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From Gregory Shimansky <gshiman...@apache.org>
Subject Re: [jdktools][JDWP]using portlib to support JDWP transport/agent?
Date Thu, 28 Feb 2008 09:10:11 GMT
On 28 февраля 2008 Tony Wu wrote:
> On 2/28/08, Jimmy,Jing Lv <firepure@gmail.com> wrote:
> > Hi,
> >
> >     Thanks Gregory, I find it may not be proper to using java code at
> > that phase.
> >     I search the current DRLVM to find what does System.loadLibrary()
> > exactly do, it traces to kernel_classes
> > (java_lang_System,java_lang_VMExecutionEngine,etc) and class_support
> > (classloader),  at last, natives_load_library() in natives_support.cpp
> > was invoked and called port_dso_load_ex(), then apr_dso_load() (which
> > was in dso.cpp). This seems a APR method which was implemented in both
> > windows and linux.
> >     What's more, I check Harmony PortLib, and find
> > hysl_open_shared_library(in hysl.c) which was used to load library for
> > zlib in Harmony. So it seems good for our use to load library for all
> > platforms(please correct me if I'm wrong).
> >     To sum up, I'd like to raise 2 possible way to solve the problem IMO:
> > 1. we call the vm method natives_load_library() to load library, which
> > may requires the vm to export such method and drlvm guru may offer
> > help for that?
>
> How to handle the other VMs? I think it's not a public api.
>
> > 2. we call the portib hysl_open_shared_library() to load the library,
> > if it does work well for it.
>
> +1 to portlib. Anyway we have the portlib in classlib already

I also think that using VM internal functionality is not an option. We can't 
make the agent depend on it. So port library is the only option.

-- 
Gregory

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