mirror of
https://github.com/dart-lang/sdk
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f91f67a5be
Change-Id: Icd64913f0fc6ba54a0b8517bf05ae4babfae3bdc Reviewed-on: https://dart-review.googlesource.com/19287 Reviewed-by: Siva Annamalai <asiva@google.com>
533 lines
16 KiB
C++
533 lines
16 KiB
C++
// Copyright (c) 2015, 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/service_isolate.h"
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#include "vm/compiler/jit/compiler.h"
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#include "vm/dart_api_impl.h"
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#include "vm/dart_entry.h"
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#include "vm/isolate.h"
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#include "vm/lockers.h"
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#include "vm/message.h"
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#include "vm/message_handler.h"
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#include "vm/native_arguments.h"
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#include "vm/native_entry.h"
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#include "vm/object.h"
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#include "vm/object_store.h"
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#include "vm/port.h"
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#include "vm/service.h"
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#include "vm/symbols.h"
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#include "vm/thread_pool.h"
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#include "vm/timeline.h"
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namespace dart {
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#define Z (T->zone())
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DEFINE_FLAG(bool, trace_service, false, "Trace VM service requests.");
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DEFINE_FLAG(bool,
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trace_service_pause_events,
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false,
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"Trace VM service isolate pause events.");
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DEFINE_FLAG(bool,
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trace_service_verbose,
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false,
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"Provide extra service tracing information.");
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static uint8_t* malloc_allocator(uint8_t* ptr,
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intptr_t old_size,
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intptr_t new_size) {
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void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
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return reinterpret_cast<uint8_t*>(new_ptr);
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}
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static void malloc_deallocator(uint8_t* ptr) {
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free(reinterpret_cast<void*>(ptr));
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}
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// These must be kept in sync with service/constants.dart
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#define VM_SERVICE_ISOLATE_EXIT_MESSAGE_ID 0
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#define VM_SERVICE_ISOLATE_STARTUP_MESSAGE_ID 1
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#define VM_SERVICE_ISOLATE_SHUTDOWN_MESSAGE_ID 2
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#define VM_SERVICE_WEB_SERVER_CONTROL_MESSAGE_ID 3
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#define VM_SERVICE_SERVER_INFO_MESSAGE_ID 4
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static RawArray* MakeServiceControlMessage(Dart_Port port_id,
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intptr_t code,
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const String& name) {
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const Array& list = Array::Handle(Array::New(4));
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ASSERT(!list.IsNull());
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const Integer& code_int = Integer::Handle(Integer::New(code));
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const Integer& port_int = Integer::Handle(Integer::New(port_id));
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const SendPort& send_port = SendPort::Handle(SendPort::New(port_id));
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list.SetAt(0, code_int);
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list.SetAt(1, port_int);
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list.SetAt(2, send_port);
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list.SetAt(3, name);
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return list.raw();
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}
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static RawArray* MakeServerControlMessage(const SendPort& sp,
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intptr_t code,
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bool enable = false) {
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const Array& list = Array::Handle(Array::New(3));
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ASSERT(!list.IsNull());
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list.SetAt(0, Integer::Handle(Integer::New(code)));
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list.SetAt(1, sp);
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list.SetAt(2, Bool::Get(enable));
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return list.raw();
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}
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static RawArray* MakeServiceExitMessage() {
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const Array& list = Array::Handle(Array::New(1));
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ASSERT(!list.IsNull());
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const intptr_t code = VM_SERVICE_ISOLATE_EXIT_MESSAGE_ID;
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const Integer& code_int = Integer::Handle(Integer::New(code));
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list.SetAt(0, code_int);
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return list.raw();
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}
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const char* ServiceIsolate::kName = "vm-service";
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Isolate* ServiceIsolate::isolate_ = NULL;
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Dart_Port ServiceIsolate::port_ = ILLEGAL_PORT;
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Dart_Port ServiceIsolate::load_port_ = ILLEGAL_PORT;
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Dart_Port ServiceIsolate::origin_ = ILLEGAL_PORT;
