Hi,
2008/2/26, Ivan Popov <[EMAIL PROTECTED]>:
> JDWP agent and transport implementation was developed independent on
> Harmony's drlvm and classlib implementations in order to be run easily
> on top on any JVM. That's why it does not use any portlib support for
> platform dependent code.
>
> I agree, however, it would be better to re-use platform dependent
> support from portlib to facilitate porting jdwp code to other
> platforms. The only such code is TCP/IP sockets api used in dt_socket
> transport and loading transport DLL in the agent itself. All other
> code is based on standard JVMTI api and thus is platform independent.
>
I notice the DLL loading as well. I have an idea here that shall we
start with java-level lib loading process? For Java code it may be
quite easy to do such work as:
System.loadLibrary("libname");
We can do similar things. What does native code do in this
"System.loadLibrary", does vm/classlib native code support such API
for work? If so, we may
1) directly call that API to load lib and avoid platform differences
If no, we may
2) create a java class to do the such work, reflect in the native
TransportManager. Though it may be a little strange and slower in
performance, it may also works.
Any VM guru know what's happening in the System.loadLibrary()? Would
it be used without java-level call?
> I wish JVMTI spec to include support for loading DLLs in a platform
> independent manner, this would make implementation of multi-layered
> JVMTI agents (like JDWP agent) fully platform independent.
>
> Thanks.
>
> Ivan
>
>
> On Mon, Feb 25, 2008 at 12:56 PM, Jimmy,Jing Lv <[EMAIL PROTECTED]> wrote:
> > Hi All,
> >
> > As I read the current JDWP transport/agent implementation I found
> > that it has two folders, which means now we have two copies of code
> > for windows and Linux. As we know, Harmony have a portlib which can
> > facilitate the development to various of platforms, so I believe maybe
> > we can use portlib to merge current 2 transport/agent into one?
> > IMHO, we will get following advantage if we use portlib in JDWP:
> > 1. Harmony have various of customers on various of platform(e.g, I
> > remember some MacOS users do works on Harmony), we can use portlib to
> > support such users without any modification on code;
> > 2. keep only one copy of code, omit unnecessary copies for various of
> > platforms. In this case, if any bug/improvement occurs, we can work on
> > only one codebase so that to facilitate the developement and avoid
> > some platform-specific errors.
> >
> > And the current implementation shows we may need to refactor
> > network and memory APIs to with platform specific APIs, luckiely it
> > seems no much work.
> > Any comments/suggestions?
> >
> > --
> >
> > Best Regards!
> >
> > Jimmy, Jing Lv
> > China Software Development Lab, IBM
> >
>
--
Best Regards!
Jimmy, Jing Lv
China Software Development Lab, IBM
