gcc/

[thirdparty/gcc.git] / gcc / doc / invoke.texi

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b4e0231602c67512d05a56a2b1f351112d2f1448..b8c8083daa7209bd7ea27159a4c718f02c63b1fd 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -11034,6 +11034,28 @@ Enable AddressSanitizer for Linux kernel.
 See @uref{https://github.com/google/kasan/wiki} for more details.
 The option cannot be combined with @option{-fcheck-pointer-bounds}.
 
+@item -fsanitize=pointer-compare
+@opindex fsanitize=pointer-compare
+Instrument comparison operation (<, <=, >, >=) with pointer operands.
+The option must be combined with either @option{-fsanitize=kernel-address} or
+@option{-fsanitize=address}
+The option cannot be combined with @option{-fsanitize=thread}
+and/or @option{-fcheck-pointer-bounds}.
+Note: By default the check is disabled at run time.  To enable it,
+add @code{detect_invalid_pointer_pairs=1} to the environment variable
+@env{ASAN_OPTIONS}.
+
+@item -fsanitize=pointer-subtract
+@opindex fsanitize=pointer-subtract
+Instrument subtraction with pointer operands.
+The option must be combined with either @option{-fsanitize=kernel-address} or
+@option{-fsanitize=address}
+The option cannot be combined with @option{-fsanitize=thread}
+and/or @option{-fcheck-pointer-bounds}.
+Note: By default the check is disabled at run time.  To enable it,
+add @code{detect_invalid_pointer_pairs=1} to the environment variable
+@env{ASAN_OPTIONS}.
+
 @item -fsanitize=thread
 @opindex fsanitize=thread
 Enable ThreadSanitizer, a fast data race detector.