Microsoft Technology Licensing, LLC

Zhigu Holdings Limited

Philip Lucido

Shankar Vaidyanathan

Sundeep Bhatia

Paul F Ringseth

Niklas Gustafsson

Richard M Shupak

Rahul V Patil

Louis Lafreniere

Genevieve Fernandes

Bryan William Tuttle

Rick Molloy

Brandon R Bray

Daniel R Spalding

Rahul Patil

Paul Ringseth

A runtime environment of a computer system is provided that creates first and second scheduler instances in a process. Each scheduler instance includes allocated processing resources and is assigned a set of tasks for execution. Each scheduler instance schedules tasks for execution using the allocated processing resources to perform the work of the process.

Method of assigning instructions in a process to a plurality of scheduler instances based on the instruction, in which each scheduler instance is allocated a set of negoitaited processor resources

A logger in a process of a computer system creates a log queue for each execution context and/or processing resource in the process. A log is created in the log queue for each log request and log information associated with the log request is stored into the log. All logs in each log queue except for the most recently added log in each log queue are flushed prior to the process completing.

Method for selective flushing logs within multiple queues concurrently

A memory allocator is provided for each processor resource in a process of a computer system. Each memory allocator includes a set of pages, a locally freed list of objects, and a remotely freed list of objects. Each memory allocator requests the pages from an operating system and allocates objects to all execution contexts executing on a corresponding processing resource. Each memory allocator attempts to allocate an object from the locally freed list before allocating an object from the remotely freed list or an allocated page.

Memory allocators corresponding to processor resources

Security mechanisms detect and intervene in a malicious attack against a runtime function, even in the presence of a coding flaw such as a buffer overrun or overflow. One such exemplary mechanism uses a predetermined security list of the valid targets for a first runtime function (such as longjmp). For every call to a second runtime function (e.g., setjmp) that prepares for a later invocation of the first runtime function, the dispatcher finds and stores a reference to this list. When a subsequent attack targets the runtime functions by creating an attacker-provided setjmp target address (e.g., the attack overwrites the longjmp target address so that the pointer points somewhere else, such as code provided by the attacker or code that already exists that will eventually pass control to code provided by the attacker), the new (attacker provided) target address is compared to a reference list of the real (valid) target addresses. The list of real target addresses is stored in memory. If the target address that has been provided is found on the reference list, then the runtime function (e.g., longjmp) is allowed to continue to execute by the dispatcher (which may be the actual runtime function). Otherwise, the dispatcher assumes the application is under attack and terminates the process' execution.

Protection against runtime function attacks

Safe exceptions detect and intervene in a malicious attack against an application or system component, even in the presence of a coding flaw such as a buffer overrun. A list of all the exception handlers in an image (e.g., a DLL or EXE) is desirably created. When loading the image into a process, the operating system loader finds and stores a reference to this list. When a subsequent attack targets exception handling by creating an attacker provided exception handler, the new attacker provided exception handler is compared to a list of the real exception handlers. The list of real exception handlers is stored in memory, and desirably cannot be modified. In particular, when an exception occurs, the operating system finds the proper exception handler from information on the stack (this may be under attack, so the information is not trusted) and compares it to the previously created read-only reference list. If the exception handler that has occurred is found on the reference list, the exception handler is allowed to execute. Otherwise, the operating system assumes the application is under attack and terminates the process' execution.

Safe exceptions

Automatic parameter help is disclosed. In one embodiment, the system comprises an editor to provide for developing source code for a computer program, where the source code includes an identifier; and an automatic help module invoked upon a predetermined event by the editor. The automatic help module is operative to display reference information associated with the identifier.

Automated help system for reference information

Dynamic parsing is disclosed. In one embodiment, a system includes an editor and a dynamic parser. The editor provides for developing of source code for a computer program. The dynamic parser parses the source code as the source is developed within the editor during predetermined times (for example, in one embodiment, every second).

Dynamic parsing

Automatic statement completion is disclosed. In one embodiment, a system includes an editor to provide for developing source code for a computer program, and a database containing information on entities in the source code. The system also includes a completion module invoked by the editor upon the occurrence of a predetermined event and operative to display a set of valid entities in response to a pre-determined event.

Automatic statement completion

Indexing and searching across multiple sorted arrays. In one embodiment, a method. First, for a plurality of arrays, each array having a plurality of elements indexable by a pointer for the array, finding a smallest element of a set of elements comprising the element of each array at the pointer for the array. Second, increasing the pointer for the array in which the smallest element was found. Third, repeating until a desired number of smallest elements is found.

Growing community of inventors

Redmond, WA, United States of America

Philip Lucido