Initial Entry for bundler (71ee51f9) · Commits · e / os / android_packages_modules_Bluetooth

system/gd/Android.bp

+2 −2

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		@@ -206,8 +206,8 @@ cc_binary {
		":BluetoothFacade_security_layer",
		],
		generated_headers: [
		"BluetoothGeneratedPackets_h",
		"BluetoothFacadeGeneratedStub_h",
		"BluetoothGeneratedPackets_h",
		// Needed here to guarantee that generated zip file is created before
		// bluetooth_cert_tests.zip is packaged
		"BluetoothFacadeAndCertGeneratedStub_py",
		@@ -221,11 +221,11 @@ cc_binary {
		"breakpad_client",
		],
		shared_libs: [
		"libbacktrace",
		"libchrome",
		"libcrypto",
		"libgrpc++_unsecure",
		"libprotobuf-cpp-full",
		"libbacktrace",
		],
		target: {
		android: {

system/gd/dumpsys/bundler/Android.bp

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		filegroup {
		name: "BluetoothFlatbufferBundlerSources",
		srcs: [
		"bundler.cc",
		"main.cc",
		],
		}

		filegroup {
		name: "BluetoothFlatbufferBundlerTestSources",
		srcs: [
		"bundler.cc",
		"test.cc",
		],
		}

		genrule {
		name: "BluetoothGeneratedBundler_h",
		tools: [
		"flatc",
		],
		cmd: "$(location flatc) -I packages/modules/Bluetooth/system/gd -b --schema -o $(genDir) --cpp $(in) ",
		srcs: [
		"bundler.fbs",
		],
		out: [
		"bundler_generated.h", "bundler.bfbs",
		],
		}

		cc_binary {
		name: "bluetooth_flatbuffer_bundler",
		host_supported: true,
		cflags: [
		"-Wall",
		"-Werror",
		"-Wno-unused-parameter",
		"-Wno-unused-variable",
		],
		srcs: [
		":BluetoothFlatbufferBundlerSources",
		],
		generated_headers: [
		"BluetoothGeneratedBundler_h",
		],
		shared_libs: [
		"libflatbuffers-cpp",
		],
		sanitize: {
		address: true,
		},
		}

		cc_test {
		name: "bluetooth_flatbuffer_bundler_test",
		host_supported: true,
		cflags: [
		"-Wall",
		"-Werror",
		"-Wno-unused-parameter",
		"-Wno-unused-variable",
		"-DUSE_TEST_GENERATED",
		],
		srcs: [
		":BluetoothFlatbufferBundlerTestSources",
		],
		shared_libs: [
		"libflatbuffers-cpp",
		],
		sanitize: {
		address: true,
		},
		data: [
		"test.bfbs",
		],
		}

system/gd/dumpsys/bundler/bundler.cc

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		/*
		* Copyright 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 <assert.h>
		#include <stdio.h>
		#include <stdlib.h>
		#include <unistd.h>
		#include <cassert>
		#include <map>
		#include <vector>

		#include "bundler.h"
		#include "flatbuffers/idl.h"
		#include "flatbuffers/util.h"

		#ifdef USE_TEST_GENERATED
		#include "test_generated.h"
		#else
		#include "bundler_generated.h" // Production
		#endif

		using namespace bluetooth;
		using namespace dumpsys;

		struct Opts opts;

		/**
		* Load a binary schema from persistent store using flatbuffer API.
		*
		* @param filename; Name of file to open and read.
		* @param binary_schema: Backing store for flatbuffer binary schema data.
		*
		* @return: True if operation successful, false otherwise.
		*/
		bool LoadBinarySchema(const char* filename, std::string* binary_schema) {
		assert(filename != nullptr);
		assert(binary_schema != nullptr);
		if (!flatbuffers::LoadFile(filename, helper::AsBinaryFile, binary_schema)) {
		fprintf(stderr, "Unable to open binary flatbuffer schema file:%s\n", filename);
		return false;
		};
		return true;
		}

		/**
		* Verify a binary schema using flatbuffer API.
		*
		* @param schema: Raw binary schema to verify
		*
		* @return: True if operation successful, false otherwise.
		*/
		bool VerifyBinarySchema(const std::vector<const uint8_t>& raw_schema) {
		flatbuffers::Verifier verifier(raw_schema.data(), raw_schema.size());
		if (!reflection::VerifySchemaBuffer(verifier)) {
		return false;
		}
		return true;
		}

