IBM Support

IV97537: INVALID CODE GENERATED WHEN PERFORMING UNSAFE.COPYMEMORY

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APAR status

  • Closed as program error.

Error description

  • Error Message: A crash in JIT library.
    .
    Stack Trace: N/A
    .
    This problem only occurs on X86 systems.
    

Local fix

Problem summary

  • The JIT compiler may optimize calls to Unsafe.copyMemory. In
    some cases the JIT compiler may not pass the parameters to the
    method in the correct order which results in the incorrect
    values being used for the memory copying, causing a crash.
    

Problem conclusion

  • The JIT compiler has been updated to parse the arguments in the
    correct order.
    .
    This APAR will be fixed in the following Java Releases:
       6 R1 SR8 FP50  (6.1.8.50)
       7    SR10 FP10 (7.0.10.10)
       8    SR4 FP10  (8.0.4.10)
       7 R1 SR4 FP10  (7.1.4.10)
    .
    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

    IV97537

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-06-27

  • Closed date

    2017-07-11

  • Last modified date

    2018-01-30

  • 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



Document information

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

Software version: 260

Reference #: IV97537

Modified date: 30 January 2018