Patents by Inventor Thomas C. Lofgren

Thomas C. Lofgren has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dynamic instrumentation of an executable program by means of causing a breakpoint at the entry point of a function and providing instrumentation code
    Patent number: 6918110
    Abstract: Method and apparatus for dynamic instrumentation of an executable application program. The application program includes a plurality of functions, each function having an entry point and an endpoint. When the application is executed, a shared memory segment is created for an instrumentation program and the application program. Upon initial invocation of the original functions in the application program, corresponding substitute functions are created in the shared memory segment, the substitute versions including instrumentation code. Thereafter, the substitute functions are executed in lieu of the original functions in the application program.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: July 12, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert Hundt, Vinodha Ramasamy, Eric Gouriou, David J. Babcock, Thomas C. Lofgren, Jose German Rivera, Umesh Krishnaswamy
  • Dynamic instrumentation of an executable program
    Publication number: 20020152455
    Abstract: Method and apparatus for dynamic instrumentation of an executable application program. The application program includes a plurality of functions, each function having an entry point and an endpoint. When the application is executed, a shared memory segment is created for an instrumentation program and the application program. Upon initial invocation of the original functions in the application program, corresponding substitute functions are created in the shared memory segment, the substitute versions including instrumentation code. Thereafter, the substitute functions are executed in lieu of the original functions in the application program.
    Type: Application
    Filed: April 11, 2001
    Publication date: October 17, 2002
    Inventors: Robert Hundt, Vinodha Ramasamy, Eric Gouriou, David J. Babcock, Thomas C. Lofgren, Jose German Rivera, Umesh Krishnaswamy