International Business Machines Corporation

Alan Petter Stevens

Robert Francis Berry

A method for modifying a class file to monitor data flow is provided. The method includes selecting () one or more methods in the class file and adding () one or more lines of code to report incoming arguments and return values, if any, in the selected method. The incoming arguments and return values are reported () to an instrumentation interface which may be an instrumentation class defining methods for each type of argument in the method. The one or more lines of code pass the incoming arguments and return values to the appropriate instrumentation class method. The method may produce a profile of data flow including a record of incoming arguments and return values, if any, for one or more methods in a class file. The record can include data describing the types and values of arguments and return values and their distribution.

Method for modifying a class file to monitor data flow

The invention relates to an apparatus for providing event data, generated by a JVM local to the apparatus, to a profiling agent on a remote system as requested by that agent. A request is received at the apparatus, via a network interface, from the profiling agent for certain event data. This request is forwarded via the JVMPI to the JVM and the requested data is transmitted to the apparatus, as and when generated by the JVM. (The event data is also transmitted via the JVMPI). The event data is then transmitted to the profiling agent via the network interface.

Growing community of inventors

Winchester, United Kingdom

Alan Petter Stevens