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_OPENJDKJVMTI_TI_CLASS_LOADER_H_ 33 #define ART_OPENJDKJVMTI_TI_CLASS_LOADER_H_ 34 35 #include <string> 36 37 #include <jni.h> 38 39 #include "base/globals.h" 40 #include "base/mutex.h" 41 #include "jvmti.h" 42 #include "mirror/array.h" 43 44 namespace art { 45 46 class DexFile; 47 template <class MirrorType> class Handle; 48 template <class MirrorType> class ObjPtr; 49 class Thread; 50 51 } // namespace art 52 53 namespace openjdkjvmti { 54 55 // Class that can redefine a single class's methods. 56 // TODO We should really make this be driven by an outside class so we can do multiple classes at 57 // the same time and have less required cleanup. 58 class ClassLoaderHelper { 59 public: 60 static bool AddToClassLoader(art::Thread* self, 61 art::Handle<art::mirror::ClassLoader> loader, 62 const art::DexFile* dex_file) 63 REQUIRES_SHARED(art::Locks::mutator_lock_); 64 65 // Finds a java.lang.DexFile object that is associated with the given ClassLoader. Each of these 66 // j.l.DexFile objects holds several art::DexFile*s in it. 67 // TODO This should return the actual source java.lang.DexFile object for the klass being loaded. 68 static art::ObjPtr<art::mirror::Object> FindSourceDexFileObject( 69 art::Thread* self, art::Handle<art::mirror::ClassLoader> loader) 70 REQUIRES_SHARED(art::Locks::mutator_lock_); 71 72 // Calls visitor on each java.lang.DexFile associated with the given loader. The visitor should 73 // return true to continue on to the next DexFile or false to stop iterating. 74 template<typename Visitor> 75 static inline void VisitDexFileObjects(art::Thread* self, 76 art::Handle<art::mirror::ClassLoader> loader, 77 const Visitor& visitor) 78 REQUIRES_SHARED(art::Locks::mutator_lock_); 79 80 static art::ObjPtr<art::mirror::LongArray> GetDexFileCookie( 81 art::Handle<art::mirror::Object> java_dex_file) REQUIRES_SHARED(art::Locks::mutator_lock_); 82 83 static art::ObjPtr<art::mirror::LongArray> AllocateNewDexFileCookie( 84 art::Thread* self, 85 art::Handle<art::mirror::LongArray> old_dex_file_cookie, 86 const art::DexFile* new_dex_file) REQUIRES_SHARED(art::Locks::mutator_lock_); 87 88 static void UpdateJavaDexFile(art::ObjPtr<art::mirror::Object> java_dex_file, 89 art::ObjPtr<art::mirror::LongArray> new_cookie) 90 REQUIRES(art::Roles::uninterruptible_) REQUIRES_SHARED(art::Locks::mutator_lock_); 91 92 private: 93 static art::ObjPtr<art::mirror::ObjectArray<art::mirror::Object>> GetDexElementList( 94 art::Thread* self, art::Handle<art::mirror::ClassLoader> loader) 95 REQUIRES_SHARED(art::Locks::mutator_lock_); 96 }; 97 98 } // namespace openjdkjvmti 99 #endif // ART_OPENJDKJVMTI_TI_CLASS_LOADER_H_ 100
