[ovs-dev] [PATCH 7/8] lib/dynamic-string: add a coverage counter for reloated bytes

[Andy Zhou]

Keep a count of bytes moved due to the realloc() call.

Signed-off-by: Andy Zhou <azhou at nicira.com>
---
 lib/dynamic-string.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/dynamic-string.c b/lib/dynamic-string.c
index a6c8f6c..89ead08 100644
--- a/lib/dynamic-string.c
+++ b/lib/dynamic-string.c
@@ -15,6 +15,7 @@
  */
 
 #include <config.h>
+#include "coverage.h"
 #include "dynamic-string.h"
 #include <inttypes.h>
 #include <stdlib.h>
@@ -23,6 +24,8 @@
 #include "timeval.h"
 #include "util.h"
 
+COVERAGE_DEFINE(ds_bytes_relocated);
+
 /* Initializes 'ds' as an empty string buffer. */
 void
 ds_init(struct ds *ds)
@@ -58,9 +61,15 @@ void
 ds_reserve(struct ds *ds, size_t min_length)
 {
     if (min_length > ds->allocated || !ds->string) {
+        char *string_ = ds->string;
+        size_t size_ = ds->allocated;
+
         ds->allocated += MAX(min_length, ds->allocated);
         ds->allocated = MAX(8, ds->allocated);
         ds->string = xrealloc(ds->string, ds->allocated + 1);
+        if (string_ && (string_ != ds->string)) {
+            COVERAGE_ADD(ds_bytes_relocated, size_);
+        }
     }
 }
 
-- 
1.9.1