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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OBJECTS_ALLOCATION_SITE_SCOPES_INL_H_
#define V8_OBJECTS_ALLOCATION_SITE_SCOPES_INL_H_
#include "src/objects/allocation-site-scopes.h"
#include "src/objects/allocation-site-inl.h"
namespace v8 {
namespace internal {
void AllocationSiteContext::InitializeTraversal(Handle<AllocationSite> site) {
top_ = site;
// {current_} is updated in place to not create unnecessary Handles, hence
// we initially need a separate handle.
current_ = Handle<AllocationSite>::New(*top_, isolate());
}
Handle<AllocationSite> AllocationSiteUsageContext::EnterNewScope() {
if (top().is_null()) {
InitializeTraversal(top_site_);
} else {
// Advance current site
Object nested_site = current()->nested_site();
// Something is wrong if we advance to the end of the list here.
update_current_site(AllocationSite::cast(nested_site));
}
return Handle<AllocationSite>(*current(), isolate());
}
void AllocationSiteUsageContext::ExitScope(Handle<AllocationSite> scope_site,
Handle<JSObject> object) {
// This assert ensures that we are pointing at the right sub-object in a
// recursive walk of a nested literal.
DCHECK(object.is_null() || *object == scope_site->boilerplate());
}
bool AllocationSiteUsageContext::ShouldCreateMemento(Handle<JSObject> object) {
if (activated_ && AllocationSite::CanTrack(object->map().instance_type())) {
if (FLAG_allocation_site_pretenuring ||
AllocationSite::ShouldTrack(object->GetElementsKind())) {
if (FLAG_trace_creation_allocation_sites) {
PrintF("*** Creating Memento for %s %p\n",
object->IsJSArray() ? "JSArray" : "JSObject",
reinterpret_cast<void*>(object->ptr()));
}
return true;
}
}
return false;
}
} // namespace internal
} // namespace v8
#endif // V8_OBJECTS_ALLOCATION_SITE_SCOPES_INL_H_