diff --git a/wasm/wasm_exec.cjs b/wasm/wasm_exec.cjs index 7e6c64e4e..739e5e901 100644 --- a/wasm/wasm_exec.cjs +++ b/wasm/wasm_exec.cjs @@ -2,226 +2,305 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -"use strict"; - -(() => { +'use strict' +;(() => { const enosys = () => { - const err = new Error("not implemented"); - err.code = "ENOSYS"; - return err; - }; + const err = new Error('not implemented') + err.code = 'ENOSYS' + return err + } if (!globalThis.fs) { - let outputBuf = ""; + let outputBuf = '' globalThis.fs = { - constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1, O_DIRECTORY: -1 }, // unused + constants: { + O_WRONLY: -1, + O_RDWR: -1, + O_CREAT: -1, + O_TRUNC: -1, + O_APPEND: -1, + O_EXCL: -1, + O_DIRECTORY: -1, + }, // unused writeSync(fd, buf) { - outputBuf += decoder.decode(buf); - const nl = outputBuf.lastIndexOf("\n"); + outputBuf += decoder.decode(buf) + const nl = outputBuf.lastIndexOf('\n') if (nl != -1) { - console.log(outputBuf.substring(0, nl)); - outputBuf = outputBuf.substring(nl + 1); + console.log(outputBuf.substring(0, nl)) + outputBuf = outputBuf.substring(nl + 1) } - return buf.length; + return buf.length }, write(fd, buf, offset, length, position, callback) { if (offset !== 0 || length !== buf.length || position !== null) { - callback(enosys()); - return; + callback(enosys()) + return } - const n = this.writeSync(fd, buf); - callback(null, n); - }, - chmod(path, mode, callback) { callback(enosys()); }, - chown(path, uid, gid, callback) { callback(enosys()); }, - close(fd, callback) { callback(enosys()); }, - fchmod(fd, mode, callback) { callback(enosys()); }, - fchown(fd, uid, gid, callback) { callback(enosys()); }, - fstat(fd, callback) { callback(enosys()); }, - fsync(fd, callback) { callback(null); }, - ftruncate(fd, length, callback) { callback(enosys()); }, - lchown(path, uid, gid, callback) { callback(enosys()); }, - link(path, link, callback) { callback(enosys()); }, - lstat(path, callback) { callback(enosys()); }, - mkdir(path, perm, callback) { callback(enosys()); }, - open(path, flags, mode, callback) { callback(enosys()); }, - read(fd, buffer, offset, length, position, callback) { callback(enosys()); }, - readdir(path, callback) { callback(enosys()); }, - readlink(path, callback) { callback(enosys()); }, - rename(from, to, callback) { callback(enosys()); }, - rmdir(path, callback) { callback(enosys()); }, - stat(path, callback) { callback(enosys()); }, - symlink(path, link, callback) { callback(enosys()); }, - truncate(path, length, callback) { callback(enosys()); }, - unlink(path, callback) { callback(enosys()); }, - utimes(path, atime, mtime, callback) { callback(enosys()); }, - }; + const n = this.writeSync(fd, buf) + callback(null, n) + }, + chmod(path, mode, callback) { + callback(enosys()) + }, + chown(path, uid, gid, callback) { + callback(enosys()) + }, + close(fd, callback) { + callback(enosys()) + }, + fchmod(fd, mode, callback) { + callback(enosys()) + }, + fchown(fd, uid, gid, callback) { + callback(enosys()) + }, + fstat(fd, callback) { + callback(enosys()) + }, + fsync(fd, callback) { + callback(null) + }, + ftruncate(fd, length, callback) { + callback(enosys()) + }, + lchown(path, uid, gid, callback) { + callback(enosys()) + }, + link(path, link, callback) { + callback(enosys()) + }, + lstat(path, callback) { + callback(enosys()) + }, + mkdir(path, perm, callback) { + callback(enosys()) + }, + open(path, flags, mode, callback) { + callback(enosys()) + }, + read(fd, buffer, offset, length, position, callback) { + callback(enosys()) + }, + readdir(path, callback) { + callback(enosys()) + }, + readlink(path, callback) { + callback(enosys()) + }, + rename(from, to, callback) { + callback(enosys()) + }, + rmdir(path, callback) { + callback(enosys()) + }, + stat(path, callback) { + callback(enosys()) + }, + symlink(path, link, callback) { + callback(enosys()) + }, + truncate(path, length, callback) { + callback(enosys()) + }, + unlink(path, callback) { + callback(enosys()) + }, + utimes(path, atime, mtime, callback) { + callback(enosys()) + }, + } } if (!globalThis.process) { globalThis.process = { - getuid() { return -1; }, - getgid() { return -1; }, - geteuid() { return -1; }, - getegid() { return -1; }, - getgroups() { throw enosys(); }, + getuid() { + return -1 + }, + getgid() { + return -1 + }, + geteuid() { + return -1 + }, + getegid() { + return -1 + }, + getgroups() { + throw enosys() + }, pid: -1, ppid: -1, - umask() { throw enosys(); }, - cwd() { throw enosys(); }, - chdir() { throw enosys(); }, + umask() { + throw enosys() + }, + cwd() { + throw enosys() + }, + chdir() { + throw enosys() + }, } } if (!globalThis.path) { globalThis.path = { resolve(...pathSegments) { - return pathSegments.join("/"); - } + return pathSegments.join('/') + }, } } if (!globalThis.crypto) { - throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)"); + throw new Error( + 'globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)', + ) } if (!globalThis.performance) { - throw new Error("globalThis.performance is not available, polyfill required (performance.now only)"); + throw new Error( + 'globalThis.performance is not available, polyfill required (performance.now only)', + ) } if (!globalThis.TextEncoder) { - throw new Error("globalThis.TextEncoder is not available, polyfill required"); + throw new Error( + 'globalThis.TextEncoder is not available, polyfill required', + ) } if (!globalThis.TextDecoder) { - throw new Error("globalThis.TextDecoder is not available, polyfill required"); + throw new Error( + 'globalThis.TextDecoder is not available, polyfill required', + ) } - const encoder = new TextEncoder("utf-8"); - const decoder = new TextDecoder("utf-8"); + const encoder = new TextEncoder('utf-8') + const decoder = new TextDecoder('utf-8') globalThis.Go = class { constructor() { - this.argv = ["js"]; - this.env = {}; - this.exit = (code) => { + this.argv = ['js'] + this.env = {} + this.exit = code => { if (code !== 0) { - console.warn("exit code:", code); + console.warn('exit code:', code) } - }; - this._exitPromise = new Promise((resolve) => { - this._resolveExitPromise = resolve; - }); - this._pendingEvent = null; - this._scheduledTimeouts = new Map(); - this._nextCallbackTimeoutID = 1; + } + this._exitPromise = new Promise(resolve => { + this._resolveExitPromise = resolve + }) + this._pendingEvent = null + this._scheduledTimeouts = new Map() + this._nextCallbackTimeoutID = 1 const setInt64 = (addr, v) => { - this.mem.setUint32(addr + 0, v, true); - this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true); + this.mem.setUint32(addr + 0, v, true) + this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true) } const setInt32 = (addr, v) => { - this.mem.setUint32(addr + 0, v, true); + this.mem.setUint32(addr + 0, v, true) } - const getInt64 = (addr) => { - const low = this.mem.getUint32(addr + 0, true); - const high = this.mem.getInt32(addr + 4, true); - return low + high * 4294967296; + const getInt64 = addr => { + const low = this.mem.getUint32(addr + 0, true) + const high = this.mem.getInt32(addr + 4, true) + return low + high * 4294967296 } - const loadValue = (addr) => { - const f = this.mem.getFloat64(addr, true); + const loadValue = addr => { + const f = this.mem.getFloat64(addr, true) if (f === 0) { - return undefined; + return undefined } if (!isNaN(f)) { - return f; + return f } - const id = this.mem.getUint32(addr, true); - return this._values[id]; + const id = this.mem.getUint32(addr, true) + return this._values[id] } const storeValue = (addr, v) => { - const nanHead = 0x7FF80000; + const nanHead = 0x7ff80000 - if (typeof v === "number" && v !