runtime/interpreter/mterp/mterp.h

/*
 * 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_INTERPRETER_MTERP_MTERP_H_
#define ART_RUNTIME_INTERPRETER_MTERP_MTERP_H_

#include <cstddef>
#include <cstdint>

#include "base/globals.h"

/*
 * Mterp assembly handler bases
 */
extern "C" void* artMterpAsmInstructionStart[];
extern "C" void* artMterpAsmInstructionEnd[];

extern "C" void* artNterpAsmInstructionStart[];
extern "C" void* artNterpAsmInstructionEnd[];

namespace art {

class ArtMethod;
class Thread;

namespace interpreter {

void InitMterpTls(Thread* self);
void CheckMterpAsmConstants();
void CheckNterpAsmConstants();
bool CanUseMterp();
bool IsNterpSupported();
bool CanRuntimeUseNterp();
bool CanMethodUseNterp(ArtMethod* method);
const void* GetNterpEntryPoint();

// Poison value for TestExportPC.  If we segfault with this value, it means that a mterp
// handler for a recent opcode failed to export the Dalvik PC prior to a possible exit from
// the mterp environment.
constexpr uintptr_t kExportPCPoison = 0xdead00ff;
// Set true to enable poison testing of ExportPC.  Uses Alt interpreter.
constexpr bool kTestExportPC = false;

constexpr size_t kMterpHandlerSize = 128;

// The maximum we will allow an nterp frame to be.
constexpr size_t kMaxNterpFrame = 3 * KB;

}  // namespace interpreter
}  // namespace art

#endif  // ART_RUNTIME_INTERPRETER_MTERP_MTERP_H_