1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "SymbolDatabase.h" 18 19 #include <err.h> 20 #include <stdio.h> 21 #include <stdlib.h> 22 23 #include <fstream> 24 #include <streambuf> 25 #include <string> 26 #include <unordered_set> 27 28 #include <llvm/ADT/SmallVector.h> 29 #include <llvm/ADT/StringRef.h> 30 #include <llvm/Object/Binary.h> 31 #include <llvm/Object/ELFObjectFile.h> 32 33 #include "versioner.h" 34 35 using namespace llvm; 36 using namespace llvm::object; 37 38 std::unordered_set<std::string> getSymbols(const std::string& filename) { 39 std::unordered_set<std::string> result; 40 auto binaryOrError = createBinary(filename); 41 if (!binaryOrError) { 42 errx(1, "failed to open library at %s: %s\n", filename.c_str(), 43 llvm::toString(binaryOrError.takeError()).c_str()); 44 } 45 46 ELFObjectFileBase* elf = dyn_cast_or_null<ELFObjectFileBase>(binaryOrError.get().getBinary()); 47 if (!elf) { 48 errx(1, "failed to parse %s as ELF", filename.c_str()); 49 } 50 51 for (const ELFSymbolRef symbol : elf->getDynamicSymbolIterators()) { 52 Expected<StringRef> symbolNameOrError = symbol.getName(); 53 54 if (!symbolNameOrError) { 55 errx(1, "failed to get symbol name for symbol in %s: %s", filename.c_str(), 56 llvm::toString(symbolNameOrError.takeError()).c_str()); 57 } 58 59 result.insert(symbolNameOrError.get().str()); 60 } 61 62 return result; 63 } 64
