mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
![Martin Kustermann](/assets/img/avatar_default.png)
This CL moves heap related information (namely instance sizes and allocation stats) out of the [ClassTable] into a [SharedClassTable]. Both classes are always in sync (i.e. they have the same number of entries). This CL also changes GC related code to start using the size information from the new [SharedClassTable]. In a futher step we will move the heap as well as this shared class table out of the [Isolate] and into [IsolateGroup]. Issue https://github.com/dart-lang/sdk/issues/36097 Change-Id: Id54a89c9251ad3bbc13e60d32dc4f7bcc7f1d805 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/116064 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
3275 lines
112 KiB
C++
3275 lines
112 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 <utility>
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#include "vm/isolate.h"
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#include "include/dart_api.h"
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#include "include/dart_native_api.h"
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#include "platform/assert.h"
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#include "platform/atomic.h"
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#include "platform/text_buffer.h"
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#include "vm/class_finalizer.h"
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#include "vm/code_observers.h"
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#include "vm/compiler/jit/compiler.h"
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#include "vm/dart_api_message.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/flags.h"
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#include "vm/heap/heap.h"
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#include "vm/heap/pointer_block.h"
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#include "vm/heap/safepoint.h"
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#include "vm/heap/verifier.h"
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#include "vm/image_snapshot.h"
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#include "vm/interpreter.h"
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#include "vm/isolate_reload.h"
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#include "vm/kernel_isolate.h"
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#include "vm/lockers.h"
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#include "vm/log.h"
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#include "vm/message_handler.h"
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#include "vm/object.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/os_thread.h"
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#include "vm/port.h"
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#include "vm/profiler.h"
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#include "vm/reusable_handles.h"
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#include "vm/reverse_pc_lookup_cache.h"
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#include "vm/service.h"
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#include "vm/service_event.h"
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#include "vm/service_isolate.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/tags.h"
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#include "vm/thread_interrupter.h"
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#include "vm/thread_registry.h"
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#include "vm/timeline.h"
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#include "vm/timeline_analysis.h"
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#include "vm/visitor.h"
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#if !defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/compiler/assembler/assembler.h"
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#include "vm/compiler/stub_code_compiler.h"
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#endif
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namespace dart {
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DECLARE_FLAG(bool, print_metrics);
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DECLARE_FLAG(bool, timing);
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DECLARE_FLAG(bool, trace_service);
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DECLARE_FLAG(bool, warn_on_pause_with_no_debugger);
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// Reload flags.
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DECLARE_FLAG(int, reload_every);
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#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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DECLARE_FLAG(bool, check_reloaded);
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DECLARE_FLAG(bool, reload_every_back_off);
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DECLARE_FLAG(bool, trace_reload);
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#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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static void DeterministicModeHandler(bool value) {
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if (value) {
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FLAG_background_compilation = false; // Timing dependent.
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FLAG_concurrent_mark = false; // Timing dependent.
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FLAG_concurrent_sweep = false; // Timing dependent.
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FLAG_random_seed = 0x44617274; // "Dart"
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}
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}
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DEFINE_FLAG_HANDLER(DeterministicModeHandler,
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deterministic,
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"Enable deterministic mode.");
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// Quick access to the locally defined thread() and isolate() methods.
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#define T (thread())
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#define I (isolate())
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#if defined(DEBUG)
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// Helper class to ensure that a live origin_id is never reused
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// and assigned to an isolate.
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class VerifyOriginId : public IsolateVisitor {
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public:
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explicit VerifyOriginId(Dart_Port id) : id_(id) {}
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void VisitIsolate(Isolate* isolate) { ASSERT(isolate->origin_id() != id_); }
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private:
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Dart_Port id_;
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DISALLOW_COPY_AND_ASSIGN(VerifyOriginId);
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};
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#endif
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static std::unique_ptr<Message> SerializeMessage(Dart_Port dest_port,
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const Instance& obj) {
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if (ApiObjectConverter::CanConvert(obj.raw())) {
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return Message::New(dest_port, obj.raw(), Message::kNormalPriority);
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} else {
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MessageWriter writer(false);
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return writer.WriteMessage(obj, dest_port, Message::kNormalPriority);
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}
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}
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static RawInstance* DeserializeMessage(Thread* thread, Message* message) {
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if (message == NULL) {
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return Instance::null();
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}
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Zone* zone = thread->zone();
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if (message->IsRaw()) {
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return Instance::RawCast(message->raw_obj());
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} else {
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MessageSnapshotReader reader(message, thread);
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const Object& obj = Object::Handle(zone, reader.ReadObject());
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ASSERT(!obj.IsError());
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return Instance::RawCast(obj.raw());
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}
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}
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IsolateGroup::IsolateGroup(std::unique_ptr<IsolateGroupSource> source,
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void* embedder_data)
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: source_(std::move(source)),
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embedder_data_(embedder_data),
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thread_registry_(new ThreadRegistry()),
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safepoint_handler_(new SafepointHandler(this)),
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isolates_monitor_(new Monitor()),
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isolates_() {}
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IsolateGroup::~IsolateGroup() {}
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void IsolateGroup::RegisterIsolate(Isolate* isolate) {
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MonitorLocker ml(isolates_monitor_.get());
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isolates_.Append(isolate);
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isolate_count_++;
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}
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void IsolateGroup::UnregisterIsolate(Isolate* isolate) {
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bool is_last_isolate = false;
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{
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MonitorLocker ml(isolates_monitor_.get());
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isolates_.Remove(isolate);
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isolate_count_--;
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is_last_isolate = isolate_count_ == 0;
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}
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if (is_last_isolate) {
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// If the creation of the isolate group (or the first isolate within the
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// isolate group) failed, we do not invoke the cleanup callback (the
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// embedder is responsible for handling the creation error).
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if (initial_spawn_successful_) {
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auto group_shutdown_callback = Isolate::GroupCleanupCallback();
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if (group_shutdown_callback != nullptr) {
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group_shutdown_callback(embedder_data());
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}
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}
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delete this;
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}
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}
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Thread* IsolateGroup::ScheduleThreadLocked(MonitorLocker* ml,
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Thread* existing_mutator_thread,
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bool is_vm_isolate,
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bool is_mutator,
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bool bypass_safepoint) {
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ASSERT(threads_lock()->IsOwnedByCurrentThread());
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// Schedule the thread into the isolate group by associating
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// a 'Thread' structure with it (this is done while we are holding
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// the thread registry lock).
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Thread* thread = nullptr;
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OSThread* os_thread = OSThread::Current();
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if (os_thread != nullptr) {
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// If a safepoint operation is in progress wait for it
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// to finish before scheduling this thread in.
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while (!bypass_safepoint && safepoint_handler()->SafepointInProgress()) {
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ml->Wait();
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}
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if (is_mutator) {
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if (existing_mutator_thread == nullptr) {
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// Allocate a new [Thread] structure for the mutator thread.
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thread = thread_registry()->GetFreeThreadLocked(is_vm_isolate);
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} else {
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// Reuse the existing cached [Thread] structure for the mutator thread.,
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// see comment in 'base_isolate.h'.
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thread_registry()->AddToActiveListLocked(existing_mutator_thread);
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thread = existing_mutator_thread;
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}
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} else {
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thread = thread_registry()->GetFreeThreadLocked(is_vm_isolate);
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}
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// Now get a free Thread structure.
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ASSERT(thread != nullptr);
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thread->ResetHighWatermark();
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// Set up other values and set the TLS value.
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thread->isolate_ = nullptr;
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thread->isolate_group_ = this;
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thread->set_os_thread(os_thread);
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ASSERT(thread->execution_state() == Thread::kThreadInNative);
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thread->set_execution_state(Thread::kThreadInVM);
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thread->set_safepoint_state(
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Thread::SetBypassSafepoints(bypass_safepoint, 0));
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thread->set_vm_tag(VMTag::kVMTagId);
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ASSERT(thread->no_safepoint_scope_depth() == 0);
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os_thread->set_thread(thread);
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Thread::SetCurrent(thread);
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os_thread->EnableThreadInterrupts();
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}
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return thread;
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}
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void IsolateGroup::UnscheduleThreadLocked(MonitorLocker* ml,
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Thread* thread,
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bool is_mutator,
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bool bypass_safepoint) {
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// Disassociate the 'Thread' structure and unschedule the thread
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// from this isolate group.
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if (!is_mutator) {
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ASSERT(thread->api_top_scope_ == nullptr);
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ASSERT(thread->zone() == nullptr);
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ASSERT(thread->sticky_error() == Error::null());
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}
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if (!bypass_safepoint) {
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// Ensure that the thread reports itself as being at a safepoint.
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thread->EnterSafepoint();
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}
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OSThread* os_thread = thread->os_thread();
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ASSERT(os_thread != nullptr);
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os_thread->DisableThreadInterrupts();
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os_thread->set_thread(nullptr);
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OSThread::SetCurrent(os_thread);
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// Even if we unschedule the mutator thread, e.g. via calling
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// `Dart_ExitIsolate()` inside a native, we might still have one or more Dart
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// stacks active, which e.g. GC marker threads want to visit. So we don't
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// clear out the isolate pointer if we are on the mutator thread.
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//
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// The [thread] structure for the mutator thread is kept alive in the thread
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// registry even if the mutator thread is temporarily unscheduled.
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//
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// All other threads are not allowed to unschedule themselves and schedule
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// again later on.
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if (!is_mutator) {
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thread->isolate_ = nullptr;
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}
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thread->heap_ = nullptr;
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thread->set_os_thread(nullptr);
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thread->set_execution_state(Thread::kThreadInNative);
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thread->set_safepoint_state(Thread::SetAtSafepoint(true, 0));
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thread->clear_pending_functions();
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ASSERT(thread->no_safepoint_scope_depth() == 0);
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if (is_mutator) {
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// The mutator thread structure stays alive and attached to the isolate as
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// long as the isolate lives. So we simply remove the thread from the list
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// of scheduled threads.
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thread_registry()->RemoveFromActiveListLocked(thread);
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} else {
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// Return thread structure.
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thread_registry()->ReturnThreadLocked(thread);
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}
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}
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Thread* IsolateGroup::ScheduleThread(bool bypass_safepoint) {
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// We are about to associate the thread with an isolate group and it would
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// not be possible to correctly track no_safepoint_scope_depth for the
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// thread in the constructor/destructor of MonitorLocker,
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// so we create a MonitorLocker object which does not do any
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// no_safepoint_scope_depth increments/decrements.
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MonitorLocker ml(threads_lock(), false);
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const bool is_vm_isolate = false;
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// Schedule the thread into the isolate by associating
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// a 'Thread' structure with it (this is done while we are holding
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// the thread registry lock).
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return ScheduleThreadLocked(&ml, /*existing_mutator_thread=*/nullptr,
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is_vm_isolate, /*is_mutator=*/false,
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bypass_safepoint);
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}
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void IsolateGroup::UnscheduleThread(Thread* thread,
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bool is_mutator,
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bool bypass_safepoint) {
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// Disassociate the 'Thread' structure and unschedule the thread
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// from this isolate group.
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//
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// We are disassociating the thread from an isolate and it would
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// not be possible to correctly track no_safepoint_scope_depth for the
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// thread in the constructor/destructor of MonitorLocker,
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// so we create a MonitorLocker object which does not do any
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// no_safepoint_scope_depth increments/decrements.
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MonitorLocker ml(threads_lock(), false);
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UnscheduleThreadLocked(&ml, thread, is_mutator, bypass_safepoint);
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}
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bool IsolateVisitor::IsVMInternalIsolate(Isolate* isolate) const {
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return Isolate::IsVMInternalIsolate(isolate);
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}
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NoOOBMessageScope::NoOOBMessageScope(Thread* thread)
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: ThreadStackResource(thread) {
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thread->DeferOOBMessageInterrupts();
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}
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NoOOBMessageScope::~NoOOBMessageScope() {
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thread()->RestoreOOBMessageInterrupts();
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}
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NoReloadScope::NoReloadScope(Isolate* isolate, Thread* thread)
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: ThreadStackResource(thread), isolate_(isolate) {
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#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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ASSERT(isolate_ != NULL);
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AtomicOperations::FetchAndIncrement(&(isolate_->no_reload_scope_depth_));
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ASSERT(AtomicOperations::LoadRelaxed(&(isolate_->no_reload_scope_depth_)) >=
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0);
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#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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}
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NoReloadScope::~NoReloadScope() {
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#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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AtomicOperations::FetchAndDecrement(&(isolate_->no_reload_scope_depth_));
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ASSERT(AtomicOperations::LoadRelaxed(&(isolate_->no_reload_scope_depth_)) >=
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0);
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#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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}
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void Isolate::RegisterClass(const Class& cls) {
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#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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if (IsReloading()) {
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reload_context()->RegisterClass(cls);
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return;
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}
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#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
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class_table()->Register(cls);
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}
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#if defined(DEBUG)
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void Isolate::ValidateClassTable() {
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class_table()->Validate();
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}
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#endif // DEBUG
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void Isolate::RehashConstants() {
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Thread* thread = Thread::Current();
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StackZone stack_zone(thread);
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Zone* zone = stack_zone.GetZone();
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thread->heap()->ResetCanonicalHashTable();
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Class& cls = Class::Handle(zone);
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intptr_t top = class_table()->NumCids();
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for (intptr_t cid = kInstanceCid; cid < top; cid++) {
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if (!class_table()->IsValidIndex(cid) ||
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!class_table()->HasValidClassAt(cid)) {
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continue;
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}
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if ((cid == kTypeArgumentsCid) || RawObject::IsStringClassId(cid)) {
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// TypeArguments and Symbols have special tables for canonical objects
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// that aren't based on address.
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continue;
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}
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cls = class_table()->At(cid);
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cls.RehashConstants(zone);
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}
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}
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#if defined(DEBUG)
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void Isolate::ValidateConstants() {
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if (FLAG_precompiled_mode) {
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// TODO(27003)
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return;
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}
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if (HasAttemptedReload()) {
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return;
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}
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// Verify that all canonical instances are correctly setup in the
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// corresponding canonical tables.
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BackgroundCompiler::Stop(this);
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heap()->CollectAllGarbage();
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Thread* thread = Thread::Current();
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HeapIterationScope iteration(thread);
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VerifyCanonicalVisitor check_canonical(thread);
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iteration.IterateObjects(&check_canonical);
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}
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#endif // DEBUG
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void Isolate::SendInternalLibMessage(LibMsgId msg_id, uint64_t capability) {
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const Array& msg = Array::Handle(Array::New(3));
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Object& element = Object::Handle();
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element = Smi::New(Message::kIsolateLibOOBMsg);
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msg.SetAt(0, element);
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element = Smi::New(msg_id);
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msg.SetAt(1, element);
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element = Capability::New(capability);
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msg.SetAt(2, element);
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MessageWriter writer(false);
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PortMap::PostMessage(
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writer.WriteMessage(msg, main_port(), Message::kOOBPriority));
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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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MessageStatus HandleMessage(std::unique_ptr<Message> message);
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#ifndef PRODUCT
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void NotifyPauseOnStart();
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void NotifyPauseOnExit();
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#endif // !PRODUCT
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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* isolate() const { return isolate_; }
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private:
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// A result of false indicates that the isolate should terminate the
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// processing of further events.
