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ab18829ae4
Comitted by mistake. Review URL: https://codereview.chromium.org//73893004 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@30301 260f80e4-7a28-3924-810f-c04153c831b5
1070 lines
33 KiB
C++
1070 lines
33 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/isolate.h"
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#include "include/dart_api.h"
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#include "platform/assert.h"
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#include "platform/json.h"
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#include "lib/mirrors.h"
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#include "vm/code_observers.h"
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#include "vm/compiler_stats.h"
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#include "vm/coverage.h"
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#include "vm/dart_api_state.h"
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#include "vm/dart_entry.h"
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#include "vm/debugger.h"
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#include "vm/deopt_instructions.h"
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#include "vm/heap.h"
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#include "vm/heap_histogram.h"
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#include "vm/message_handler.h"
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#include "vm/object_id_ring.h"
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#include "vm/object_store.h"
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#include "vm/parser.h"
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#include "vm/port.h"
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#include "vm/reusable_handles.h"
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#include "vm/service.h"
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#include "vm/simulator.h"
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#include "vm/stack_frame.h"
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#include "vm/stub_code.h"
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#include "vm/symbols.h"
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#include "vm/thread.h"
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#include "vm/timer.h"
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#include "vm/visitor.h"
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namespace dart {
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DEFINE_FLAG(bool, report_usage_count, false,
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"Track function usage and report.");
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DEFINE_FLAG(bool, trace_isolates, false,
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"Trace isolate creation and shut down.");
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void Isolate::RegisterClass(const Class& cls) {
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class_table()->Register(cls);
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if (object_histogram() != NULL) object_histogram()->RegisterClass(cls);
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}
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class IsolateMessageHandler : public MessageHandler {
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public:
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explicit IsolateMessageHandler(Isolate* isolate);
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~IsolateMessageHandler();
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const char* name() const;
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void MessageNotify(Message::Priority priority);
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bool HandleMessage(Message* message);
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#if defined(DEBUG)
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// Check that it is safe to access this handler.
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void CheckAccess();
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#endif
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bool IsCurrentIsolate() const;
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virtual Isolate* GetIsolate() const { return isolate_; }
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bool UnhandledExceptionCallbackHandler(const Object& message,
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const UnhandledException& error);
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private:
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bool ProcessUnhandledException(const Object& message, const Error& result);
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RawFunction* ResolveCallbackFunction();
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Isolate* isolate_;
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};
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IsolateMessageHandler::IsolateMessageHandler(Isolate* isolate)
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: isolate_(isolate) {
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}
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IsolateMessageHandler::~IsolateMessageHandler() {
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}
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const char* IsolateMessageHandler::name() const {
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return isolate_->name();
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}
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void IsolateMessageHandler::MessageNotify(Message::Priority priority) {
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if (priority >= Message::kOOBPriority) {
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// Handle out of band messages even if the isolate is busy.
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isolate_->ScheduleInterrupts(Isolate::kMessageInterrupt);
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}
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Dart_MessageNotifyCallback callback = isolate_->message_notify_callback();
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if (callback) {
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// Allow the embedder to handle message notification.
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(*callback)(Api::CastIsolate(isolate_));
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}
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}
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bool IsolateMessageHandler::HandleMessage(Message* message) {
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StartIsolateScope start_scope(isolate_);
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StackZone zone(isolate_);
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HandleScope handle_scope(isolate_);
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// If the message is in band we lookup the receive port to dispatch to. If
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// the receive port is closed, we drop the message without deserializing it.
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Object& receive_port = Object::Handle();
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if (!message->IsOOB()) {
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receive_port = DartLibraryCalls::LookupReceivePort(message->dest_port());
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if (receive_port.IsError()) {
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return ProcessUnhandledException(Object::null_instance(),
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Error::Cast(receive_port));
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}
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if (receive_port.IsNull()) {
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delete message;
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return true;
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}
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}
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// Parse the message.
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SnapshotReader reader(message->data(), message->len(),
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Snapshot::kMessage, Isolate::Current());
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const Object& msg_obj = Object::Handle(reader.ReadObject());
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if (msg_obj.IsError()) {
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// An error occurred while reading the message.
