| // 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" |
| #include "src/factory.h" |
| #include "src/isolate.h" |
| #include "src/objects-inl.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()) return; |
| scope_site->set_transition_info(*object); |
| if (FLAG_trace_creation_allocation_sites) { |
| bool top_level = !scope_site.is_null() && top().is_identical_to(scope_site); |
| 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 internal |
| } // namespace v8 |