On 11/14/2014 05:09 PM, Volker Simonis wrote:
>
>
> On Friday, November 14, 2014, Vladimir Kozlov <[email protected]
> <mailto:[email protected]>> wrote:
>
> Volker or Goetz, can you help Maynard to create bugs and prepare webrevs
> on cr.openjdk for these 3 changes?
>
>
> I will create the bugs and have look at the changes on monday.
>
> Regards,
> Volker
>
>
> Thanks,
> Vladimir
>
> On 11/14/14 10:09 AM, Maynard Johnson wrote:
>
> When Hotspot SA tools jmap, jstack, and jsadebugd are run against a
> core file, they fail with the following runtime exception:
>
> OS/CPU combination linux/ppc64 not yet supported
>
> I will post a patch set that adds this support. The patch set
> consists of the following patches:
>
> PATCH 1/2: Updates to non-Java files to support linux/ppc64 Hotspot
> SA with core files
>
> PATCH 2/2: New PPC64 class files (and updates to generic files) to
> support linux/ppc64 Hotspot SA with core files
>
> These two patches apply cleanly to a November 13 pull of the jdk9-dev
> upstream sources.
>
> ------------
> Open issues:
> ------------
> 1) The jstack tool does not print a stack entry for the 'main()'
> method of the Java
> workload (attached) under test. For example:
>
> (Note: Addresses and method signatures elided for brevity.)
>
> Thread 24358: (state = IN_JAVA, current Java SP = null
> )
> - java.lang.String.getChars(...) @bci=58, line=814, pc=...,
> Method*=... (Compiled frame; ... imprecise)
> - test.run_test() @bci=80, line=33, pc=..., Method*=...
> (Compiled frame)
> ==> (Expect an entry for test.main() here)
>
> 2) The jstack tool sometimes prints what appears to be two
> complete stacks for the Java workload. For example:
>
> Thread 24779: (state = IN_JAVA, current Java SP = null
> )
> - java.lang.String.getChars(...) @bci=58, line=814, pc=...,
> Method*=... (Compiled frame; ... imprecise)
> - test.run_test() @bci=80, line=33, pc=..., Method*=...
> (Compiled frame)
> - test.get_my_chars(...) @bci=39, line=15, pc=...,
> Method*=... (Compiled frame)
> - test.run_test() @bci=92, line=34, pc=..., Method*=...
> (Compiled frame)
>
> Again, the 'test.main' method is missing, but there's also
> the anomaly of the
> test.run_test' method showing up twice in the stack, implying
> that it is called
> by 'test.get_my_chars' at line 15. But that that is not
> accurate. In fact, run_test
> does call String.getChars at line 33 *and* it calls
> test.get_my_chars at line 34 --
> but these are totally distinct call graphs. Somehow, we are
> seeing these two distinct
> stacks in the core file, which seems impossible.
Sorry, I neglected to mention a third issue:
3) The mixed mode option for jstack does not work. Still
investigating.
-Maynard
>
> ---------
>
> Any help offered on these two open issues would be greatly
> appreciated.
>
> -Maynard
>
