CAPTURING TELEMETRY DATA BY DYNAMIC LANGUAGE ENGINE

• US 20130132930A1
• Filed: 11/23/2011
• Published: 05/23/2013
• Est. Priority Date: 11/23/2011
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Seth, Gaurav, Qu, Yong, Hamilton, Jennifer A.
• Granted Patent: US 9,069,897 B2
• Time in Patent Office: Days
• US Class Current: 717/115
• CPC Class Codes: G06F 11/0709 in a distributed system consisting of a plurality of standalone computer nodes, e.g. clusters, client-server systems
• CPC Class Codes: G06F 11/0748 in a remote unit communicating with a single-box computer node experiencing an error/fault remote testing G06F11/2294
• CPC Class Codes: G06F 11/0778 Dumping, i.e. gathering error/state information after a fault for later diagnosis
• CPC Class Codes: G06F 11/366 using diagnostics G06F11/0703 takes precedence
• CPC Class Codes: G06F 2209/481 Exception handling
• CPC Class Codes: G06F 9/45529 Embedded in an application, e.g. JavaScript in a Web browser

Abstract

At least one embodiment described herein relates to the selective capturing of script code stacks associated with exceptions thrown by script code. For unhandled exceptions, the script engine 1) captures the script code stack in a host-accessible manner in which a host that hosts the script engine may access the captured script code stack, 2) completes unwinding of the script stack, and 3) reports the captured script code stack to a host that hosts the script engine. For at least one of the handled exceptions thrown by the script code for which the script code itself handles the exception, the script code stack is not captured in the host-accessible manner. Also, the call stack property of an error object is populated at throw time, rather than creation time.

Claims

1. A method for selectively capturing script code stacks associated with a plurality of exceptions thrown by script code, the method comprising:

for each of at least one exception thrown by the script code for which the script code does not handle the exception, performing the following;

an act of the script engine capturing a script code stack representing at least a portion of a script stack associated with the script code when the exception was thrown, wherein the act of capturing occurs in a host-accessible manner in which a host that hosts the script engine may access the captured script code stack;

an act of the script engine completing unwinding of the script stack after the act of capturing the script code stack; and

an act of the script engine reporting the captured script code stack to a host that hosts the script engine; and

for at least one exception thrown by the script code for which the script code itself handles the exception, an act of abstaining from capturing the script code stack in the host-accessible manner.

2. The method in accordance with claim 1, wherein the host is an operating system.

3. The method in accordance with claim 1, wherein the host is a browser.

4. The method in accordance with claim 1, wherein the script code stack represents the script stack at the time the exception was thrown.

5. The computer program product in accordance with claim 1, wherein the script code stack represents all of the script stack at the time the exception was thrown.

6. The method in accordance with claim 1, wherein the script code stack represents a portion of the script stack in which a top portion of the script stack is removed.

7. The method in accordance with claim 6, wherein a bottom portion of the script stack that remains in the captured script code stack includes a number of stack frames that is configurable by a user.

8. The method in accordance with claim 6, wherein the top portion includes a recursion portion.

9. The method in accordance with claim 1, wherein the an act of the script engine completing unwinding of the script stack after the act of capturing the script code stack occurs before the act of the script engine reporting the captured script code stack to a host that hosts the script engine.

10. The method in accordance with claim 1, wherein the host performs the following for at least one exception reported in the act of the script engine reporting:

an act of displaying the captured script code stack to a user.

11. The method in accordance with claim 1, wherein the host performs the following for at least one exception reported in the act of the script engine reporting:

an act of causing the script engine to cease execution of the script code.

12. The method in accordance with claim 1, wherein the captured script code stack is a logical script code stack.

13. The method in accordance with claim 1, wherein the captured script code stack is a physical script code stack.

14. A computer program product comprising one or more computer-storage media having thereon computer-executable instructions that are structured such that, when executed by one or more processors of a computing system, cause the computing system to operate a script engine that is configured to perform the following:

an act of executing user script in which an error object is created that may have an associated unpopulated call stack property;

an act of the user script throwing an exception associated with the error object;

an act of capturing a script code stack representing at least a portion of a script stack associated with the script code when the exception was thrown; and

an act of populating the call stack property of the error object with the captured script code stack.

15. The computer program product in accordance with claim 14, wherein the script code stack represents all of the script stack at the time the exception was thrown.

16. The computer program product in accordance with claim 14, wherein the script code stack represents a portion of the script stack in which a top portion of the script stack is removed.

17. The computer program product in accordance with claim 16, wherein a bottom portion of the script stack that remains in the captured script code stack includes a number of stack frames that is configurable by a user.

18. The computer program product in accordance with claim 16, wherein the top portion includes a recursion portion.

20. The computer program product in accordance with claim 14, wherein the captured script code stack for at least one of the unhandled exceptions represents all of the script stack at the time the exception was thrown.

19. A computer program product comprising one or more computer-storage media having thereon computer-executable instructions that are structured such that, when executed by one or more processors of a computing system, cause the computing system to operate an environment that comprises

a script engine that A) for each unhandled exception thrown by the script code for which the script code does not handle the exception, 1) capture a script code stack representing at least a portion of a script stack associated with the script code when the exception was thrown, wherein the act of capturing occurs in a host-accessible manner in which a host that hosts the script engine may access the captured script code stack, 2) complete unwinding of the script stack after the script code stack is capture, and 3) report the captured script code stack;

and B) for each handled exception thrown by the script code for which the script code itself handles the exception, an act of abstaining from capturing the script code stack in the host-accessible manner; and

a host configured to

     1) receive the captured script code stack, and perform at least one of the following;

an act of displaying the captured script code stack to a user.

an act of causing the script engine to cease execution of the script code.