IV09461: CRASH IN GC DUE TO BAD STACKSLOTS

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APAR status

  • Closed as program error.

Error description

  • Error Message: The problem could occur on system Z only:
    <OSB>java<CSB> 0000000A5A30D700: Invalid class pointer in stack
    allocated object in thread main \
    <OSB>java<CSB> 0000000A5A30D700:   O-Slot=0000000BA0FF9580 \
    <OSB>java<CSB> 0000000A5A30D700:   O-Slot value=0000000BA0FF71B8
    \
    <OSB>java<CSB> 0000000A5A30D700:   PC=000000001ED0874E \
    <OSB>java<CSB> 0000000A5A30D700:   framesWalked=21 \
    <OSB>java<CSB> 0000000A5A30D700:   arg0EA=0000000BA0FF9618 \
    <OSB>java<CSB> 0000000A5A30D700:   walkSP=0000000BA0FF70A0 \
    <OSB>java<CSB> 0000000A5A30D700:   literals=0000000B3CED7268 \
    <OSB>java<CSB> 0000000A5A30D700:   jitInfo=0000000B9ADB7B58 \
    <OSB>java<CSB> 0000000A5A30D700:   method=0000000B3C8D7C78 \
    (com/ibm/icm/da/portable/schema/BuildCompType.buildCompType1(Lco
    m/ibm/icm/da/IBuildCompTypeInput;)Lcom/ibm/icm/da/IBuildCompType
    Output;) (JIT) \
    <OSB>java<CSB> 0000000A5A30D700:
    stack=0000000BA0FF0750-0000000BA0FF9F70 \
    <OSB>java<CSB> 18:19:22.681 0xa5ba1eb00    j9mm.479    *   **
    ASSERTION FAILED ** at ./ParallelScavenger.cpp:2381: \
    ((MM_StackSlotValidator(MM_StackSlotValidator::NOT_ON_HEAP,
    *slotPtr, stackLocation, walkState).validate(_env))) \
    <OSB>java<CSB> JVMDUMP006I Processing dump event 'traceassert',
    detail '' - please wait. \avenger.cpp:2381: \
    .
    Stack Trace: N/A
    .
    

Local fix

  • Excluding this method from being compiled by the JIT:
    for the above example:
    -Xjit:exclude={com/ibm/icm/da/portable/schema/BuildCompType.buil
    dCompType1(Lcom/ibm/icm/da/IBuildCompTypeInput;)Lcom/ibm/icm/da/
    IBuildCompTypeOutput;}
    However this might introduce performance degradation as the
    method will be interpreted.
    

Problem summary

  • The problem is caused by a bad stack slot mapping for long
    displacements
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 SR1
    .
    The JVM has been updated to correctly map the long displacement
    slots
    .
    To obtain the fix:
    Install build 20110602 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV09461

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-10-24

  • Closed date

    2011-10-24

  • Last modified date

    2011-10-24

  • 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

  • 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 #:

IV09461

Modified date:

2011-10-24

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