Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Signed-off-by: Jonathan Corbet <corbet@xxxxxxx>
---
Documentation/dev-tools/tools.rst | 1 +
Documentation/{ubsan.txt => dev-tools/ubsan.rst} | 42 +++++++++++++-----------
2 files changed, 24 insertions(+), 19 deletions(-)
rename Documentation/{ubsan.txt => dev-tools/ubsan.rst} (78%)
diff --git a/Documentation/dev-tools/tools.rst b/Documentation/dev-tools/tools.rst
index 0500e65..2d11297 100644
--- a/Documentation/dev-tools/tools.rst
+++ b/Documentation/dev-tools/tools.rst
@@ -19,3 +19,4 @@ whole; patches welcome!
kcov
gcov
kasan
+ ubsan
diff --git a/Documentation/ubsan.txt b/Documentation/dev-tools/ubsan.rst
similarity index 78%
rename from Documentation/ubsan.txt
rename to Documentation/dev-tools/ubsan.rst
index f58215e..655e6b6 100644
--- a/Documentation/ubsan.txt
+++ b/Documentation/dev-tools/ubsan.rst
@@ -1,7 +1,5 @@
-Undefined Behavior Sanitizer - UBSAN
-
-Overview
---------
+The Undefined Behavior Sanitizer - UBSAN
+========================================
UBSAN is a runtime undefined behaviour checker.
@@ -10,11 +8,13 @@ Compiler inserts code that perform certain kinds of checks before operations
that may cause UB. If check fails (i.e. UB detected) __ubsan_handle_*
function called to print error message.
-GCC has that feature since 4.9.x [1] (see -fsanitize=undefined option and
-its suboptions). GCC 5.x has more checkers implemented [2].
+GCC has that feature since 4.9.x [1_] (see ``-fsanitize=undefined`` option and
+its suboptions). GCC 5.x has more checkers implemented [2_].
Report example
----------------
+--------------
+
+::
================================================================================
UBSAN: Undefined behaviour in ../include/linux/bitops.h:110:33
@@ -47,29 +47,33 @@ Report example
Usage
-----
-To enable UBSAN configure kernel with:
+To enable UBSAN configure kernel with::
CONFIG_UBSAN=y
-and to check the entire kernel:
+and to check the entire kernel::
CONFIG_UBSAN_SANITIZE_ALL=y
To enable instrumentation for specific files or directories, add a line
similar to the following to the respective kernel Makefile:
- For a single file (e.g. main.o):
- UBSAN_SANITIZE_main.o := y
+- For a single file (e.g. main.o)::
+
+ UBSAN_SANITIZE_main.o := y
- For all files in one directory:
- UBSAN_SANITIZE := y
+- For all files in one directory::
+
+ UBSAN_SANITIZE := y
To exclude files from being instrumented even if
-CONFIG_UBSAN_SANITIZE_ALL=y, use:
+``CONFIG_UBSAN_SANITIZE_ALL=y``, use::
+
+ UBSAN_SANITIZE_main.o := n
+
+and::
- UBSAN_SANITIZE_main.o := n
- and:
- UBSAN_SANITIZE := n
+ UBSAN_SANITIZE := n
Detection of unaligned accesses controlled through the separate option -
CONFIG_UBSAN_ALIGNMENT. It's off by default on architectures that support
@@ -80,5 +84,5 @@ reports.
References
----------
-[1] - https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/Debugging-Options.html
-[2] - https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html
+.. _1: https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/Debugging-Options.html
+.. _2: https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html
--
2.9.2
--
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