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f496e538f4
This is the next step towards preventing compiler from directly peeking into runtime and instead interact with runtime through a well defined surface. The goal of the refactoring to locate all places where compiler accesses some runtime information and partion those accesses into two categories: - creating objects in the host runtime (e.g. allocating strings, numbers, etc) during compilation; - accessing properties of the target runtime (e.g. offsets of fields) to embed those into the generated code; This change introduces dart::compiler and dart::compiler::target namespaces. All code in the compiler will gradually be moved into dart::compiler namespace. One of the motivations for this change is to be able to prevent access to globally defined host constants like kWordSize by shadowing them in the dart::compiler namespace. The nested namespace dart::compiler::target hosts all information about target runtime that compiler could access, e.g. compiler::target::kWordSize defines word size of the target which will eventually be made different from the host kWordSize (defined by dart::kWordSize). The API for compiler to runtime interaction is placed into compiler_api.h. Note that we still permit runtime to access compiler internals directly - this is not going to be decoupled as part of this work. Issue https://github.com/dart-lang/sdk/issues/31709 Change-Id: If4396d295879391becfa6c38d4802bbff81f5b20 Reviewed-on: https://dart-review.googlesource.com/c/90242 Commit-Queue: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/thread_state.h"
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#include "vm/handles_impl.h"
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#include "vm/zone.h"
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namespace dart {
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ThreadState::ThreadState(bool is_os_thread) : BaseThread(is_os_thread) {
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// This thread should not yet own any zones. If it does, we need to make sure
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// we've accounted for any memory it has already allocated.
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if (zone_ == nullptr) {
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ASSERT(current_zone_capacity_ == 0);
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} else {
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Zone* current = zone_;
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uintptr_t total_zone_capacity = 0;
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while (current != nullptr) {
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total_zone_capacity += current->CapacityInBytes();
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current = current->previous();
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}
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ASSERT(current_zone_capacity_ == total_zone_capacity);
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}
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}
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ThreadState::~ThreadState() {}
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bool ThreadState::ZoneIsOwnedByThread(Zone* zone) const {
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ASSERT(zone != nullptr);
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Zone* current = zone_;
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while (current != nullptr) {
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if (current == zone) {
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return true;
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}
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current = current->previous();
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}
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return false;
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}
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bool ThreadState::IsValidZoneHandle(Dart_Handle object) const {
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Zone* zone = this->zone();
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while (zone != NULL) {
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if (zone->handles()->IsValidZoneHandle(reinterpret_cast<uword>(object))) {
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return true;
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}
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zone = zone->previous();
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}
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return false;
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}
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intptr_t ThreadState::CountZoneHandles() const {
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intptr_t count = 0;
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Zone* zone = this->zone();
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while (zone != NULL) {
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count += zone->handles()->CountZoneHandles();
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zone = zone->previous();
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}
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ASSERT(count >= 0);
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return count;
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}
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bool ThreadState::IsValidScopedHandle(Dart_Handle object) const {
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Zone* zone = this->zone();
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while (zone != NULL) {
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if (zone->handles()->IsValidScopedHandle(reinterpret_cast<uword>(object))) {
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return true;
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}
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zone = zone->previous();
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}
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return false;
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}
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intptr_t ThreadState::CountScopedHandles() const {
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intptr_t count = 0;
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Zone* zone = this->zone();
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while (zone != NULL) {
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count += zone->handles()->CountScopedHandles();
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zone = zone->previous();
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}
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ASSERT(count >= 0);
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return count;
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}
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} // namespace dart
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