty()) {
		for (const auto& action : actions_) {
		if (std::visit([&action](const auto& event) { return action->CheckEvent(event); },
		event_queue_.front())) {
		current_executing_actions_.emplace(action.get());
		}
		}
		event_queue_.pop();
		}

		if (current_executing_actions_.empty()) {
		return;
		}

		auto action = current_executing_actions_.front();

		if (current_command_ == 0) {
		std::string trigger_name = action->BuildTriggersString();
		LOG(INFO) << "processing action (" << trigger_name << ") from (" << action->filename()
		<< ":" << action->line() << ")";
		}

		action->ExecuteOneCommand(current_command_);

		// If this was the last command in the current action, then remove
		// the action from the executing list.
		// If this action was oneshot, then also remove it from actions_.
		++current_command_;
		if (current_command_ == action->NumCommands()) {
		current_executing_actions_.pop();
		current_command_ = 0;
		if (action->oneshot()) {
		auto eraser = [&action] (std::unique_ptr<Action>& a) {
		return a.get() == action;
		};
		actions_.erase(std::remove_if(actions_.begin(), actions_.end(), eraser));
		}
		}
		}

		bool ActionManager::HasMoreCommands() const {
		return !current_executing_actions_.empty() \|\| !event_queue_.empty();
		}

		void ActionManager::DumpState() const {
		for (const auto& a : actions_) {
		a->DumpState();
		}
		}

		void ActionManager::ClearQueue() {
		// We are shutting down so don't claim the oneshot builtin actions back
		current_executing_actions_ = {};
		event_queue_ = {};
		current_command_ = 0;
		}

		Result<Success> ActionParser::ParseSection(std::vector<std::string>&& args,
		const std::string& filename, int line) {
		std::vector<std::string> triggers(args.begin() + 1, args.end());
		if (triggers.size() < 1) {
		return Error() << "Actions must have a trigger";
		}

		Subcontext* action_subcontext = nullptr;
		if (subcontexts_) {
		for (auto& subcontext : *subcontexts_) {
		if (StartsWith(filename, subcontext.path_prefix())) {
		action_subcontext = &subcontext;
		break;
		}
		}
		}

		auto action = std::make_unique<Action>(false, action_subcontext, filename, line);

		if (auto result = action->InitTriggers(triggers); !result) {
		return Error() << "InitTriggers() failed: " << result.error();
		}

		action_ = std::move(action);
		return Success();
		}

		Result<Success> ActionParser::ParseLineSection(std::vector<std::string>&& args, int line) {
		return action_ ? action_->AddCommand(std::move(args), line) : Success();
		}

		Result<Success> ActionParser::EndSection() {
		if (action_ && action_->NumCommands() > 0) {
		action_manager_->AddAction(std::move(action_));
		}

		return Success();
		}

		} // namespace init
		} // namespace android

init/action.h

+3 −47

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

		#include "builtins.h"
		#include "keyword_map.h"
		#include "parser.h"
		#include "result.h"
		#include "subcontext.h"

		@@ -58,12 +57,12 @@ using BuiltinAction = class Action*;

		class Action {
		public:
		Action(bool oneshot, Subcontext* subcontext, const std::string& filename, int line);
		Action(bool oneshot, Subcontext* subcontext, const std::string& filename, int line,
		const std::string& event_trigger,
		const std::map<std::string, std::string>& property_triggers);

		Result<Success> AddCommand(const std::vector<std::string>& args, int line);
		void AddCommand(BuiltinFunction f, const std::vector<std::string>& args, int line);
		Result<Success> InitTriggers(const std::vector<std::string>& args);
		Result<Success> InitSingleTrigger(const std::string& trigger);
		std::size_t NumCommands() const;
		void ExecuteOneCommand(std::size_t command) const;
		void ExecuteAllCommands() const;
		@@ -84,7 +83,6 @@ class Action {
		void ExecuteCommand(const Command& command) const;
		bool CheckPropertyTriggers(const std::string& name = "",
		const std::string& value = "") const;
		Result<Success> ParsePropertyTrigger(const std::string& trigger);

		std::map<std::string, std::string> property_triggers_;
		std::string event_trigger_;
		@@ -96,48 +94,6 @@ class Action {
		static const KeywordFunctionMap* function_map_;
		};

		class ActionManager {
		public:
		static ActionManager& GetInstance();

		// Exposed for testing
		ActionManager();

		void AddAction(std::unique_ptr<Action> action);
		void QueueEventTrigger(const std::string& trigger);
		void QueuePropertyChange(const std::string& name, const std::string& value);
		void QueueAllPropertyActions();
		void QueueBuiltinAction(BuiltinFunction func, const std::string& name);
		void ExecuteOneCommand();
		bool HasMoreCommands() const;
		void DumpState() const;
		void ClearQueue();

		private:
		ActionManager(ActionManager const&) = delete;
		void operator=(ActionManager const&) = delete;

		std::vector<std::unique_ptr<Action>> actions_;
		std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_;
		std::queue<const Action*> current_executing_actions_;
		std::size_t current_command_;
		};

		class ActionParser : public SectionParser {
		public:
		ActionParser(ActionManager* action_manager, std::vector<Subcontext>* subcontexts)
		: action_manager_(action_manager), subcontexts_(subcontexts), action_(nullptr) {}
		Result<Success> ParseSection(std::vector<std::string>&& args, const std::string& filename,
		int line) override;
		Result<Success> ParseLineSection(std::vector<std::string>&& args, int line) override;
		Result<Success> EndSection() override;

		private:
		ActionManager* action_manager_;
		std::vector<Subcontext>* subcontexts_;
		std::unique_ptr<Action> action_;
		};