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return ProcessUnhandledException(Object::null_instance(),
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Error::Cast(msg_obj));
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}
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if (!msg_obj.IsNull() && !msg_obj.IsInstance()) {
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// TODO(turnidge): We need to decide what an isolate does with
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// malformed messages. If they (eventually) come from a remote
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// machine, then it might make sense to drop the message entirely.
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// In the case that the message originated locally, which is
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// always true for now, then this should never occur.
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UNREACHABLE();
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}
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Instance& msg = Instance::Handle();
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msg ^= msg_obj.raw(); // Can't use Instance::Cast because may be null.
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bool success = true;
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if (message->IsOOB()) {
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Service::HandleServiceMessage(isolate_, message->reply_port(), msg);
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} else {
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const Object& result = Object::Handle(
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DartLibraryCalls::HandleMessage(
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receive_port, message->reply_port(), msg));
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if (result.IsError()) {
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success = ProcessUnhandledException(msg, Error::Cast(result));
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} else {
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ASSERT(result.IsNull());
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}
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}
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delete message;
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return success;
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}
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RawFunction* IsolateMessageHandler::ResolveCallbackFunction() {
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ASSERT(isolate_->object_store()->unhandled_exception_handler() != NULL);
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String& callback_name = String::Handle(isolate_);
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if (isolate_->object_store()->unhandled_exception_handler() !=
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String::null()) {
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callback_name = isolate_->object_store()->unhandled_exception_handler();
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} else {
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callback_name = String::New("_unhandledExceptionCallback");
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}
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Library& lib =
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Library::Handle(isolate_, isolate_->object_store()->isolate_library());
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Function& func =
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Function::Handle(isolate_, lib.LookupLocalFunction(callback_name));
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if (func.IsNull()) {
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lib = isolate_->object_store()->root_library();
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func = lib.LookupLocalFunction(callback_name);
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}
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return func.raw();
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}
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bool IsolateMessageHandler::UnhandledExceptionCallbackHandler(
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const Object& message, const UnhandledException& error) {
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const Instance& cause = Instance::Handle(isolate_, error.exception());
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const Instance& stacktrace =
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Instance::Handle(isolate_, error.stacktrace());
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// Wrap these args into an IsolateUncaughtException object.
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const Array& exception_args = Array::Handle(Array::New(3));
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exception_args.SetAt(0, message);
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exception_args.SetAt(1, cause);
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exception_args.SetAt(2, stacktrace);
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const Object& exception =
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Object::Handle(isolate_,
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Exceptions::Create(Exceptions::kIsolateUnhandledException,
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exception_args));
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if (exception.IsError()) {
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return false;
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}
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ASSERT(exception.IsInstance());
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// Invoke script's callback function.
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Object& function = Object::Handle(isolate_, ResolveCallbackFunction());
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if (function.IsNull() || function.IsError()) {
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return false;
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}
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const Array& callback_args = Array::Handle(Array::New(1));
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callback_args.SetAt(0, exception);
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const Object& result =
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Object::Handle(DartEntry::InvokeFunction(Function::Cast(function),
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callback_args));
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if (result.IsError()) {
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const Error& err = Error::Cast(result);
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OS::PrintErr("failed calling unhandled exception callback: %s\n",
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err.ToErrorCString());
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return false;
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}
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ASSERT(result.IsBool());
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bool continue_from_exception = Bool::Cast(result).value();
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if (continue_from_exception) {
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isolate_->object_store()->clear_sticky_error();
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}
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return continue_from_exception;
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}
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#if defined(DEBUG)
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void IsolateMessageHandler::CheckAccess() {
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ASSERT(IsCurrentIsolate());
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}
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#endif
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bool IsolateMessageHandler::IsCurrentIsolate() const {
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return (isolate_ == Isolate::Current());
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}
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bool IsolateMessageHandler::ProcessUnhandledException(
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const Object& message, const Error& result) {
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if (result.IsUnhandledException()) {
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// Invoke the isolate's uncaught exception handler, if it exists.
