/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "SymbolDatabase.h"
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#include "SymbolFileParser.h"
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fstream>
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#include <streambuf>
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#include <string>
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#include <unordered_set>
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#include <llvm/ADT/SmallVector.h>
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#include <llvm/ADT/StringRef.h>
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#include <llvm/Object/Binary.h>
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#include <llvm/Object/ELFObjectFile.h>
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#include "versioner.h"
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using namespace llvm;
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using namespace llvm::object;
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std::unordered_set<std::string> getSymbols(const std::string& filename) {
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std::unordered_set<std::string> result;
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auto binaryOrError = createBinary(filename);
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if (!binaryOrError) {
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errx(1, "failed to open library at %s: %s\n", filename.c_str(),
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llvm::toString(binaryOrError.takeError()).c_str());
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}
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ELFObjectFileBase* elf = dyn_cast_or_null<ELFObjectFileBase>(binaryOrError.get().getBinary());
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if (!elf) {
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errx(1, "failed to parse %s as ELF", filename.c_str());
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}
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for (const ELFSymbolRef symbol : elf->getDynamicSymbolIterators()) {
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Expected<StringRef> symbolNameOrError = symbol.getName();
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if (!symbolNameOrError) {
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errx(1, "failed to get symbol name for symbol in %s: %s", filename.c_str(),
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llvm::toString(symbolNameOrError.takeError()).c_str());
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}
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result.insert(symbolNameOrError.get().str());
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}
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return result;
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}
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static std::map<std::string, NdkSymbolType> parsePlatform(const CompilationType& type,
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const std::string& platform_dir) {
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static const std::pair<const char*, bool> wanted_files[] = {
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{"crtbegin.map.txt", false},
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{"libc.map.txt", true},
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};
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std::map<std::string, NdkSymbolType> result;
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for (auto&& [filename, required] : wanted_files) {
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std::string path = platform_dir + "/" + filename;
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std::optional<SymbolMap> symbols = parseSymbolFile(path, type);
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if (!symbols) {
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if (required) {
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errx(1, "error: failed to load: %s", path.c_str());
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}
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continue;
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}
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for (auto&& [symbol_name, symbol_type] : *symbols) {
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if (symbol_name.empty()) {
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continue;
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}
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if (result.count(symbol_name) != 0) {
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if (strict) {
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printf("duplicated symbol '%s' in '%s'\n", symbol_name.c_str(), path.c_str());
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}
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}
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result[symbol_name] = symbol_type;
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}
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}
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return result;
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}
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std::optional<NdkSymbolDatabase> parsePlatforms(const std::set<CompilationType>& types,
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const std::string& platform_dir) {
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NdkSymbolDatabase result;
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for (const CompilationType& type : types) {
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std::map<std::string, NdkSymbolType> symbols = parsePlatform(type, platform_dir);
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for (const auto& it : symbols) {
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result[it.first][type] = it.second;
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}
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}
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return std::make_optional(std::move(result));
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}
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