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/*
* Copyright (C) 2016 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.
*/
#ifndef ART_RUNTIME_MIRROR_EMULATED_STACK_FRAME_H_
#define ART_RUNTIME_MIRROR_EMULATED_STACK_FRAME_H_
#include "dex_instruction.h"
#include "method_type.h"
#include "object.h"
#include "stack.h"
#include "string.h"
#include "utils.h"
namespace art {
struct EmulatedStackFrameOffsets;
namespace mirror {
// C++ mirror of dalvik.system.EmulatedStackFrame
class MANAGED EmulatedStackFrame : public Object {
public:
// Creates an emulated stack frame whose type is |frame_type| from
// a shadow frame.
template <bool is_range>
static mirror::EmulatedStackFrame* CreateFromShadowFrameAndArgs(
Thread* self,
Handle<mirror::MethodType> args_type,
Handle<mirror::MethodType> frame_type,
const ShadowFrame& caller_frame,
const uint32_t first_src_reg,
const uint32_t (&arg)[Instruction::kMaxVarArgRegs]) REQUIRES_SHARED(Locks::mutator_lock_);
// Writes the contents of this emulated stack frame to the |callee_frame|
// whose type is |callee_type|, starting at |first_dest_reg|.
bool WriteToShadowFrame(
Thread* self,
Handle<mirror::MethodType> callee_type,
const uint32_t first_dest_reg,
ShadowFrame* callee_frame) REQUIRES_SHARED(Locks::mutator_lock_);
// Sets |value| to the return value written to this emulated stack frame (if any).
void GetReturnValue(Thread* self, JValue* value) REQUIRES_SHARED(Locks::mutator_lock_);
// Sets the return value slot of this emulated stack frame to |value|.
void SetReturnValue(Thread* self, const JValue& value) REQUIRES_SHARED(Locks::mutator_lock_);
mirror::MethodType* GetType() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetFieldObject<MethodType>(OFFSET_OF_OBJECT_MEMBER(EmulatedStackFrame, type_));
}
mirror::Object* GetReceiver() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetReferences()->Get(0);
}
static void SetClass(Class* klass) REQUIRES_SHARED(Locks::mutator_lock_);
static void ResetClass() REQUIRES_SHARED(Locks::mutator_lock_);
static void VisitRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
private:
static mirror::Class* StaticClass() REQUIRES_SHARED(Locks::mutator_lock_) {
return static_class_.Read();
}
mirror::ObjectArray<mirror::Object>* GetReferences() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetFieldObject<mirror::ObjectArray<mirror::Object>>(
OFFSET_OF_OBJECT_MEMBER(EmulatedStackFrame, references_));
}
mirror::ByteArray* GetStackFrame() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetFieldObject<mirror::ByteArray>(
OFFSET_OF_OBJECT_MEMBER(EmulatedStackFrame, stack_frame_));
}
static MemberOffset CallsiteTypeOffset() {
return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, callsite_type_));
}
static MemberOffset TypeOffset() {
return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, type_));
}
static MemberOffset ReferencesOffset() {
return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, references_));
}
static MemberOffset StackFrameOffset() {
return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, stack_frame_));
}
HeapReference<mirror::MethodType> callsite_type_;
HeapReference<mirror::ObjectArray<mirror::Object>> references_;
HeapReference<mirror::ByteArray> stack_frame_;
HeapReference<mirror::MethodType> type_;
static GcRoot<mirror::Class> static_class_; // dalvik.system.EmulatedStackFrame.class
friend struct art::EmulatedStackFrameOffsets; // for verifying offset information
DISALLOW_IMPLICIT_CONSTRUCTORS(EmulatedStackFrame);
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_EMULATED_STACK_FRAME_H_
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