blob: accc4569571bc36f5c9467137d078513841893e7 [file] [log] [blame]
/* Copyright (C) 2017 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_OPENJDKJVMTI_TI_CLASS_DEFINITION_H_
#define ART_OPENJDKJVMTI_TI_CLASS_DEFINITION_H_
#include "art_jvmti.h"
#include "base/array_ref.h"
namespace openjdkjvmti {
// A struct that stores data needed for redefining/transforming classes. This structure should only
// even be accessed from a single thread and must not survive past the completion of the
// redefinition/retransformation function that created it.
class ArtClassDefinition {
public:
ArtClassDefinition()
: klass_(nullptr),
loader_(nullptr),
name_(),
protection_domain_(nullptr),
dex_len_(0),
dex_data_(nullptr),
original_dex_file_memory_(nullptr),
original_dex_file_(),
redefined_(false) {}
jvmtiError Init(ArtJvmTiEnv* env, jclass klass);
jvmtiError Init(ArtJvmTiEnv* env, const jvmtiClassDefinition& def);
ArtClassDefinition(ArtClassDefinition&& o) = default;
ArtClassDefinition& operator=(ArtClassDefinition&& o) = default;
void SetNewDexData(ArtJvmTiEnv* env, jint new_dex_len, unsigned char* new_dex_data) {
DCHECK(IsInitialized());
if (new_dex_data == nullptr) {
return;
} else if (new_dex_data != dex_data_.get() || new_dex_len != dex_len_) {
dex_len_ = new_dex_len;
dex_data_ = MakeJvmtiUniquePtr(env, new_dex_data);
}
}
art::ArrayRef<const unsigned char> GetNewOriginalDexFile() const {
DCHECK(IsInitialized());
if (redefined_) {
return original_dex_file_;
} else {
return art::ArrayRef<const unsigned char>();
}
}
bool IsModified() const;
bool IsInitialized() const {
return klass_ != nullptr;
}
jclass GetClass() const {
DCHECK(IsInitialized());
return klass_;
}
jobject GetLoader() const {
DCHECK(IsInitialized());
return loader_;
}
const std::string& GetName() const {
DCHECK(IsInitialized());
return name_;
}
jobject GetProtectionDomain() const {
DCHECK(IsInitialized());
return protection_domain_;
}
art::ArrayRef<const unsigned char> GetDexData() const {
DCHECK(IsInitialized());
return art::ArrayRef<const unsigned char>(dex_data_.get(), dex_len_);
}
private:
jvmtiError InitCommon(ArtJvmTiEnv* env, jclass klass);
jclass klass_;
jobject loader_;
std::string name_;
jobject protection_domain_;
jint dex_len_;
JvmtiUniquePtr<unsigned char> dex_data_;
JvmtiUniquePtr<unsigned char> original_dex_file_memory_;
art::ArrayRef<const unsigned char> original_dex_file_;
bool redefined_;
DISALLOW_COPY_AND_ASSIGN(ArtClassDefinition);
};
} // namespace openjdkjvmti
#endif // ART_OPENJDKJVMTI_TI_CLASS_DEFINITION_H_