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RawError* HandleLibMessage(const Array& message);
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MessageStatus ProcessUnhandledException(const Error& result);
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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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IsolateMessageHandler::~IsolateMessageHandler() {}
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const char* IsolateMessageHandler::name() const {
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return isolate_->name();
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}
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// Isolate library OOB messages are fixed sized arrays which have the
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// following format:
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// [ OOB dispatch, Isolate library dispatch, <message specific data> ]
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RawError* IsolateMessageHandler::HandleLibMessage(const Array& message) {
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if (message.Length() < 2) return Error::null();
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Zone* zone = T->zone();
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const Object& type = Object::Handle(zone, message.At(1));
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if (!type.IsSmi()) return Error::null();
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const intptr_t msg_type = Smi::Cast(type).Value();
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switch (msg_type) {
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case Isolate::kPauseMsg: {
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// [ OOB, kPauseMsg, pause capability, resume capability ]
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if (message.Length() != 4) return Error::null();
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Object& obj = Object::Handle(zone, message.At(2));
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if (!I->VerifyPauseCapability(obj)) return Error::null();
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obj = message.At(3);
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if (!obj.IsCapability()) return Error::null();
|
|
if (I->AddResumeCapability(Capability::Cast(obj))) {
|
|
increment_paused();
|
|
}
|
|
break;
|
|
}
|
|
case Isolate::kResumeMsg: {
|
|
// [ OOB, kResumeMsg, pause capability, resume capability ]
|
|
if (message.Length() != 4) return Error::null();
|
|
Object& obj = Object::Handle(zone, message.At(2));
|
|
if (!I->VerifyPauseCapability(obj)) return Error::null();
|
|
obj = message.At(3);
|
|
if (!obj.IsCapability()) return Error::null();
|
|
if (I->RemoveResumeCapability(Capability::Cast(obj))) {
|
|
decrement_paused();
|
|
}
|
|
break;
|
|
}
|
|
case Isolate::kPingMsg: {
|
|
// [ OOB, kPingMsg, responsePort, priority, response ]
|
|
if (message.Length() != 5) return Error::null();
|
|
const Object& obj2 = Object::Handle(zone, message.At(2));
|
|
if (!obj2.IsSendPort()) return Error::null();
|
|
const SendPort& send_port = SendPort::Cast(obj2);
|
|
const Object& obj3 = Object::Handle(zone, message.At(3));
|
|
if (!obj3.IsSmi()) return Error::null();
|
|
const intptr_t priority = Smi::Cast(obj3).Value();
|
|
const Object& obj4 = Object::Handle(zone, message.At(4));
|
|
if (!obj4.IsInstance() && !obj4.IsNull()) return Error::null();
|
|
const Instance& response =
|
|
obj4.IsNull() ? Instance::null_instance() : Instance::Cast(obj4);
|
|
if (priority == Isolate::kImmediateAction) {
|
|
PortMap::PostMessage(SerializeMessage(send_port.Id(), response));
|
|
} else {
|
|
ASSERT((priority == Isolate::kBeforeNextEventAction) ||
|
|
(priority == Isolate::kAsEventAction));
|
|
// Update the message so that it will be handled immediately when it
|
|
// is picked up from the message queue the next time.
|
|
message.SetAt(
|
|
0, Smi::Handle(zone, Smi::New(Message::kDelayedIsolateLibOOBMsg)));
|
|
message.SetAt(3,
|
|
Smi::Handle(zone, Smi::New(Isolate::kImmediateAction)));
|
|
this->PostMessage(
|
|
SerializeMessage(Message::kIllegalPort, message),
|
|
priority == Isolate::kBeforeNextEventAction /* at_head */);
|
|
}
|
|
break;
|
|
}
|
|
case Isolate::kKillMsg:
|
|
case Isolate::kInternalKillMsg: {
|
|
// [ OOB, kKillMsg, terminate capability, priority ]
|
|
if (message.Length() != 4) return Error::null();
|
|
Object& obj = Object::Handle(zone, message.At(3));
|
|
if (!obj.IsSmi()) return Error::null();
|
|
const intptr_t priority = Smi::Cast(obj).Value();
|
|
if (priority == Isolate::kImmediateAction) {
|
|
obj = message.At(2);
|
|
if (I->VerifyTerminateCapability(obj)) {
|
|
// We will kill the current isolate by returning an UnwindError.
|
|
if (msg_type == Isolate::kKillMsg) {
|
|
const String& msg = String::Handle(
|
|
String::New("isolate terminated by Isolate.kill"));
|
|
const UnwindError& error =
|
|
UnwindError::Handle(UnwindError::New(msg));
|
|
error.set_is_user_initiated(true);
|
|
return error.raw();
|
|
} else if (msg_type == Isolate::kInternalKillMsg) {
|
|
const String& msg =
|
|
String::Handle(String::New("isolate terminated by vm"));
|
|
return UnwindError::New(msg);
|
|
} else {
|
|
UNREACHABLE();
|
|
}
|
|
} else {
|
|
return Error::null();
|
|
}
|
|
} else {
|
|
ASSERT((priority == Isolate::kBeforeNextEventAction) ||
|
|
(priority == Isolate::kAsEventAction));
|
|
// Update the message so that it will be handled immediately when it
|
|
// is picked up from the message queue the next time.
|
|
message.SetAt(
|
|
0, Smi::Handle(zone, Smi::New(Message::kDelayedIsolateLibOOBMsg)));
|
|
message.SetAt(3,
|
|
Smi::Handle(zone, Smi::New(Isolate::kImmediateAction)));
|
|
this->PostMessage(
|
|
SerializeMessage(Message::kIllegalPort, message),
|
|
priority == Isolate::kBeforeNextEventAction /* at_head */);
|
|
}
|
|
break;
|
|
}
|
|
case Isolate::kInterruptMsg: {
|
|
// [ OOB, kInterruptMsg, pause capability ]
|
|
if (message.Length() != 3) return Error::null();
|
|
Object& obj = Object::Handle(zone, message.At(2));
|
|
if (!I->VerifyPauseCapability(obj)) return Error::null();
|
|
|
|
#if !defined(PRODUCT)
|
|
// If we are already paused, don't pause again.
|
|
if (I->debugger()->PauseEvent() == NULL) {
|
|
return I->debugger()->PauseInterrupted();
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
case Isolate::kLowMemoryMsg: {
|
|
I->heap()->NotifyLowMemory();
|
|
break;
|
|
}
|
|
case Isolate::kDrainServiceExtensionsMsg: {
|
|
#ifndef PRODUCT
|
|
Object& obj = Object::Handle(zone, message.At(2));
|
|
if (!obj.IsSmi()) return Error::null();
|
|
const intptr_t priority = Smi::Cast(obj).Value();
|
|
if (priority == Isolate::kImmediateAction) {
|
|
return I->InvokePendingServiceExtensionCalls();
|
|
} else {
|
|
ASSERT((priority == Isolate::kBeforeNextEventAction) ||
|
|
(priority == Isolate::kAsEventAction));
|
|
// Update the message so that it will be handled immediately when it
|
|
// is picked up from the message queue the next time.
|
|
message.SetAt(
|
|
0, Smi::Handle(zone, Smi::New(Message::kDelayedIsolateLibOOBMsg)));
|
|
message.SetAt(2,
|
|
Smi::Handle(zone, Smi::New(Isolate::kImmediateAction)));
|
|
this->PostMessage(
|
|
SerializeMessage(Message::kIllegalPort, message),
|
|
priority == Isolate::kBeforeNextEventAction /* at_head */);
|
|
}
|
|
#else
|
|
UNREACHABLE();
|
|
#endif // !PRODUCT
|
|
break;
|
|
}
|
|
|
|
case Isolate::kAddExitMsg:
|
|
case Isolate::kDelExitMsg:
|
|
case Isolate::kAddErrorMsg:
|
|
case Isolate::kDelErrorMsg: {
|
|
// [ OOB, msg, listener port ]
|
|
if (message.Length() < 3) return Error::null();
|
|
const Object& obj = Object::Handle(zone, message.At(2));
|
|
if (!obj.IsSendPort()) return Error::null();
|
|
const SendPort& listener = SendPort::Cast(obj);
|
|
switch (msg_type) {
|
|
case Isolate::kAddExitMsg: {
|
|
if (message.Length() != 4) return Error::null();
|
|
// [ OOB, msg, listener port, response object ]
|
|
const Object& response = Object::Handle(zone, message.At(3));
|
|
if (!response.IsInstance() && !response.IsNull()) {
|
|
return Error::null();
|
|
}
|
|
I->AddExitListener(listener, response.IsNull()
|
|
? Instance::null_instance()
|
|
: Instance::Cast(response));
|
|
break;
|
|
}
|
|
case Isolate::kDelExitMsg:
|
|
if (message.Length() != 3) return Error::null();
|
|
I->RemoveExitListener(listener);
|
|
break;
|
|
case Isolate::kAddErrorMsg:
|
|
if (message.Length() != 3) return Error::null();
|
|
I->AddErrorListener(listener);
|
|
break;
|
|
case Isolate::kDelErrorMsg:
|
|
if (message.Length() != 3) return Error::null();
|
|
I->RemoveErrorListener(listener);
|
|
break;
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
break;
|
|
}
|
|
case Isolate::kErrorFatalMsg: {
|
|
// [ OOB, kErrorFatalMsg, terminate capability, val ]
|
|
if (message.Length() != 4) return Error::null();
|
|
// Check that the terminate capability has been passed correctly.
|
|
Object& obj = Object::Handle(zone, message.At(2));
|
|
if (!I->VerifyTerminateCapability(obj)) return Error::null();
|
|
// Get the value to be set.
|
|
obj = message.At(3);
|
|
if (!obj.IsBool()) return Error::null();
|
|
I->SetErrorsFatal(Bool::Cast(obj).value());
|
|
break;
|
|
}
|
|
#if defined(DEBUG)
|
|
// Malformed OOB messages are silently ignored in release builds.
|
|
default:
|
|
FATAL1("Unknown OOB message type: %" Pd "\n", msg_type);
|
|
break;
|
|
#endif // defined(DEBUG)
|
|
}
|
|
return Error::null();
|
|
}
|
|
|
|
void IsolateMessageHandler::MessageNotify(Message::Priority priority) {
|
|
if (priority >= Message::kOOBPriority) {
|
|
// Handle out of band messages even if the mutator thread is busy.
|
|
I->ScheduleInterrupts(Thread::kMessageInterrupt);
|
|
}
|
|
Dart_MessageNotifyCallback callback = I->message_notify_callback();
|
|
if (callback != nullptr) {
|
|
// Allow the embedder to handle message notification.
|
|
(*callback)(Api::CastIsolate(I));
|
|
}
|
|
}
|
|
|
|
bool Isolate::HasPendingMessages() {
|
|
return message_handler_->HasMessages() || message_handler_->HasOOBMessages();
|
|
}
|
|
|
|
MessageHandler::MessageStatus IsolateMessageHandler::HandleMessage(
|
|
std::unique_ptr<Message> message) {
|
|
ASSERT(IsCurrentIsolate());
|
|
Thread* thread = Thread::Current();
|
|
StackZone stack_zone(thread);
|
|
Zone* zone = stack_zone.GetZone();
|
|
HandleScope handle_scope(thread);
|
|
#if defined(SUPPORT_TIMELINE)
|
|
TimelineDurationScope tds(
|
|
thread, Timeline::GetIsolateStream(),
|
|
message->IsOOB() ? "HandleOOBMessage" : "HandleMessage");
|
|
tds.SetNumArguments(1);
|
|
tds.CopyArgument(0, "isolateName", I->name());
|
|
#endif
|
|
|
|
// If the message is in band we lookup the handler to dispatch to. If the
|
|
// receive port was closed, we drop the message without deserializing it.
|
|
// Illegal port is a special case for artificially enqueued isolate library
|
|
// messages which are handled in C++ code below.
|
|
Object& msg_handler = Object::Handle(zone);
|
|
if (!message->IsOOB() && (message->dest_port() != Message::kIllegalPort)) {
|
|
msg_handler = DartLibraryCalls::LookupHandler(message->dest_port());
|
|
if (msg_handler.IsError()) {
|
|
return ProcessUnhandledException(Error::Cast(msg_handler));
|
|
}
|
|
if (msg_handler.IsNull()) {
|
|
// If the port has been closed then the message will be dropped at this
|
|
// point. Make sure to post to the delivery failure port in that case.
|
|
if (message->RedirectToDeliveryFailurePort()) {
|
|
PortMap::PostMessage(std::move(message));
|
|
}
|
|
return kOK;
|
|
}
|
|
}
|
|
|
|
// Parse the message.
|
|
Object& msg_obj = Object::Handle(zone);
|
|
if (message->IsRaw()) {
|
|
msg_obj = message->raw_obj();
|
|
// We should only be sending RawObjects that can be converted to CObjects.
|
|
ASSERT(ApiObjectConverter::CanConvert(msg_obj.raw()));
|
|
} else {
|
|
MessageSnapshotReader reader(message.get(), thread);
|
|
msg_obj = reader.ReadObject();
|
|
}
|
|
if (msg_obj.IsError()) {
|
|
// An error occurred while reading the message.
|
|
return ProcessUnhandledException(Error::Cast(msg_obj));
|
|
}
|
|
if (!msg_obj.IsNull() && !msg_obj.IsInstance()) {
|
|
// TODO(turnidge): We need to decide what an isolate does with
|
|
// malformed messages. If they (eventually) come from a remote
|
|
// machine, then it might make sense to drop the message entirely.
|
|
// In the case that the message originated locally, which is
|
|
// always true for now, then this should never occur.
|
|
UNREACHABLE();
|
|
}
|
|
Instance& msg = Instance::Handle(zone);
|
|
msg ^= msg_obj.raw(); // Can't use Instance::Cast because may be null.
|
|
|
|
MessageStatus status = kOK;
|
|
if (message->IsOOB()) {
|
|
// OOB messages are expected to be fixed length arrays where the first
|
|
// element is a Smi describing the OOB destination. Messages that do not
|
|
// confirm to this layout are silently ignored.
|
|
if (msg.IsArray()) {
|
|
const Array& oob_msg = Array::Cast(msg);
|
|
if (oob_msg.Length() > 0) {
|
|
const Object& oob_tag = Object::Handle(zone, oob_msg.At(0));
|
|
if (oob_tag.IsSmi()) {
|
|
switch (Smi::Cast(oob_tag).Value()) {
|
|
case Message::kServiceOOBMsg: {
|
|
if (FLAG_support_service) {
|
|
const Error& error =
|
|
Error::Handle(Service::HandleIsolateMessage(I, oob_msg));
|
|
if (!error.IsNull()) {
|
|
status = ProcessUnhandledException(error);
|
|
}
|
|
} else {
|
|
UNREACHABLE();
|
|
}
|
|
break;
|
|
}
|
|
case Message::kIsolateLibOOBMsg: {
|
|
const Error& error = Error::Handle(HandleLibMessage(oob_msg));
|
|
if (!error.IsNull()) {
|
|
status = ProcessUnhandledException(error);
|
|
}
|
|
break;
|
|
}
|
|
#if defined(DEBUG)
|
|
// Malformed OOB messages are silently ignored in release builds.
|
|
default: {
|
|
UNREACHABLE();
|
|
break;
|
|
}
|
|
#endif // defined(DEBUG)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else if (message->dest_port() == Message::kIllegalPort) {
|
|
// Check whether this is a delayed OOB message which needed handling as
|
|
// part of the regular message dispatch. All other messages are dropped on
|
|
// the floor.
|
|
if (msg.IsArray()) {
|
|
const Array& msg_arr = Array::Cast(msg);
|
|
if (msg_arr.Length() > 0) {
|
|
const Object& oob_tag = Object::Handle(zone, msg_arr.At(0));
|
|
if (oob_tag.IsSmi() &&
|
|
(Smi::Cast(oob_tag).Value() == Message::kDelayedIsolateLibOOBMsg)) {
|
|
const Error& error = Error::Handle(HandleLibMessage(msg_arr));
|
|
if (!error.IsNull()) {
|
|
status = ProcessUnhandledException(error);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
#ifndef PRODUCT
|
|
if (!Isolate::IsVMInternalIsolate(I)) {
|
|
// Mark all the user isolates as white-listed for the simplified timeline
|
|
// page of Observatory. The internal isolates will be filtered out from
|
|
// the Timeline due to absence of this argument. We still send them in
|
|
// order to maintain the original behavior of the full timeline and allow
|
|
// the developer to download complete dump files.
|
|
tds.SetNumArguments(2);
|
|
tds.CopyArgument(1, "mode", "basic");
|
|
}
|
|
#endif
|
|
const Object& result =
|
|
Object::Handle(zone, DartLibraryCalls::HandleMessage(msg_handler, msg));
|
|
if (result.IsError()) {
|
|
status = ProcessUnhandledException(Error::Cast(result));
|
|
} else {
|
|
ASSERT(result.IsNull());
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
void IsolateMessageHandler::NotifyPauseOnStart() {
|
|
if (!FLAG_support_service || Isolate::IsVMInternalIsolate(I)) {
|
|
return;
|
|
}
|
|
if (Service::debug_stream.enabled() || FLAG_warn_on_pause_with_no_debugger) {
|
|
StartIsolateScope start_isolate(I);
|
|
StackZone zone(T);
|
|
HandleScope handle_scope(T);
|
|
ServiceEvent pause_event(I, ServiceEvent::kPauseStart);
|
|
Service::HandleEvent(&pause_event);
|
|
} else if (FLAG_trace_service) {
|
|
OS::PrintErr("vm-service: Dropping event of type PauseStart (%s)\n",
|
|
I->name());
|
|
}
|
|
}
|
|
|
|
void IsolateMessageHandler::NotifyPauseOnExit() {
|
|
if (!FLAG_support_service || Isolate::IsVMInternalIsolate(I)) {
|
|
return;
|
|
}
|
|
if (Service::debug_stream.enabled() || FLAG_warn_on_pause_with_no_debugger) {
|
|
StartIsolateScope start_isolate(I);
|
|
StackZone zone(T);
|
|
HandleScope handle_scope(T);
|
|
ServiceEvent pause_event(I, ServiceEvent::kPauseExit);
|
|
Service::HandleEvent(&pause_event);
|
|
} else if (FLAG_trace_service) {
|
|
OS::PrintErr("vm-service: Dropping event of type PauseExit (%s)\n",
|
|
I->name());
|
|
}
|
|
}
|
|
#endif // !PRODUCT
|
|
|
|
#if defined(DEBUG)
|
|
void IsolateMessageHandler::CheckAccess() {
|
|
ASSERT(IsCurrentIsolate());
|
|
}
|
|
#endif
|
|
|
|
bool IsolateMessageHandler::IsCurrentIsolate() const {
|
|
return (I == Isolate::Current());
|
|
}
|
|
|
|
static MessageHandler::MessageStatus StoreError(Thread* thread,
|
|
const Error& error) {
|
|
thread->set_sticky_error(error);
|
|
if (error.IsUnwindError()) {
|
|
const UnwindError& unwind = UnwindError::Cast(error);
|
|
if (!unwind.is_user_initiated()) {
|
|
return MessageHandler::kShutdown;
|
|
}
|
|
}
|
|
return MessageHandler::kError;
|
|
}
|
|
|
|
MessageHandler::MessageStatus IsolateMessageHandler::ProcessUnhandledException(
|
|
const Error& result) {
|
|
if (FLAG_trace_isolates) {
|
|
OS::PrintErr(
|
|
"[!] Unhandled exception in %s:\n"
|
|
" exception: %s\n",
|
|
T->isolate()->name(), result.ToErrorCString());
|
|
}
|
|
|
|
NoReloadScope no_reload_scope(T->isolate(), T);
|
|
// Generate the error and stacktrace strings for the error message.
