--- a/Makefile.in
+++ b/Makefile.in
@@ -75,16 +75,17 @@ endif
 ifeq (gonk,$(MOZ_WIDGET_TOOLKIT))
 tier_base_dirs += \
   other-licenses/android \
   $(NULL)
 endif
 
 ifdef MOZ_MEMORY
 tier_base_dirs += memory/jemalloc
+tier_base_dirs += memory/build
 endif
 tier_base_dirs += \
   mozglue \
   memory/mozalloc \
   $(NULL)
 endif
 
 ifdef COMPILE_ENVIRONMENT

--- a/allmakefiles.sh
+++ b/allmakefiles.sh
@@ -83,16 +83,17 @@ if [ ! "$LIBXUL_SDK" ]; then
   add_makefiles "
     memory/mozalloc/Makefile
     mozglue/Makefile
     mozglue/build/Makefile
   "
   if [ "$MOZ_MEMORY" ]; then
     add_makefiles "
       memory/jemalloc/Makefile
+      memory/build/Makefile
     "
   fi
   if [ "$MOZ_WIDGET_TOOLKIT" = "android" ]; then
     add_makefiles "
       other-licenses/android/Makefile
       other-licenses/skia-npapi/Makefile
       mozglue/android/Makefile
     "

new file mode 100644
--- /dev/null
+++ b/memory/build/Makefile.in
@@ -0,0 +1,19 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+DEPTH		= ../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = memory
+LIBRARY_NAME = memory
+FORCE_STATIC_LIB = 1
+STLFLAGS =
+
+CSRCS = extraMallocFuncs.c
+
+include $(topsrcdir)/config/rules.mk

new file mode 100644
--- /dev/null
+++ b/memory/build/extraMallocFuncs.c
@@ -0,0 +1,34 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <string.h>
+#include "mozilla/Types.h"
+
+#ifdef ANDROID
+#define wrap(a) __wrap_ ## a
+#endif
+
+#if defined(XP_WIN) || defined(XP_MACOSX)
+#define wrap(a) je_ ## a
+#endif
+
+#ifdef wrap
+void *wrap(malloc)(size_t);
+
+MOZ_EXPORT_API(char *)
+wrap(strndup)(const char *src, size_t len)
+{
+  char* dst = (char*) wrap(malloc)(len + 1);
+  if (dst)
+    strncpy(dst, src, len + 1);
+  return dst; 
+}
+
+MOZ_EXPORT_API(char *)
+wrap(strdup)(const char *src)
+{
+  size_t len = strlen(src);
+  return wrap(strndup)(src, len);
+}
+#endif

--- a/memory/jemalloc/jemalloc.c
+++ b/memory/jemalloc/jemalloc.c
@@ -6211,32 +6211,16 @@ malloc_shutdown()
 #define malloc(a)               wrap(malloc)(a)
 #define memalign(a, b)          wrap(memalign)(a, b)
 #define posix_memalign(a, b, c) wrap(posix_memalign)(a, b, c)
 #define valloc(a)               wrap(valloc)(a)
 #define calloc(a, b)            wrap(calloc)(a, b)
 #define realloc(a, b)           wrap(realloc)(a, b)
 #define free(a)                 wrap(free)(a)
 #define malloc_usable_size(a)   wrap(malloc_usable_size)(a)
-
-void *malloc(size_t size);
-
-char *
-wrap(strndup)(const char *src, size_t len) {
-	char* dst = (char*) malloc(len + 1);
-	if (dst)
-		strncpy(dst, src, len + 1);
-	return dst;
-}
-
-char *
-wrap(strdup)(const char *src) {
-	size_t len = strlen(src);
-	return wrap(strndup)(src, len);
-}
 #endif
 
 /*
  * Even though we compile with MOZ_MEMORY, we may have to dynamically decide
  * not to use jemalloc, as discussed above. However, we call jemalloc
  * functions directly from mozalloc. Since it's pretty dangerous to mix the
  * allocators, we need to call the OSX allocators from the functions below,
  * when osx_use_jemalloc is not (dynamically) set.

--- a/mozglue/build/Makefile.in
+++ b/mozglue/build/Makefile.in
@@ -43,17 +43,18 @@ VPATH		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
 MODULE = mozglue
 LIBRARY_NAME = mozglue
 DIST_INSTALL = 1
 
 ifdef MOZ_MEMORY
-SHARED_LIBRARY_LIBS = $(call EXPAND_LIBNAME_PATH,jemalloc,$(DEPTH)/memory/jemalloc)
+SHARED_LIBRARY_LIBS = $(call EXPAND_LIBNAME_PATH,memory,$(DEPTH)/memory/build)
+SHARED_LIBRARY_LIBS += $(call EXPAND_LIBNAME_PATH,jemalloc,$(DEPTH)/memory/jemalloc)
 else
 # Temporary, until bug 662814 lands
 VISIBILITY_FLAGS =
 CPPSRCS = dummy.cpp
 endif
  
 # Build mozglue as a shared lib on Windows, OSX and Android.
 # If this is ever changed, update MOZ_SHARED_MOZGLUE in browser/installer/Makefile.in