Around advice is inlined by the weaver by default, which means that breakpoints set in the declaring aspect are not detected. To disable inlining select Window > Preferences > AspectJ > Compiler. Select the Advanced tab, then check No inline and click OK to apply.
Launching a program with the main method in a class
Launching a program with the main method in an aspect
Launching a program with an aspectpath or an outjar
Debugging a program