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Dart_IsolateCreateCallback ServiceIsolate::create_callback_ = NULL;
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uint8_t* ServiceIsolate::exit_message_ = NULL;
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intptr_t ServiceIsolate::exit_message_length_ = 0;
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Monitor* ServiceIsolate::monitor_ = new Monitor();
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bool ServiceIsolate::initializing_ = true;
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bool ServiceIsolate::shutting_down_ = false;
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char* ServiceIsolate::server_address_ = NULL;
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void ServiceIsolate::RequestServerInfo(const SendPort& sp) {
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const Array& message = Array::Handle(MakeServerControlMessage(
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sp, VM_SERVICE_SERVER_INFO_MESSAGE_ID, false /* ignored */));
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ASSERT(!message.IsNull());
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uint8_t* data = NULL;
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MessageWriter writer(&data, &malloc_allocator, &malloc_deallocator, false);
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writer.WriteMessage(message);
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intptr_t len = writer.BytesWritten();
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PortMap::PostMessage(new Message(port_, data, len, Message::kNormalPriority));
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}
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void ServiceIsolate::ControlWebServer(const SendPort& sp, bool enable) {
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const Array& message = Array::Handle(MakeServerControlMessage(
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sp, VM_SERVICE_WEB_SERVER_CONTROL_MESSAGE_ID, enable));
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ASSERT(!message.IsNull());
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uint8_t* data = NULL;
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MessageWriter writer(&data, &malloc_allocator, &malloc_deallocator, false);
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writer.WriteMessage(message);
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intptr_t len = writer.BytesWritten();
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PortMap::PostMessage(new Message(port_, data, len, Message::kNormalPriority));
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}
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void ServiceIsolate::SetServerAddress(const char* address) {
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if (server_address_ != NULL) {
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free(server_address_);
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server_address_ = NULL;
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}
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if (address == NULL) {
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return;
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}
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server_address_ = strdup(address);
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}
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bool ServiceIsolate::NameEquals(const char* name) {
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ASSERT(name != NULL);
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return strcmp(name, kName) == 0;
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}
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bool ServiceIsolate::Exists() {
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MonitorLocker ml(monitor_);
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return isolate_ != NULL;
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}
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bool ServiceIsolate::IsRunning() {
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MonitorLocker ml(monitor_);
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return (port_ != ILLEGAL_PORT) && (isolate_ != NULL);
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}
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bool ServiceIsolate::IsServiceIsolate(const Isolate* isolate) {
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MonitorLocker ml(monitor_);
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return isolate == isolate_;
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}
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bool ServiceIsolate::IsServiceIsolateDescendant(const Isolate* isolate) {
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MonitorLocker ml(monitor_);
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return isolate->origin_id() == origin_;
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}
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Dart_Port ServiceIsolate::Port() {
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MonitorLocker ml(monitor_);
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return port_;
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}
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Dart_Port ServiceIsolate::WaitForLoadPort() {
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MonitorLocker ml(monitor_);
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while (initializing_ && (load_port_ == ILLEGAL_PORT)) {
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ml.Wait();
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}
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return load_port_;
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}
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Dart_Port ServiceIsolate::LoadPort() {
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MonitorLocker ml(monitor_);
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return load_port_;
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}
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bool ServiceIsolate::SendIsolateStartupMessage() {
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if (!IsRunning()) {
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return false;
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}
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Thread* thread = Thread::Current();
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Isolate* isolate = thread->isolate();
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if (IsServiceIsolateDescendant(isolate)) {
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return false;
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}
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ASSERT(isolate != NULL);
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HANDLESCOPE(thread);
