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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #include "allocation-site-scopes.h" | |
| 29 | |
| 30 namespace v8 { | |
| 31 namespace internal { | |
| 32 | |
| 33 | |
| 34 Handle<AllocationSite> AllocationSiteCreationContext::EnterNewScope() { | |
| 35 Handle<AllocationSite> scope_site; | |
| 36 if (top().is_null()) { | |
| 37 // We are creating the top level AllocationSite as opposed to a nested | |
| 38 // AllocationSite. | |
| 39 InitializeTraversal(isolate()->factory()->NewAllocationSite()); | |
| 40 scope_site = Handle<AllocationSite>(*top(), isolate()); | |
| 41 if (FLAG_trace_creation_allocation_sites) { | |
| 42 PrintF("*** Creating top level AllocationSite %p\n", | |
| 43 static_cast<void*>(*scope_site)); | |
| 44 } | |
| 45 } else { | |
| 46 ASSERT(!current().is_null()); | |
| 47 scope_site = isolate()->factory()->NewAllocationSite(); | |
| 48 if (FLAG_trace_creation_allocation_sites) { | |
| 49 PrintF("Creating nested site (top, current, new) (%p, %p, %p)\n", | |
| 50 static_cast<void*>(*top()), | |
| 51 static_cast<void*>(*current()), | |
| 52 static_cast<void*>(*scope_site)); | |
| 53 } | |
| 54 current()->set_nested_site(*scope_site); | |
| 55 update_current_site(*scope_site); | |
| 56 } | |
| 57 ASSERT(!scope_site.is_null()); | |
| 58 return scope_site; | |
| 59 } | |
| 60 | |
| 61 | |
| 62 void AllocationSiteCreationContext::ExitScope( | |
| 63 Handle<AllocationSite> scope_site, | |
| 64 Handle<JSObject> object) { | |
| 65 if (!object.is_null() && !object->IsFailure()) { | |
| 66 bool top_level = !scope_site.is_null() && | |
| 67 top().is_identical_to(scope_site); | |
| 68 | |
| 69 scope_site->set_transition_info(*object); | |
| 70 if (FLAG_trace_creation_allocation_sites) { | |
| 71 if (top_level) { | |
| 72 PrintF("*** Setting AllocationSite %p transition_info %p\n", | |
| 73 static_cast<void*>(*scope_site), | |
| 74 static_cast<void*>(*object)); | |
| 75 } else { | |
| 76 PrintF("Setting AllocationSite (%p, %p) transition_info %p\n", | |
| 77 static_cast<void*>(*top()), | |
| 78 static_cast<void*>(*scope_site), | |
| 79 static_cast<void*>(*object)); | |
| 80 } | |
| 81 } | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 | |
| 86 Handle<AllocationSite> AllocationSiteUsageContext::EnterNewScope() { | |
| 87 if (top().is_null()) { | |
| 88 InitializeTraversal(top_site_); | |
| 89 } else { | |
| 90 // Advance current site | |
| 91 Object* nested_site = current()->nested_site(); | |
| 92 // Something is wrong if we advance to the end of the list here. | |
| 93 ASSERT(nested_site->IsAllocationSite()); | |
| 94 update_current_site(AllocationSite::cast(nested_site)); | |
| 95 } | |
| 96 return Handle<AllocationSite>(*current(), isolate()); | |
| 97 } | |
| 98 | |
| 99 | |
| 100 void AllocationSiteUsageContext::ExitScope( | |
| 101 Handle<AllocationSite> scope_site, | |
| 102 Handle<JSObject> object) { | |
| 103 // This assert ensures that we are pointing at the right sub-object in a | |
| 104 // recursive walk of a nested literal. | |
| 105 ASSERT(*object == scope_site->transition_info()); | |
| 106 } | |
| 107 | |
| 108 } } // namespace v8::internal | |
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Chromium Code Reviews
Issue 26539010:
Revert "AllocationSites for all literals" (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge