diff -r adb6b029b102 Include/pymem.h
--- a/Include/pymem.h	Wed Mar 09 15:02:31 2016 +0100
+++ b/Include/pymem.h	Thu Mar 10 15:28:38 2016 +0100
@@ -16,6 +16,19 @@ PyAPI_FUNC(void *) PyMem_RawMalloc(size_
 PyAPI_FUNC(void *) PyMem_RawCalloc(size_t nelem, size_t elsize);
 PyAPI_FUNC(void *) PyMem_RawRealloc(void *ptr, size_t new_size);
 PyAPI_FUNC(void) PyMem_RawFree(void *ptr);
+
+/* Track an allocated memory block in the tracemalloc module.
+   Return 0 on success, return -1 on error (failed to allocate memory to store
+   the trace).
+
+   The GIL must be held to call this function. */
+PyAPI_FUNC(int) _PyTraceMalloc_Track(void *ptr, size_t size);
+
+/* Untrack an allocated memory block in the tracemalloc module.
+   Do nothing if the block was not tracked.
+
+   The GIL doesn't need to be held to call this function. */
+PyAPI_FUNC(void) _PyTraceMalloc_Untrack(void *ptr);
 #endif
 
 
diff -r adb6b029b102 Modules/_tracemalloc.c
--- a/Modules/_tracemalloc.c	Wed Mar 09 15:02:31 2016 +0100
+++ b/Modules/_tracemalloc.c	Thu Mar 10 15:28:38 2016 +0100
@@ -1395,6 +1395,24 @@ parse_sys_xoptions(PyObject *value)
 }
 
 int
+_PyTraceMalloc_Track(void *ptr, size_t size)
+{
+    int res;
+    TABLES_LOCK();
+    res = tracemalloc_add_trace(ptr, size);
+    TABLES_UNLOCK();
+    return res;
+}
+
+void
+_PyTraceMalloc_Untrack(void *ptr)
+{
+    TABLES_LOCK();
+    tracemalloc_remove_trace(ptr);
+    TABLES_UNLOCK();
+}
+
+int
 _PyTraceMalloc_Init(void)
 {
     char *p;