| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/isolate.h" |
| |
| #include "include/dart_api.h" |
| #include "platform/assert.h" |
| #include "platform/json.h" |
| #include "lib/mirrors.h" |
| #include "vm/code_observers.h" |
| #include "vm/compiler_stats.h" |
| #include "vm/coverage.h" |
| #include "vm/dart_api_state.h" |
| #include "vm/dart_entry.h" |
| #include "vm/debugger.h" |
| #include "vm/deopt_instructions.h" |
| #include "vm/heap.h" |
| #include "vm/message_handler.h" |
| #include "vm/object_id_ring.h" |
| #include "vm/object_store.h" |
| #include "vm/parser.h" |
| #include "vm/port.h" |
| #include "vm/profiler.h" |
| #include "vm/reusable_handles.h" |
| #include "vm/service.h" |
| #include "vm/simulator.h" |
| #include "vm/stack_frame.h" |
| #include "vm/stub_code.h" |
| #include "vm/symbols.h" |
| #include "vm/tags.h" |
| #include "vm/thread.h" |
| #include "vm/thread_interrupter.h" |
| #include "vm/timer.h" |
| #include "vm/visitor.h" |
| |
| |
| namespace dart { |
| |
| DEFINE_FLAG(bool, report_usage_count, false, |
| "Track function usage and report."); |
| DEFINE_FLAG(bool, trace_isolates, false, |
| "Trace isolate creation and shut down."); |
| DEFINE_FLAG(bool, pause_isolates_on_start, false, |
| "Pause isolates before starting."); |
| DEFINE_FLAG(bool, pause_isolates_on_exit, false, |
| "Pause isolates exiting."); |
| |
| |
| void Isolate::RegisterClass(const Class& cls) { |
| class_table()->Register(cls); |
| } |
| |
| |
| void Isolate::RegisterClassAt(intptr_t index, const Class& cls) { |
| class_table()->RegisterAt(index, cls); |
| } |
| |
| |
| void Isolate::ValidateClassTable() { |
| class_table()->Validate(); |
| } |
| |
| |
| class IsolateMessageHandler : public MessageHandler { |
| public: |
| explicit IsolateMessageHandler(Isolate* isolate); |
| ~IsolateMessageHandler(); |
| |
| const char* name() const; |
| void MessageNotify(Message::Priority priority); |
| bool HandleMessage(Message* message); |
| |
| #if defined(DEBUG) |
| // Check that it is safe to access this handler. |
| void CheckAccess(); |
| #endif |
| bool IsCurrentIsolate() const; |
| virtual Isolate* GetIsolate() const { return isolate_; } |
| bool UnhandledExceptionCallbackHandler(const Object& message, |
| const UnhandledException& error); |
| |
| private: |
| bool ProcessUnhandledException(const Object& message, const Error& result); |
| RawFunction* ResolveCallbackFunction(); |
| Isolate* isolate_; |
| }; |
| |
| |
| IsolateMessageHandler::IsolateMessageHandler(Isolate* isolate) |
| : isolate_(isolate) { |
| } |
| |
| |
| IsolateMessageHandler::~IsolateMessageHandler() { |
| } |
| |
| const char* IsolateMessageHandler::name() const { |
| return isolate_->name(); |
| } |
| |
| |
| void IsolateMessageHandler::MessageNotify(Message::Priority priority) { |
| if (priority >= Message::kOOBPriority) { |
| // Handle out of band messages even if the isolate is busy. |
| isolate_->ScheduleInterrupts(Isolate::kMessageInterrupt); |
| } |
| Dart_MessageNotifyCallback callback = isolate_->message_notify_callback(); |
| if (callback) { |
| // Allow the embedder to handle message notification. |
| (*callback)(Api::CastIsolate(isolate_)); |
| } |
| } |
| |
| |
| bool IsolateMessageHandler::HandleMessage(Message* message) { |
| StartIsolateScope start_scope(isolate_); |
| StackZone zone(isolate_); |
| HandleScope handle_scope(isolate_); |
| // TODO(turnidge): Rework collection total dart execution. This can |
| // overcount when other things (gc, compilation) are active. |
| TIMERSCOPE(isolate_, time_dart_execution); |
| |
| // If the message is in band we lookup the receive port to dispatch to. If |
| // the receive port is closed, we drop the message without deserializing it. |
| Object& receive_port = Object::Handle(); |
| if (!message->IsOOB()) { |
| receive_port = DartLibraryCalls::LookupReceivePort(message->dest_port()); |
| if (receive_port.IsError()) { |
| return ProcessUnhandledException(Object::null_instance(), |
| Error::Cast(receive_port)); |
| } |
| if (receive_port.IsNull()) { |
| delete message; |
| return true; |
| } |
| } |
| |
| // Parse the message. |
| SnapshotReader reader(message->data(), message->len(), |
| Snapshot::kMessage, Isolate::Current()); |
| const Object& msg_obj = Object::Handle(reader.ReadObject()); |
| if (msg_obj.IsError()) { |
| // An error occurred while reading the message. |
| return ProcessUnhandledException(Object::null_instance(), |
| Error::Cast(msg_obj)); |
| } |
| if (!msg_obj.IsNull() && !msg_obj.IsInstance()) { |
| // TODO(turnidge): We need to decide what an isolate does with |
