IV30271: -XLOCKWORD:MODE=ALL PROBLEM

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APAR status

  • Closed as program error.

Error description

  • Error Message: java/lang/ExceptionInInitializerError
    .
    Stack Trace: Exception in thread "(unnamed thread)"
    java/lang/ExceptionInInitializerError
            at java/lang/J9VMInternals.initialize
    (J9VMInternals.java:269)
    java/lang/ArrayIndexOutOfBoundsException
            at sun/misc/Hashing.murmur3_32 (Hashing.java:182)
            at sun/misc/Hashing.murmur3_32 (Hashing.java:167)
            at sun/misc/Hashing.makeHashMask (Hashing.java:272)
            at java/util/HashMap.<init> (HashMap.java:116)
            at java/util/HashSet.<init> (HashSet.java:74)
            at java/lang/invoke/MethodType.<clinit>
    (MethodType.java:40)
            at java/lang/J9VMInternals.initializeImpl (Native
    Method)
            at java/lang/J9VMInternals.initialize
    (J9VMInternals.java:247)
    .
    It is possible that a customer sees :
    Type=Segmentation error vmState=0x00000000
    J9Generic_Signal_Number=00000004 Signal_Number=0000000b
    Error_Value=7ba93800 Signal_Code=00000001
    Handler1=0000020000AAE434 Handler2=0000020000B9935C
    InaccessibleAddress=00000000FDA7D000
    gpr0=000002000400E9F0 gpr1=0000000000000000
    gpr2=00000000FDA7DB32 gpr3=00000000FDA7DB32
    gpr4=0000000000000000 gpr5=0000000020067E70
    gpr6=FFFFFFFFFFFFFFFE gpr7=0000020000B56C08
    gpr8=00000200036A045C gpr9=000000002004AFC0
    gpr10=0000000020067F28 gpr11=000000002004AFC0
    gpr12=0000020000B51788 gpr13=0000000020012100
    gpr14=00000200036A0444 gpr15=0000020000A3E698
    psw=0000020000ABE8DA mask=0705E00180000000 fpc=0008000000000000
    fpr0 406384c382e1b662 (f: 2195830272.000000, d: 1.561489e+02)
    fpr1 3ff62d6660000000 (f: 1610612736.000000, d: 1.386084e+00)
    fpr2 402dc3e182ec66f1 (f: 2196530944.000000, d: 1.488258e+01)
    fpr3 402dc3e0a4b7233d (f: 2763465472.000000, d: 1.488257e+01)
    fpr4 3ff0000000000000 (f: 0.000000, d: 1.000000e+00)
    fpr5 3edbc6a87687f782 (f: 1988622208.000000, d: 6.622316e-06)
    fpr6 3fe7162d06e34aac (f: 115559088.000000, d: 7.214570e-01)
    fpr7 402dc3e182ec66f1 (f: 2196530944.000000, d: 1.488258e+01)
    fpr8 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr9 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr10 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr11 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr12 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr13 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr14 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    fpr15 0000000000000000 (f: 0.000000, d: 0.000000e+00)
    Module=/j9vm/ascii/builds/bld_118760/sdk/xz6470/jre/lib/s390x/co
    mpressedrefs/libj9vm27.so
    Module_base_address=0000020000A8B000
    Target=2_70_20120808_118760 (Linux 2.6.32-131.4.1.el6.s390x)
    CPU=s390x (1 logical CPUs) (0x7d14b000 RAM)
    ----------- Stack Backtrace -----------
    (0x0000020000ABE8DA <OSB>libj9vm27.so+0x338da<CSB>)
    

Local fix

  • Running without -Xlockword:mode=all would solve the issue and is
    unlikely to be a noticeable performance issue
    

Problem summary

  • The JIT compiler would generate incorrect code related to
    synchronization if -Xlockword:mode=all is specified.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR3
    6.0.1 SR4
    .
    The JIT compiler was updated to generate correct code in the
    problematic case.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV30271

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-15

  • Closed date

    2012-10-15

  • Last modified date

    2012-10-15

  • 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 #:

IV30271

Modified date:

2012-10-15

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