|
|
String& exc_str = String::Handle(T->zone());
|
|
String& stacktrace_str = String::Handle(T->zone());
|
|
if (result.IsUnhandledException()) {
|
|
Zone* zone = T->zone();
|
|
const UnhandledException& uhe = UnhandledException::Cast(result);
|
|
const Instance& exception = Instance::Handle(zone, uhe.exception());
|
|
Object& tmp = Object::Handle(zone);
|
|
tmp = DartLibraryCalls::ToString(exception);
|
|
if (!tmp.IsString()) {
|
|
tmp = String::New(exception.ToCString());
|
|
}
|
|
exc_str ^= tmp.raw();
|
|
|
|
const Instance& stacktrace = Instance::Handle(zone, uhe.stacktrace());
|
|
tmp = DartLibraryCalls::ToString(stacktrace);
|
|
if (!tmp.IsString()) {
|
|
tmp = String::New(stacktrace.ToCString());
|
|
}
|
|
stacktrace_str ^= tmp.raw();
|
|
} else {
|
|
exc_str = String::New(result.ToErrorCString());
|
|
}
|
|
if (result.IsUnwindError()) {
|
|
// When unwinding we don't notify error listeners and we ignore
|
|
// whether errors are fatal for the current isolate.
|
|
return StoreError(T, result);
|
|
} else {
|
|
bool has_listener = I->NotifyErrorListeners(exc_str, stacktrace_str);
|
|
if (I->ErrorsFatal()) {
|
|
if (has_listener) {
|
|
T->ClearStickyError();
|
|
} else {
|
|
T->set_sticky_error(result);
|
|
}
|
|
#if !defined(PRODUCT)
|
|
// Notify the debugger about specific unhandled exceptions which are
|
|
// withheld when being thrown. Do this after setting the sticky error
|
|
// so the isolate has an error set when paused with the unhandled
|
|
// exception.
|
|
if (result.IsUnhandledException()) {
|
|
const UnhandledException& error = UnhandledException::Cast(result);
|
|
RawInstance* exception = error.exception();
|
|
if ((exception == I->object_store()->out_of_memory()) ||
|
|
(exception == I->object_store()->stack_overflow())) {
|
|
// We didn't notify the debugger when the stack was full. Do it now.
|
|
I->debugger()->PauseException(Instance::Handle(exception));
|
|
}
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
return kError;
|
|
}
|
|
}
|
|
return kOK;
|
|
}
|
|
|
|
void Isolate::FlagsInitialize(Dart_IsolateFlags* api_flags) {
|
|
const bool false_by_default = false;
|
|
const bool true_by_default = true;
|
|
USE(true_by_default);
|
|
USE(false_by_default);
|
|
|
|
api_flags->version = DART_FLAGS_CURRENT_VERSION;
|
|
#define INIT_FROM_FLAG(when, name, bitname, isolate_flag, flag) \
|
|
api_flags->isolate_flag = flag;
|
|
ISOLATE_FLAG_LIST(INIT_FROM_FLAG)
|
|
#undef INIT_FROM_FLAG
|
|
api_flags->entry_points = NULL;
|
|
api_flags->load_vmservice_library = false;
|
|
api_flags->copy_parent_code = false;
|
|
}
|
|
|
|
void Isolate::FlagsCopyTo(Dart_IsolateFlags* api_flags) const {
|
|
api_flags->version = DART_FLAGS_CURRENT_VERSION;
|
|
#define INIT_FROM_FIELD(when, name, bitname, isolate_flag, flag) \
|
|
api_flags->isolate_flag = name();
|
|
ISOLATE_FLAG_LIST(INIT_FROM_FIELD)
|
|
#undef INIT_FROM_FIELD
|
|
api_flags->entry_points = NULL;
|
|
api_flags->load_vmservice_library = should_load_vmservice();
|
|
api_flags->copy_parent_code = false;
|
|
}
|
|
|
|
void Isolate::FlagsCopyFrom(const Dart_IsolateFlags& api_flags) {
|
|
#if defined(DART_PRECOMPILER)
|
|
#define FLAG_FOR_PRECOMPILER(action) action
|
|
#else
|
|
#define FLAG_FOR_PRECOMPILER(action)
|
|
#endif
|
|
|
|
#if !defined(PRODUCT)
|
|
#define FLAG_FOR_NONPRODUCT(action) action
|
|
#else
|
|
#define FLAG_FOR_NONPRODUCT(action)
|
|
#endif
|
|
|
|
#define FLAG_FOR_PRODUCT(action) action
|
|
|
|
#define SET_FROM_FLAG(when, name, bitname, isolate_flag, flag) \
|
|
FLAG_FOR_##when(isolate_flags_ = bitname##Bit::update( \
|
|
api_flags.isolate_flag, isolate_flags_));
|
|
|
|
ISOLATE_FLAG_LIST(SET_FROM_FLAG)
|
|
|
|
#undef FLAG_FOR_NONPRODUCT
|
|
#undef FLAG_FOR_PRECOMPILER
|
|
#undef FLAG_FOR_PRODUCT
|
|
#undef SET_FROM_FLAG
|
|
|
|
set_should_load_vmservice(api_flags.load_vmservice_library);
|
|
|
|
// Copy entry points list.
|
|
ASSERT(embedder_entry_points_ == NULL);
|
|
if (api_flags.entry_points != NULL) {
|
|
intptr_t count = 0;
|
|
while (api_flags.entry_points[count].function_name != NULL)
|
|
count++;
|
|
embedder_entry_points_ = new Dart_QualifiedFunctionName[count + 1];
|
|
for (intptr_t i = 0; i < count; i++) {
|
|
embedder_entry_points_[i].library_uri =
|
|
strdup(api_flags.entry_points[i].library_uri);
|
|
embedder_entry_points_[i].class_name =
|
|
strdup(api_flags.entry_points[i].class_name);
|
|
embedder_entry_points_[i].function_name =
|
|
strdup(api_flags.entry_points[i].function_name);
|
|
}
|
|
memset(&embedder_entry_points_[count], 0,
|
|
sizeof(Dart_QualifiedFunctionName));
|
|
}
|
|
|
|
// Leave others at defaults.
|
|
}
|
|
|
|
#if defined(DEBUG)
|
|
// static
|
|
void BaseIsolate::AssertCurrent(BaseIsolate* isolate) {
|
|
ASSERT(isolate == Isolate::Current());
|
|
}
|
|
|
|
void BaseIsolate::AssertCurrentThreadIsMutator() const {
|
|
ASSERT(Isolate::Current() == this);
|
|
ASSERT(Thread::Current()->IsMutatorThread());
|
|
}
|
|
#endif // defined(DEBUG)
|
|
|
|
#if defined(DEBUG)
|
|
#define REUSABLE_HANDLE_SCOPE_INIT(object) \
|
|
reusable_##object##_handle_scope_active_(false),
|
|
#else
|
|
#define REUSABLE_HANDLE_SCOPE_INIT(object)
|
|
#endif // defined(DEBUG)
|
|
|
|
#define REUSABLE_HANDLE_INITIALIZERS(object) object##_handle_(nullptr),
|
|
|
|
// TODO(srdjan): Some Isolate monitors can be shared. Replace their usage with
|
|
// that shared monitor.
|
|
Isolate::Isolate(IsolateGroup* isolate_group,
|
|
const Dart_IsolateFlags& api_flags)
|
|
: BaseIsolate(),
|
|
current_tag_(UserTag::null()),
|
|
default_tag_(UserTag::null()),
|
|
ic_miss_code_(Code::null()),
|
|
shared_class_table_(new SharedClassTable()),
|
|
class_table_(shared_class_table_.get()),
|
|
store_buffer_(new StoreBuffer()),
|
|
#if !defined(TARGET_ARCH_DBC) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
native_callback_trampolines_(),
|
|
#endif
|
|
#if !defined(PRODUCT)
|
|
last_resume_timestamp_(OS::GetCurrentTimeMillis()),
|
|
vm_tag_counters_(),
|
|
pending_service_extension_calls_(GrowableObjectArray::null()),
|
|
registered_service_extension_handlers_(GrowableObjectArray::null()),
|
|
#define ISOLATE_METRIC_CONSTRUCTORS(type, variable, name, unit) \
|
|
metric_##variable##_(),
|
|
ISOLATE_METRIC_LIST(ISOLATE_METRIC_CONSTRUCTORS)
|
|
#undef ISOLATE_METRIC_CONSTRUCTORS
|
|
reload_every_n_stack_overflow_checks_(FLAG_reload_every),
|
|
last_reload_timestamp_(OS::GetCurrentTimeMillis()),
|
|
#endif // !defined(PRODUCT)
|
|
start_time_micros_(OS::GetCurrentMonotonicMicros()),
|
|
random_(),
|
|
mutex_(NOT_IN_PRODUCT("Isolate::mutex_")),
|
|
symbols_mutex_(NOT_IN_PRODUCT("Isolate::symbols_mutex_")),
|
|
type_canonicalization_mutex_(
|
|
NOT_IN_PRODUCT("Isolate::type_canonicalization_mutex_")),
|
|
constant_canonicalization_mutex_(
|
|
NOT_IN_PRODUCT("Isolate::constant_canonicalization_mutex_")),
|
|
megamorphic_mutex_(NOT_IN_PRODUCT("Isolate::megamorphic_mutex_")),
|
|
kernel_data_lib_cache_mutex_(
|
|
NOT_IN_PRODUCT("Isolate::kernel_data_lib_cache_mutex_")),
|
|
kernel_data_class_cache_mutex_(
|
|
NOT_IN_PRODUCT("Isolate::kernel_data_class_cache_mutex_")),
|
|
kernel_constants_mutex_(
|
|
NOT_IN_PRODUCT("Isolate::kernel_constants_mutex_")),
|
|
pending_deopts_(new MallocGrowableArray<PendingLazyDeopt>()),
|
|
tag_table_(GrowableObjectArray::null()),
|
|
deoptimized_code_array_(GrowableObjectArray::null()),
|
|
sticky_error_(Error::null()),
|
|
reloaded_kernel_blobs_(GrowableObjectArray::null()),
|
|
field_list_mutex_(NOT_IN_PRODUCT("Isolate::field_list_mutex_")),
|
|
boxed_field_list_(GrowableObjectArray::null()),
|
|
spawn_count_monitor_(),
|
|
handler_info_cache_(),
|
|
catch_entry_moves_cache_() {
|
|
FlagsCopyFrom(api_flags);
|
|
SetErrorsFatal(true);
|
|
set_compilation_allowed(true);
|
|
// TODO(asiva): A Thread is not available here, need to figure out
|
|
// how the vm_tag (kEmbedderTagId) can be set, these tags need to
|
|
// move to the OSThread structure.
|
|
set_user_tag(UserTags::kDefaultUserTag);
|
|
|
|
if (obfuscate()) {
|
|
OS::PrintErr(
|
|
"Warning: This VM has been configured to obfuscate symbol information "
|
|
"which violates the Dart standard.\n"
|
|
" See dartbug.com/30524 for more information.\n");
|
|
}
|
|
|
|
if (FLAG_enable_interpreter) {
|
|
NOT_IN_PRECOMPILED(background_compiler_ = new BackgroundCompiler(
|
|
this, /* optimizing = */ false));
|
|
}
|
|
NOT_IN_PRECOMPILED(optimizing_background_compiler_ =
|
|
new BackgroundCompiler(this, /* optimizing = */ true));
|
|
|
|
isolate_group->RegisterIsolate(this);
|
|
isolate_group_ = isolate_group;
|
|
}
|
|
|
|
#undef REUSABLE_HANDLE_SCOPE_INIT
|
|
#undef REUSABLE_HANDLE_INITIALIZERS
|
|
|
|
Isolate::~Isolate() {
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
// TODO(32796): Re-enable assertion.
|
|
// RELEASE_ASSERT(reload_context_ == NULL);
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
delete reverse_pc_lookup_cache_;
|
|
reverse_pc_lookup_cache_ = nullptr;
|
|
|
|
if (FLAG_enable_interpreter) {
|
|
delete background_compiler_;
|
|
background_compiler_ = nullptr;
|
|
}
|
|
|
|
delete optimizing_background_compiler_;
|
|
optimizing_background_compiler_ = nullptr;
|
|
|
|
#if !defined(PRODUCT)
|
|
delete debugger_;
|
|
debugger_ = nullptr;
|
|
if (FLAG_support_service) {
|
|
delete object_id_ring_;
|
|
}
|
|
object_id_ring_ = nullptr;
|
|
delete pause_loop_monitor_;
|
|
pause_loop_monitor_ = nullptr;
|
|
#endif // !defined(PRODUCT)
|
|
|
|
free(name_);
|
|
delete store_buffer_;
|
|
delete heap_;
|
|
ASSERT(marking_stack_ == nullptr);
|
|
delete object_store_;
|
|
delete api_state_;
|
|
#if defined(USING_SIMULATOR)
|
|
delete simulator_;
|
|
#endif
|
|
delete pending_deopts_;
|
|
pending_deopts_ = nullptr;
|
|
delete message_handler_;
|
|
message_handler_ =
|
|
nullptr; // Fail fast if we send messages to a dead isolate.
|
|
ASSERT(deopt_context_ ==
|
|
nullptr); // No deopt in progress when isolate deleted.
|
|
ASSERT(spawn_count_ == 0);
|
|
|
|
// We have cached the mutator thread, delete it.
|
|
ASSERT(scheduled_mutator_thread_ == nullptr);
|
|
mutator_thread_->isolate_ = nullptr;
|
|
delete mutator_thread_;
|
|
mutator_thread_ = nullptr;
|
|
|
|
if (obfuscation_map_ != nullptr) {
|
|
for (intptr_t i = 0; obfuscation_map_[i] != nullptr; i++) {
|
|
delete[] obfuscation_map_[i];
|
|
}
|
|
delete[] obfuscation_map_;
|
|
}
|
|
|
|
if (embedder_entry_points_ != nullptr) {
|
|
for (intptr_t i = 0; embedder_entry_points_[i].function_name != nullptr;
|
|
i++) {
|
|
free(const_cast<char*>(embedder_entry_points_[i].library_uri));
|
|
free(const_cast<char*>(embedder_entry_points_[i].class_name));
|
|
free(const_cast<char*>(embedder_entry_points_[i].function_name));
|
|
}
|
|
delete[] embedder_entry_points_;
|
|
}
|
|
|
|
// Run isolate group specific cleanup function if the last isolate in an
|
|
// isolate group died.
|
|
isolate_group_->UnregisterIsolate(this);
|
|
isolate_group_ = nullptr;
|
|
}
|
|
|
|
void Isolate::InitVM() {
|
|
create_group_callback_ = nullptr;
|
|
initialize_callback_ = nullptr;
|
|
shutdown_callback_ = nullptr;
|
|
cleanup_callback_ = nullptr;
|
|
cleanup_group_callback_ = nullptr;
|
|
if (isolates_list_monitor_ == nullptr) {
|
|
isolates_list_monitor_ = new Monitor();
|
|
}
|
|
ASSERT(isolates_list_monitor_ != nullptr);
|
|
EnableIsolateCreation();
|
|
}
|
|
|
|
Isolate* Isolate::InitIsolate(const char* name_prefix,
|
|
IsolateGroup* isolate_group,
|
|
const Dart_IsolateFlags& api_flags,
|
|
bool is_vm_isolate) {
|
|
Isolate* result = new Isolate(isolate_group, api_flags);
|
|
ASSERT(result != nullptr);
|
|
|
|
#if !defined(PRODUCT)
|
|
// Initialize metrics.
|
|
#define ISOLATE_METRIC_INIT(type, variable, name, unit) \
|
|
result->metric_##variable##_.InitInstance(result, name, NULL, Metric::unit);
|
|
ISOLATE_METRIC_LIST(ISOLATE_METRIC_INIT);
|
|
#undef ISOLATE_METRIC_INIT
|
|
#endif // !defined(PRODUCT)
|
|
|
|
bool is_service_or_kernel_isolate = false;
|
|
if (ServiceIsolate::NameEquals(name_prefix)) {
|
|
ASSERT(!ServiceIsolate::Exists());
|
|
is_service_or_kernel_isolate = true;
|
|
}
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (KernelIsolate::NameEquals(name_prefix)) {
|
|
ASSERT(!KernelIsolate::Exists());
|
|
KernelIsolate::SetKernelIsolate(result);
|
|
is_service_or_kernel_isolate = true;
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
Heap::Init(result,
|
|
is_vm_isolate
|
|
? 0 // New gen size 0; VM isolate should only allocate in old.
