Hewlett-packard Development Company, L.p.

Edward J Sharpe

Sushanth Rai

Louis D Huemiller, Jr

Zhi-Hui Xu

Robert Hundt

Sujoy Saraswati

Lawrence D K B Dwyer

William N Pohl

Harshadrai Parekh

Eric Gouriou

Vasudevan Sangili

Eric Hamilton

James Alan Woodward

Jenchang Ho

Steven M Valentine

Elizabeth An-Li Clark

An embodiment of the invention provides an apparatus and a method for direct switching of software threads. The apparatus and method include performing acts including: issuing a wakeup call from a first thread to a second thread in a sleep state; removing the second thread from the sleep state; switching out the first thread from the resource; switching in the second thread to the resource; and running the second thread on the resource.

Direct switching of software threads by selectively bypassing run queue based on selection criteria

In an embodiment of the invention, an apparatus and method for a target thread selection in a multi-threaded process perform the steps of receiving a signal that may or may not be masked by threads in the process; and searching a thread subset for a target thread that can handle the signal. A signal daemon may search for the target thread if the target thread is not found in the thread subset.

Target thread selection in a multi-threaded process

To handle a signal received at an application context that employs a remote kernel service implemented in a server context different from the application context, the remote kernel service receives from the application context a first signal. Using a signal action vector file associated with the server context, a first action code associated with the first signal is ascertained. If the first action code represents a pseudo-handler, the remote kernel service is aborted.

Handling a signal at an application context that employs a remote kernel service

Systems, methods, and device are provided for program stack handling. One method embodiment includes recognizing that a fault has occurred because a particular address range in a memory stack has been accessed. The method includes evaluating a current utilized size of regions in the memory stack. A particular address range between the current utilized size of regions in the memory stack is then relocated.

Program stack handling

A monitoring interface, includes logic responsive to a pre-fork event, the pre-fork event responsive to a vfork system call. The pre-fork event includes indicia that identifies a child process to be created in accordance with the vfork system call. A method for controlling the execution of a child process created from a parent process, where the parent process is monitored by a software tool includes, receiving indicia that a vfork system call will be executed by the parent process, suspending execution of the parent process, extracting a process identifier from the indicia of the vfork system call, the process identifier corresponding to a child process to be generated by the parent process when the parent process executes the vfork system call, setting a process monitor thread to observe the child process, and resuming execution of the parent process to enable the parent process to execute past the vfork system call.

Method and apparatus for controlling execution of a child process generated by a modified parent process

A method in a computer for facilitating interaction between an application program and a subsystem is disclosed. The method includes providing a virtual process file system layer. The virtual process file system layer is configured to interact with the subsystem in a substantially content-independent manner. The method additionally includes providing a content dependent module, the content dependent module being associated with the subsystem and is configured interact with the subsystem in a content-dependent manner. The method further includes providing a directory structure table, the directory structure table being configured to track a name of the content dependent module, wherein the content-dependent module is configured to be registered with the directory structure table using a dynamic name.

Virtual process file systems and methods therefor

A method in an operating system of a computer for allowing a plurality of application programs to interact with a plurality of subsystems, at least two application programs of the plurality of application programs being associated with two different personalities. The method includes providing a plurality of modules, each of the plurality of modules being associated with at least one personality and configured to interact with one of the plurality of subsystems, at least two modules of the plurality of modules being associated with the two different personalities. The method further includes providing a process state module for tracking personality data associated with the plurality of modules, thereby allowing a first application program of the two application programs to employ a first module of the two modules to interact with a given subsystem of the plurality of subsystems, the first application program and the first module being associated with one of the two different personalities, wherein the two application programs are configured to operate concurrently.

Growing community of inventors

Los Gatos, CA, United States of America

Edward J Sharpe