Splitting out reports for crashes in parallel gc in JDK-8245025 which seem unrelated.

Original report from [~dcubed]:

I'm seeing a couple of test failures in an Adhoc test job for 8153224. These are
assertion failures in MoveAndUpdateClosure::do_addr() so this bug caught my eye.

Spotted in dcubed-8153224_mach5_for_jdk15-20200520-1350-11202231:

vmTestbase/vm/gc/concurrent/lp60yp0rp30mr0st300/TestDescription.java

Here's a snippet from the log file:

To re-run test with same seed value please add "-Djdk.test.lib.random.seed=716186983589641768" to command line.
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/psParallelCompact.cpp:3271
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error ([...]/workspace/open/src/hotspot/share/gc/parallel/psParallelCompact.cpp:3271), pid=32688, tid=32706
# assert(PSParallelCompact::summary_data().calc_new_pointer(source(), compaction_manager()) == destination()) failed: wrong destination
#
# JRE version: Java(TM) SE Runtime Environment (15.0) (fastdebug build 15-internal+0-2020-05-20-0119158.daniel.daugherty.8153224mach5forjdk15)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 15-internal+0-2020-05-20-0119158.daniel.daugherty.8153224mach5forjdk15, mixed mode, sharing, tiered, compressed oops, parallel gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x1470371] MoveAndUpdateClosure::do_addr(HeapWordImpl**, unsigned long)+0x181
#
#
#[...]
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
----------System.err:(0/0)----------

Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x00007f0af0001000): GCTaskThread "GC Thread#1" [stack: 0x00007f0af4f09000,0x00007f0af5009000] [id=32706]

Stack: [0x00007f0af4f09000,0x00007f0af5009000], sp=0x00007f0af5007b20, 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+0x1470371] MoveAndUpdateClosure::do_addr(HeapWordImpl**, unsigned long)+0x181
V [libjvm.so+0x13dd996] ParMarkBitMap::iterate(ParMarkBitMapClosure*, unsigned long, unsigned long) const+0xf6
V [libjvm.so+0x147472e] PSParallelCompact::fill_region(ParCompactionManager*, MoveAndUpdateClosure&, unsigned long)+0x2ae
V [libjvm.so+0x1474d6d] PSParallelCompact::fill_and_update_shadow_region(ParCompactionManager*, unsigned long)+0x15d
V [libjvm.so+0x147c98a] UpdateDensePrefixAndCompactionTask::work(unsigned int)+0x77a
V [libjvm.so+0x17ecdf4] GangWorker::run_task(WorkData)+0x84
V [libjvm.so+0x17ecf1e] GangWorker::loop()+0x2e
V [libjvm.so+0x16abe70] Thread::call_run()+0x100
V [libjvm.so+0x13b0f76] thread_native_entry(Thread*)+0x116


vmTestbase/vm/gc/concurrent/lp30yp0rp30mr30st0t1/TestDescription.java

Here's a snippet from the log file:

To re-run test with same seed value please add "-Djdk.test.lib.random.seed=-7006371182244205045" to command line.
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/psParallelCompact.cpp:3271
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (.../workspace/open/src/hotspot/share/gc/parallel/psParallelCompact.cpp:3271), pid=29788, tid=29806
# assert(PSParallelCompact::summary_data().calc_new_pointer(source(), compaction_manager()) == destination()) failed: wrong destination
#
# JRE version: Java(TM) SE Runtime Environment (15.0) (fastdebug build 15-internal+0-2020-05-20-0119158.daniel.daugherty.8153224mach5forjdk15)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 15-internal+0-2020-05-20-0119158.daniel.daugherty.8153224mach5forjdk15, mixed mode, sharing, tiered, compressed oops, parallel gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x1470371] MoveAndUpdateClosure::do_addr(HeapWordImpl**, unsigned long)+0x181
#
[...]
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
----------System.err:(0/0)----------

Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x00007f3b68001000): GCTaskThread "GC Thread#1" [stack: 0x00007f3b47bfd000,0x00007f3b47cfd000] [id=29806]

Stack: [0x00007f3b47bfd000,0x00007f3b47cfd000], sp=0x00007f3b47cfbaf0, 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+0x1470371] MoveAndUpdateClosure::do_addr(HeapWordImpl**, unsigned long)+0x181
V [libjvm.so+0x13dd996] ParMarkBitMap::iterate(ParMarkBitMapClosure*, unsigned long, unsigned long) const+0xf6
V [libjvm.so+0x147472e] PSParallelCompact::fill_region(ParCompactionManager*, MoveAndUpdateClosure&, unsigned long)+0x2ae
V [libjvm.so+0x1474ac3] PSParallelCompact::fill_and_update_region(ParCompactionManager*, unsigned long)+0x113
V [libjvm.so+0x1456adb] ParCompactionManager::drain_region_stacks()+0x1eb
V [libjvm.so+0x147c992] UpdateDensePrefixAndCompactionTask::work(unsigned int)+0x782
V [libjvm.so+0x17ecdf4] GangWorker::run_task(WorkData)+0x84
V [libjvm.so+0x17ecf1e] GangWorker::loop()+0x2e
V [libjvm.so+0x16abe70] Thread::call_run()+0x100
V [libjvm.so+0x13b0f76] thread_native_entry(Thread*)+0x116