ofproto-dpif: Print register values in trace.

I found this patch useful in tracking down a bug recently.

diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index fdef4afa56e41de48b0beccf7c86b54a93d9e971..a6e1782e492e203b24dad61384279c3acd4dfd7e 100644 (file)
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -4018,6 +4018,20 @@ trace_format_flow(struct ds *result, int level, const char *title,
     ds_put_char(result, '\n');
 }
 
+static void
+trace_format_regs(struct ds *result, int level, const char *title,
+                  struct ofproto_trace *trace)
+{
+    size_t i;
+
+    ds_put_char_multiple(result, '\t', level);
+    ds_put_format(result, "%s:", title);
+    for (i = 0; i < FLOW_N_REGS; i++) {
+        ds_put_format(result, " reg%zu=0x%"PRIx32, i, trace->flow.regs[i]);
+    }
+    ds_put_char(result, '\n');
+}
+
 static void
 trace_resubmit(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
 {
@@ -4026,6 +4040,7 @@ trace_resubmit(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
 
     ds_put_char(result, '\n');
     trace_format_flow(result, ctx->recurse + 1, "Resubmitted flow", trace);
+    trace_format_regs(result, ctx->recurse + 1, "Resubmitted regs", trace);
     trace_format_rule(result, ctx->table_id, ctx->recurse + 1, rule);
 }