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diff --git a/fluent-bit/cmake/sanitizers-cmake/README.md b/fluent-bit/cmake/sanitizers-cmake/README.md new file mode 100644 index 000000000..b4ca621c3 --- /dev/null +++ b/fluent-bit/cmake/sanitizers-cmake/README.md @@ -0,0 +1,73 @@ +# sanitizers-cmake + + [](https://github.com/arsenm/sanitizers-cmake/issues) +[](LICENSE) + +CMake module to enable sanitizers for binary targets. + + +## Include into your project + +To use [FindSanitizers.cmake](cmake/FindSanitizers.cmake), simply add this repository as git submodule into your own repository +```Shell +mkdir externals +git submodule add git@github.com:arsenm/sanitizers-cmake.git externals/sanitizers-cmake +``` +and adding ```externals/sanitizers-cmake/cmake``` to your ```CMAKE_MODULE_PATH``` +```CMake +set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/externals/sanitizers-cmake/cmake" ${CMAKE_MODULE_PATH}) +``` + +If you don't use git or dislike submodules you can copy the files in [cmake directory](cmake) into your repository. *Be careful and keep updates in mind!* + +Now you can simply run ```find_package``` in your CMake files: +```CMake +find_package(Sanitizers) +``` + + +## Usage + +You can enable the sanitizers with ``SANITIZE_ADDRESS``, ``SANITIZE_MEMORY``, ``SANITIZE_THREAD`` or ``SANITIZE_UNDEFINED`` options in your CMake configuration. You can do this by passing e.g. ``-DSANITIZE_ADDRESS=On`` on your command line or with your graphical interface. + +If sanitizers are supported by your compiler, the specified targets will be build with sanitizer support. If your compiler has no sanitizing capabilities (I asume intel compiler doesn't) you'll get a warning but CMake will continue processing and sanitizing will simply just be ignored. + +#### Compiler issues + +Different compilers may be using different implementations for sanitizers. If you'll try to sanitize targets with C and Fortran code but don't use gcc & gfortran but clang & gfortran, this will cause linking problems. To avoid this, such problems will be detected and sanitizing will be disabled for these targets. + +Even C only targets may cause problems in certain situations. Some problems have been seen with AddressSanitizer for preloading or dynamic linking. In such cases you may try the ``SANITIZE_LINK_STATIC`` to link sanitizers for gcc static. + + + +## Build targets with sanitizer support + +To enable sanitizer support you simply have to add ``add_sanitizers(<TARGET>)`` after defining your target. To provide a sanitizer blacklist file you can use the ``sanitizer_add_blacklist_file(<FILE>)`` function: +```CMake +find_package(Sanitizers) + +sanitizer_add_blacklist_file("blacklist.txt") + +add_executable(some_exe foo.c bar.c) +add_sanitizers(some_exe) + +add_library(some_lib foo.c bar.c) +add_sanitizers(some_lib) +``` + +## Run your application + +The sanitizers check your program, while it's running. In some situations (e.g. LD_PRELOAD your target) it might be required to preload the used AddressSanitizer library first. In this case you may use the ``asan-wrapper`` script defined in ``ASan_WRAPPER`` variable to execute your application with ``${ASan_WRAPPER} myexe arg1 ...``. + + +## Contribute + +Anyone is welcome to contribute. Simply fork this repository, make your changes **in an own branch** and create a pull-request for your change. Please do only one change per pull-request. + +You found a bug? Please fill out an [issue](https://github.com/arsenm/sanitizers-cmake/issues) and include any data to reproduce the bug. + + +#### Contributors + +* [Matt Arsenault](https://github.com/arsenm) +* [Alexander Haase](https://github.com/alehaa) |