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From "Alexey Varlamov" <alexey.v.varla...@gmail.com>
Subject Re: [jdktools][jpda] Adapt Eclipse JDI implementation to complete JPDA support in Harmony
Date Tue, 24 Apr 2007 11:49:04 GMT
2007/4/24, Ivan Popov <ivan.g.popov@gmail.com>:
> I've run several experiments with JDI implementation from Eclipse and
> was able to use it for running JDB debugger demo and Netbeans
> debugger. However, there are several issues that should be solved.
> 1. Eclipse 3.0 provides quite independent JDI implementation, one can
> use two separate jars from JDT runtime bundle:
>  jdi.jar - JDI API interfaces
>  jdimodel.jar - JDI implementation
> But it corresponds to 1.4 and works not stable with Netbeans debugger,
> so it is not the case.
> 2. In the newer Eclipse 3.2 and 3.3 JDI implementation corresponds to
> 1.5 and works well with both JDB and Netbeans (except of a few issues
> mentioned below). Unfortunately, it introduces dependencies on two
> additional jars (for formatting error messages and NLS support):
>  com.ibm.icu.base_3.6.0.20061215.jar - from com.ibm.icu.base bundle
>  org.eclipse.osgi_3.3.0.v20070321.jar - from RCP Runtime Binary bundle
> The first one is quite small and independent bundle available from
> Eclipse download site and I think it's OK to add it to Harmony
> together with JDI jars. For the second one an easy stub can be
> implemented to eliminate this dependency.
> 3. All Java debuggers expect that JDI API is located in
> JDK/lib/tools.jar and implicitly add it to classpath when debugger is
> started. This means we need to repackage all classes from Eclipse's
> jdi.jar to Harmony's tools.jar. I don't like this solution, but it
> seems the only possible one. I hope there are no legal issues with
> such repackage. All other jars can be added separately and loaded with
> special class loader, similar to what is already implemented for
> Eclipse compiler jar.

What if we provide dummy tools.jar with other jars referenced via
Class-Path attribute of manifest?

> 4. There are a few bugs in implementation of JDI connectors which
> throw NPE when are used in JDB and Netbeans debuggers. I fixed this in
> my experiments and fix is rather simple. I can submit bug to Eclipse
> and attach this fix. I hope Eclipse folks can apply it quickly.
> If nobody objects I will proceed with items 2-4.
> Thanks.
> Ivan

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