APAR status
Closed as program error.
Error description
Error Message: SIGSEGV/GPF is encountered during the JVM's execution. . Stack Trace: j9jit24!TR_Instruction::useRegister j9jit24!TR_X86RegMemInstruction::TR_X86RegMemInstruction j9jit24!TR_X86Machine::freeBestGPRegister j9jit24!assignGPRegister j9jit24!TR_X86MemoryReference::assignRegisters j9jit24!TR_AMD64MemoryReference::assignRegisters j9jit24!TR_X86MemInstruction::assignRegisters j9jit24!TR_X86MemTableInstruction::assignRegisters .
Local fix
The workaround for this issue is to exclude the method being compiled at the time of the crash from future compilation using -Xjit:exclude={<method signature>} on the Java command line.
Problem summary
A corner case existed in the code generator component of the JIT where more registers were requested to generate a code segment than are available on the x86 platform.
Problem conclusion
This defect will be fixed in: 6.0.0 SR11 5.0.0 SR15 6.0.1 SR4 7.0.0 SR3 . The corner case has been altered to request the appropriate number of registers.
Temporary fix
Comments
APAR Information
APAR number
IV20886
Reported component name
JIT
Reported component ID
620700124
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-05-09
Closed date
2012-05-09
Last modified date
2012-10-12
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
Modified date:
12 October 2012