8234624: jstack mixed mode should refer DWARF

[David Holmes]

On 22/11/2019 5:42 pm, Yasumasa Suenaga wrote:
> Hi all,
> 
> I tried to get mixed stack via `jhsdb jstack --mixed`, but I couldn't.
> (See JBS for details)
> 
>    https://bugs.openjdk.java.net/browse/JDK-8234624
> 
> I think it is caused by DWARF. AMD64 needs DWARF for stack unwinding, 
> but SA does not handle it.
> So I created a patch. It works fine on my Fedora 31 x64 box, but it 
> failed on submit repo.
> 
>    http://hg.openjdk.java.net/jdk/submit/rev/f97745e0af75
> 
> Failed test was linux-x64-debug, and it is due to "gHotSpotVMTypes" was 
> not found.
> I wonder why it failed, and why my serviceability/sa tests (with 
> fastdebug build) was succeeded.
> Can you share details for this test? 
> mach5-one-ysuenaga-JDK-8234624-20191122-0630-6909161

I can't really shed any light on it, there were lots of failures - see 
below for example. The issue is with the VM that was being inspected but 
there's no output from that VM.

David
  -----

----------System.out:(10/413)----------
Starting TestUniverse
Started LingeredApp with G1GC and pid 31111
Starting clhsdb against 31111
[2019-11-22T07:03:42.836056Z] Gathering output for process 31133
[2019-11-22T07:03:44.395452Z] Waiting for completion for process 31133
[2019-11-22T07:03:44.395815Z] Waiting for completion finished for 
process 31133
hsdb> Command not valid until attached to a VM
hsdb>
'Heap Parameters' missing from stdout/stderr

----------System.err:(53/3915)----------
Command line: 
['/opt/mach5/mesos/work_dir/jib-master/install/2019-11-22-0629473.suenaga.source/linux-x64-debug.jdk/jdk-14/fastdebug/bin/java' 
'-XX:+UnlockExperimentalVMOptions' '-XX:+UseG1GC' '-cp' 
'/opt/mach5/mesos/work_dir/slaves/6e54f4af-e606-43b0-80ce-0a482a5988b6-S156/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/0454c404-a309-4896-bf31-90b9636056fa/runs/eed41e19-a725-491b-9ddd-c380024cedc9/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/classes/2/serviceability/sa/TestUniverse.d:/opt/mach5/mesos/work_dir/slaves/6e54f4af-e606-43b0-80ce-0a482a5988b6-S156/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/0454c404-a309-4896-bf31-90b9636056fa/runs/eed41e19-a725-491b-9ddd-c380024cedc9/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/classes/2/test/lib' 
'jdk.test.lib.apps.LingeredApp' '918bf6a8-d3df-4fd1-bdca-13fc399c67f3.lck' ]
Attaching to process 31111, please wait...
Unable to connect to process ID 31111:

Doesn't appear to be a HotSpot VM (could not find symbol 
"gHotSpotVMTypes" in
remote process)
sun.jvm.hotspot.debugger.DebuggerException: Doesn't appear to be a 
HotSpot VM (could not find symbol "gHotSpotVMTypes" in remote process)
	at 
jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:413)
	at jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:306)
	at 
jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:141)
	at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.attachDebugger(CLHSDB.java:180)
	at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.run(CLHSDB.java:61)
	at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.main(CLHSDB.java:40)
	at 
jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runCLHSDB(SALauncher.java:270)
	at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:406)
  stdout: [ Command not valid until attached to a VM
];
  stderr: [ Command not valid until attached to a VM
]
  exitValue = -1

  LingeredApp stdout: [];
  LingeredApp stderr: []
  LingeredApp exitValue = 0
java.lang.RuntimeException: 'Heap Parameters' missing from stdout/stderr