== 0) { + if (typeof v === 'number' && v !== 0) { if (isNaN(v)) { - this.mem.setUint32(addr + 4, nanHead, true); - this.mem.setUint32(addr, 0, true); - return; + this.mem.setUint32(addr + 4, nanHead, true) + this.mem.setUint32(addr, 0, true) + return } - this.mem.setFloat64(addr, v, true); - return; + this.mem.setFloat64(addr, v, true) + return } if (v === undefined) { - this.mem.setFloat64(addr, 0, true); - return; + this.mem.setFloat64(addr, 0, true) + return } - let id = this._ids.get(v); + let id = this._ids.get(v) if (id === undefined) { - id = this._idPool.pop(); + id = this._idPool.pop() if (id === undefined) { - id = this._values.length; + id = this._values.length } - this._values[id] = v; - this._goRefCounts[id] = 0; - this._ids.set(v, id); + this._values[id] = v + this._goRefCounts[id] = 0 + this._ids.set(v, id) } - this._goRefCounts[id]++; - let typeFlag = 0; + this._goRefCounts[id]++ + let typeFlag = 0 switch (typeof v) { - case "object": + case 'object': if (v !== null) { - typeFlag = 1; + typeFlag = 1 } - break; - case "string": - typeFlag = 2; - break; - case "symbol": - typeFlag = 3; - break; - case "function": - typeFlag = 4; - break; + break + case 'string': + typeFlag = 2 + break + case 'symbol': + typeFlag = 3 + break + case 'function': + typeFlag = 4 + break } - this.mem.setUint32(addr + 4, nanHead | typeFlag, true); - this.mem.setUint32(addr, id, true); + this.mem.setUint32(addr + 4, nanHead | typeFlag, true) + this.mem.setUint32(addr, id, true) } - const loadSlice = (addr) => { - const array = getInt64(addr + 0); - const len = getInt64(addr + 8); - return new Uint8Array(this._inst.exports.mem.buffer, array, len); + const loadSlice = addr => { + const array = getInt64(addr + 0) + const len = getInt64(addr + 8) + return new Uint8Array(this._inst.exports.mem.buffer, array, len) } - const loadSliceOfValues = (addr) => { - const array = getInt64(addr + 0); - const len = getInt64(addr + 8); - const a = new Array(len); + const loadSliceOfValues = addr => { + const array = getInt64(addr + 0) + const len = getInt64(addr + 8) + const a = new Array(len) for (let i = 0; i < len; i++) { - a[i] = loadValue(array + i * 8); + a[i] = loadValue(array + i * 8) } - return a; + return a } - const loadString = (addr) => { - const saddr = getInt64(addr + 0); - const len = getInt64(addr + 8); - return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len)); + const loadString = addr => { + const saddr = getInt64(addr + 0) + const len = getInt64(addr + 8) + return decoder.decode( + new DataView(this._inst.exports.mem.buffer, saddr, len), + ) } const testCallExport = (a, b) => { - this._inst.exports.testExport0(); - return this._inst.exports.testExport(a, b); + this._inst.exports.testExport0() + return this._inst.exports.testExport(a, b) } - const timeOrigin = Date.now() - performance.now(); + const timeOrigin = Date.now() - performance.now() this.importObject = { _gotest: { add: (a, b) => a + b, @@ -234,255 +313,280 @@ // This changes the SP, thus we have to update the SP used by the imported function. // func wasmExit(code int32) - "runtime.wasmExit": (sp) => { - sp >>>= 0; - const code = this.mem.getInt32(sp + 8, true); - this.exited = true; - delete this._inst; - delete this._values; - delete this._goRefCounts; - delete this._ids; - delete this._idPool; - this.exit(code); + 'runtime.wasmExit': sp => { + sp >>>= 0 + const code = this.mem.getInt32(sp + 8, true) + this.exited = true + delete