642 lines
18 KiB
JavaScript
Vendored
642 lines
18 KiB
JavaScript
Vendored
// Copyright 2018 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
//
|
|
// This file has been modified for use by the TinyGo compiler.
|
|
|
|
(() => {
|
|
// Map multiple JavaScript environments to a single common API,
|
|
// preferring web standards over Node.js API.
|
|
//
|
|
// Environments considered:
|
|
// - Browsers
|
|
// - Node.js
|
|
// - Electron
|
|
// - Parcel
|
|
|
|
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;
|
|
}
|
|
|
|
if (!global.fs && global.require) {
|
|
global.fs = require("node:fs");
|
|
}
|
|
|
|
const enosys = () => {
|
|
const err = new Error("not implemented");
|
|
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,
|
|
}, // unused
|
|
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 = 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 (!global.process) {
|
|
global.process = {
|
|
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();
|
|
},
|
|
};
|
|
}
|
|
|
|
if (!global.crypto) {
|
|
const nodeCrypto = require("node:crypto");
|
|
global.crypto = {
|
|
getRandomValues(b) {
|
|
nodeCrypto.randomFillSync(b);
|
|
},
|
|
};
|
|
}
|
|
|
|
if (!global.performance) {
|
|
global.performance = {
|
|
now() {
|
|
const [sec, nsec] = process.hrtime();
|
|
return sec * 1000 + nsec / 1000000;
|
|
},
|
|
};
|
|
}
|
|
|
|
if (!global.TextEncoder) {
|
|
global.TextEncoder = require("node:util").TextEncoder;
|
|
}
|
|
|
|
if (!global.TextDecoder) {
|
|
global.TextDecoder = require("node:util").TextDecoder;
|
|
}
|
|
|
|
// End of polyfills for common API.
|
|
|
|
const encoder = new TextEncoder("utf-8");
|
|
const decoder = new TextDecoder("utf-8");
|
|
let reinterpretBuf = new DataView(new ArrayBuffer(8));
|
|
var logLine = [];
|
|
|
|
global.Go = class {
|
|
constructor() {
|
|
this._callbackTimeouts = new Map();
|
|
this._nextCallbackTimeoutID = 1;
|
|
|
|
const mem = () => {
|
|
// The buffer may change when requesting more memory.
|
|
return new DataView(this._inst.exports.memory.buffer);
|
|
};
|
|
|
|
const unboxValue = (v_ref) => {
|
|
reinterpretBuf.setBigInt64(0, v_ref, true);
|
|
const f = reinterpretBuf.getFloat64(0, true);
|
|
if (f === 0) {
|
|
return undefined;
|
|
}
|
|
if (!isNaN(f)) {
|
|
return f;
|
|
}
|
|
|
|
const id = v_ref & 0xffffffffn;
|
|
return this._values[id];
|
|
};
|
|
|
|
const loadValue = (addr) => {
|
|
let v_ref = mem().getBigUint64(addr, true);
|
|
return unboxValue(v_ref);
|
|
};
|
|
|
|
const boxValue = (v) => {
|
|
const nanHead = 0x7FF80000n;
|
|
|
|
if (typeof v === "number") {
|
|
if (isNaN(v)) {
|
|
return nanHead << 32n;
|
|
}
|
|
if (v === 0) {
|
|
return (nanHead << 32n) | 1n;
|
|
}
|
|
reinterpretBuf.setFloat64(0, v, true);
|
|
return reinterpretBuf.getBigInt64(0, true);
|
|
}
|
|
|
|
switch (v) {
|
|
case undefined:
|
|
return 0n;
|
|
case null:
|
|
return (nanHead << 32n) | 2n;
|
|
case true:
|
|
return (nanHead << 32n) | 3n;
|
|
case false:
|
|
return (nanHead << 32n) | 4n;
|
|
}
|
|
|
|
