1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ART_RUNTIME_INTERPRETER_MTERP_MTERP_H_
18 #define ART_RUNTIME_INTERPRETER_MTERP_MTERP_H_
19 
20 #include <cstddef>
21 #include <cstdint>
22 
23 #include "base/globals.h"
24 
25 /*
26  * Mterp assembly handler bases
27  */
28 extern "C" void* artMterpAsmInstructionStart[];
29 extern "C" void* artMterpAsmInstructionEnd[];
30 
31 extern "C" void* artNterpAsmInstructionStart[];
32 extern "C" void* artNterpAsmInstructionEnd[];
33 
34 namespace art {
35 
36 class ArtMethod;
37 class Thread;
38 
39 namespace interpreter {
40 
41 void InitMterpTls(Thread* self);
42 void CheckMterpAsmConstants();
43 void CheckNterpAsmConstants();
44 bool CanUseMterp();
45 bool IsNterpSupported();
46 bool CanRuntimeUseNterp();
47 bool CanMethodUseNterp(ArtMethod* method);
48 const void* GetNterpEntryPoint();
49 
50 // Poison value for TestExportPC.  If we segfault with this value, it means that a mterp
51 // handler for a recent opcode failed to export the Dalvik PC prior to a possible exit from
52 // the mterp environment.
53 constexpr uintptr_t kExportPCPoison = 0xdead00ff;
54 // Set true to enable poison testing of ExportPC.  Uses Alt interpreter.
55 constexpr bool kTestExportPC = false;
56 
57 constexpr size_t kMterpHandlerSize = 128;
58 
59 // The maximum we will allow an nterp frame to be.
60 constexpr size_t kMaxNterpFrame = 3 * KB;
61 
62 }  // namespace interpreter
63 }  // namespace art
64 
65 #endif  // ART_RUNTIME_INTERPRETER_MTERP_MTERP_H_
66