this._inst + delete this._values + delete this._goRefCounts + delete this._ids + delete this._idPool + this.exit(code) }, // func wasmWrite(fd uintptr, p unsafe.Pointer, n int32) - "runtime.wasmWrite": (sp) => { - sp >>>= 0; - const fd = getInt64(sp + 8); - const p = getInt64(sp + 16); - const n = this.mem.getInt32(sp + 24, true); - fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n)); + 'runtime.wasmWrite': sp => { + sp >>>= 0 + const fd = getInt64(sp + 8) + const p = getInt64(sp + 16) + const n = this.mem.getInt32(sp + 24, true) + fs.writeSync( + fd, + new Uint8Array(this._inst.exports.mem.buffer, p, n), + ) }, // func resetMemoryDataView() - "runtime.resetMemoryDataView": (sp) => { - sp >>>= 0; - this.mem = new DataView(this._inst.exports.mem.buffer); + 'runtime.resetMemoryDataView': sp => { + sp >>>= 0 + this.mem = new DataView(this._inst.exports.mem.buffer) }, // func nanotime1() int64 - "runtime.nanotime1": (sp) => { - sp >>>= 0; - setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000); + 'runtime.nanotime1': sp => { + sp >>>= 0 + setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000) }, // func walltime() (sec int64, nsec int32) - "runtime.walltime": (sp) => { - sp >>>= 0; - const msec = (new Date).getTime(); - setInt64(sp + 8, msec / 1000); - this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true); + 'runtime.walltime': sp => { + sp >>>= 0 + const msec = new Date().getTime() + setInt64(sp + 8, msec / 1000) + this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true) }, // func scheduleTimeoutEvent(delay int64) int32 - "runtime.scheduleTimeoutEvent": (sp) => { - sp >>>= 0; - const id = this._nextCallbackTimeoutID; - this._nextCallbackTimeoutID++; - this._scheduledTimeouts.set(id, setTimeout( + 'runtime.scheduleTimeoutEvent': sp => { + sp >>>= 0 + const id = this._nextCallbackTimeoutID + this._nextCallbackTimeoutID++ + this._scheduledTimeouts.set( + id, + setTimeout( () => { - this._resume(); + this._resume() while (this._scheduledTimeouts.has(id)) { // for some reason Go failed to register the timeout event, log and try again // (temporary workaround for https://github.com/golang/go/issues/28975) - console.warn("scheduleTimeoutEvent: missed timeout event"); - this._resume(); + console.warn('scheduleTimeoutEvent: missed timeout event') + this._resume() } }, getInt64(sp + 8), - )); - this.mem.setInt32(sp + 16, id, true); + ), + ) + this.mem.setInt32(sp + 16, id, true) }, // func clearTimeoutEvent(id int32) - "runtime.clearTimeoutEvent": (sp) => { - sp >>>= 0; - const id = this.mem.getInt32(sp + 8, true); - clearTimeout(this._scheduledTimeouts.get(id)); - this._scheduledTimeouts.delete(id); + 'runtime.clearTimeoutEvent': sp => { + sp >>>= 0 + const id = this.mem.getInt32(sp + 8, true) + clearTimeout(this._scheduledTimeouts.get(id)) + this._scheduledTimeouts.delete(id) }, // func getRandomData(r []byte) - "runtime.getRandomData": (sp) => { - sp >>>= 0; - crypto.getRandomValues(loadSlice(sp + 8)); + 'runtime.getRandomData': sp => { + sp >>>= 0 + crypto.getRandomValues(loadSlice(sp + 8)) }, // func finalizeRef(v ref) - "syscall/js.finalizeRef": (sp) => { - sp >>>= 0; - const id = this.mem.getUint32(sp + 8, true); - this._goRefCounts[id]--; + 'syscall/js.finalizeRef': sp => { + sp >>>= 0 + const id = this.mem.getUint32(sp + 8, true) + this._goRefCounts[id]-- if (this._goRefCounts[id] === 0) { - const v = this._values[id]; - this._values[id] = null; - this._ids.delete(v); - this._idPool.push(id); + const v = this._values[id] + this._values[id] = null + this._ids.delete(v) + this._idPool.push(id) } }, // func stringVal(value string) ref - "syscall/js.stringVal": (sp) => { - sp >>>= 0; - storeValue(sp + 24, loadString(sp + 8)); + 'syscall/js.stringVal': sp => { + sp >>>= 0 + storeValue(sp + 24, loadString(sp + 8)) }, // func valueGet(v ref, p string) ref - "syscall/js.valueGet": (sp) => { - sp >>>= 0; - const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16)); - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 32, result); + 'syscall/js.valueGet': sp => { + sp >>>= 0 + const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16)) + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 32, result) }, // func valueSet(v ref, p string, x ref) - "syscall/js.valueSet": (sp) => { - sp >>>= 0; - Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32)); + 'syscall/js.valueSet': sp => { + sp >>>= 0 + Reflect.set( + loadValue(sp + 8), + loadString(sp + 16), + loadValue(sp + 32), + ) }, // func valueDelete(v ref, p string) - "syscall/js.valueDelete": (sp) => { - sp >>>= 0; - Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16)); + 'syscall/js.valueDelete': sp => { + sp >>>= 0 + Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16)) }, // func valueIndex(v ref, i int) ref - "syscall/js.valueIndex": (sp) => { - sp >>>= 0; - storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16))); + 'syscall/js.valueIndex': sp => { + sp >>>= 0 + storeValue( + sp + 24, + Reflect.get(loadValue(sp + 8), getInt64(sp + 16)), + ) }, // valueSetIndex(v ref, i int, x ref) - "syscall/js.valueSetIndex": (sp) => { - sp >>>= 0; - Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24)); + 'syscall/js.valueSetIndex': sp => { + sp >>>= 0 + Reflect.set( + loadValue(sp + 8), + getInt64(sp + 16), + loadValue(sp + 24), + ) }, // func valueCall(v ref, m string, args []ref) (ref, bool) - "syscall/js.valueCall": (sp) => { - sp >>>= 0; + 'syscall/js.valueCall': sp => { + sp >>>= 0 try { - const v = loadValue(sp + 8); - const m = Reflect.get(v, loadString(sp + 16)); - const args = loadSliceOfValues(sp + 32); - const result = Reflect.apply(m, v, args); - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 56, result); - this.mem.setUint8(sp + 64, 1); + const v = loadValue(sp + 8) + const m = Reflect.get(v, loadString(sp + 16)) + const args = loadSliceOfValues(sp + 32) + const result = Reflect.apply(m, v, args) + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 56, result) + this.mem.setUint8(sp + 64, 1) } catch (err) { - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 56, err); - this.mem.setUint8(sp + 64, 0); + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 56, err) + this.mem.setUint8(sp + 64, 0) } }, // func valueInvoke(v ref, args []ref) (ref, bool) - "syscall/js.valueInvoke": (sp) => { - sp >>>= 0; + 'syscall/js.valueInvoke': sp => { + sp >>>= 0 try { - const v = loadValue(sp + 8); - const args = loadSliceOfValues(sp + 16); - const result = Reflect.apply(v, undefined, args); - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 40, result); - this.mem.setUint8(sp + 48, 1); + const v = loadValue(sp + 8) + const args = loadSliceOfValues(sp + 16) + const result = Reflect.apply(v, undefined, args) + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 40, result) + this.mem.setUint8(sp + 48, 1) } catch (err) { - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 40, err); - this.mem.setUint8(sp + 48, 0); + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 40, err) + this.mem.setUint8(sp + 48, 0) } }, // func valueNew(v ref, args []ref) (ref, bool) - "syscall/js.valueNew": (sp) => { - sp >>>= 0; + 'syscall/js.valueNew': sp => { + sp >>>= 0 try { - const v = loadValue(sp + 8); - const args = loadSliceOfValues(sp + 16); - const result = Reflect.construct(v, args); - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 40, result); - this.mem.setUint8(sp + 48, 