let id = this._ids.get(v);
|
|
if (id === undefined) {
|
|
id = this._idPool.pop();
|
|
if (id === undefined) {
|
|
id = BigInt(this._values.length);
|
|
}
|
|
this._values[id] = v;
|
|
this._goRefCounts[id] = 0;
|
|
this._ids.set(v, id);
|
|
}
|
|
this._goRefCounts[id]++;
|
|
let typeFlag = 1n;
|
|
switch (typeof v) {
|
|
case "string":
|
|
typeFlag = 2n;
|
|
break;
|
|
case "symbol":
|
|
typeFlag = 3n;
|
|
break;
|
|
case "function":
|
|
typeFlag = 4n;
|
|
break;
|
|
}
|
|
return id | ((nanHead | typeFlag) << 32n);
|
|
};
|
|
|
|
const storeValue = (addr, v) => {
|
|
let v_ref = boxValue(v);
|
|
mem().setBigUint64(addr, v_ref, true);
|
|
};
|
|
|
|
const loadSlice = (array, len, cap) => {
|
|
return new Uint8Array(this._inst.exports.memory.buffer, array, len);
|
|
};
|
|
|
|
const loadSliceOfValues = (array, len, cap) => {
|
|
const a = new Array(len);
|
|
for (let i = 0; i < len; i++) {
|
|
a[i] = loadValue(array + i * 8);
|
|
}
|
|
return a;
|
|
};
|
|
|
|
const loadString = (ptr, len) => {
|
|
return decoder.decode(
|
|
new DataView(this._inst.exports.memory.buffer, ptr, len),
|
|
);
|
|
};
|
|
|
|
const timeOrigin = Date.now() - performance.now();
|
|
this.importObject = {
|
|
wasi_snapshot_preview1: {
|
|
// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#fd_write
|
|
fd_write: function (fd, iovs_ptr, iovs_len, nwritten_ptr) {
|
|
let nwritten = 0;
|
|
if (fd == 1) {
|
|
for (let iovs_i = 0; iovs_i < iovs_len; iovs_i++) {
|
|
let iov_ptr = iovs_ptr + iovs_i * 8; // assuming wasm32
|
|
let ptr = mem().getUint32(iov_ptr + 0, true);
|
|
let len = mem().getUint32(iov_ptr + 4, true);
|
|
nwritten += len;
|
|
for (let i = 0; i < len; i++) {
|
|
let c = mem().getUint8(ptr + i);
|
|
if (c == 13) { // CR
|
|
// ignore
|
|
} else if (c == 10) { // LF
|
|
// write line
|
|
let line = decoder.decode(new Uint8Array(logLine));
|
|
logLine = [];
|
|
console.log(line);
|
|
} else {
|
|
logLine.push(c);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
console.error("invalid file descriptor:", fd);
|
|
}
|
|
mem().setUint32(nwritten_ptr, nwritten, true);
|
|
return 0;
|
|
},
|
|
fd_close: () => 0, // dummy
|
|
fd_fdstat_get: () => 0, // dummy
|
|
fd_seek: () => 0, // dummy
|
|
"proc_exit": (code) => {
|
|
if (global.process) {
|
|
// Node.js
|
|
process.exit(code);
|
|
} else {
|
|
// Can't exit in a browser.
|
|
throw "trying to exit with code " + code;
|
|
}
|
|
},
|
|
random_get: (bufPtr, bufLen) => {
|
|
crypto.getRandomValues(loadSlice(bufPtr, bufLen));
|
|
return 0;
|
|
},
|
|
},
|
|
gojs: {
|
|
// func ticks() float64
|
|
"runtime.ticks": () => {
|
|
return timeOrigin + performance.now();
|
|
},
|
|
|
|
// func sleepTicks(timeout float64)
|
|
"runtime.sleepTicks": (timeout) => {
|
|
// Do not sleep, only reactivate scheduler after the given timeout.
|
|
setTimeout(this._inst.exports.go_scheduler, timeout);
|
|
},
|
|
|
|
// func finalizeRef(v ref)
|
|
"syscall/js.finalizeRef": (v_ref) => {
|
|
// Note: TinyGo does not support finalizers so this should never be
|
|
// called.
