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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| // compiled from: https://github.com/toyobayashi/emnapi/blob/main/packages/wasi-threads/src/proxy.ts | ||
| // MIT License | ||
| // | ||
| // Copyright (c) 2021-present Toyobayashi | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
| export const kIsProxy = Symbol('kIsProxy') | ||
|
|
||
| export const createInstanceProxy = ( | ||
| instance: WebAssembly.Instance, | ||
| memory?: WebAssembly.Memory | (() => WebAssembly.Memory) | ||
| ): WebAssembly.Instance => { | ||
| if ((instance as any)[kIsProxy]) return instance | ||
|
|
||
| // https://github.com/nodejs/help/issues/4102 | ||
| const originalExports = instance.exports | ||
| const createHandler = function (target: WebAssembly.Exports): ProxyHandler<WebAssembly.Exports> { | ||
| const handlers = [ | ||
| 'apply', | ||
| 'construct', | ||
| 'defineProperty', | ||
| 'deleteProperty', | ||
| 'get', | ||
| 'getOwnPropertyDescriptor', | ||
| 'getPrototypeOf', | ||
| 'has', | ||
| 'isExtensible', | ||
| 'ownKeys', | ||
| 'preventExtensions', | ||
| 'set', | ||
| 'setPrototypeOf' | ||
| ] | ||
| const handler: ProxyHandler<WebAssembly.Exports> = {} | ||
| for (let i = 0; i < handlers.length; i++) { | ||
| const name = handlers[i] as keyof ProxyHandler<WebAssembly.Exports> | ||
| handler[name] = function () { | ||
| const args = Array.prototype.slice.call(arguments, 1) | ||
| args.unshift(target) | ||
| return (Reflect[name] as any).apply(Reflect, args) | ||
| } | ||
| } | ||
| return handler | ||
| } | ||
| const handler = createHandler(originalExports) | ||
| const _initialize = (): void => {} | ||
| const _start = (): number => 0 | ||
| handler.get = function (_target, p, receiver) { | ||
| if (p === 'memory') { | ||
| return (typeof memory === 'function' ? memory() : memory) ?? Reflect.get(originalExports, p, receiver) | ||
| } | ||
| if (p === '_initialize') { | ||
| return p in originalExports ? _initialize : undefined | ||
| } | ||
| if (p === '_start') { | ||
| return p in originalExports ? _start : undefined | ||
| } | ||
| return Reflect.get(originalExports, p, receiver) | ||
| } | ||
| handler.has = function (_target, p) { | ||
| if (p === 'memory') return true | ||
| return Reflect.has(originalExports, p) | ||
| } | ||
| const exportsProxy = new Proxy(Object.create(null), handler) | ||
| return new Proxy(instance, { | ||
| get (target, p, receiver) { | ||
| if (p === 'exports') { | ||
| return exportsProxy | ||
| } | ||
| if (p === kIsProxy) { | ||
| return true | ||
| } | ||
| return Reflect.get(target, p, receiver) | ||
| } | ||
| }) | ||
| } |