a

Author: bratpiorka

.github/workflows/nightly.yml

@@ -36,10 +36,16 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y cmake hwloc libhwloc-dev libnuma-dev libtbb-dev
 
+      - name: Find Clan fuzzer lib
+        run: |
+          CLANG_LIBS_DIR=$(find /usr/lib -name "libclang_rt.fuzzer_no_main*.*" -exec dirname {} \; | head -n 1)
+          echo "CLANG_LIBS_DIR=${CLANG_LIBS_DIR}" >> $GITHUB_ENV
+
       - name: Configure CMake
         run: >
           cmake
           -B ${{github.workspace}}/build
+            -DCMAKE_PREFIX_PATH=${{env.CLANG_LIBS_DIR}}
           -DCMAKE_BUILD_TYPE=${{matrix.build_type}}
           -DCMAKE_C_COMPILER=${{matrix.compiler.c}}
           -DCMAKE_CXX_COMPILER=${{matrix.compiler.cxx}}

CMakeLists.txt

@@ -588,14 +588,11 @@ if(UMF_BUILD_FUZZTESTS
     add_link_options("-fsanitize=fuzzer-no-link")
 
     # We need to find the fuzzer lib in the LLVM installation dir and link it
-    # statically
-    string(REGEX MATCH "^[0-9]+" CMAKE_C_COMPILER_MAJOR_VERSION
-                 ${CMAKE_C_COMPILER_VERSION})
+    # statically as UMF does not define the main function used by fuzzer as 
+    # well as __sancov_* functions
     find_library(
         FUZZER_NO_MAIN_LIB
         NAMES libclang_rt.fuzzer_no_main-x86_64.a
-        PATHS
-            "/usr/lib/llvm-${CMAKE_C_COMPILER_MAJOR_VERSION}/lib/clang/${CMAKE_C_COMPILER_MAJOR_VERSION}/lib/linux/"
     )
 
     if(FUZZER_NO_MAIN_LIB)

README.md

@@ -97,6 +97,18 @@ List of sanitizers available on Windows:
 
 Listed sanitizers can be enabled with appropriate [CMake options](#cmake-standard-options).
 
+### Fuzz testing
+
+To enable fuzz testing, the `UMF_BUILD_FUZZTESTS` CMake configuration flag must
+be set to `ON`. Additionally, ensure that the `CMAKE_PREFIX_PATH` includes the 
+directory containing the Clang libraries required for fuzzing.
+
+Example:
+
+```bash
+cmake -B build -DCMAKE_BUILD_TYPE=Debug -DUMF_BUILD_FUZZTESTS=ON -DCMAKE_PREFIX_PATH=/path/to/clang/libs
+```
+
 ### CMake standard options
 
 List of options provided by CMake: