[#3732] Switch Clusterfuzzlite to Meson

.clusterfuzzlite/build.sh

@@ -1,6 +1,9 @@
-#!/bin/bash -eu
+#!/bin/bash
 
-# https://reports.kea.isc.org/new-fuzzer.html
+# SC2156 (warning): Injecting filenames is fragile and insecure. Use parameters.
+# shellcheck disable=SC2156
+
+set -eu
 
 script_path="$(dirname "$(readlink -f "${0}")")"
 cd "${script_path}/.."
@@ -13,43 +16,43 @@ install_kea() {
   export PATH="/usr/lib/ccache:$PATH"
   export KEA_BUILD_DIR="${KEA_BUILD_DIR-/builds/isc-projects/kea}"
 
-  cxxflags=
-  autoreconf -i
-  if test "${SANITIZER}" = 'none'; then
-    cxxflags="${cxxflags} -fno-sanitize=all"
-    enable_fuzzing='--enable-fuzzing'
-  else
-    cxxflags="${cxxflags} -fsanitize=${SANITIZER}"
-    enable_fuzzing='--enable-fuzzing=ci'
-  fi
+  cxxflags='-gdwarf-4'
+  export CXX='g++'
   export CXXFLAGS="${cxxflags}"
-  export LDFLAGS='-L/usr/lib/gcc/x86_64-linux-gnu/9 -lstdc++fs'
-  if ! ./configure --enable-boost-headers-only --prefix='/opt/kea' "${enable_fuzzing}" --with-gtest=/usr/src/googletest/googletest; then
-    printf './configure failed. Here is config.log:\n'
-    cat config.log
+  export LDFLAGS="${cxxflags}"
+  if ! meson setup build --prefix "${OUT}" -D b_lundef=false -D "b_sanitize=${SANITIZER}" -D fuzz=enabled -D tests=enabled; then
+    printf 'meson setup failed. Here is meson-log.txt:\n'
+    cat build/meson-logs/meson-log.txt
     return 1
   fi
-  make -j "$(nproc)"
-  make install
+  meson compile -C build
+  meson install -C build
+
+  echo "${OUT}/lib" | sudo tee /etc/ld.so.conf.d/kea.conf
+  echo "${OUT}/lib/x86_64-linux-gnu" | sudo tee /etc/ld.so.conf.d/kea.conf
+  ldconfig
+  sudo ldconfig
 
   # Copy internal libraries.
-  # SC2156 (warning): Injecting filenames is fragile and insecure. Use parameters.
-  # shellcheck disable=SC2156
-  find "/opt/kea/lib" -mindepth 1 -maxdepth 1 -not -type d -exec sh -c "cp {} ${KEA_BUILD_DIR}" ';'
+  find "${OUT}/lib/" -name 'libkea-*.so*'
+  find "${OUT}/lib/" -name 'libkea-*.so*' -exec sh -c "cp {} ${KEA_BUILD_DIR}" ';'
+  find "${OUT}/lib/" -name 'libkea-*.so*' -exec sh -c "cp {} ${OUT}" ';'
+  find "${OUT}/lib/" -name 'libkea-*.so*' -exec sh -c "cp {} /lib/x86_64-linux-gnu/" ';'
 
   # Copy the binaries.
   for fuzzer in fuzz_config_kea_dhcp4 fuzz_http_endpoint_kea_dhcp4 fuzz_packets_kea_dhcp4 fuzz_unix_socket_kea_dhcp4 \
                 fuzz_config_kea_dhcp6 fuzz_http_endpoint_kea_dhcp6 fuzz_packets_kea_dhcp6 fuzz_unix_socket_kea_dhcp6 \
       ; do
-    cp "/opt/kea/sbin/${fuzzer}" "${OUT}/${fuzzer}"
-    # copy all required libraries
-    echo "ldd ${OUT}/${fuzzer}: "
+    cp "${OUT}/sbin/${fuzzer}" "${OUT}/${fuzzer}"
+
+    # Display some information for debugging.
     ldd "${OUT}/${fuzzer}"
-    EXTENDED_PATH=$(readelf -d "${OUT}/${fuzzer}" | grep 'R.*PATH' | cut -d '[' -f 2 | cut -d ']' -f 1)
-    patchelf --set-rpath "/usr/lib/x86_64-linux-gnu:/lib/x86_64-linux-gnu:${EXTENDED_PATH}" "${OUT}/${fuzzer}"
-    readelf -d "${OUT}/${fuzzer}" | grep 'R.*PATH' || true
+    readelf -d "${OUT}/${fuzzer}" | grep -Ei 'R.*PATH' || true
+
+    # Copy all required libraries, although we want to specifically target external libraries.
     for i in $(ldd "${OUT}/${fuzzer}" | cut -f 2 | cut -d ' ' -f 3); do
       cp "${i}" "${KEA_BUILD_DIR}"
+      cp "${i}" "${OUT}"
     done
   done
 }

compiler-checks/fuzzing-with-clusterfuzzlite.cc

@@ -1,3 +1,9 @@
+#include <cstdlib>
+
 int main() {
-    return 1;
+    if (getenv("CIFUZZ") && getenv("FUZZING_ENGINE") && getenv("FUZZING_LANGUAGE")) {
+        return 0;
+    } else {
+        return 1;
+    }
 }

fuzz/meson.build

@@ -49,16 +49,11 @@ install_input = configure_file(
 )
 meson.add_install_script(install_input)
 
-fuzz_sources = ['fuzz.cc', 'fuzz.h']
+fuzz_sources = ['fuzz.cc', 'fuzz.h', 'main.cc']
 cpp_flags = [
     f'-DKEA_LFC_INSTALLATION="@KEA_LFC_INSTALLED@"',
     f'-DKEA_LFC_SOURCES="@KEA_LFC_BUILT@"',
 ]
-if FUZZING_WITH_CLUSTERFUZZLITE
-    cpp_flags += ['-fsanitize=fuzzer', '-gdwarf-4']
-else
-    fuzz_sources += ['main.cc']
-endif
 
 includes = [include_directories('.')] + INCLUDES
 

meson.build

@@ -460,7 +460,6 @@ if MYSQL_DEP.found()
     conf_data.set('HAVE_MYSQL_GET_OPTION', result.returncode() == 0)
 endif
 
-# TODO: implement when integrating with CI
 result = cpp.run(
     fs.read('compiler-checks/fuzzing-with-clusterfuzzlite.cc'),
     name: 'FUZZING_WITH_CLUSTERFUZZLITE',