8232592: <Unknown compiled code> is shown in jstack mixed mode

[Hohensee, Paul]

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-bounces at openjdk.java.net on behalf of suenaga at 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