IV39798: THROWING A JAVA EXCEPTION CAUSES A CRASH IN LIBJ9VM26.SO ON POWE R

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APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV or GPF is raised in libj9vm26.so on
    POWER platforms (Linux or AIX), when a Java program tries to
    throw an exception.
    .
    Stack Trace:
    java/lang/J9VMInternals.getStackTrace(Native Method)
    java/lang/Throwable.getInternalStackTrace(Throwable.java:208(Com
    piled Code))
    java/lang/Throwable.printStackTrace(Throwable.java:399(Compiled
    Code))
    java/lang/Throwable.printStackTrace(Throwable.java:245(Compiled
    Code))
    
    Native stack trace:
    #12 getOriginalROMMethod
    #13 iterateStackTrace
    #14 getStackTrace
    #15 java_lang_J9VMInternals_getStackTrace
    .
    

Local fix

  • This problem can be avoided with the JVM option -Xnoclassgc but
    this might result in a memory leak if dynamic class loading is
    in use.
    
    The problem can also be avoided by preventing the JIT compiler
    from inlining methods that could be unloaded without the root
    method also being unloaded at the same time. We believe that the
    following option will have that effect with a performance
    penalty of less then 20%:
    
    -Xjit:disableVirtualInlining
    
    A more conservative work-around would be to disable inlining
    entirely:
    
    -Xjit:disableInlining
    

Problem summary

  • The problem is caused by the JIT compiler incorrectly handling
    unloaded methods on POWER platforms.
    

Problem conclusion

  • This defect will be addressed by APAR IV47046 for Java 6, Java
    6.0.1, and Java 7.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV39798

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-04-14

  • Closed date

    2013-04-16

  • Last modified date

    2013-08-26

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

260

Reference #:

IV39798

Modified date:

2013-08-26

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