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const UnhandledException& error = UnhandledException::Cast(result);
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RawInstance* exception = error.exception();
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if ((exception != isolate_->object_store()->out_of_memory()) &&
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(exception != isolate_->object_store()->stack_overflow())) {
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if (UnhandledExceptionCallbackHandler(message, error)) {
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return true;
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}
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}
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}
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// Invoke the isolate's unhandled exception callback if there is one.
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if (Isolate::UnhandledExceptionCallback() != NULL) {
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Dart_EnterScope();
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Dart_Handle error = Api::NewHandle(isolate_, result.raw());
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(Isolate::UnhandledExceptionCallback())(error);
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Dart_ExitScope();
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}
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isolate_->object_store()->set_sticky_error(result);
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return false;
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}
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#if defined(DEBUG)
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// static
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void BaseIsolate::AssertCurrent(BaseIsolate* isolate) {
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ASSERT(isolate == Isolate::Current());
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}
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#endif
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#define REUSABLE_HANDLE_INITIALIZERS(object) \
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object##_handle_(NULL),
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Isolate::Isolate()
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: store_buffer_(),
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message_notify_callback_(NULL),
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name_(NULL),
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start_time_(OS::GetCurrentTimeMicros()),
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main_port_(0),
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heap_(NULL),
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object_store_(NULL),
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top_context_(Context::null()),
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top_exit_frame_info_(0),
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init_callback_data_(NULL),
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environment_callback_(NULL),
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library_tag_handler_(NULL),
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api_state_(NULL),
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stub_code_(NULL),
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debugger_(NULL),
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single_step_(false),
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random_(),
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simulator_(NULL),
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long_jump_base_(NULL),
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timer_list_(),
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deopt_id_(0),
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mutex_(new Mutex()),
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stack_limit_(0),
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saved_stack_limit_(0),
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message_handler_(NULL),
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spawn_data_(0),
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is_runnable_(false),
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gc_prologue_callbacks_(),
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gc_epilogue_callbacks_(),
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defer_finalization_count_(0),
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deopt_context_(NULL),
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stacktrace_(NULL),
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stack_frame_index_(-1),
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object_histogram_(NULL),
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object_id_ring_(NULL),
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REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_INITIALIZERS)
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reusable_handles_() {
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if (FLAG_print_object_histogram && (Dart::vm_isolate() != NULL)) {
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object_histogram_ = new ObjectHistogram(this);
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}
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}
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#undef REUSABLE_HANDLE_INITIALIZERS
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Isolate::~Isolate() {
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delete [] name_;
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delete heap_;
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delete object_store_;
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delete api_state_;
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delete stub_code_;
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delete debugger_;
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#if defined(USING_SIMULATOR)
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delete simulator_;
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#endif
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delete mutex_;
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mutex_ = NULL; // Fail fast if interrupts are scheduled on a dead isolate.
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delete message_handler_;
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message_handler_ = NULL; // Fail fast if we send messages to a dead isolate.
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ASSERT(deopt_context_ == NULL); // No deopt in progress when isolate deleted.
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delete object_histogram_;
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}
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void Isolate::SetCurrent(Isolate* current) {
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Thread::SetThreadLocal(isolate_key, reinterpret_cast<uword>(current));
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}
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// The single thread local key which stores all the thread local data
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// for a thread. Since an Isolate is the central repository for
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// storing all isolate specific information a single thread local key
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// is sufficient.
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ThreadLocalKey Isolate::isolate_key = Thread::kUnsetThreadLocalKey;
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void Isolate::InitOnce() {
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ASSERT(isolate_key == Thread::kUnsetThreadLocalKey);
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isolate_key = Thread::CreateThreadLocal();
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ASSERT(isolate_key != Thread::kUnsetThreadLocalKey);
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create_callback_ = NULL;
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}
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Isolate* Isolate::Init(const char* name_prefix) {
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Isolate* result = new Isolate();
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ASSERT(result != NULL);
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// TODO(5411455): For now just set the recently created isolate as
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// the current isolate.