|
|
: FLAG_new_gen_semi_max_size * MBInWords,
|
|
(is_service_or_kernel_isolate ? kDefaultMaxOldGenHeapSize
|
|
: FLAG_old_gen_heap_size) *
|
|
MBInWords);
|
|
|
|
// TODO(5411455): For now just set the recently created isolate as
|
|
// the current isolate.
|
|
if (!Thread::EnterIsolate(result)) {
|
|
// We failed to enter the isolate, it is possible the VM is shutting down,
|
|
// return back a NULL so that CreateIsolate reports back an error.
|
|
if (KernelIsolate::IsKernelIsolate(result)) {
|
|
KernelIsolate::SetKernelIsolate(nullptr);
|
|
}
|
|
if (ServiceIsolate::IsServiceIsolate(result)) {
|
|
ServiceIsolate::SetServiceIsolate(nullptr);
|
|
}
|
|
delete result;
|
|
return nullptr;
|
|
}
|
|
|
|
// Setup the isolate message handler.
|
|
MessageHandler* handler = new IsolateMessageHandler(result);
|
|
ASSERT(handler != nullptr);
|
|
result->set_message_handler(handler);
|
|
|
|
// Setup the Dart API state.
|
|
ApiState* state = new ApiState();
|
|
ASSERT(state != nullptr);
|
|
result->set_api_state(state);
|
|
|
|
result->set_main_port(PortMap::CreatePort(result->message_handler()));
|
|
#if defined(DEBUG)
|
|
// Verify that we are never reusing a live origin id.
|
|
VerifyOriginId id_verifier(result->main_port());
|
|
Isolate::VisitIsolates(&id_verifier);
|
|
#endif
|
|
result->set_origin_id(result->main_port());
|
|
result->set_pause_capability(result->random()->NextUInt64());
|
|
result->set_terminate_capability(result->random()->NextUInt64());
|
|
|
|
result->BuildName(name_prefix);
|
|
#if !defined(PRODUCT)
|
|
result->debugger_ = new Debugger(result);
|
|
#endif
|
|
if (FLAG_trace_isolates) {
|
|
if (name_prefix == nullptr || strcmp(name_prefix, "vm-isolate") != 0) {
|
|
OS::PrintErr(
|
|
"[+] Starting isolate:\n"
|
|
"\tisolate: %s\n",
|
|
result->name());
|
|
}
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
if (FLAG_support_service) {
|
|
ObjectIdRing::Init(result);
|
|
}
|
|
#endif // !PRODUCT
|
|
|
|
// Add to isolate list. Shutdown and delete the isolate on failure.
|
|
if (!AddIsolateToList(result)) {
|
|
result->LowLevelShutdown();
|
|
Thread::ExitIsolate();
|
|
if (KernelIsolate::IsKernelIsolate(result)) {
|
|
KernelIsolate::SetKernelIsolate(nullptr);
|
|
}
|
|
if (ServiceIsolate::IsServiceIsolate(result)) {
|
|
ServiceIsolate::SetServiceIsolate(nullptr);
|
|
}
|
|
|
|
delete result;
|
|
return nullptr;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void Isolate::RetainKernelBlob(const ExternalTypedData& kernel_blob) {
|
|
if (reloaded_kernel_blobs_ == Object::null()) {
|
|
reloaded_kernel_blobs_ = GrowableObjectArray::New();
|
|
}
|
|
auto& kernel_blobs = GrowableObjectArray::Handle(reloaded_kernel_blobs_);
|
|
kernel_blobs.Add(kernel_blob);
|
|
}
|
|
|
|
Thread* Isolate::mutator_thread() const {
|
|
ASSERT(thread_registry() != nullptr);
|
|
return mutator_thread_;
|
|
}
|
|
|
|
RawObject* Isolate::CallTagHandler(Dart_LibraryTag tag,
|
|
const Object& arg1,
|
|
const Object& arg2) {
|
|
Thread* thread = Thread::Current();
|
|
Api::Scope api_scope(thread);
|
|
Dart_Handle api_arg1 = Api::NewHandle(thread, arg1.raw());
|
|
Dart_Handle api_arg2 = Api::NewHandle(thread, arg2.raw());
|
|
Dart_Handle api_result;
|
|
{
|
|
TransitionVMToNative transition(thread);
|
|
ASSERT(HasTagHandler());
|
|
api_result = group()->library_tag_handler()(tag, api_arg1, api_arg2);
|
|
}
|
|
return Api::UnwrapHandle(api_result);
|
|
}
|
|
|
|
void Isolate::SetupImagePage(const uint8_t* image_buffer, bool is_executable) {
|
|
Image image(image_buffer);
|
|
heap_->SetupImagePage(image.object_start(), image.object_size(),
|
|
is_executable);
|
|
}
|
|
|
|
void Isolate::ScheduleInterrupts(uword interrupt_bits) {
|
|
// We take the threads lock here to ensure that the mutator thread does not
|
|
// exit the isolate while we are trying to schedule interrupts on it.
|
|
MonitorLocker ml(threads_lock());
|
|
Thread* mthread = mutator_thread();
|
|
if (mthread != nullptr) {
|
|
mthread->ScheduleInterrupts(interrupt_bits);
|
|
}
|
|
}
|
|
|
|
void Isolate::set_name(const char* name) {
|
|
free(name_);
|
|
name_ = strdup(name);
|
|
}
|
|
|
|
int64_t Isolate::UptimeMicros() const {
|
|
return OS::GetCurrentMonotonicMicros() - start_time_micros_;
|
|
}
|
|
|
|
bool Isolate::IsPaused() const {
|
|
#if defined(PRODUCT)
|
|
return false;
|
|
#else
|
|
return (debugger_ != nullptr) && (debugger_->PauseEvent() != nullptr);
|
|
#endif // !defined(PRODUCT)
|
|
}
|
|
|
|
RawError* Isolate::PausePostRequest() {
|
|
#if !defined(PRODUCT)
|
|
if (debugger_ == nullptr) {
|
|
return Error::null();
|
|
}
|
|
ASSERT(!IsPaused());
|
|
const Error& error = Error::Handle(debugger_->PausePostRequest());
|
|
if (!error.IsNull()) {
|
|
if (Thread::Current()->top_exit_frame_info() == 0) {
|
|
return error.raw();
|
|
} else {
|
|
Exceptions::PropagateError(error);
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
#endif
|
|
return Error::null();
|
|
}
|
|
|
|
void Isolate::BuildName(const char* name_prefix) {
|
|
ASSERT(name_ == nullptr);
|
|
if (name_prefix == nullptr) {
|
|
name_ = OS::SCreate(nullptr, "isolate-%" Pd64 "", main_port());
|
|
} else {
|
|
name_ = strdup(name_prefix);
|
|
}
|
|
}
|
|
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
bool Isolate::CanReload() const {
|
|
return !Isolate::IsVMInternalIsolate(this) && is_runnable() &&
|
|
!IsReloading() &&
|
|
(AtomicOperations::LoadRelaxed(&no_reload_scope_depth_) == 0) &&
|
|
IsolateCreationEnabled() &&
|
|
OSThread::Current()->HasStackHeadroom(64 * KB);
|
|
}
|
|
|
|
bool Isolate::ReloadSources(JSONStream* js,
|
|
bool force_reload,
|
|
const char* root_script_url,
|
|
const char* packages_url,
|
|
bool dont_delete_reload_context) {
|
|
ASSERT(!IsReloading());
|
|
SetHasAttemptedReload(true);
|
|
reload_context_ = new IsolateReloadContext(this, js);
|
|
reload_context_->Reload(force_reload, root_script_url, packages_url,
|
|
/* kernel_buffer= */ nullptr,
|
|
/* kernel_buffer_size= */ 0);
|
|
bool success = !reload_context_->reload_aborted();
|
|
if (!dont_delete_reload_context) {
|
|
DeleteReloadContext();
|
|
}
|
|
return success;
|
|
}
|
|
|
|
bool Isolate::ReloadKernel(JSONStream* js,
|
|
bool force_reload,
|
|
const uint8_t* kernel_buffer,
|
|
intptr_t kernel_buffer_size,
|
|
bool dont_delete_reload_context) {
|
|
ASSERT(!IsReloading());
|
|
SetHasAttemptedReload(true);
|
|
reload_context_ = new IsolateReloadContext(this, js);
|
|
reload_context_->Reload(force_reload,
|
|
/* root_script_url= */ nullptr,
|
|
/* packages_url= */ nullptr, kernel_buffer,
|
|
kernel_buffer_size);
|
|
bool success = !reload_context_->reload_aborted();
|
|
if (!dont_delete_reload_context) {
|
|
DeleteReloadContext();
|
|
}
|
|
return success;
|
|
}
|
|
|
|
void Isolate::DeleteReloadContext() {
|
|
// Another thread may be in the middle of GetClassForHeapWalkAt.
|
|
Thread* thread = Thread::Current();
|
|
SafepointOperationScope safepoint_scope(thread);
|
|
|
|
delete reload_context_;
|
|
reload_context_ = nullptr;
|
|
}
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
const char* Isolate::MakeRunnable() {
|
|
ASSERT(Isolate::Current() == nullptr);
|
|
|
|
MutexLocker ml(&mutex_);
|
|
// Check if we are in a valid state to make the isolate runnable.
|
|
if (is_runnable() == true) {
|
|
return "Isolate is already runnable";
|
|
}
|
|
// Set the isolate as runnable and if we are being spawned schedule
|
|
// isolate on thread pool for execution.
|
|
ASSERT(object_store()->root_library() != Library::null());
|
|
set_is_runnable(true);
|
|
#ifndef PRODUCT
|
|
if (!Isolate::IsVMInternalIsolate(this)) {
|
|
debugger()->OnIsolateRunnable();
|
|
if (FLAG_pause_isolates_on_unhandled_exceptions) {
|
|
debugger()->SetExceptionPauseInfo(kPauseOnUnhandledExceptions);
|
|
}
|
|
}
|
|
#endif // !PRODUCT
|
|
IsolateSpawnState* state = spawn_state();
|
|
if (state != nullptr) {
|
|
ASSERT(this == state->isolate());
|
|
Run();
|
|
}
|
|
#if defined(SUPPORT_TIMELINE)
|
|
TimelineStream* stream = Timeline::GetIsolateStream();
|
|
ASSERT(stream != nullptr);
|
|
TimelineEvent* event = stream->StartEvent();
|
|
if (event != nullptr) {
|
|
event->Instant("Runnable");
|
|
event->Complete();
|
|
}
|
|
#endif
|
|
#ifndef PRODUCT
|
|
if (FLAG_support_service && !Isolate::IsVMInternalIsolate(this) &&
|
|
Service::isolate_stream.enabled()) {
|
|
ServiceEvent runnableEvent(this, ServiceEvent::kIsolateRunnable);
|
|
Service::HandleEvent(&runnableEvent);
|
|
}
|
|
GetRunnableLatencyMetric()->set_value(UptimeMicros());
|
|
if (FLAG_print_benchmarking_metrics) {
|
|
{
|
|
StartIsolateScope scope(this);
|
|
heap()->CollectAllGarbage();
|
|
}
|
|
int64_t heap_size = (heap()->UsedInWords(Heap::kNew) * kWordSize) +
|
|
(heap()->UsedInWords(Heap::kOld) * kWordSize);
|
|
GetRunnableHeapSizeMetric()->set_value(heap_size);
|
|
}
|
|
#endif // !PRODUCT
|
|
return nullptr;
|
|
}
|
|
|
|
bool Isolate::VerifyPauseCapability(const Object& capability) const {
|
|
return !capability.IsNull() && capability.IsCapability() &&
|
|
(pause_capability() == Capability::Cast(capability).Id());
|
|
}
|
|
|
|
bool Isolate::VerifyTerminateCapability(const Object& capability) const {
|
|
return !capability.IsNull() && capability.IsCapability() &&
|
|
(terminate_capability() == Capability::Cast(capability).Id());
|
|
}
|
|
|
|
bool Isolate::AddResumeCapability(const Capability& capability) {
|
|
// Ensure a limit for the number of resume capabilities remembered.
|
|
static const intptr_t kMaxResumeCapabilities =
|
|
compiler::target::kSmiMax / (6 * kWordSize);
|
|
|
|
const GrowableObjectArray& caps = GrowableObjectArray::Handle(
|
|
current_zone(), object_store()->resume_capabilities());
|
|
Capability& current = Capability::Handle(current_zone());
|
|
intptr_t insertion_index = -1;
|
|
for (intptr_t i = 0; i < caps.Length(); i++) {
|
|
current ^= caps.At(i);
|
|
if (current.IsNull()) {
|
|
if (insertion_index < 0) {
|
|
insertion_index = i;
|
|
}
|
|
} else if (current.Id() == capability.Id()) {
|
|
return false;
|
|
}
|
|
}
|
|
if (insertion_index < 0) {
|
|
if (caps.Length() >= kMaxResumeCapabilities) {
|
|
// Cannot grow the array of resume capabilities beyond its max. Additional
|
|
// pause requests are ignored. In practice will never happen as we will
|
|
// run out of memory beforehand.
|
|
return false;
|
|
}
|
|
caps.Add(capability);
|
|
} else {
|
|
caps.SetAt(insertion_index, capability);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool Isolate::RemoveResumeCapability(const Capability& capability) {
|
|
const GrowableObjectArray& caps = GrowableObjectArray::Handle(
|
|
current_zone(), object_store()->resume_capabilities());
|
|
Capability& current = Capability::Handle(current_zone());
|
|
for (intptr_t i = 0; i < caps.Length(); i++) {
|
|
current ^= caps.At(i);
|
|
if (!current.IsNull() && (current.Id() == capability.Id())) {
|
|
// Remove the matching capability from the list.
|
|
current = Capability::null();
|
|
caps.SetAt(i, current);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// TODO(iposva): Remove duplicated code and start using some hash based
|
|
// structure instead of these linear lookups.
|
|
void Isolate::AddExitListener(const SendPort& listener,
|
|
const Instance& response) {
|
|
// Ensure a limit for the number of listeners remembered.
|
|
static const intptr_t kMaxListeners =
|
|
compiler::target::kSmiMax / (12 * kWordSize);
|
|
|
|
const GrowableObjectArray& listeners = GrowableObjectArray::Handle(
|
|
current_zone(), object_store()->exit_listeners());
|
|
SendPort& current = SendPort::Handle(current_zone());
|
|
intptr_t insertion_index = -1;
|
|
for (intptr_t i = 0; i < listeners.Length(); i += 2) {
|
|
current ^= listeners.At(i);
|
|
if (current.IsNull()) {
|
|
if (insertion_index < 0) {
|
|
insertion_index = i;
|
|
}
|
|
} else if (current.Id() == listener.Id()) {
|
|
listeners.SetAt(i + 1, response);
|
|
return;
|
|
}
|
|
}
|
|
if (insertion_index < 0) {
|
|
if (listeners.Length() >= kMaxListeners) {
|
|
// Cannot grow the array of listeners beyond its max. Additional
|
|
// listeners are ignored. In practice will never happen as we will
|
|
// run out of memory beforehand.
|
|
return;
|
|
}
|
|
listeners.Add(listener);
|
|
listeners.Add(response);
|
|
} else {
|
|
listeners.SetAt(insertion_index, listener);
|
|
listeners.SetAt(insertion_index + 1, response);
|
|
}
|
|
}
|
|
|
|
void Isolate::RemoveExitListener(const SendPort& listener) {
|
|
const GrowableObjectArray& listeners = GrowableObjectArray::Handle(
|
|
current_zone(), object_store()->exit_listeners());
|
|
SendPort& current = SendPort::Handle(current_zone());
|
|
for (intptr_t i = 0; i < listeners.Length(); i += 2) {
|
|
current ^= listeners.At(i);
|
|
if (!current.IsNull() && (current.Id() == listener.Id())) {
|
|
// Remove the matching listener from the list.
|
|
current = SendPort::null();
|
|
listeners.SetAt(i, current);
|
|
listeners.SetAt(i + 1, Object::null_instance());
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Isolate::NotifyExitListeners() {
|
|
const GrowableObjectArray& listeners = GrowableObjectArray::Handle(
|
|
current_zone(), this->object_store()->exit_listeners());
|
|
if (listeners.IsNull()) return;
|
|
|
|
SendPort& listener = SendPort::Handle(current_zone());
|
|
Instance& response = Instance::Handle(current_zone());
|
|
for (intptr_t i = 0; i < listeners.Length(); i += 2) {
|
|
listener ^= listeners.At(i);
|
|
if (!listener.IsNull()) {
|
|
Dart_Port port_id = listener.Id();
|
|
response ^= listeners.At(i + 1);
|
|
PortMap::PostMessage(SerializeMessage(port_id, response));
|
|
}
|
|
}
|
|
}
|
|
|
|
void Isolate::AddErrorListener(const SendPort& listener) {
|
|
// Ensure a limit for the number of listeners remembered.
