[wasm] Write fuzzers for single wasm sections.

test/fuzzer/wasm-section.cc

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "test/fuzzer/wasm-section-fuzzers.h"
+
+using namespace v8::internal;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  bool run_all = !(FLAG_wasm_fuzz_types || FLAG_wasm_fuzz_names ||
+                   FLAG_wasm_fuzz_globals || FLAG_wasm_fuzz_imports ||
+                   FLAG_wasm_fuzz_function_sigs || FLAG_wasm_fuzz_memory ||
+                   FLAG_wasm_fuzz_data);
+
+  if (run_all || FLAG_wasm_fuzz_types) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::Signatures, data,
+                      size);
+  }
+  if (run_all || FLAG_wasm_fuzz_names) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::Names, data, size);
+  }
+  if (run_all || FLAG_wasm_fuzz_globals) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::Globals, data,
+                      size);
+  }
+  if (run_all || FLAG_wasm_fuzz_imports) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::ImportTable, data,
+                      size);
+  }
+  if (run_all || FLAG_wasm_fuzz_function_sigs) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::FunctionSignatures,
+                      data, size);
+  }
+  if (run_all || FLAG_wasm_fuzz_memory) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::Memory, data,
+                      size);
+  }
+  if (run_all || FLAG_wasm_fuzz_data) {
+    fuzz_wasm_section(v8::internal::wasm::WasmSection::Code::DataSegments, data,
+                      size);
+  }
+
+  return 0;
+}