| Andreas Gampe | 217488a | 2017-09-18 08:34:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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_READ_BARRIER_CONFIG_H_ |
| 18 | #define ART_RUNTIME_READ_BARRIER_CONFIG_H_ |
| 19 | |
| 20 | // This is a mixed C-C++ header file that has a global section at the start |
| 21 | // and a C++ section at the end, because asm_support.h is a C header file and |
| 22 | // cannot include any C++ syntax. |
| 23 | |
| 24 | // Global (C) part. |
| 25 | |
| 26 | // Uncomment one of the following two and the two fields in |
| 27 | // Object.java (libcore) to enable baker, brooks (unimplemented), or |
| 28 | // table-lookup read barriers. |
| 29 | |
| 30 | #ifdef ART_USE_READ_BARRIER |
| 31 | #if ART_READ_BARRIER_TYPE_IS_BAKER |
| 32 | #define USE_BAKER_READ_BARRIER |
| 33 | #elif ART_READ_BARRIER_TYPE_IS_BROOKS |
| 34 | #define USE_BROOKS_READ_BARRIER |
| 35 | #elif ART_READ_BARRIER_TYPE_IS_TABLELOOKUP |
| 36 | #define USE_TABLE_LOOKUP_READ_BARRIER |
| 37 | #else |
| 38 | #error "ART read barrier type must be set" |
| 39 | #endif |
| 40 | #endif // ART_USE_READ_BARRIER |
| 41 | |
| 42 | #if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER) |
| 43 | #define USE_BAKER_OR_BROOKS_READ_BARRIER |
| 44 | #endif |
| 45 | |
| 46 | #if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER) || defined(USE_TABLE_LOOKUP_READ_BARRIER) |
| 47 | #define USE_READ_BARRIER |
| 48 | #endif |
| 49 | |
| 50 | #if defined(USE_BAKER_READ_BARRIER) && defined(USE_BROOKS_READ_BARRIER) |
| 51 | #error "Only one of Baker or Brooks can be enabled at a time." |
| 52 | #endif |
| 53 | |
| 54 | |
| 55 | // C++-specific configuration part.. |
| 56 | |
| 57 | #ifdef __cplusplus |
| 58 | |
| 59 | namespace art { |
| 60 | |
| 61 | #ifdef USE_BAKER_READ_BARRIER |
| 62 | static constexpr bool kUseBakerReadBarrier = true; |
| 63 | #else |
| 64 | static constexpr bool kUseBakerReadBarrier = false; |
| 65 | #endif |
| 66 | |
| 67 | #ifdef USE_BROOKS_READ_BARRIER |
| 68 | static constexpr bool kUseBrooksReadBarrier = true; |
| 69 | #else |
| 70 | static constexpr bool kUseBrooksReadBarrier = false; |
| 71 | #endif |
| 72 | |
| 73 | #ifdef USE_TABLE_LOOKUP_READ_BARRIER |
| 74 | static constexpr bool kUseTableLookupReadBarrier = true; |
| 75 | #else |
| 76 | static constexpr bool kUseTableLookupReadBarrier = false; |
| 77 | #endif |
| 78 | |
| 79 | static constexpr bool kUseBakerOrBrooksReadBarrier = kUseBakerReadBarrier || kUseBrooksReadBarrier; |
| 80 | static constexpr bool kUseReadBarrier = |
| 81 | kUseBakerReadBarrier || kUseBrooksReadBarrier || kUseTableLookupReadBarrier; |
| 82 | |
| 83 | // Debugging flag that forces the generation of read barriers, but |
| 84 | // does not trigger the use of the concurrent copying GC. |
| 85 | // |
| 86 | // TODO: Remove this flag when the read barriers compiler |
| 87 | // instrumentation is completed. |
| 88 | static constexpr bool kForceReadBarrier = false; |
| 89 | // TODO: Likewise, remove this flag when kForceReadBarrier is removed |
| 90 | // and replace it with kUseReadBarrier. |
| 91 | static constexpr bool kEmitCompilerReadBarrier = kForceReadBarrier || kUseReadBarrier; |
| 92 | |
| 93 | } // namespace art |
| 94 | |
| 95 | #endif // __cplusplus |
| 96 | |
| 97 | #endif // ART_RUNTIME_READ_BARRIER_CONFIG_H_ |