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const String& name = String::Handle(String::New(isolate->name()));
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ASSERT(!name.IsNull());
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const Array& list = Array::Handle(MakeServiceControlMessage(
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Dart_GetMainPortId(), VM_SERVICE_ISOLATE_STARTUP_MESSAGE_ID, name));
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ASSERT(!list.IsNull());
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uint8_t* data = NULL;
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MessageWriter writer(&data, &malloc_allocator, &malloc_deallocator, false);
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writer.WriteMessage(list);
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intptr_t len = writer.BytesWritten();
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: Isolate %s %" Pd64 " registered.\n",
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name.ToCString(), Dart_GetMainPortId());
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}
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return PortMap::PostMessage(
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new Message(port_, data, len, Message::kNormalPriority));
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}
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bool ServiceIsolate::SendIsolateShutdownMessage() {
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if (!IsRunning()) {
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return false;
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}
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Thread* thread = Thread::Current();
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Isolate* isolate = thread->isolate();
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if (IsServiceIsolateDescendant(isolate)) {
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return false;
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}
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ASSERT(isolate != NULL);
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HANDLESCOPE(thread);
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const String& name = String::Handle(String::New(isolate->name()));
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ASSERT(!name.IsNull());
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const Array& list = Array::Handle(MakeServiceControlMessage(
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Dart_GetMainPortId(), VM_SERVICE_ISOLATE_SHUTDOWN_MESSAGE_ID, name));
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ASSERT(!list.IsNull());
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uint8_t* data = NULL;
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MessageWriter writer(&data, &malloc_allocator, &malloc_deallocator, false);
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writer.WriteMessage(list);
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intptr_t len = writer.BytesWritten();
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: Isolate %s %" Pd64 " deregistered.\n",
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name.ToCString(), Dart_GetMainPortId());
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}
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return PortMap::PostMessage(
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new Message(port_, data, len, Message::kNormalPriority));
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}
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void ServiceIsolate::SendServiceExitMessage() {
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if (!IsRunning()) {
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return;
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}
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if ((exit_message_ == NULL) || (exit_message_length_ == 0)) {
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return;
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}
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: sending service exit message.\n");
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}
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PortMap::PostMessage(new Message(port_, exit_message_, exit_message_length_,
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Message::kNormalPriority));
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}
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void ServiceIsolate::SetServicePort(Dart_Port port) {
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MonitorLocker ml(monitor_);
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port_ = port;
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}
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void ServiceIsolate::SetServiceIsolate(Isolate* isolate) {
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MonitorLocker ml(monitor_);
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isolate_ = isolate;
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if (isolate_ != NULL) {
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isolate_->set_is_service_isolate(true);
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origin_ = isolate_->origin_id();
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}
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}
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void ServiceIsolate::SetLoadPort(Dart_Port port) {
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MonitorLocker ml(monitor_);
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load_port_ = port;
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}
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void ServiceIsolate::MaybeMakeServiceIsolate(Isolate* I) {
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Thread* T = Thread::Current();
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ASSERT(I == T->isolate());
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ASSERT(I != NULL);
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ASSERT(I->name() != NULL);
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if (!ServiceIsolate::NameEquals(I->name())) {
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// Not service isolate.
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return;
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}
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if (Exists()) {
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// Service isolate already exists.
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return;
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}
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SetServiceIsolate(I);
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}
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void ServiceIsolate::ConstructExitMessageAndCache(Isolate* I) {
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// Construct and cache exit message here so we can send it without needing an
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// isolate.
