mterp.h revision 8cf9cb386cd9286d67e879f1ee501ec00d72a4e1 
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/*
24 * Mterp assembly handler bases
25 */
26extern "C" void* artMterpAsmInstructionStart[];
27extern "C" void* artMterpAsmInstructionEnd[];
28extern "C" void* artMterpAsmAltInstructionStart[];
29extern "C" void* artMterpAsmAltInstructionEnd[];
30
31namespace art {
32
33class Thread;
34
35namespace interpreter {
36
37void InitMterpTls(Thread* self);
38void CheckMterpAsmConstants();
39
40// The return type should be 'bool' but our assembly stubs expect 'bool'
41// to be zero-extended to the whole register and that's broken on x86-64
42// as a 'bool' is returned in 'al' and the rest of 'rax' is garbage.
43// TODO: Fix mterp and stubs and revert this workaround. http://b/30232671
44extern "C" size_t MterpShouldSwitchInterpreters();
45
46// Poison value for TestExportPC.  If we segfault with this value, it means that a mterp
47// handler for a recent opcode failed to export the Dalvik PC prior to a possible exit from
48// the mterp environment.
49constexpr uintptr_t kExportPCPoison = 0xdead00ff;
50// Set true to enable poison testing of ExportPC.  Uses Alt interpreter.
51constexpr bool kTestExportPC = false;
52
53}  // namespace interpreter
54}  // namespace art
55
56#endif  // ART_RUNTIME_INTERPRETER_MTERP_MTERP_H_
57