664 lines
18 KiB
TypeScript
664 lines
18 KiB
TypeScript
const encoder = new TextEncoder();
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const decoder = new TextDecoder();
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|
|
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type ImportObject = {
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wasi_snapshot_preview1: {
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proc_exit: (code) => void;
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random_get: (bufPtr, bufLen) => number;
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|
fd_seek: () => number;
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|
fd_write: (fd, iovs_ptr, iovs_len, nwritten_ptr) => number;
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fd_close: () => number;
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fd_fdstat_get: () => number;
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};
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env: {
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"syscall/js.valueInvoke": (
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ret_addr,
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v_addr,
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args_ptr,
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args_len,
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args_cap,
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) => void;
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"syscall/js.valueDelete": (v_addr, p_ptr, p_len) => void;
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"syscall/js.copyBytesToGo": (
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ret_addr,
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dest_addr,
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dest_len,
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dest_cap,
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source_addr,
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) => void;
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"syscall/js.valueSet": (v_addr, p_ptr, p_len, x_addr) => void;
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"syscall/js.copyBytesToJS": (
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ret_addr,
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dest_addr,
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source_addr,
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source_len,
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source_cap,
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) => void;
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|
"syscall/js.valueNew": (
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ret_addr,
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v_addr,
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args_ptr,
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args_len,
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args_cap,
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) => void;
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"syscall/js.valueInstanceOf": (v_addr, t_addr) => boolean;
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"runtime.ticks": () => number;
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"runtime.sleepTicks": (timeout) => void;
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"syscall/js.valueLoadString": (
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v_addr,
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slice_ptr,
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slice_len,
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slice_cap,
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) => void;
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"syscall/js.stringVal": (ret_ptr, value_ptr, value_len) => void;
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"syscall/js.valueIndex": (ret_addr, v_addr, i) => void;
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"syscall/js.valueLength": (v_addr) => any;
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"syscall/js.valueCall": (
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ret_addr,
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v_addr,
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m_ptr,
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m_len,
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args_ptr,
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args_len,
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args_cap,
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) => void;
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"syscall/js.finalizeRef": (sp) => void;
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"syscall/js.valueGet": (retval, v_addr, p_ptr, p_len) => void;
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"syscall/js.valuePrepareString": (ret_addr, v_addr) => void;
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"syscall/js.valueSetIndex": (v_addr, i, x_addr) => void;
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};
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};
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let logLine: any = [];
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export default class Go {
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private _callbackTimeouts: Map<any, any>;
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private _nextCallbackTimeoutID: number;
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private _inst?: any;
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private _values: any[] = [NaN, 0, null, true, false, global, this];
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private _ids: Map<any, any> = new Map<any, any>();
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private _idPool: any[] = [];
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private _goRefCounts: any[] = [];
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private exited = false;
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private _resolveCallbackPromise?: () => void;
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importObject: ImportObject;
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private _pendingEvent?: any;
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constructor() {
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this._callbackTimeouts = new Map();
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this._nextCallbackTimeoutID = 1;
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const mem = () => {
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// The buffer may change when requesting more memory.
