0fc26d8408
R=marja@chromium.org Bug: v8:7965 Change-Id: I596712f55266c245f4df9e2fc7670e518f3e9d52 Reviewed-on: https://chromium-review.googlesource.com/c/1303294 Reviewed-by: Marja Hölttä <marja@chromium.org> Commit-Queue: Clemens Hammacher <clemensh@chromium.org> Cr-Commit-Position: refs/heads/master@{#57060}
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_ALLOCATION_SITE_SCOPES_INL_H_
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#define V8_ALLOCATION_SITE_SCOPES_INL_H_
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#include "src/allocation-site-scopes.h"
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#include "src/objects/allocation-site-inl.h"
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namespace v8 {
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namespace internal {
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void AllocationSiteContext::InitializeTraversal(Handle<AllocationSite> site) {
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top_ = site;
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// {current_} is updated in place to not create unnecessary Handles, hence
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// we initially need a separate handle.
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current_ = Handle<AllocationSite>::New(*top_, isolate());
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}
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Handle<AllocationSite> AllocationSiteUsageContext::EnterNewScope() {
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if (top().is_null()) {
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InitializeTraversal(top_site_);
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} else {
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// Advance current site
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Object* nested_site = current()->nested_site();
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// Something is wrong if we advance to the end of the list here.
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update_current_site(AllocationSite::cast(nested_site));
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}
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return Handle<AllocationSite>(*current(), isolate());
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}
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void AllocationSiteUsageContext::ExitScope(Handle<AllocationSite> scope_site,
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Handle<JSObject> object) {
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// This assert ensures that we are pointing at the right sub-object in a
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// recursive walk of a nested literal.
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DCHECK(object.is_null() || *object == scope_site->boilerplate());
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}
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bool AllocationSiteUsageContext::ShouldCreateMemento(Handle<JSObject> object) {
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if (activated_ && AllocationSite::CanTrack(object->map()->instance_type())) {
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if (FLAG_allocation_site_pretenuring ||
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AllocationSite::ShouldTrack(object->GetElementsKind())) {
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if (FLAG_trace_creation_allocation_sites) {
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PrintF("*** Creating Memento for %s %p\n",
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object->IsJSArray() ? "JSArray" : "JSObject",
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static_cast<void*>(*object));
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}
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return true;
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}
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}
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return false;
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}
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} // namespace internal
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} // namespace v8
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#endif // V8_ALLOCATION_SITE_SCOPES_INL_H_
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