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 #ifndef ART_RUNTIME_OPENJDKJVMTI_TI_CLASS_DEFINITION_H_ 33 #define ART_RUNTIME_OPENJDKJVMTI_TI_CLASS_DEFINITION_H_ 34 35 #include "art_jvmti.h" 36 37 namespace openjdkjvmti { 38 39 // A struct that stores data needed for redefining/transforming classes. This structure should only 40 // even be accessed from a single thread and must not survive past the completion of the 41 // redefinition/retransformation function that created it. 42 class ArtClassDefinition { 43 public: ArtClassDefinition()44 ArtClassDefinition() 45 : klass_(nullptr), 46 loader_(nullptr), 47 name_(), 48 protection_domain_(nullptr), 49 dex_len_(0), 50 dex_data_(nullptr), 51 original_dex_file_memory_(nullptr), 52 original_dex_file_(), 53 redefined_(false) {} 54 55 jvmtiError Init(ArtJvmTiEnv* env, jclass klass); 56 jvmtiError Init(ArtJvmTiEnv* env, const jvmtiClassDefinition& def); 57 58 ArtClassDefinition(ArtClassDefinition&& o) = default; 59 ArtClassDefinition& operator=(ArtClassDefinition&& o) = default; 60 SetNewDexData(ArtJvmTiEnv * env,jint new_dex_len,unsigned char * new_dex_data)61 void SetNewDexData(ArtJvmTiEnv* env, jint new_dex_len, unsigned char* new_dex_data) { 62 DCHECK(IsInitialized()); 63 if (new_dex_data == nullptr) { 64 return; 65 } else if (new_dex_data != dex_data_.get() || new_dex_len != dex_len_) { 66 dex_len_ = new_dex_len; 67 dex_data_ = MakeJvmtiUniquePtr(env, new_dex_data); 68 } 69 } 70 GetNewOriginalDexFile()71 art::ArraySlice<const unsigned char> GetNewOriginalDexFile() const { 72 DCHECK(IsInitialized()); 73 if (redefined_) { 74 return original_dex_file_; 75 } else { 76 return art::ArraySlice<const unsigned char>(); 77 } 78 } 79 80 bool IsModified() const; 81 IsInitialized()82 bool IsInitialized() const { 83 return klass_ != nullptr; 84 } 85 GetClass()86 jclass GetClass() const { 87 DCHECK(IsInitialized()); 88 return klass_; 89 } 90 GetLoader()91 jobject GetLoader() const { 92 DCHECK(IsInitialized()); 93 return loader_; 94 } 95 GetName()96 const std::string& GetName() const { 97 DCHECK(IsInitialized()); 98 return name_; 99 } 100 GetProtectionDomain()101 jobject GetProtectionDomain() const { 102 DCHECK(IsInitialized()); 103 return protection_domain_; 104 } 105 GetDexData()106 art::ArraySlice<const unsigned char> GetDexData() const { 107 DCHECK(IsInitialized()); 108 return art::ArraySlice<const unsigned char>(dex_data_.get(), dex_len_); 109 } 110 111 private: 112 jvmtiError InitCommon(ArtJvmTiEnv* env, jclass klass); 113 114 jclass klass_; 115 jobject loader_; 116 std::string name_; 117 jobject protection_domain_; 118 jint dex_len_; 119 JvmtiUniquePtr<unsigned char> dex_data_; 120 JvmtiUniquePtr<unsigned char> original_dex_file_memory_; 121 art::ArraySlice<const unsigned char> original_dex_file_; 122 bool redefined_; 123 124 DISALLOW_COPY_AND_ASSIGN(ArtClassDefinition); 125 }; 126 127 } // namespace openjdkjvmti 128 129 #endif // ART_RUNTIME_OPENJDKJVMTI_TI_CLASS_DEFINITION_H_ 130