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return new DataView(this._inst.exports.memory.buffer);
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};
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const setInt64 = (addr, v) => {
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mem().setUint32(addr + 0, v, true);
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mem().setUint32(addr + 4, Math.floor(v / 4294967296), true);
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};
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const getInt64 = (addr) => {
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const low = mem().getUint32(addr + 0, true);
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const high = mem().getInt32(addr + 4, true);
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return low + high * 4294967296;
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};
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const loadValue = (addr) => {
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const f = mem().getFloat64(addr, true);
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if (f === 0) {
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return undefined;
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}
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if (!isNaN(f)) {
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return f;
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}
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const id = mem().getUint32(addr, true);
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return this._values[id];
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};
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const storeValue = (addr, v) => {
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const nanHead = 0x7ff80000;
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if (typeof v === "number") {
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if (isNaN(v)) {
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 0, true);
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return;
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}
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if (v === 0) {
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 1, true);
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return;
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}
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mem().setFloat64(addr, v, true);
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return;
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}
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switch (v) {
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case undefined:
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mem().setFloat64(addr, 0, true);
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return;
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case null:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 2, true);
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return;
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case true:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 3, true);
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return;
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case false:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 4, true);
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return;
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}
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let id = this._ids.get(v);
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if (id === undefined) {
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id = this._idPool.pop();
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if (id === undefined) {
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id = this._values.length;
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}
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this._values[id] = v;
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this._goRefCounts[id] = 0;
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this._ids.set(v, id);
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}
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this._goRefCounts[id]++;
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let typeFlag = 1;
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switch (typeof v) {
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case "string":
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typeFlag = 2;
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break;
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case "symbol":
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typeFlag = 3;
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break;
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case "function":
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typeFlag = 4;
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break;
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}
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mem().setUint32(addr + 4, nanHead | typeFlag, true);
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mem().setUint32(addr, id, true);
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};
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const loadSlice = (array, len, cap?) => {
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return new Uint8Array(this._inst.exports.memory.buffer, array, len);
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};
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const loadSliceOfValues = (array, len, cap) => {
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const a = new Array(len);
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for (let i = 0; i < len; i++) {
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a[i] = loadValue(array + i * 8);
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}
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return a;
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};
