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// 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_
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