Add '-tint_dump_input=true/false' to fuzzers to dump input spv/wgsl to a file

When enabled, the input spv/wgsl is dumped to a file named
"fuzzer_input_<hash of file>.spv/wgsl".

Note that this adds the setting to all the fuzzers in the root of
fuzzers/, but not to tint_ast_fuzzer, tint_regex_fuzzer, nor
tint_spirv_tools_fuzzer as they currently to their own CLI parsing.

Change-Id: I268ffd842b94be1cbb78eb199d5662712ff71053
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/61000
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>

fuzzers/BUILD.gn

@@ -99,10 +99,20 @@ if (build_with_chromium) {
     ]
   }
 
+  source_set("tint_fuzzer_common_with_init") {
+    public_deps = [ ":tint_fuzzer_common" ]
+
+    sources = [
+      "cli.cc",
+      "cli.h",
+      "tint_init_fuzzer.cc",
+      "tint_init_fuzzer.h",
+    ]
+  }
   if (tint_build_wgsl_reader) {
     fuzzer_test("tint_wgsl_reader_fuzzer") {
       sources = [ "tint_wgsl_reader_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -130,7 +140,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_wgsl_reader_wgsl_writer_fuzzer") {
       sources = [ "tint_wgsl_reader_wgsl_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -140,7 +150,7 @@ if (build_with_chromium) {
   if (tint_build_wgsl_reader && tint_build_spv_writer) {
     fuzzer_test("tint_all_transforms_fuzzer") {
       sources = [ "tint_all_transforms_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -157,7 +167,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_binding_remapper_fuzzer") {
       sources = [ "tint_binding_remapper_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -165,7 +175,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_first_index_offset_fuzzer") {
       sources = [ "tint_first_index_offset_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -173,7 +183,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_inspector_fuzzer") {
       sources = [ "tint_inspector_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -190,7 +200,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_renamer_fuzzer") {
       sources = [ "tint_renamer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -198,7 +208,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_robustness_fuzzer") {
       sources = [ "tint_robustness_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -206,7 +216,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_single_entry_point_fuzzer") {
       sources = [ "tint_single_entry_point_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -214,7 +224,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_vertex_pulling_fuzzer") {
       sources = [ "tint_vertex_pulling_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -222,7 +232,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_wgsl_reader_spv_writer_fuzzer") {
       sources = [ "tint_wgsl_reader_spv_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -250,7 +260,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_wgsl_reader_hlsl_writer_fuzzer") {
       sources = [ "tint_wgsl_reader_hlsl_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -278,7 +288,7 @@ if (build_with_chromium) {
 
     fuzzer_test("tint_wgsl_reader_msl_writer_fuzzer") {
       sources = [ "tint_wgsl_reader_msl_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]
@@ -288,7 +298,7 @@ if (build_with_chromium) {
   if (tint_build_spv_reader) {
     fuzzer_test("tint_spv_reader_fuzzer") {
       sources = [ "tint_spv_reader_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       seed_corpus = fuzzer_corpus_spirv_dir
       seed_corpus_deps = [ ":tint_generate_spirv_corpus" ]
     }
@@ -297,7 +307,7 @@ if (build_with_chromium) {
   if (tint_build_spv_reader && tint_build_wgsl_writer) {
     fuzzer_test("tint_spv_reader_wgsl_writer_fuzzer") {
       sources = [ "tint_spv_reader_wgsl_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       seed_corpus = fuzzer_corpus_spirv_dir
       seed_corpus_deps = [ ":tint_generate_spirv_corpus" ]
     }
@@ -314,7 +324,7 @@ if (build_with_chromium) {
   if (tint_build_spv_reader && tint_build_spv_writer) {
     fuzzer_test("tint_spv_reader_spv_writer_fuzzer") {
       sources = [ "tint_spv_reader_spv_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       seed_corpus = fuzzer_corpus_spirv_dir
       seed_corpus_deps = [ ":tint_generate_spirv_corpus" ]
     }
@@ -331,7 +341,7 @@ if (build_with_chromium) {
   if (tint_build_spv_reader && tint_build_hlsl_writer) {
     fuzzer_test("tint_spv_reader_hlsl_writer_fuzzer") {
       sources = [ "tint_spv_reader_hlsl_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       seed_corpus = fuzzer_corpus_spirv_dir
       seed_corpus_deps = [ ":tint_generate_spirv_corpus" ]
     }
@@ -348,7 +358,7 @@ if (build_with_chromium) {
   if (tint_build_spv_reader && tint_build_msl_writer) {
     fuzzer_test("tint_spv_reader_msl_writer_fuzzer") {
       sources = [ "tint_spv_reader_msl_writer_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       seed_corpus = fuzzer_corpus_spirv_dir
       seed_corpus_deps = [ ":tint_generate_spirv_corpus" ]
     }
@@ -365,7 +375,7 @@ if (build_with_chromium) {
   if (tint_build_wgsl_reader && tint_build_wgsl_writer) {
     fuzzer_test("tint_ast_clone_fuzzer") {
       sources = [ "tint_ast_clone_fuzzer.cc" ]
-      deps = [ ":tint_fuzzer_common" ]
+      deps = [ ":tint_fuzzer_common_with_init" ]
       dict = "dictionary.txt"
       seed_corpus = fuzzer_corpus_wgsl_dir
       seed_corpus_deps = [ ":tint_generate_wgsl_corpus" ]

