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#include "async_wrap-inl.h" #include "base_object-inl.h" #include "debug_utils-inl.h" #include "env-inl.h" #include "memory_tracker-inl.h" #include "node.h" #include "node_dotenv.h" #include "node_errors.h" #include "node_external_reference.h" #include "node_internals.h" #include "node_process-inl.h" #include "util-inl.h" #include "uv.h" #include "v8-fast-api-calls.h" #include "v8.h" #include <vector> #if HAVE_INSPECTOR #include "inspector_io.h" #endif #include <climits> // PATH_MAX #include <cstdio> #if defined(_MSC_VER) #include <direct.h> #include <io.h> #define umask _umask typedef int mode_t; #else #include <pthread.h> #include <sys/resource.h> // getrlimit, setrlimit #include <termios.h> // tcgetattr, tcsetattr #endif namespace node { using v8::Array; using v8::ArrayBuffer; using v8::CFunction; using v8::Context; using v8::Float64Array; using v8::FunctionCallbackInfo; using v8::HeapStatistics; using v8::Integer; using v8::Isolate; using v8::Local; using v8::Maybe; using v8::NewStringType; using v8::Number; using v8::Object; using v8::ObjectTemplate; using v8::String; using v8::Uint32; using v8::Value; namespace per_process { Mutex umask_mutex; } // namespace per_process // Microseconds in a second, as a float, used in CPUUsage() below #define MICROS_PER_SEC 1e6 // used in Hrtime() and Uptime() below #define NANOS_PER_SEC 1000000000 static void Abort(const FunctionCallbackInfo<Value>& args) { ABORT(); } // For internal testing only, not exposed to userland. static void CauseSegfault(const FunctionCallbackInfo<Value>& args) { // This should crash hard all platforms. volatile void** d = static_cast<volatile void**>(nullptr); *d = nullptr; } static void Chdir(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); CHECK(env->owns_process_state()); CHECK_EQ(args.Length(), 1); CHECK(args[0]->IsString()); Utf8Value path(env->isolate(), args[0]); int err = uv_chdir(*path); if (err) { // Also include the original working directory, since that will usually // be helpful information when debugging a `chdir()` failure. char buf[PATH_MAX_BYTES]; size_t cwd_len = sizeof(buf); uv_cwd(buf, &cwd_len); return env->ThrowUVException(err, "chdir", nullptr, buf, *path); } } inline Local<ArrayBuffer> get_fields_array_buffer( const FunctionCallbackInfo<Value>& args, size_t index, size_t array_length) { CHECK(args[index]->IsFloat64Array()); Local<Float64Array> arr = args[index].As<Float64Array>(); CHECK_EQ(arr->Length(), array_length); return arr->Buffer(); } // CPUUsage use libuv's uv_getrusage() this-process resource usage accessor, // to access ru_utime (user CPU time used) and ru_stime (system CPU time used), // which are uv_timeval_t structs (long tv_sec, long tv_usec). // Returns those values as Float64 microseconds in the elements of the array // passed to the function. static void CPUUsage(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); uv_rusage_t rusage; // Call libuv to get the values we'll return. int err = uv_getrusage(&rusage); if (err) return env->ThrowUVException(err, "uv_getrusage"); // Get the double array pointer from the Float64Array argument. Local<ArrayBuffer> ab = get_fields_array_buffer(args, 0, 2); double* fields = static_cast<double*>(ab->Data()); // Set the Float64Array elements to be user / system values in microseconds. fields[0] = MICROS_PER_SEC * rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec; fields[1] = MICROS_PER_SEC * rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec; } static void Cwd(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); CHECK(env->has_run_bootstrapping_code()); char buf[PATH_MAX_BYTES]; size_t cwd_len = sizeof(buf); int err = uv_cwd(buf, &cwd_len); if (err) return env->ThrowUVException(err, "uv_cwd"); Local<String> cwd = String::NewFromUtf8(env->isolate(), buf, NewStringType::kNormal, cwd_len).ToLocalChecked(); args.GetReturnValue().Set(cwd); } static void Kill(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); Local<Context> context = env->context(); if (args.Length() < 2) { THROW_ERR_MISSING_ARGS(env, "Bad argument."); } int pid; if (!args[0]->Int32Value(context).To(&pid)) return; int