International Business Machines Corporation

Alan S Boxall

Trong Truong

Roger H E Pett

Morris Guan

Steven Cooper

Kendrick Wong

Roger Harry Pett

Allan Henry Kielstra

Eric Labadie

Tao Guan

Ronald Wessels

Gin Yee Ng

Thomas Lee Ellis

Violaine Batthish

Murray James Nesbitt

James T Guan

Madeline Fok

Selected information to be used for code coverage collection of an application is obtained. The selected information is a subset of debug information determined for the application and includes entry point offset information for entry points of the application. Using the entry point offset information, one or more traps are installed in the application. Code coverage collection is performed, in which a determination is made as to whether a trap has been reached. Based on the trap being reached, reach information is provided. The reach information is used to determine code being utilized in the application and for which one or more test cases are to be specifically targeted, rather than testing the application in its entirety, to reduce cycle time within the processor.

Code coverage collection based on limited select debug information

Examples of techniques for setting a stack pattern breakpoint for a COBOL program are disclosed. In one example implementation according to aspects of the present disclosure, a computer-implemented method may include providing a static program control flow view of a plurality of COBOL paragraphs of the COBOL program. The method may further include enabling a user to select the stack pattern using the static program control flow view of the plurality of COBOL paragraphs of the COBOL program. The method may also include setting, by a processing device, the stack pattern breakpoint in source code of the COBOL program using information from a compiler compiling the COBOL program to create a pseudo-stack that can be operated on by a debugger to evaluate stack pattern conditions for the plurality of COBOL paragraphs.

Stack pattern breakpoint in COBOL

An approach for collection and presentation of runtime data semantics. At least one of code-coverage history, system runtime history and code version information are received. An inspection line of code or variable(s) are received and runtime data semantics is retrieved from at least one of code-coverage history, system runtime history and code version information. The runtime data semantics are filtered based on the inspection line of code and/or variable(s) and are output.

Automatic collection and presentation of runtime data semantics

According to embodiments of the present invention, machines, systems, methods and computer program products for controlling two or more remote sessions are provided. Two or more remote sessions are synchronized to control each session using a common interface. One or more executable commands are sent to each remote session at substantially the same time using the common interface to control operation of that remote session. Data generated by each remote session from executing the commands is received and analyzed to identify one or more differences in data generated by each remote session. The one or more identified differences in the data are displayed on the common interface. An indication may be provided regarding possible root causes of the differences in the data generated by each remote session. Each remote session includes a program debug session. A report comprising the one or more identified differences in the data may be generated.

Comparative program execution through control of two or more debug sessions to automatically determine execution differences

For optimizing executable code, during a first compilation of a source code, a set of signatures is inserted in a first executable code. A signature in the set of signatures includes a combination of executable instructions. During an execution of the first executable in a debugger an instruction to call a counter code is executed from a location of the signature to increment a counter corresponding to the signature. A value of the counter is provided to a compiler to correspond with the location of the signature in the first executable code. The source code is recompiled into a second executable code, optimizing a portion of the second executable code responsive to the value exceeding a threshold. The portion is related to the location of the signature in the first executable code.

Feedback directed optimized compiling of optimized executable code

Visualization of synchronization points in modified program source code includes identifying the synchronization points in a program source code segment. The identification is performed in response to a modification of the program source code segment. The visualization of the synchronization points also includes storing line numbers of the synchronization points and line contents corresponding to text located at stored line numbers in the program source code segment. The visualization of the synchronization points further includes implementing, as part of a debugging session: retrieving the synchronization points and the line contents, displaying the line contents of the synchronization points on a display screen, and providing a user with an option to step through the synchronization points in the program source code while skipping the remaining portions of the program source code segment. Displaying the line contents includes visually differentiating the synchronization points from remaining portions of the program source code segment.

Synchronization point visualization for modified program source code

A system for remotely debugging application code on client/server systems. The system comprises a kicker program and a debugging engine installed on the server and a debugging user interface installed on a client machine. When a call is made to the application code on the server machine, the kicker program starts the debugging engine to debug the application code. The kicker program stops the debugging engine when the application code has been stepped through or returns. The debugging engine includes means for remotely starting the debugging user interface installed on the client machine.

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Markham, Canada

Alan S Boxall