At the moment the malloc(3) page does not mention what malloc options are actually being enabled if using the S option and it is a shortcut to enable the 3 existing options.
Index: lib/libc/stdlib/malloc.3 =================================================================== RCS file: /home/cvs/src/lib/libc/stdlib/malloc.3,v retrieving revision 1.68 diff -u -p -r1.68 malloc.3 --- lib/libc/stdlib/malloc.3 26 May 2010 08:22:11 -0000 1.68 +++ lib/libc/stdlib/malloc.3 9 Aug 2010 01:06:35 -0000 @@ -275,6 +275,7 @@ This can substantially aid in compacting .\"Consult the source for this one. .It Cm S Enable all options suitable for security auditing. +This results in the the options F, G, and J being enabled. .It Cm X .Dq xmalloc . Rather than return failure, -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
