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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_MACOSX
__attribute__((used)) __attribute__((visibility("default")))
#endif // V8_OS_MACOSX
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(
name, v8::Local<v8::Integer>(), v8::Local<v8::Integer>(),
v8::Local<v8::Boolean>(), v8::Local<v8::Integer>(),
v8::Local<v8::Value>(), v8::Local<v8::Boolean>(),
v8::Local<v8::Boolean>(), v8::True(isolate));
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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