Determining whether a Java object has been scan-missed by a garbage collector scan

A system for detecting a scan-miss of a Java object during a mark phase of a garbage collection cycle, the Java object being related to an application in use, comprising:

• a processor;
• and memory connected to said processor, wherein said memory is encoded with instructions and wherein the instructions when executed comprise:
• instructions for creating an unscanned object list of scan-miss candidates during a sweep phase of the garbage collection cycle, said unscanned object list comprising objects of a particular object type that were not marked in the mark phase of the garbage collection cycle;
• after the garbage collection cycle is completed and the application resumes, for each PUTFIELD and each GETFIELD operation on said particular object type and a parent of said particular object type, instructions for iterating through said unscanned object list;
• instructions for identifying a scan-miss object by determining whether a current object, that is of said particular object type being referenced, is on said unscanned object list;
• and
• instructions for initiating a system crash and any appropriate diagnostics upon identifying said scan-miss object.

A computer program product for detecting a scan-miss of a Java object during a mark phase of a garbage collection cycle, the Java object being related to an application in use, the computer program product comprising a computer readable storage device having computer readable program code embodied therewith, the computer readable program code comprising:

• computer readable program code configured to create an unscanned object list of scan-miss candidates during a sweep phase of the garbage collection cycle, said list comprising objects of a particular object type that were not marked in the mark phase of the garbage collection cycle;
• after the garbage collection cycle is completed and the application resumes, for each PUTFIELD and each GETFIELD operation on said particular object type and a parent of said particular object type, computer readable program code configured to iterate through said unscanned object list;
• computer readable program code configured to identify a scan-miss object by determining whether a current object, that is of said particular object type being referenced, is on said unscanned object list;
• and
• computer readable program code configured to initiate a system crash and relevant diagnostics to detect object corruption upon identifying said scan-miss object.