IV25380: CRASH IN JIT RUN-TIME LIBRARY IN REPLACETRAMPOLINE

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APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV/GPF is raised by the Java JIT run-time
    library code that manages code caches. This crash only occurs if
    the JVM is running on a 64-bit x86-based processor.
    .
    Stack Trace: TR_MCCCodeCache::replaceTrampoline
    TR_MCCManager::replaceTrampoline
    mcc_replaceTrampoline
    amd64CodePatching
    TR_MCCCodeCache::patchTrampoline
    TR_MCCCodeCache::patchCallPoint
    mcc_callPointPatching_unwrapper
    jitCallCFunction
    mergedStaticGlueCallFixer
    .
    

Local fix

  • N/A
    

Problem summary

  • On x86-64, if a JIT-compiled method calls an interpreted method,
    the JIT compiler generates a special data structure in the
    current code cache. If another code cache becomes current before
    the compilation has completed, the data structure in the
    original current code cache becomes obsolete, and future
    searches for this data structure in the current code cache will
    fail, which will cause the JVM to crash.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR3
    6.0.1 SR4
    5.0.0 SR15
    .
    The JIT compiler has been modified to re-reserve space for a new
    data structure for the interpreter dispatch if it detects that
    the current code cache has been switched.
    

Temporary fix

  • N/A
    

Comments

APAR Information

  • APAR number

    IV25380

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-07-30

  • Closed date

    2012-07-30

  • Last modified date

    2012-07-30

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

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

    IV25382

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R260 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

260

Reference #:

IV25380

Modified date:

2012-07-30

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