| // malformed messages. If they (eventually) come from a remote |
| // machine, then it might make sense to drop the message entirely. |
| // In the case that the message originated locally, which is |
| // always true for now, then this should never occur. |
| UNREACHABLE(); |
| } |
| |
| Instance& msg = Instance::Handle(); |
| msg ^= msg_obj.raw(); // Can't use Instance::Cast because may be null. |
| |
| bool success = true; |
| if (message->IsOOB()) { |
| Service::HandleIsolateMessage(isolate_, msg); |
| } else { |
| const Object& result = Object::Handle( |
| DartLibraryCalls::HandleMessage(receive_port, msg)); |
| if (result.IsError()) { |
| success = ProcessUnhandledException(msg, Error::Cast(result)); |
| } else { |
| ASSERT(result.IsNull()); |
| } |
| } |
| delete message; |
| return success; |
| } |
| |
| |
| RawFunction* IsolateMessageHandler::ResolveCallbackFunction() { |
| ASSERT(isolate_->object_store()->unhandled_exception_handler() != NULL); |
| String& callback_name = String::Handle(isolate_); |
| if (isolate_->object_store()->unhandled_exception_handler() != |
| String::null()) { |
| callback_name = isolate_->object_store()->unhandled_exception_handler(); |
| } else { |
| callback_name = String::New("_unhandledExceptionCallback"); |
| } |
| Library& lib = |
| Library::Handle(isolate_, isolate_->object_store()->isolate_library()); |
| Function& func = |
| Function::Handle(isolate_, lib.LookupLocalFunction(callback_name)); |
| if (func.IsNull()) { |
| lib = isolate_->object_store()->root_library(); |
| func = lib.LookupLocalFunction(callback_name); |
| } |
| return func.raw(); |
| } |
| |
| |
| bool IsolateMessageHandler::UnhandledExceptionCallbackHandler( |
| const Object& message, const UnhandledException& error) { |
| const Instance& cause = Instance::Handle(isolate_, error.exception()); |
| const Instance& stacktrace = |
| Instance::Handle(isolate_, error.stacktrace()); |
| |
| // Wrap these args into an IsolateUncaughtException object. |
| const Array& exception_args = Array::Handle(Array::New(3)); |
| exception_args.SetAt(0, message); |
| exception_args.SetAt(1, cause); |
| exception_args.SetAt(2, stacktrace); |
| const Object& exception = |
| Object::Handle(isolate_, |
| Exceptions::Create(Exceptions::kIsolateUnhandledException, |
| exception_args)); |
| if (exception.IsError()) { |
| return false; |
| } |
| ASSERT(exception.IsInstance()); |
| |
| // Invoke script's callback function. |
| Object& function = Object::Handle(isolate_, ResolveCallbackFunction()); |
| if (function.IsNull() || function.IsError()) { |
| return false; |
| } |
| const Array& callback_args = Array::Handle(Array::New(1)); |
| callback_args.SetAt(0, exception); |
| const Object& result = |
| Object::Handle(DartEntry::InvokeFunction(Function::Cast(function), |
| callback_args)); |
| if (result.IsError()) { |
| const Error& err = Error::Cast(result); |
| OS::PrintErr("failed calling unhandled exception callback: %s\n", |
| err.ToErrorCString()); |
| return false; |
| } |
| |
| ASSERT(result.IsBool()); |
| bool continue_from_exception = Bool::Cast(result).value(); |
| if (continue_from_exception) { |
| isolate_->object_store()->clear_sticky_error(); |
| } |
| return continue_from_exception; |
| } |
| |
| #if defined(DEBUG) |
| void IsolateMessageHandler::CheckAccess() { |
| ASSERT(IsCurrentIsolate()); |
| } |
| #endif |
| |
| |
| bool IsolateMessageHandler::IsCurrentIsolate() const { |
| return (isolate_ == Isolate::Current()); |
| } |
| |
| |
| bool IsolateMessageHandler::ProcessUnhandledException( |
| const Object& message, const Error& result) { |
| if (result.IsUnhandledException()) { |
| // Invoke the isolate's uncaught exception handler, if it exists. |
| const UnhandledException& error = UnhandledException::Cast(result); |
| RawInstance* exception = error.exception(); |
| if ((exception != isolate_->object_store()->out_of_memory()) && |
| (exception != isolate_->object_store()->stack_overflow())) { |
| if (UnhandledExceptionCallbackHandler(message, error)) { |
| return true; |
| } |
| } |
| } |
| |
| // Invoke the isolate's unhandled exception callback if there is one. |
| if (Isolate::UnhandledExceptionCallback() != NULL) { |
| Dart_EnterScope(); |
| Dart_Handle error = Api::NewHandle(isolate_, result.raw()); |
| (Isolate::UnhandledExceptionCallback())(error); |
| Dart_ExitScope(); |
| } |
| |
| isolate_->object_store()->set_sticky_error(result); |
| return false; |
| } |
| |
| |
| #if defined(DEBUG) |
| // static |
| void BaseIsolate::AssertCurrent(BaseIsolate* isolate) { |
