IZ61955: JAVA 5 JIT CRASHES DURING COMPILATION

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV/GPF is received during the JIT
    compilation of a Java method. The resulting javacore dump
    records the VM flags as 0x0005FF05. The problem is likely to
    appear in an application which makes heavy use of reflection and
    hence causes a lot of class loading and unloading. The problem
    disappears if interpreter profiling is disabled.
    .
    Stack Trace: j9jit23!instanceOfOrCheckCast+0x16
    j9jit23!generateProfiledCacheTest+0x36
    j9jit23!TR_X86TreeEvaluator::VMcheckcastEvaluator+0x353
    j9jit23!TR_CodeGenerator::evaluate+0xca
    j9jit23!TR_CodeGenerator::doInstructionSelection+0x897
    .
    

Local fix

  • This issue can be avoided using the
    -Xjit:disableInterpreterProfiling option.
    

Problem summary

  • The crash occurs when the JIT compiler attempts to use profiled
    data that have become invalid due to class unloading.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR11
    .
    The JIT compiler has been updated to avoid the crash.
    .
    To obtain the fix:
    Install build 20090928 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ61955

  • Reported component name

    JAVA 5 JIT

  • Reported component ID

    620500124

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-09-29

  • Closed date

    2009-09-29

  • Last modified date

    2009-09-29

  • 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

    JAVA 5 JIT

  • Fixed component ID

    620500124

Applicable component levels

  • R500 PSN

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

5.0

Reference #:

IZ61955

Modified date:

2009-09-29

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