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const loadString = (ptr, len) => {
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return decoder.decode(
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new DataView(this._inst.exports.memory.buffer, ptr, len),
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);
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};
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const timeOrigin = Date.now() - performance.now();
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this.importObject = {
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wasi_snapshot_preview1: {
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fd_write: (fd, iovs_ptr, iovs_len, nwritten_ptr) => {
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|
let nwritten = 0;
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|
if (fd == 1) {
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for (let iovs_i = 0; iovs_i < iovs_len; iovs_i++) {
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let iov_ptr = iovs_ptr + iovs_i * 8;
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let ptr = mem().getUint32(iov_ptr + 0, true);
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let len = mem().getUint32(iov_ptr + 4, true);
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nwritten += len;
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for (let i = 0; i < len; i++) {
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|
let c = mem().getUint8(ptr + i);
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|
if (c == 13) {
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|
// CR
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|
// ignore
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|
} else if (c == 10) {
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|
// LF
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|
// write line
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|
let line = decoder.decode(new Uint8Array(logLine));
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logLine = [];
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console.log(line);
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|
} else {
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|
logLine.push(c);
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}
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|
}
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|
}
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} else {
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|
console.error("Invalid file descriptor:", fd);
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}
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mem().setUint32(nwritten_ptr, nwritten, true);
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return 0;
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},
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fd_close: () => 0, // dummy
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|
fd_fdstat_get: () => 0, // dummy
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fd_seek: () => 0, // dummy
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proc_exit: (code) => {
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if (global.process) {
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// Node.js
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process.exit(code);
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|
} else {
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|
// Can't exit in a browser.
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throw "Trying to exit with code " + code;
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}
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},
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random_get: (bufPtr, bufLen) => {
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crypto.getRandomValues(loadSlice(bufPtr, bufLen));
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return 0;
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},
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},
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env: {
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"runtime.ticks": () => {
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return timeOrigin + performance.now();
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},
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"runtime.sleepTicks": (timeout) => {
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setTimeout(this._inst.exports.go_scheduler, timeout);
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},
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"syscall/js.finalizeRef": (sp) => {
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console.error("syscall/js.finalizeRef not implemented");
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},
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"syscall/js.stringVal": (ret_ptr, value_ptr, value_len) => {
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const s = loadString(value_ptr, value_len);
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storeValue(ret_ptr, s);
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},
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"syscall/js.valueGet": (retval, v_addr, p_ptr, p_len) => {
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let prop = loadString(p_ptr, p_len);
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let value = loadValue(v_addr);
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let result = Reflect.get(value, prop);
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storeValue(retval, result);
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},
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"syscall/js.valueSet": (v_addr, p_ptr, p_len, x_addr) => {
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const v = loadValue(v_addr);
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const p = loadString(p_ptr, p_len);
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const x = loadValue(x_addr);
