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fix: libuv hang on Windows (#28175)

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Shelley Vohr 2021-03-22 20:11:03 +00:00 • committed by GitHub
commit 665ac6f9c8
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7 changed files with 86 additions and 6 deletions
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4
shell/common/node_bindings.cc
View file

@ -534,15 +534,13 @@ void NodeBindings::LoadEnvironment(node::Environment* env) {
void NodeBindings::PrepareMessageLoop() {
#if !defined(OS_WIN)
int handle = uv_backend_fd(uv_loop_);
#else
HANDLE handle = uv_loop_->iocp;
#endif
// If the backend fd hasn't changed, don't proceed.
if (handle == handle_)
return;
handle_ = handle;
#endif
// Add dummy handle for libuv, otherwise libuv would quit when there is
// nothing to do.

4
shell/common/node_bindings.h
View file

@ -159,9 +159,7 @@ class NodeBindings {
// Isolate data used in creating the environment
node::IsolateData* isolate_data_ = nullptr;
#if defined(OS_WIN)
HANDLE handle_;
#else
#if !defined(OS_WIN)
int handle_ = -1;
#endif

13
spec-main/fixtures/apps/libuv-hang/index.html Normal file
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@ -0,0 +1,13 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'">
<meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'">
<title>Hello World!</title>
</head>
<body>
<h1>Hello World!</h1>
<script src="./renderer.js"></script>
</body>
</html>

36
spec-main/fixtures/apps/libuv-hang/main.js Normal file
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@ -0,0 +1,36 @@
const { app, BrowserWindow, ipcMain } = require('electron');
const path = require('path');
async function createWindow () {
const mainWindow = new BrowserWindow({
show: false,
webPreferences: {
preload: path.join(__dirname, 'preload.js')
}
});
await mainWindow.loadFile('index.html');
}
app.whenReady().then(() => {
createWindow();
app.on('activate', function () {
if (BrowserWindow.getAllWindows().length === 0) {
createWindow();
}
});
});
let count = 0;
ipcMain.handle('reload-successful', () => {
if (count === 2) {
app.quit();
} else {
count++;
return count;
}
});
app.on('window-all-closed', function () {
if (process.platform !== 'darwin') app.quit();
});

16
spec-main/fixtures/apps/libuv-hang/preload.js Normal file
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@ -0,0 +1,16 @@
const { contextBridge, ipcRenderer } = require('electron');
contextBridge.exposeInMainWorld('api', {
ipcRenderer,
run: async () => {
const { promises: fs } = require('fs');
for (let i = 0; i < 10; i++) {
const list = await fs.readdir('.', { withFileTypes: true });
for (const file of list) {
if (file.isFile()) {
await fs.readFile(file.name, 'utf-8');
}
}
}
}
});

8
spec-main/fixtures/apps/libuv-hang/renderer.js Normal file
View file

@ -0,0 +1,8 @@
const count = localStorage.getItem('count');
const { run, ipcRenderer } = window.api;
run().then(async () => {
const count = await ipcRenderer.invoke('reload-successful');
if (count < 3) location.reload();
}).catch(console.log);

11
spec-main/node-spec.ts
View file

@ -7,6 +7,7 @@ import { ifdescribe, ifit } from './spec-helpers';
import { webContents, WebContents } from 'electron/main';
const features = process._linkedBinding('electron_common_features');
const mainFixturesPath = path.resolve(__dirname, 'fixtures');
describe('node feature', () => {
const fixtures = path.join(__dirname, '..', 'spec', 'fixtures');
@ -22,6 +23,16 @@ describe('node feature', () => {
});
});
it('does not hang when using the fs module in the renderer process', async () => {
const appPath = path.join(mainFixturesPath, 'apps', 'libuv-hang', 'main.js');
const appProcess = childProcess.spawn(process.execPath, [appPath], {
cwd: path.join(mainFixturesPath, 'apps', 'libuv-hang'),
stdio: 'inherit'
});
const [code] = await emittedOnce(appProcess, 'close');
expect(code).to.equal(0);
});
describe('contexts', () => {
describe('setTimeout called under Chromium event loop in browser process', () => {
it('Can be scheduled in time', (done) => {