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/*
* A fuzzer focused on C string -> Javascript String.
*/
#include <stdlib.h>
#include "js_native_api.h"
#include "js_native_api_v8.h"
#include "node.h"
#include "node_platform.h"
#include "node_internals.h"
#include "node_api_internals.h"
#include "node_url.h"
#include "env-inl.h"
#include "util-inl.h"
#include "v8.h"
#include "libplatform/libplatform.h"
#include "aliased_buffer.h"
#include "fuzz_helper.h"
using node::AliasedBufferBase;
/* General set up */
using ArrayBufferUniquePtr = std::unique_ptr<node::ArrayBufferAllocator,
decltype(&node::FreeArrayBufferAllocator)>;
using TracingAgentUniquePtr = std::unique_ptr<node::tracing::Agent>;
using NodePlatformUniquePtr = std::unique_ptr<node::NodePlatform>;
static TracingAgentUniquePtr tracing_agent;
static NodePlatformUniquePtr platform;
static uv_loop_t current_loop;
static napi_env addon_env;
inline napi_env NewEnv(v8::Local<v8::Context> context,
const std::string& module_filename,
int32_t module_api_version) ;
extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {
uv_os_unsetenv("NODE_OPTIONS");
std::vector<std::string> node_argv{ "fuzz_string_conversion" };
std::vector<std::string> exec_argv;
std::vector<std::string> errors;
node::InitializeNodeWithArgs(&node_argv, &exec_argv, &errors);
tracing_agent = std::make_unique<node::tracing::Agent>();
node::tracing::TraceEventHelper::SetAgent(tracing_agent.get());
node::tracing::TracingController* tracing_controller =
tracing_agent->GetTracingController();
CHECK_EQ(0, uv_loop_init(¤t_loop));
static constexpr int kV8ThreadPoolSize = 4;
platform.reset(
new node::NodePlatform(kV8ThreadPoolSize, tracing_controller));
v8::V8::InitializePlatform(platform.get());
cppgc::InitializeProcess(platform->GetPageAllocator());
v8::V8::Initialize();
return 0;
}
class FuzzerFixtureHelper {
public:
v8::Isolate* isolate_;
ArrayBufferUniquePtr allocator;
FuzzerFixtureHelper()
: allocator(ArrayBufferUniquePtr(node::CreateArrayBufferAllocator(),
&node::FreeArrayBufferAllocator)) {
isolate_ = NewIsolate(allocator.get(), ¤t_loop, platform.get());
CHECK_NOT_NULL(isolate_);
isolate_->Enter();
};
void Teardown() {
platform->DrainTasks(isolate_);
isolate_->Exit();
platform->UnregisterIsolate(isolate_);
isolate_->Dispose();
isolate_ = nullptr;
}
};
void EnvTest(v8::Isolate* isolate_, char* env_string, size_t size) {
const v8::HandleScope handle_scope(isolate_);
Argv argv;
node::EnvironmentFlags::Flags flags = node::EnvironmentFlags::kDefaultFlags;
auto isolate = handle_scope.GetIsolate();
v8::Local<v8::Context> context_ = node::NewContext(isolate);
context_->Enter();
node::IsolateData* isolate_data_ = node::CreateIsolateData(isolate, ¤t_loop,
platform.get());
std::vector<std::string> args(*argv, *argv + 1);
std::vector<std::string> exec_args(*argv, *argv + 1);
node::Environment* environment_ = node::CreateEnvironment(isolate_data_,
context_, args, exec_args, flags);
node::Environment* envi = environment_;
SetProcessExitHandler(envi, [&](node::Environment* env_, int exit_code) {
node::Stop(envi);
});
node::LoadEnvironment(envi, "");
napi_addon_register_func init = [](napi_env env, napi_value exports) {
addon_env = env;
return exports;
};
v8::Local<v8::Object> module_obj = v8::Object::New(isolate);
v8::Local<v8::Object> exports_obj = v8::Object::New(isolate);
napi_module_register_by_symbol(
exports_obj, module_obj, context_, init, NAPI_VERSION);
size_t copied1, copied2;
napi_value output1, output2;
char *buf1 = (char *)malloc(size);
char *buf2 = (char *)malloc(size);
napi_create_string_utf8(addon_env, env_string, size, &output1);
napi_get_value_string_utf8(addon_env, output1, buf1, size, &copied1);
napi_create_string_latin1(addon_env, env_string, size, &output2);
napi_get_value_string_latin1(addon_env, output2, buf2, size, &copied2);
free(buf1);
free(buf2);
// Cleanup!
node::FreeEnvironment(environment_);
node::FreeIsolateData(isolate_data_);
context_->Exit();
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data2, size_t size) {
FuzzerFixtureHelper ffh;
std::string s(reinterpret_cast<const char*>(data2), size);
EnvTest(ffh.isolate_, (char*)s.c_str(), size);
ffh.Teardown();
return 0;
}
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