Review Request (XS) 8030027: nsk/jvmti/scenarios/hotswap/HS101/hs101t006 Crashed the vm on Linux-amd64: SIGSEGV in JavaThread::last_java_vframe(RegisterMap*)+0xfa

[Markus Gronlund]

Hi Serguei,

Looks good (not a Reviewer).

Thanks
Markus

-----Original Message-----
From: Serguei Spitsyn 
Sent: den 19 december 2013 09:02
To: hotspot-dev developers; serviceability-dev at openjdk.java.net
Subject: Review Request (XS) 8030027: nsk/jvmti/scenarios/hotswap/HS101/hs101t006 Crashed the vm on Linux-amd64: SIGSEGV in JavaThread::last_java_vframe(RegisterMap*)+0xfa

Please, review the fix for:
   https://bugs.openjdk.java.net/browse/JDK-8030027


Open webrev:
http://cr.openjdk.java.net/~sspitsyn/webrevs/2013/hotspot/8030027-JVMTI-HS101.1/

Summary:
   The bug is that the JavaThread::last_java_vframe (called from the
VMOp_GetCurrentLocation)
   crashes on the target thread stack that is non-walkable because the thread is exiting.
   The fix is to check a condition !_thread->is_exiting() in the VMOp_GetCurrentLocation.
   The fix is for JDK 9.

Testing:
   The originally failing test nsk/jvmti/scenarios/hotswap/HS101/hs101t006
   In progress: nsk.jvmti, nsk.jdi, nsk.jdwp


Thanks,
Serguei