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Reflect.set(v, p, x);
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},
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"syscall/js.valueDelete": (v_addr, p_ptr, p_len) => {
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const v = loadValue(v_addr);
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const p = loadString(p_ptr, p_len);
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Reflect.deleteProperty(v, p);
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},
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|
"syscall/js.valueIndex": (ret_addr, v_addr, i) => {
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storeValue(ret_addr, Reflect.get(loadValue(v_addr), i));
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},
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"syscall/js.valueSetIndex": (v_addr, i, x_addr) => {
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Reflect.set(loadValue(v_addr), i, loadValue(x_addr));
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},
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"syscall/js.valueCall": (
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ret_addr,
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|
v_addr,
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|
m_ptr,
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|
m_len,
|
|
args_ptr,
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|
args_len,
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|
args_cap,
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) => {
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const v = loadValue(v_addr);
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const name = loadString(m_ptr, m_len);
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const args = loadSliceOfValues(args_ptr, args_len, args_cap);
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try {
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const m = Reflect.get(v, name);
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storeValue(ret_addr, Reflect.apply(m, v, args));
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mem().setUint8(ret_addr + 8, 1);
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} catch (err) {
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storeValue(ret_addr, err);
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mem().setUint8(ret_addr + 8, 0);
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|
}
|
|
},
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|
"syscall/js.valueInvoke": (
|
|
ret_addr,
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|
v_addr,
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|
args_ptr,
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|
args_len,
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|
args_cap,
|
|
) => {
|
|
try {
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|
const v = loadValue(v_addr);
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|
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
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|
storeValue(ret_addr, Reflect.apply(v, undefined, args));
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|
mem().setUint8(ret_addr + 8, 1);
|
|
} catch (err) {
|
|
storeValue(ret_addr, err);
|
|
mem().setUint8(ret_addr + 8, 0);
|
|
}
|
|
},
|
|
"syscall/js.valueNew": (
|
|
ret_addr,
|
|
v_addr,
|
|
args_ptr,
|
|
args_len,
|
|
args_cap,
|
|
) => {
|
|
const v = loadValue(v_addr);
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|
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
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|
try {
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|
storeValue(ret_addr, Reflect.construct(v, args));
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|
mem().setUint8(ret_addr + 8, 1);
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|
} catch (err) {
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|
storeValue(ret_addr, err);
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|
mem().setUint8(ret_addr + 8, 0);
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|
}
|
|
},
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|
"syscall/js.valueLength": (v_addr) => {
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|
return loadValue(v_addr).length;
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|
},
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|
"syscall/js.valuePrepareString": (ret_addr, v_addr) => {
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|
const s = String(loadValue(v_addr));
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|
const str = encoder.encode(s);
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|
storeValue(ret_addr, str);
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|
setInt64(ret_addr + 8, str.length);
|
|
},
|
|
"syscall/js.valueLoadString": (
|
|
v_addr,
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|
slice_ptr,
|
|
slice_len,
|
|
slice_cap,
|
|
) => {
|
|
const str = loadValue(v_addr);
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|
loadSlice(slice_ptr, slice_len, slice_cap).set(str);
|
|
},
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|
"syscall/js.valueInstanceOf": (v_addr, t_addr) => {
|
|
return loadValue(v_addr) instanceof loadValue(t_addr);
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|
},
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|
"syscall/js.copyBytesToGo": (
|
|
ret_addr,
|
|
dest_addr,
|
|
dest_len,
|
|
dest_cap,
|
|
source_addr,
|
|
) => {
|
|
let num_bytes_copied_addr = ret_addr;
|
|
let returned_status_addr = ret_addr + 4;
|
|
|
|
const dst = loadSlice(dest_addr, dest_len, dest_cap);
|
|
const src = loadValue(source_addr);
|
|
if (
|
|
!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)
|
|
) {
|
|
mem().setUint8(returned_status_addr, 0);
|
|
return;
|
|
}
|
|
const toCopy = src.subarray(0, dst.length);
|
|
dst.set(toCopy);
|
|
setInt64(num_bytes_copied_addr, toCopy.length);
|
|
mem().setUint8(returned_status_addr, 1);
|
|
},
|
|
"syscall/js.copyBytesToJS": (
