APAR status
Closed as program error.
Error description
Error Message: JVM crashes while throwing a ClassCastException on x86 64 bit with compressed references. System corefile analysis will find that one of the two class pointers is sign-extended to 64 bits(0xFFFFFFFF????????). . Stack Trace: The native callstack will include internalSendExceptionConstructor() internalSetCurrentExceptionWithCause() setClassCastException() impl_jitClassCastException() jitThrowClassCastException() .
Local fix
The problem can be avoided by using the JVM command line option -Xjit:disableInlineCheckcast Note that there can only be one -Xjit on the command line, so if necessary multiple options can be combined with commas. Alternatively, disabling compressed references will also avoid the problem. -Xnocompressedrefs
Problem summary
When running 64 bit compressed refs, if clazz is an address above the 2G boundary then we can't use a push 32bit immediate instruction to pass it on the stack to the jitThrowClassCastException helper as the address gets sign extended. It needs to be stored in a temp register and then push the register to the stack.
Problem conclusion
The x86 code generator was modified to use a different instruction sequence when passing class pointers that are in memory above 2GB. . This APAR will be fixed in the following Java Releases: 8 SR6 FP35 (8.0.6.35) . 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
IJ33326
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2021-06-18
Closed date
2021-06-18
Last modified date
2021-06-18
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
[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"130"}]
Document Information
Modified date:
19 June 2021