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WIP: WASM port - switch to ncruces/go-sqlite3, add WASM stubs

Browse Source 
- Switched from modernc.org/sqlite to ncruces/go-sqlite3 for WASM support
- Added WASM-specific stubs for daemon process management
- Created wasm/ directory with build.sh and Node.js runner
- WASM build succeeds (32MB bd.wasm)
- Node.js can load and execute the WASM module
- Next: Need to bridge Go file I/O to Node.js fs module

Related: bd-44d0, bd-8534, bd-c7eb
This commit is contained in:
Steve Yegge
2025-11-02 22:17:08 -08:00
parent d5dde7c753
commit 9ce1d6c7a5
15 changed files with 697 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
.beads/beads.jsonl
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@@ -136,6 +136,7 @@
{"id":"bd-833559b3","content_hash":"9082c986207b9df7a7a4dc87a53007849e2b9f6e92f3bea41e22d6a14f1f6f42","title":"bd validate - Comprehensive health check","description":"Run all validation checks in one command.\n\nChecks:\n- Duplicates\n- Orphaned dependencies\n- Test pollution\n- Git conflicts\n\nSupports --fix-all for auto-repair.\n\nDepends on bd-cbed9619.1, bd-0dcea000, bd-2752a7a2, bd-9826b69a.\n\nFiles: cmd/bd/validate.go (new)","status":"open","priority":1,"issue_type":"task","created_at":"2025-10-29T20:02:47.957692-07:00","updated_at":"2025-10-30T17:12:58.219095-07:00"}
{"id":"bd-83f0bb64","content_hash":"c7be091ee7e713dd9c8ec0f9a498a9ae12adb09f8b7510a5ec10a815a05322e1","title":"Platform tests: Linux, macOS, Windows","description":"Test event-driven mode on all platforms. Verify inotify (Linux), FSEvents (macOS), ReadDirectoryChangesW (Windows). Test fallback behavior on each.","status":"closed","priority":1,"issue_type":"task","created_at":"2025-10-29T19:42:29.857419-07:00","updated_at":"2025-10-31T12:00:43.197445-07:00","closed_at":"2025-10-31T12:00:43.197445-07:00"}
{"id":"bd-8507","content_hash":"51fb0926b232fb293c302b859731ce71198e0eb8a037c95bc4ae848c2df41a1d","title":"Publish bd-wasm to npm","description":"Package and publish WASM build to npm. Child of epic bd-44d0.\n\n## Tasks\n- [ ] Optimize WASM bundle (compression)\n- [ ] Create README for npm package\n- [ ] Set up npm publishing workflow\n- [ ] Publish v0.1.0-alpha\n- [ ] Test installation in clean environment\n- [ ] Update beads AGENTS.md with installation instructions\n\n## Package Name\nbd-wasm (or @beads/wasm-cli)","status":"open","priority":0,"issue_type":"task","created_at":"2025-11-02T18:33:31.371535-08:00","updated_at":"2025-11-02T18:33:31.371535-08:00","dependencies":[{"issue_id":"bd-8507","depends_on_id":"bd-197b","type":"blocks","created_at":"2025-11-02T18:33:31.372224-08:00","created_by":"daemon"}]}
{"id":"bd-8534","content_hash":"001e0ffe353115fbbaad39f392208ddd8ceaa515cdbab9f616a85b63b45f0d0e","title":"Switch from modernc.org/sqlite to ncruces/go-sqlite3 for WASM support","description":"modernc.org/sqlite depends on modernc.org/libc which has no js/wasm support (platform-specific syscalls). Need to switch to ncruces/go-sqlite3 which wraps a WASM build of SQLite using wazero runtime.\n\nKey differences:\n- ncruces/go-sqlite3: Uses WASM build of SQLite + wazero runtime\n- modernc.org/sqlite: Pure Go translation, requires libc for syscalls\n\nThis is a prerequisite for bd-62a0 (WASM build infrastructure).","status":"open","priority":1,"issue_type":"task","created_at":"2025-11-02T22:14:27.627154-08:00","updated_at":"2025-11-02T22:14:27.627154-08:00"}
{"id":"bd-85487065","content_hash":"637cbd56af122b175ff060b4df050871fe86124c5d883ba7f8a17f2f95479613","title":"Add tests for internal/autoimport package","description":"Currently 0.0% coverage. Need tests for auto-import functionality that detects and imports updated JSONL files.","status":"open","priority":2,"issue_type":"task","created_at":"2025-10-29T14:06:18.154805-07:00","updated_at":"2025-10-30T17:12:58.182987-07:00"}
{"id":"bd-879d","content_hash":"2f291ca2adead5ee3fb7fade39c088165b5467780599f9a719dcaebc87455ae3","title":"Test issue 1","description":"","status":"closed","priority":2,"issue_type":"task","created_at":"2025-11-02T09:44:12.538697729Z","updated_at":"2025-11-02T09:45:20.76214671Z","closed_at":"2025-11-02T09:45:20.76214671Z","dependencies":[{"issue_id":"bd-879d","depends_on_id":"bd-d3e5","type":"discovered-from","created_at":"2025-11-02T09:44:22.103468321Z","created_by":"mrdavidlaing"}]}
{"id":"bd-8900f145","content_hash":"4a07f36a9e5d24aaffb092c89e2273cb58f9de357d24eeb01fcde6a4079ba775","title":"Testing event-driven mode!","description":"","status":"closed","priority":2,"issue_type":"task","created_at":"2025-10-29T15:28:33.564871-07:00","updated_at":"2025-10-30T17:12:58.186325-07:00","closed_at":"2025-10-29T19:12:54.43368-07:00"}

