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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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 #if V8_TARGET_ARCH_ARM64 | 5 #if V8_TARGET_ARCH_ARM64 |
6 | 6 |
7 #include "src/ic/handler-compiler.h" | 7 #include "src/ic/handler-compiler.h" |
8 | 8 |
9 #include "src/api-arguments.h" | 9 #include "src/api-arguments.h" |
10 #include "src/field-type.h" | 10 #include "src/field-type.h" |
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471 | 471 |
472 // Keep track of the current object in register reg. | 472 // Keep track of the current object in register reg. |
473 Register reg = object_reg; | 473 Register reg = object_reg; |
474 int depth = 0; | 474 int depth = 0; |
475 | 475 |
476 Handle<JSObject> current = Handle<JSObject>::null(); | 476 Handle<JSObject> current = Handle<JSObject>::null(); |
477 if (receiver_map->IsJSGlobalObjectMap()) { | 477 if (receiver_map->IsJSGlobalObjectMap()) { |
478 current = isolate()->global_object(); | 478 current = isolate()->global_object(); |
479 } | 479 } |
480 | 480 |
481 // Check access rights to the global object. This has to happen after | |
482 // the map check so that we know that the object is actually a global | |
483 // object. | |
484 // This allows us to install generated handlers for accesses to the | |
485 // global proxy (as opposed to using slow ICs). See corresponding code | |
486 // in LookupForRead(). | |
487 if (receiver_map->IsJSGlobalProxyMap()) { | |
488 UseScratchRegisterScope temps(masm()); | |
489 __ CheckAccessGlobalProxy(reg, scratch2, temps.AcquireX(), miss); | |
490 } | |
491 | |
492 Handle<JSObject> prototype = Handle<JSObject>::null(); | 481 Handle<JSObject> prototype = Handle<JSObject>::null(); |
493 Handle<Map> current_map = receiver_map; | 482 Handle<Map> current_map = receiver_map; |
494 Handle<Map> holder_map(holder()->map()); | 483 Handle<Map> holder_map(holder()->map()); |
495 // Traverse the prototype chain and check the maps in the prototype chain for | 484 // Traverse the prototype chain and check the maps in the prototype chain for |
496 // fast and global objects or do negative lookup for normal objects. | 485 // fast and global objects or do negative lookup for normal objects. |
497 while (!current_map.is_identical_to(holder_map)) { | 486 while (!current_map.is_identical_to(holder_map)) { |
498 ++depth; | 487 ++depth; |
499 | 488 |
500 // Only global objects and objects that do not require access | |
501 // checks are allowed in stubs. | |
502 DCHECK(current_map->IsJSGlobalProxyMap() || | |
503 !current_map->is_access_check_needed()); | |
504 | |
505 prototype = handle(JSObject::cast(current_map->prototype())); | 489 prototype = handle(JSObject::cast(current_map->prototype())); |
506 if (current_map->IsJSGlobalObjectMap()) { | 490 if (current_map->IsJSGlobalObjectMap()) { |
507 GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), | 491 GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), |
508 name, scratch2, miss); | 492 name, scratch2, miss); |
509 } else if (current_map->is_dictionary_map()) { | 493 } else if (current_map->is_dictionary_map()) { |
510 DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. | 494 DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
511 DCHECK(name->IsUniqueName()); | 495 DCHECK(name->IsUniqueName()); |
512 DCHECK(current.is_null() || (current->property_dictionary()->FindEntry( | 496 DCHECK(current.is_null() || (current->property_dictionary()->FindEntry( |
513 name) == NameDictionary::kNotFound)); | 497 name) == NameDictionary::kNotFound)); |
514 | 498 |
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686 // Return the generated code. | 670 // Return the generated code. |
687 return GetCode(kind(), name); | 671 return GetCode(kind(), name); |
688 } | 672 } |
689 | 673 |
690 | 674 |
691 #undef __ | 675 #undef __ |
692 } // namespace internal | 676 } // namespace internal |
693 } // namespace v8 | 677 } // namespace v8 |
694 | 678 |
695 #endif // V8_TARGET_ARCH_IA32 | 679 #endif // V8_TARGET_ARCH_IA32 |
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