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- // Copyright 2017 The Chromium 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 <stdlib.h>
- #include <iostream>
- #include "javascript_parser.pb.h" // from out/gen
- #include "testing/libfuzzer/fuzzers/javascript_parser_proto_to_string.h"
- #include "third_party/libprotobuf-mutator/src/src/libfuzzer/libfuzzer_macro.h"
- #include "v8/include/libplatform/libplatform.h"
- #include "v8/include/v8.h"
- // Silence logging from the protobuf library.
- protobuf_mutator::protobuf::LogSilencer log_silencer;
- v8::Isolate* isolate = nullptr;
- std::string protobuf_to_string(
- const javascript_parser_proto_fuzzer::Source& source_protobuf) {
- std::string source;
- for (const auto& token : source_protobuf.tokens()) {
- source += token_to_string(token, 0) + std::string(" ");
- }
- return source;
- }
- // Explicitly specify some attributes to avoid issues with the linker dead-
- // stripping the following function on macOS, as it is not called directly
- // by fuzz target. LibFuzzer runtime uses dlsym() to resolve that function.
- #if V8_OS_MACOS
- __attribute__((used)) __attribute__((visibility("default")))
- #endif // V8_OS_MACOS
- extern "C" int
- LLVMFuzzerInitialize(int* argc, char*** argv) {
- v8::V8::InitializeICUDefaultLocation((*argv)[0]);
- v8::V8::InitializeExternalStartupData((*argv)[0]);
- v8::V8::SetFlagsFromCommandLine(argc, *argv, true);
- // Intentionally leaked during fuzzing.
- v8::Platform* platform = v8::platform::NewDefaultPlatform().release();
- v8::V8::InitializePlatform(platform);
- v8::V8::Initialize();
- v8::Isolate::CreateParams create_params;
- create_params.array_buffer_allocator =
- v8::ArrayBuffer::Allocator::NewDefaultAllocator();
- isolate = v8::Isolate::New(create_params);
- return 0;
- }
- DEFINE_BINARY_PROTO_FUZZER(
- const javascript_parser_proto_fuzzer::Source& source_protobuf) {
- v8::Isolate::Scope isolate_scope(isolate);
- v8::HandleScope handle_scope(isolate);
- v8::Local<v8::Context> context = v8::Context::New(isolate);
- v8::Context::Scope context_scope(context);
- std::string source_string = protobuf_to_string(source_protobuf);
- if (getenv("LPM_DUMP_NATIVE_INPUT")) {
- std::cout << source_string << std::endl;
- std::cout << "module: " << source_protobuf.is_module() << std::endl;
- }
- v8::Local<v8::String> source_v8_string =
- v8::String::NewFromUtf8(isolate, source_string.c_str(),
- v8::NewStringType::kNormal)
- .ToLocalChecked();
- {
- v8::TryCatch try_catch(isolate);
- if (source_protobuf.is_module()) {
- v8::Local<v8::String> name =
- v8::String::NewFromUtf8(isolate, "module.js",
- v8::NewStringType::kNormal)
- .ToLocalChecked();
- v8::ScriptOrigin origin(isolate, name, 0, 0, false, -1,
- v8::Local<v8::Value>(), false, false, true);
- v8::ScriptCompiler::Source source(source_v8_string, origin);
- v8::MaybeLocal<v8::Module> module =
- v8::ScriptCompiler::CompileModule(isolate, &source);
- // TODO(marja): Figure out a more elegant way to silence the warning.
- module.IsEmpty();
- } else {
- v8::MaybeLocal<v8::Script> script =
- v8::Script::Compile(context, source_v8_string);
- // TODO(marja): Figure out a more elegant way to silence the warning.
- script.IsEmpty();
- }
- // TODO(crbug.com/775796): run the code once we find a way to avoid endless
- // loops.
- }
- }
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