3 files changed, 19 insertions, 0 deletions
diff --git a/source4/lib/talloc/talloc.c b/source4/lib/talloc/talloc.c
index da3a2300b0..248af6ea3e 100644
--- a/source4/lib/talloc/talloc.c
+++ b/source4/lib/talloc/talloc.c
@@ -1082,3 +1082,13 @@ void *talloc_autofree_context(void)
 }
 
 
+size_t talloc_get_size(const void *context) {
+	struct talloc_chunk *tc;
+
+	if (context == NULL)
+		return 0;
+
+	tc = talloc_chunk_from_ptr(context);
+
+	return tc->size;
+}
diff --git a/source4/lib/talloc/talloc.h b/source4/lib/talloc/talloc.h
index 8b448f63c5..ab549cf624 100644
--- a/source4/lib/talloc/talloc.h
+++ b/source4/lib/talloc/talloc.h
@@ -126,6 +126,7 @@ void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const
 void *_talloc_realloc_array(const void *ctx, void *ptr, size_t el_size, unsigned count, const char *name);
 void *talloc_realloc_fn(const void *context, void *ptr, size_t size);
 void *talloc_autofree_context(void);
+size_t talloc_get_size(const void *ctx);
 
 #endif
 
diff --git a/source4/lib/talloc/talloc_guide.txt b/source4/lib/talloc/talloc_guide.txt
index 55349ec05b..c23ac77cad 100644
--- a/source4/lib/talloc/talloc_guide.txt
+++ b/source4/lib/talloc/talloc_guide.txt
@@ -559,3 +559,11 @@ talloc_get_type() to do type checking on void* pointers.
 
 It is equivalent to this:
    talloc_set_name_const(ptr, #type)
+
+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+talloc_get_size(const void *ctx);
+
+This function lets you know the amount of memory alloced so far by
+this context. It does NOT account for subcontext memory.
+This can be used to calculate the size of an array.
+