APAR status
Closed as program error.
Error description
Error Message: Segmentation Error . Stack Trace: The crash location will be in code generated into memory by the Java JIT compiler - the location will vary but the faulting instruction will be near a conditional branch. .
Local fix
The problem can be avoided by using -Xjit:disableInlining. Using this option globally will have a large negative impact on performance. To limit the performance impact it is recommended you apply the disableInlining option to the failing method(s) only by using the following syntax: -Xjit:{*class.method*}(disableInlining) Using disableInlining on a single method is unlikely to result in a noticeable impact on performance.
Problem summary
When a method is inlined by the JIT compiler, the generated code needs to have a safety check to ensure that the method inlined at compile-time is the correct method to run when the code is actually running. This check involves reading an entry at a fixed offset from the class's virtual function table. The compiler did not range check the offset against the size of the lookup table which could lead to a crash reading invalid memory in certain rare circumstances.
Problem conclusion
A range check has been added to the inline method check to ensure we do not read invalid memory. . This APAR will be fixed in the following Java Releases: 8 SR5 FP31 (8.0.5.31) . 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
IJ15120
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-03-29
Closed date
2019-03-29
Last modified date
2019-03-29
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:
29 March 2019