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Thread* T = Thread::Current();
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ASSERT(I == T->isolate());
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ASSERT(I != NULL);
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StackZone zone(T);
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HANDLESCOPE(T);
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ASSERT(exit_message_ == NULL);
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ASSERT(exit_message_length_ == 0);
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const Array& list = Array::Handle(Z, MakeServiceExitMessage());
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ASSERT(!list.IsNull());
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MessageWriter writer(&exit_message_, &malloc_allocator, &malloc_deallocator,
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false);
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writer.WriteMessage(list);
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exit_message_length_ = writer.BytesWritten();
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ASSERT(exit_message_ != NULL);
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ASSERT(exit_message_length_ != 0);
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}
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void ServiceIsolate::FinishedExiting() {
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MonitorLocker ml(monitor_);
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shutting_down_ = false;
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ml.NotifyAll();
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}
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void ServiceIsolate::FinishedInitializing() {
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MonitorLocker ml(monitor_);
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initializing_ = false;
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ml.NotifyAll();
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}
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class RunServiceTask : public ThreadPool::Task {
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public:
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virtual void Run() {
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ASSERT(Isolate::Current() == NULL);
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#ifndef PRODUCT
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TimelineDurationScope tds(Timeline::GetVMStream(), "ServiceIsolateStartup");
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#endif // !PRODUCT
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char* error = NULL;
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Isolate* isolate = NULL;
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Dart_IsolateCreateCallback create_callback =
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ServiceIsolate::create_callback();
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ASSERT(create_callback != NULL);
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Dart_IsolateFlags api_flags;
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Isolate::FlagsInitialize(&api_flags);
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isolate = reinterpret_cast<Isolate*>(create_callback(
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ServiceIsolate::kName, NULL, NULL, NULL, &api_flags, NULL, &error));
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if (isolate == NULL) {
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: Isolate creation error: %s\n", error);
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}
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ServiceIsolate::SetServiceIsolate(NULL);
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ServiceIsolate::FinishedInitializing();
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ServiceIsolate::FinishedExiting();
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return;
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}
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bool got_unwind;
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{
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ASSERT(Isolate::Current() == NULL);
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StartIsolateScope start_scope(isolate);
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ServiceIsolate::ConstructExitMessageAndCache(isolate);
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got_unwind = RunMain(isolate);
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}
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if (got_unwind) {
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ShutdownIsolate(reinterpret_cast<uword>(isolate));
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return;
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}
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ServiceIsolate::FinishedInitializing();
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isolate->message_handler()->Run(Dart::thread_pool(), NULL, ShutdownIsolate,
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reinterpret_cast<uword>(isolate));
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}
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protected:
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static void ShutdownIsolate(uword parameter) {
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: ShutdownIsolate\n");
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}
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Isolate* I = reinterpret_cast<Isolate*>(parameter);
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ASSERT(ServiceIsolate::IsServiceIsolate(I));
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ServiceIsolate::SetServiceIsolate(NULL);
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ServiceIsolate::SetServicePort(ILLEGAL_PORT);
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I->WaitForOutstandingSpawns();
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{
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// Print the error if there is one. This may execute dart code to
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// print the exception object, so we need to use a StartIsolateScope.
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ASSERT(Isolate::Current() == NULL);
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StartIsolateScope start_scope(I);
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Thread* T = Thread::Current();
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ASSERT(I == T->isolate());
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StackZone zone(T);
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HandleScope handle_scope(T);
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Error& error = Error::Handle(Z);
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error = T->sticky_error();
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if (!error.IsNull() && !error.IsUnwindError()) {
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OS::PrintErr("vm-service: Error: %s\n", error.ToErrorCString());
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}
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error = I->sticky_error();
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if (!error.IsNull() && !error.IsUnwindError()) {
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OS::PrintErr("vm-service: Error: %s\n", error.ToErrorCString());
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}
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Dart::RunShutdownCallback();
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}
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// Shut the isolate down.
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Dart::ShutdownIsolate(I);
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: Shutdown.\n");
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}
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ServiceIsolate::FinishedExiting();
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}
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bool RunMain(Isolate* I) {
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Thread* T = Thread::Current();
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ASSERT(I == T->isolate());
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StackZone zone(T);
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HANDLESCOPE(T);
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// Invoke main which will return the loadScriptPort.
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const Library& root_library =
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Library::Handle(Z, I->object_store()->root_library());
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if (root_library.IsNull()) {
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: Embedder did not install a script.");
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}
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// Service isolate is not supported by embedder.
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return false;
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}
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ASSERT(!root_library.IsNull());
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const String& entry_name = String::Handle(Z, String::New("main"));
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ASSERT(!entry_name.IsNull());
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const Function& entry = Function::Handle(
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Z, root_library.LookupFunctionAllowPrivate(entry_name));
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if (entry.IsNull()) {
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// Service isolate is not supported by embedder.
