7127687: MethodType leaks memory due to interning

[John Rose]

Thanks, Jim. 

-- John  (on my iPhone T-1000)

On Mar 28, 2012, at 6:01 PM, Jim Laskey <jlaskey at me.com> wrote:

> The WeakHashMap leads to a non-weak reference to the class, since only the key is weak. Same is true for public versions of WeakHashSet. The collection used here is truly weak. 
> 
> Sent from my iPhone 4
> 
> On 2012-03-28, at 9:42 PM, Vitaly Davidovich <vitalyd at gmail.com> wrote:
> 
>> Hi John,
>> 
>> I think you can use diamond generic inference when declaring the weak intern set.
>> 
>> Also any reason you didn't use WeakHashMap directly with dummy value to simulate the set? Or wrap the WeakHashMap and synchronize the accessors to it?
>> 
>> Sent from my phone
>> 
>> On Mar 28, 2012 7:52 PM, "John Rose" <john.r.rose at oracle.com> wrote:
>> http://cr.openjdk.java.net/~jrose/7127687/webrev.00/
>> 
>> 7127687: MethodType leaks memory due to interning
>> Summary: Replace internTable with a weak-reference version.
>> 
>> This is a point fix for JDK 8, and will (pending approval) also be back-ported to JDK 7u.
>> 
>> — John
>> 
>> Notes on process:  This code is part of JSR 292.  Therefore the review comments will be collected in mlvm-dev, and changes will be integrated via hsx/hotspot-comp.
>> 
>> At least one reviewer must be an official Reviewer the JDK 8 Project [1], but other reviewers are most welcome.
>> 
>> [1] http://openjdk.java.net/census#jdk8
>> 
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