3 files changed, 13 insertions, 11 deletions
diff --git a/lib/dtrace/examples/dist.d b/lib/dtrace/examples/dist.d
index f37c827f14..550e10d363 100644
--- a/lib/dtrace/examples/dist.d
+++ b/lib/dtrace/examples/dist.d
@@ -30,13 +30,13 @@ erlang*:::dist-port_busy
 {
     printf("dist port_busy: node %s, port %s, remote_node %s, blocked pid %s\n",
            copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), copyinstr(arg3));
-    blocked_procs[copyinstr(arg3)] = timestamp;
-}
-
-erlang*:::dist-port_busy
-{
-    printf("dist port_busy: node %s, port %s, remote_node %s, blocked pid %s\n",
-           copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), copyinstr(arg3));
+    /*
+     * For variable use advice, see:
+     *    http://dtrace.org/blogs/brendan/2011/11/25/dtrace-variable-types/
+     *
+     * Howevever, it's quite possible for the blocked events to span
+     * threads, so we'll use globals.
+     */
     blocked_procs[copyinstr(arg3)] = timestamp;
 }
 
diff --git a/lib/dtrace/examples/port1.d b/lib/dtrace/examples/port1.d
index b82e783a14..204abbd3b8 100644
--- a/lib/dtrace/examples/port1.d
+++ b/lib/dtrace/examples/port1.d
@@ -99,10 +99,12 @@ erlang*:::port-command
 
 erlang*:::port-control
 {
-    cmd = driver_map[copyinstr(arg2), arg3];
-    cmd_str = (cmd == 0) ? "unknown" : cmd;
+    /* http://dtrace.org/blogs/brendan/2011/11/25/dtrace-variable-types/ */
+    this->cmd = driver_map[copyinstr(arg2), arg3];
+    this->cmd_str = (this->cmd == 0) ? "unknown" : this->cmd;
     printf("port control pid %s port %s port name %s command %d %s\n",
-	   copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), arg3, cmd_str);
+	   copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), arg3,
+           this->cmd_str);
 }
 
 /* port-exit is fired as a result of port_close() or exit signal */
diff --git a/lib/dtrace/examples/process-scheduling.d b/lib/dtrace/examples/process-scheduling.d
index 9e31da2774..79e9cc598c 100644
--- a/lib/dtrace/examples/process-scheduling.d
+++ b/lib/dtrace/examples/process-scheduling.d
@@ -31,5 +31,5 @@ erlang*:::process-unscheduled
 erlang*:::process-hibernate
 {
     printf("  Hibernate pid %s resume mfa %s\n",
-     copyinstr(arg0), copyinstr(arg1));
+           copyinstr(arg0), copyinstr(arg1));
 }