fuzzers/CMakeLists.txt

@@ -15,7 +15,13 @@
 function(add_tint_fuzzer NAME)
   add_executable(${NAME}
     ${NAME}.cc
-    tint_common_fuzzer.cc)
+    cli.cc
+    cli.h
+    tint_common_fuzzer.cc
+    tint_common_fuzzer.h
+    tint_init_fuzzer.cc
+    tint_init_fuzzer.h
+    )
   target_link_libraries(${NAME} libtint-fuzz)
   tint_default_compile_options(${NAME})
   target_compile_options(${NAME} PRIVATE -Wno-missing-prototypes)

fuzzers/cli.cc

@@ -0,0 +1,107 @@
+// 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/cli.h"
+
+#include <cstring>
+#include <iostream>
+#include <limits>
+#include <sstream>
+#include <string>
+#include <utility>
+
+namespace tint {
+namespace fuzzers {
+namespace {
+
+const char* const kHelpMessage = R"(
+This is a fuzzer for the Tint compiler that works by mutating the AST.
+
+Below is a list of all supported parameters for this fuzzer. You may want to
+run it with -help=1 to check out libfuzzer parameters.
+
+  -tint_dump_input=
+                       If `true`, the fuzzer will dump input data to a file with
+                       name tint_input_<hash>.spv/wgsl, where the hash is the hash
+                       of the input data.
+
+  -tint_help
+                       Show this message. Note that there is also a -help=1
+                       parameter that will display libfuzzer's help message.
+)";
+
+bool HasPrefix(const char* str, const char* prefix) {
+  return strncmp(str, prefix, strlen(prefix)) == 0;
+}
+
+[[noreturn]] void InvalidParam(const char* param) {
+  std::cout << "Invalid value for " << param << std::endl;
+  std::cout << kHelpMessage << std::endl;
+  exit(1);
+}
+
+bool ParseBool(const char* value, bool* out) {
+  if (!strcmp(value, "true")) {
+    *out = true;
+  } else if (!strcmp(value, "false")) {
+    *out = false;
+  } else {
+    return false;
+  }
+  return true;
+}
+
+}  // namespace
+
+CliParams ParseCliParams(int* argc, char** argv) {
+  CliParams cli_params;
+  auto help = false;
+
+  for (int i = *argc - 1; i > 0; --i) {
+    auto param = argv[i];
+    auto recognized_parameter = true;
+
+    if (HasPrefix(param, "-tint_dump_input=")) {
+      if (!ParseBool(param + sizeof("-tint_dump_input=") - 1,
+                     &cli_params.dump_input)) {
+        InvalidParam(param);
+      }
+    } else if (!strcmp(param, "-tint_help")) {
+      help = true;
+    } else {
+      recognized_parameter = false;
+    }
+
+    if (recognized_parameter) {
+      // Remove the recognized parameter from the list of all parameters by
+      // swapping it with the last one. This will suppress warnings in the
+      // libFuzzer about unrecognized parameters. By default, libFuzzer thinks
+      // that all user-defined parameters start with two dashes. However, we are
+      // forced to use a single one to make the fuzzer compatible with the
+      // ClusterFuzz.
+      std::swap(argv[i], argv[*argc - 1]);
+      *argc -= 1;
+    }
+  }
+
+  if (help) {
+    std::cout << kHelpMessage << std::endl;
+    exit(0);
+  }
+
+  return cli_params;
+}
+
+}  // namespace fuzzers
+}  // namespace tint

