Red Hat, Inc.

David Hugh Malcolm

Havoc Pennington

Owen Taylor

Seth Aaron Nickell

Alexander Tobias Larsson

Brian M Stevens

John Ross Dennis

Judith L Uffer

Heather Brodeur

Mark Brian McLoughlin

John W Lockhart

Jonathan Richard Blandford

One or more of the classes is defined using an attribute or keyword that indicates that the one or more classes may be defined as singleton classes or non-singleton classes (a class that may be instantiated more than once). A compiler system converts the class to a singleton class when the compiler system receives a command or request indicating that the class is to be defined as a singleton class. Various optimizations may be performed when one or more of the classes in the source code are defined as singleton classes. The compiler system may not convert the class to a singleton class when the compiler system receives a command or request indicating that the class is to be defined as a non-singleton class.

Defining classes as singleton classes or non-singleton classes

A compiler system analyzes source code for an application. The compiler system determines whether a class in the source code uses a singleton pattern even though the class is not defined as singleton class. The compiler system may optionally convert the class to a singleton class. The compiler system may also perform one or more optimizations when generating the application based on the source code.

Identifying singleton classes

Embodiments relate to systems and methods for generating a progress indicator in a programming loop. In embodiments, a programming language or application programming interface (API) can contain a loop operator that registers the occurrence of each iteration in a loop, and passes that information to a user interface to display an indicator of loop progress to a programmer or user. The progress notification can be a thermometer-style graph, a progress bar, or other graphical or other display representing the progress of the programming or process loop. In embodiments, the progress indicator and related information can be dumped to a log file, to create a record of loop progress to review and perform debugging operations, in the event of a crash during execution of the loop.

Generation of a progress notification in a software loop

An embodiment relates generally to a method of playback in a media player. The method includes retrieving at least one song from a media library in a random mode on a media player and playing the at least one song through the media player. The method also includes initiating an album mode on the media player and retrieving remaining songs on an album associated with the at least one song.

Album playback in a random mode

A programming and debugging system identifies one or more statically-allocated symbols in a symbol table for an inferior process. The statically-allocated symbols pertain to one or more structures for the inferior process. The inferior process has dynamic memory allocations in an inferior process memory space. The symbol table comprises data used to categorize the statically-allocated area of memory. The system locates the structures in the inferior process memory space and determines whether an address of the structures in the inferior process memory space matches an address of a block of the dynamically allocated area of memory. The system categorizes the block of dynamically allocated memory based on the determination of whether an address of the structures matches an address of a block of the dynamically allocated area of memory.

Using symbol information for categorization of dynamic memory allocations

A programming and debugging system determines a block of dynamically allocated memory in an inferior process memory space corresponds to a structure and casts the block of memory as an instance of the structure. The programming and debugging system determines a field type of a field in the instance of the structure and determines whether memory data pertaining to the block of dynamically allocated memory satisfies one or more criteria in heuristics data associated with the field type. The programming and debugging system categorizes the block of dynamically allocated memory based on the determination of whether the memory data satisfies the one or more criteria of the field type.

Using heuristics for field types of a structure to categorize dynamic memory allocations

A computing system determines whether memory data pertaining to a block of dynamically allocated memory within an inferior process memory space satisfies one or more criteria in heuristics data. The computing system identifies a category to assign to the block of dynamically allocated memory based on the determination of whether the memory data satisfies the criteria and generates a reliability score for the block of dynamically allocated memory indicating a level of reliability of the identified category. The computing system categorizes the block of dynamically allocated memory based on a comparison of the reliability score and a previous reliability score of the block of the dynamically allocated memory.

Debugging a dynamic memory allocation using heuristics reliability scores

Embodiments of the present invention relate generally to error reporting methods and systems. An error reporting application may be configured to be a stand-alone program, embedded within another application, or added as a plug-in application. The error reporting application may also be configured to provide a mechanism for a user to describe a problem with another application and send the problem description to a configurable, user defined location. The error report from the error reporting application may then be processed by an error processing system at the user-defined location.

Method and system for site configurable error reporting

A computer system comprises a server. The server, in turn, comprises one or more master instances of an operating system (OS). The OS comprises a set of computer program files to operate a computer. The server also includes a version-managing program maintaining the one or more master operating systems. The computer system also includes a number of client computers each of which is configured to operate using one of the one or more master operating systems as read-only files.

System, method, and medium for configuring client computers to operate disconnected from a server computer while using a master instance of the operating system

Embodiments of the present invention provide a multi-input comparative testing tool. The present invention looks at the internal structure of the software being tested and compares the two pairs of internal structures. In the present invention, the testing tool is capable of receiving multiple program code files or data files as its input. For each program code file, the testing tool generates a collection of problem objects and compares pairs of the problem collections with each other. The present invention may also run on data files having program code. For example, the present invention is capable of testing extensible markup language (XML) files to determine if they validate against a schema. Problem objects that are in both collections are identified and set aside. The remaining problem objects are then marked either as being resolved or new depending in which collection they exist.

Methods and systems for testing tool with comparative testing

A method and apparatus for providing a portable device recommendation system. The method may include storing, on a portable device, preferences of a user of the portable device with respect to media content, and facilitating sharing of desirable media content between this user and a user of another portable device based on the user preferences.

Portable media player recommendation system

Embodiments of the present invention provide a tamper proof file system. In particular, the present invention utilizes a virtual block device that is coupled with a real block device and a private/public key pair. The virtual block device receives the original data and then digitally signs it with the private key. The virtual block device then passes the digitally signed data to the real block device for storage. In order to retrieve or verify the data, the virtual block device may provide the public key and an acknowledgment. The acknowledgment may include a hash of the public key. The virtual block device is configured to discard the private key and to be removed from the system based on a finite lifespan.

Methods and systems for tamper resistant files

Some embodiments of a method and an apparatus to provide interoperability between different digital content protection schemes have been presented. In one embodiment, a first copy of digital content encrypted using a first protection scheme is received from a user. In response to a request from the user, it is verified that the user is a rightful owner of the first copy without decrypting the first copy. A second copy of the digital content encrypted using a second protection scheme is sent to the user if the user is a rightful owner of the first copy.

Growing community of inventors

Somerville, MA, United States of America

David Hugh Malcolm