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SetCurrent(result);
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// Setup the isolate specific resuable handles.
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#define REUSABLE_HANDLE_ALLOCATION(object) \
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result->object##_handle_ = result->AllocateReusableHandle<object>(); \
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REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_ALLOCATION)
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#undef REUSABLE_HANDLE_ALLOCATION
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// Setup the isolate message handler.
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MessageHandler* handler = new IsolateMessageHandler(result);
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ASSERT(handler != NULL);
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result->set_message_handler(handler);
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// Setup the Dart API state.
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ApiState* state = new ApiState();
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ASSERT(state != NULL);
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result->set_api_state(state);
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// Initialize stack top and limit in case we are running the isolate in the
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// main thread.
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// TODO(5411455): Need to figure out how to set the stack limit for the
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// main thread.
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result->SetStackLimitFromCurrentTOS(reinterpret_cast<uword>(&result));
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result->set_main_port(PortMap::CreatePort(result->message_handler()));
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result->BuildName(name_prefix);
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result->debugger_ = new Debugger();
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result->debugger_->Initialize(result);
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if (FLAG_trace_isolates) {
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if (name_prefix == NULL || strcmp(name_prefix, "vm-isolate") != 0) {
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OS::Print("[+] Starting isolate:\n"
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"\tisolate: %s\n", result->name());
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}
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}
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return result;
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}
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void Isolate::BuildName(const char* name_prefix) {
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ASSERT(name_ == NULL);
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if (name_prefix == NULL) {
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name_prefix = "isolate";
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}
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const char* kFormat = "%s-%lld";
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intptr_t len = OS::SNPrint(NULL, 0, kFormat, name_prefix, main_port()) + 1;
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name_ = new char[len];
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OS::SNPrint(name_, len, kFormat, name_prefix, main_port());
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}
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// TODO(5411455): Use flag to override default value and Validate the
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// stack size by querying OS.
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uword Isolate::GetSpecifiedStackSize() {
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ASSERT(Isolate::kStackSizeBuffer < Thread::GetMaxStackSize());
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uword stack_size = Thread::GetMaxStackSize() - Isolate::kStackSizeBuffer;
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return stack_size;
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}
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void Isolate::SetStackLimitFromCurrentTOS(uword stack_top_value) {
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#if defined(USING_SIMULATOR)
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// Ignore passed-in native stack top and use Simulator stack top.
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Simulator* sim = Simulator::Current(); // May allocate a simulator.
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ASSERT(simulator() == sim); // This isolate's simulator is the current one.
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stack_top_value = sim->StackTop();
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// The overflow area is accounted for by the simulator.
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#endif
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SetStackLimit(stack_top_value - GetSpecifiedStackSize());
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}
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void Isolate::SetStackLimit(uword limit) {
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MutexLocker ml(mutex_);
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if (stack_limit_ == saved_stack_limit_) {
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// No interrupt pending, set stack_limit_ too.
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stack_limit_ = limit;
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}
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saved_stack_limit_ = limit;
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}
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void Isolate::ScheduleInterrupts(uword interrupt_bits) {
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// TODO(turnidge): Can't use MutexLocker here because MutexLocker is
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// a StackResource, which requires a current isolate. Should
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// MutexLocker really be a StackResource?
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mutex_->Lock();
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ASSERT((interrupt_bits & ~kInterruptsMask) == 0); // Must fit in mask.
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if (stack_limit_ == saved_stack_limit_) {
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stack_limit_ = (~static_cast<uword>(0)) & ~kInterruptsMask;
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}
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stack_limit_ |= interrupt_bits;
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mutex_->Unlock();
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}
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bool Isolate::MakeRunnable() {
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ASSERT(Isolate::Current() == NULL);
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// Can't use MutexLocker here because MutexLocker is
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// a StackResource, which requires a current isolate.
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mutex_->Lock();
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// Check if we are in a valid state to make the isolate runnable.
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if (is_runnable_ == true) {
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mutex_->Unlock();
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return false; // Already runnable.
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}
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// Set the isolate as runnable and if we are being spawned schedule
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// isolate on thread pool for execution.