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if (FLAG_trace_service) {
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OS::PrintErr("vm-service: Embedder did not provide a main function.");
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}
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return false;
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}
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ASSERT(!entry.IsNull());
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const Object& result = Object::Handle(
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Z, DartEntry::InvokeFunction(entry, Object::empty_array()));
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ASSERT(!result.IsNull());
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if (result.IsError()) {
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// Service isolate did not initialize properly.
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if (FLAG_trace_service) {
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const Error& error = Error::Cast(result);
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OS::PrintErr("vm-service: Calling main resulted in an error: %s",
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error.ToErrorCString());
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}
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if (result.IsUnwindError()) {
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return true;
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}
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return false;
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}
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ASSERT(result.IsReceivePort());
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const ReceivePort& rp = ReceivePort::Cast(result);
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ServiceIsolate::SetLoadPort(rp.Id());
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return false;
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}
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};
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void ServiceIsolate::Run() {
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// Grab the isolate create callback here to avoid race conditions with tests
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// that change this after Dart_Initialize returns.
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create_callback_ = Isolate::CreateCallback();
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if (create_callback_ == NULL) {
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ServiceIsolate::FinishedInitializing();
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return;
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}
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Dart::thread_pool()->Run(new RunServiceTask());
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}
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void ServiceIsolate::KillServiceIsolate() {
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{
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MonitorLocker ml(monitor_);
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shutting_down_ = true;
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}
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Isolate::KillIfExists(isolate_, Isolate::kInternalKillMsg);
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{
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MonitorLocker ml(monitor_);
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while (shutting_down_) {
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ml.Wait();
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}
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}
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}
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void ServiceIsolate::Shutdown() {
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if (IsRunning()) {
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{
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MonitorLocker ml(monitor_);
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shutting_down_ = true;
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}
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SendServiceExitMessage();
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{
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MonitorLocker ml(monitor_);
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while (shutting_down_ && (port_ != ILLEGAL_PORT)) {
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ml.Wait();
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}
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}
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} else {
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if (isolate_ != NULL) {
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// TODO(johnmccutchan,turnidge) When it is possible to properly create
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// the VMService object and set up its shutdown handler in the service
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// isolate's main() function, this case will no longer be possible and
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// can be removed.
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KillServiceIsolate();
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}
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}
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if (server_address_ != NULL) {
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free(server_address_);
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server_address_ = NULL;
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}
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}
|
|
|
|
void ServiceIsolate::BootVmServiceLibrary() {
|
|
Thread* thread = Thread::Current();
|
|
const Library& vmservice_library =
|
|
Library::Handle(Library::LookupLibrary(thread, Symbols::DartVMService()));
|
|
ASSERT(!vmservice_library.IsNull());
|
|
const String& boot_function_name = String::Handle(String::New("boot"));
|
|
const Function& boot_function = Function::Handle(
|
|
vmservice_library.LookupFunctionAllowPrivate(boot_function_name));
|
|
ASSERT(!boot_function.IsNull());
|
|
const Object& result = Object::Handle(
|
|
DartEntry::InvokeFunction(boot_function, Object::empty_array()));
|
|
ASSERT(!result.IsNull());
|
|
if (result.IsUnwindError() || result.IsUnhandledException()) {
|
|
Exceptions::PropagateError(Error::Cast(result));
|
|
}
|
|
Dart_Port port = ILLEGAL_PORT;
|
|
if (result.IsReceivePort()) {
|
|
port = ReceivePort::Cast(result).Id();
|
|
}
|
|
ASSERT(port != ILLEGAL_PORT);
|
|
ServiceIsolate::SetServicePort(port);
|
|
}
|
|
|
|
void ServiceIsolate::VisitObjectPointers(ObjectPointerVisitor* visitor) {}
|
|
|
|
} // namespace dart
|