asiva@google.com
8e27430ddd
- Create a ResuableHandleScope class which ensures that we do not end up recursively reusing handles leading to corruption. This change shows Dart2JSCompileAll runtime change from 739931 to about 645035 on my local machine. R=iposva@google.com Review URL: https://codereview.chromium.org//16174008 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24373 260f80e4-7a28-3924-810f-c04153c831b5
145 lines
3.2 KiB
C++
145 lines
3.2 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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#ifndef VM_BASE_ISOLATE_H_
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#define VM_BASE_ISOLATE_H_
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namespace dart {
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class HandleScope;
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class StackResource;
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class Zone;
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// A BaseIsolate contains just enough functionality to allocate
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// StackResources. This allows us to inline the StackResource
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// constructor/destructor for performance.
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class BaseIsolate {
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public:
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StackResource* top_resource() const { return top_resource_; }
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void set_top_resource(StackResource* value) { top_resource_ = value; }
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Zone* current_zone() const { return current_zone_; }
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void set_current_zone(Zone* zone) { current_zone_ = zone; }
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HandleScope* top_handle_scope() const {
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#if defined(DEBUG)
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return top_handle_scope_;
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#else
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return 0;
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#endif
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}
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void set_top_handle_scope(HandleScope* handle_scope) {
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#if defined(DEBUG)
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top_handle_scope_ = handle_scope;
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#endif
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}
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int32_t no_handle_scope_depth() const {
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#if defined(DEBUG)
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return no_handle_scope_depth_;
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#else
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return 0;
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#endif
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}
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void IncrementNoHandleScopeDepth() {
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#if defined(DEBUG)
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ASSERT(no_handle_scope_depth_ < INT_MAX);
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no_handle_scope_depth_ += 1;
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#endif
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}
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void DecrementNoHandleScopeDepth() {
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#if defined(DEBUG)
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ASSERT(no_handle_scope_depth_ > 0);
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no_handle_scope_depth_ -= 1;
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#endif
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}
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int32_t no_gc_scope_depth() const {
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#if defined(DEBUG)
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return no_gc_scope_depth_;
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#else
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return 0;
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#endif
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}
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void IncrementNoGCScopeDepth() {
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#if defined(DEBUG)
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ASSERT(no_gc_scope_depth_ < INT_MAX);
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no_gc_scope_depth_ += 1;
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#endif
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}
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void DecrementNoGCScopeDepth() {
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#if defined(DEBUG)
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ASSERT(no_gc_scope_depth_ > 0);
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no_gc_scope_depth_ -= 1;
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#endif
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}
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int32_t no_callback_scope_depth() const {
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return no_callback_scope_depth_;
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}
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void IncrementNoCallbackScopeDepth() {
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ASSERT(no_callback_scope_depth_ < INT_MAX);
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no_callback_scope_depth_ += 1;
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}
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void DecrementNoCallbackScopeDepth() {
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ASSERT(no_callback_scope_depth_ > 0);
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no_callback_scope_depth_ -= 1;
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}
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#if defined(DEBUG)
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void set_reusable_handle_scope_active(bool value) {
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reusable_handle_scope_active_ = value;
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}
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bool reusable_handle_scope_active() {
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return reusable_handle_scope_active_;
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}
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#endif
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#if defined(DEBUG)
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static void AssertCurrent(BaseIsolate* isolate);
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#endif
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protected:
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BaseIsolate()
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: top_resource_(NULL),
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current_zone_(NULL),
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#if defined(DEBUG)
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top_handle_scope_(NULL),
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no_handle_scope_depth_(0),
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no_gc_scope_depth_(0),
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reusable_handle_scope_active_(false),
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#endif
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no_callback_scope_depth_(0)
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{}
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~BaseIsolate() {
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// Do not delete stack resources: top_resource_ and current_zone_.
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}
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StackResource* top_resource_;
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Zone* current_zone_;
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#if defined(DEBUG)
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HandleScope* top_handle_scope_;
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int32_t no_handle_scope_depth_;
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int32_t no_gc_scope_depth_;
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bool reusable_handle_scope_active_;
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#endif
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int32_t no_callback_scope_depth_;
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private:
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DISALLOW_COPY_AND_ASSIGN(BaseIsolate);
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};
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} // namespace dart
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#endif // VM_BASE_ISOLATE_H_
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