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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*
* Copyright 2021 Mozilla Foundation
*
* 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
*
*
* 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 wasm_exception_h
#define wasm_exception_h
namespace js {
namespace wasm {
static const uint32_t CatchAllIndex = UINT32_MAX;
static_assert(CatchAllIndex > MaxTags);
struct TryTableCatch {
TryTableCatch()
: tagIndex(CatchAllIndex), labelRelativeDepth(0), captureExnRef(false) {}
// The tag index for this catch, or CatchAllIndex for a catch_all.
uint32_t tagIndex;
// The relative depth of where to branch to when catching an exception.
uint32_t labelRelativeDepth;
// Whether the exnref that is caught should be captured and passed to the
// branch target.
bool captureExnRef;
// The params that the target branch at `labelRelativeDepth` expects. This
// includes any exnref that should or should not be captured.
ValTypeVector labelType;
};
using TryTableCatchVector = Vector<TryTableCatch, 1, SystemAllocPolicy>;
} // namespace wasm
} // namespace js
#endif // wasm_exception_h