Bug 221932 – Reduce explicit usage of [objC autorelease] in WebKit

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[Chris Dumez]

Reduce explicit usage of [objC autorelease] in WebKit by using RetainPtr<>.

[Chris Dumez]

Created attachment 420390 [details]
Patch

[Chris Dumez]

Created attachment 420404 [details]
Patch

[Chris Dumez]

Created attachment 420513 [details]
Patch

[EWS Watchlist]

This patch modifies the inspector protocol generator. Please ensure that you have rebaselined any generator test results (i.e., by running `Tools/Scripts/run-inspector-generator-tests --reset-results`)

[Geoffrey Garen]

Comment on attachment 420513 [details]
Patch

r=me -- note the style bot comment about test results

[Chris Dumez]

Created attachment 420530 [details]
Patch

[EWS]

Committed r272936: <https://commits.webkit.org/r272936>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 420530 [details].

[Radar WebKit Bug Importer]

<rdar://problem/74410900>

[Darin Adler]

Comment on attachment 420530 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=420530&action=review

Looking back at this to see where we have opportunity to use a little less autorelease.

> Source/JavaScriptCore/API/JSContext.mm:71
> +    return [self initWithVirtualMachine:adoptNS([[JSVirtualMachine alloc] init]).autorelease()];

get()

> Source/JavaScriptCore/API/JSWrapperMap.mm:638
> +    return m_classMap.get()[(id)cls] = adoptNS([[JSObjCClassInfo alloc] initForClass:cls]).autorelease();

get()

> Source/JavaScriptCore/inspector/scripts/codegen/objc_generator.py:408
> +            return 'adoptNS([[%s alloc] initWithJSONObject:%s]).autorelease()' % (objc_class, var_name)

This should be changed to use RetainPtr instead of autorelease.

> Source/WebCore/accessibility/ios/WebAccessibilityObjectWrapperIOS.mm:2550
> +            object = adoptNS([[NSMutableAttributedString alloc] initWithString:[NSString stringWithCharacters:&attachmentChar length:1] attributes:@{ UIAccessibilityTokenAttachment : object }]).autorelease();

Seems like we could use RetainPtr instead of autorelease here.

> Source/WebCore/editing/cocoa/WebContentReaderCocoa.mm:131
> +        @"WebResourceHandler": adoptNS([WebArchiveResourceWebResourceHandler new]).autorelease(),

get()

> Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm:923
> +            resourceLoader.URLSession = (NSURLSession *)adoptNS([[WebCoreNSURLSession alloc] initWithResourceLoader:*mediaResourceLoader delegate:resourceLoader.URLSessionDataDelegate delegateQueue:resourceLoader.URLSessionDataDelegateQueue]).autorelease();

get()

> Source/WebCore/platform/ios/WebAVPlayerController.mm:72
> +    self.playerControllerProxy = adoptNS([allocAVPlayerControllerInstance() init]).autorelease();

get()

> Source/WebCore/platform/ios/wak/WAKView.mm:241
> +    [adoptNS([subviewReferences copy]).autorelease() makeObjectsPerformSelector:@selector(removeFromSuperview)];

get()

> Source/WebCore/platform/network/cocoa/WebCoreNSURLSession.mm:666
> +        request = mutableRequest.autorelease();

I think we can use a local RetainPtr instead.

> Source/WebCore/platform/network/mac/ResourceHandleMac.mm:176
> +        nsRequest = copyRequestWithStorageSession(d->m_storageSession.get(), nsRequest).autorelease();

I think we can use a local RetainPtr instead.

> Source/WebCore/platform/network/mac/ResourceHandleMac.mm:183
> +    NSMutableDictionary *streamProperties = streamPropertiesFromClient ? adoptNS([streamPropertiesFromClient mutableCopy]).autorelease() : [NSMutableDictionary dictionary];

I think we can use RetainPtr instead.

> Source/WebKit/UIProcess/API/Cocoa/NSAttributedString.mm:313
> +                finish(retainPtr(attributedString).autorelease(), retainPtr(documentAttributes).autorelease(), nil);

I don’t think we need retain/autorelease here at all.

> Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm:1219
> +        completionHandler(adoptNS([[WKFindResult alloc] _initWithMatchFound:NO]).autorelease());

get()

> Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm:1224
> +        handler(adoptNS([[WKFindResult alloc] _initWithMatchFound:found]).autorelease());

get()

> Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm:1713
> +        completionHandler(node.autorelease());

I don’t think we need retain/autorelease at all here.

> Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm:2580
> +            handler(retainPtr(attributedString.string.get()).autorelease(), retainPtr(attributedString.documentAttributes.get()).autorelease(), nil);

I don’t think we need retain/autorelease here at all.

> Source/WebKit/UIProcess/API/Cocoa/_WKAutomationSession.mm:44
> +    return [self initWithConfiguration:adoptNS([[_WKAutomationSessionConfiguration alloc] init]).autorelease()];

get()

> Source/WebKit/UIProcess/API/Cocoa/_WKInspector.mm:191
> +        capturedBlock(nil, retainPtr(wrapper(API::InspectorExtension::create(protectedExtensionID.get(), protectedSelf->_inspector->extensionController()))).autorelease());

I don’t think we need retain/autorelease at all here.

> Source/WebKit/UIProcess/API/Cocoa/_WKRemoteWebInspectorViewController.mm:171
> +        capturedBlock(nil, retainPtr(wrapper(API::InspectorExtension::create(protectedExtensionID.get(), protectedSelf->m_remoteInspectorProxy->extensionController()))).autorelease());

I don’t think we need retain/autorelease at all here.

> Source/WebKit/UIProcess/API/Cocoa/_WKUserContentExtensionStore.mm:75
> +        completionHandler(contentFilter.autorelease(), toUserContentRuleListStoreError(error));

get()

> Source/WebKit/UIProcess/API/Cocoa/_WKUserContentExtensionStore.mm:83
> +        completionHandler(contentFilter.autorelease(), toUserContentRuleListStoreError(error));

get()

> Source/WebKit/UIProcess/Automation/ios/WebAutomationSessionIOS.mm:135
> +        [eventsToBeSent addObject:adoptNS([[::WebEvent alloc] initWithKeyEventType:WebEventKeyDown timeStamp:CFAbsoluteTimeGetCurrent() characters:characters charactersIgnoringModifiers:unmodifiedCharacters modifiers:m_currentModifiers isRepeating:NO withFlags:inputFlags withInputManagerHint:nil keyCode:keyCode isTabKey:isTabKey]).autorelease()];

get()

> Source/WebKit/UIProcess/Automation/ios/WebAutomationSessionIOS.mm:141
> +        [eventsToBeSent addObject:adoptNS([[::WebEvent alloc] initWithKeyEventType:WebEventKeyUp timeStamp:CFAbsoluteTimeGetCurrent() characters:characters charactersIgnoringModifiers:unmodifiedCharacters modifiers:m_currentModifiers isRepeating:NO withFlags:inputFlags withInputManagerHint:nil keyCode:keyCode isTabKey:isTabKey]).autorelease()];

get()

> Source/WebKit/UIProcess/Automation/ios/WebAutomationSessionIOS.mm:146
> +        [eventsToBeSent addObject:adoptNS([[::WebEvent alloc] initWithKeyEventType:WebEventKeyDown timeStamp:CFAbsoluteTimeGetCurrent() characters:characters charactersIgnoringModifiers:unmodifiedCharacters modifiers:m_currentModifiers isRepeating:NO withFlags:inputFlags withInputManagerHint:nil keyCode:keyCode isTabKey:isTabKey]).autorelease()];

get()

> Source/WebKit/UIProcess/Automation/ios/WebAutomationSessionIOS.mm:147
> +        [eventsToBeSent addObject:adoptNS([[::WebEvent alloc] initWithKeyEventType:WebEventKeyUp timeStamp:CFAbsoluteTimeGetCurrent() characters:characters charactersIgnoringModifiers:unmodifiedCharacters modifiers:m_currentModifiers isRepeating:NO withFlags:inputFlags withInputManagerHint:nil keyCode:keyCode isTabKey:isTabKey]).autorelease()];

get()

> Source/WebKit/UIProcess/Cocoa/WKContactPicker.mm:294
> +        [contacts addObject:contact.autorelease()];

get()

[Chris Dumez]

Reopening to attach new patch.

[Chris Dumez]

Created attachment 420872 [details]
Follow-up

[Chris Dumez]

Created attachment 420874 [details]
Follow up

[EWS]

Committed r273128: <https://commits.webkit.org/r273128>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 420874 [details].