|
|
static const intptr_t kMaxListeners =
|
|
compiler::target::kSmiMax / (6 * kWordSize);
|
|
|
|
const GrowableObjectArray& listeners = GrowableObjectArray::Handle(
|
|
current_zone(), object_store()->error_listeners());
|
|
SendPort& current = SendPort::Handle(current_zone());
|
|
intptr_t insertion_index = -1;
|
|
for (intptr_t i = 0; i < listeners.Length(); i++) {
|
|
current ^= listeners.At(i);
|
|
if (current.IsNull()) {
|
|
if (insertion_index < 0) {
|
|
insertion_index = i;
|
|
}
|
|
} else if (current.Id() == listener.Id()) {
|
|
return;
|
|
}
|
|
}
|
|
if (insertion_index < 0) {
|
|
if (listeners.Length() >= kMaxListeners) {
|
|
// Cannot grow the array of listeners beyond its max. Additional
|
|
// listeners are ignored. In practice will never happen as we will
|
|
// run out of memory beforehand.
|
|
return;
|
|
}
|
|
listeners.Add(listener);
|
|
} else {
|
|
listeners.SetAt(insertion_index, listener);
|
|
}
|
|
}
|
|
|
|
void Isolate::RemoveErrorListener(const SendPort& listener) {
|
|
const GrowableObjectArray& listeners = GrowableObjectArray::Handle(
|
|
current_zone(), object_store()->error_listeners());
|
|
SendPort& current = SendPort::Handle(current_zone());
|
|
for (intptr_t i = 0; i < listeners.Length(); i++) {
|
|
current ^= listeners.At(i);
|
|
if (!current.IsNull() && (current.Id() == listener.Id())) {
|
|
// Remove the matching listener from the list.
|
|
current = SendPort::null();
|
|
listeners.SetAt(i, current);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Isolate::NotifyErrorListeners(const String& msg,
|
|
const String& stacktrace) {
|
|
const GrowableObjectArray& listeners = GrowableObjectArray::Handle(
|
|
current_zone(), this->object_store()->error_listeners());
|
|
if (listeners.IsNull()) return false;
|
|
|
|
const Array& arr = Array::Handle(current_zone(), Array::New(2));
|
|
arr.SetAt(0, msg);
|
|
arr.SetAt(1, stacktrace);
|
|
SendPort& listener = SendPort::Handle(current_zone());
|
|
for (intptr_t i = 0; i < listeners.Length(); i++) {
|
|
listener ^= listeners.At(i);
|
|
if (!listener.IsNull()) {
|
|
Dart_Port port_id = listener.Id();
|
|
PortMap::PostMessage(SerializeMessage(port_id, arr));
|
|
}
|
|
}
|
|
return listeners.Length() > 0;
|
|
}
|
|
|
|
static MessageHandler::MessageStatus RunIsolate(uword parameter) {
|
|
Isolate* isolate = reinterpret_cast<Isolate*>(parameter);
|
|
IsolateSpawnState* state = nullptr;
|
|
{
|
|
// TODO(turnidge): Is this locking required here at all anymore?
|
|
MutexLocker ml(isolate->mutex());
|
|
state = isolate->spawn_state();
|
|
}
|
|
{
|
|
StartIsolateScope start_scope(isolate);
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread->isolate() == isolate);
|
|
StackZone zone(thread);
|
|
HandleScope handle_scope(thread);
|
|
|
|
// If particular values were requested for this newly spawned isolate, then
|
|
// they are set here before the isolate starts executing user code.
|
|
isolate->SetErrorsFatal(state->errors_are_fatal());
|
|
if (state->on_exit_port() != ILLEGAL_PORT) {
|
|
const SendPort& listener =
|
|
SendPort::Handle(SendPort::New(state->on_exit_port()));
|
|
isolate->AddExitListener(listener, Instance::null_instance());
|
|
}
|
|
if (state->on_error_port() != ILLEGAL_PORT) {
|
|
const SendPort& listener =
|
|
SendPort::Handle(SendPort::New(state->on_error_port()));
|
|
isolate->AddErrorListener(listener);
|
|
}
|
|
|
|
// Switch back to spawning isolate.
|
|
|
|
if (!ClassFinalizer::ProcessPendingClasses()) {
|
|
// Error is in sticky error already.
|
|
#if defined(DEBUG)
|
|
const Error& error = Error::Handle(thread->sticky_error());
|
|
ASSERT(!error.IsUnwindError());
|
|
#endif
|
|
return MessageHandler::kError;
|
|
}
|
|
|
|
Object& result = Object::Handle();
|
|
result = state->ResolveFunction();
|
|
bool is_spawn_uri = state->is_spawn_uri();
|
|
if (result.IsError()) {
|
|
return StoreError(thread, Error::Cast(result));
|
|
}
|
|
ASSERT(result.IsFunction());
|
|
Function& func = Function::Handle(thread->zone());
|
|
func ^= result.raw();
|
|
|
|
func = func.ImplicitClosureFunction();
|
|
|
|
const Array& capabilities = Array::Handle(Array::New(2));
|
|
Capability& capability = Capability::Handle();
|
|
capability = Capability::New(isolate->pause_capability());
|
|
capabilities.SetAt(0, capability);
|
|
// Check whether this isolate should be started in paused state.
|
|
if (state->paused()) {
|
|
bool added = isolate->AddResumeCapability(capability);
|
|
ASSERT(added); // There should be no pending resume capabilities.
|
|
isolate->message_handler()->increment_paused();
|
|
}
|
|
capability = Capability::New(isolate->terminate_capability());
|
|
capabilities.SetAt(1, capability);
|
|
|
|
// Instead of directly invoking the entry point we call '_startIsolate' with
|
|
// the entry point as argument.
|
|
// 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(7));
|
|
args.SetAt(0, SendPort::Handle(SendPort::New(state->parent_port())));
|
|
args.SetAt(1, Instance::Handle(func.ImplicitStaticClosure()));
|
|
args.SetAt(2, Instance::Handle(state->BuildArgs(thread)));
|
|
args.SetAt(3, Instance::Handle(state->BuildMessage(thread)));
|
|
args.SetAt(4, is_spawn_uri ? Bool::True() : Bool::False());
|
|
args.SetAt(5, ReceivePort::Handle(ReceivePort::New(
|
|
isolate->main_port(), true /* control port */)));
|
|
args.SetAt(6, capabilities);
|
|
|
|
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()) {
|
|
return StoreError(thread, Error::Cast(result));
|
|
}
|
|
}
|
|
return MessageHandler::kOK;
|
|
}
|
|
|
|
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);
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread->isolate() == isolate);
|
|
|
|
// We must wait for any outstanding spawn calls to complete before
|
|
// running the shutdown callback.
|
|
isolate->WaitForOutstandingSpawns();
|
|
|
|
StackZone zone(thread);
|
|
HandleScope handle_scope(thread);
|
|
#if defined(DEBUG)
|
|
isolate->ValidateConstants();
|
|
#endif // defined(DEBUG)
|
|
Dart::RunShutdownCallback();
|
|
}
|
|
// Shut the isolate down.
|
|
Dart::ShutdownIsolate(isolate);
|
|
}
|
|
|
|
void Isolate::SetStickyError(RawError* sticky_error) {
|
|
ASSERT(
|
|
((sticky_error_ == Error::null()) || (sticky_error == Error::null())) &&
|
|
(sticky_error != sticky_error_));
|
|
sticky_error_ = sticky_error;
|
|
}
|
|
|
|
void Isolate::Run() {
|
|
message_handler()->Run(Dart::thread_pool(), RunIsolate, ShutdownIsolate,
|
|
reinterpret_cast<uword>(this));
|
|
}
|
|
|
|
void Isolate::NotifyIdle(int64_t deadline) {
|
|
heap()->NotifyIdle(deadline);
|
|
}
|
|
|
|
void Isolate::AddClosureFunction(const Function& function) const {
|
|
ASSERT(!Compiler::IsBackgroundCompilation());
|
|
GrowableObjectArray& closures =
|
|
GrowableObjectArray::Handle(object_store()->closure_functions());
|
|
ASSERT(!closures.IsNull());
|
|
ASSERT(function.IsNonImplicitClosureFunction());
|
|
closures.Add(function, Heap::kOld);
|
|
}
|
|
|
|
// If the linear lookup turns out to be too expensive, the list
|
|
// of closures could be maintained in a hash map, with the key
|
|
// being the token position of the closure. There are almost no
|
|
// collisions with this simple hash value. However, iterating over
|
|
// all closure functions becomes more difficult, especially when
|
|
// the list/map changes while iterating over it.
|
|
RawFunction* Isolate::LookupClosureFunction(const Function& parent,
|
|
TokenPosition token_pos) const {
|
|
const GrowableObjectArray& closures =
|
|
GrowableObjectArray::Handle(object_store()->closure_functions());
|
|
ASSERT(!closures.IsNull());
|
|
Function& closure = Function::Handle();
|
|
intptr_t num_closures = closures.Length();
|
|
for (intptr_t i = 0; i < num_closures; i++) {
|
|
closure ^= closures.At(i);
|
|
if ((closure.token_pos() == token_pos) &&
|
|
(closure.parent_function() == parent.raw())) {
|
|
return closure.raw();
|
|
}
|
|
}
|
|
return Function::null();
|
|
}
|
|
|
|
intptr_t Isolate::FindClosureIndex(const Function& needle) const {
|
|
const GrowableObjectArray& closures_array =
|
|
GrowableObjectArray::Handle(object_store()->closure_functions());
|
|
intptr_t num_closures = closures_array.Length();
|
|
for (intptr_t i = 0; i < num_closures; i++) {
|
|
if (closures_array.At(i) == needle.raw()) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
RawFunction* Isolate::ClosureFunctionFromIndex(intptr_t idx) const {
|
|
const GrowableObjectArray& closures_array =
|
|
GrowableObjectArray::Handle(object_store()->closure_functions());
|
|
if ((idx < 0) || (idx >= closures_array.Length())) {
|
|
return Function::null();
|
|
}
|
|
return Function::RawCast(closures_array.At(idx));
|
|
}
|
|
|
|
class FinalizeWeakPersistentHandlesVisitor : public HandleVisitor {
|
|
public:
|
|
FinalizeWeakPersistentHandlesVisitor() : HandleVisitor(Thread::Current()) {}
|
|
|
|
void VisitHandle(uword addr) {
|
|
FinalizablePersistentHandle* handle =
|
|
reinterpret_cast<FinalizablePersistentHandle*>(addr);
|
|
handle->UpdateUnreachable(thread()->isolate());
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(FinalizeWeakPersistentHandlesVisitor);
|
|
};
|
|
|
|
// static
|
|
void Isolate::NotifyLowMemory() {
|
|
Isolate::KillAllIsolates(Isolate::kLowMemoryMsg);
|
|
}
|
|
|
|
void Isolate::LowLevelShutdown() {
|
|
// Ensure we have a zone and handle scope so that we can call VM functions,
|
|
// but we no longer allocate new heap objects.
|
|
Thread* thread = Thread::Current();
|
|
StackZone stack_zone(thread);
|
|
HandleScope handle_scope(thread);
|
|
NoSafepointScope no_safepoint_scope;
|
|
|
|
// Notify exit listeners that this isolate is shutting down.
|
|
if (object_store() != nullptr) {
|
|
const Error& error = Error::Handle(thread->sticky_error());
|
|
if (error.IsNull() || !error.IsUnwindError() ||
|
|
UnwindError::Cast(error).is_user_initiated()) {
|
|
NotifyExitListeners();
|
|
}
|
|
}
|
|
|
|
// Close all the ports owned by this isolate.
|
|
PortMap::ClosePorts(message_handler());
|
|
|
|
// Fail fast if anybody tries to post any more messages to this isolate.
|
|
delete message_handler();
|
|
set_message_handler(nullptr);
|
|
#if defined(SUPPORT_TIMELINE)
|
|
// Before analyzing the isolate's timeline blocks- reclaim all cached
|
|
// blocks.
|
|
Timeline::ReclaimCachedBlocksFromThreads();
|
|
#endif
|
|
|
|
// Dump all timing data for the isolate.
|
|
#if defined(SUPPORT_TIMELINE) && !defined(PRODUCT)
|
|
if (FLAG_timing) {
|
|
TimelinePauseTrace tpt;
|
|
tpt.Print();
|
|
}
|
|
#endif // !PRODUCT
|
|
|
|
// Finalize any weak persistent handles with a non-null referent.
|
|
FinalizeWeakPersistentHandlesVisitor visitor;
|
|
api_state()->weak_persistent_handles().VisitHandles(&visitor);
|
|
|
|
#if !defined(PRODUCT)
|
|
if (FLAG_dump_megamorphic_stats) {
|
|
MegamorphicCacheTable::PrintSizes(this);
|
|
}
|
|
if (FLAG_dump_symbol_stats) {
|
|
Symbols::DumpStats(this);
|
|
}
|
|
if (FLAG_trace_isolates) {
|
|
heap()->PrintSizes();
|
|
OS::PrintErr(
|
|
"[-] Stopping isolate:\n"
|
|
"\tisolate: %s\n",
|
|
name());
|
|
}
|
|
if (FLAG_print_metrics || FLAG_print_benchmarking_metrics) {
|
|
LogBlock lb;
|
|
OS::PrintErr("Printing metrics for %s\n", name());
|
|
#define ISOLATE_METRIC_PRINT(type, variable, name, unit) \
|
|
OS::PrintErr("%s\n", metric_##variable##_.ToString());
|
|
ISOLATE_METRIC_LIST(ISOLATE_METRIC_PRINT)
|
|
#undef ISOLATE_METRIC_PRINT
|
|
OS::PrintErr("\n");
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
}
|
|
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
void Isolate::MaybeIncreaseReloadEveryNStackOverflowChecks() {
|
|
if (FLAG_reload_every_back_off) {
|
|
if (reload_every_n_stack_overflow_checks_ < 5000) {
|
|
reload_every_n_stack_overflow_checks_ += 99;
|
|
} else {
|
|
reload_every_n_stack_overflow_checks_ *= 2;
|
|
}
|
|
// Cap the value.
|
|
if (reload_every_n_stack_overflow_checks_ > 1000000) {
|
|
reload_every_n_stack_overflow_checks_ = 1000000;
|
|
}
|
|
}
|
|
}
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
void Isolate::set_forward_table_new(WeakTable* table) {
|
|
std::unique_ptr<WeakTable> value(table);
|
|
forward_table_new_ = std::move(value);
|
|
}
|
|
void Isolate::set_forward_table_old(WeakTable* table) {
|
|
std::unique_ptr<WeakTable> value(table);
|
|
forward_table_old_ = std::move(value);
|
|
}
|
|
|
|
void Isolate::Shutdown() {
|
|
ASSERT(this == Isolate::Current());
|
|
BackgroundCompiler::Stop(this);
|
|
if (FLAG_enable_interpreter) {
|
|
delete background_compiler_;
|
|
background_compiler_ = nullptr;
|
|
}
|
|
delete optimizing_background_compiler_;
|
|
optimizing_background_compiler_ = nullptr;
|
|
|
|
#if defined(DEBUG)
|
|
if (heap_ != nullptr && FLAG_verify_on_transition) {
|
|
// The VM isolate keeps all objects marked.
|
|
heap_->Verify(this == Dart::vm_isolate() ? kRequireMarked : kForbidMarked);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
Thread* thread = Thread::Current();
|
|
|
|
// Don't allow anymore dart code to execution on this isolate.
|
|
thread->ClearStackLimit();
|
|
|
|
// Remove this isolate from the list *before* we start tearing it down, to
|
|
// avoid exposing it in a state of decay.
|
|
RemoveIsolateFromList(this);
|
|
|
|
{
|
|
// After removal from isolate list. Before tearing down the heap.
|
|
StackZone zone(thread);
|
|
HandleScope handle_scope(thread);
|
|
ServiceIsolate::SendIsolateShutdownMessage();
|
|
KernelIsolate::NotifyAboutIsolateShutdown(this);
|
|
#if !defined(PRODUCT)
|
|
debugger()->Shutdown();
|
|
#endif
|
|
}
|
|
|
|
if (heap_ != nullptr) {
|
|
// Wait for any concurrent GC tasks to finish before shutting down.
|
|
// TODO(rmacnak): Interrupt tasks for faster shutdown.
|
|
PageSpace* old_space = heap_->old_space();
|
|
MonitorLocker ml(old_space->tasks_lock());
|
|
while (old_space->tasks() > 0) {
|
|
ml.Wait();
|
|
}
|
|
// Needs to happen before ~PageSpace so TLS and the thread registery are
|
|
// still valid.
|
|
old_space->AbandonMarkingForShutdown();
|
|
}
|
|
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (FLAG_check_reloaded && is_runnable() &&
|
|
!Isolate::IsVMInternalIsolate(this)) {
|
|
if (!HasAttemptedReload()) {
|
|
FATAL(
|
|
"Isolate did not reload before exiting and "
|
|
"--check-reloaded is enabled.\n");
|
|
}
|
|
}
|
|
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
// Then, proceed with low-level teardown.
|
|
LowLevelShutdown();
|
|
|
|
#if defined(DEBUG)
|
|
// No concurrent sweeper tasks should be running at this point.
|
|
if (heap_ != nullptr) {
|
|
PageSpace* old_space = heap_->old_space();
|
|
MonitorLocker ml(old_space->tasks_lock());
|
|
ASSERT(old_space->tasks() == 0);
|
|
}
|
|
#endif
|
|
|
|
// TODO(5411455): For now just make sure there are no current isolates
|
|
// as we are shutting down the isolate.
|
|
Thread::ExitIsolate();
|
|
|
|
// Run isolate specific cleanup function for all non "vm-isolate's.
|
|
if (Dart::vm_isolate() != this) {
|
|
Dart_IsolateCleanupCallback cleanup = Isolate::CleanupCallback();
|
|
if (cleanup != nullptr) {
|
|
cleanup(isolate_group_->embedder_data(), init_callback_data());
|
|
}
|
|
}
|
|
}
|
|
|
|
Dart_InitializeIsolateCallback Isolate::initialize_callback_ = nullptr;
|
|
Dart_IsolateGroupCreateCallback Isolate::create_group_callback_ = nullptr;
|
|
Dart_IsolateShutdownCallback Isolate::shutdown_callback_ = nullptr;
|
|
Dart_IsolateCleanupCallback Isolate::cleanup_callback_ = nullptr;
|
|
Dart_IsolateGroupCleanupCallback Isolate::cleanup_group_callback_ = nullptr;
|
|
|
|
Monitor* Isolate::isolates_list_monitor_ = nullptr;
|
|
Isolate* Isolate::isolates_list_head_ = nullptr;
|
|
bool Isolate::creation_enabled_ = false;
|
|
|
|
void Isolate::VisitObjectPointers(ObjectPointerVisitor* visitor,
|
|
ValidationPolicy validate_frames) {
|
|
ASSERT(visitor != nullptr);
|
|
|
|
// Visit objects in the object store.
|
|
object_store()->VisitObjectPointers(visitor);
|
|
|
|
// Visit objects in the class table.
|
|
class_table()->VisitObjectPointers(visitor);
|
|
|
|
// Visit the dart api state for all local and persistent handles.
|
|
if (api_state() != nullptr) {
|
|
api_state()->VisitObjectPointers(visitor);
|
|
}
|
|
|
|
visitor->clear_gc_root_type();
|
|
// Visit the objects directly referenced from the isolate structure.
