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// Copyright 2013 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.
#include "src/allocation-site-scopes.h"
namespace v8 {
namespace internal {
Handle<AllocationSite> AllocationSiteCreationContext::EnterNewScope() {
Handle<AllocationSite> scope_site;
if (top().is_null()) {
// We are creating the top level AllocationSite as opposed to a nested
// AllocationSite.
InitializeTraversal(isolate()->factory()->NewAllocationSite());
scope_site = Handle<AllocationSite>(*top(), isolate());
if (FLAG_trace_creation_allocation_sites) {
PrintF("*** Creating top level AllocationSite %p\n",
static_cast<void*>(*scope_site));
}
} else {
DCHECK(!current().is_null());
scope_site = isolate()->factory()->NewAllocationSite();
if (FLAG_trace_creation_allocation_sites) {
PrintF("Creating nested site (top, current, new) (%p, %p, %p)\n",
static_cast<void*>(*top()),
static_cast<void*>(*current()),
static_cast<void*>(*scope_site));
}
current()->set_nested_site(*scope_site);
update_current_site(*scope_site);
}
DCHECK(!scope_site.is_null());
return scope_site;
}
void AllocationSiteCreationContext::ExitScope(
Handle<AllocationSite> scope_site,
Handle<JSObject> object) {
if (!object.is_null()) {
bool top_level = !scope_site.is_null() &&
top().is_identical_to(scope_site);
scope_site->set_transition_info(*object);
if (FLAG_trace_creation_allocation_sites) {
if (top_level) {
PrintF("*** Setting AllocationSite %p transition_info %p\n",
static_cast<void*>(*scope_site),
static_cast<void*>(*object));
} else {
PrintF("Setting AllocationSite (%p, %p) transition_info %p\n",
static_cast<void*>(*top()),
static_cast<void*>(*scope_site),
static_cast<void*>(*object));
}
}
}
}
bool AllocationSiteUsageContext::ShouldCreateMemento(Handle<JSObject> object) {
if (activated_ && AllocationSite::CanTrack(object->map()->instance_type())) {
if (FLAG_allocation_site_pretenuring ||
AllocationSite::GetMode(object->GetElementsKind()) ==
TRACK_ALLOCATION_SITE) {
if (FLAG_trace_creation_allocation_sites) {
PrintF("*** Creating Memento for %s %p\n",
object->IsJSArray() ? "JSArray" : "JSObject",
static_cast<void*>(*object));
}
return true;
}
}
return false;
}
} } // namespace v8::internal
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