1); + const v = loadValue(sp + 8) + const args = loadSliceOfValues(sp + 16) + const result = Reflect.construct(v, args) + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 40, result) + this.mem.setUint8(sp + 48, 1) } catch (err) { - sp = this._inst.exports.getsp() >>> 0; // see comment above - storeValue(sp + 40, err); - this.mem.setUint8(sp + 48, 0); + sp = this._inst.exports.getsp() >>> 0 // see comment above + storeValue(sp + 40, err) + this.mem.setUint8(sp + 48, 0) } }, // func valueLength(v ref) int - "syscall/js.valueLength": (sp) => { - sp >>>= 0; - setInt64(sp + 16, parseInt(loadValue(sp + 8).length)); + 'syscall/js.valueLength': sp => { + sp >>>= 0 + setInt64(sp + 16, parseInt(loadValue(sp + 8).length)) }, // valuePrepareString(v ref) (ref, int) - "syscall/js.valuePrepareString": (sp) => { - sp >>>= 0; - const str = encoder.encode(String(loadValue(sp + 8))); - storeValue(sp + 16, str); - setInt64(sp + 24, str.length); + 'syscall/js.valuePrepareString': sp => { + sp >>>= 0 + const str = encoder.encode(String(loadValue(sp + 8))) + storeValue(sp + 16, str) + setInt64(sp + 24, str.length) }, // valueLoadString(v ref, b []byte) - "syscall/js.valueLoadString": (sp) => { - sp >>>= 0; - const str = loadValue(sp + 8); - loadSlice(sp + 16).set(str); + 'syscall/js.valueLoadString': sp => { + sp >>>= 0 + const str = loadValue(sp + 8) + loadSlice(sp + 16).set(str) }, // func valueInstanceOf(v ref, t ref) bool - "syscall/js.valueInstanceOf": (sp) => { - sp >>>= 0; - this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0); + 'syscall/js.valueInstanceOf': sp => { + sp >>>= 0 + this.mem.setUint8( + sp + 24, + loadValue(sp + 8) instanceof loadValue(sp + 16) ? 1 : 0, + ) }, // func copyBytesToGo(dst []byte, src ref) (int, bool) - "syscall/js.copyBytesToGo": (sp) => { - sp >>>= 0; - const dst = loadSlice(sp + 8); - const src = loadValue(sp + 32); - if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) { - this.mem.setUint8(sp + 48, 0); - return; + 'syscall/js.copyBytesToGo': sp => { + sp >>>= 0 + const dst = loadSlice(sp + 8) + const src = loadValue(sp + 32) + if ( + !(src instanceof Uint8Array || src instanceof Uint8ClampedArray) + ) { + this.mem.setUint8(sp + 48, 0) + return } - const toCopy = src.subarray(0, dst.length); - dst.set(toCopy); - setInt64(sp + 40, toCopy.length); - this.mem.setUint8(sp + 48, 1); + const toCopy = src.subarray(0, dst.length) + dst.set(toCopy) + setInt64(sp + 40, toCopy.length) + this.mem.setUint8(sp + 48, 1) }, // func copyBytesToJS(dst ref, src []byte) (int, bool) - "syscall/js.copyBytesToJS": (sp) => { - sp >>>= 0; - const dst = loadValue(sp + 8); - const src = loadSlice(sp + 16); - if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) { - this.mem.setUint8(sp + 48, 0); - return; + 'syscall/js.copyBytesToJS': sp => { + sp >>>= 0 + const dst = loadValue(sp + 8) + const src = loadSlice(sp + 16) + if ( + !(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray) + ) { + this.mem.setUint8(sp + 48, 0) + return } - const toCopy = src.subarray(0, dst.length); - dst.set(toCopy); - setInt64(sp + 40, toCopy.length); - this.mem.setUint8(sp + 48, 1); + const toCopy = src.subarray(0, dst.length) + dst.set(toCopy) + setInt64(sp + 40, toCopy.length) + this.mem.setUint8(sp + 48, 1) }, - "debug": (value) => { - console.log(value); + debug: value => { + console.log(value) }, - } - }; + }, + } } async run(instance) { if (!