|
|
console.error("syscall/js.finalizeRef not implemented");
|
|
},
|
|
|
|
// func stringVal(value string) ref
|
|
"syscall/js.stringVal": (value_ptr, value_len) => {
|
|
const s = loadString(value_ptr, value_len);
|
|
return boxValue(s);
|
|
},
|
|
|
|
// func valueGet(v ref, p string) ref
|
|
"syscall/js.valueGet": (v_ref, p_ptr, p_len) => {
|
|
let prop = loadString(p_ptr, p_len);
|
|
let v = unboxValue(v_ref);
|
|
let result = Reflect.get(v, prop);
|
|
return boxValue(result);
|
|
},
|
|
|
|
// func valueSet(v ref, p string, x ref)
|
|
"syscall/js.valueSet": (v_ref, p_ptr, p_len, x_ref) => {
|
|
const v = unboxValue(v_ref);
|
|
const p = loadString(p_ptr, p_len);
|
|
const x = unboxValue(x_ref);
|
|
Reflect.set(v, p, x);
|
|
},
|
|
|
|
// func valueDelete(v ref, p string)
|
|
"syscall/js.valueDelete": (v_ref, p_ptr, p_len) => {
|
|
const v = unboxValue(v_ref);
|
|
const p = loadString(p_ptr, p_len);
|
|
Reflect.deleteProperty(v, p);
|
|
},
|
|
|
|
// func valueIndex(v ref, i int) ref
|
|
"syscall/js.valueIndex": (v_ref, i) => {
|
|
return boxValue(Reflect.get(unboxValue(v_ref), i));
|
|
},
|
|
|
|
// valueSetIndex(v ref, i int, x ref)
|
|
"syscall/js.valueSetIndex": (v_ref, i, x_ref) => {
|
|
Reflect.set(unboxValue(v_ref), i, unboxValue(x_ref));
|
|
},
|
|
|
|
// func valueCall(v ref, m string, args []ref) (ref, bool)
|
|
"syscall/js.valueCall": (
|
|
ret_addr,
|
|
v_ref,
|
|
m_ptr,
|
|
m_len,
|
|
args_ptr,
|
|
args_len,
|
|
args_cap,
|
|
) => {
|
|
const v = unboxValue(v_ref);
|
|
const name = loadString(m_ptr, m_len);
|
|
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
|
|
try {
|
|
const m = Reflect.get(v, name);
|
|
storeValue(ret_addr, Reflect.apply(m, v, args));
|
|
mem().setUint8(ret_addr + 8, 1);
|
|
} catch (err) {
|
|
storeValue(ret_addr, err);
|
|
mem().setUint8(ret_addr + 8, 0);
|
|
}
|
|
},
|
|
|
|
// func valueInvoke(v ref, args []ref) (ref, bool)
|
|
"syscall/js.valueInvoke": (
|
|
ret_addr,
|
|
v_ref,
|
|
args_ptr,
|
|
args_len,
|
|
args_cap,
|
|
) => {
|
|
try {
|
|
const v = unboxValue(v_ref);
|
|
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
|
|
storeValue(ret_addr, Reflect.apply(v, undefined, args));
|
|
mem().setUint8(ret_addr + 8, 1);
|
|
} catch (err) {
|
|
storeValue(ret_addr, err);
|
|
mem().setUint8(ret_addr + 8, 0);
|
|
}
|
|
},
|
|
|
|
// func valueNew(v ref, args []ref) (ref, bool)
|
|
"syscall/js.valueNew": (
|
|
ret_addr,
|
|
v_ref,
|
|
args_ptr,
|
|
args_len,
|
|
args_cap,
|
|
) => {
|
|
const v = unboxValue(v_ref);
|
|
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
|
|
try {
|
|
storeValue(ret_addr, Reflect.construct(v, args));
|
|
mem().setUint8(ret_addr + 8, 1);
|
|
} catch (err) {
|
|
storeValue(ret_addr, err);
|
|
mem().setUint8(ret_addr + 8, 0);
|
|
}
|
|
},
|
|
|
|
// func valueLength(v ref) int
|
|
"syscall/js.valueLength": (v_ref) => {
|
|
return unboxValue(v_ref).length;
|
|
},
|
|
|
|
// valuePrepareString(v ref) (ref, int)
|
|
"syscall/js.valuePrepareString": (ret_addr, v_ref) => {
|
|
const s = String(unboxValue(v_ref));
|
|
const str = encoder.encode(s);
|
|
storeValue(ret_addr, str);
|
|
mem().setInt32(ret_addr + 8, str.length, true);
|
|
},
|
|
|
|
// valueLoadString(v ref, b []byte)
|
|
"syscall/js.valueLoadString": (
|
|
v_ref,
|
|
slice_ptr,
|
|
slice_len,
|
|
slice_cap,
|
|
) => {
|
|
const str = unboxValue(v_ref);
|
|
loadSlice(slice_ptr, slice_len, slice_cap).set(str);
|
|
},
|
|
|
|
