System and method for providing a watchdog timer to enable collection of crash data

• US 9,921,902 B2
• Filed: 02/29/2016
• Issued: 03/20/2018
• Est. Priority Date: 12/09/2013
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google LLC (Alphabet Inc.)
• Inventors: Perry, Ryan, Seibert, Jr., Jeffrey Hall, Ma, Zhen, Massicotte, Matt
• Primary Examiner(s): McCarthy, Christopher
• Application Number:
  US15/056,222
• Publication Number:
  US 20160179606A1
• Time in Patent Office: 750 Days
• CPC Class Codes: G06F 11/0706 the processing taking place on a specific hardware platform or in a specific software environment
• CPC Class Codes: G06F 11/0715 in a system implementing multitasking multitasking per se G06F9/46
• CPC Class Codes: G06F 11/0757 by exceeding a time limit, i.e. time-out, e.g. watchdogs
• CPC Class Codes: G06F 11/0778 Dumping, i.e. gathering error/state information after a fault for later diagnosis
• CPC Class Codes: G06F 11/0787 Storage of error reports, e.g. persistent data storage, storage using memory protection
• CPC Class Codes: G06F 11/1402 Saving, restoring, recovering or retrying
• CPC Class Codes: G06F 11/1415 at system level
• CPC Class Codes: G06F 11/1441 Resetting or repowering

Abstract

A system and method for providing a watchdog timer to enable collection of crash data is provided. Upon execution of certain operations, a source thread of an application initiates a watchdog thread that periodically sample state of data relating to the application. Should the operation not complete within a watchdog timeout period, the watchdog thread invokes a crash function to collect additional state data. At least a portion of the state data is stored for later analysis and debugging.

Claims

1. A system comprising:

a memory storing an application and a crash data structure;

a computer processor executing the application having a source thread and a watchdog thread, wherein the source thread initiates a predefined operation having an operating system timeout period, and wherein the watchdog thread enables the computer processor to;

determine, prior to completion of the predefined operation and prior to expiration of the operating system timeout period, that a predefined watchdog timeout period is expired, wherein the watchdog timeout period is less than the operation system timeout period;

invoke a crash function to collect state information relating to the application in response to determining that the predefined watchdog timeout period is expired; and

store the state information in a crash data structure.

2. The system of claim 1 wherein the predefined operation comprises initializing the application.

3. The system of claim 1 wherein the predefined operation comprises moving the application to a background status.

4. The system of claim 1 wherein the predefined operation comprises moving the application to a foreground status.

5. The system of claim 1 wherein the crash function is configured to store a set of crash data including information relating to a state of the application.

6. The system of claim 1 wherein the source thread is further configured to transmit a message to the watchdog thread signifying completion of the predefined operation.

7. The system of claim 6 wherein the message comprises a semaphore.

8. The system of claim 1 wherein the state information is transferred to analytic processing server to compute the watchdog timeout period.

9. A method comprising:

initiating a source thread and a watchdog thread of an application;

initiating a predefined operation of the application by the source thread, the predefined operation having an operating system timeout period;

determining, by the watchdog thread executing on a computer processor, that a predefined watchdog timeout period is expired prior to expiration of the operating system timeout period, wherein the predefined watchdog timeout period is less than the operation system timeout period;

invoking, by the watchdog thread executing on the computer processor, a crash function to collect state information relating to the application in response to the predefined operation not completing within the predefined watchdog timeout period; and

storing the state information in a crash data structure.

10. The method of claim 9 wherein the predefined operation comprises initializing the application.

11. The method of claim 9 wherein the predefined operation comprises moving the application to a background status.

12. The method of claim 9 wherein the predefined operation comprises moving the application to a foreground status.

13. The method of claim 9 wherein the crash function stores a set of crash data including information relating to a state of the application.

14. The method of claim 9 wherein the source thread is further configured to transmit a message to the watchdog thread signifying completion of the predefined operation.

15. The method of claim 14 wherein the message comprises a semaphore.

16. The method of claim 9 wherein the state information is transferred to analytic processing server to compute the watchdog timeout period.

17. A system comprising:

a computer processor;

a source thread of an application configured to initiate a predefined operation having an operating system timeout period;

a watchdog thread of the application and configured to execute on the computer processor to enable the computer processor to;

periodically sample state information relating to the application;

store at least a portion of the sampled state information; and

an operating system configured to execute on the computer processor to enable the computer processor to terminate the application upon expiration of the operating system timeout period.

18. The system of claim 17 wherein the stored state information is used to calculate a watchdog timeout period.

19. The system of claim 17 wherein the stored state information is transmitted to an analytic processing server.

20. The system of claim 17 wherein the predefined operation comprises initializing the application.