diff -ur valgrind-3.3.1/coregrind/m_debuginfo/debuginfo.c valgrind-3.3.1-sg/coregrind/m_debuginfo/debuginfo.c
--- valgrind-3.3.1/coregrind/m_debuginfo/debuginfo.c	2008-06-01 01:39:04.000000000 +0000
+++ valgrind-3.3.1-sg/coregrind/m_debuginfo/debuginfo.c	2008-10-01 18:56:33.000000000 +0000
@@ -963,6 +963,10 @@
       }
       if (know_srcloc) {
          APPEND(" (");
+	 if (know_dirinfo) {
+	   APPEND(buf_dirname);
+	   APPEND("/");
+	 }
          APPEND(buf_srcloc);
          APPEND(":");
          VG_(sprintf)(ibuf,"%d",lineno);