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(¤t_tag_));
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(&default_tag_));
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(&ic_miss_code_));
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(&tag_table_));
|
|
visitor->VisitPointer(
|
|
reinterpret_cast<RawObject**>(&deoptimized_code_array_));
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(&sticky_error_));
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(&reloaded_kernel_blobs_));
|
|
#if !defined(PRODUCT)
|
|
visitor->VisitPointer(
|
|
reinterpret_cast<RawObject**>(&pending_service_extension_calls_));
|
|
visitor->VisitPointer(
|
|
reinterpret_cast<RawObject**>(®istered_service_extension_handlers_));
|
|
#endif // !defined(PRODUCT)
|
|
// Visit the boxed_field_list_.
|
|
// 'boxed_field_list_' access via mutator and background compilation threads
|
|
// is guarded with a monitor. This means that we can visit it only
|
|
// when at safepoint or the field_list_mutex_ lock has been taken.
|
|
visitor->VisitPointer(reinterpret_cast<RawObject**>(&boxed_field_list_));
|
|
|
|
if (background_compiler() != nullptr) {
|
|
background_compiler()->VisitPointers(visitor);
|
|
}
|
|
if (optimizing_background_compiler() != nullptr) {
|
|
optimizing_background_compiler()->VisitPointers(visitor);
|
|
}
|
|
|
|
#if !defined(PRODUCT)
|
|
// Visit objects in the debugger.
|
|
debugger()->VisitObjectPointers(visitor);
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
// Visit objects that are being used for isolate reload.
|
|
if (reload_context() != nullptr) {
|
|
reload_context()->VisitObjectPointers(visitor);
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (ServiceIsolate::IsServiceIsolate(this)) {
|
|
ServiceIsolate::VisitObjectPointers(visitor);
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
// Visit objects that are being used for deoptimization.
|
|
if (deopt_context() != nullptr) {
|
|
deopt_context()->VisitObjectPointers(visitor);
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
#if defined(TARGET_ARCH_DBC)
|
|
if (simulator() != nullptr) {
|
|
simulator()->VisitObjectPointers(visitor);
|
|
}
|
|
#endif // defined(TARGET_ARCH_DBC)
|
|
|
|
VisitStackPointers(visitor, validate_frames);
|
|
}
|
|
|
|
void Isolate::VisitStackPointers(ObjectPointerVisitor* visitor,
|
|
ValidationPolicy validate_frames) {
|
|
visitor->set_gc_root_type("stack");
|
|
// Visit objects in all threads (e.g., Dart stack, handles in zones).
|
|
thread_registry()->VisitObjectPointers(this, visitor, validate_frames);
|
|
|
|
// Visit mutator thread, even if the isolate isn't entered/scheduled (there
|
|
// might be live API handles to visit).
|
|
if (mutator_thread_ != nullptr) {
|
|
mutator_thread_->VisitObjectPointers(visitor, validate_frames);
|
|
}
|
|
visitor->clear_gc_root_type();
|
|
}
|
|
|
|
void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor) {
|
|
if (api_state() != nullptr) {
|
|
api_state()->VisitWeakHandles(visitor);
|
|
}
|
|
}
|
|
|
|
void Isolate::ReleaseStoreBuffers() {
|
|
thread_registry()->ReleaseStoreBuffers(this);
|
|
}
|
|
|
|
void Isolate::EnableIncrementalBarrier(MarkingStack* marking_stack,
|
|
MarkingStack* deferred_marking_stack) {
|
|
ASSERT(marking_stack_ == nullptr);
|
|
marking_stack_ = marking_stack;
|
|
deferred_marking_stack_ = deferred_marking_stack;
|
|
thread_registry()->AcquireMarkingStacks(this);
|
|
ASSERT(Thread::Current()->is_marking());
|
|
}
|
|
|
|
void Isolate::DisableIncrementalBarrier() {
|
|
thread_registry()->ReleaseMarkingStacks(this);
|
|
ASSERT(marking_stack_ != nullptr);
|
|
marking_stack_ = nullptr;
|
|
deferred_marking_stack_ = nullptr;
|
|
ASSERT(!Thread::Current()->is_marking());
|
|
}
|
|
|
|
RawClass* Isolate::GetClassForHeapWalkAt(intptr_t cid) {
|
|
RawClass* raw_class = nullptr;
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (IsReloading()) {
|
|
raw_class = reload_context()->GetClassForHeapWalkAt(cid);
|
|
} else {
|
|
raw_class = class_table()->At(cid);
|
|
}
|
|
#else
|
|
raw_class = class_table()->At(cid);
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
ASSERT(raw_class != nullptr);
|
|
ASSERT(remapping_cids() || raw_class->ptr()->id_ == cid);
|
|
return raw_class;
|
|
}
|
|
|
|
intptr_t Isolate::GetClassSizeForHeapWalkAt(intptr_t cid) {
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (IsReloading()) {
|
|
return reload_context()->GetClassSizeForHeapWalkAt(cid);
|
|
} else {
|
|
return class_table()->SizeAt(cid);
|
|
}
|
|
#else
|
|
return class_table()->SizeAt(cid);
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
}
|
|
|
|
void Isolate::AddPendingDeopt(uword fp, uword pc) {
|
|
// GrowableArray::Add is not atomic and may be interrupt by a profiler
|
|
// stack walk.
|
|
MallocGrowableArray<PendingLazyDeopt>* old_pending_deopts = pending_deopts_;
|
|
MallocGrowableArray<PendingLazyDeopt>* new_pending_deopts =
|
|
new MallocGrowableArray<PendingLazyDeopt>(old_pending_deopts->length() +
|
|
1);
|
|
for (intptr_t i = 0; i < old_pending_deopts->length(); i++) {
|
|
ASSERT((*old_pending_deopts)[i].fp() != fp);
|
|
new_pending_deopts->Add((*old_pending_deopts)[i]);
|
|
}
|
|
PendingLazyDeopt deopt(fp, pc);
|
|
new_pending_deopts->Add(deopt);
|
|
|
|
pending_deopts_ = new_pending_deopts;
|
|
delete old_pending_deopts;
|
|
}
|
|
|
|
uword Isolate::FindPendingDeopt(uword fp) const {
|
|
for (intptr_t i = 0; i < pending_deopts_->length(); i++) {
|
|
if ((*pending_deopts_)[i].fp() == fp) {
|
|
return (*pending_deopts_)[i].pc();
|
|
}
|
|
}
|
|
FATAL("Missing pending deopt entry");
|
|
return 0;
|
|
}
|
|
|
|
void Isolate::ClearPendingDeoptsAtOrBelow(uword fp) const {
|
|
for (intptr_t i = pending_deopts_->length() - 1; i >= 0; i--) {
|
|
if ((*pending_deopts_)[i].fp() <= fp) {
|
|
pending_deopts_->RemoveAt(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
static const char* ExceptionPauseInfoToServiceEnum(Dart_ExceptionPauseInfo pi) {
|
|
switch (pi) {
|
|
case kPauseOnAllExceptions:
|
|
return "All";
|
|
case kNoPauseOnExceptions:
|
|
return "None";
|
|
case kPauseOnUnhandledExceptions:
|
|
return "Unhandled";
|
|
default:
|
|
UNIMPLEMENTED();
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
void Isolate::PrintJSON(JSONStream* stream, bool ref) {
|
|
if (!FLAG_support_service) {
|
|
return;
|
|
}
|
|
JSONObject jsobj(stream);
|
|
jsobj.AddProperty("type", (ref ? "@Isolate" : "Isolate"));
|
|
jsobj.AddServiceId(ISOLATE_SERVICE_ID_FORMAT_STRING,
|
|
static_cast<int64_t>(main_port()));
|
|
|
|
jsobj.AddProperty("name", name());
|
|
jsobj.AddPropertyF("number", "%" Pd64 "", static_cast<int64_t>(main_port()));
|
|
if (ref) {
|
|
return;
|
|
}
|
|
jsobj.AddPropertyF("_originNumber", "%" Pd64 "",
|
|
static_cast<int64_t>(origin_id()));
|
|
int64_t uptime_millis = UptimeMicros() / kMicrosecondsPerMillisecond;
|
|
int64_t start_time = OS::GetCurrentTimeMillis() - uptime_millis;
|
|
jsobj.AddPropertyTimeMillis("startTime", start_time);
|
|
{
|
|
JSONObject jsheap(&jsobj, "_heaps");
|
|
heap()->PrintToJSONObject(Heap::kNew, &jsheap);
|
|
heap()->PrintToJSONObject(Heap::kOld, &jsheap);
|
|
}
|
|
|
|
jsobj.AddProperty("runnable", is_runnable());
|
|
jsobj.AddProperty("livePorts", message_handler()->live_ports());
|
|
jsobj.AddProperty("pauseOnExit", message_handler()->should_pause_on_exit());
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
jsobj.AddProperty("_isReloading", IsReloading());
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
if (!is_runnable()) {
|
|
// Isolate is not yet runnable.
|
|
ASSERT((debugger() == nullptr) || (debugger()->PauseEvent() == nullptr));
|
|
ServiceEvent pause_event(this, ServiceEvent::kNone);
|
|
jsobj.AddProperty("pauseEvent", &pause_event);
|
|
} else if (message_handler()->should_pause_on_start()) {
|
|
if (message_handler()->is_paused_on_start()) {
|
|
ASSERT((debugger() == nullptr) || (debugger()->PauseEvent() == nullptr));
|
|
ServiceEvent pause_event(this, ServiceEvent::kPauseStart);
|
|
jsobj.AddProperty("pauseEvent", &pause_event);
|
|
} else {
|
|
// Isolate is runnable but not paused on start.
|
|
// Some service clients get confused if they see:
|
|
// NotRunnable -> Runnable -> PausedAtStart
|
|
// Treat Runnable+ShouldPauseOnStart as NotRunnable so they see:
|
|
// NonRunnable -> PausedAtStart
|
|
// The should_pause_on_start flag is set to false after resume.
|
|
ASSERT((debugger() == nullptr) || (debugger()->PauseEvent() == nullptr));
|
|
ServiceEvent pause_event(this, ServiceEvent::kNone);
|
|
jsobj.AddProperty("pauseEvent", &pause_event);
|
|
}
|
|
} else if (message_handler()->is_paused_on_exit() &&
|
|
((debugger() == nullptr) ||
|
|
(debugger()->PauseEvent() == nullptr))) {
|
|
ServiceEvent pause_event(this, ServiceEvent::kPauseExit);
|
|
jsobj.AddProperty("pauseEvent", &pause_event);
|
|
} else if ((debugger() != nullptr) && (debugger()->PauseEvent() != nullptr) &&
|
|
!ResumeRequest()) {
|
|
jsobj.AddProperty("pauseEvent", debugger()->PauseEvent());
|
|
} else {
|
|
ServiceEvent pause_event(this, ServiceEvent::kResume);
|
|
|
|
if (debugger() != nullptr) {
|
|
// TODO(turnidge): Don't compute a full stack trace.
|
|
DebuggerStackTrace* stack = debugger()->StackTrace();
|
|
if (stack->Length() > 0) {
|
|
pause_event.set_top_frame(stack->FrameAt(0));
|
|
}
|
|
}
|
|
jsobj.AddProperty("pauseEvent", &pause_event);
|
|
}
|
|
|
|
const Library& lib = Library::Handle(object_store()->root_library());
|
|
if (!lib.IsNull()) {
|
|
jsobj.AddProperty("rootLib", lib);
|
|
}
|
|
|
|
intptr_t zone_handle_count = thread_registry()->CountZoneHandles(this);
|
|
intptr_t scoped_handle_count = thread_registry()->CountScopedHandles(this);
|
|
|
|
jsobj.AddProperty("_numZoneHandles", zone_handle_count);
|
|
jsobj.AddProperty("_numScopedHandles", scoped_handle_count);
|
|
|
|
if (FLAG_profiler) {
|
|
JSONObject tagCounters(&jsobj, "_tagCounters");
|
|
vm_tag_counters()->PrintToJSONObject(&tagCounters);
|
|
}
|
|
if (Thread::Current()->sticky_error() != Object::null()) {
|
|
Error& error = Error::Handle(Thread::Current()->sticky_error());
|
|
ASSERT(!error.IsNull());
|
|
jsobj.AddProperty("error", error, false);
|
|
} else if (sticky_error() != Object::null()) {
|
|
Error& error = Error::Handle(sticky_error());
|
|
ASSERT(!error.IsNull());
|
|
jsobj.AddProperty("error", error, false);
|
|
}
|
|
|
|
{
|
|
const GrowableObjectArray& libs =
|
|
GrowableObjectArray::Handle(object_store()->libraries());
|
|
intptr_t num_libs = libs.Length();
|
|
Library& lib = Library::Handle();
|
|
|
|
JSONArray lib_array(&jsobj, "libraries");
|
|
for (intptr_t i = 0; i < num_libs; i++) {
|
|
lib ^= libs.At(i);
|
|
ASSERT(!lib.IsNull());
|
|
lib_array.AddValue(lib);
|
|
}
|
|
}
|
|
|
|
{
|
|
JSONArray breakpoints(&jsobj, "breakpoints");
|
|
if (debugger() != nullptr) {
|
|
debugger()->PrintBreakpointsToJSONArray(&breakpoints);
|
|
}
|
|
}
|
|
|
|
Dart_ExceptionPauseInfo pause_info = (debugger() != nullptr)
|
|
? debugger()->GetExceptionPauseInfo()
|
|
: kNoPauseOnExceptions;
|
|
jsobj.AddProperty("exceptionPauseMode",
|
|
ExceptionPauseInfoToServiceEnum(pause_info));
|
|
|
|
if (debugger() != nullptr) {
|
|
JSONObject settings(&jsobj, "_debuggerSettings");
|
|
debugger()->PrintSettingsToJSONObject(&settings);
|
|
}
|
|
|
|
{
|
|
GrowableObjectArray& handlers =
|
|
GrowableObjectArray::Handle(registered_service_extension_handlers());
|
|
if (!handlers.IsNull()) {
|
|
JSONArray extensions(&jsobj, "extensionRPCs");
|
|
String& handler_name = String::Handle();
|
|
for (intptr_t i = 0; i < handlers.Length(); i += kRegisteredEntrySize) {
|
|
handler_name ^= handlers.At(i + kRegisteredNameIndex);
|
|
extensions.AddValue(handler_name.ToCString());
|
|
}
|
|
}
|
|
}
|
|
|
|
jsobj.AddProperty("_threads", thread_registry());
|
|
}
|
|
|
|
void Isolate::PrintMemoryUsageJSON(JSONStream* stream) {
|
|
if (!FLAG_support_service) {
|
|
return;
|
|
}
|
|
heap()->PrintMemoryUsageJSON(stream);
|
|
}
|
|
|
|
#endif
|
|
|
|
void Isolate::set_tag_table(const GrowableObjectArray& value) {
|
|
tag_table_ = value.raw();
|
|
}
|
|
|
|
void Isolate::set_current_tag(const UserTag& tag) {
|
|
uword user_tag = tag.tag();
|
|
ASSERT(user_tag < kUwordMax);
|
|
set_user_tag(user_tag);
|
|
current_tag_ = tag.raw();
|
|
}
|
|
|
|
void Isolate::set_default_tag(const UserTag& tag) {
|
|
default_tag_ = tag.raw();
|
|
}
|
|
|
|
void Isolate::set_ic_miss_code(const Code& code) {
|
|
ic_miss_code_ = code.raw();
|
|
}
|
|
|
|
void Isolate::set_deoptimized_code_array(const GrowableObjectArray& value) {
|
|
ASSERT(Thread::Current()->IsMutatorThread());
|
|
deoptimized_code_array_ = value.raw();
|
|
}
|
|
|
|
void Isolate::TrackDeoptimizedCode(const Code& code) {
|
|
ASSERT(!code.IsNull());
|
|
const GrowableObjectArray& deoptimized_code =
|
|
GrowableObjectArray::Handle(deoptimized_code_array());
|
|
if (deoptimized_code.IsNull()) {
|
|
// Not tracking deoptimized code.
