Run fuzzer unit tests in Kokoro

This CL adjusts the scripts to be able to run AST and regex
fuzzer unit tests in Kokoro. Only clang is supported for now.

Change-Id: Ibc9ebb9cf0dc40f47317abf88875aa738811919d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/61642
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Vasyl Teliman <vasniktel@gmail.com>

fuzzers/tint_ast_fuzzer/CMakeLists.txt

@@ -12,10 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-if (NOT (${CMAKE_CXX_COMPILER_ID} MATCHES Clang))
-    message(FATAL_ERROR "Libfuzzer is supported only on clang")
-endif ()
-
 set(PROTOBUF_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/protobufs/tint_ast_fuzzer.proto)
 
 file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/protobufs)

fuzzers/tint_regex_fuzzer/CMakeLists.txt

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 set(LIBTINT_REGEX_FUZZER_SOURCES
+        util.h
         wgsl_mutator.cc
         wgsl_mutator.h)
 

fuzzers/tint_regex_fuzzer/wgsl_mutator.h

@@ -94,8 +94,8 @@ void ReplaceRegion(size_t idx1,
                    size_t id2_len,
                    std::string& wgsl_code);
 
-/// Replaces an interval of length interval1_len starting at start_index
-/// with the interval interval2.
+/// Replaces an interval of length `length` starting at start_index
+/// with the `replacement_text`.
 /// @param start_index - starting position of the interval to be replaced.
 /// @param length - length of the interval to be replaced.
 /// @param replacement_text - the interval that will be used as a replacement.

kokoro/linux/docker.sh

@@ -91,6 +91,9 @@ if [ "$BUILD_SYSTEM" == "cmake" ]; then
     if [ "$BUILD_TOOLCHAIN" == "clang" ]; then
         using clang-10.0.0
         COMMON_CMAKE_FLAGS+=" -DTINT_BUILD_FUZZERS=1"
+        COMMON_CMAKE_FLAGS+=" -DTINT_BUILD_SPIRV_TOOLS_FUZZER=1"
+        COMMON_CMAKE_FLAGS+=" -DTINT_BUILD_AST_FUZZER=1"
+        COMMON_CMAKE_FLAGS+=" -DTINT_BUILD_REGEX_FUZZER=1"
     elif [ "$BUILD_TOOLCHAIN" == "gcc" ]; then
         using gcc-9
     fi
@@ -126,6 +129,20 @@ if [ "$BUILD_SYSTEM" == "cmake" ]; then
         ./tint_unittests
     hide_cmds
 
+    if [ -f ./tint_ast_fuzzer_unittests ]; then
+        status "Running tint_ast_fuzzer_unittests"
+        show_cmds
+            ./tint_ast_fuzzer_unittests
+        hide_cmds
+    fi
+
+    if [ -f ./tint_regex_fuzzer_unittests ]; then
+        status "Running tint_regex_fuzzer_unittests"
+        show_cmds
+            ./tint_regex_fuzzer_unittests
+        hide_cmds
+    fi
+
     status "Testing test/test-all.sh"
     show_cmds
         ${SRC_DIR}/test/test-all.sh "${BUILD_DIR}/tint" --verbose