sig; if (!args[1]->Int32Value(context).To(&sig)) return; uv_pid_t own_pid = uv_os_getpid(); if (sig > 0 && (pid == 0 || pid == -1 || pid == own_pid || pid == -own_pid) && !HasSignalJSHandler(sig)) { // This is most likely going to terminate this process. // It's not an exact method but it might be close enough. RunAtExit(env); } int err = uv_kill(pid, sig); args.GetReturnValue().Set(err); } static void Rss(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); size_t rss; int err = uv_resident_set_memory(&rss); if (err) return env->ThrowUVException(err, "uv_resident_set_memory"); args.GetReturnValue().Set(static_cast<double>(rss)); } static void MemoryUsage(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); Isolate* isolate = env->isolate(); // V8 memory usage HeapStatistics v8_heap_stats; isolate->GetHeapStatistics(&v8_heap_stats); NodeArrayBufferAllocator* array_buffer_allocator = env->isolate_data()->node_allocator(); // Get the double array pointer from the Float64Array argument. Local<ArrayBuffer> ab = get_fields_array_buffer(args, 0, 5); double* fields = static_cast<double*>(ab->Data()); size_t rss; int err = uv_resident_set_memory(&rss); if (err) return env->ThrowUVException(err, "uv_resident_set_memory"); fields[0] = static_cast<double>(rss); fields[1] = static_cast<double>(v8_heap_stats.total_heap_size()); fields[2] = static_cast<double>(v8_heap_stats.used_heap_size()); fields[3] = static_cast<double>(v8_heap_stats.external_memory()); fields[4] = array_buffer_allocator == nullptr ? 0 : static_cast<double>(array_buffer_allocator->total_mem_usage()); } static void GetConstrainedMemory(const FunctionCallbackInfo<Value>& args) { uint64_t value = uv_get_constrained_memory(); if (value != 0) { args.GetReturnValue().Set(static_cast<double>(value)); } } void RawDebug(const FunctionCallbackInfo<Value>& args) { CHECK(args.Length() == 1 && args[0]->IsString() && "must be called with a single string"); Utf8Value message(args.GetIsolate(), args[0]); FPrintF(stderr, "%s\n", message); fflush(stderr); } static void Umask(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); CHECK(env->has_run_bootstrapping_code()); CHECK_EQ(args.Length(), 1); CHECK(args[0]->IsUndefined() || args[0]->IsUint32()); Mutex::ScopedLock scoped_lock(per_process::umask_mutex); uint32_t old; if (args[0]->IsUndefined()) { old = umask(0); umask(static_cast<mode_t>(old)); } else { int oct = args[0].As<Uint32>()->Value(); old = umask(static_cast<mode_t>(oct)); } args.GetReturnValue().Set(old); } static void Uptime(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); uv_update_time(env->event_loop()); double uptime = static_cast<double>(uv_hrtime() - per_process::node_start_time); Local<Number> result = Number::New(env->isolate(), uptime / NANOS_PER_SEC); args.GetReturnValue().Set(result); } static void GetActiveRequests(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); std::vector<Local<Value>> request_v; for (ReqWrapBase* req_wrap : *env->req_wrap_queue()) { AsyncWrap* w = req_wrap->GetAsyncWrap(); if (w->persistent().IsEmpty()) continue; request_v.emplace_back(w->GetOwner()); } args.GetReturnValue().Set( Array::New(env->isolate(), request_v.data(), request_v.size())); } // Non-static, friend of HandleWrap. Could have been a HandleWrap method but // implemented here for consistency with GetActiveRequests(). void GetActiveHandles(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); std::vector<Local<Value>> handle_v; for (auto w : *env->handle_wrap_queue()) { if (!HandleWrap::HasRef(w)) continue; handle_v.emplace_back(w->GetOwner()); } args.GetReturnValue().Set( Array::New(env->isolate(), handle_v.data(), handle_v.size())); } static void GetActiveResourcesInfo(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); std::vector<Local<Value>> resources_info; // Active requests for (ReqWrapBase* req_wrap : *env->req_wrap_queue()) { AsyncWrap* w = req_wrap->GetAsyncWrap(); if (w->persistent().IsEmpty()) continue; resources_info.emplace_back( OneByteString(env->isolate(), w->MemoryInfoName())); } // Active handles for (HandleWrap* w : *env->handle_wrap_queue()) { if (w->persistent().IsEmpty() || !HandleWrap::HasRef(w)) continue; resources_info.emplace_back( OneByteString(env->isolate(), w->MemoryInfoName())); } // Active timeouts resources_info.insert(resources_info.end(), env->timeout_info()[0], OneByteString(env->isolate(), "Timeout")); // Active immediates resources_info.insert(resources_info.end(), env->immediate_info()->ref_count(), OneByteString(env->isolate(), "Immediate")); args.GetReturnValue().Set( Array::New(env->isolate(), resources_info.data(), resources_info.size())); } static void ResourceUsage(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); uv_rusage_t rusage; int err = uv_getrusage(&rusage); if (err) return env->ThrowUVException(err, "uv_getrusage"); Local<ArrayBuffer> ab = get_fields_array_buffer(args, 0, 16); double* fields = static_cast<double*>(ab->Data()); fields[0] = MICROS_PER_SEC * rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec; fields[1] = MICROS_PER_SEC * rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec; fields[2] = static_cast<double>(rusage.ru_maxrss); fields[3] = static_cast<double>(rusage.ru_ixrss); fields[4] = static_cast<double>(rusage.ru_idrss); fields[5] = static_cast<double>(rusage.ru_isrss); fields[6] = static_cast<double>(rusage.ru_minflt); fields[7] = static_cast<double>(rusage.ru_majflt); fields[8] = static_cast<double>(rusage.ru_nswap); fields[9] = static_cast<double>(rusage.ru_inblock); fields[10] = static_cast<double>(rusage.ru_oublock); fields[11] = static_cast<double>(rusage.ru_msgsnd); fields[12] = static_cast<double>(rusage.ru_msgrcv); fields[13] = static_cast<double>(rusage.ru_nsignals); fields[14] = static_cast<double>(rusage.ru_nvcsw); fields[15] = static_cast<double>(rusage.ru_nivcsw); } #ifdef __POSIX__ static void DebugProcess(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); if (args.Length() < 1) { return THROW_ERR_MISSING_ARGS(env, "Invalid number of arguments."); } CHECK(args[0]->IsNumber()); pid_t pid = args[0].As<Integer>()->Value(); int r = kill(pid, SIGUSR1); if (r != 0) { return env->ThrowErrnoException(errno, "kill"); } } #endif // __POSIX__ #ifdef _WIN32 static int GetDebugSignalHandlerMappingName(DWORD pid, wchar_t* buf, size_t buf_len) { return _snwprintf(buf, buf_len, L"node-debug-handler-%u", pid); } static void DebugProcess(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); Isolate* isolate = args.GetIsolate(); if (args.Length() < 1) { return THROW_ERR_MISSING_ARGS(env, "Invalid number of arguments."); } HANDLE process = nullptr; HANDLE thread = nullptr; HANDLE mapping = nullptr; wchar_t mapping_name[32]; LPTHREAD_START_ROUTINE* handler = nullptr; DWORD pid = 0; auto cleanup = OnScopeLeave([&]() { if (process != nullptr) CloseHandle(process); if (thread != nullptr) CloseHandle(thread); if (handler != nullptr) UnmapViewOfFile(handler); if (mapping != nullptr) CloseHandle(mapping); }); CHECK(args[0]->IsNumber()); pid = static_cast<DWORD>(args[0].As<Integer>()->Value()); process = OpenProcess(PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION | PROCESS_VM_OPERATION | PROCESS_VM_WRITE | PROCESS_VM_READ, FALSE, pid); if (process == nullptr) { isolate->ThrowException( WinapiErrnoException(isolate, GetLastError(), "OpenProcess")); return; } if (GetDebugSignalHandlerMappingName( pid, mapping_name, arraysize(mapping_name)) < 0) { env->ThrowErrnoException(errno, "sprintf"); return; } mapping = OpenFileMappingW(FILE_MAP_READ, FALSE, mapping_name); if (mapping == nullptr) { isolate->ThrowException( WinapiErrnoException(isolate, GetLastError(), "OpenFileMappingW")); return; } handler = reinterpret_cast<LPTHREAD_START_ROUTINE*>( MapViewOfFile(mapping, FILE_MAP_READ, 0, 0, sizeof *handler)); if (handler == nullptr || *handler == nullptr) { isolate->ThrowException( WinapiErrnoException(isolate, GetLastError(), "MapViewOfFile")); return; } thread = CreateRemoteThread(process, nullptr, 0, *handler, nullptr, 0, nullptr); if (thread == nullptr) { isolate->ThrowException( WinapiErrnoException(isolate, GetLastError(), "CreateRemoteThread")); return; } // Wait for the thread to terminate if (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0) { isolate->ThrowException( WinapiErrnoException(isolate, GetLastError(), "WaitForSingleObject")); return; } } #endif // _WIN32 static void DebugEnd(const FunctionCallbackInfo<Value>& args) { #if HAVE_INSPECTOR Environment* env = Environment::GetCurrent(args); if (env->inspector_agent()->IsListening()) { env->inspector_agent()->Stop(); } #endif } static void ReallyExit(const FunctionCallbackInfo<Value>& args) { Environment* env = Environment::GetCurrent(args); RunAtExit(env); ExitCode code = ExitCode::kNoFailure; Maybe<int32_t> code_int = args[0]->Int32Value(env->context()); if (!code_int.IsNothing()) { code = static_cast<ExitCode>(code_int.FromJust()); } env->Exit(code); } static void LoadEnvFile(const v8::FunctionCallbackInfo<v8::Value>& args) { Environment* env = Environment::GetCurrent(args); std::string path = ".env"; if (args.Length() == 1) { Utf8Value path_value(args.GetIsolate(), args[0]); path = path_value.ToString(); } THROW_IF_INSUFFICIENT_PERMISSIONS( env, permission::PermissionScope::kFileSystemRead, path); Dotenv dotenv{}; switch (dotenv.ParsePath(path)) { case dotenv.ParseResult::Valid: { dotenv.SetEnvironment(env); break; } case dotenv.ParseResult::InvalidContent: { THROW_ERR_INVALID_ARG_TYPE( env, "Contents of '%s' should be a valid string.", path.c_str()); break; } case dotenv.ParseResult::FileError: { env->ThrowUVException(UV_ENOENT, "Failed to load '%s'.", path.c_str()); break; } default: UNREACHABLE(); } } namespace process { BindingData::BindingData(Realm* realm, v8::Local<v8::Object> object, InternalFieldInfo* info) : SnapshotableObject(realm, object, type_int), hrtime_buffer_(realm->isolate(), kHrTimeBufferLength, MAYBE_FIELD_PTR(info, hrtime_buffer)) { Isolate* isolate = realm->isolate(); Local<Context> context = realm->context(); if (info == nullptr) { object ->Set(context, FIXED_ONE_BYTE_STRING(isolate, "hrtimeBuffer"), hrtime_buffer_.GetJSArray()) .ToChecked(); } else { hrtime_buffer_.Deserialize(realm->context()); } // The hrtime buffer is referenced from the binding data js object. // Make the native handle weak to avoid keeping the realm alive. hrtime_buffer_.MakeWeak(); } v8::CFunction BindingData::fast_number_(v8::CFunction::Make(FastNumber)); v8::CFunction BindingData::fast_bigint_(v8::CFunction::Make(FastBigInt)); void BindingData::AddMethods(Isolate* isolate, Local<ObjectTemplate> target) { SetFastMethodNoSideEffect( isolate, target, "hrtime", SlowNumber, &fast_number_); SetFastMethodNoSideEffect( isolate, target, "hrtimeBigInt", SlowBigInt, &fast_bigint_); } void BindingData::RegisterExternalReferences( ExternalReferenceRegistry* registry) { registry->Register(SlowNumber); registry->Register(SlowBigInt); registry->Register(FastNumber); registry->Register(FastBigInt); registry->Register(fast_number_.GetTypeInfo()); registry->Register(fast_bigint_.GetTypeInfo()); } BindingData* BindingData::FromV8Value(Local<Value> value) { Local<Object> v8_object = value.As<Object>(); return static_cast<BindingData*>( v8_object->GetAlignedPointerFromInternalField(BaseObject::kSlot)); } void BindingData::MemoryInfo(MemoryTracker* tracker) const { tracker->TrackField("hrtime_buffer", hrtime_buffer_); } // This is the legacy version of hrtime before BigInt was introduced in // JavaScript. // The value returned by uv_hrtime() is a 64-bit int representing nanoseconds, // so this function instead fills in an Uint32Array with 3 entries, // to avoid any integer overflow possibility. // The first two entries contain the second part of the value // broken into the upper/lower 32 bits to be converted back in JS, // because there is no Uint64Array in JS. // The third entry contains the remaining nanosecond part of the value. void BindingData::NumberImpl(BindingData* receiver) { uint64_t t = uv_hrtime(); receiver->hrtime_buffer_[0] = (t / NANOS_PER_SEC) >> 32; receiver->hrtime_buffer_[1] = (t / NANOS_PER_SEC) & 0xffffffff; receiver->hrtime_buffer_[2] = t % NANOS_PER_SEC; } void BindingData::BigIntImpl(BindingData* receiver) { uint64_t t = uv_hrtime(); // The buffer is a Uint32Array, so we need to reinterpret it as a // Uint64Array to write the value. The buffer is valid at this scope so we // can safely cast away the constness. uint64_t* fields = reinterpret_cast<uint64_t*>( const_cast<uint32_t*>(receiver->hrtime_buffer_.GetNativeBuffer())); fields[0] = t; } void