When you have determined the lowest optimization level at which the JIT or AOT compiler must compile methods to trigger the failure, you can find out which part of the Java™ program, when compiled, causes the failure. You can then instruct the compiler to limit the workaround to a specific method, class, or package, allowing the compiler to compile the rest of the program as usual. For JIT compiler failures, if the failure occurs with -Xjit:optLevel=noOpt, you can also instruct the compiler to not compile the method or methods that are causing the failure at all.
Unhandled exception Type=Segmentation error vmState=0x00000000 Target=2_30_20050520_01866_BHdSMr (Linux 2.4.21-27.0.2.EL) CPU=s390x (2 logical CPUs) (0x7b6a8000 RAM) J9Generic_Signal_Number=00000004 Signal_Number=0000000b Error_Value=4148bf20 Signal_Code=00000001 Handler1=00000100002ADB14 Handler2=00000100002F480C InaccessibleAddress=0000000000000000 gpr0=0000000000000006 gpr1=0000000000000006 gpr2=0000000000000000 gpr3=0000000000000006 gpr4=0000000000000001 gpr5=0000000080056808 gpr6=0000010002BCCA20 gpr7=0000000000000000 ...... Compiled_method=java/security/AccessController.toArrayOfProtectionDomains([Ljava/lang/Object; Ljava/security/AccessControlContext;)[Ljava/security/ProtectionDomain;
-Xjit:{java/lang/Math.max(II)I}(optLevel=warm,count=0)to compile only the failing method at an optimization level of "warm", but compile all other methods as usual.
-Xjit:exclude={java/lang/Math.max(II)I}
-Xaot:exclude={java/lang/Math.max(II)I}AOT methods are compiled at the "cold" optimization level only. Preventing AOT compilation or AOT loading is the best approach for these methods.