| ASSERT(isolate == Isolate::Current()); |
| } |
| #endif // defined(DEBUG) |
| |
| #if defined(DEBUG) |
| #define REUSABLE_HANDLE_SCOPE_INIT(object) \ |
| reusable_##object##_handle_scope_active_(false), |
| #else |
| #define REUSABLE_HANDLE_SCOPE_INIT(object) |
| #endif // defined(DEBUG) |
| |
| #define REUSABLE_HANDLE_INITIALIZERS(object) \ |
| object##_handle_(NULL), |
| |
| Isolate::Isolate() |
| : store_buffer_(), |
| message_notify_callback_(NULL), |
| name_(NULL), |
| start_time_(OS::GetCurrentTimeMicros()), |
| main_port_(0), |
| heap_(NULL), |
| object_store_(NULL), |
| top_context_(Context::null()), |
| top_exit_frame_info_(0), |
| init_callback_data_(NULL), |
| environment_callback_(NULL), |
| library_tag_handler_(NULL), |
| api_state_(NULL), |
| stub_code_(NULL), |
| debugger_(NULL), |
| single_step_(false), |
| random_(), |
| simulator_(NULL), |
| long_jump_base_(NULL), |
| timer_list_(), |
| deopt_id_(0), |
| mutex_(new Mutex()), |
| stack_limit_(0), |
| saved_stack_limit_(0), |
| message_handler_(NULL), |
| spawn_state_(NULL), |
| is_runnable_(false), |
| gc_prologue_callback_(NULL), |
| gc_epilogue_callback_(NULL), |
| defer_finalization_count_(0), |
| deopt_context_(NULL), |
| stacktrace_(NULL), |
| stack_frame_index_(-1), |
| cha_used_(false), |
| object_id_ring_(NULL), |
| profiler_data_(NULL), |
| thread_state_(NULL), |
| next_(NULL), |
| REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_INITIALIZERS) |
| REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_SCOPE_INIT) |
| reusable_handles_() { |
| set_vm_tag(VMTag::kIdleTagId); |
| } |
| #undef REUSABLE_HANDLE_SCOPE_INIT |
| #undef REUSABLE_HANDLE_INITIALIZERS |
| |
| |
| Isolate::~Isolate() { |
| delete [] name_; |
| delete heap_; |
| delete object_store_; |
| delete api_state_; |
| delete stub_code_; |
| delete debugger_; |
| #if defined(USING_SIMULATOR) |
| delete simulator_; |
| #endif |
| delete mutex_; |
| mutex_ = NULL; // Fail fast if interrupts are scheduled on a dead isolate. |
| delete message_handler_; |
| message_handler_ = NULL; // Fail fast if we send messages to a dead isolate. |
| ASSERT(deopt_context_ == NULL); // No deopt in progress when isolate deleted. |
| delete spawn_state_; |
| } |
| |
| |
| void Isolate::SetCurrent(Isolate* current) { |
| Isolate* old_current = Current(); |
| if (old_current != NULL) { |
| old_current->set_vm_tag(VMTag::kIdleTagId); |
| old_current->set_thread_state(NULL); |
| Profiler::EndExecution(old_current); |
| } |
| Thread::SetThreadLocal(isolate_key, reinterpret_cast<uword>(current)); |
| if (current != NULL) { |
| ASSERT(current->thread_state() == NULL); |
| InterruptableThreadState* thread_state = |
| ThreadInterrupter::GetCurrentThreadState(); |
| #if defined(DEBUG) |
| CheckForDuplicateThreadState(thread_state); |
| #endif |
| Profiler::BeginExecution(current); |
| current->set_thread_state(thread_state); |
| current->set_vm_tag(VMTag::kVMTagId); |
| } |
| } |
| |
| |
| // The single thread local key which stores all the thread local data |
| // for a thread. Since an Isolate is the central repository for |
| // storing all isolate specific information a single thread local key |
| // is sufficient. |
| ThreadLocalKey Isolate::isolate_key = Thread::kUnsetThreadLocalKey; |
| |
| |
| void Isolate::InitOnce() { |
| ASSERT(isolate_key == Thread::kUnsetThreadLocalKey); |
| isolate_key = Thread::CreateThreadLocal(); |
| ASSERT(isolate_key != Thread::kUnsetThreadLocalKey); |
| create_callback_ = NULL; |
| isolates_list_monitor_ = new Monitor(); |
| ASSERT(isolates_list_monitor_ != NULL); |
| } |
| |
| |
| Isolate* Isolate::Init(const char* name_prefix) { |
| Isolate* result = new Isolate(); |
| ASSERT(result != NULL); |
| |
| // Setup for profiling. |
| Profiler::InitProfilingForIsolate(result); |
| |
| // Add to isolate list. |
| AddIsolateTolist(result); |
| |
| // TODO(5411455): For now just set the recently created isolate as |
| // the current isolate. |
| SetCurrent(result); |
| |
| // Setup the isolate specific resuable handles. |
| #define REUSABLE_HANDLE_ALLOCATION(object) \ |
| result->object##_handle_ = result->AllocateReusableHandle<object>(); |
| REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_ALLOCATION) |
| #undef REUSABLE_HANDLE_ALLOCATION |
| |
| // Setup the isolate message handler. |
| MessageHandler* handler = new IsolateMessageHandler(result); |
| ASSERT(handler != NULL); |
| result->set_message_handler(handler); |
| |
| // Setup the Dart API state. |
| ApiState* state = new ApiState(); |
| ASSERT(state != NULL); |
| result->set_api_state(state); |
