APAR status
Closed as program error.
Error description
Error Message: A SIGSEGV/GPF is raised by the Java JIT run-time library code that manages code caches. This crash only occurs if the JVM is running on a 64-bit x86-based processor. . Stack Trace: TR_MCCCodeCache::replaceTrampoline TR_MCCManager::replaceTrampoline mcc_replaceTrampoline amd64CodePatching TR_MCCCodeCache::patchTrampoline TR_MCCCodeCache::patchCallPoint mcc_callPointPatching_unwrapper jitCallCFunction mergedStaticGlueCallFixer .
Local fix
N/A
Problem summary
On x86-64, if a JIT-compiled method calls an interpreted method, the JIT compiler generates a special data structure in the current code cache. If another code cache becomes current before the compilation has completed, the data structure in the original current code cache becomes obsolete, and future searches for this data structure in the current code cache will fail, which will cause the JVM to crash.
Problem conclusion
This defect will be fixed in: 7.0.0 SR3 6.0.1 SR4 5.0.0 SR15 . The JIT compiler has been modified to re-reserve space for a new data structure for the interpreter dispatch if it detects that the current code cache has been switched.
Temporary fix
N/A
Comments
APAR Information
APAR number
IV25380
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-07-30
Closed date
2012-07-30
Last modified date
2012-07-30
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
[{"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":"260","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
30 July 2012