IBM Support

IV71718: JAVA JIT- SIGSEGV OR NULLPOINTEREXCEPTION

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APAR status

  • Closed as program error.

Error description

  • Error Message: SIGSEGV from Java when running with -Xrs. When
    running without -Xrs on a x86 platform the SIGSEGV would be
    interpreted by the JVM as a NullPointerException. Other
    platforms like Power and zSeries would show a SIGSEGV when
    running without -Xrs.
    .
    Stack Trace: N/A
    .
    The problem has only ever been observed with Java 7.1 but we
    believe that the problem is possible in other releases. It could
    be that the problem is less likely to occur in other Java
    releases.
    

Local fix

  • -Xjit:disableTreeSimplificationIf the above option does not
    avoid the problem then this APAR does not apply to your
    problem.The use of this option may have a small impact on
    performance but it's unlikely to be more then 1%.
    

Problem summary

  • The JIT would set a flag stating that a value is non-negative
    when in fact a negative value is possible.
    

Problem conclusion

  • The JIT was modified so that the non-negative flag is cleared
    when the possibility of a negative value exists.
    .
    This APAR will be fixed in the following Java Releases:
       7 R1 SR3       (7.1.3.0)
       6    SR16 FP4  (6.0.16.4)
       7    SR9       (7.0.9.0)
       8    SR1       (8.0.1.0)
       6 R1 SR8 FP4   (6.1.8.4)
    .
    Contact your IBM Product's Service Team for these Service
    Refreshes and Fix Packs.
    For those running stand-alone, information about the available
    Service Refreshes and Fix Packs can be found at:
               https://www.ibm.com/developerworks/java/jdk/
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV71718

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    130

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-03-31

  • Closed date

    2015-04-14

  • Last modified date

    2015-04-14

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

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

    IV71719

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R130 PSY

       UP

  • R600 PSY

       UP

  • R260 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version: 130

Reference #: IV71718

Modified date: 14 April 2015