| |
| // Initialize stack top and limit in case we are running the isolate in the |
| // main thread. |
| // TODO(5411455): Need to figure out how to set the stack limit for the |
| // main thread. |
| result->SetStackLimitFromCurrentTOS(reinterpret_cast<uword>(&result)); |
| result->set_main_port(PortMap::CreatePort(result->message_handler())); |
| result->BuildName(name_prefix); |
| result->message_handler()->set_pause_on_start(FLAG_pause_isolates_on_start); |
| result->message_handler()->set_pause_on_exit(FLAG_pause_isolates_on_exit); |
| |
| result->debugger_ = new Debugger(); |
| result->debugger_->Initialize(result); |
| if (FLAG_trace_isolates) { |
| if (name_prefix == NULL || strcmp(name_prefix, "vm-isolate") != 0) { |
| OS::Print("[+] Starting isolate:\n" |
| "\tisolate: %s\n", result->name()); |
| } |
| } |
| |
| |
| return result; |
| } |
| |
| |
| void Isolate::BuildName(const char* name_prefix) { |
| ASSERT(name_ == NULL); |
| if (name_prefix == NULL) { |
| name_prefix = "isolate"; |
| } |
| const char* kFormat = "%s-%lld"; |
| intptr_t len = OS::SNPrint(NULL, 0, kFormat, name_prefix, main_port()) + 1; |
| name_ = new char[len]; |
| OS::SNPrint(name_, len, kFormat, name_prefix, main_port()); |
| } |
| |
| |
| // TODO(5411455): Use flag to override default value and Validate the |
| // stack size by querying OS. |
| uword Isolate::GetSpecifiedStackSize() { |
| ASSERT(Isolate::kStackSizeBuffer < Thread::GetMaxStackSize()); |
| uword stack_size = Thread::GetMaxStackSize() - Isolate::kStackSizeBuffer; |
| return stack_size; |
| } |
| |
| |
| void Isolate::SetStackLimitFromCurrentTOS(uword stack_top_value) { |
| #if defined(USING_SIMULATOR) |
| // Ignore passed-in native stack top and use Simulator stack top. |
| Simulator* sim = Simulator::Current(); // May allocate a simulator. |
| ASSERT(simulator() == sim); // This isolate's simulator is the current one. |
| stack_top_value = sim->StackTop(); |
| // The overflow area is accounted for by the simulator. |
| #endif |
| SetStackLimit(stack_top_value - GetSpecifiedStackSize()); |
| } |
| |
| |
| void Isolate::SetStackLimit(uword limit) { |
| MutexLocker ml(mutex_); |
| if (stack_limit_ == saved_stack_limit_) { |
| // No interrupt pending, set stack_limit_ too. |
| stack_limit_ = limit; |
| } |
| saved_stack_limit_ = limit; |
| } |
| |
| |
| bool Isolate::GetStackBounds(uword* lower, uword* upper) { |
| uword stack_lower = stack_limit(); |
| if (stack_lower == kUwordMax) { |
| stack_lower = saved_stack_limit(); |
| } |
| if (stack_lower == kUwordMax) { |
| return false; |
| } |
| uword stack_upper = stack_lower + GetSpecifiedStackSize(); |
| *lower = stack_lower; |
| *upper = stack_upper; |
| return true; |
| } |
| |
| |
| void Isolate::ScheduleInterrupts(uword interrupt_bits) { |
| // TODO(turnidge): Can't use MutexLocker here because MutexLocker is |
| // a StackResource, which requires a current isolate. Should |
| // MutexLocker really be a StackResource? |
| mutex_->Lock(); |
| ASSERT((interrupt_bits & ~kInterruptsMask) == 0); // Must fit in mask. |
| if (stack_limit_ == saved_stack_limit_) { |
| stack_limit_ = (~static_cast<uword>(0)) & ~kInterruptsMask; |
| } |
| stack_limit_ |= interrupt_bits; |
| mutex_->Unlock(); |
| } |
| |
| |
| bool Isolate::MakeRunnable() { |
| ASSERT(Isolate::Current() == NULL); |
| // Can't use MutexLocker here because MutexLocker is |
| // a StackResource, which requires a current isolate. |
| mutex_->Lock(); |
| // Check if we are in a valid state to make the isolate runnable. |
| if (is_runnable_ == true) { |
| mutex_->Unlock(); |
| return false; // Already runnable. |
| } |
| // Set the isolate as runnable and if we are being spawned schedule |
| // isolate on thread pool for execution. |
| is_runnable_ = true; |
| IsolateSpawnState* state = spawn_state(); |
| if (state != NULL) { |
| ASSERT(this == state->isolate()); |
| Run(); |
| } |
| mutex_->Unlock(); |
| return true; |
| } |
| |
| |
| static void StoreError(Isolate* isolate, const Object& obj) { |
| ASSERT(obj.IsError()); |
| isolate->object_store()->set_sticky_error(Error::Cast(obj)); |
| } |
| |
| |
| static bool RunIsolate(uword parameter) { |
| Isolate* isolate = reinterpret_cast<Isolate*>(parameter); |
| IsolateSpawnState* state = NULL; |
| { |
| // TODO(turnidge): Is this locking required here at all anymore? |
| MutexLocker ml(isolate->mutex()); |
| state = isolate->spawn_state(); |
| } |
| { |
| StartIsolateScope start_scope(isolate); |
| StackZone zone(isolate); |
| HandleScope handle_scope(isolate); |
| if (!ClassFinalizer::ProcessPendingClasses()) { |