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is_runnable_ = true;
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IsolateSpawnState* state = reinterpret_cast<IsolateSpawnState*>(spawn_data());
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if (state != NULL) {
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ASSERT(this == state->isolate());
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Run();
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}
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mutex_->Unlock();
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return true;
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}
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static void StoreError(Isolate* isolate, const Object& obj) {
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ASSERT(obj.IsError());
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isolate->object_store()->set_sticky_error(Error::Cast(obj));
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}
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static bool RunIsolate(uword parameter) {
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Isolate* isolate = reinterpret_cast<Isolate*>(parameter);
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IsolateSpawnState* state = NULL;
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{
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MutexLocker ml(isolate->mutex());
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state = reinterpret_cast<IsolateSpawnState*>(isolate->spawn_data());
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isolate->set_spawn_data(0);
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}
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{
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StartIsolateScope start_scope(isolate);
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StackZone zone(isolate);
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HandleScope handle_scope(isolate);
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if (!ClassFinalizer::FinalizePendingClasses()) {
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// Error is in sticky error already.
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return false;
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}
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// Set up specific unhandled exception handler.
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const String& callback_name = String::Handle(
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isolate, String::New(state->exception_callback_name()));
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isolate->object_store()->
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set_unhandled_exception_handler(callback_name);
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Object& result = Object::Handle();
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result = state->ResolveFunction();
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bool is_spawn_uri = state->is_spawn_uri();
|
|
delete state;
|
|
state = NULL;
|
|
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() {
|
|
}
|
|
|
|
void VisitHandle(uword addr) {
|
|
FinalizablePersistentHandle* handle =
|
|
reinterpret_cast<FinalizablePersistentHandle*>(addr);
|
|
FinalizablePersistentHandle::Finalize(handle);
|
|
}
|
|
|
|
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);
|
|
|
|
if (FLAG_print_object_histogram) {
|
|
heap()->CollectAllGarbage();
|
|
object_histogram()->Print();
|
|
}
|
|
|
|
// 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 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);
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
static Monitor* status_sync = NULL;
|
|
|
|
|
|
bool Isolate::FetchStacktrace() {
|
|
Isolate* isolate = Isolate::Current();
|
|
MonitorLocker ml(status_sync);
|
|
DebuggerStackTrace* stack = Debugger::CollectStackTrace();
|
|
TextBuffer buffer(256);
|
|
buffer.Printf("{ \"handle\": \"0x%" Px64 "\", \"stacktrace\": [ ",
|
|
reinterpret_cast<int64_t>(isolate));
|
|
intptr_t n_frames = stack->Length();
|
|
String& url = String::Handle();
|
|
String& function = String::Handle();
|
|
for (int i = 0; i < n_frames; i++) {
|
|
if (i > 0) {
|
|
buffer.Printf(", ");
|
|
}
|
|
ActivationFrame* frame = stack->FrameAt(i);
|
|
url ^= frame->SourceUrl();
|
|
function ^= frame->function().UserVisibleName();
|
|
buffer.Printf("{ \"url\": \"%s\", ", url.ToCString());
|
|
buffer.Printf("\"line\": %" Pd ", ", frame->LineNumber());
|
|
buffer.Printf("\"function\": \"%s\", ", function.ToCString());
|
|
|
|
const Code& code = frame->code();
|
|
buffer.Printf("\"code\": { ");
|
|
buffer.Printf("\"alive\": %s, ", code.is_alive() ? "false" : "true");
|
|
buffer.Printf("\"optimized\": %s }}",
|
|
code.is_optimized() ? "false" : "true");
|
|
}
|
|
buffer.Printf("]}");
|
|
isolate->stacktrace_ = OS::StrNDup(buffer.buf(), buffer.length());
|
|
ml.Notify();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool Isolate::FetchStackFrameDetails() {
|
|
Isolate* isolate = Isolate::Current();
|
|
ASSERT(isolate->stack_frame_index_ >= 0);
|
|
MonitorLocker ml(status_sync);
|
|
DebuggerStackTrace* stack = Debugger::CollectStackTrace();
|
|
intptr_t frame_index = isolate->stack_frame_index_;
|
|
if (frame_index >= stack->Length()) {
|
|
// Frame no longer available.
