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Merge pull request #8110 from electron/track-render-view-by-process-id

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Don't clear until render view is deleted for process id
This commit is contained in:
Kevin Sawicki 2016-12-02 13:40:20 -08:00 committed by GitHub
commit c27633dff4
3 changed files with 63 additions and 7 deletions
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23
lib/browser/objects-registry.js
View file

@ -19,17 +19,14 @@ class ObjectsRegistry {
// registered then the already assigned ID would be returned.
add (webContents, obj) {
// Get or assign an ID to the object.
let id = this.saveToStorage(obj)
const id = this.saveToStorage(obj)
// Add object to the set of referenced objects.
let webContentsId = webContents.getId()
const webContentsId = webContents.getId()
let owner = this.owners[webContentsId]
if (!owner) {
owner = this.owners[webContentsId] = new Set()
// Clear the storage when webContents is reloaded/navigated.
webContents.once('render-view-deleted', () => {
this.clear(webContentsId)
})
this.registerDeleteListener(webContents, webContentsId)
}
if (!owner.has(id)) {
owner.add(id)
@ -90,9 +87,21 @@ class ObjectsRegistry {
pointer.count -= 1
if (pointer.count === 0) {
v8Util.deleteHiddenValue(pointer.object, 'atomId')
return delete this.storage[id]
delete this.storage[id]
}
}
// Private: Clear the storage when webContents is reloaded/navigated.
registerDeleteListener (webContents, webContentsId) {
const processId = webContents.getProcessId()
const listener = (event, deletedProcessId) => {
if (deletedProcessId === processId) {
webContents.removeListener('render-view-deleted', listener)
this.clear(webContentsId)
}
}
webContents.on('render-view-deleted', listener)
}
}
module.exports = new ObjectsRegistry()

15
spec/api-ipc-spec.js
View file

@ -517,4 +517,19 @@ describe('ipc module', function () {
ipcRenderer.removeAllListeners('test-event')
assert.equal(ipcRenderer.listenerCount('test-event'), 0)
})
describe('remote objects registry', function () {
it('does not dereference until the render view is deleted (regression)', function (done) {
w = new BrowserWindow({
show: true
})
ipcMain.once('error-message', (event, message) => {
assert(message.startsWith('Cannot call function \'getURL\' on missing remote object'), message)
done()
})
w.loadURL('file://' + path.join(fixtures, 'api', 'render-view-deleted.html'))
})
})
})

32
spec/fixtures/api/render-view-deleted.html vendored Normal file
View file

@ -0,0 +1,32 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script>
const {ipcRenderer, remote} = require('electron')
const contents = remote.getCurrentWebContents()
// This should not trigger a dereference and a remote getURL call should not fail
contents.emit('render-view-deleted', {}, 'not-a-process-id')
try {
contents.getURL()
} catch (error) {
ipcRenderer.send('error-message', 'Unexpected error on getURL call')
}
// This should trigger a dereference and a remote getURL call should fail
contents.emit('render-view-deleted', {}, contents.getProcessId())
try {
contents.getURL()
ipcRenderer.send('error-message', 'No error thrown')
} catch (error) {
ipcRenderer.send('error-message', error.message)
}
</script>
</head>
<body>
</body>
</html>