Re: [aspectj-users] Using the -injar compiler option

[Wes Isberg <wes@xxxxxxxxxxxxxx>]

Hmm... looks like a cycle in the InstructionHandle list:

---- Utility.java
  public static int getSourceLine(InstructionHandle ih) {
    if (ih == null) return -1;  
    <snip...>
    return getSourceLine(ih.getNext()); // StackOverflow here
 }
----

It doesn't seem like this *should* be a side-effect of 
decompiling classes also in the parent loader, but...

In any case, it's definitely worth writing up as a bug.  

  http://dev.eclipse.org/bugs/enter_bug.cgi?product=AspectJ  

(Weaving rt.jar seems like a lot of work to isolate test cases;
is there some other way to do it?  We don't recommend users
weave Java classes.)

Thanks for bringing this up -
Wes

James Howe wrote:
> 
> I'm trying to write some unit tests which invoke code which references some
> Java classes directly.  As such, it is hard to use a Mock object
> implementation to allow the test case to run without accessing the real
> Java class.  I notice that the AspectJ compiler has an option called
> 'injars' whose description seems to imply that aspects can be woven into
> classes found in the 'injar' files.  I figured I would try using ajc on the
> Java rt.jar file to see if I could generate a new version of the jar file
> which had the hooks I needed to support my unit testing.  Unfortunately
> things didn't work out and I'm wondering if this is because of a bug, or
> because I'm trying to do something that ajc isn't really designed to
> handle.  What I did was the following:
> 
> 1. Generate a 'unitTestAspects.jar' file from ajc by compiling my aspect
> and using the -outjar option to put the compiled aspect into a jar.
> 
> 2. Ran the ajc compiler as follows:
> 
>    ajc -injars rt.jar -aspectpath unitTestAspects.jar -outjar rt_aj.jar
> 
> After fixing an OutOfMemory error by increasing the memory available to
> ajc, I ran the compiler once again.  After a period of time the compiler
> aborted with the following:
> 
> java.lang.StackOverflowError
>         at org.aspectj.weaver.bcel.Utility.getSourceLine(Utility.java:436)
>         at org.aspectj.weaver.bcel.Utility.getSourceLine(Utility.java:436)
>         ...
> 
> I'm running with AspectJ 1.1rc2 on Windows XP with JDK 1.4.01.
> 
> Thanks.
> 
> --
> James Howe
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