[Bug libgcj/28352] New: Interpreter: Stack trace line numbers sometimes missing or incorrect

["mckinlay at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

When the following test case is built with gcj -C, the innermost frame is
missing from the stack trace:

public class Ex {
   void snafu( ) throws Exception {
     throw new Exception();
   }
   void bar( ) throws Exception {
     snafu( );
   }
   void foo( ) throws Exception {
     bar( );
   }
   public static void main( String[] args) throws Exception {
     new Ex( ).foo( );
  }
}


$ gij Ex
Exception in thread "main" java.lang.Exception
   at Ex.snafu(Ex.java)
   at Ex.bar(Ex.java:6)
   at Ex.foo(Ex.java:9)
   at Ex.main(Ex.java:12)

In addition, when built with a different bytecode compiler (ecj), the stack
trace is complete, but has off-by-one line number errors:

$ gij Ex
Exception in thread "main" java.lang.Exception
   at Ex.snafu(Ex.java:3)
   at Ex.bar(Ex.java:7)
   at Ex.foo(Ex.java:10)
   at Ex.main(Ex.java:13)


-- 
           Summary: Interpreter: Stack trace line numbers sometimes missing
                    or incorrect
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mckinlay at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28352