Changeset 1333 for pjproject/trunk/pjlib/src/pj/pool_policy_malloc.c

Timestamp:

Jun 1, 2007 7:26:21 AM (17 years ago)

Author:

bennylp

Message:

Implement ticket #314: Added PJ_SAFE_POOL configuration in PJLIB to track down memory corruptions

File:

• pjproject/trunk/pjlib/src/pj/pool_policy_malloc.c (modified) (3 diffs)

pjproject/trunk/pjlib/src/pj/pool_policy_malloc.c

@@ -27 +27 @@
  * This file contains pool default policy definition and implementation.
  */
+#include "pool_signature.h"
 
 
@@ -42 +43 @@
     }
 
-    p = malloc(size);
+    p = malloc(size+(SIG_SIZE << 1));
 
     if (p == NULL) {
         if (factory->on_block_free) 
             factory->on_block_free(factory, size);
+    } else {
+        /* Apply signature when PJ_SAFE_POOL is set. It will move
+         * "p" pointer forward.
+         */
+        APPLY_SIG(p, size);
     }
 
@@ -59 +65 @@
     if (factory->on_block_free) 
         factory->on_block_free(factory, size);
+
+    /* Check and remove signature when PJ_SAFE_POOL is set. It will
+     * move "mem" pointer backward.
+     */
+    REMOVE_SIG(mem, size);
+
+    /* Note that when PJ_SAFE_POOL is set, the actual size of the block
+     * is size + SIG_SIZE*2.
+     */
 
     free(mem);