i#1734 Create Dr.Fuzz: fix shadow buffer size calculation bug

- fix a bug on calculating shadow buffer size: size forward alignment before division Review-URL: https://codereview.appspot.com/272300043
DynamoRIO · Nov 2, 2015 · 3f7f925 · 3f7f925
1 parent 8a1bb53
commit 3f7f925
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drmemory/shadow.c b/drmemory/shadow.c
@@ -164,7 +164,7 @@ typedef struct _saved_region_t {
 
 /* extend size to uint boundary if the exact required size is not already aligned */
 #define SIZEOF_SAVED_BUFFER_SHADOW(size) \
-    (ALIGN_FORWARD(((size) / SHADOW_GRANULARITY), SHADOW_GRANULARITY))
+    (ALIGN_FORWARD((size), SHADOW_GRANULARITY) / SHADOW_GRANULARITY)
 
 /* single allocation for saved_region_t and its shadow buffer */
 #define SIZEOF_SAVED_BUFFER(size) \