Re: 8232592: is shown in jstack mixed mode

[Yasumasa Suenaga]

Hi Paul,

After this change, we can see JNI call as below:

```
"process reaper" #14 daemon prio=10 tid=0x00007f12ec4b6000 nid=0x56a3 runnable 
[0x00007f12d009c000]
   java.lang.Thread.State: RUNNABLE
   JavaThread state: _thread_in_native
0x00007f12f43f5596      __waitpid + 0x56
0x00007f12dc5c134d      java.lang.ProcessHandleImpl.waitForProcessExit0(long, 
boolean) + 0xed (Native method)
0x00007f12d579730c      * java.lang.ProcessHandleImpl$1.run() bci:8 line:138 
(Compiled frame)
```


Thanks,

Yasumasa


On 2019/10/19 1:59, Hohensee, Paul wrote:

What is the output with your patch?

Thanks,

Paul

On 10/18/19, 1:38 AM, "serviceability-dev on behalf of Yasumasa Suenaga" 
<serviceability-dev-boun...@openjdk.java.net on behalf of suen...@oss.nttdata.com> wrote:

     Hi all,

Please review this change. JBS: https://bugs.openjdk.java.net/browse/JDK-8232592

        webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8232592/webrev.00/

I run `jhsdb jstack --mixed` to JShellToolProvider process, then I saw <Unknown compiled code>

     in the stack as below:

```

     "process reaper" #13 daemon prio=10 tid=0x00007f959c328000 nid=0x1285 
runnable [0x00007f9578025000]
         java.lang.Thread.State: RUNNABLE
         JavaThread state: _thread_in_native
     0x00007f95a27c5596 __waitpid + 0x56
     0x00007f958c601d79 <Unknown compiled code>
     0x00007f9585c5b4ac * java.lang.ProcessHandleImpl$1.run() bci:8 line:138 
(Compiled frame)
     ```

0x7f958c601d79 is native method. jstack mixed mode should handle it.

     This patch passed all tests on submit repo 
(mach5-one-ysuenaga-JDK-8232592-20191018-0600-6011163).

Thanks, Yasumasa