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From hu jing <huj....@gmail.com>
Subject Re: [GSoC] Proposal For jdb command line debugger tool.
Date Thu, 02 Apr 2009 05:12:41 GMT
Hi Oliver.
I am sorry that my friend and I apply for one project as a group. I find
that only individual may work on a given project. So we will continue to
apply the debugger project as an individual.

2009/4/1 Oliver Deakin <oliver.deakin@googlemail.com>

> Hi, and welcome to Harmony!
> hu jing wrote:
>> Hi all,
>>    I am interested in the "jdb command line debugger tool". I find Sun jdb
> Great!
>> is not very friendly to developers. I want to add some useful function to
>> this tool. Such as, Auto-complete command line, smart format for the user
>> input. And we can also supply some interfaces to further development.
>>    Wen Dong(zwd2005@gmail.com) and I want to participate in this tool
>> development. We are from the same laboratory of the Department of Computer
>> Science of Nanjing University. We worked together for two years and now we
>> are both interns in IBM CDL. I think we can work out the debugger tool
>> pretty.
> I don't know what the rules are for co-working on a project - I believe
> each project has to be an individual effort. You could ask on the GSoC
> discussion mailing list (mailing lists and other useful info can be found
> here [1]).
>     The popular architecture is JPDA(Java Platform Debugger Architecture).
>> JPDA contains three parts: JVMTI, JDWP and JDI. JVMTI(Java Virtual Machine
>> Tool Interface) supply a set of native interface supplied by JVM. The
>> development based on the JVMTI level is complex and hard to be extended
>> and
>> modified. JDWP supplies a standard protocol for the communication between
>> the debugger and debuggee. And it also provides the socket interface. JDI
>> is
>> debug interface. It is mostly implemented in Java. JVMTI and JDWP are
>> based
>> native code. We want to implement the java command line debugger tool in
>> C/C++ considering efficiency. We will use JDWP interface for development
>> efficiency and Portability.
> Have you considered coding the tool in Java and using JDI to access all the
> required functions? I think it will be more portable, easier to maintain,
> and will fit more naturally with the other command line tools we have in
> Harmony.
>     The following is our main idea for this tool:
>>    1.format the user input.
>>    2.validate the command arguments.
>>    3.Create connection between debugger and JVM, and here we can use the
>> JDWP Transport Interface. Based on the JDWP, We create packages containing
>> the command information and send packages to JVM by using the transport
>> interface. JVM will process these packages and send the feedback to the
>> debugger. And we will process this information.
>>    4.print the message on the console.
>> Schedule:
>>       We can work 20 hours each week.
>>       April 4 ~ April 30: Be family with JDWP and JDWP Transport
>> Interface.
>>       May 1 ~ May 22: meet our mentors, read the documentation and get
>> some
>> suggestions from our mentors.
>>       May 23 ~ May 30: to determine the final framework and algorithm
>> details, divide the work with my partners.
>>       June 1 ~ June 30: coding.
>>       July 1 ~ July 5: integration, test and debug for mid-term
>> evaluations.
>>       July 6 ~ August 11: process the debug, documentation and
>> integration.
>>       August 12 ~ August 24: write test unit, debug and final release.
> Looks like a good plan. You need to clear up the issue of working with a
> partner - if that is a possibility, or you can decide on one of you to work
> on the project alone, then please draft a submission in the GSoC tool [2] as
> soon as possible. The deadline for submissions is Friday 3rd April.
> Regards,
> Oliver
> [1] http://socghop.appspot.com/document/show/program/google/gsoc2009/faqs
> [2] http://socghop.appspot.com/
>> Jing Hu , WenDong Zhang.
> --
> Oliver Deakin
> Unless stated otherwise above:
> IBM United Kingdom Limited - Registered in England and Wales with number
> 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire
> PO6 3AU

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