		} // namespace init
		} // namespace android

init/action_manager.cpp

0 → 100644

+116 −0

Original line number	Diff line number	Diff line
		/*
		* 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 "action_manager.h"

		#include <android-base/logging.h>

		namespace android {
		namespace init {

		ActionManager::ActionManager() : current_command_(0) {}

		ActionManager& ActionManager::GetInstance() {
		static ActionManager instance;
		return instance;
		}

		void ActionManager::AddAction(std::unique_ptr<Action> action) {
		actions_.emplace_back(std::move(action));
		}

		void ActionManager::QueueEventTrigger(const std::string& trigger) {
		event_queue_.emplace(trigger);
		}

		void ActionManager::QueuePropertyChange(const std::string& name, const std::string& value) {
		event_queue_.emplace(std::make_pair(name, value));
		}

		void ActionManager::QueueAllPropertyActions() {
		QueuePropertyChange("", "");
		}

		void ActionManager::QueueBuiltinAction(BuiltinFunction func, const std::string& name) {
		auto action = std::make_unique<Action>(true, nullptr, "<Builtin Action>", 0, name,
		std::map<std::string, std::string>{});
		std::vector<std::string> name_vector{name};

		action->AddCommand(func, name_vector, 0);

		event_queue_.emplace(action.get());
		actions_.emplace_back(std::move(action));
		}

		void ActionManager::ExecuteOneCommand() {
		// Loop through the event queue until we have an action to execute
		while (current_executing_actions_.empty() && !event_queue_.empty()) {
		for (const auto& action : actions_) {
		if (std::visit([&action](const auto& event) { return action->CheckEvent(event); },
		event_queue_.front())) {
		current_executing_actions_.emplace(action.get());
		}
		}
		event_queue_.pop();
		}

		if (current_executing_actions_.empty()) {
		return;
		}

		auto action = current_executing_actions_.front();

		if (current_command_ == 0) {
		std::string trigger_name = action->BuildTriggersString();
		LOG(INFO) << "processing action (" << trigger_name << ") from (" << action->filename()
		<< ":" << action->line() << ")";
		}

		action->ExecuteOneCommand(current_command_);

		// If this was the last command in the current action, then remove
		// the action from the executing list.
		// If this action was oneshot, then also remove it from actions_.
		++current_command_;
		if (current_command_ == action->NumCommands()) {
		current_executing_actions_.pop();
		current_command_ = 0;
		if (action->oneshot()) {
		auto eraser = [&action](std::unique_ptr<Action>& a) { return a.get() == action; };
		actions_.erase(std::remove_if(actions_.begin(), actions_.end(), eraser));
		}
		}
		}

		bool ActionManager::HasMoreCommands() const {
		return !current_executing_actions_.empty() \|\| !event_queue_.empty();
		}

		void ActionManager::DumpState() const {
		for (const auto& a : actions_) {
		a->DumpState();
		}
		}

		void ActionManager::ClearQueue() {
		// We are shutting down so don't claim the oneshot builtin actions back
		current_executing_actions_ = {};
		event_queue_ = {};
		current_command_ = 0;
		}

		} // namespace init
		} // namespace android

init/action_manager.h

0 → 100644

+59 −0

Original line number	Diff line number	Diff line
		/*
		* 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.
		*/

		#ifndef _INIT_ACTION_MANAGER_H
		#define _INIT_ACTION_MANAGER_H

		#include <string>
		#include <vector>

		#include "action.h"
		#include "builtins.h"

		namespace android {
		namespace init {

		class ActionManager {
		public:
		static ActionManager& GetInstance();

		// Exposed for testing
		ActionManager();

		void AddAction(std::unique_ptr<Action> action);
		void QueueEventTrigger(const std::string& trigger);
		void QueuePropertyChange(const std::string& name, const std::string& value);
		void QueueAllPropertyActions();
		void QueueBuiltinAction(BuiltinFunction func, const std::string& name);
		void ExecuteOneCommand();
		bool HasMoreCommands() const;
		void DumpState() const;
		void ClearQueue();

		private:
		ActionManager(ActionManager const&) = delete;
		void operator=(ActionManager const&) = delete;

		std::vector<std::unique_ptr<Action>> actions_;
		std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_;
		std::queue<const Action*> current_executing_actions_;
		std::size_t current_command_;
		};

		} // namespace init
		} // namespace android

		#endif