--- a/hotspot/src/share/vm/services/memTracker.hpp	Mon Sep 17 11:46:19 2012 +0200
+++ b/hotspot/src/share/vm/services/memTracker.hpp	Mon Sep 17 10:20:04 2012 -0400
@@ -185,6 +185,7 @@
   static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
                             address pc = 0, Thread* thread = NULL) {
     if (NMT_CAN_TRACK(flags)) {
+      assert(size > 0, "Sanity check");
       create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread);
     }
   }
@@ -198,6 +199,7 @@
   static inline void record_realloc(address old_addr, address new_addr, size_t size,
        MEMFLAGS flags, address pc = 0, Thread* thread = NULL) {
     if (is_on()) {
+      assert(size > 0, "Sanity check");
       record_free(old_addr, flags, thread);
       record_malloc(new_addr, size, flags, pc, thread);
     }
@@ -208,6 +210,7 @@
     // we add a positive offset to arena address, so we can have arena size record
     // sorted after arena record
     if (is_on() && !UseMallocOnly) {
+      assert(addr != NULL, "Sanity check");
       create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size,
         0, NULL);
     }
@@ -217,7 +220,7 @@
   static inline void record_virtual_memory_reserve(address addr, size_t size,
                             address pc = 0, Thread* thread = NULL) {
     if (is_on()) {
-      assert(size > 0, "reserve szero size");
+      assert(size > 0, "Sanity check");
       create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(),
                            size, pc, thread);
     }
@@ -248,6 +251,7 @@
   static inline void record_virtual_memory_commit(address addr, size_t size,
                             address pc = 0, Thread* thread = NULL) {
     if (is_on()) {
+      assert(size > 0, "Sanity check");
       create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(),
                            size, DEBUG_CALLER_PC, thread);
     }
@@ -257,6 +261,7 @@
   static inline void record_virtual_memory_uncommit(address addr, size_t size,
                             Thread* thread = NULL) {
     if (is_on()) {
+      assert(size > 0, "Sanity check");
       create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(),
                            size, DEBUG_CALLER_PC, thread);
     }
@@ -266,6 +271,7 @@
   static inline void record_virtual_memory_release(address addr, size_t size,
                             Thread* thread = NULL) {
     if (is_on()) {
+      assert(size > 0, "Sanity check");
       create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(),
                            size, DEBUG_CALLER_PC, thread);
     }