On 04/25/2015 12:24 AM, Peter Levart wrote:
On 04/24/2015 11:06 PM, John Rose wrote:
Good point. Are you seeing a leak in practice?
The cache is important, especially to inexact MH.invoke.
— John
Well, yes. I am (re)implementing annotations (proxies) using Remi's
Proxy2 and made it all the way except for the following failing jtreg
test:
jdk/test/java/lang/annotation/loaderLeak/Main.java
...which made me find this issue. What I'm doing is the following:
For implementing some annotation @Ann proxy's hashCode() method for
example, I prepare DMHs with the following signature (T)int for Ts
being all primitives, primitive arrays, Object[] and Object. I cache
them in a system class static field referenced HashMap keyed by
Class<T>. These are the functions that take an annotation member value
and map it to it's hashCode. When the value is of some Object (or
Object[] in case it is an array) subtype - for example when the member
value is an annotation of type V, I take the (Object)int DMH and
transform it with .asType(methodType(int.class, V.class)) to get
(V)int, which is necessary to further wrap it with filterArguments
where the filter is a member field getter of type (Ann)V so that I get
(Ann)int MHs as a kind of hashCodeExtractors for all annotation
members (I'll present the details later)...
I'm curious to see your implementation.
rgds,
Rémi
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