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 "art_jvmti.h" 40 #include "art_method.h" 41 #include "base/array_slice.h" 42 #include "class_linker.h" 43 #include "dex/dex_file.h" 44 #include "dex/utf.h" 45 #include "gc_root-inl.h" 46 #include "globals.h" 47 #include "jni_env_ext-inl.h" 48 #include "jvmti.h" 49 #include "linear_alloc.h" 50 #include "mem_map.h" 51 #include "mirror/array-inl.h" 52 #include "mirror/array.h" 53 #include "mirror/class-inl.h" 54 #include "mirror/class.h" 55 #include "mirror/class_loader-inl.h" 56 #include "mirror/string-inl.h" 57 #include "oat_file.h" 58 #include "obj_ptr.h" 59 #include "scoped_thread_state_change-inl.h" 60 #include "stack.h" 61 #include "thread_list.h" 62 #include "ti_class_definition.h" 63 #include "transform.h" 64 #include "utils/dex_cache_arrays_layout-inl.h" 65 66 namespace openjdkjvmti { 67 68 // Class that can redefine a single class's methods. 69 // TODO We should really make this be driven by an outside class so we can do multiple classes at 70 // the same time and have less required cleanup. 71 class ClassLoaderHelper { 72 public: 73 static bool AddToClassLoader(art::Thread* self, 74 art::Handle<art::mirror::ClassLoader> loader, 75 const art::DexFile* dex_file) 76 REQUIRES_SHARED(art::Locks::mutator_lock_); 77 78 // Finds a java.lang.DexFile object that is associated with the given ClassLoader. Each of these 79 // j.l.DexFile objects holds several art::DexFile*s in it. 80 // TODO This should return the actual source java.lang.DexFile object for the klass being loaded. 81 static art::ObjPtr<art::mirror::Object> FindSourceDexFileObject( 82 art::Thread* self, art::Handle<art::mirror::ClassLoader> loader) 83 REQUIRES_SHARED(art::Locks::mutator_lock_); 84 85 // Calls visitor on each java.lang.DexFile associated with the given loader. The visitor should 86 // return true to continue on to the next DexFile or false to stop iterating. 87 template<typename Visitor> 88 static inline void VisitDexFileObjects(art::Thread* self, 89 art::Handle<art::mirror::ClassLoader> loader, 90 const Visitor& visitor) 91 REQUIRES_SHARED(art::Locks::mutator_lock_); 92 93 static art::ObjPtr<art::mirror::LongArray> GetDexFileCookie( 94 art::Handle<art::mirror::Object> java_dex_file) REQUIRES_SHARED(art::Locks::mutator_lock_); 95 96 static art::ObjPtr<art::mirror::LongArray> AllocateNewDexFileCookie( 97 art::Thread* self, 98 art::Handle<art::mirror::LongArray> old_dex_file_cookie, 99 const art::DexFile* new_dex_file) REQUIRES_SHARED(art::Locks::mutator_lock_); 100 101 static void UpdateJavaDexFile(art::ObjPtr<art::mirror::Object> java_dex_file, 102 art::ObjPtr<art::mirror::LongArray> new_cookie) 103 REQUIRES(art::Roles::uninterruptible_) REQUIRES_SHARED(art::Locks::mutator_lock_); 104 105 private: 106 static art::ObjPtr<art::mirror::ObjectArray<art::mirror::Object>> GetDexElementList( 107 art::Thread* self, art::Handle<art::mirror::ClassLoader> loader) 108 REQUIRES_SHARED(art::Locks::mutator_lock_); 109 }; 110 111 } // namespace openjdkjvmti 112 #endif // ART_OPENJDKJVMTI_TI_CLASS_LOADER_H_ 113