fuzzers/cli.h

@@ -0,0 +1,43 @@
+// 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.
+
+#ifndef FUZZERS_CLI_H_
+#define FUZZERS_CLI_H_
+
+#include <cstdint>
+
+namespace tint {
+namespace fuzzers {
+
+/// CLI parameters accepted by the fuzzer. Type -tint_help in the CLI to see the
+/// help message
+struct CliParams {
+  bool dump_input = false;
+};
+
+/// @brief Parses CLI parameters.
+///
+/// This function will exit the process with non-zero return code if some
+/// parameters are invalid. This function will remove recognized parameters from
+/// `argv` and adjust `argc` accordingly.
+///
+/// @param argc - the total number of parameters.
+/// @param argv - array of all CLI parameters.
+/// @return parsed parameters.
+CliParams ParseCliParams(int* argc, char** argv);
+
+}  // namespace fuzzers
+}  // namespace tint
+
+#endif  // FUZZERS_CLI_H_

fuzzers/tint_all_transforms_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -50,6 +51,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
     fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
     fuzzer.SetTransformManager(&(config.manager), std::move(config.inputs));
+    fuzzer.SetDumpInput(GetCliParams().dump_input);
 
     fuzzer.Run(config.reader.data(), config.reader.size());
   }
@@ -64,6 +66,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
     fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kHLSL);
     fuzzer.SetTransformManager(&config.manager, std::move(config.inputs));
+    fuzzer.SetDumpInput(GetCliParams().dump_input);
 
     fuzzer.Run(config.reader.data(), config.reader.size());
   }
@@ -79,6 +82,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
     fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kMSL);
     fuzzer.SetTransformManager(&config.manager, std::move(config.inputs));
+    fuzzer.SetDumpInput(GetCliParams().dump_input);
 
     fuzzer.Run(config.reader.data(), config.reader.size());
   }
@@ -93,6 +97,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
     fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
     fuzzer.SetTransformManager(&config.manager, std::move(config.inputs));
+    fuzzer.SetDumpInput(GetCliParams().dump_input);
 
     fuzzer.Run(config.reader.data(), config.reader.size());
   }

fuzzers/tint_binding_remapper_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -31,6 +32,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, std::move(transform_inputs));
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(r.data(), r.size());
 }

fuzzers/tint_common_fuzzer.cc

@@ -15,6 +15,7 @@
 #include "fuzzers/tint_common_fuzzer.h"
 
 #include <cstring>
+#include <fstream>
 #include <memory>
 #include <sstream>
 #include <string>
@@ -28,6 +29,7 @@
 #include "src/ast/module.h"
 #include "src/diagnostic/formatter.h"
 #include "src/program.h"
+#include "src/utils/hash.h"
 
 namespace tint {
 namespace fuzzers {
@@ -202,6 +204,17 @@ int CommonFuzzer::Run(const uint8_t* data, size_t size) {
 
 #endif  // TINT_BUILD_SPV_READER
 
+#if TINT_BUILD_WGSL_READER || TINT_BUILD_SPV_READER
+  auto dump_input_data = [&](auto& content, const char* extension) {
+    size_t hash = utils::Hash(content);
+    auto filename = "fuzzer_input_" + std::to_string(hash) + extension;  //
+    std::ofstream fout(filename, std::ios::binary);
+    fout.write(reinterpret_cast<const char*>(data),
+               static_cast<std::streamsize>(size));
+    std::cout << "Dumped input data to " << filename << std::endl;
+  };
+#endif
+
   switch (input_) {
 #if TINT_BUILD_WGSL_READER
     case InputFormat::kWGSL: {
@@ -210,6 +223,9 @@ int CommonFuzzer::Run(const uint8_t* data, size_t size) {
       diagnostics_ = {};
       std::string str(reinterpret_cast<const char*>(data), size);
       file_ = std::make_unique<Source::File>("test.wgsl", str);
+      if (dump_input_) {
+        dump_input_data(str, ".wgsl");
+      }
       program = reader::wgsl::Parse(file_.get());
       break;
     }
@@ -225,6 +241,9 @@ int CommonFuzzer::Run(const uint8_t* data, size_t size) {
       if (spirv_input.empty()) {
         return 0;
       }
+      if (dump_input_) {
+        dump_input_data(spirv_input, ".spv");
+      }
       program = reader::spirv::Parse(spirv_input);
       break;
     }

fuzzers/tint_common_fuzzer.h

@@ -121,6 +121,8 @@ class CommonFuzzer {
   }
   void EnableInspector() { inspector_enabled_ = true; }
 