		/**
		* Bundle a set of binary flatbuffer schema into the bundler database.
		*
		* @param builder; Flatbuffer builder
		* @param filenames: Set of filenames to include in bundle
		* @param vector_map: Filename to filedata mapping
		*
		* @return: True if operation successful, false otherwise.
		*/
		bool CreateBinarySchemaBundle(
		flatbuffers::FlatBufferBuilder* builder,
		const std::vector<std::string>& filenames,
		std::vector<flatbuffers::Offset<BundleSchemaMap>>* vector_map) {
		assert(builder != nullptr);
		assert(vector_map != nullptr);

		for (auto filename : filenames) {
		std::string string_schema;
		if (!LoadBinarySchema(filename.c_str(), &string_schema)) {
		fprintf(stderr, "Unable to load binary schema from filename:%s\n", filename.c_str());
		return false;
		}
		std::vector<const uint8_t> raw_schema(string_schema.begin(), string_schema.end());
		if (!VerifyBinarySchema(raw_schema)) {
		fprintf(stderr, "Failed verification on binary schema filename:%s\n", filename.c_str());
		return false;
		}

		const reflection::Schema* schema = reflection::GetSchema(raw_schema.data());
		if (schema->root_table() == nullptr) {
		fprintf(stderr, "Unable to find root table for binary flatbuffer schema:%s\n", filename.c_str());
		return false;
		}

		auto name = builder->CreateString(schema->root_table()->name()->str());
		auto data = builder->CreateVector<uint8_t>(raw_schema.data(), raw_schema.size());
		vector_map->push_back(CreateBundleSchemaMap(*builder, name, data));

		if (opts.verbose) {
		fprintf(stdout, "Bundled binary schema file:%s\n", schema->root_table()->name()->c_str());
		}
		}
		return true;
		}

		/**
		* Write generated header file containing the bundled binary schema
		* data and meta data
		*
		* @param data: Source file data.
		* @param data_len: length of data
		*/
		void WriteHeaderFile(FILE* fp, const uint8_t* data, size_t data_len) {
		assert(fp != nullptr);
		std::string delim(kDefaultNamespaceDelim);
		std::string ns_string(opts.ns_name);
		std::vector<std::string> namespaces;

		size_t start = 0;
		size_t end = ns_string.find(delim);
		while (end != std::string::npos) {
		namespaces.push_back(ns_string.substr(start, end - start));
		start = end + delim.size();
		end = ns_string.find(delim, start);
		}
		if (start != 0 && start != std::string::npos) {
		namespaces.push_back(ns_string.substr(start));
		}

		fprintf(
		fp,
		"// Generated file by bluetooth_flatbuffer bundler\n"
		"#pragma once\n"
		"#include <sys/types.h>\n"
		"#include <string>\n");
		for_each(
		namespaces.begin(), namespaces.end(), [fp](const std::string& s) { fprintf(fp, "namespace %s {\n", s.c_str()); });
		fprintf(
		fp,
		"extern const unsigned char* data;\n"
		"extern const size_t data_size;\n"
		"const std::string& GetBundledSchemaData();\n");
		for_each(namespaces.crbegin(), namespaces.crend(), [fp](const std::string& s) {
		fprintf(fp, "} // namespace %s\n", s.c_str());
		});
		fprintf(
		fp,
		"namespace {\n"
		"const unsigned char data_[] = {\n");

		for (auto i = 0; i < data_len; i++) {
		fprintf(fp, " 0x%02x", data[i]);
		if (i != data_len - 1) {
		fprintf(fp, ",");
		}
		if ((i + 1) % 16 == 0) {
		fprintf(fp, "\n");
		}
		}
		fprintf(fp, " };\n");
		fprintf(
		fp,
		"const std::string string_data_(data_, data_ + sizeof(data_));\n"
		"} // namespace\n");
		fprintf(fp, "const unsigned char* %s::data = data_;\n", opts.ns_name);
		fprintf(fp, "const size_t %s::data_size = %zd;\n", opts.ns_name, data_len);
		fprintf(fp, "const std::string& %s::GetBundledSchemaData() { return string_data_; }\n", opts.ns_name);
		}

		int ReadBundledSchema() {
		const char* filename = opts.filename;
		assert(filename != nullptr);

		std::string flatfile_data;
		if (!flatbuffers::LoadFile(filename, helper::AsBinaryFile, &flatfile_data)) {
		fprintf(stderr, "Unable to load schema data file:%s\n", filename);
		return -5;
		}

		auto bundle_schema = flatbuffers::GetRoot<BundleSchema>(flatfile_data.c_str());
		const flatbuffers::Vector<flatbuffers::Offset<BundleSchemaMap>>* map = bundle_schema->map();

		fprintf(stdout, "Bundle schema title:%s\n", bundle_schema->title()->c_str());
		fprintf(stdout, "Bundle schema root:%s\n", bundle_schema->root()->c_str());
		int cnt = 0;
		for (auto it = map->cbegin(); it != map->cend(); ++it, cnt++) {
		fprintf(stdout, " %d name:%s schema:%s\n", cnt, it->name()->c_str(), "schema");
		}
		return EXIT_SUCCESS;
		}

		int WriteBundledSchema() {
		const char* filename = opts.filename;
		assert(filename != nullptr);

		const char* main_root = opts.main_root;
		if (main_root == nullptr) {
		fprintf(stderr, "Must specify the name of the main root for this bundle\n");
		return EXIT_FAILURE;
		}

		std::vector<std::string> bfbs_filenames;
		for (int i = 0; i < opts.arg.c; i++) {
		bfbs_filenames.push_back(std::string(opts.arg.v[i]));
		}
		if (bfbs_filenames.empty()) {
		fprintf(stderr, "No bfbs files are specified to bundle\n");
		return EXIT_FAILURE;
		}

