IV13764: CRASH IN THE JIT COMPILER WHILE COMPILING A METHOD

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: Unhandled exception with a vmstate=0x5ff06
    .
    Stack Trace: TR_SetMonitorStateOnBlockEntry::set
    TR_CodeGenerator::doInstructionSelection
    TR_CodeGenerator::generateCodePhase1???????????
    TR_CodeGenrattor::generateCode
    .
    

Local fix

  • N/A. There is no known workaround for the problem at this time
    because the code paths in the compiler need to run and cannot be
    disabled.
    

Problem summary

  • The problem is related to the way the compiler propagates
    information about locks within the method being compiled. The
    problem is in turn caused by how older Javac (in particular
    1.3.1) generates exception ranges compared to newer Javac (1.4.2
    and above). The older javacs include 'return' bytecode within
    the exception range for synchronized blocks whereas newer javacs
    exclude 'return' bytecodes from the range. This inclusion causes
    problems for the JIT compiler during the identification of live
    locks in the method.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR11
    6.0.1 SR2
    7.0.0 SR1
    .
    The JIT compiler has been updated to workaround the scenario
    when 'return' bytecodes could be included in exception ranges
    and propagate the information about live locks correctly.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV13764

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-01-25

  • Closed date

    2012-02-24

  • Last modified date

    2012-06-01

  • 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

  • R600 PSY

       UP

  • R260 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

6.0

Reference #:

IV13764

Modified date:

2012-06-01

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