Augment a comment.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6676

diff --git a/include/pub_tool_mallocfree.h b/include/pub_tool_mallocfree.h
index 70a6f6969d0d4b62df75229504098896a48f3ff9..118f7520f124f4ebb9d964f1f9b68ae0c1fab908 100644 (file)
--- a/include/pub_tool_mallocfree.h
+++ b/include/pub_tool_mallocfree.h
@@ -33,6 +33,8 @@
 #define __PUB_TOOL_MALLOCFREE_H
 
 // These can be for allocating memory used by tools.
+// Nb: the allocators *always succeed* -- they never return NULL (Valgrind
+// will abort if they can't allocate the memory).
 extern void* VG_(malloc)         ( SizeT nbytes );
 extern void  VG_(free)           ( void* p );
 extern void* VG_(calloc)         ( SizeT n, SizeT bytes_per_elem );