		flatbuffers::FlatBufferBuilder builder(1024);

		std::vector<flatbuffers::Offset<BundleSchemaMap>> vector_map;
		if (!CreateBinarySchemaBundle(&builder, bfbs_filenames, &vector_map)) {
		fprintf(stderr, "Unable to bundle schema bfbs files\n");
		return EXIT_FAILURE;
		}

		auto title = "Bundled schema tables";
		auto schema_offset = CreateBundleSchemaDirect(builder, title, main_root, &vector_map);
		builder.Finish(schema_offset);

		std::string final_filename(opts.gen);
		final_filename.append("/");
		final_filename.append(filename);
		if (!flatbuffers::SaveFile(
		final_filename.c_str(), (const char*)builder.GetBufferPointer(), builder.GetSize(), helper::AsBinaryFile)) {
		fprintf(stderr, "Unable to save file:%s\n", final_filename.c_str());
		return EXIT_FAILURE;
		}
		fprintf(
		stdout, "Successfully bundled %zd bfbs files into filename:%s\n", bfbs_filenames.size(), final_filename.c_str());

		std::string header(opts.gen);
		header += ("/" + std::string(opts.filename) + ".h");
		FILE* fp = fopen(header.c_str(), "w+");
		if (fp == nullptr) {
		fprintf(stdout, "Unable to open for writing header file:%s\n", header.c_str());
		return EXIT_FAILURE;
		}
		WriteHeaderFile(fp, builder.GetBufferPointer(), builder.GetSize());
		fclose(fp);
		return EXIT_SUCCESS;
		}

		int Usage(int argc, char** argv) {
		fprintf(
		stderr,
		"Usage: %s [-r \| -w] [-f <filename>] [-g <gen_out_path>] [-n <namespace> ] [-v] -m <main_root> <file.bfbs ...>\n",
		argv[0]);
		fprintf(stderr, " -r\|-w : Read or write a dumpsys file\n");
		fprintf(stderr, " -f : Filename bundled schema to read or write (default:%s)\n", kDefaultBundleDataFile);
		fprintf(stderr, " -g : Generated file output path\n");
		fprintf(stderr, " -n : Namespace to embed binary output bundle data source\n");
		fprintf(stderr, " -m : Name of the main root of this bundle\n");
		fprintf(stderr, " -v : Verbose printing mode\n");
		return EXIT_FAILURE;
		}

		void ParseArgs(int argc, char** argv) {
		int opt;
		int parsed_cnt = 1;
		while ((opt = getopt(argc, argv, "f:g:m:n:rvw")) != -1) {
		parsed_cnt++;
		switch (opt) {
		case 'f':
		opts.filename = optarg;
		parsed_cnt++;
		break;
		case 'g':
		opts.gen = optarg;
		parsed_cnt++;
		break;
		case 'm':
		opts.main_root = optarg;
		parsed_cnt++;
		break;
		case 'n':
		opts.ns_name = optarg;
		parsed_cnt++;
		break;
		case 'r':
		opts.read = true;
		break;
		case 'w':
		opts.write = true;
		break;
		case 'v':
		opts.verbose = true;
		break;
		default:
		exit(Usage(argc, argv));
		break;
		}
		}
		opts.arg.c = argc - parsed_cnt;
		opts.arg.v = &argv[parsed_cnt];
		}

system/gd/dumpsys/bundler/bundler.fbs

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		// Bundle Schema
		//
		// Describes a collection of binary flatbuffer schema.
		//

		namespace bluetooth.dumpsys;

		table BundleSchemaMap {
		name:string;
		data:[ubyte];
		}

		table BundleSchema {
		title:string;
		root:string;
		map:[BundleSchemaMap];
		}

		root_type BundleSchema;

system/gd/dumpsys/bundler/bundler.h

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		/*
		* Copyright 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.
		*/
		#pragma once

		namespace {
		constexpr char kDefaultBundleDataFile[] = "bundle_bfbs.bin";
		constexpr char kDefaultNamespace[] = "";
		constexpr char kDefaultNamespaceDelim[] = "::";
		} // namespace

		struct Opts {
		bool verbose{false};
		bool read{false};
		bool write{false};
		const char* filename{kDefaultBundleDataFile};
		const char* gen{nullptr};
		const char* main_root{nullptr};
		const char* ns_name{kDefaultNamespace};
		struct {
		int c{0};
		char** v{nullptr};
		} arg;
		};
		extern Opts opts;

		namespace {
		namespace helper { // Part of flatbuffers API
		constexpr bool AsBinaryFile = true;
		constexpr bool AsTextFile = false;
		} // namespace helper

		} // namespace

		/**
		* Read and parse a previously generated bundle data file
		*
		**/
		int ReadBundledSchema();

		/**
		* Generate a bundle data file from the binary flatbuffer schema
		* files provided as input
		*
		**/
		int WriteBundledSchema();

		/**
		* Print tool usage options
		*/
		int Usage(int argc, char** argv);

		/**
		* Parse tool usage options
		*/
		void ParseArgs(int argc, char** argv);