| /* |
| * Copyright (C) 2015 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_COMPILER_DEX_QUICK_LAZY_DEBUG_FRAME_OPCODE_WRITER_H_ |
| #define ART_COMPILER_DEX_QUICK_LAZY_DEBUG_FRAME_OPCODE_WRITER_H_ |
| |
| #include "base/arena_allocator.h" |
| #include "base/arena_containers.h" |
| #include "dwarf/debug_frame_opcode_writer.h" |
| |
| namespace art { |
| struct LIR; |
| namespace dwarf { |
| |
| // When we are generating the CFI code, we do not know the instuction offsets, |
| // this class stores the LIR references and patches the instruction stream later. |
| class LazyDebugFrameOpCodeWriter FINAL |
| : public DebugFrameOpCodeWriter<ArenaAllocatorAdapter<uint8_t>> { |
| typedef DebugFrameOpCodeWriter<ArenaAllocatorAdapter<uint8_t>> Base; |
| public: |
| // This method is implicitely called the by opcode writers. |
| virtual void ImplicitlyAdvancePC() OVERRIDE { |
| DCHECK_EQ(patched_, false); |
| DCHECK_EQ(this->current_pc_, 0); |
| advances_.push_back({this->data()->size(), *last_lir_insn_}); |
| } |
| |
| const ArenaVector<uint8_t>* Patch(size_t code_size); |
| |
| explicit LazyDebugFrameOpCodeWriter(LIR** last_lir_insn, bool enable_writes, |
| ArenaAllocator* allocator) |
| : Base(enable_writes, allocator->Adapter()), |
| last_lir_insn_(last_lir_insn), |
| advances_(allocator->Adapter()), |
| patched_(false) { |
| } |
| |
| private: |
| typedef struct { |
| size_t pos; |
| LIR* last_lir_insn; |
| } Advance; |
| |
| using Base::data; // Hidden. Use Patch method instead. |
| |
| LIR** last_lir_insn_; |
| ArenaVector<Advance> advances_; |
| bool patched_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LazyDebugFrameOpCodeWriter); |
| }; |
| |
| } // namespace dwarf |
| } // namespace art |
| |
| #endif // ART_COMPILER_DEX_QUICK_LAZY_DEBUG_FRAME_OPCODE_WRITER_H_ |