Michael W Chen

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:

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.