hg: jdk/jdk11: 8205608: Fix 'frames()' in ThreadReferenceImpl.c to prevent quadratic runtime behavior

[volker.simonis at gmail.com]

Changeset: 21ce0a9e592a
Author:    simonis
Date:      2018-07-23 15:17 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk11/rev/21ce0a9e592a

8205608: Fix 'frames()' in ThreadReferenceImpl.c to prevent quadratic runtime behavior
Reviewed-by: sspitsyn, cjplummer

! src/jdk.jdwp.agent/share/native/libjdwp/ThreadReferenceImpl.c
+ test/jdk/com/sun/jdi/Frames2Test.java