MODIFIED IMPLEMENTATION OF JAVA DEBUG WIRE PROTOCOL

• US 20110138359A1
• Filed: 12/09/2009
• Published: 06/09/2011
• Est. Priority Date: 12/09/2009
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Deshmukh, Kiran, Chand, Pankaj, Ashish, Kumar
• Granted Patent: US 8,572,569 B2
• Time in Patent Office: Days
• US Class Current: 717/124
• CPC Class Codes: G06F 11/362 Software debugging
• CPC Class Codes: G06F 11/3664 Environments for testing or debugging software

Abstract

A client debugger application or a virtual machine includes a receiving module configured to receive a command packet of a debugging protocol from a computer. The command packet includes an identifier (ID) field. The client debugger application or the virtual machine also includes a parsing module configured to parse an ID from the ID field. One byte of the ID field doubles as a command set value and another byte of the ID field doubles as a command value. The client debugger application or the virtual machine further includes a debugging module configured to use the parsed ID, command set value and command value to perform at least one debugging operation.

Claims

1. A computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to:

receive a command packet of a debugging protocol from a computer, wherein the command packet comprises an identifier (ID) field;

parse an ID from the ID field, wherein one byte of the ID field doubles as a command set value and another byte of the ID field doubles as a command value; and

use the parsed ID, the command set value and command value to perform at least one debugging operation.

2. The computer-readable medium of claim 1, wherein the command packet received from the computer is created by a client debugger application or a virtual machine.

3. The computer-readable medium of claim 1, wherein the command packet is a command packet of a Java Debug Wire Protocol.

4. The computer-readable medium of claim 1, wherein, prior to receiving the command packet, a previous command packet is received indicating that subsequent command packets will have the ID, the command set value and the command value in the ID field.

5. The computer-readable medium of claim 1, wherein a range of IDs that may be indicated by the ID field is:

2¹⁶·

P_CS·

P_C

wherein P_CS is the number of possible command set values and P_C is the number of possible command values.

6. An apparatus, comprising:

a receiving module configured to receive a command packet of a debugging protocol from a computer, wherein the command packet comprises an identifier (ID) field;

a parsing module configured to parse an ID from the ID field, wherein one byte of the ID field doubles as a command set value and another byte of the ID field doubles as a command value; and

a debugging module configured to use the parsed ID, command set value and command value to perform at least one debugging operation.

7. The apparatus of claim 6, wherein the apparatus comprises a client debugger or a virtual machine.

8. The apparatus of claim 6, wherein the command packet is a command packet of a Java Debug Wire Protocol.

9. The apparatus of claim 6, wherein, prior to receiving the command packet, a previous command packet is received indicating that subsequent command packets will have the ID, the command set value and the command value in the ID field.

10. The apparatus of claim 9, wherein the apparatus is configured to parse command packets using a conventional implementation of a Java Debug Wire Protocol absent receipt of the previous command packet.

11. The apparatus of claim 6, wherein a range of IDs that may be indicated by the ID field is:

2¹⁶·

P_CS·

P_C

wherein P_CS is the number of possible command set values and P_C is the number of possible command values.

12. A computer-implemented method for receiving and using command packets, comprising:

receiving a command packet of a Java Debug Wire Protocol from a computer, wherein the command packet comprises a four byte identifier (ID) field;

parsing an ID from the ID field, wherein one byte of the ID field doubles as a command set value and another byte of the ID field doubles as a command value; and

using the parsed ID, command set value and command value to perform at least one debugging operation.

13. The computer-implemented method of claim 12, wherein the command packet received from the computer is created by a client debugger application or a virtual machine.

14. The computer-implemented method of claim 12, wherein, prior to receiving the command packet, a previous command packet is received indicating that subsequent command packets will have the ID, the command set value and the command value in the ID field.

15. The computer-implemented method of claim 13, wherein a range of IDs that may be indicated by the ID field is:

2¹⁶·

P_CS·

P_C

wherein P_CS is the number of possible command set values and P_C is the number of possible command values.

16. A computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to:

insert an identifier (ID) into an ID field of a command packet of a debugging protocol; and

transmit the command packet to a computer;

wherein one byte of the ID field doubles as a command set value and another byte of the ID field doubles as a command value.

17. The computer-readable medium of claim 16, wherein the command packet is a command packet of a Java Debug Wire Protocol.

18. The computer-readable medium of claim 16, wherein, prior to transmitting the command packet, a previous command packet is transmitted indicating that subsequent command packets will have the ID, the command set value and the command value in the ID field.

19. The computer-readable medium of claim 16, wherein a range of IDs that may be indicated by the ID field is:

2¹⁶·

P_CS·

P_C

wherein P_CS is the number of possible command set values and P_C is the number of possible command values.

20. A computer-implemented method for preparing and transmitting command packets, comprising:

inserting an identifier (ID) into an ID field of a command packet of a debugging protocol; and

transmitting the command packet to a computer;

wherein one byte of the ID field doubles as a command set value and another byte of the ID field doubles as a command value.

21. The computer-implemented method of claim 20, wherein the command packet is a command packet of a Java Debug Wire Protocol.

22. The computer-implemented method of claim 20, wherein, prior to transmitting the command packet, a previous command packet is transmitted indicating that subsequent command packets will have the ID, the command set value and the command value in the ID field.

23. The computer-implemented method of claim 20, wherein a range of IDs that may be indicated by the ID field is:

2¹⁶·

P_CS·

P_C

wherein P_CS is the number of possible command set values and P_C is the number of possible command values.