JVM crash in ShenandoahInitMarkRootsClosure

[Omar Kilani]

Hi there,

We're testing:

OpenJDK 64-Bit Server VM
(12-testing+0-builds.shipilev.net-openjdk-jdk12-b140-20190320-jdk-1233)

And had a crash in one of our applications:

---------------  T H R E A D  ---------------
Current thread (0x00007febe8156000):  GCTaskThread "Shenandoah GC
Threads#5" [stack: 0x00007febec68a000,0x00007febec78a000] [id=2927]
Stack: [0x00007febec68a000,0x00007febec78a000],
sp=0x00007febec788ae0,  free space=1018k

Native frames: (J=compiled Java code, A=aot compiled Java code,
j=interpreted, Vv=VM code, C=native code)

V  [libjvm.so+0xd24b2d]
ShenandoahInitMarkRootsClosure<(UpdateRefsMode)0,
(StringDedupMode)1>::do_oop(oopDesc**)+0x7d
V  [libjvm.so+0xd7c6c6]
ShenandoahStrDedupQueue::unlink_or_oops_do_impl(StringDedupUnlinkOrOopsDoClosure*,
unsigned long)+0x96
V  [libjvm.so+0xe09aa3]
StringDedupQueue::unlink_or_oops_do(StringDedupUnlinkOrOopsDoClosure*)+0x43
V  [libjvm.so+0xd7d3e8]
ShenandoahStringDedup::parallel_oops_do(OopClosure*, unsigned
int)+0x58
V  [libjvm.so+0xd7b4f1]
ShenandoahRootProcessor::process_vm_roots(OopClosure*, OopClosure*,
OopClosure*, unsigned int)+0x111
V  [libjvm.so+0xd7b87a]
ShenandoahRootProcessor::process_all_roots(OopClosure*, OopClosure*,
CLDClosure*, CodeBlobClosure*, ThreadClosure*, unsigned int)+0x7a
V  [libjvm.so+0xd19000]
ShenandoahInitMarkRootsTask<(UpdateRefsMode)0>::work(unsigned
int)+0x200
V  [libjvm.so+0xf565bd]  GangWorker::loop()+0x4d
V  [libjvm.so+0xec2b35]  Thread::call_run()+0x75
V  [libjvm.so+0xc000ce]  thread_native_entry(Thread*)+0xee

siginfo: si_signo: 11 (SIGSEGV), si_code: 128 (SI_KERNEL), si_addr:
0x0000000000000000

--

Is this fixed by:

https://bugs.openjdk.java.net/browse/JDK-8221278

? :)

Thanks!

Regards,
Omar