LiteLoaderBDS-1.16.40/Tools/ScriptX/backend/WebAssembly/WasmException.cc
2023-03-03 10:18:21 -08:00

99 lines
2.9 KiB
C++

/*
* Tencent is pleased to support the open source community by making ScriptX available.
* Copyright (C) 2021 THL A29 Limited, a Tencent company. All rights reserved.
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#include "../../src/Exception.h"
#include "WasmEngine.h"
#include "WasmReference.hpp"
namespace script {
void wasm_backend::ExceptionFields::fillMessage() const noexcept {
if (!hasMessage_) {
hasMessage_ = true;
try {
auto exp = exception_.get().asObject();
message_ = exp.get("message").asString().toString();
} catch (Exception&) {
message_ = "[another exception in message()]";
}
}
}
Exception::Exception(std::string message) : std::exception(), exception_() {
exception_.message_ = std::move(message);
exception_.hasMessage_ = true;
}
Exception::Exception(const script::Local<script::String>& message)
: std::exception(), exception_() {
exception_.exception_ =
wasm_backend::WasmEngine::make<Local<Value>>(wasm_backend::Stack::newError(message.val_));
#ifndef NDEBUG
// better debug experience
exception_.fillMessage();
#endif
}
Exception::Exception(const script::Local<script::Value>& exception)
: std::exception(), exception_({}) {
if (exception.isObject()) {
exception_.exception_ = exception;
} else {
exception_.exception_ = wasm_backend::WasmEngine::make<Local<Value>>(
wasm_backend::Stack::newError(exception.describe().val_));
}
#ifndef NDEBUG
// better debug experience
exception_.fillMessage();
#endif
}
Local<Value> Exception::exception() const {
if (exception_.exception_.isEmpty()) {
exception_.exception_ = wasm_backend::WasmEngine::make<Local<Value>>(
wasm_backend::Stack::newError(String::newString(exception_.message_).val_));
}
return exception_.exception_.getValue();
}
std::string Exception::message() const noexcept {
exception_.fillMessage();
return exception_.message_;
}
std::string Exception::stacktrace() const noexcept {
try {
auto exp = exception();
if (exp.isObject()) {
auto stack = exception().asObject().get("stack");
if (stack.isString()) {
return stack.asString().toString();
}
}
return exp.describeUtf8();
} catch (Exception&) {
}
return "[failed to obtain stacktrace]";
}
const char* Exception::what() const noexcept {
exception_.fillMessage();
return exception_.message_.c_str();
}
} // namespace script