// func valueInstanceOf(v ref, t ref) bool
|
|
"syscall/js.valueInstanceOf": (v_ref, t_ref) => {
|
|
return unboxValue(v_ref) instanceof unboxValue(t_ref);
|
|
},
|
|
|
|
// func copyBytesToGo(dst []byte, src ref) (int, bool)
|
|
"syscall/js.copyBytesToGo": (
|
|
ret_addr,
|
|
dest_addr,
|
|
dest_len,
|
|
dest_cap,
|
|
src_ref,
|
|
) => {
|
|
let num_bytes_copied_addr = ret_addr;
|
|
let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
|
|
|
|
const dst = loadSlice(dest_addr, dest_len);
|
|
const src = unboxValue(src_ref);
|
|
if (
|
|
!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)
|
|
) {
|
|
mem().setUint8(returned_status_addr, 0); // Return "not ok" status
|
|
return;
|
|
}
|
|
const toCopy = src.subarray(0, dst.length);
|
|
dst.set(toCopy);
|
|
mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
|
|
mem().setUint8(returned_status_addr, 1); // Return "ok" status
|
|
},
|
|
|
|
// copyBytesToJS(dst ref, src []byte) (int, bool)
|
|
// Originally copied from upstream Go project, then modified:
|
|
// https://github.com/golang/go/blob/3f995c3f3b43033013013e6c7ccc93a9b1411ca9/misc/wasm/wasm_exec.js#L404-L416
|
|
"syscall/js.copyBytesToJS": (
|
|
ret_addr,
|
|
dst_ref,
|
|
src_addr,
|
|
src_len,
|
|
src_cap,
|
|
) => {
|
|
let num_bytes_copied_addr = ret_addr;
|
|
let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
|
|
|
|
const dst = unboxValue(dst_ref);
|
|
const src = loadSlice(src_addr, src_len);
|
|
if (
|
|
!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)
|
|
) {
|
|
mem().setUint8(returned_status_addr, 0); // Return "not ok" status
|
|
return;
|
|
}
|
|
const toCopy = src.subarray(0, dst.length);
|
|
dst.set(toCopy);
|
|
mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
|
|
mem().setUint8(returned_status_addr, 1); // Return "ok" status
|
|
},
|
|
},
|
|
};
|
|
|
|
// Go 1.20 uses 'env'. Go 1.21 uses 'gojs'.
|
|
// For compatibility, we use both as long as Go 1.20 is supported.
|
|
this.importObject.env = this.importObject.gojs;
|
|
}
|
|
|
|
async run(instance) {
|
|
this._inst = instance;
|
|
this._values = [ // JS values that Go currently has references to, indexed by reference id
|
|
NaN,
|
|
0,
|
|
null,
|
|
true,
|
|
false,
|
|
global,
|
|
this,
|
|
];
|
|
this._goRefCounts = []; // 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._idPool = []; // unused ids that have been garbage collected
|
|
this.exited = false; // whether the Go program has exited
|
|
|
|
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); // make sure it is asynchronous
|
|
};
|
|
});
|
|
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();
|
|
if (this.exited) {
|
|
this._resolveExitPromise();
|
|
}
|
|
}
|
|
|
|
_makeFuncWrapper(id) {
|
|
const go = this;
|
|
return function () {
|
|
const event = { id: id, this: this, args: arguments };
|
|
go._pendingEvent = event;
|
|
go._resume();
|
|
return event.result;
|
|
};
|
|
}
|
|
};
|
|
|
|
if (
|
|
global.require &&
|
|
global.require.main === module &&
|
|
global.process &&
|
|
global.process.versions &&
|
|
!global.process.versions.electron
|
|
) {
|
|
if (process.argv.length != 3) {
|
|
console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
|
|
process.exit(1);
|
|
}
|
|
|
|
const go = new Go();
|
|
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject)
|
|
.then((result) => {
|
|
return go.run(result.instance);
|
|
}).catch((err) => {
|
|
console.error(err);
|
|
process.exit(1);
|
|
});
|
|
}
|
|
})();
|