Poison freed memory objects

[vpp.git] / src / vppinfra / dlmalloc.c

diff --git a/src/vppinfra/dlmalloc.c b/src/vppinfra/dlmalloc.c
index 8acea8b..1bc8f65 100644 (file)
--- a/src/vppinfra/dlmalloc.c
+++ b/src/vppinfra/dlmalloc.c
@@ -1745,6 +1745,7 @@ static int init_mparams(void) {
 #endif
 
     {
+#ifndef DLM_MAGIC_CONSTANT
 #if USE_DEV_RANDOM
       int fd;
       unsigned char buf[sizeof(size_t)];
@@ -1765,6 +1766,9 @@ static int init_mparams(void) {
 #endif
       magic |= (size_t)8U;    /* ensure nonzero */
       magic &= ~(size_t)7U;   /* improve chances of fault for bad values */
+#else
+      magic = DLM_MAGIC_CONSTANT;
+#endif
       /* Until memory modes commonly available, use volatile-write */
       (*(volatile size_t *)(&(mparams.magic))) = magic;
     }
@@ -4133,7 +4137,7 @@ int mspace_enable_disable_trace (mspace msp, int enable)
   mstate ms = (mstate)msp;
   int was_enabled = 0;
 
-  if (use_trace(ms) == 1)
+  if (use_trace(ms))
     was_enabled = 1;
 
   if (enable)
@@ -4267,6 +4271,14 @@ void mspace_put (mspace msp, void *p_arg)
       mheap_put_trace ((u64)p_arg, psize);
     }
 
+#if CLIB_DEBUG > 0
+  /* Poison the object */
+  {
+    size_t psize = mspace_usable_size (object_header);
+    memset (object_header, 0x13, psize);
+  }
+#endif
+
   /* And free it... */
   mspace_free (msp, object_header);
 }