diff --git a/service/cmemory.lua b/service/cmemory.lua
index e2c1b4b1..06627ae3 100644
--- a/service/cmemory.lua
+++ b/service/cmemory.lua
@@ -7,4 +7,4 @@ memory.dump()
 print("Total memory:", memory.total())
 print("Total block:", memory.block())
 
-skynet.exit()
+skynet.start(function() skynet.exit() end)
diff --git a/skynet-src/malloc_hook.c b/skynet-src/malloc_hook.c
index 5ace81d5..424513c3 100644
--- a/skynet-src/malloc_hook.c
+++ b/skynet-src/malloc_hook.c
@@ -66,7 +66,7 @@ fill_prefix(char* ptr) {
     uint32_t handle = skynet_current_handle();
     size_t size = je_malloc_usable_size(ptr);
     uint32_t *p = (uint32_t *)(ptr + size - sizeof(uint32_t));
-    *p = handle;
+    memcpy(p, &handle, sizeof(handle));
 
 	update_xmalloc_stat_alloc(handle, size);
     return ptr;
@@ -77,7 +77,8 @@ clean_prefix(char* ptr) {
     uint32_t* rawptr = (uint32_t*)ptr - 1;
     size_t size = je_malloc_usable_size(rawptr);
     uint32_t *p = (uint32_t *)(ptr + size - sizeof(uint32_t));
-    uint32_t handle = *p;
+    uint32_t handle;
+    memcpy(&handle, p, sizeof(handle));
     update_xmalloc_stat_free(handle, size);
     return ptr;
 }