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bd-test Executable file
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14
cmd/bd/daemon_lock_wasm.go Normal file
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@@ -0,0 +1,14 @@
//go:build js && wasm
package main
import (
"fmt"
"os"
)
func flockExclusive(f *os.File) error {
// WASM doesn't support file locking
// In a WASM environment, we're typically single-process anyway
return fmt.Errorf("file locking not supported in WASM")
}

28
cmd/bd/daemon_wasm.go Normal file
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@@ -0,0 +1,28 @@
//go:build js && wasm
package main
import (
"fmt"
"os"
"os/exec"
)
// WASM doesn't support signals or process management
var daemonSignals = []os.Signal{}
func configureDaemonProcess(cmd *exec.Cmd) {
// No-op in WASM
}
func sendStopSignal(process *os.Process) error {
return fmt.Errorf("daemon operations not supported in WASM")
}
func isReloadSignal(sig os.Signal) bool {
return false
}
func isProcessRunning(pid int) bool {
return false
}

3
cmd/bd/doctor.go
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@@ -16,7 +16,8 @@ import (
"github.com/steveyegge/beads"
"github.com/steveyegge/beads/internal/configfile"
"github.com/steveyegge/beads/internal/daemon"
_ "modernc.org/sqlite"
_ "github.com/ncruces/go-sqlite3/driver"
_ "github.com/ncruces/go-sqlite3/embed"
)
// Status constants for doctor checks

3
cmd/bd/migrate.go
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@@ -16,7 +16,8 @@ import (
"github.com/steveyegge/beads/internal/storage/sqlite"
"github.com/steveyegge/beads/internal/types"
"github.com/steveyegge/beads/internal/utils"
_ "modernc.org/sqlite"
_ "github.com/ncruces/go-sqlite3/driver"
_ "github.com/ncruces/go-sqlite3/embed"
)
var migrateCmd = &cobra.Command{

5
go.mod
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@@ -24,7 +24,9 @@ require (
github.com/inconshreveable/mousetrap v1.1.0 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/ncruces/go-sqlite3 v0.29.1 // indirect
github.com/ncruces/go-strftime v0.1.9 // indirect
github.com/ncruces/julianday v1.0.0 // indirect
github.com/pelletier/go-toml/v2 v2.2.4 // indirect
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
github.com/sagikazarmark/locafero v0.11.0 // indirect
@@ -33,13 +35,14 @@ require (
github.com/spf13/cast v1.10.0 // indirect
github.com/spf13/pflag v1.0.10 // indirect
github.com/subosito/gotenv v1.6.0 // indirect
github.com/tetratelabs/wazero v1.9.0 // indirect
github.com/tidwall/gjson v1.18.0 // indirect
github.com/tidwall/match v1.1.1 // indirect
github.com/tidwall/pretty v1.2.1 // indirect
github.com/tidwall/sjson v1.2.5 // indirect
go.yaml.in/yaml/v3 v3.0.4 // indirect
golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b // indirect
golang.org/x/text v0.28.0 // indirect
golang.org/x/text v0.29.0 // indirect
golang.org/x/tools v0.37.0 // indirect
modernc.org/libc v1.66.3 // indirect
modernc.org/mathutil v1.7.1 // indirect