(instance instanceof WebAssembly.Instance)) { - throw new Error("Go.run: WebAssembly.Instance expected"); + throw new Error('Go.run: WebAssembly.Instance expected') } - this._inst = instance; - this.mem = new DataView(this._inst.exports.mem.buffer); - this._values = [ // JS values that Go currently has references to, indexed by reference id + this._inst = instance + this.mem = new DataView(this._inst.exports.mem.buffer) + this._values = [ + // JS values that Go currently has references to, indexed by reference id NaN, 0, null, @@ -490,86 +594,89 @@ false, globalThis, this, - ]; - this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id - this._ids = new Map([ // mapping from JS values to reference ids + ] + this._goRefCounts = new Array(this._values.length).fill(Infinity) // number of references that Go has to a JS value, indexed by reference id + this._ids = new Map([ + // mapping from JS values to reference ids [0, 1], [null, 2], [true, 3], [false, 4], [globalThis, 5], [this, 6], - ]); - this._idPool = []; // unused ids that have been garbage collected - this.exited = false; // whether the Go program has exited + ]) + this._idPool = [] // unused ids that have been garbage collected + this.exited = false // whether the Go program has exited // Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory. - let offset = 4096; + let offset = 4096 - const strPtr = (str) => { - const ptr = offset; - const bytes = encoder.encode(str + "\0"); - new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes); - offset += bytes.length; + const strPtr = str => { + const ptr = offset + const bytes = encoder.encode(str + '\0') + new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes) + offset += bytes.length if (offset % 8 !== 0) { - offset += 8 - (offset % 8); + offset += 8 - (offset % 8) } - return ptr; - }; - - const argc = this.argv.length; - - const argvPtrs = []; - this.argv.forEach((arg) => { - argvPtrs.push(strPtr(arg)); - }); - argvPtrs.push(0); - - const keys = Object.keys(this.env).sort(); - keys.forEach((key) => { - argvPtrs.push(strPtr(`${key}=${this.env[key]}`)); - }); - argvPtrs.push(0); - - const argv = offset; - argvPtrs.forEach((ptr) => { - this.mem.setUint32(offset, ptr, true); - this.mem.setUint32(offset + 4, 0, true); - offset += 8; - }); + return ptr + } + + const argc = this.argv.length + + const argvPtrs = [] + this.argv.forEach(arg => { + argvPtrs.push(strPtr(arg)) + }) + argvPtrs.push(0) + + const keys = Object.keys(this.env).sort() + keys.forEach(key => { + argvPtrs.push(strPtr(`${key}=${this.env[key]}`)) + }) + argvPtrs.push(0) + + const argv = offset + argvPtrs.forEach(ptr => { + this.mem.setUint32(offset, ptr, true) + this.mem.setUint32(offset + 4, 0, true) + offset += 8 + }) // The linker guarantees global data starts from at least wasmMinDataAddr. // Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr. - const wasmMinDataAddr = 4096 + 8192; + const wasmMinDataAddr = 4096 + 8192 if (offset >= wasmMinDataAddr) { - throw new Error("total length of command line and environment variables exceeds limit"); + throw new Error( + 'total length of command line and environment variables exceeds limit', + ) } - this._inst.exports.run(argc, argv); + this._inst.exports.run(argc, argv) if (this.exited) { - this._resolveExitPromise(); + this._resolveExitPromise() } - await this._exitPromise; + await this._exitPromise } _resume() { if (this.exited) { - throw new Error("Go program has already exited"); + throw new Error('Go program has already exited') } - this._inst.exports.resume(); + this._inst.exports.resume() if (this.exited) { - this._resolveExitPromise(); + this._resolveExitPromise() } } _makeFuncWrapper(id) { - const go = this; + const go = this return function () { - const event = { id: id, this: this, args: arguments }; - go._pendingEvent = event; - go._resume(); - return event.result; - }; + const event = { id: id, this: this, args: arguments } + go._pendingEvent = event + go._resume() + return event.result + } } } -})(); +})()