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authorBenoît Ganne <bganne@cisco.com>2019-11-29 17:28:30 +0100
committerDave Barach <openvpp@barachs.net>2020-01-23 15:53:35 +0000
commit87e64c929fa534ebd29b18f38fc6c15fd216e7e4 (patch)
tree1959e5887edd0393b8d3032ef368b8ce853161d8 /docs/troubleshooting/sanitizer.rst
parent221b3839b197ea1a0d155dd4b635d4fa3d8123b6 (diff)
docs: add AddressSanitizer mini-howto
Type: docs Change-Id: I3bb589d04f15a03166a6d457552ffc316fb02f94 Signed-off-by: Benoît Ganne <bganne@cisco.com>
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+.. _sanitizer:
+
+**************
+Google Sanitizers
+**************
+
+VPP is instrumented to support `Google Sanitizers <https://github.com/google/sanitizers>`_.
+As of today, only `AddressSanitizer <https://github.com/google/sanitizers/wiki/AddressSanitizer>`_
+is supported and only for the heap.
+
+AddressSanitizer
+==============
+
+`AddressSanitizer <https://github.com/google/sanitizers/wiki/AddressSanitizer>`_ (aka ASan) is a memory
+error detector for C/C++. Think Valgrind but much faster.
+
+In order to use it, VPP must be recompiled with ASan support. It is implemented as a cmake
+build option, so all VPP targets should be supported. For example:
+
+.. code-block:: console
+
+ # build a debug image with ASan support:
+ $ make rebuild VPP_EXTRA_CMAKE_ARGS=-DENABLE_SANITIZE_ADDR=ON
+ ....
+
+ # build a release image with ASan support:
+ $ make rebuild-release VPP_EXTRA_CMAKE_ARGS=-DENABLE_SANITIZE_ADDR=ON
+ ....
+
+ # build packages in debug mode with ASan support:
+ $ make pkg-deb-debug VPP_EXTRA_CMAKE_ARGS=-DENABLE_SANITIZE_ADDR=ON
+ ....
+
+ # run GBP plugin tests in debug mode with ASan
+ $ make test-debug TEST=test_gbp VPP_EXTRA_CMAKE_ARGS=-DENABLE_SANITIZE_ADDR=ON
+ ....
+
+Once VPP has been built with ASan support, you can use it as usual. When
+running under a debugger it can be useful to disable LeakSanitizer which is
+not compatible with a debugger and displays spurious warnings at exit:
+
+.. code-block:: console
+
+ $ ASAN_OPTIONS=detect_leaks=0 gdb --args $PWD/build-root/install-vpp_debug-native/vpp/bin/vpp "unix { interactive }"
+ ....
+