8
go.sum
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@@ -30,8 +30,12 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
github.com/ncruces/go-sqlite3 v0.29.1 h1:NIi8AISWBToRHyoz01FXiTNvU147Tqdibgj2tFzJCqM=
github.com/ncruces/go-sqlite3 v0.29.1/go.mod h1:PpccBNNhvjwUOwDQEn2gXQPFPTWdlromj0+fSkd5KSg=
github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -60,6 +64,8 @@ github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
github.com/tetratelabs/wazero v1.9.0 h1:IcZ56OuxrtaEz8UYNRHBrUa9bYeX9oVY93KspZZBf/I=
github.com/tetratelabs/wazero v1.9.0/go.mod h1:TSbcXCfFP0L2FGkRPxHphadXPjo1T6W+CseNNY7EkjM=
github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
@@ -84,6 +90,8 @@ golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
golang.org/x/tools v0.37.0 h1:DVSRzp7FwePZW356yEAChSdNcQo6Nsp+fex1SUW09lE=
golang.org/x/tools v0.37.0/go.mod h1:MBN5QPQtLMHVdvsbtarmTNukZDdgwdwlO5qGacAzF0w=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

20
internal/daemon/kill_wasm.go Normal file
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@@ -0,0 +1,20 @@
//go:build js && wasm
package daemon
import "fmt"
// WASM doesn't support process management, so these are stubs
// Daemon mode is not supported in WASM environments
func killProcess(pid int) error {
return fmt.Errorf("daemon operations not supported in WASM")
}
func forceKillProcess(pid int) error {
return fmt.Errorf("daemon operations not supported in WASM")
}
func isProcessAlive(pid int) bool {
return false
}

5
internal/storage/sqlite/sqlite.go
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@@ -14,7 +14,8 @@ import (
// Import SQLite driver
"github.com/steveyegge/beads/internal/types"
_ "modernc.org/sqlite"
_ "github.com/ncruces/go-sqlite3/driver"
_ "github.com/ncruces/go-sqlite3/embed"
)
// SQLiteStorage implements the Storage interface using SQLite
@@ -56,7 +57,7 @@ func New(path string) (*SQLiteStorage, error) {
connStr += "?_pragma=journal_mode(WAL)&_pragma=foreign_keys(ON)&_pragma=busy_timeout(30000)&_time_format=sqlite"
}
db, err := sql.Open("sqlite", connStr)
db, err := sql.Open("sqlite3", connStr)
if err != nil {
return nil, fmt.Errorf("failed to open database: %w", err)
}

3
internal/storage/sqlite/sqlite_test.go
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@@ -8,7 +8,8 @@ import (
"time"
"github.com/steveyegge/beads/internal/types"
_ "modernc.org/sqlite"
_ "github.com/ncruces/go-sqlite3/driver"
_ "github.com/ncruces/go-sqlite3/embed"
)
func setupTestDB(t *testing.T) (*SQLiteStorage, func()) {

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wasm/bd.wasm Executable file
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10
wasm/build.sh Executable file
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@@ -0,0 +1,10 @@
#!/bin/bash
# Build bd for WebAssembly
set -e
echo "Building bd for WASM..."
GOOS=js GOARCH=wasm go build -o wasm/bd.wasm ./cmd/bd
echo "WASM build complete: wasm/bd.wasm"
ls -lh wasm/bd.wasm

