mirror of
https://github.com/dart-lang/sdk
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115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
// Copyright (c) 2012, 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/handles.h"
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#include "platform/assert.h"
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#include "platform/utils.h"
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#include "vm/dart_api_state.h"
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#include "vm/flags.h"
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#include "vm/os.h"
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#include "vm/raw_object.h"
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#include "vm/visitor.h"
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#include "vm/zone.h"
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#include "vm/handles_impl.h"
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namespace dart {
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DEFINE_FLAG(bool, verify_handles, false, "Verify handles.");
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VMHandles::~VMHandles() {
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if (FLAG_trace_handles) {
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OS::PrintErr("*** Handle Counts for 0x(%" Px "):Zone = %d,Scoped = %d\n",
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reinterpret_cast<intptr_t>(this), CountZoneHandles(),
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CountScopedHandles());
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OS::PrintErr("*** Deleting VM handle block 0x%" Px "\n",
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reinterpret_cast<intptr_t>(this));
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}
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}
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void VMHandles::VisitObjectPointers(ObjectPointerVisitor* visitor) {
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return Handles<kVMHandleSizeInWords, kVMHandlesPerChunk,
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kOffsetOfRawPtr>::VisitObjectPointers(visitor);
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}
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#if defined(DEBUG)
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static bool IsCurrentApiNativeScope(Zone* zone) {
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ApiNativeScope* scope = ApiNativeScope::Current();
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return (scope != NULL) && (scope->zone() == zone);
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}
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#endif // DEBUG
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uword VMHandles::AllocateHandle(Zone* zone) {
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DEBUG_ASSERT(!IsCurrentApiNativeScope(zone));
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return Handles<kVMHandleSizeInWords, kVMHandlesPerChunk,
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kOffsetOfRawPtr>::AllocateHandle(zone);
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}
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uword VMHandles::AllocateZoneHandle(Zone* zone) {
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DEBUG_ASSERT(!IsCurrentApiNativeScope(zone));
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return Handles<kVMHandleSizeInWords, kVMHandlesPerChunk,
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kOffsetOfRawPtr>::AllocateZoneHandle(zone);
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}
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bool VMHandles::IsZoneHandle(uword handle) {
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return Handles<kVMHandleSizeInWords, kVMHandlesPerChunk,
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kOffsetOfRawPtr>::IsZoneHandle(handle);
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}
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int VMHandles::ScopedHandleCount() {
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Thread* thread = Thread::Current();
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ASSERT(thread->zone() != NULL);
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VMHandles* handles = thread->zone()->handles();
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return handles->CountScopedHandles();
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}
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int VMHandles::ZoneHandleCount() {
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Thread* thread = Thread::Current();
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ASSERT(thread->zone() != NULL);
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VMHandles* handles = thread->zone()->handles();
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return handles->CountZoneHandles();
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}
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void HandleScope::Initialize() {
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ASSERT(thread()->no_handle_scope_depth() == 0);
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VMHandles* handles = thread()->zone()->handles();
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ASSERT(handles != NULL);
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saved_handle_block_ = handles->scoped_blocks_;
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saved_handle_slot_ = handles->scoped_blocks_->next_handle_slot();
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#if defined(DEBUG)
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link_ = thread()->top_handle_scope();
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thread()->set_top_handle_scope(this);
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#endif
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}
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HandleScope::HandleScope(Thread* thread) : StackResource(thread) {
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Initialize();
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}
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HandleScope::~HandleScope() {
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ASSERT(thread()->zone() != NULL);
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VMHandles* handles = thread()->zone()->handles();
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ASSERT(handles != NULL);
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handles->scoped_blocks_ = saved_handle_block_;
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handles->scoped_blocks_->set_next_handle_slot(saved_handle_slot_);
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#if defined(DEBUG)
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handles->VerifyScopedHandleState();
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handles->ZapFreeScopedHandles();
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ASSERT(thread()->top_handle_scope() == this);
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thread()->set_top_handle_scope(link_);
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#endif
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}
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#if defined(DEBUG)
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NoHandleScope::NoHandleScope(Thread* thread) : StackResource(thread) {
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thread->IncrementNoHandleScopeDepth();
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}
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NoHandleScope::~NoHandleScope() {
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thread()->DecrementNoHandleScopeDepth();
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}
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#endif // defined(DEBUG)
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} // namespace dart
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