|
|
return false;
|
|
}
|
|
ActivationFrame* frame = stack->FrameAt(frame_index);
|
|
TextBuffer buffer(256);
|
|
buffer.Printf("{ \"handle\": \"0x%" Px64 "\", \"frame_index\": %" Pd ", ",
|
|
reinterpret_cast<int64_t>(isolate), frame_index);
|
|
|
|
const Code& code = frame->code();
|
|
buffer.Printf("\"code\": { \"size\": %" Pd ", ", code.Size());
|
|
buffer.Printf("\"alive\": %s, ", code.is_alive() ? "false" : "true");
|
|
buffer.Printf("\"optimized\": %s }, ",
|
|
code.is_optimized() ? "false" : "true");
|
|
// TODO(tball): add compilation stats (time, etc.), when available.
|
|
|
|
buffer.Printf("\"local_vars\": [ ");
|
|
intptr_t n_local_vars = frame->NumLocalVariables();
|
|
String& var_name = String::Handle();
|
|
Instance& value = Instance::Handle();
|
|
for (int i = 0; i < n_local_vars; i++) {
|
|
if (i > 0) {
|
|
buffer.Printf(", ");
|
|
}
|
|
intptr_t token_pos, end_pos;
|
|
frame->VariableAt(i, &var_name, &token_pos, &end_pos, &value);
|
|
buffer.Printf(
|
|
"{ \"name\": \"%s\", \"pos\": %" Pd ", \"end_pos\": %" Pd ", "
|
|
"\"value\": \"%s\" }",
|
|
var_name.ToCString(), token_pos, end_pos, value.ToCString());
|
|
}
|
|
buffer.Printf("]}");
|
|
isolate->stacktrace_ = OS::StrNDup(buffer.buf(), buffer.length());
|
|
ml.Notify();
|
|
return true;
|
|
}
|
|
|
|
|
|
char* Isolate::DoStacktraceInterrupt(Dart_IsolateInterruptCallback cb) {
|
|
ASSERT(stacktrace_ == NULL);
|
|
SetVmStatsCallback(cb);
|
|
if (status_sync == NULL) {
|
|
status_sync = new Monitor();
|
|
}
|
|
if (is_runnable()) {
|
|
ScheduleInterrupts(Isolate::kVmStatusInterrupt);
|
|
{
|
|
MonitorLocker ml(status_sync);
|
|
if (stacktrace_ == NULL) { // It may already be available.
|
|
ml.Wait(1000);
|
|
}
|
|
}
|
|
SetVmStatsCallback(NULL);
|
|
}
|
|
char* result = stacktrace_;
|
|
stacktrace_ = NULL;
|
|
if (result == NULL) {
|
|
// Return empty stack.
|
|
TextBuffer buffer(256);
|
|
buffer.Printf("{ \"handle\": \"0x%" Px64 "\", \"stacktrace\": []}",
|
|
reinterpret_cast<int64_t>(this));
|
|
|
|
result = OS::StrNDup(buffer.buf(), buffer.length());
|
|
}
|
|
ASSERT(result != NULL);
|
|
// result is freed by VmStats::WebServer().
|
|
return result;
|
|
}
|
|
|
|
|
|
char* Isolate::GetStatusStacktrace() {
|
|
return DoStacktraceInterrupt(&FetchStacktrace);
|
|
}
|
|
|
|
char* Isolate::GetStatusStackFrame(intptr_t index) {
|
|
ASSERT(index >= 0);
|
|
stack_frame_index_ = index;
|
|
char* result = DoStacktraceInterrupt(&FetchStackFrameDetails);
|
|
stack_frame_index_ = -1;
|
|
return result;
|
|
}
|
|
|
|
|
|
// Returns the isolate's general detail information.
