| // Copyright 2016 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_INTERPRETER_SOURCE_POSITION_TABLE_H_ |
| #define V8_INTERPRETER_SOURCE_POSITION_TABLE_H_ |
| |
| #include "src/assert-scope.h" |
| #include "src/handles.h" |
| #include "src/zone.h" |
| #include "src/zone-containers.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class BytecodeArray; |
| class FixedArray; |
| class Isolate; |
| |
| namespace interpreter { |
| |
| class SourcePositionTableBuilder { |
| public: |
| explicit SourcePositionTableBuilder(Isolate* isolate, Zone* zone) |
| : isolate_(isolate), entries_(zone) {} |
| |
| void AddStatementPosition(size_t bytecode_offset, int source_position); |
| void AddExpressionPosition(size_t bytecode_offset, int source_position); |
| void RevertPosition(size_t bytecode_offset); |
| Handle<FixedArray> ToFixedArray(); |
| |
| private: |
| struct Entry { |
| int bytecode_offset; |
| uint32_t source_position_and_type; |
| }; |
| |
| bool CodeOffsetHasPosition(int bytecode_offset) { |
| // Return whether bytecode offset already has a position assigned. |
| return entries_.size() > 0 && |
| entries_.back().bytecode_offset == bytecode_offset; |
| } |
| |
| Isolate* isolate_; |
| ZoneVector<Entry> entries_; |
| }; |
| |
| class SourcePositionTableIterator { |
| public: |
| explicit SourcePositionTableIterator(BytecodeArray* bytecode_array); |
| |
| void Advance(); |
| |
| int bytecode_offset() const { |
| DCHECK(!done()); |
| return bytecode_offset_; |
| } |
| int source_position() const { |
| DCHECK(!done()); |
| return source_position_; |
| } |
| bool is_statement() const { |
| DCHECK(!done()); |
| return is_statement_; |
| } |
| bool done() const { return index_ > length_; } |
| |
| private: |
| FixedArray* table_; |
| int index_; |
| int length_; |
| bool is_statement_; |
| int bytecode_offset_; |
| int source_position_; |
| DisallowHeapAllocation no_gc; |
| }; |
| |
| } // namespace interpreter |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_INTERPRETER_SOURCE_POSITION_TABLE_H_ |