RFR(XS): 8169766: c1 + Xcomp reresolving call target every invocation
nils.eliasson at oracle.com
Mon Aug 7 14:16:40 UTC 2017
Please review this patch.
In bug https://bugs.openjdk.java.net/browse/JDK-8160543 I changed the
behaviour for some calls in c1 generated code to make it comply with the
VM-spec - LinkageError must be thrown before NPE.
One detail was missed in that fix: Some calls, that was static bound and
became optimized virtual calls, now became vanilla virtual calls. The
virtual calls use the unverified entry, but for the static_bound calls
the reciever_klass was not set making the receiver check fail on every
This scenario is only common with Xcomp when methods are compiled that
have call targets that have not been run earlier. Also a c1 thing, c2
uses uncommontraps for this case.
More information about the hotspot-compiler-dev