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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cstdio>
#include <memory>
#include <mutex>
#include <string>
#include <vector>
#include "class_linker.h"
#include "class_root.h"
#include "jni.h"
#include "jni/jni_internal.h"
#include "mirror/class.h"
#include "mirror/method_handle_impl.h"
#include "mirror/object-inl.h"
#include "mirror/object_array-alloc-inl.h"
#include "reflection.h"
#include "reflective_handle.h"
#include "reflective_handle_scope-inl.h"
#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "thread-inl.h"
namespace art {
namespace Test1985StructuralRedefineStackScope {
extern "C" JNICALL jobject JNIEXPORT Java_Main_NativeFieldScopeCheck(JNIEnv* env,
jclass,
jobject field,
jobject runnable) {
jfieldID fid = env->FromReflectedField(field);
jclass runnable_klass = env->FindClass("java/lang/Runnable");
jmethodID run = env->GetMethodID(runnable_klass, "run", "()V");
ScopedObjectAccess soa(Thread::Current());
StackHandleScope<4> hs(soa.Self());
StackArtFieldHandleScope<1> fhs(soa.Self());
StackArtFieldHandleScope<1> bhs(soa.Self());
ReflectiveHandle<ArtField> rf(fhs.NewHandle(jni::DecodeArtField(fid)));
ReflectiveHandle<ArtField> bf(bhs.NewHandle(jni::DecodeArtField(fid)));
ArtField* pre_ptr = rf.Get();
{
ScopedThreadSuspension sts(soa.Self(), ThreadState::kNative);
// Upcall to perform redefinition.
env->CallVoidMethod(runnable, run);
}
Handle<mirror::ObjectArray<mirror::Class>> mt_arr(
hs.NewHandle(mirror::ObjectArray<mirror::Class>::Alloc(
soa.Self(),
Runtime::Current()->GetClassLinker()->FindArrayClass(soa.Self(),
GetClassRoot<mirror::Class>()),
0)));
Handle<mirror::MethodType> mt(hs.NewHandle(mirror::MethodType::Create(
soa.Self(), hs.NewHandle(GetClassRoot<mirror::Object>()), mt_arr)));
Handle<mirror::MethodHandleImpl> mhi(hs.NewHandle(
mirror::MethodHandleImpl::Create(soa.Self(),
reinterpret_cast<uintptr_t>(rf.Get()),
(rf->IsStatic() ? mirror::MethodHandle::Kind::kStaticGet
: mirror::MethodHandle::Kind::kInstanceGet),
mt)));
CHECK_EQ(rf.Get(), bf.Get()) << "rf: " << rf->PrettyField() << " bf: " << bf->PrettyField();
// TODO Modify this to work for when run doesn't cause a change.
CHECK_NE(pre_ptr, rf.Get()) << "pre_ptr: " << pre_ptr->PrettyField()
<< " rf: " << rf->PrettyField();
CHECK_EQ(fid, jni::EncodeArtField(rf));
return soa.AddLocalReference<jobject>(mhi.Get());
}
} // namespace Test1985StructuralRedefineStackScope
} // namespace art
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