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diff --git a/docs/troubleshooting/sanitizer.rst b/docs/troubleshooting/sanitizer.rst new file mode 100644 index 00000000000..af239943da3 --- /dev/null +++ b/docs/troubleshooting/sanitizer.rst @@ -0,0 +1,46 @@ +.. _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 }" + .... + |