| // Error is in sticky error already. |
| return false; |
| } |
| |
| // Set up specific unhandled exception handler. |
| const String& callback_name = String::Handle( |
| isolate, String::New(state->exception_callback_name())); |
| isolate->object_store()-> |
| set_unhandled_exception_handler(callback_name); |
| |
| Object& result = Object::Handle(); |
| result = state->ResolveFunction(); |
| bool is_spawn_uri = state->is_spawn_uri(); |
| if (result.IsError()) { |
| StoreError(isolate, result); |
| return false; |
| } |
| ASSERT(result.IsFunction()); |
| Function& func = Function::Handle(isolate); |
| func ^= result.raw(); |
| func = func.ImplicitClosureFunction(); |
| |
| // Instead of directly invoking the entry point we call '_startIsolate' with |
| // the entry point as argument. The '_startIsolate' function will |
| // communicate with the spawner to receive the initial message before it |
| // executes the real entry point. |
| // Since this function ("RunIsolate") is used for both Isolate.spawn and |
| // Isolate.spawnUri we also send a boolean flag as argument so that the |
| // "_startIsolate" function can act corresponding to how the isolate was |
| // created. |
| const Array& args = Array::Handle(Array::New(2)); |
| args.SetAt(0, Instance::Handle(func.ImplicitStaticClosure())); |
| args.SetAt(1, is_spawn_uri ? Bool::True() : Bool::False()); |
| |
| const Library& lib = Library::Handle(Library::IsolateLibrary()); |
| const String& entry_name = String::Handle(String::New("_startIsolate")); |
| const Function& entry_point = |
| Function::Handle(lib.LookupLocalFunction(entry_name)); |
| ASSERT(entry_point.IsFunction() && !entry_point.IsNull()); |
| |
| result = DartEntry::InvokeFunction(entry_point, args); |
| if (result.IsError()) { |
| StoreError(isolate, result); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| |
| static void ShutdownIsolate(uword parameter) { |
| Isolate* isolate = reinterpret_cast<Isolate*>(parameter); |
| { |
| // Print the error if there is one. This may execute dart code to |
| // print the exception object, so we need to use a StartIsolateScope. |
| StartIsolateScope start_scope(isolate); |
| StackZone zone(isolate); |
| HandleScope handle_scope(isolate); |
| Error& error = Error::Handle(); |
| error = isolate->object_store()->sticky_error(); |
| if (!error.IsNull()) { |
| OS::PrintErr("in ShutdownIsolate: %s\n", error.ToErrorCString()); |
| } |
| Dart::RunShutdownCallback(); |
| } |
| { |
| // Shut the isolate down. |
| SwitchIsolateScope switch_scope(isolate); |
| Dart::ShutdownIsolate(); |
| } |
| } |
| |
| |
| void Isolate::Run() { |
| message_handler()->Run(Dart::thread_pool(), |
| RunIsolate, |
| ShutdownIsolate, |
| reinterpret_cast<uword>(this)); |
| } |
| |
| |
| uword Isolate::GetAndClearInterrupts() { |
| MutexLocker ml(mutex_); |
| if (stack_limit_ == saved_stack_limit_) { |
| return 0; // No interrupt was requested. |
| } |
| uword interrupt_bits = stack_limit_ & kInterruptsMask; |
| stack_limit_ = saved_stack_limit_; |
| return interrupt_bits; |
| } |
| |
| |
| static int MostUsedFunctionFirst(const Function* const* a, |
| const Function* const* b) { |
| if ((*a)->usage_counter() > (*b)->usage_counter()) { |
| return -1; |
| } else if ((*a)->usage_counter() < (*b)->usage_counter()) { |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| |
| |
| static void AddFunctionsFromClass(const Class& cls, |
| GrowableArray<const Function*>* functions) { |
| const Array& class_functions = Array::Handle(cls.functions()); |
| // Class 'dynamic' is allocated/initialized in a special way, leaving |
| // the functions field NULL instead of empty. |
| const int func_len = class_functions.IsNull() ? 0 : class_functions.Length(); |
| for (int j = 0; j < func_len; j++) { |
| Function& function = Function::Handle(); |
| function ^= class_functions.At(j); |
| if (function.usage_counter() > 0) { |
| functions->Add(&function); |
| } |
| } |
| } |
| |
| |
| void Isolate::PrintInvokedFunctions() { |
| ASSERT(this == Isolate::Current()); |
| const GrowableObjectArray& libraries = |
| GrowableObjectArray::Handle(object_store()->libraries()); |
| Library& library = Library::Handle(); |
| GrowableArray<const Function*> invoked_functions; |
| for (int i = 0; i < libraries.Length(); i++) { |
| library ^= libraries.At(i); |
| Class& cls = Class::Handle(); |
| ClassDictionaryIterator iter(library, |
| ClassDictionaryIterator::kIteratePrivate); |
| while (iter.HasNext()) { |
| cls = iter.GetNextClass(); |
| AddFunctionsFromClass(cls, &invoked_functions); |
| } |
