bytecode/StructureStubInfo.cpp

   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::visitAggregate(SlotVisitor& visitor)
  67 {
  68     switch (accessType) {
  69     case access_get_by_id_self:
  70         visitor.append(&u.getByIdSelf.baseObjectStructure);
  71         return;
  72     case access_get_by_id_proto:
  73         visitor.append(&u.getByIdProto.baseObjectStructure);
  74         visitor.append(&u.getByIdProto.prototypeStructure);
  75         return;
  76     case access_get_by_id_chain:
  77         visitor.append(&u.getByIdChain.baseObjectStructure);
  78         visitor.append(&u.getByIdChain.chain);
  79         return;
  80     case access_get_by_id_self_list: {
  81         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
  82         polymorphicStructures->visitAggregate(visitor, u.getByIdSelfList.listSize);
  83         return;
  84     }
  85     case access_get_by_id_proto_list: {
  86         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
  87         polymorphicStructures->visitAggregate(visitor, u.getByIdProtoList.listSize);
  88         return;
  89     }
  90     case access_put_by_id_transition:
  91         visitor.append(&u.putByIdTransition.previousStructure);
  92         visitor.append(&u.putByIdTransition.structure);
  93         visitor.append(&u.putByIdTransition.chain);
  94         return;
  95     case access_put_by_id_replace:
  96         visitor.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