|
|
return;
|
|
}
|
|
// TODO(johnmccutchan): Scan this array and the isolate's profile before
|
|
// old space GC and remove the keep_code flag.
|
|
deoptimized_code.Add(code);
|
|
}
|
|
|
|
RawError* Isolate::StealStickyError() {
|
|
NoSafepointScope no_safepoint;
|
|
RawError* return_value = sticky_error_;
|
|
sticky_error_ = Error::null();
|
|
return return_value;
|
|
}
|
|
|
|
#if !defined(PRODUCT)
|
|
void Isolate::set_pending_service_extension_calls(
|
|
const GrowableObjectArray& value) {
|
|
pending_service_extension_calls_ = value.raw();
|
|
}
|
|
|
|
void Isolate::set_registered_service_extension_handlers(
|
|
const GrowableObjectArray& value) {
|
|
registered_service_extension_handlers_ = value.raw();
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
|
|
void Isolate::AddDeoptimizingBoxedField(const Field& field) {
|
|
ASSERT(Compiler::IsBackgroundCompilation());
|
|
ASSERT(!field.IsOriginal());
|
|
// The enclosed code allocates objects and can potentially trigger a GC,
|
|
// ensure that we account for safepoints when grabbing the lock.
|
|
SafepointMutexLocker ml(&field_list_mutex_);
|
|
if (boxed_field_list_ == GrowableObjectArray::null()) {
|
|
boxed_field_list_ = GrowableObjectArray::New(Heap::kOld);
|
|
}
|
|
const GrowableObjectArray& array =
|
|
GrowableObjectArray::Handle(boxed_field_list_);
|
|
array.Add(Field::Handle(field.Original()), Heap::kOld);
|
|
}
|
|
|
|
RawField* Isolate::GetDeoptimizingBoxedField() {
|
|
ASSERT(Thread::Current()->IsMutatorThread());
|
|
SafepointMutexLocker ml(&field_list_mutex_);
|
|
if (boxed_field_list_ == GrowableObjectArray::null()) {
|
|
return Field::null();
|
|
}
|
|
const GrowableObjectArray& array =
|
|
GrowableObjectArray::Handle(boxed_field_list_);
|
|
if (array.Length() == 0) {
|
|
return Field::null();
|
|
}
|
|
return Field::RawCast(array.RemoveLast());
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
RawError* Isolate::InvokePendingServiceExtensionCalls() {
|
|
if (!FLAG_support_service) {
|
|
return Error::null();
|
|
}
|
|
GrowableObjectArray& calls =
|
|
GrowableObjectArray::Handle(GetAndClearPendingServiceExtensionCalls());
|
|
if (calls.IsNull()) {
|
|
return Error::null();
|
|
}
|
|
// Grab run function.
|
|
const Library& developer_lib = Library::Handle(Library::DeveloperLibrary());
|
|
ASSERT(!developer_lib.IsNull());
|
|
const Function& run_extension = Function::Handle(
|
|
developer_lib.LookupLocalFunction(Symbols::_runExtension()));
|
|
ASSERT(!run_extension.IsNull());
|
|
|
|
const Array& arguments =
|
|
Array::Handle(Array::New(kPendingEntrySize + 1, Heap::kNew));
|
|
Object& result = Object::Handle();
|
|
String& method_name = String::Handle();
|
|
Instance& closure = Instance::Handle();
|
|
Array& parameter_keys = Array::Handle();
|
|
Array& parameter_values = Array::Handle();
|
|
Instance& reply_port = Instance::Handle();
|
|
Instance& id = Instance::Handle();
|
|
for (intptr_t i = 0; i < calls.Length(); i += kPendingEntrySize) {
|
|
// Grab arguments for call.
|
|
closure ^= calls.At(i + kPendingHandlerIndex);
|
|
ASSERT(!closure.IsNull());
|
|
arguments.SetAt(kPendingHandlerIndex, closure);
|
|
method_name ^= calls.At(i + kPendingMethodNameIndex);
|
|
ASSERT(!method_name.IsNull());
|
|
arguments.SetAt(kPendingMethodNameIndex, method_name);
|
|
parameter_keys ^= calls.At(i + kPendingKeysIndex);
|
|
ASSERT(!parameter_keys.IsNull());
|
|
arguments.SetAt(kPendingKeysIndex, parameter_keys);
|
|
parameter_values ^= calls.At(i + kPendingValuesIndex);
|
|
ASSERT(!parameter_values.IsNull());
|
|
arguments.SetAt(kPendingValuesIndex, parameter_values);
|
|
reply_port ^= calls.At(i + kPendingReplyPortIndex);
|
|
ASSERT(!reply_port.IsNull());
|
|
arguments.SetAt(kPendingReplyPortIndex, reply_port);
|
|
id ^= calls.At(i + kPendingIdIndex);
|
|
arguments.SetAt(kPendingIdIndex, id);
|
|
arguments.SetAt(kPendingEntrySize, Bool::Get(FLAG_trace_service));
|
|
|
|
if (FLAG_trace_service) {
|
|
OS::PrintErr("[+%" Pd64 "ms] Isolate %s invoking _runExtension for %s\n",
|
|
Dart::UptimeMillis(), name(), method_name.ToCString());
|
|
}
|
|
result = DartEntry::InvokeFunction(run_extension, arguments);
|
|
if (FLAG_trace_service) {
|
|
OS::PrintErr("[+%" Pd64 "ms] Isolate %s _runExtension complete for %s\n",
|
|
Dart::UptimeMillis(), name(), method_name.ToCString());
|
|
}
|
|
// Propagate the error.
|
|
if (result.IsError()) {
|
|
// Remaining service extension calls are dropped.
|
|
if (!result.IsUnwindError()) {
|
|
// Send error back over the protocol.
|
|
Service::PostError(method_name, parameter_keys, parameter_values,
|
|
reply_port, id, Error::Cast(result));
|
|
}
|
|
return Error::Cast(result).raw();
|
|
}
|
|
// Drain the microtask queue.
|
|
result = DartLibraryCalls::DrainMicrotaskQueue();
|
|
// Propagate the error.
|
|
if (result.IsError()) {
|
|
// Remaining service extension calls are dropped.
|
|
return Error::Cast(result).raw();
|
|
}
|
|
}
|
|
return Error::null();
|
|
}
|
|
|
|
RawGrowableObjectArray* Isolate::GetAndClearPendingServiceExtensionCalls() {
|
|
RawGrowableObjectArray* r = pending_service_extension_calls_;
|
|
pending_service_extension_calls_ = GrowableObjectArray::null();
|
|
return r;
|
|
}
|
|
|
|
void Isolate::AppendServiceExtensionCall(const Instance& closure,
|
|
const String& method_name,
|
|
const Array& parameter_keys,
|
|
const Array& parameter_values,
|
|
const Instance& reply_port,
|
|
const Instance& id) {
|
|
if (FLAG_trace_service) {
|
|
OS::PrintErr("[+%" Pd64
|
|
"ms] Isolate %s ENQUEUING request for extension %s\n",
|
|
Dart::UptimeMillis(), name(), method_name.ToCString());
|
|
}
|
|
GrowableObjectArray& calls =
|
|
GrowableObjectArray::Handle(pending_service_extension_calls());
|
|
bool schedule_drain = false;
|
|
if (calls.IsNull()) {
|
|
calls = GrowableObjectArray::New();
|
|
ASSERT(!calls.IsNull());
|
|
set_pending_service_extension_calls(calls);
|
|
schedule_drain = true;
|
|
}
|
|
ASSERT(kPendingHandlerIndex == 0);
|
|
calls.Add(closure);
|
|
ASSERT(kPendingMethodNameIndex == 1);
|
|
calls.Add(method_name);
|
|
ASSERT(kPendingKeysIndex == 2);
|
|
calls.Add(parameter_keys);
|
|
ASSERT(kPendingValuesIndex == 3);
|
|
calls.Add(parameter_values);
|
|
ASSERT(kPendingReplyPortIndex == 4);
|
|
calls.Add(reply_port);
|
|
ASSERT(kPendingIdIndex == 5);
|
|
calls.Add(id);
|
|
|
|
if (schedule_drain) {
|
|
const Array& msg = Array::Handle(Array::New(3));
|
|
Object& element = Object::Handle();
|
|
element = Smi::New(Message::kIsolateLibOOBMsg);
|
|
msg.SetAt(0, element);
|
|
element = Smi::New(Isolate::kDrainServiceExtensionsMsg);
|
|
msg.SetAt(1, element);
|
|
element = Smi::New(Isolate::kBeforeNextEventAction);
|
|
msg.SetAt(2, element);
|
|
MessageWriter writer(false);
|
|
std::unique_ptr<Message> message =
|
|
writer.WriteMessage(msg, main_port(), Message::kOOBPriority);
|
|
bool posted = PortMap::PostMessage(std::move(message));
|
|
ASSERT(posted);
|
|
}
|
|
}
|
|
|
|
// This function is written in C++ and not Dart because we must do this
|
|
// operation atomically in the face of random OOB messages. Do not port
|
|
// to Dart code unless you can ensure that the operations will can be
|
|
// done atomically.
|
|
void Isolate::RegisterServiceExtensionHandler(const String& name,
|
|
const Instance& closure) {
|
|
if (!FLAG_support_service || Isolate::IsVMInternalIsolate(this)) {
|
|
return;
|
|
}
|
|
GrowableObjectArray& handlers =
|
|
GrowableObjectArray::Handle(registered_service_extension_handlers());
|
|
if (handlers.IsNull()) {
|
|
handlers = GrowableObjectArray::New(Heap::kOld);
|
|
set_registered_service_extension_handlers(handlers);
|
|
}
|
|
#if defined(DEBUG)
|
|
{
|
|
// Sanity check.
|
|
const Instance& existing_handler =
|
|
Instance::Handle(LookupServiceExtensionHandler(name));
|
|
ASSERT(existing_handler.IsNull());
|
|
}
|
|
#endif
|
|
ASSERT(kRegisteredNameIndex == 0);
|
|
handlers.Add(name, Heap::kOld);
|
|
ASSERT(kRegisteredHandlerIndex == 1);
|
|
handlers.Add(closure, Heap::kOld);
|
|
{
|
|
// Fire off an event.
|
|
ServiceEvent event(this, ServiceEvent::kServiceExtensionAdded);
|
|
event.set_extension_rpc(&name);
|
|
Service::HandleEvent(&event);
|
|
}
|
|
}
|
|
|
|
// This function is written in C++ and not Dart because we must do this
|
|
// operation atomically in the face of random OOB messages. Do not port
|
|
// to Dart code unless you can ensure that the operations will can be
|
|
// done atomically.
|
|
RawInstance* Isolate::LookupServiceExtensionHandler(const String& name) {
|
|
if (!FLAG_support_service) {
|
|
return Instance::null();
|
|
}
|
|
const GrowableObjectArray& handlers =
|
|
GrowableObjectArray::Handle(registered_service_extension_handlers());
|
|
if (handlers.IsNull()) {
|
|
return Instance::null();
|
|
}
|
|
String& handler_name = String::Handle();
|
|
for (intptr_t i = 0; i < handlers.Length(); i += kRegisteredEntrySize) {
|
|
handler_name ^= handlers.At(i + kRegisteredNameIndex);
|
|
ASSERT(!handler_name.IsNull());
|
|
if (handler_name.Equals(name)) {
|
|
return Instance::RawCast(handlers.At(i + kRegisteredHandlerIndex));
|
|
}
|
|
}
|
|
return Instance::null();
|
|
}
|
|
|
|
void Isolate::WakePauseEventHandler(Dart_Isolate isolate) {
|
|
Isolate* iso = reinterpret_cast<Isolate*>(isolate);
|
|
MonitorLocker ml(iso->pause_loop_monitor_);
|
|
ml.Notify();
|
|
}
|
|
|
|
void Isolate::PauseEventHandler() {
|
|
// We are stealing a pause event (like a breakpoint) from the
|
|
// embedder. We don't know what kind of thread we are on -- it
|
|
// could be from our thread pool or it could be a thread from the
|
|
// embedder. Sit on the current thread handling service events
|
|
// until we are told to resume.
|
|
if (pause_loop_monitor_ == nullptr) {
|
|
pause_loop_monitor_ = new Monitor();
|
|
}
|
|
Dart_EnterScope();
|
|
MonitorLocker ml(pause_loop_monitor_, false);
|
|
|
|
Dart_MessageNotifyCallback saved_notify_callback = message_notify_callback();
|
|
set_message_notify_callback(Isolate::WakePauseEventHandler);
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
const bool had_isolate_reload_context = reload_context() != nullptr;
|
|
const int64_t start_time_micros =
|
|
!had_isolate_reload_context ? 0 : reload_context()->start_time_micros();
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
bool resume = false;
|
|
bool handle_non_service_messages = false;
|
|
while (true) {
|
|
// Handle all available vm service messages, up to a resume
|
|
// request.
|
|
while (!resume && Dart_HasServiceMessages()) {
|
|
ml.Exit();
|
|
resume = Dart_HandleServiceMessages();
|
|
ml.Enter();
|
|
}
|
|
if (resume) {
|
|
break;
|
|
} else {
|
|
handle_non_service_messages = true;
|
|
}
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (had_isolate_reload_context && (reload_context() == nullptr)) {
|
|
if (FLAG_trace_reload) {
|
|
const int64_t reload_time_micros =
|
|
OS::GetCurrentMonotonicMicros() - start_time_micros;
|
|
double reload_millis = MicrosecondsToMilliseconds(reload_time_micros);
|
|
OS::PrintErr("Reloading has finished! (%.2f ms)\n", reload_millis);
|
|
}
|
|
break;
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
// Wait for more service messages.
|
|
Monitor::WaitResult res = ml.Wait();
|
|
ASSERT(res == Monitor::kNotified);
|
|
}
|
|
// If any non-service messages came in, we need to notify the registered
|
|
// message notify callback to check for unhandled messages. Otherwise, events
|
|
// may be left unhandled until the next event comes in. See
|
|
// https://github.com/dart-lang/sdk/issues/37312.
|
|
if ((saved_notify_callback != nullptr) && handle_non_service_messages) {
|
|
saved_notify_callback(Api::CastIsolate(this));
|
|
}
|
|
set_message_notify_callback(saved_notify_callback);
|
|
Dart_ExitScope();
|
|
}
|
|
#endif // !PRODUCT
|
|
|
|
void Isolate::VisitIsolates(IsolateVisitor* visitor) {
|
|
if (visitor == nullptr) {
|
|
return;
|
|
}
|
|
// The visitor could potentially run code that could safepoint so use
|
|
// SafepointMonitorLocker to ensure the lock has safepoint checks.