28
wasm/run.js Normal file
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@@ -0,0 +1,28 @@
#!/usr/bin/env node
// Node.js wrapper for bd.wasm
const fs = require('fs');
const path = require('path');
// Load wasm_exec.js from Go distribution
require('./wasm_exec.js');
// Load the WASM binary
const wasmPath = path.join(__dirname, 'bd.wasm');
const wasmBuffer = fs.readFileSync(wasmPath);
// Create Go runtime instance
const go = new Go();
// Pass command-line arguments to Go
// process.argv[0] is 'node', process.argv[1] is this script
// So we want process.argv.slice(1) to simulate: bd <args>
go.argv = ['bd'].concat(process.argv.slice(2));
// Instantiate and run the WASM module
WebAssembly.instantiate(wasmBuffer, go.importObject).then((result) => {
go.run(result.instance);
}).catch((err) => {
console.error('Failed to run WASM:', err);
process.exit(1);
});

575
wasm/wasm_exec.js Normal file
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@@ -0,0 +1,575 @@
// 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.
"use strict";
(() => {
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
if (!globalThis.fs) {
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
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substring(0, nl));
outputBuf = outputBuf.substring(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 (!globalThis.process) {
globalThis.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 (!globalThis.path) {
globalThis.path = {
resolve(...pathSegments) {
return pathSegments.join("/");
}
}
}
if (!globalThis.crypto) {
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)");
}
if (!globalThis.TextEncoder) {
throw new Error("globalThis.TextEncoder is not available, polyfill required");
}
if (!globalThis.TextDecoder) {
throw new Error("globalThis.TextDecoder is not available, polyfill required");
}
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
globalThis.Go = class {
constructor() {
this.argv = ["js"];
this.env = {};
this.exit = (code) => {
if (code !== 0) {
console.warn("exit code:", code);
}
};
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);
}
const setInt32 = (addr, v) => {
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 loadValue = (addr) => {
const f = this.mem.getFloat64(addr, true);
if (f === 0) {
return undefined;
}
if (!isNaN(f)) {
return f;
}
const id = this.mem.getUint32(addr, true);
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
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.setFloat64(addr, v, true);
return;
}
if (v === undefined) {
this.mem.setFloat64(addr, 0, true);
return;
}
let id = this._ids.get(v);
if (id === undefined) {
id = this._idPool.pop();
if (id === undefined) {
id = this._values.length;
}
this._values[id] = v;
this._goRefCounts[id] = 0;
this._ids.set(v, id);
}
this._goRefCounts[id]++;
let typeFlag = 0;
switch (typeof v) {
case "object":
if (v !== null) {
typeFlag = 1;
}
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);
}
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);
for (let i = 0; i < len; i++) {
a[i] = loadValue(array + i * 8);
}
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 testCallExport = (a, b) => {
this._inst.exports.testExport0();
return this._inst.exports.testExport(a, b);
}
const timeOrigin = Date.now() - performance.now();
this.importObject = {
_gotest: {
add: (a, b) => a + b,
callExport: testCallExport,
},
gojs: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
// 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);
},
// 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));
},
// func resetMemoryDataView()
"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);
},
// 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);
},
// func scheduleTimeoutEvent(delay int64) int32
"runtime.scheduleTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this._nextCallbackTimeoutID;
this._nextCallbackTimeoutID++;
this._scheduledTimeouts.set(id, setTimeout(
() => {
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();
}
},
getInt64(sp + 8),
));
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);
},
// func getRandomData(r []byte)
"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]--;
if (this._goRefCounts[id] === 0) {
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));
},
// 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);
},
// 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));
},
// func valueDelete(v ref, p string)
"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)));
},
// valueSetIndex(v ref, i int, x ref)
"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;
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);
} catch (err) {
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;
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);
} catch (err) {
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;
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);
} catch (err) {
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));
},
// 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);
},
// valueLoadString(v ref, b []byte)
"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);
},
// 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;
}
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;
}
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);
},
}
};
}
async run(instance) {
if (!(instance instanceof WebAssembly.Instance)) {
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
NaN,
0,
null,
true,
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
[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
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
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;
if (offset % 8 !== 0) {
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;
});
// 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;
if (offset >= wasmMinDataAddr) {
throw new Error("total length of command line and environment variables exceeds limit");
}
this._inst.exports.run(argc, argv);
if (this.exited) {
this._resolveExitPromise();
}
await this._exitPromise;
}
_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;
};
}
}
})();