| /* Copyright (C) 2016 The Android Open Source Project |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This file implements interfaces from the file jvmti.h. This implementation |
| * is licensed under the same terms as the file jvmti.h. The |
| * copyright and license information for the file jvmti.h follows. |
| * |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef ART_RUNTIME_OPENJDKJVMTI_TI_REDEFINE_H_ |
| #define ART_RUNTIME_OPENJDKJVMTI_TI_REDEFINE_H_ |
| |
| #include <string> |
| |
| #include <jni.h> |
| |
| #include "art_jvmti.h" |
| #include "art_method.h" |
| #include "class_linker.h" |
| #include "dex_file.h" |
| #include "gc_root-inl.h" |
| #include "globals.h" |
| #include "jni_env_ext-inl.h" |
| #include "jvmti.h" |
| #include "linear_alloc.h" |
| #include "mem_map.h" |
| #include "mirror/array-inl.h" |
| #include "mirror/array.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/class.h" |
| #include "mirror/class_loader-inl.h" |
| #include "mirror/string-inl.h" |
| #include "oat_file.h" |
| #include "obj_ptr.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "stack.h" |
| #include "thread_list.h" |
| #include "transform.h" |
| #include "utf.h" |
| #include "utils/dex_cache_arrays_layout-inl.h" |
| |
| namespace openjdkjvmti { |
| |
| // Class that can redefine a single class's methods. |
| class Redefiner { |
| public: |
| // Redefine the given class with the given dex data. Note this function does not take ownership of |
| // the dex_data pointer. It is not used after this call however and may be freed if desired. |
| // The caller is responsible for freeing it. The runtime makes its own copy of the data. |
| static jvmtiError RedefineClass(ArtJvmTiEnv* env, |
| art::Runtime* runtime, |
| art::Thread* self, |
| jclass klass, |
| const std::string& original_dex_location, |
| jint data_len, |
| unsigned char* dex_data, |
| std::string* error_msg); |
| |
| private: |
| jvmtiError result_; |
| art::Runtime* runtime_; |
| art::Thread* self_; |
| // Kept as a jclass since we have weird run-state changes that make keeping it around as a |
| // mirror::Class difficult and confusing. |
| jclass klass_; |
| std::unique_ptr<const art::DexFile> dex_file_; |
| std::string* error_msg_; |
| char* class_sig_; |
| |
| // TODO Maybe change jclass to a mirror::Class |
| Redefiner(art::Runtime* runtime, |
| art::Thread* self, |
| jclass klass, |
| char* class_sig, |
| std::unique_ptr<const art::DexFile>& redefined_dex_file, |
| std::string* error_msg) |
| : result_(ERR(INTERNAL)), |
| runtime_(runtime), |
| self_(self), |
| klass_(klass), |
| dex_file_(std::move(redefined_dex_file)), |
| error_msg_(error_msg), |
| class_sig_(class_sig) { } |
| |
| static std::unique_ptr<art::MemMap> MoveDataToMemMap(const std::string& original_location, |
| jint data_len, |
| unsigned char* dex_data, |
| std::string* error_msg); |
| |
| // TODO Put on all the lock qualifiers. |
| jvmtiError Run() REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| bool FinishRemainingAllocations( |
| /*out*/art::MutableHandle<art::mirror::ClassLoader>* source_class_loader, |
| /*out*/art::MutableHandle<art::mirror::Object>* source_dex_file_obj, |
| /*out*/art::MutableHandle<art::mirror::LongArray>* new_dex_file_cookie, |
| /*out*/art::MutableHandle<art::mirror::DexCache>* new_dex_cache) |
| REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| // Preallocates all needed allocations in klass so that we can pause execution safely. |
| // TODO We should be able to free the arrays if they end up not being used. Investigate doing this |
| // in the future. For now we will just take the memory hit. |
| bool EnsureClassAllocationsFinished() REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| art::mirror::ClassLoader* GetClassLoader() REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| // This finds the java.lang.DexFile we will add the native DexFile to as part of the classpath. |
| // TODO Make sure the DexFile object returned is the one that the klass_ actually comes from. |
| art::mirror::Object* FindSourceDexFileObject(art::Handle<art::mirror::ClassLoader> loader) |
| REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| art::mirror::Class* GetMirrorClass() REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| // Allocates and fills the new DexFileCookie |
| art::mirror::LongArray* AllocateDexFileCookie(art::Handle<art::mirror::Object> java_dex_file_obj) |
| REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| art::mirror::DexCache* CreateNewDexCache(art::Handle<art::mirror::ClassLoader> loader) |
| REQUIRES_SHARED(art::Locks::mutator_lock_); |
| |
| void RecordFailure(jvmtiError result, const std::string& error_msg); |
| |
| // TODO Actually write this. |
| // This will check that no constraints are violated (more than 1 class in dex file, any changes in |
| // number/declaration of methods & fields, changes in access flags, etc.) |
| bool EnsureRedefinitionIsValid() { |
| LOG(WARNING) << "Redefinition is not checked for validity currently"; |
| return true; |
| } |
| |
| bool UpdateJavaDexFile(art::ObjPtr<art::mirror::Object> java_dex_file, |
| art::ObjPtr<art::mirror::LongArray> new_cookie, |
| /*out*/art::ObjPtr<art::mirror::LongArray>* original_cookie) |
| REQUIRES(art::Locks::mutator_lock_); |
| |
| void RestoreJavaDexFile(art::ObjPtr<art::mirror::Object> java_dex_file, |
| art::ObjPtr<art::mirror::LongArray> original_cookie) |
| REQUIRES(art::Locks::mutator_lock_); |
| |
| bool UpdateFields(art::ObjPtr<art::mirror::Class> mclass) |
| REQUIRES(art::Locks::mutator_lock_); |
| |
| bool UpdateMethods(art::ObjPtr<art::mirror::Class> mclass, |
| art::ObjPtr<art::mirror::DexCache> new_dex_cache, |
| const art::DexFile::ClassDef& class_def) |
| REQUIRES(art::Locks::mutator_lock_); |
| |
| bool UpdateClass(art::ObjPtr<art::mirror::Class> mclass, |
| art::ObjPtr<art::mirror::DexCache> new_dex_cache) |
| REQUIRES(art::Locks::mutator_lock_); |
| }; |
| |
| } // namespace openjdkjvmti |
| |
| #endif // ART_RUNTIME_OPENJDKJVMTI_TI_REDEFINE_H_ |
