[abc-users] Compilation error with intertypes when using the abc weaver

From: Henrique RebÍlo <hemr_at_cin.ufpe.br>
Date: Mon, 18 May 2009 15:04:55 -0300

Dear all abc experts,

  I have a problem when I try to compile the following simple hierarchy with
their respectively aspects:

   public interface I {

      public void m(int x);
      }
   }

   public class C implements I{

     public void m(int x) {
     }
   }

  public privileged aspect Aspect_I {

    private boolean I.m$I(int x) {
        return true;
    }
  }

public privileged aspect Aspect_C {

  private boolean C.m$C(int x) {
    return (m$I(x)); --> *probably the root of error*!!!
  }
}

 The error is the following:

 Buildfile:
C:\Java\Eclipse-Workspace\PhD\Experimentos\J2SE\TestABCWeaver\build.xml
 compile-abc-files:
     [java] Exception in thread "main" polyglot.util.InternalCompilerError:
unhandled exception during weaving/optimisation
     [java] at
abc.main.CompileSequence.runSequence(CompileSequence.java:142)
     [java] at abc.main.Main.run(Main.java:406)
     [java] at abc.main.Main.main(Main.java:144)
     [java] Caused by: polyglot.util.InternalCompilerError: Exception while
processing <C: boolean accessor$m$I$6(int)>
     [java] at abc.main.CompileSequence.weave(CompileSequence.java:414)
     [java] at
abc.main.CompileSequence.runSequence(CompileSequence.java:115)
     [java] ... 2 more
     [java] Caused by: java.lang.NullPointerException
     [java] at soot.AbstractValueBox.setValue(AbstractValueBox.java:42)
     [java] at
soot.jimple.internal.JimpleLocalBox.<init>(JimpleLocalBox.java:39)
     [java] at soot.jimple.Jimple.newLocalBox(Jimple.java:850)
     [java] at
soot.jimple.internal.JInterfaceInvokeExpr.<init>(JInterfaceInvokeExpr.java:42)
     [java] at
soot.jimple.Jimple.newInterfaceInvokeExpr(Jimple.java:463)
     [java] at
abc.soot.util.MethodAccessorMethodSource.getBody(MethodAccessorMethodSource.java:100)
     [java] at
soot.SootMethod.getBodyFromMethodSource(SootMethod.java:82)
     [java] at soot.SootMethod.retrieveActiveBody(SootMethod.java:329)
     [java] at abc.main.CompileSequence.weave(CompileSequence.java:410)
     [java] ... 3 more
     [java] Java Result: 1
BUILD SUCCESSFUL
Total time: 6 seconds

 When I compile just the Interface with its aspect, the compilation has no
problem... But when I put the above scenario, the above error occurs. I
tested and I figure out when I call the inherited intertype method m$I(x)
within the intertype declared in C (m$C(int x)), the problem happens!

 Can someone show me how to tackle this problem? The above scenario is just
a illustration, in fact, I use several other applications, but all of them
rely on the above
 scenario!

 It's important to note that such a problem does not occur when I employ the
ajc weaver!!

Regards,

Henrique

-- 
Henrique RebÍlo, Centro de InformŠtica, UFPE
http://www.cin.ufpe.br/~hemr
Received on Mon May 18 2009 - 19:05:00 BST

This archive was generated by hypermail 2.2.0 : Tue May 19 2009 - 12:50:11 BST