BindingData::SlowBigInt(const FunctionCallbackInfo<Value>& args) { BigIntImpl(FromJSObject<BindingData>(args.Holder())); } void BindingData::SlowNumber(const v8::FunctionCallbackInfo<v8::Value>& args) { NumberImpl(FromJSObject<BindingData>(args.Holder())); } bool BindingData::PrepareForSerialization(Local<Context> context, v8::SnapshotCreator* creator) { DCHECK_NULL(internal_field_info_); internal_field_info_ = InternalFieldInfoBase::New<InternalFieldInfo>(type()); internal_field_info_->hrtime_buffer = hrtime_buffer_.Serialize(context, creator); // Return true because we need to maintain the reference to the binding from // JS land. return true; } InternalFieldInfoBase* BindingData::Serialize(int index) { DCHECK_IS_SNAPSHOT_SLOT(index); InternalFieldInfo* info = internal_field_info_; internal_field_info_ = nullptr; return info; } void BindingData::Deserialize(Local<Context> context, Local<Object> holder, int index, InternalFieldInfoBase* info) { DCHECK_IS_SNAPSHOT_SLOT(index); v8::HandleScope scope(context->GetIsolate()); Realm* realm = Realm::GetCurrent(context); // Recreate the buffer in the constructor. InternalFieldInfo* casted_info = static_cast<InternalFieldInfo*>(info); BindingData* binding = realm->AddBindingData<BindingData>(holder, casted_info); CHECK_NOT_NULL(binding); } static void CreatePerIsolateProperties(IsolateData* isolate_data, Local<ObjectTemplate> target) { Isolate* isolate = isolate_data->isolate(); BindingData::AddMethods(isolate, target); // define various internal methods SetMethod(isolate, target, "_debugProcess", DebugProcess); SetMethod(isolate, target, "abort", Abort); SetMethod(isolate, target, "causeSegfault", CauseSegfault); SetMethod(isolate, target, "chdir", Chdir); SetMethod(isolate, target, "umask", Umask); SetMethod(isolate, target, "memoryUsage", MemoryUsage); SetMethod(isolate, target, "constrainedMemory", GetConstrainedMemory); SetMethod(isolate, target, "rss", Rss); SetMethod(isolate, target, "cpuUsage", CPUUsage); SetMethod(isolate, target, "resourceUsage", ResourceUsage); SetMethod(isolate, target, "_debugEnd", DebugEnd); SetMethod(isolate, target, "_getActiveRequests", GetActiveRequests); SetMethod(isolate, target, "_getActiveHandles", GetActiveHandles); SetMethod(isolate, target, "getActiveResourcesInfo", GetActiveResourcesInfo); SetMethod(isolate, target, "_kill", Kill); SetMethod(isolate, target, "_rawDebug", RawDebug); SetMethodNoSideEffect(isolate, target, "cwd", Cwd); SetMethod(isolate, target, "dlopen", binding::DLOpen); SetMethod(isolate, target, "reallyExit", ReallyExit); SetMethodNoSideEffect(isolate, target, "uptime", Uptime); SetMethod(isolate, target, "patchProcessObject", PatchProcessObject); SetMethod(isolate, target, "loadEnvFile", LoadEnvFile); } static void CreatePerContextProperties(Local<Object> target, Local<Value> unused, Local<Context> context, void* priv) { Realm* realm = Realm::GetCurrent(context); realm->AddBindingData<BindingData>(target); } void RegisterExternalReferences(ExternalReferenceRegistry* registry) { BindingData::RegisterExternalReferences(registry); registry->Register(DebugProcess); registry->Register(DebugEnd); registry->Register(Abort); registry->Register(CauseSegfault); registry->Register(Chdir); registry->Register(Umask); registry->Register(RawDebug); registry->Register(MemoryUsage); registry->Register(GetConstrainedMemory); registry->Register(Rss); registry->Register(CPUUsage); registry->Register(ResourceUsage); registry->Register(GetActiveRequests); registry->Register(GetActiveHandles); registry->Register(GetActiveResourcesInfo); registry->Register(Kill); registry->Register(Cwd); registry->Register(binding::DLOpen); registry->Register(ReallyExit); registry->Register(Uptime); registry->Register(PatchProcessObject); registry->Register(LoadEnvFile); } } // namespace process } // namespace node NODE_BINDING_CONTEXT_AWARE_INTERNAL(process_methods, node::process::CreatePerContextProperties) NODE_BINDING_PER_ISOLATE_INIT(process_methods, node::process::CreatePerIsolateProperties) NODE_BINDING_EXTERNAL_REFERENCE(process_methods, node::process::RegisterExternalReferences)