| Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/allocation-site-scopes.h" |
| 6 | |
| 7 | namespace v8 { |
| 8 | namespace internal { |
| 9 | |
| 10 | |
| 11 | Handle<AllocationSite> AllocationSiteCreationContext::EnterNewScope() { |
| 12 | Handle<AllocationSite> scope_site; |
| 13 | if (top().is_null()) { |
| 14 | // We are creating the top level AllocationSite as opposed to a nested |
| 15 | // AllocationSite. |
| 16 | InitializeTraversal(isolate()->factory()->NewAllocationSite()); |
| 17 | scope_site = Handle<AllocationSite>(*top(), isolate()); |
| 18 | if (FLAG_trace_creation_allocation_sites) { |
| 19 | PrintF("*** Creating top level AllocationSite %p\n", |
| 20 | static_cast<void*>(*scope_site)); |
| 21 | } |
| 22 | } else { |
| 23 | DCHECK(!current().is_null()); |
| 24 | scope_site = isolate()->factory()->NewAllocationSite(); |
| 25 | if (FLAG_trace_creation_allocation_sites) { |
| 26 | PrintF("Creating nested site (top, current, new) (%p, %p, %p)\n", |
| 27 | static_cast<void*>(*top()), |
| 28 | static_cast<void*>(*current()), |
| 29 | static_cast<void*>(*scope_site)); |
| 30 | } |
| 31 | current()->set_nested_site(*scope_site); |
| 32 | update_current_site(*scope_site); |
| 33 | } |
| 34 | DCHECK(!scope_site.is_null()); |
| 35 | return scope_site; |
| 36 | } |
| 37 | |
| 38 | |
| 39 | void AllocationSiteCreationContext::ExitScope( |
| 40 | Handle<AllocationSite> scope_site, |
| 41 | Handle<JSObject> object) { |
| 42 | if (!object.is_null()) { |
| 43 | bool top_level = !scope_site.is_null() && |
| 44 | top().is_identical_to(scope_site); |
| 45 | |
| 46 | scope_site->set_transition_info(*object); |
| 47 | if (FLAG_trace_creation_allocation_sites) { |
| 48 | if (top_level) { |
| 49 | PrintF("*** Setting AllocationSite %p transition_info %p\n", |
| 50 | static_cast<void*>(*scope_site), |
| 51 | static_cast<void*>(*object)); |
| 52 | } else { |
| 53 | PrintF("Setting AllocationSite (%p, %p) transition_info %p\n", |
| 54 | static_cast<void*>(*top()), |
| 55 | static_cast<void*>(*scope_site), |
| 56 | static_cast<void*>(*object)); |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | |
| 63 | bool AllocationSiteUsageContext::ShouldCreateMemento(Handle<JSObject> object) { |
| 64 | if (activated_ && AllocationSite::CanTrack(object->map()->instance_type())) { |
| 65 | if (FLAG_allocation_site_pretenuring || |
| 66 | AllocationSite::GetMode(object->GetElementsKind()) == |
| 67 | TRACK_ALLOCATION_SITE) { |
| 68 | if (FLAG_trace_creation_allocation_sites) { |
| 69 | PrintF("*** Creating Memento for %s %p\n", |
| 70 | object->IsJSArray() ? "JSArray" : "JSObject", |
| 71 | static_cast<void*>(*object)); |
| 72 | } |
| 73 | return true; |
| 74 | } |
| 75 | } |
| 76 | return false; |
| 77 | } |
| 78 | |
| Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 79 | } // namespace internal |
| 80 | } // namespace v8 |