|
|
char* Isolate::GetStatusDetails() {
|
|
const char* format = "{\n"
|
|
" \"handle\": \"0x%" Px64 "\",\n"
|
|
" \"name\": \"%s\",\n"
|
|
" \"port\": %" Pd ",\n"
|
|
" \"starttime\": %" Pd ",\n"
|
|
" \"stacklimit\": %" Pd ",\n"
|
|
" \"newspace\": {\n"
|
|
" \"used\": %" Pd ",\n"
|
|
" \"capacity\": %" Pd "\n"
|
|
" },\n"
|
|
" \"oldspace\": {\n"
|
|
" \"used\": %" Pd ",\n"
|
|
" \"capacity\": %" Pd "\n"
|
|
" }\n"
|
|
"}";
|
|
char buffer[300];
|
|
int64_t address = reinterpret_cast<int64_t>(this);
|
|
int n = OS::SNPrint(buffer, 300, format, address, name(), main_port(),
|
|
(start_time() / 1000L), saved_stack_limit(),
|
|
heap()->Used(Heap::kNew) / KB,
|
|
heap()->Capacity(Heap::kNew) / KB,
|
|
heap()->Used(Heap::kOld) / KB,
|
|
heap()->Capacity(Heap::kOld) / KB);
|
|
ASSERT(n < 300);
|
|
return strdup(buffer);
|
|
}
|
|
|
|
|
|
char* Isolate::GetStatus(const char* request) {
|
|
char* p = const_cast<char*>(request);
|
|
const char* service_type = "/isolate/";
|
|
ASSERT(!strncmp(p, service_type, strlen(service_type)));
|
|
p += strlen(service_type);
|
|
|
|
// Extract isolate handle.
|
|
int64_t addr;
|
|
OS::StringToInt64(p, &addr);
|
|
// TODO(tball): add validity check when issue 9600 is fixed.
|
|
Isolate* isolate = reinterpret_cast<Isolate*>(addr);
|
|
p += strcspn(p, "/");
|
|
|
|
// Query "/isolate/<handle>".
|
|
if (strlen(p) == 0) {
|
|
return isolate->GetStatusDetails();
|
|
}
|
|
|
|
// Query "/isolate/<handle>/stacktrace"
|
|
if (!strcmp(p, "/stacktrace")) {
|
|
return isolate->GetStatusStacktrace();
|
|
}
|
|
|
|
// Query "/isolate/<handle>/stacktrace/<frame-index>"
|
|
const char* stacktrace_query = "/stacktrace/";
|
|
int64_t frame_index = -1;
|
|
if (!strncmp(p, stacktrace_query, strlen(stacktrace_query))) {
|
|
p += strlen(stacktrace_query);
|
|
OS::StringToInt64(p, &frame_index);
|
|
if (frame_index >= 0) {
|
|
return isolate->GetStatusStackFrame(frame_index);
|
|
}
|
|
}
|
|
|
|
// TODO(tball): "/isolate/<handle>/stacktrace/<frame-index>"/disassemble"
|
|
|
|
return NULL; // Unimplemented query.
|
|
}
|
|
|
|
|
|
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),
|
|
function_name_(NULL),
|
|
exception_callback_name_(NULL) {
|
|
script_url_ = NULL;
|
|
const Class& cls = Class::Handle(func.Owner());
|
|
ASSERT(cls.IsTopLevel());
|
|
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());
|
|
exception_callback_name_ = strdup("_unhandledExceptionCallback");
|
|
}
|
|
|
|
|
|
IsolateSpawnState::IsolateSpawnState(const char* script_url)
|
|
: isolate_(NULL),
|
|
library_url_(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() {
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|
free(script_url_);
|
|
free(library_url_);
|
|
free(function_name_);
|
|
free(exception_callback_name_);
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|
}
|
|
|
|
|
|
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()));
|
|
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() ? library_url() : script_url())));
|
|
return LanguageError::New(msg);
|
|
}
|
|
return func.raw();
|
|
}
|
|
|
|
|
|
void IsolateSpawnState::Cleanup() {
|
|
SwitchIsolateScope switch_scope(isolate());
|
|
Dart::ShutdownIsolate();
|
|
}
|
|
|
|
} // namespace dart
|