International Business Machines Corporation

Joseph V Malinowski

David C Reed

Max D Smith

Neal E Bohling

Miguel Angel Perez

Philip R Chauvet

Harold Steven Huber

Thomas C Reed

Dash D Miller

Tabor R Powelson

Kenneth J Owin

Jeffrey Thomas Sheridan

In one aspect of the present description, operations are described for detecting whether programming code of a first computer program has been modified by a second computer program. In one embodiment, the modification detecting includes registering a first section of programming code of the first computer program in a first registry data structure. To detect a modification, the registered first section of programming code may be validated. In one embodiment, the validating includes comparing the section of programming code actually located at the first memory address to the registered first section of programming code. In another aspect, various selectable remedial actions may be taken upon detecting modification of programming code of the first computer program. Other features and aspects may be realized, depending upon the particular application.

Programming code execution management

A new layer for runtime detection of vendor hooks, with respect to a program module, includes mapping of branching instructions and their respective targets. When the program module is compiled, branch instructions are mapped and recorded to generate one or more branch maps. A branch map includes target program module addresses (or associated respective placeholders) and respective instruction offsets. At runtime, placeholders are replaced with respective target program module addresses. At runtime, actual branching information is compared to branching information included in the branch map. If a discrepancy is detected between runtime branching information and the corresponding branching information recorded in the branch map, a responsive action is triggered.

Runtime detection of code modification

A method for collecting diagnostic information associated with an I/O error is disclosed. In one embodiment, such a method includes detecting an error associated with an input/output (I/O) operation. The method determines whether the error can be re-driven and, if so, enables various diagnostic functions to improve collection of diagnostic information. The method then immediately re-drives the I/O operation associated with the error in order to recreate the error. Using the diagnostic functions that have been enabled, the method captures diagnostic information associated with the recreated error. A corresponding system and computer program product are also disclosed.

I/O error diagnostics

Provided are a computer program product, system, and method for correcting overlapping data sets in a volume. A determination is made of overlapping data sets in a first volume that are assigned a same data unit. The data sets in the first volume that are not assigned a same data unit are copied to a second volume. The same data unit is processed to determine one of the overlapping data sets for which the same data unit is intended and copied to the determined overlapping data set in the second volume.

Correcting overlapping data sets in a volume

A computer program product for managing diagnostic information is disclosed. The computer program product may include creating a data space in volatile memory. The data space may be configured to collect a selected diagnostic information. The selected diagnostic information may include a first diagnostic information from a first source and a second diagnostic information from a second source. The computer program product may include collecting in the data space the selected diagnostic information. The computer program product may include releasing from the data space at least a portion of the selected diagnostic information in response to a triggering event.

Managing diagnostic information

Provided a computer program product, system, and method for rebuilding damaged areas of a volume table using a volume data set for managing data sets assigned data units in a volume in a storage. A determination is made of damaged areas in a volume table providing information on data sets allocated in the volume. The determined damaged areas are formatted to produce reformatted areas to make the volume table usable. A volume data set in the volume having information on data sets configured in the volume is processed to determine from the volume data set salvaged data sets comprising the data sets in the volume not indicated in the volume table. Data set information is rebuilt in the reformatted areas of the volume table for the salvaged data sets.

Rebuilding damaged areas of a volume table using a volume data set

Provided are a computer program product, system, and method for determining an ordering to use to open and close programs that call other programs. A dependency file indicates for each calling program at least one called program called by the calling program, wherein a called program that calls another program also comprises a calling program. The dependency file is processed to determine an order in which the called programs are called by the calling programs. A determination is made from the order the called programs called by an invoked calling program. The determined called programs are invoked according to the order. The calling program is invoked in response to invoking the determined called programs. The order indicates the order in which the calling programs and the called programs are invoked so the called programs are invoked before invoking the calling programs that invoke the called programs.

Determining an ordering to use to open and close programs that call other programs

A method of and system for managing file transfer commands to a remote system is disclosed. The method and system may include establishing a first defined file transfer command having a first group identifier. The first defined file transfer command may be configured to pull data from the remote system. The method and system may include establishing a second defined file transfer command having a second group identifier. The second defined file transfer command may be configured to at least one of delete data of the remote system and push data to the remote system. The method and system may include performing the first defined file transfer command after performing the second defined file transfer command when the first group identifier and the second group identifier match.

Managing file transfer commands

Provided are a computer program product, system, and method for managing traces to capture data for memory regions in a memory. A trace includes a monitor parameter used by a trace procedure to monitor data in a memory device. A frequency is determined at which the trace procedure monitors the memory device. The trace procedure is invoked at the determined frequency to perform trace procedure operations comprising determining a region in the memory device according to the monitor parameter and copying data in the determined region to trace data in a data space.

Managing traces to capture data for memory regions in a memory

A method of and system for managing diagnostic information is disclosed. The method and system may include creating a data space in volatile memory. The data space may be configured to collect a selected diagnostic information. The selected diagnostic information may include a first diagnostic information from a first source and a second diagnostic information from a second source. The method and system may include collecting in the data space the selected diagnostic information. The method and system may include releasing from the data space at least a portion of the selected diagnostic information in response to a triggering event.

In one embodiment, a method includes determining that a request to allocate a target data set on a first storage includes a release command, determining an actual size of the target data set after storing the target data set on the first storage, comparing the actual size of the target data set to a break point value, relocating the target data set from cylinder-managed storage to track-managed storage of the first storage when the actual size of the target data set is less than the break point value and the target data set is stored on the cylinder-managed storage, and relocating the target data set from the track-managed storage to the cylinder-managed storage of the first storage when the actual size of the target data set is at least as great as the break point value and the target data set is stored on the track-managed storage.

Growing community of inventors

Bridgeview, IL, United States of America

Joseph V Malinowski