ON-DEMAND LOADING OF DYNAMIC SCRIPTING LANGUAGE CODE FOR REDUCED MEMORY USAGE

• US 20170315830A1
• Filed: 07/18/2017
• Published: 11/02/2017
• Est. Priority Date: 02/23/2015
• Status: Abandoned Application

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wang, Haichuan, Ye, Handong, Wu, Peng
• Application Number:
  US15/652,809
• Publication Number:
  US 20170315830A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 8/427 Parsing
• CPC Class Codes: G06F 8/4434 Reducing the memory space required by the program code
• CPC Class Codes: G06F 8/51 Source to source
• CPC Class Codes: G06F 9/44505 Configuring for program initiating, e.g. using registry, configuration files
• CPC Class Codes: G06F 9/44521 Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
• CPC Class Codes: G06F 9/44594 Unloading
• CPC Class Codes: G06F 9/45512 Command shells
• CPC Class Codes: G06F 9/45529 Embedded in an application, e.g. JavaScript in a Web browser

Abstract

A computer-implemented method and system for reducing the amount of memory space required to store applications written in dynamic scripting languages loads a program module into memory and removes a category of program code, such as debug information or function definitions, from the program module. The method and system also receives a request for debug information, or a function call or query, and determines whether or not the corresponding program code is in memory. If not, then the location in storage is identified where the program module is stored, and another copy containing the corresponding program code is loaded into memory. The corresponding program code is located and copied into the program module in memory, and a response is provided to the request.

Claims

1. A method implemented by one or more processors, wherein the one or more processors execute instructions stored on a memory to perform the method steps comprising:

receiving a request for a redacted code section of compiled code;

determining that the requested redacted code section is not in a memory and based thereon;

identifying a location in a storage where the requested redacted code section is stored from a respective placeholder of the requested redacted code section;

obtaining the requested redacted code section from the identified storage location; and

modifying the compiled code to include the obtained redacted code section.

2. The method of claim 1 wherein the obtained redacted code section is a function definition or debugging information.

3. The method of claim 2 wherein the obtained redacted code section is a function definition and wherein modifying the compiled code to include the obtained redacted code section comprises forming a complete function in the compiled code using the obtained redacted code section.

4. The method of claim 1, wherein modifying the compiled code to include the obtained redacted code section comprises:

compiling the obtained redacted code section; and

inserting the compiled redacted code section into the compiled code in place of the placeholder.

5. The method of claim 1 wherein identifying the location in the storage wherein the requested redacted code section is stored from the respective placeholder of the requested redacted code section comprises:

obtaining a location of a file and an offset within the file where the requested redacted code section in stored.

6. The method of claim 1 wherein the request is a function call or a query of a function definition.

7. The method of claim 1, further comprising executing the modified compiled code.

8. The method of claim 7 wherein the execution is within a virtual machine.

9. The method of claim 1, further comprising, prior to receiving the request:

redacting the code section from dynamic scripting language program source code.

10. The method of claim 1, further comprising, prior to receiving the request:

inserting the respective placeholder in program source code for the redacted code section to generate redacted program code.

11. The method of claim 1, further comprising, prior to receiving the request:

compiling redacted program code to generate the compiled code.

12. A system comprising:

a memory storage comprising instructions; and

one or more processors in communication with the memory, wherein the one or more processors execute the instructions to;

receiving a request for a redacted code section of compiled code;

determine that the requested redacted code section is not in a memory and based thereon;

identify a location in a storage where the requested redacted code section is stored from a respective placeholder of the requested redacted code section;

obtain the requested redacted code section from the identified storage location; and

modify the compiled code to include the obtained redacted code section.

13. The system of claim 12 wherein the obtained redacted code section is a function definition or debugging information.

14. The system of claim 12 wherein the obtained redacted code section is a function definition and wherein the one or more processors execute the instructions to perform:

form a complete function in the compiled code using the obtained redacted code section.

15. The system of claim 12, wherein the one or more processors execute the instructions to perform:

compile the obtained redacted code section; and

insert the compiled redacted code section into the compiled code in place of the placeholder.

16. The system of claim 12, wherein the one or more processors execute the instructions to perform:

obtain a location of a file and an offset within the file where the requested redacted code section in stored.

17. The system of claim 12, wherein the request is a function call or a query of a function definition.

18. The system of claim 12, wherein the one or more processors execute the instructions to perform execute the modified compiled code.

19. The system of claim 18 wherein the execution is within a virtual machine.

20. A non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors execute the instructions to:

receive a request for a redacted code section of compiled code;

determine that the requested redacted code section is not in a memory and based thereon;

identify a location in a storage where the requested redacted code section is stored from a respective placeholder of the requested redacted code section;

obtain the requested redacted code section from the identified storage location; and

modify the compiled code to include the obtained redacted code section.