| } |
| invoked_functions.Sort(MostUsedFunctionFirst); |
| for (int i = 0; i < invoked_functions.length(); i++) { |
| OS::Print("%10" Pd " x %s\n", |
| invoked_functions[i]->usage_counter(), |
| invoked_functions[i]->ToFullyQualifiedCString()); |
| } |
| } |
| |
| |
| class FinalizeWeakPersistentHandlesVisitor : public HandleVisitor { |
| public: |
| FinalizeWeakPersistentHandlesVisitor() : HandleVisitor(Isolate::Current()) { |
| } |
| |
| void VisitHandle(uword addr) { |
| FinalizablePersistentHandle* handle = |
| reinterpret_cast<FinalizablePersistentHandle*>(addr); |
| handle->UpdateUnreachable(isolate()); |
| } |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(FinalizeWeakPersistentHandlesVisitor); |
| }; |
| |
| |
| void Isolate::Shutdown() { |
| ASSERT(this == Isolate::Current()); |
| ASSERT(top_resource() == NULL); |
| ASSERT((heap_ == NULL) || heap_->Verify()); |
| |
| // Create an area where we do have a zone and a handle scope so that we can |
| // call VM functions while tearing this isolate down. |
| { |
| StackZone stack_zone(this); |
| HandleScope handle_scope(this); |
| |
| // Clean up debugger resources. |
| debugger()->Shutdown(); |
| |
| // Close all the ports owned by this isolate. |
| PortMap::ClosePorts(message_handler()); |
| |
| // Fail fast if anybody tries to post any more messsages to this isolate. |
| delete message_handler(); |
| set_message_handler(NULL); |
| |
| // Dump all accumalated timer data for the isolate. |
| timer_list_.ReportTimers(); |
| if (FLAG_report_usage_count) { |
| PrintInvokedFunctions(); |
| } |
| |
| // Write out profiler data if requested. |
| Profiler::WriteProfile(this); |
| |
| // Write out the coverage data if collection has been enabled. |
| CodeCoverage::Write(this); |
| |
| // Finalize any weak persistent handles with a non-null referent. |
| FinalizeWeakPersistentHandlesVisitor visitor; |
| api_state()->weak_persistent_handles().VisitHandles(&visitor); |
| api_state()->prologue_weak_persistent_handles().VisitHandles(&visitor); |
| |
| CompilerStats::Print(); |
| if (FLAG_trace_isolates) { |
| heap()->PrintSizes(); |
| megamorphic_cache_table()->PrintSizes(); |
| Symbols::DumpStats(); |
| OS::Print("[-] Stopping isolate:\n" |
| "\tisolate: %s\n", name()); |
| } |
| } |
| |
| // TODO(5411455): For now just make sure there are no current isolates |
| // as we are shutting down the isolate. |
| SetCurrent(NULL); |
| RemoveIsolateFromList(this); |
| Profiler::ShutdownProfilingForIsolate(this); |
| } |
| |
| |
| Dart_IsolateCreateCallback Isolate::create_callback_ = NULL; |
| Dart_IsolateInterruptCallback Isolate::interrupt_callback_ = NULL; |
| Dart_IsolateUnhandledExceptionCallback |
| Isolate::unhandled_exception_callback_ = NULL; |
| Dart_IsolateShutdownCallback Isolate::shutdown_callback_ = NULL; |
| Dart_FileOpenCallback Isolate::file_open_callback_ = NULL; |
| Dart_FileReadCallback Isolate::file_read_callback_ = NULL; |
| Dart_FileWriteCallback Isolate::file_write_callback_ = NULL; |
| Dart_FileCloseCallback Isolate::file_close_callback_ = NULL; |
| Dart_EntropySource Isolate::entropy_source_callback_ = NULL; |
| Dart_IsolateInterruptCallback Isolate::vmstats_callback_ = NULL; |
| Dart_ServiceIsolateCreateCalback Isolate::service_create_callback_ = NULL; |
| |
| Monitor* Isolate::isolates_list_monitor_ = NULL; |
| Isolate* Isolate::isolates_list_head_ = NULL; |
| |
| |
| void Isolate::VisitObjectPointers(ObjectPointerVisitor* visitor, |
| bool visit_prologue_weak_handles, |
| bool validate_frames) { |
| ASSERT(visitor != NULL); |
| |
| // Visit objects in the object store. |
| object_store()->VisitObjectPointers(visitor); |
| |
| // Visit objects in the class table. |
| class_table()->VisitObjectPointers(visitor); |
| |
| // Visit objects in the megamorphic cache. |
| megamorphic_cache_table()->VisitObjectPointers(visitor); |
| |
| // Visit objects in per isolate stubs. |
| StubCode::VisitObjectPointers(visitor); |
| |
| // Visit objects in zones. |
| current_zone()->VisitObjectPointers(visitor); |
| |
| // Visit objects in isolate specific handles area. |
| reusable_handles_.VisitObjectPointers(visitor); |
| |
| // Iterate over all the stack frames and visit objects on the stack. |
| StackFrameIterator frames_iterator(validate_frames); |
| StackFrame* frame = frames_iterator.NextFrame(); |
| while (frame != NULL) { |
| frame->VisitObjectPointers(visitor); |
| frame = frames_iterator.NextFrame(); |
| } |
| |
| // Visit the dart api state for all local and persistent handles. |
| if (api_state() != NULL) { |
