Gregory Hogdal

US Patent:

7114100, Sep 26, 2006

Filed:

Apr 16, 2004

Appl. No.:

10/826228

Inventors:

Gregory Hogdal - Sammamish WA, US
John R. Eldridge - Bellevue WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 11/00
G06F 12/02

US Classification:

714 27, 714 25, 711206

Abstract:

Systems and methods are described for replicating virtual memory translation from a target computer on a host computer, and debugging a fault that occurred on the target computer on the host computer. The described techniques are utilized on a target computer having a processor that has halted execution. Virtual to physical address translation data from the target computer is transferred to the host computer. The host computer utilizes the virtual to physical address translation data to access data pointed by virtual memory addresses that were used by the target computer, and then debugs a fault by accessing the data by reading the physical memory addresson the host computer. After the virtual to physical memory address translation data have been acquired, they can be cached at the host computer.

US Patent:

7360115, Apr 15, 2008

Filed:

Mar 8, 2006

Appl. No.:

11/276644

Inventors:

Gregory Hogdal - Redmond WA, US
John R. Eldridge - Bellevue WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 11/00

US Classification:

714 27, 711 6, 717127

Abstract:

Systems and methods are described for replicating virtual memory translation from a target computer on a host computer, and debugging a fault that occurred on the target computer on the host computer. The described techniques are utilized on a target computer having a processor that has halted execution. Virtual to physical address translation data from the target computer is transferred to the host computer. The host computer utilizes the virtual to physical address translation data to access data pointed by virtual memory addresses that were used by the target computer, and then debugs a fault by accessing the data by reading the physical memory address on the host computer. After the virtual to physical memory address translation data have been acquired, they can be cached at the host computer.

US Patent:

7434100, Oct 7, 2008

Filed:

Mar 8, 2006

Appl. No.:

11/276633

Inventors:

Gregory Hogdal - Redmond WA, US
John Eldridge - Bellevue WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 11/00

US Classification:

714 27, 711 6, 711205

Abstract:

Systems and methods are described for replicating virtual memory translation from a target computer on a host computer, and debugging a fault that occurred on the target computer on the host computer. The described techniques are utilized on a target computer having a processor that has halted execution. Virtual to physical address translation data from the target computer is transferred to the host computer. The host computer utilizes the virtual to physical address translation data to access data pointed by virtual memory addresses that were used by the target computer, and then debugs a fault by accessing the data by reading the physical memory addresson the host computer. After the virtual to physical memory address translation data have been acquired, they can be cached at the host computer.

US Patent:

7447942, Nov 4, 2008

Filed:

Jul 19, 2005

Appl. No.:

11/184224

Inventors:

Michael Chen - Kirkland WA, US
Mark S. Larsen - Redmond WA, US
James A. Stulz - Bellevue WA, US
Gregory Hogdal - Sammamish WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 11/00

US Classification:

714 38, 717129, 717124

Abstract:

A technique to implement software debugging capability using breakpoints includes creating breakpoints, storing them in a watchlist, and paging out a virtual address (VA) to physical address (PA) page entry in a translation look-aside buffer (TLB). When software under test is run at full speed, memory is accessed via the TLB VA to PA page translations. When a translation is missing, an exception is generated. Handling the exception includes determining if the page missing from the TLB matches a breakpoint address in the watchlist. The address and operation type are compared to the watchlist. If the operation matches the address and not the specified data, then the software under test is single stepped, the TLB page is removed and the software under test continues to execute. If the breakpoint and data type matches, then a debugger is notified and debugger action to service the breakpoint occurs.

US Patent:

20020038437, Mar 28, 2002

Filed:

May 24, 2001

Appl. No.:

09/865934

Inventors:

Gregory Hogdal - Sammamish WA, US
John Eldridge - Bellevue WA, US

International Classification:

H04L001/22

US Classification:

714/025000

Abstract:

Systems and methods are described for replicating virtual memory translation from a target computer on a host computer, and debugging a fault that occurred on the target computer on the host computer. The described techniques are utilized on a target computer having a processor that has halted execution. Virtual to physical address translation data from the target computer is transferred to the host computer. The host computer utilizes the virtual to physical address translation data to access data pointed by virtual memory addresses that were used by the target computer, and then debugs a fault by accessing the data by reading the physical memory address on the host computer. After the virtual to physical memory address translation data have been acquired, they can be cached at the host computer.

US Patent:

20070011431, Jan 11, 2007

Filed:

Jun 27, 2005

Appl. No.:

11/167727

Inventors:

Gregory Hogdal - Sammamish WA, US
James Stulz - Bellevue WA, US
Mark Larsen - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 12/00

US Classification:

711207000

Abstract:

Software breakpoints for code that normally executes from ROM are set by remapping a page of virtual addresses normally translated to a page of physical addresses in ROM to a page of physical addresses in RAM. This new mapping is stored in the page table and translation look-aside table (TLB). Further, the information stored at the page of ROM is copied to the remapped physical addresses of the RAM. As a result, the ROM information is stored at physical addresses of RAM, and virtual addresses of that ROM code are remapped to these RAM physical addresses. Accordingly, software breakpoints can be written for the ROM code because the code is now stored in RAM.

US Patent:

20100077385, Mar 25, 2010

Filed:

Sep 23, 2008

Appl. No.:

12/236174

Inventors:

Javier Nisim Flores Assad - Bothell WA, US
Michael Hung-Hsiang Chen - Bellevue WA, US
John Robert Eldridge - Bellevue WA, US
Gregory Hogdal - Sammamish WA, US

Assignee:

MICROSOFT CORPORATION - Redmond WA

International Classification:

G06F 9/44

US Classification:

717129

Abstract:

Filtering exceptions on a target computing device to selectively interrupt a host computing device based on rules. The rules represent user-defined scenarios, and each rule includes one or more criteria and a break decision. Upon detecting an exception on the target computing device, the target computing device evaluates the rules based on the criteria and information about the exception without notifying the host computing device. For example, a score is calculated for each rule, and the rule with the highest score is selected. The break decision associated with the selected rule is applied. For example, the break decision indicates that the exception is of interest and the host computing device should be notified, or that the exception does not match a scenario of interest and execution should continue without a break.