java-interp.h (_Jv_InterpFrame::get_pc): Only deduct one when pc_ptr is non-NULL.

* include/java-interp.h (_Jv_InterpFrame::get_pc): Only deduct
        one when pc_ptr is non-NULL.

        * prims.cc (parse_init_args): Enable JVMTI with agentlib
        and agentpath options.

        * testsuite/lib/libjava.exp (exec_gij): Add new addl_flags
        parameter.
        * testsuite/libjava.jvmti/jvmti-interp.exp (gij_jvmti_test_one):
        Pass '-agentlib:dummyagent' when executing gij.
        (gij_jvmti_run): Build dummy JVMTI agent before running tests,
        and remove it when finished.
        * testsuite/libjava.jvmti/dummyagent.c: New file.

From-SVN: r125040

libjava/include/java-interp.h

@@ -466,9 +466,9 @@ public:
     if (pc_ptr == NULL)
       pc = 0;
     else
-      pc = *pc_ptr;
+      pc = *pc_ptr - 1;
     
-    return pc - 1;
+    return pc;
   }
 };