+  void SetDumpInput(bool enabled) { dump_input_ = enabled; }
+
   int Run(const uint8_t* data, size_t size);
 
   const tint::diag::List& Diagnostics() const { return diagnostics_; }
@@ -159,6 +161,7 @@ class CommonFuzzer {
   transform::Manager* transform_manager_;
   transform::DataMap transform_inputs_;
   bool inspector_enabled_;
+  bool dump_input_ = false;
   tint::diag::List diagnostics_;
 
   std::vector<uint32_t> generated_spirv_;

fuzzers/tint_first_index_offset_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -31,6 +32,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, std::move(transform_inputs));
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(r.data(), r.size());
 }

fuzzers/tint_init_fuzzer.cc

@@ -0,0 +1,35 @@
+// 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_init_fuzzer.h"
+#include "fuzzers/cli.h"
+
+namespace tint {
+namespace fuzzers {
+
+namespace {
+CliParams cli_params;
+}
+
+const CliParams& GetCliParams() {
+  return cli_params;
+}
+
+extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {
+  cli_params = ParseCliParams(argc, *argv);
+  return 0;
+}
+
+}  // namespace fuzzers
+}  // namespace tint

fuzzers/tint_init_fuzzer.h

@@ -0,0 +1,29 @@
+// 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.
+
+#ifndef FUZZERS_TINT_INIT_FUZZER_H_
+#define FUZZERS_TINT_INIT_FUZZER_H_
+
+#include "fuzzers/cli.h"
+
+namespace tint {
+namespace fuzzers {
+
+/// Returns the common CliParams parsed and populated by LLVMFuzzerInitialize()
+const CliParams& GetCliParams();
+
+}  // namespace fuzzers
+}  // namespace tint
+
+#endif  // FUZZERS_TINT_INIT_FUZZER_H_

fuzzers/tint_inspector_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -20,6 +21,7 @@ namespace fuzzers {
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.EnableInspector();
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(data, size);
 }

fuzzers/tint_renamer_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -23,6 +24,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, {});
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(data, size);
 }

fuzzers/tint_robustness_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -23,6 +24,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, {});
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(data, size);
 }

fuzzers/tint_single_entry_point_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -31,6 +32,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, std::move(transform_inputs));
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(r.data(), r.size());
 }

fuzzers/tint_spv_reader_fuzzer.cc

@@ -15,12 +15,14 @@
 #include <vector>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kSpv, OutputFormat::kNone);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(data, size);
 }
 

fuzzers/tint_spv_reader_hlsl_writer_fuzzer.cc

@@ -15,12 +15,14 @@
 #include <vector>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kSpv, OutputFormat::kHLSL);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(data, size);
 }
 

fuzzers/tint_spv_reader_msl_writer_fuzzer.cc

@@ -15,6 +15,7 @@
 #include <vector>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -25,6 +26,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   ExtractMslOptions(&reader, &options);
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kSpv, OutputFormat::kMSL);
   fuzzer.SetOptionsMsl(options);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(reader.data(), reader.size());
 }
 

fuzzers/tint_spv_reader_spv_writer_fuzzer.cc

@@ -15,6 +15,7 @@
 #include <vector>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -25,6 +26,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   ExtractSpirvOptions(&reader, &options);
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kSpv, OutputFormat::kSpv);
   fuzzer.SetOptionsSpirv(options);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(reader.data(), reader.size());
 }
 

fuzzers/tint_spv_reader_wgsl_writer_fuzzer.cc

@@ -15,12 +15,14 @@
 #include <vector>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kSpv, OutputFormat::kWGSL);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(data, size);
 }
 

fuzzers/tint_vertex_pulling_fuzzer.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -31,6 +32,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetTransformManager(&transform_manager, {});
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(r.data(), r.size());
 }

fuzzers/tint_wgsl_reader_fuzzer.cc

@@ -15,12 +15,14 @@
 #include <string>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kNone);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(data, size);
 }
 

fuzzers/tint_wgsl_reader_hlsl_writer_fuzzer.cc

@@ -15,12 +15,14 @@
 #include <string>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kHLSL);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(data, size);
 }
 

fuzzers/tint_wgsl_reader_msl_writer_fuzzer.cc

@@ -15,6 +15,7 @@
 #include <string>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -25,6 +26,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   ExtractMslOptions(&reader, &options);
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kMSL);
   fuzzer.SetOptionsMsl(options);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(reader.data(), reader.size());
 }
 

fuzzers/tint_wgsl_reader_spv_writer_fuzzer.cc

@@ -15,6 +15,7 @@
 #include <string>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
@@ -25,6 +26,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   ExtractSpirvOptions(&reader, &options);
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
   fuzzer.SetOptionsSpirv(options);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(reader.data(), reader.size());
 }
 

fuzzers/tint_wgsl_reader_wgsl_writer_fuzzer.cc

@@ -15,12 +15,14 @@
 #include <string>
 
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/tint_init_fuzzer.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kWGSL);
+  fuzzer.SetDumpInput(GetCliParams().dump_input);
   return fuzzer.Run(data, size);
 }