APAR status
Closed as program error.
Error description
Error Message: Unhandled exception Type=Segmentation error vmState=0x0005ff05 . Stack Trace: In a debugger, a backtrace like this can be seen: TR_X86RegisterDependencyConditions::TR_X86RegisterDependencyCond itions(TR_Node*, TR_CodeGenerator*, TR_X86RegisterDependencyIndex, List<TR_X86Register>*) ()from libj9jit28.so generateRegisterDependencyConditions(TR_Node*, TR_CodeGenerator*, TR_X86RegisterDependencyIndex, List<TR_X86Register>*) () from libj9jit28.so generateLabelInstruction(TR_X86OpCodes, TR_Node*, TR_LabelSymbol*, TR_Node*, List<TR_X86Register>*, bool, bool, TR_CodeGenerator*) () from libj9jit28.so TR_X86TreeEvaluator::BBEndEvaluator(TR_Node*, TR_CodeGenerator*) () from libj9jit28.so TR_CodeGenerator::evaluate(TR_Node*) () from libj9jit28.so . Crash occurs in TR_X86RegisterDependencyConditions on x86 platforms
Local fix
Running with the option -Xjit:disableTreeSimplification will prevent the problem, at a significant cost in performance.
Problem summary
The JIT compiler could occasionally attempt to apply an inapplicable optimization to a code sequence that compares two variables of type "long", producing an invalid result that would cause subsequent compiler logic to crash.
Problem conclusion
The JIT compiler was changed to ensure it correctly recognizes candidate code sequences for the particular optimization in question. . This APAR will be fixed in the following Java Releases: 8 SR1 FP10 (8.0.1.10) . 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
IV75185
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-07-15
Closed date
2015-07-15
Last modified date
2015-07-15
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
R130 PSY
UP
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Document Information
Modified date:
15 July 2015