Executable high-level trace file generation method

• US 8,327,340 B2
• Filed: 03/29/2012
• Issued: 12/04/2012
• Est. Priority Date: 07/03/2007
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Albert, Jason T., Engel, Christopher J., Farrugia, John, Van Leeuwen, Paul G., Wieman, Brent M.
• Primary Examiner(s): Vu, Tuan A
• Application Number:
  US13/434,254
• Publication Number:
  US 20120185831A1
• Time in Patent Office: 250 Days
• Field of Search: 717/106, 717/109, 717/115, 717/124, 717127-129, 717134-135, 719/310, 719/320, 709/218, 709/223, 715/804, 706/45, 716/106, 379/265.06, 455/425
• US Class Current: 717/135
• CPC Class Codes: G06F 11/3636 by tracing the execution of the program

Abstract

An executable high-level trace file generation method provides reduced debugging effort and time, particularly on initial startup of new or modified hardware. An executable program invokes high-level application programming interfaces (APIs), to perform various tasks. Instructions within the APIs generate a trace file documenting the invoked sequence of APIs by writing a line to a trace file that documents the API and input parameters received by the API. Upon completion of execution of the API, the return value may be documented as a comment line in the trace file. The resulting trace file is then re-executable as a script and may be edited to alter the sequence of APIs invoked and/or the arguments provided. The script interpreter may be a command line interface through which the APIs are invoked, and trace files may be similarly generated that document sequences of manually entered commands.

Claims

1. A method of generating an executable and user-modifiable trace file script, the method comprising:

performing execution of an executable instruction stream that invokes a sequence of high-level procedures; and

generating a trace file during execution of the executable instruction stream that represents invocations of the high-level procedure invocations as a human-readable script such that input parameters supplied to the high-level procedures by the executable instruction stream are documented in the trace file as immediate fixed values and such that return parameters supplied from the high-level procedures to the executable instruction stream are documented in the trace file as comments; and

responsive to a subsequent command, performing execution of the trace file to reproduce at least part of the behavior of the executable instruction stream.

2. The method of claim 1, further comprising editing the trace file prior to the performing the execution of the trace file to alter the behavior of the trace file, wherein the performing the execution of the trace file reproduces a behavior of the executable instruction stream in conformity with changes to the trace file made by the editing.

3. The method of claim 1, wherein the generating is performed by trace file-generating instructions embedded within the high-level procedures.

4. The method of claim 1, further comprising:

receiving a call at one of the high-level procedures;

determining whether or not a configuration parameters set indicating that the trace file should be generated;

responsive to determining that the configuration parameter is set, performing the generating; and

responsive to determining that the configuration parameter is not set, skipping the generating.

5. The method of claim 1, further comprising receiving a sequence of user input commands invoking the high-level procedures via a command interface, wherein the performing execution of the executable instruction stream executes the high-level procedures responsive to the sequence of user input commands, and wherein the generating generates a record of the sequence of user input commands that is subsequently repeated by the performing execution of the trace file.

6. The method of claim 5, wherein the command interface performs the execution of the trace file via a command that specifies the trace file as a command script.

7. The method of claim 1, wherein the high-level procedures are procedures for controlling another processing system via a command port of a service processor that controls operation of the other processing system, whereby startup or maintenance operations are documented by the trace file.