|
|
SafepointMonitorLocker ml(isolates_list_monitor_);
|
|
Isolate* current = isolates_list_head_;
|
|
while (current != nullptr) {
|
|
visitor->VisitIsolate(current);
|
|
current = current->next_;
|
|
}
|
|
}
|
|
|
|
intptr_t Isolate::IsolateListLength() {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
intptr_t count = 0;
|
|
Isolate* current = isolates_list_head_;
|
|
while (current != nullptr) {
|
|
count++;
|
|
current = current->next_;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
Isolate* Isolate::LookupIsolateByPort(Dart_Port port) {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
Isolate* current = isolates_list_head_;
|
|
while (current != nullptr) {
|
|
if (current->main_port() == port) {
|
|
return current;
|
|
}
|
|
current = current->next_;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
std::unique_ptr<char[]> Isolate::LookupIsolateNameByPort(Dart_Port port) {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
Isolate* current = isolates_list_head_;
|
|
while (current != nullptr) {
|
|
if (current->main_port() == port) {
|
|
const size_t len = strlen(current->name()) + 1;
|
|
auto result = std::unique_ptr<char[]>(new char[len]);
|
|
strncpy(result.get(), current->name(), len);
|
|
return result;
|
|
}
|
|
current = current->next_;
|
|
}
|
|
return std::unique_ptr<char[]>();
|
|
}
|
|
|
|
bool Isolate::AddIsolateToList(Isolate* isolate) {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
if (!creation_enabled_) {
|
|
return false;
|
|
}
|
|
ASSERT(isolate != nullptr);
|
|
ASSERT(isolate->next_ == nullptr);
|
|
isolate->next_ = isolates_list_head_;
|
|
isolates_list_head_ = isolate;
|
|
return true;
|
|
}
|
|
|
|
void Isolate::RemoveIsolateFromList(Isolate* isolate) {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
ASSERT(isolate != nullptr);
|
|
if (isolate == isolates_list_head_) {
|
|
isolates_list_head_ = isolate->next_;
|
|
if (!creation_enabled_) {
|
|
ml.Notify();
|
|
}
|
|
return;
|
|
}
|
|
Isolate* previous = nullptr;
|
|
Isolate* current = isolates_list_head_;
|
|
while (current != nullptr) {
|
|
if (current == isolate) {
|
|
ASSERT(previous != nullptr);
|
|
previous->next_ = current->next_;
|
|
if (!creation_enabled_) {
|
|
ml.Notify();
|
|
}
|
|
return;
|
|
}
|
|
previous = current;
|
|
current = current->next_;
|
|
}
|
|
// If we are shutting down the VM, the isolate may not be in the list.
|
|
ASSERT(!creation_enabled_);
|
|
}
|
|
|
|
void Isolate::DisableIsolateCreation() {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
creation_enabled_ = false;
|
|
}
|
|
|
|
void Isolate::EnableIsolateCreation() {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
creation_enabled_ = true;
|
|
}
|
|
|
|
bool Isolate::IsolateCreationEnabled() {
|
|
MonitorLocker ml(isolates_list_monitor_);
|
|
return creation_enabled_;
|
|
}
|
|
|
|
bool Isolate::IsVMInternalIsolate(const Isolate* isolate) {
|
|
return (isolate == Dart::vm_isolate()) ||
|
|
ServiceIsolate::IsServiceIsolateDescendant(isolate) ||
|
|
KernelIsolate::IsKernelIsolate(isolate);
|
|
}
|
|
|
|
void Isolate::KillLocked(LibMsgId msg_id) {
|
|
Dart_CObject kill_msg;
|
|
Dart_CObject* list_values[4];
|
|
kill_msg.type = Dart_CObject_kArray;
|
|
kill_msg.value.as_array.length = 4;
|
|
kill_msg.value.as_array.values = list_values;
|
|
|
|
Dart_CObject oob;
|
|
oob.type = Dart_CObject_kInt32;
|
|
oob.value.as_int32 = Message::kIsolateLibOOBMsg;
|
|
list_values[0] = &oob;
|
|
|
|
Dart_CObject msg_type;
|
|
msg_type.type = Dart_CObject_kInt32;
|
|
msg_type.value.as_int32 = msg_id;
|
|
list_values[1] = &msg_type;
|
|
|
|
Dart_CObject cap;
|
|
cap.type = Dart_CObject_kCapability;
|
|
cap.value.as_capability.id = terminate_capability();
|
|
list_values[2] = ∩
|
|
|
|
Dart_CObject imm;
|
|
imm.type = Dart_CObject_kInt32;
|
|
imm.value.as_int32 = Isolate::kImmediateAction;
|
|
list_values[3] = &imm;
|
|
|
|
{
|
|
ApiMessageWriter writer;
|
|
std::unique_ptr<Message> message =
|
|
writer.WriteCMessage(&kill_msg, main_port(), Message::kOOBPriority);
|
|
ASSERT(message != nullptr);
|
|
|
|
// Post the message at the given port.
|
|
bool success = PortMap::PostMessage(std::move(message));
|
|
ASSERT(success);
|
|
}
|
|
}
|
|
|
|
class IsolateKillerVisitor : public IsolateVisitor {
|
|
public:
|
|
explicit IsolateKillerVisitor(Isolate::LibMsgId msg_id)
|
|
: target_(nullptr), msg_id_(msg_id) {}
|
|
|
|
IsolateKillerVisitor(Isolate* isolate, Isolate::LibMsgId msg_id)
|
|
: target_(isolate), msg_id_(msg_id) {
|
|
ASSERT(isolate != Dart::vm_isolate());
|
|
}
|
|
|
|
virtual ~IsolateKillerVisitor() {}
|
|
|
|
void VisitIsolate(Isolate* isolate) {
|
|
ASSERT(isolate != nullptr);
|
|
if (ShouldKill(isolate)) {
|
|
isolate->KillLocked(msg_id_);
|
|
}
|
|
}
|
|
|
|
private:
|
|
bool ShouldKill(Isolate* isolate) {
|
|
// If a target_ is specified, then only kill the target_.
|
|
// Otherwise, don't kill the service isolate or vm isolate.
|
|
return (((target_ != nullptr) && (isolate == target_)) ||
|
|
((target_ == nullptr) && !IsVMInternalIsolate(isolate)));
|
|
}
|
|
|
|
Isolate* target_;
|
|
Isolate::LibMsgId msg_id_;
|
|
};
|
|
|
|
void Isolate::KillAllIsolates(LibMsgId msg_id) {
|
|
IsolateKillerVisitor visitor(msg_id);
|
|
VisitIsolates(&visitor);
|
|
}
|
|
|
|
void Isolate::KillIfExists(Isolate* isolate, LibMsgId msg_id) {
|
|
IsolateKillerVisitor visitor(isolate, msg_id);
|
|
VisitIsolates(&visitor);
|
|
}
|
|
|
|
void Isolate::IncrementSpawnCount() {
|
|
MonitorLocker ml(&spawn_count_monitor_);
|
|
spawn_count_++;
|
|
}
|
|
|
|
void Isolate::DecrementSpawnCount() {
|
|
MonitorLocker ml(&spawn_count_monitor_);
|
|
ASSERT(spawn_count_ > 0);
|
|
spawn_count_--;
|
|
ml.Notify();
|
|
}
|
|
|
|
void Isolate::WaitForOutstandingSpawns() {
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread != NULL);
|
|
MonitorLocker ml(&spawn_count_monitor_);
|
|
while (spawn_count_ > 0) {
|
|
ml.WaitWithSafepointCheck(thread);
|
|
}
|
|
}
|
|
|
|
Monitor* IsolateGroup::threads_lock() const {
|
|
return thread_registry_->threads_lock();
|
|
}
|
|
|
|
Thread* Isolate::ScheduleThread(bool is_mutator, bool bypass_safepoint) {
|
|
// We are about to associate the thread with an isolate group and it would
|
|
// not be possible to correctly track no_safepoint_scope_depth for the
|
|
// thread in the constructor/destructor of MonitorLocker,
|
|
// so we create a MonitorLocker object which does not do any
|
|
// no_safepoint_scope_depth increments/decrements.
|
|
MonitorLocker ml(group()->threads_lock(), false);
|
|
|
|
// Check to make sure we don't already have a mutator thread.
|
|
if (is_mutator && scheduled_mutator_thread_ != nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
// NOTE: We cannot just use `Dart::vm_isolate() == this` here, since during
|
|
// VM startup it might not have been set at this point.
|
|
const bool is_vm_isolate =
|
|
Dart::vm_isolate() == nullptr || Dart::vm_isolate() == this;
|
|
|
|
// We lazily create a [Thread] structure for the mutator thread, but we'll
|
|
// reuse it until the death of the isolate.
|
|
Thread* existing_mutator_thread = is_mutator ? mutator_thread_ : nullptr;
|
|
|
|
// Schedule the thread into the isolate by associating a 'Thread' structure
|
|
// with it (this is done while we are holding the thread registry lock).
|
|
Thread* thread =
|
|
group()->ScheduleThreadLocked(&ml, existing_mutator_thread, is_vm_isolate,
|
|
is_mutator, bypass_safepoint);
|
|
if (is_mutator) {
|
|
ASSERT(mutator_thread_ == nullptr || mutator_thread_ == thread);
|
|
mutator_thread_ = thread;
|
|
scheduled_mutator_thread_ = thread;
|
|
}
|
|
thread->isolate_ = this;
|
|
|
|
ASSERT(heap() != nullptr);
|
|
thread->heap_ = heap();
|
|
|
|
return thread;
|
|
}
|
|
|
|
void Isolate::UnscheduleThread(Thread* thread,
|
|
bool is_mutator,
|
|
bool bypass_safepoint) {
|
|
// Disassociate the 'Thread' structure and unschedule the thread
|
|
// from this isolate.
|
|
// We are disassociating the thread from an isolate and it would
|
|
// not be possible to correctly track no_safepoint_scope_depth for the
|
|
// thread in the constructor/destructor of MonitorLocker,
|
|
// so we create a MonitorLocker object which does not do any
|
|
// no_safepoint_scope_depth increments/decrements.
|
|
MonitorLocker ml(group()->threads_lock(), false);
|
|
|
|
if (is_mutator) {
|
|
if (thread->sticky_error() != Error::null()) {
|
|
ASSERT(sticky_error_ == Error::null());
|
|
sticky_error_ = thread->StealStickyError();
|
|
}
|
|
ASSERT(mutator_thread_ == thread);
|
|
ASSERT(mutator_thread_ == scheduled_mutator_thread_);
|
|
scheduled_mutator_thread_ = nullptr;
|
|
}
|
|
group()->UnscheduleThreadLocked(&ml, thread, is_mutator, bypass_safepoint);
|
|
}
|
|
|
|
static const char* NewConstChar(const char* chars) {
|
|
size_t len = strlen(chars);
|
|
char* mem = new char[len + 1];
|
|
memmove(mem, chars, len + 1);
|
|
return mem;
|
|
}
|
|
|
|
IsolateSpawnState::IsolateSpawnState(Dart_Port parent_port,
|
|
Dart_Port origin_id,
|
|
const char* script_url,
|
|
const Function& func,
|
|
SerializedObjectBuffer* message_buffer,
|
|
const char* package_config,
|
|
bool paused,
|
|
bool errors_are_fatal,
|
|
Dart_Port on_exit_port,
|
|
Dart_Port on_error_port,
|
|
const char* debug_name,
|
|
IsolateGroup* isolate_group)
|
|
: isolate_(nullptr),
|
|
parent_port_(parent_port),
|
|
origin_id_(origin_id),
|
|
on_exit_port_(on_exit_port),
|
|
on_error_port_(on_error_port),
|
|
script_url_(script_url),
|
|
package_config_(package_config),
|
|
library_url_(nullptr),
|
|
class_name_(nullptr),
|
|
function_name_(nullptr),
|
|
debug_name_(debug_name),
|
|
isolate_group_(isolate_group),
|
|
serialized_args_(nullptr),
|
|
serialized_message_(message_buffer->StealMessage()),
|
|
paused_(paused),
|
|
errors_are_fatal_(errors_are_fatal) {
|
|
const Class& cls = Class::Handle(func.Owner());
|
|
const Library& lib = Library::Handle(cls.library());
|
|
const String& lib_url = String::Handle(lib.url());
|
|
library_url_ = NewConstChar(lib_url.ToCString());
|
|
|
|
String& func_name = String::Handle();
|
|
func_name = func.name();
|
|
func_name = String::ScrubName(func_name);
|
|
function_name_ = NewConstChar(func_name.ToCString());
|
|
if (!cls.IsTopLevel()) {
|
|
const String& class_name = String::Handle(cls.Name());
|
|
class_name_ = NewConstChar(class_name.ToCString());
|
|
}
|
|
|
|
// Inherit flags from spawning isolate.
|
|
Isolate::Current()->FlagsCopyTo(isolate_flags());
|
|
}
|
|
|
|
IsolateSpawnState::IsolateSpawnState(Dart_Port parent_port,
|
|
const char* script_url,
|
|
const char* package_config,
|
|
SerializedObjectBuffer* args_buffer,
|
|
SerializedObjectBuffer* message_buffer,
|
|
bool paused,
|
|
bool errors_are_fatal,
|
|
Dart_Port on_exit_port,
|
|
Dart_Port on_error_port,
|
|
const char* debug_name,
|
|
IsolateGroup* group)
|
|
: isolate_(nullptr),
|
|
parent_port_(parent_port),
|
|
origin_id_(ILLEGAL_PORT),
|
|
on_exit_port_(on_exit_port),
|
|
on_error_port_(on_error_port),
|
|
script_url_(script_url),
|
|
package_config_(package_config),
|
|
library_url_(nullptr),
|
|
class_name_(nullptr),
|
|
function_name_(nullptr),
|
|
debug_name_(debug_name),
|
|
isolate_group_(group),
|
|
serialized_args_(args_buffer->StealMessage()),
|
|
serialized_message_(message_buffer->StealMessage()),
|
|
isolate_flags_(),
|
|
paused_(paused),
|
|
errors_are_fatal_(errors_are_fatal) {
|
|
function_name_ = NewConstChar("main");
|
|
|
|
// By default inherit flags from spawning isolate. These can be overridden
|
|
// from the calling code.
|
|
Isolate::Current()->FlagsCopyTo(isolate_flags());
|
|
}
|
|
|
|
IsolateSpawnState::~IsolateSpawnState() {
|
|
delete[] script_url_;
|
|
delete[] package_config_;
|
|
delete[] library_url_;
|
|
delete[] class_name_;
|
|
delete[] function_name_;
|
|
delete[] debug_name_;
|
|
}
|
|
|
|
RawObject* IsolateSpawnState::ResolveFunction() {
|
|
Thread* thread = Thread::Current();
|
|
Zone* zone = thread->zone();
|
|
|
|
const String& func_name = String::Handle(zone, String::New(function_name()));
|
|
|
|
if (library_url() == nullptr) {
|
|
// Handle spawnUri lookup rules.
|
|
// Check whether the root library defines a main function.
|
|
const Library& lib =
|
|
Library::Handle(zone, I->object_store()->root_library());
|
|
Function& func = Function::Handle(zone, lib.LookupLocalFunction(func_name));
|
|
if (func.IsNull()) {
|
|
// Check whether main is reexported from the root library.
|
|
const Object& obj = Object::Handle(zone, lib.LookupReExport(func_name));
|
|
if (obj.IsFunction()) {
|
|
func ^= obj.raw();
|
|
}
|
|
}
|
|
if (func.IsNull()) {
|
|
const String& msg = String::Handle(
|
|
zone, String::NewFormatted(
|
|
"Unable to resolve function '%s' in script '%s'.",
|
|
function_name(), script_url()));
|
|
return LanguageError::New(msg);
|
|
}
|
|
return func.raw();
|
|
}
|
|
|
|
// Lookup the to be spawned function for the Isolate.spawn implementation.
|
|
// Resolve the library.
|
|
const String& lib_url = String::Handle(zone, String::New(library_url()));
|
|
const Library& lib =
|
|
Library::Handle(zone, Library::LookupLibrary(thread, lib_url));
|
|
if (lib.IsNull() || lib.IsError()) {
|
|
const String& msg = String::Handle(
|
|
zone,
|
|
String::NewFormatted("Unable to find library '%s'.", library_url()));
|
|
return LanguageError::New(msg);
|
|
}
|
|
|
|
// Resolve the function.
|
|
if (class_name() == nullptr) {
|
|
const Function& func =
|
|
Function::Handle(zone, lib.LookupLocalFunction(func_name));
|
|
if (func.IsNull()) {
|
|
const String& msg = String::Handle(
|
|
zone, String::NewFormatted(
|
|
"Unable to resolve function '%s' in library '%s'.",
|
|
function_name(), library_url()));
|
|
return LanguageError::New(msg);
|
|
}
|
|
return func.raw();
|
|
}
|
|
|
|
const String& cls_name = String::Handle(zone, String::New(class_name()));
|
|
const Class& cls = Class::Handle(zone, lib.LookupLocalClass(cls_name));
|
|
if (cls.IsNull()) {
|
|
const String& msg = String::Handle(
|
|
zone, String::NewFormatted(
|
|
"Unable to resolve class '%s' in library '%s'.", class_name(),
|
|
(library_url() != nullptr ? library_url() : script_url())));
|
|
return LanguageError::New(msg);
|
|
}
|
|
const Function& func =
|
|
Function::Handle(zone, cls.LookupStaticFunctionAllowPrivate(func_name));
|
|
if (func.IsNull()) {
|
|
const String& msg = String::Handle(
|
|
zone, String::NewFormatted(
|
|
"Unable to resolve static method '%s.%s' in library '%s'.",
|
|
class_name(), function_name(),
|
|
(library_url() != nullptr ? library_url() : script_url())));
|
|
return LanguageError::New(msg);
|
|
}
|
|
return func.raw();
|
|
}
|
|
|
|
RawInstance* IsolateSpawnState::BuildArgs(Thread* thread) {
|
|
return DeserializeMessage(thread, serialized_args_.get());
|
|
}
|
|
|
|
RawInstance* IsolateSpawnState::BuildMessage(Thread* thread) {
|
|
return DeserializeMessage(thread, serialized_message_.get());
|
|
}
|
|
|
|
} // namespace dart
|