OLD | NEW |
1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #include "src/ast.h" | 7 #include "src/ast.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/compiler.h" | 9 #include "src/compiler.h" |
10 #include "src/ic/ic.h" | 10 #include "src/ic/ic.h" |
(...skipping 44 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
55 if (!obj->IsJSFunction() || | 55 if (!obj->IsJSFunction() || |
56 !CanRetainOtherContext(JSFunction::cast(obj), *native_context_)) { | 56 !CanRetainOtherContext(JSFunction::cast(obj), *native_context_)) { |
57 return Handle<Object>(obj, isolate()); | 57 return Handle<Object>(obj, isolate()); |
58 } | 58 } |
59 return Handle<Object>::cast(isolate()->factory()->undefined_value()); | 59 return Handle<Object>::cast(isolate()->factory()->undefined_value()); |
60 } | 60 } |
61 | 61 |
62 | 62 |
63 Handle<Object> TypeFeedbackOracle::GetInfo(FeedbackVectorICSlot slot) { | 63 Handle<Object> TypeFeedbackOracle::GetInfo(FeedbackVectorICSlot slot) { |
64 DCHECK(slot.ToInt() >= 0 && slot.ToInt() < feedback_vector_->length()); | 64 DCHECK(slot.ToInt() >= 0 && slot.ToInt() < feedback_vector_->length()); |
| 65 Handle<Object> undefined = |
| 66 Handle<Object>::cast(isolate()->factory()->undefined_value()); |
65 Object* obj = feedback_vector_->Get(slot); | 67 Object* obj = feedback_vector_->Get(slot); |
| 68 |
| 69 // Vector-based ICs do not embed direct pointers to maps, functions. |
| 70 // Instead a WeakCell is always used. |
| 71 if (obj->IsWeakCell()) { |
| 72 WeakCell* cell = WeakCell::cast(obj); |
| 73 if (cell->cleared()) return undefined; |
| 74 obj = cell->value(); |
| 75 } |
| 76 |
66 if (!obj->IsJSFunction() || | 77 if (!obj->IsJSFunction() || |
67 !CanRetainOtherContext(JSFunction::cast(obj), *native_context_)) { | 78 !CanRetainOtherContext(JSFunction::cast(obj), *native_context_)) { |
68 return Handle<Object>(obj, isolate()); | 79 return Handle<Object>(obj, isolate()); |
69 } | 80 } |
70 return Handle<Object>::cast(isolate()->factory()->undefined_value()); | 81 return undefined; |
71 } | 82 } |
72 | 83 |
73 | 84 |
74 bool TypeFeedbackOracle::LoadIsUninitialized(TypeFeedbackId id) { | 85 bool TypeFeedbackOracle::LoadIsUninitialized(TypeFeedbackId id) { |
75 Handle<Object> maybe_code = GetInfo(id); | 86 Handle<Object> maybe_code = GetInfo(id); |
76 if (maybe_code->IsCode()) { | 87 if (maybe_code->IsCode()) { |
77 Handle<Code> code = Handle<Code>::cast(maybe_code); | 88 Handle<Code> code = Handle<Code>::cast(maybe_code); |
78 return code->is_inline_cache_stub() && code->ic_state() == UNINITIALIZED; | 89 return code->is_inline_cache_stub() && code->ic_state() == UNINITIALIZED; |
79 } | 90 } |
80 return false; | 91 return false; |
(...skipping 470 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
551 UnseededNumberDictionary::kNotFound); | 562 UnseededNumberDictionary::kNotFound); |
552 // Dictionary has been allocated with sufficient size for all elements. | 563 // Dictionary has been allocated with sufficient size for all elements. |
553 DisallowHeapAllocation no_need_to_resize_dictionary; | 564 DisallowHeapAllocation no_need_to_resize_dictionary; |
554 HandleScope scope(isolate()); | 565 HandleScope scope(isolate()); |
555 USE(UnseededNumberDictionary::AtNumberPut( | 566 USE(UnseededNumberDictionary::AtNumberPut( |
556 dictionary_, IdToKey(ast_id), handle(target, isolate()))); | 567 dictionary_, IdToKey(ast_id), handle(target, isolate()))); |
557 } | 568 } |
558 | 569 |
559 | 570 |
560 } } // namespace v8::internal | 571 } } // namespace v8::internal |
OLD | NEW |