On Mon, 18 Jul 2022 03:15:02 GMT, Ioi Lam <ik...@openjdk.org> wrote:
> Since the impact of this bug can be big, and the fix is simple and low risk
> (just avoids doing optimizations), I'd like to put this into JDK 19 before
> RDP2 (Jul 21).
>
> CDS cannot handle Lambda proxy classes that are generated in the
> useImplMethodHandle mode. This could happen with classfiles generated by JDK
> 8 or JDK 11 that access protected methods in a base class from a different
> package. E.g.,
>
>
> class pkg1.Base {
> protected void doit(String s) {
> System.out.println(s);
> }
> }
> class pkg2.Child extends pkg1.Base {
> void test() {
> Optional<String> opt = Optional.of("foo");
> opt.ifPresent(this::doit);
> }
> }
>
>
> More details of useImplMethodHandle can be found here:
> https://github.com/openjdk/jdk/blob/522b65743ca10fcba0a27d25b8fa11319999e228/src/java.base/share/classes/java/lang/invoke/InnerClassLambdaMetafactory.java#L183-L191
>
> More details about the condition that triggers the error can be found in the
> test file Child.jcod.
This pull request has now been integrated.
Changeset: 4dc421ca
Author: Ioi Lam <ik...@openjdk.org>
URL:
https://git.openjdk.org/jdk19/commit/4dc421caa02caedd7061ede6a5ec44dbb6ec738e
Stats: 435 lines in 7 files changed: 433 ins; 0 del; 2 mod
8290417: CDS cannot archive lamda proxy with useImplMethodHandle
Reviewed-by: dholmes, ccheung, mchung
-------------
PR: https://git.openjdk.org/jdk19/pull/146
