APAR status
Closed as program error.
Error description
Error Message: A JIT segmentation error is received compiling a Java method that ends up invoking the DataAccessAccelerator (DAA) API on z14 Linux and z/OS. . Stack Trace: A Linux segmentation fault with the following functions on the stack OMR::Z::MemoryReference::calcDisplacement(unsigned char*, TR::Instruction*, TR::CodeGenerator*) + 100 OMR::Z::MemoryReference::generateBinaryEncoding(unsigned char*, TR::CodeGenerator*, TR::Instruction*) + 314 OMR::Z::CodeGenerator::doBinaryEncoding() + 1220 OMR::CodeGenPhase::performBinaryEncodingPhase(TR::CodeGenerator* , TR::CodeGenPhase*) + 172 OMR::CodeGenPhase::performAll() + 224 OMR::CodeGenerator::generateCode() + 110 OMR::Compilation::compile() + 9996 TR::CompilationInfoPerThreadBase::compile(J9VMThread*, TR::Compilation*, TR_ResolvedMethod*, TR_J9VMBase&, TR_OptimizationPlan*, TR::SegmentAllocator const&) + 2704 TR::CompilationInfoPerThreadBase::wrappedCompile(J9PortLibrary*, void*) + 1674 omrsig_protect + 892 TR::CompilationInfoPerThreadBase::compile(J9VMThread*, TR_MethodToBeCompiled*, J9::J9SegmentProvider&) + 1172 TR::CompilationInfoPerThread::processEntry(TR_MethodToBeCompiled &, J9::J9SegmentProvider&) + 632 TR::CompilationInfoPerThread::processEntries() + 790 TR::CompilationInfoPerThread::run() + 62 protectedCompilationThreadProc(J9PortLibrary*, TR::CompilationInfoPerThread*) + 200 omrsig_protect + 892 compilationThreadProc(void*) + 496 thread_wrapper + 340 .
Local fix
This issue can be worked around using the -Xjit:disableVectorBCD option.
Problem summary
The problem is caused when a Java method calls the DAA API and the API method is hardware accelerated using z14 vector packed decimal instructions. The JIT compiler crashes when emitting such vector instructions.
Problem conclusion
A fix has been made and delivered to the Java JIT to prevent the crash from happening when emitting z14 vector packed decimal instructions. . This APAR will be fixed in the following Java Releases: 8 SR5 FP15 (8.0.5.15) . 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
IJ05810
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-04-17
Closed date
2018-05-10
Last modified date
2018-05-10
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
[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSC9HBA","label":"Just In Time (JIT) Compiler"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"130","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
10 May 2018