|
|
ret_addr,
|
|
dest_addr,
|
|
source_addr,
|
|
source_len,
|
|
source_cap,
|
|
) => {
|
|
let num_bytes_copied_addr = ret_addr;
|
|
let returned_status_addr = ret_addr + 4;
|
|
|
|
const dst = loadValue(dest_addr);
|
|
const src = loadSlice(source_addr, source_len, source_cap);
|
|
if (
|
|
!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)
|
|
) {
|
|
mem().setUint8(returned_status_addr, 0);
|
|
return;
|
|
}
|
|
const toCopy = src.subarray(0, dst.length);
|
|
dst.set(toCopy);
|
|
setInt64(num_bytes_copied_addr, toCopy.length);
|
|
mem().setUint8(returned_status_addr, 1);
|
|
},
|
|
},
|
|
};
|
|
}
|
|
|
|
async run(instance) {
|
|
this._inst = instance;
|
|
const mem = new DataView(this._inst.exports.memory.buffer);
|
|
|
|
while (true) {
|
|
const callbackPromise = new Promise((resolve) => {
|
|
this._resolveCallbackPromise = () => {
|
|
if (this.exited) {
|
|
throw new Error("Bad callback: Go program has already exited");
|
|
}
|
|
setTimeout(resolve, 0);
|
|
};
|
|
});
|
|
this._inst.exports._start();
|
|
if (this.exited) {
|
|
break;
|
|
}
|
|
await callbackPromise;
|
|
}
|
|
}
|
|
|
|
_resume() {
|
|
if (this.exited) {
|
|
throw new Error("Go program has already exited");
|
|
}
|
|
this._inst.exports.resume();
|
|
}
|
|
_makeFuncWrapper(id) {
|
|
const go = this;
|
|
return function () {
|
|
const event = { id: id, this: this, args: arguments };
|
|
go._pendingEvent = event;
|
|
go._resume();
|
|
// @ts-ignore
|
|
return event.result;
|
|
};
|
|
}
|
|
}
|
|
|
|
if (
|
|
typeof global !== "undefined" ||
|
|
typeof window !== "undefined" ||
|
|
typeof self !== "undefined"
|
|
) {
|
|
if (typeof global !== "undefined") {
|
|
// global already exists
|
|
} else if (typeof window !== "undefined") {
|
|
window.global = window;
|
|
} else if (typeof self !== "undefined") {
|
|
self.global = self;
|
|
} else {
|
|
throw new Error(
|
|
"Cannot export Go (neither global, window nor self is defined)",
|
|
);
|
|
}
|
|
|
|
if (!global.require && typeof require !== "undefined") {
|
|
global.require = require;
|
|
}
|
|
|
|
// @ts-ignore
|
|
if (!global.fs && global.require) {
|
|
global.fs = require("fs");
|
|
}
|
|
|
|
const enosys = () => {
|
|
const err = new Error("not implemented");
|
|
// @ts-ignore
|
|
err.code = "ENOSYS";
|
|
return err;
|
|
};
|
|
|
|
if (!global.fs) {
|
|
let outputBuf = "";
|
|
global.fs = {
|
|
constants: {
|
|
O_WRONLY: -1,
|
|
O_RDWR: -1,
|
|
O_CREAT: -1,
|
|
O_TRUNC: -1,
|
|
O_APPEND: -1,
|
|
O_EXCL: -1,
|
|
},
|
|
writeSync: (fd, buf) => {
|
|
outputBuf += decoder.decode(buf);
|
|
const nl = outputBuf.lastIndexOf("\n");
|
|
if (nl != -1) {
|
|
console.log(outputBuf.substr(0, nl));
|
|
outputBuf = outputBuf.substr(nl + 1);
|
|
}
|
|
return buf.length;
|
|
},
|
|
write: (fd, buf, offset, length, position, callback) => {
|
|
if (offset !== 0 || length !== buf.length || position !== null) {
|
|
callback(enosys());
|
|
return;
|
|
}
|
|
const n = global.fs.writeSync(fd, buf);
|
|
callback(null, n);
|
|
},
|
|
open: (path, flags, mode, callback) => {
|
|
callback(enosys());
|
|
},
|
|
fsync: (fd, callback) => {
|
|
callback(null);
|
|
},
|
|
fdatasync: (fd, callback) => {
|
|
callback(null);
|
|
},
|
|
close: (fd, callback) => {
|
|
callback(null);
|
|
},
|
|
createReadStream: enosys,
|
|
createWriteStream: enosys,
|
|
ftruncate: (fd, length, callback) => {
|
|
callback(enosys());
|
|
},
|
|
readFile: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
writeFile: (path, data, callback) => {
|
|
callback(enosys());
|
|
},
|
|
truncate: (path, length, callback) => {
|
|
callback(enosys());
|
|
},
|
|
readdir: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
unlink: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
rmdir: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
mkdir: (path, perm, callback) => {
|
|
callback(enosys());
|
|
},
|
|
stat: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
lstat: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
fstat: (fd, callback) => {
|
|
callback(enosys());
|
|
},
|
|
rename: (oldPath, newPath, callback) => {
|
|
callback(enosys());
|
|
},
|
|
symlink: (target, path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
link: (existingPath, newPath, callback) => {
|
|
callback(enosys());
|
|
},
|
|
readlink: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
chmod: (path, mode, callback) => {
|
|
callback(enosys());
|
|
},
|
|
lchmod: (path, mode, callback) => {
|
|
callback(enosys());
|
|
},
|
|
fchmod: (fd, mode, callback) => {
|
|
callback(enosys());
|
|
},
|
|
chown: (path, uid, gid, callback) => {
|
|
callback(enosys());
|
|
},
|
|
lchown: (path, uid, gid, callback) => {
|
|
callback(enosys());
|
|
},
|
|
fchown: (fd, uid, gid, callback) => {
|
|
callback(enosys());
|
|
},
|
|
utimes: (path, atime, mtime, callback) => {
|
|
callback(enosys());
|
|
},
|
|
futimes: (fd, atime, mtime, callback) => {
|
|
callback(enosys());
|
|
},
|
|
realpath: (path, callback) => {
|
|
callback(enosys());
|
|
},
|
|
fallocate: (fd, mode, offset, length, callback) => {
|
|
callback(enosys());
|
|
},
|
|
copyFile: (src, dest, flags, callback) => {
|
|
callback(enosys());
|
|
},
|
|
};
|
|
}
|
|
|
|
if (!global.crypto) {
|
|
global.crypto = {
|
|
// @ts-ignore
|
|
getRandomValues: (arr: number[]) => {
|
|
for (let i = 0; i < arr.length; i++) {
|
|
arr[i] = Math.floor(Math.random() * 256);
|
|
}
|
|
},
|
|
};
|
|
}
|
|
|
|
if (!global.performance) {
|
|
// @ts-ignore
|
|
global.performance = {
|
|
now: () => Date.now(),
|
|
};
|
|
}
|
|
|
|
if (!global.TextEncoder) {
|
|
global.TextEncoder = TextEncoder;
|
|
}
|
|
|
|
if (!global.TextDecoder) {
|
|
// @ts-ignore
|
|
global.TextDecoder = TextDecoder;
|
|
}
|
|
|
|
if (!global.Buffer) {
|
|
global.Buffer = {
|
|
// @ts-ignore
|
|
isBuffer: (x) => false,
|
|
};
|
|
}
|
|
|
|
if (!global.process) {
|
|
// @ts-ignore
|
|
global.process = {
|
|
getuid: () => -1,
|
|
getgid: () => -1,
|
|
geteuid: () => -1,
|
|
getegid: () => -1,
|
|
getgroups: () => [],
|
|
pid: -1,
|
|
ppid: -1,
|
|
umask: () => 0,
|
|
cwd: () => "/",
|
|
chdir: (dir) => {},
|
|
};
|
|
}
|
|
|
|
if (!global.Error) {
|
|
// @ts-ignore
|
|
global.Error = class extends Error {};
|
|
}
|
|
}
|