XPCOMGC: Difference between revisions

Revision as of 21:17, 4 October 2007

XPCOMGC is the Mozilla 2 project to convert the XPCOM object model from reference counting to use MMgc garbage collection.

TODO: collect/format information from the newsgroup discussion.

Add the request model threadsafety to MMgc
Give MMgc the ability to recognize "inner" pointers to objects as typically used by C++ multiple inheritance bug 388070
Make the world depend on a common MMgc
Rewrite XPCOM addref/release handling
- Remove the cycle collector
- Use textual search/replace to remove most calls to NS_ADDREF/NS_RELEASE
- Use automatic finding to identify remaining references for manual cleanup
- Make all COM objects inherit from GCObject
- Rewrite nsCOMPtr+friends to be a lightweight wrapper for GC writebarriers
- Make stack pointers raw pointers
- Fix some COM-holding utility classes:
  - nsCOMArray
  - hashtables: nsInterfaceHashtable and nsInterfaceHashKey
- Rewrite XPCOM weakrefs to be GCWeakRefs
  - And remove those that can be regular GC references
Identify and deal with multi-threading, especially
- Initialize and suspend requests around blocking activity
- Analyze code for deadlock possibilities.

@@ Line 15: / Line 15: @@
 ** Use automatic finding to identify remaining references for manual cleanup
 ** [[XPCOMGC/GCObject Inheritance|Make all COM objects inherit from GCObject]]
-** Rewrite nsCOMPtr+friends to be a lightweight wrapper for GC writebarriers.
+** [[XPCOMGC/nsCOMPtr rewrite|Rewrite nsCOMPtr+friends to be a lightweight wrapper for GC writebarriers]]
 ** [[XPCOMGC/Stack Pointers|Make stack pointers raw pointers]]
 ** Fix some COM-holding utility classes: