Bug 124053 – JSManagedValue should automatically call removeManagedReference:withOwner: upon dealloc

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Mark Hahnenberg]

This would make managing JSManagedValue lifetime much easier.

[Mark Hahnenberg]

Created attachment 216414 [details]
Patch

[Mark Hahnenberg]

(In reply to comment #1)
> Created an attachment (id=216414) [details]
> Patch

Still needs API approval and availability macros.

[Mark Hahnenberg]

<rdar://problem/15409543>

[Oliver Hunt]

Comment on attachment 216414 [details]
Patch

What will this do to clients that already do the work to avoid the leak? Are they all using the existing api?

[Geoffrey Garen]

Comment on attachment 216414 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=216414&action=review

r=me, pending those things.

> Source/JavaScriptCore/API/JSManagedValue.h:58
> ++ (JSManagedValue *)managedValueWithValue:(JSValue *)value andOwner:(id)owner;

It looks like the canonical ObjC API idiom is to leave off "and". For example, -[NSString – initWithBytes:length:encoding:].

[Mark Hahnenberg]

(In reply to comment #4)
> (From update of attachment 216414 [details])
> What will this do to clients that already do the work to avoid the leak? Are they all using the existing api?

It will work correctly. Calling -removeManagedReference:withOwner: will remove the owner from the JSManagedValue's m_owners so when it is dealloc-ed it won't be called again.

[Mark Rowe (bdash)]

Can you post a new patch with availability macros added?

[Mark Hahnenberg]

(In reply to comment #7)
> Can you post a new patch with availability macros added?

I'm still not sure what macros to use. NS_AVAILABLE and friends will break the open source bots. Should I add a new WebKit availability macro for the current WebKit version using the new versioning scheme (e.g. 0x2100500 == 528.5.0) in JavaScriptCore/API/WebKitAvailability.h?

[Mark Hahnenberg]

Created attachment 223353 [details]
Patch

[WebKit Commit Bot]

Attachment 223353 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:37:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:41:  Missing spaces around =  [whitespace/operators] [4]
Total errors found: 2 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Mark Hahnenberg]

Created attachment 223356 [details]
Patch

[WebKit Commit Bot]

Attachment 223356 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:38:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:42:  Missing spaces around =  [whitespace/operators] [4]
Total errors found: 2 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Mark Hahnenberg]

Created attachment 223368 [details]
Patch

[WebKit Commit Bot]

Attachment 223368 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:49:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:53:  Missing spaces around =  [whitespace/operators] [4]
Total errors found: 2 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Mark Hahnenberg]

Created attachment 223373 [details]
Patch

[WebKit Commit Bot]

Attachment 223373 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:49:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:53:  Missing spaces around =  [whitespace/operators] [4]
Total errors found: 2 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Mark Hahnenberg]

Created attachment 223382 [details]
Patch

[WebKit Commit Bot]

Attachment 223382 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:49:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:53:  Missing spaces around =  [whitespace/operators] [4]
Total errors found: 2 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Mark Hahnenberg]

Created attachment 223384 [details]
Patch

[WebKit Commit Bot]

Attachment 223384 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:49:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/WebKitAvailability.h:53:  Missing spaces around =  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/API/JSManagedValue.h:74:  Missing space after ,  [whitespace/comma] [3]
ERROR: Source/JavaScriptCore/API/JSManagedValue.h:76:  Missing space after ,  [whitespace/comma] [3]
Total errors found: 4 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Geoffrey Garen]

Comment on attachment 223384 [details]
Patch

r=me

[WebKit Commit Bot]

Comment on attachment 223384 [details]
Patch

Clearing flags on attachment: 223384

Committed r163574: <http://trac.webkit.org/changeset/163574>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.