| api_state()->VisitObjectPointers(visitor, visit_prologue_weak_handles); |
| } |
| |
| // Visit the top context which is stored in the isolate. |
| visitor->VisitPointer(reinterpret_cast<RawObject**>(&top_context_)); |
| |
| // Visit objects in the debugger. |
| debugger()->VisitObjectPointers(visitor); |
| |
| // Visit objects that are being used for deoptimization. |
| if (deopt_context() != NULL) { |
| deopt_context()->VisitObjectPointers(visitor); |
| } |
| } |
| |
| |
| void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor, |
| bool visit_prologue_weak_handles) { |
| if (api_state() != NULL) { |
| api_state()->VisitWeakHandles(visitor, visit_prologue_weak_handles); |
| } |
| } |
| |
| |
| void Isolate::PrintToJSONStream(JSONStream* stream, bool ref) { |
| JSONObject jsobj(stream); |
| jsobj.AddProperty("type", (ref ? "@Isolate" : "Isolate")); |
| jsobj.AddPropertyF("id", "isolates/%" Pd "", |
| static_cast<intptr_t>(main_port())); |
| jsobj.AddPropertyF("mainPort", "%" Pd "", |
| static_cast<intptr_t>(main_port())); |
| |
| // Assign an isolate name based on the entry function. |
| IsolateSpawnState* state = spawn_state(); |
| if (state == NULL) { |
| jsobj.AddPropertyF("name", "root"); |
| } else if (state->class_name() != NULL) { |
| jsobj.AddPropertyF("name", "%s.%s", |
| state->class_name(), |
| state->function_name()); |
| } else { |
| jsobj.AddPropertyF("name", "%s", state->function_name()); |
| } |
| if (ref) { |
| return; |
| } |
| if (state != NULL) { |
| const Object& entry = Object::Handle(this, state->ResolveFunction()); |
| if (!entry.IsNull() && entry.IsFunction()) { |
| Function& func = Function::Handle(this); |
| func ^= entry.raw(); |
| jsobj.AddProperty("entry", func); |
| } |
| } |
| { |
| JSONObject jsheap(&jsobj, "heap"); |
| jsheap.AddProperty("usedNew", heap()->UsedInWords(Heap::kNew)); |
| jsheap.AddProperty("capacityNew", heap()->CapacityInWords(Heap::kNew)); |
| jsheap.AddProperty("usedOld", heap()->UsedInWords(Heap::kOld)); |
| jsheap.AddProperty("capacityOld", heap()->CapacityInWords(Heap::kOld)); |
| } |
| |
| DebuggerStackTrace* stack = debugger()->StackTrace(); |
| if (stack->Length() > 0) { |
| JSONObject jsframe(&jsobj, "topFrame"); |
| |
| ActivationFrame* frame = stack->FrameAt(0); |
| frame->PrintToJSONObject(&jsobj); |
| // TODO(turnidge): Implement depth differently -- differentiate |
| // inlined frames. |
| jsobj.AddProperty("depth", (intptr_t)0); |
| } |
| intptr_t live_ports = message_handler()->live_ports(); |
| intptr_t control_ports = message_handler()->control_ports(); |
| bool paused_on_exit = message_handler()->paused_on_exit(); |
| bool pause_on_start = message_handler()->pause_on_start(); |
| bool pause_on_exit = message_handler()->pause_on_exit(); |
| jsobj.AddProperty("livePorts", live_ports); |
| jsobj.AddProperty("controlPorts", control_ports); |
| jsobj.AddProperty("pausedOnStart", pause_on_start); |
| jsobj.AddProperty("pausedOnExit", paused_on_exit); |
| jsobj.AddProperty("pauseOnExit", pause_on_exit); |
| const Library& lib = |
| Library::Handle(object_store()->root_library()); |
| jsobj.AddProperty("rootLib", lib); |
| |
| timer_list().PrintTimersToJSONProperty(&jsobj); |
| |
| if (object_store()->sticky_error() != Object::null()) { |
| Error& error = Error::Handle(this, object_store()->sticky_error()); |
| ASSERT(!error.IsNull()); |
| jsobj.AddProperty("error", error, false); |
| } |
| |
| { |
| JSONObject typeargsRef(&jsobj, "canonicalTypeArguments"); |
| typeargsRef.AddProperty("type", "@TypeArgumentsList"); |
| typeargsRef.AddProperty("id", "typearguments"); |
| typeargsRef.AddProperty("name", "canonical type arguments"); |
| } |
| } |
| |
| |
| void Isolate::ProfileInterrupt() { |
| InterruptableThreadState* state = thread_state(); |
| if (state == NULL) { |
| // Isolate is not scheduled on a thread. |
| ProfileIdle(); |
| return; |
| } |
| ASSERT(state->id != Thread::kInvalidThreadId); |
| ThreadInterrupter::InterruptThread(state); |
| } |
| |
| |
| void Isolate::ProfileIdle() { |
| vm_tag_counters_.Increment(vm_tag()); |
| } |
| |
| |
| void Isolate::VisitIsolates(IsolateVisitor* visitor) { |
| if (visitor == NULL) { |
| return; |
| } |
| MonitorLocker ml(isolates_list_monitor_); |
| Isolate* current = isolates_list_head_; |
| while (current) { |
| visitor->VisitIsolate(current); |
| current = current->next_; |
| } |
| } |
| |
| |
| void Isolate::AddIsolateTolist(Isolate* isolate) { |
| MonitorLocker ml(isolates_list_monitor_); |
| ASSERT(isolate != NULL); |
| ASSERT(isolate->next_ == NULL); |
| isolate->next_ = isolates_list_head_; |
