Home | History | Annotate | Download | only in bytecode 
      1 /*
      2  * Copyright (C) 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "StructureStubInfo.h"
     28 
     29 #include "JSObject.h"
     30 #include "ScopeChain.h"
     31 
     32 namespace JSC {
     33 
     34 #if ENABLE(JIT)
     35 void StructureStubInfo::deref()
     36 {
     37     switch (accessType) {
     38     case access_get_by_id_self_list: {
     39         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
     40         delete polymorphicStructures;
     41         return;
     42     }
     43     case access_get_by_id_proto_list: {
     44         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
     45         delete polymorphicStructures;
     46         return;
     47     }
     48     case access_get_by_id_self:
     49     case access_get_by_id_proto:
     50     case access_get_by_id_chain:
     51     case access_put_by_id_transition:
     52     case access_put_by_id_replace:
     53     case access_get_by_id:
     54     case access_put_by_id:
     55     case access_get_by_id_generic:
     56     case access_put_by_id_generic:
     57     case access_get_array_length:
     58     case access_get_string_length:
     59         // These instructions don't have to release any allocated memory
     60         return;
     61     default:
     62         ASSERT_NOT_REACHED();
     63     }
     64 }
     65 
     66 void StructureStubInfo::markAggregate(MarkStack& markStack)
     67 {
     68     switch (accessType) {
     69     case access_get_by_id_self:
     70         markStack.append(&u.getByIdSelf.baseObjectStructure);
     71         return;
     72     case access_get_by_id_proto:
     73         markStack.append(&u.getByIdProto.baseObjectStructure);
     74         markStack.append(&u.getByIdProto.prototypeStructure);
     75         return;
     76     case access_get_by_id_chain:
     77         markStack.append(&u.getByIdChain.baseObjectStructure);
     78         markStack.append(&u.getByIdChain.chain);
     79         return;
     80     case access_get_by_id_self_list: {
     81         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
     82         polymorphicStructures->markAggregate(markStack, u.getByIdSelfList.listSize);
     83         return;
     84     }
     85     case access_get_by_id_proto_list: {
     86         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
     87         polymorphicStructures->markAggregate(markStack, u.getByIdProtoList.listSize);
     88         return;
     89     }
     90     case access_put_by_id_transition:
     91         markStack.append(&u.putByIdTransition.previousStructure);
     92         markStack.append(&u.putByIdTransition.structure);
     93         markStack.append(&u.putByIdTransition.chain);
     94         return;
     95     case access_put_by_id_replace:
     96         markStack.append(&u.putByIdReplace.baseObjectStructure);
     97         return;
     98     case access_get_by_id:
     99     case access_put_by_id:
    100     case access_get_by_id_generic:
    101     case access_put_by_id_generic:
    102     case access_get_array_length:
    103     case access_get_string_length:
    104         // These instructions don't need to mark anything
    105         return;
    106     default:
    107         ASSERT_NOT_REACHED();
    108     }
    109 }
    110 #endif
    111 
    112 } // namespace JSC
    113