APAR status
Closed as program error.
Error description
Error Message: Various symptoms can occur such as a crash, unexpected exceptions or incorrect behaviour. . Stack Trace: N/A . This problem can only occur on X86 32-bit systems.
Local fix
The following environment variable needs to be set to avoid the problem. TR_DisableEBPasGPR=1
Problem summary
The JIT compiler uses the EBP register as both a general purpose register as well as for holding JVM internal pointers on X86 32-bit systems. At various points in a JIT compiled method, EBP needs to contain a JVM internal pointer, and so the value it previously held as a general purpose register needs to be moved and preserved. The JIT compiler was not correctly handling all of these cases, so it is possible for the incorrect value to be in EBP.
Problem conclusion
The JIT compiler has been updated to no longer use EBP as a general purpose register on X86 32-bit systems. . This APAR will be fixed in the following Java Releases: 8 SR4 FP6 (8.0.4.6) 8 SR5 FP10 (8.0.5.10) . 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
IV96648
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-05-26
Closed date
2017-05-26
Last modified date
2018-08-13
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:
13 August 2018