// 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_SOURCE_POSITION_TABLE_H_ #define V8_SOURCE_POSITION_TABLE_H_ #include "src/assert-scope.h" #include "src/checks.h" #include "src/handles.h" #include "src/zone-containers.h" namespace v8 { namespace internal { class AbstractCode; class BytecodeArray; class ByteArray; class Isolate; class Zone; struct PositionTableEntry { PositionTableEntry() : code_offset(0), source_position(0), is_statement(false) {} PositionTableEntry(int offset, int source, bool statement) : code_offset(offset), source_position(source), is_statement(statement) {} int code_offset; int source_position; bool is_statement; }; class SourcePositionTableBuilder { public: enum RecordingMode { OMIT_SOURCE_POSITIONS, RECORD_SOURCE_POSITIONS }; SourcePositionTableBuilder(Isolate* isolate, Zone* zone, RecordingMode mode = RECORD_SOURCE_POSITIONS); void EndJitLogging(AbstractCode* code); void AddPosition(size_t code_offset, int source_position, bool is_statement); Handle<ByteArray> ToSourcePositionTable(); private: void AddEntry(const PositionTableEntry& entry); inline bool Omit() const { return mode_ == OMIT_SOURCE_POSITIONS; } Isolate* isolate_; RecordingMode mode_; ZoneVector<byte> bytes_; #ifdef ENABLE_SLOW_DCHECKS ZoneVector<PositionTableEntry> raw_entries_; #endif PositionTableEntry previous_; // Previously written entry, to compute delta. // Currently jit_handler_data_ is used to store JITHandler-specific data // over the lifetime of a SourcePositionTableBuilder. void* jit_handler_data_; }; class SourcePositionTableIterator { public: explicit SourcePositionTableIterator(ByteArray* byte_array); void Advance(); int code_offset() const { DCHECK(!done()); return current_.code_offset; } int source_position() const { DCHECK(!done()); return current_.source_position; } bool is_statement() const { DCHECK(!done()); return current_.is_statement; } bool done() const { return index_ == kDone; } private: static const int kDone = -1; ByteArray* table_; int index_; PositionTableEntry current_; DisallowHeapAllocation no_gc; }; } // namespace internal } // namespace v8 #endif // V8_SOURCE_POSITION_TABLE_H_