| isolates_list_head_ = isolate; |
| } |
| |
| |
| void Isolate::RemoveIsolateFromList(Isolate* isolate) { |
| MonitorLocker ml(isolates_list_monitor_); |
| ASSERT(isolate != NULL); |
| if (isolate == isolates_list_head_) { |
| isolates_list_head_ = isolate->next_; |
| return; |
| } |
| Isolate* previous = NULL; |
| Isolate* current = isolates_list_head_; |
| while (current) { |
| if (current == isolate) { |
| ASSERT(previous != NULL); |
| previous->next_ = current->next_; |
| return; |
| } |
| previous = current; |
| current = current->next_; |
| } |
| UNREACHABLE(); |
| } |
| |
| |
| #if defined(DEBUG) |
| void Isolate::CheckForDuplicateThreadState(InterruptableThreadState* state) { |
| MonitorLocker ml(isolates_list_monitor_); |
| ASSERT(state != NULL); |
| Isolate* current = isolates_list_head_; |
| while (current) { |
| ASSERT(current->thread_state() != state); |
| current = current->next_; |
| } |
| } |
| #endif |
| |
| |
| template<class T> |
| T* Isolate::AllocateReusableHandle() { |
| T* handle = reinterpret_cast<T*>(reusable_handles_.AllocateScopedHandle()); |
| T::initializeHandle(handle, T::null()); |
| return handle; |
| } |
| |
| |
| IsolateSpawnState::IsolateSpawnState(const Function& func) |
| : isolate_(NULL), |
| script_url_(NULL), |
| library_url_(NULL), |
| class_name_(NULL), |
| function_name_(NULL), |
| exception_callback_name_(NULL) { |
| script_url_ = NULL; |
| const Class& cls = Class::Handle(func.Owner()); |
| const Library& lib = Library::Handle(cls.library()); |
| const String& lib_url = String::Handle(lib.url()); |
| library_url_ = strdup(lib_url.ToCString()); |
| |
| const String& func_name = String::Handle(func.name()); |
| function_name_ = strdup(func_name.ToCString()); |
| if (!cls.IsTopLevel()) { |
| const String& class_name = String::Handle(cls.Name()); |
| class_name_ = strdup(class_name.ToCString()); |
| } |
| exception_callback_name_ = strdup("_unhandledExceptionCallback"); |
| } |
| |
| |
| IsolateSpawnState::IsolateSpawnState(const char* script_url) |
| : isolate_(NULL), |
| library_url_(NULL), |
| class_name_(NULL), |
| function_name_(NULL), |
| exception_callback_name_(NULL) { |
| script_url_ = strdup(script_url); |
| library_url_ = NULL; |
| function_name_ = strdup("main"); |
| exception_callback_name_ = strdup("_unhandledExceptionCallback"); |
| } |
| |
| |
| IsolateSpawnState::~IsolateSpawnState() { |
| free(script_url_); |
| free(library_url_); |
| free(function_name_); |
| free(class_name_); |
| free(exception_callback_name_); |
| } |
| |
| |
| RawObject* IsolateSpawnState::ResolveFunction() { |
| // Resolve the library. |
| Library& lib = Library::Handle(); |
| if (library_url()) { |
| const String& lib_url = String::Handle(String::New(library_url())); |
| lib = Library::LookupLibrary(lib_url); |
| if (lib.IsNull() || lib.IsError()) { |
| const String& msg = String::Handle(String::NewFormatted( |
| "Unable to find library '%s'.", library_url())); |
| return LanguageError::New(msg); |
| } |
| } else { |
| lib = isolate()->object_store()->root_library(); |
| } |
| ASSERT(!lib.IsNull()); |
| |
| // Resolve the function. |
| const String& func_name = String::Handle(String::New(function_name())); |
| |
| if (class_name() == NULL) { |
| const Function& func = Function::Handle(lib.LookupLocalFunction(func_name)); |
| if (func.IsNull()) { |
| const String& msg = String::Handle(String::NewFormatted( |
| "Unable to resolve function '%s' in library '%s'.", |
| function_name(), |
| (library_url() != NULL ? library_url() : script_url()))); |
| return LanguageError::New(msg); |
| } |
| return func.raw(); |
| } |
| |
| const String& cls_name = String::Handle(String::New(class_name())); |
| const Class& cls = Class::Handle(lib.LookupLocalClass(cls_name)); |
| if (cls.IsNull()) { |
| const String& msg = String::Handle(String::NewFormatted( |
| "Unable to resolve class '%s' in library '%s'.", |
| class_name(), |
| (library_url() != NULL ? library_url() : script_url()))); |
| return LanguageError::New(msg); |
| } |
| const Function& func = |
| Function::Handle(cls.LookupStaticFunctionAllowPrivate(func_name)); |
| if (func.IsNull()) { |
| const String& msg = String::Handle(String::NewFormatted( |
| "Unable to resolve static method '%s.%s' in library '%s'.", |
| class_name(), function_name(), |
| (library_url() != NULL ? library_url() : script_url()))); |
| return LanguageError::New(msg); |
| } |
| return func.raw(); |
| } |
| |
| |
| void IsolateSpawnState::Cleanup() { |
| SwitchIsolateScope switch_scope(isolate()); |
| Dart::ShutdownIsolate(); |
| } |
| |
| } // namespace dart |