Add fuzzing for transform::CalculateArrayLength

BUG=tint:722

Change-Id: Ide83964646f303c03a9cc780f3828f1816baa288
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/49380
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>

fuzzers/BUILD.gn

@@ -76,6 +76,11 @@ if (build_with_chromium) {
       deps = [ ":tint_fuzzer_common" ]
     }
 
+    fuzzer_test("tint_calculate_array_length_fuzzer") {
+      sources = [ "tint_calculate_array_length_fuzzer.cc" ]
+      deps = [ ":tint_fuzzer_common" ]
+    }
+
     fuzzer_test("tint_emit_vertex_point_size_fuzzer") {
       sources = [ "tint_emit_vertex_point_size_fuzzer.cc" ]
       deps = [ ":tint_fuzzer_common" ]
@@ -163,6 +168,7 @@ if (build_with_chromium) {
         ":tint_all_transforms_fuzzer",
         ":tint_binding_remapper_fuzzer",
         ":tint_bound_array_accessors_fuzzer",
+        ":tint_calculate_array_length_fuzzer",
         ":tint_emit_vertex_point_size_fuzzer",
         ":tint_first_index_offset_fuzzer",
         ":tint_inspector_fuzzer",

fuzzers/CMakeLists.txt

@@ -33,6 +33,7 @@ if (${TINT_BUILD_WGSL_READER} AND ${TINT_BUILD_SPV_WRITER})
   add_tint_fuzzer(tint_all_transforms_fuzzer)
   add_tint_fuzzer(tint_binding_remapper_fuzzer)
   add_tint_fuzzer(tint_bound_array_accessors_fuzzer)
+  add_tint_fuzzer(tint_calculate_array_length_fuzzer)
   add_tint_fuzzer(tint_emit_vertex_point_size_fuzzer)
   add_tint_fuzzer(tint_first_index_offset_fuzzer)
   add_tint_fuzzer(tint_inspector_fuzzer)

fuzzers/tint_all_transforms_fuzzer.cc

@@ -18,9 +18,8 @@ namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-
-  tint::transform::Manager transform_manager;
-  tint::transform::DataMap transform_inputs;
+  transform::Manager transform_manager;
+  transform::DataMap transform_inputs;
 
   if (!ExtractFirstIndexOffsetInputs(&data, &size, &transform_inputs)) {
     return 0;
@@ -30,12 +29,13 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     return 0;
   }
 
-  transform_manager.Add<tint::transform::BoundArrayAccessors>();
-  transform_manager.Add<tint::transform::EmitVertexPointSize>();
-  transform_manager.Add<tint::transform::FirstIndexOffset>();
-  transform_manager.Add<tint::transform::BindingRemapper>();
+  transform_manager.Add<transform::BoundArrayAccessors>();
+  transform_manager.Add<transform::EmitVertexPointSize>();
+  transform_manager.Add<transform::FirstIndexOffset>();
+  transform_manager.Add<transform::BindingRemapper>();
+  transform_manager.Add<transform::CalculateArrayLength>();
 
-  tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
+  fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, std::move(transform_inputs));
 
   return fuzzer.Run(data, size);

fuzzers/tint_calculate_array_length_fuzzer.cc

@@ -0,0 +1,31 @@
+// Copyright 2021 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "fuzzers/tint_common_fuzzer.h"
+
+namespace tint {
+namespace fuzzers {
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  transform::Manager transform_manager;
+  transform_manager.Add<transform::CalculateArrayLength>();
+
+  fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
+  fuzzer.SetTransformManager(&transform_manager, {});
+
+  return fuzzer.Run(data, size);
+}
+
+}  // namespace fuzzers
+}  // namespace tint

include/tint/tint.h

@@ -26,6 +26,7 @@
 #include "src/sem/type_manager.h"
 #include "src/transform/binding_remapper.h"
 #include "src/transform/bound_array_accessors.h"
+#include "src/transform/calculate_array_length.h"
 #include "src/transform/emit_vertex_point_size.h"
 #include "src/transform/first_index_offset.h"
 #include "src/transform/manager.h"