1 /* Copyright (C) 2017 The Android Open Source Project 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This file implements interfaces from the file jvmti.h. This implementation 5 * is licensed under the same terms as the file jvmti.h. The 6 * copyright and license information for the file jvmti.h follows. 7 * 8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. 9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 10 * 11 * This code is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License version 2 only, as 13 * published by the Free Software Foundation. Oracle designates this 14 * particular file as subject to the "Classpath" exception as provided 15 * by Oracle in the LICENSE file that accompanied this code. 16 * 17 * This code is distributed in the hope that it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20 * version 2 for more details (a copy is included in the LICENSE file that 21 * accompanied this code). 22 * 23 * You should have received a copy of the GNU General Public License version 24 * 2 along with this work; if not, write to the Free Software Foundation, 25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 26 * 27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 28 * or visit www.oracle.com if you need additional information or have any 29 * questions. 30 */ 31 32 #include "fixed_up_dex_file.h" 33 #include "dex_file-inl.h" 34 35 // Runtime includes. 36 #include "dex_to_dex_decompiler.h" 37 #include "oat_file.h" 38 #include "vdex_file.h" 39 40 namespace openjdkjvmti { 41 42 static void RecomputeDexChecksum(art::DexFile* dex_file) 43 REQUIRES_SHARED(art::Locks::mutator_lock_) { 44 reinterpret_cast<art::DexFile::Header*>(const_cast<uint8_t*>(dex_file->Begin()))->checksum_ = 45 dex_file->CalculateChecksum(); 46 } 47 48 static void DoDexUnquicken(const art::DexFile& new_dex_file, const art::DexFile& original_dex_file) 49 REQUIRES_SHARED(art::Locks::mutator_lock_) { 50 const art::OatDexFile* oat_dex = original_dex_file.GetOatDexFile(); 51 if (oat_dex == nullptr) { 52 return; 53 } 54 const art::OatFile* oat_file = oat_dex->GetOatFile(); 55 if (oat_file == nullptr) { 56 return; 57 } 58 const art::VdexFile* vdex = oat_file->GetVdexFile(); 59 if (vdex == nullptr) { 60 return; 61 } 62 vdex->FullyUnquickenDexFile(new_dex_file, original_dex_file); 63 } 64 65 std::unique_ptr<FixedUpDexFile> FixedUpDexFile::Create(const art::DexFile& original) { 66 // Copy the data into mutable memory. 67 std::vector<unsigned char> data; 68 data.resize(original.Size()); 69 memcpy(data.data(), original.Begin(), original.Size()); 70 std::string error; 71 std::unique_ptr<const art::DexFile> new_dex_file(art::DexFile::Open( 72 data.data(), 73 data.size(), 74 /*location*/"Unquickening_dexfile.dex", 75 /*location_checksum*/0, 76 /*oat_dex_file*/nullptr, 77 /*verify*/false, 78 /*verify_checksum*/false, 79 &error)); 80 if (new_dex_file.get() == nullptr) { 81 LOG(ERROR) << "Unable to open dex file from memory for unquickening! error: " << error; 82 return nullptr; 83 } 84 85 DoDexUnquicken(*new_dex_file, original); 86 RecomputeDexChecksum(const_cast<art::DexFile*>(new_dex_file.get())); 87 std::unique_ptr<FixedUpDexFile> ret(new FixedUpDexFile(std::move(new_dex_file), std::move(data))); 88 return ret; 89 } 90 91 } // namespace openjdkjvmti 92
