chromium/v8/src/codegen/handler-table.h

// Copyright 2018 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_CODEGEN_HANDLER_TABLE_H_
#define V8_CODEGEN_HANDLER_TABLE_H_

#include "src/base/bit-field.h"
#include "src/common/assert-scope.h"
#include "src/common/globals.h"

namespace v8 {
namespace internal {

class Assembler;
class TrustedByteArray;
class BytecodeArray;
class InstructionStream;
class Code;

namespace wasm {
class WasmCode;
}  // namespace wasm

// HandlerTable is a byte array containing entries for exception handlers in
// the code object it is associated with. The tables come in two flavors:
// 1) Based on ranges: Used for unoptimized code. Stored in a
//   {TrustedByteArray} that is attached to each {BytecodeArray}. Contains one
//   entry per exception handler and a range representing the try-block covered
//   by that handler. Layout looks as follows:
//      [ range-start , range-end , handler-offset , handler-data ]
// 2) Based on return addresses: Used for turbofanned code. Stored directly in
//    the instruction stream of the {InstructionStream} object. Contains one
//    entry per call-site that could throw an exception. Layout looks as
//    follows:
//      [ return-address-offset , handler-offset ]
class V8_EXPORT_PRIVATE HandlerTable { … };

}  // namespace internal
}  // namespace v8

#endif  // V8_CODEGEN_HANDLER_TABLE_H_