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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without | 
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are | 
| 4 // met: | 4 // met: | 
| 5 // | 5 // | 
| 6 //     * Redistributions of source code must retain the above copyright | 6 //     * Redistributions of source code must retain the above copyright | 
| 7 //       notice, this list of conditions and the following disclaimer. | 7 //       notice, this list of conditions and the following disclaimer. | 
| 8 //     * Redistributions in binary form must reproduce the above | 8 //     * Redistributions in binary form must reproduce the above | 
| 9 //       copyright notice, this list of conditions and the following | 9 //       copyright notice, this list of conditions and the following | 
| 10 //       disclaimer in the documentation and/or other materials provided | 10 //       disclaimer in the documentation and/or other materials provided | 
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| 29 | 29 | 
| 30 #include "bootstrapper.h" | 30 #include "bootstrapper.h" | 
| 31 #include "code-stubs.h" | 31 #include "code-stubs.h" | 
| 32 #include "factory.h" | 32 #include "factory.h" | 
| 33 #include "macro-assembler.h" | 33 #include "macro-assembler.h" | 
| 34 | 34 | 
| 35 namespace v8 { | 35 namespace v8 { | 
| 36 namespace internal { | 36 namespace internal { | 
| 37 | 37 | 
| 38 Handle<Code> CodeStub::GetCode() { | 38 Handle<Code> CodeStub::GetCode() { | 
| 39   bool custom_cache = has_custom_cache(); | 39   uint32_t key = GetKey(); | 
| 40 | 40   int index = Heap::code_stubs()->FindEntry(key); | 
| 41   int index = 0; | 41   if (index == NumberDictionary::kNotFound) { | 
| 42   uint32_t key = 0; | 42     HandleScope scope; | 
| 43   if (custom_cache) { |  | 
| 44     Code* cached; |  | 
| 45     if (GetCustomCache(&cached)) { |  | 
| 46       return Handle<Code>(cached); |  | 
| 47     } else { |  | 
| 48       index = NumberDictionary::kNotFound; |  | 
| 49     } |  | 
| 50   } else { |  | 
| 51     key = GetKey(); |  | 
| 52     index = Heap::code_stubs()->FindEntry(key); |  | 
| 53     if (index != NumberDictionary::kNotFound) |  | 
| 54       return Handle<Code>(Code::cast(Heap::code_stubs()->ValueAt(index))); |  | 
| 55   } |  | 
| 56 |  | 
| 57   Code* result; |  | 
| 58   { |  | 
| 59     v8::HandleScope scope; |  | 
| 60 | 43 | 
| 61     // Update the static counter each time a new code stub is generated. | 44     // Update the static counter each time a new code stub is generated. | 
| 62     Counters::code_stubs.Increment(); | 45     Counters::code_stubs.Increment(); | 
| 63 | 46 | 
| 64     // Generate the new code. | 47     // Generate the new code. | 
| 65     MacroAssembler masm(NULL, 256); | 48     MacroAssembler masm(NULL, 256); | 
| 66 | 49 | 
| 67     // Nested stubs are not allowed for leafs. | 50     // Nested stubs are not allowed for leafs. | 
| 68     masm.set_allow_stub_calls(AllowsStubCalls()); | 51     masm.set_allow_stub_calls(AllowsStubCalls()); | 
| 69 | 52 | 
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| 89 #ifdef ENABLE_DISASSEMBLER | 72 #ifdef ENABLE_DISASSEMBLER | 
| 90     if (FLAG_print_code_stubs) { | 73     if (FLAG_print_code_stubs) { | 
| 91 #ifdef DEBUG | 74 #ifdef DEBUG | 
| 92       Print(); | 75       Print(); | 
| 93 #endif | 76 #endif | 
| 94       code->Disassemble(GetName()); | 77       code->Disassemble(GetName()); | 
| 95       PrintF("\n"); | 78       PrintF("\n"); | 
| 96     } | 79     } | 
| 97 #endif | 80 #endif | 
| 98 | 81 | 
| 99     if (custom_cache) { | 82     // Update the dictionary and the root in Heap. | 
| 100       SetCustomCache(*code); | 83     Handle<NumberDictionary> dict = | 
| 101     } else { | 84         Factory::DictionaryAtNumberPut( | 
| 102       // Update the dictionary and the root in Heap. | 85             Handle<NumberDictionary>(Heap::code_stubs()), | 
| 103       Handle<NumberDictionary> dict = | 86             key, | 
| 104           Factory::DictionaryAtNumberPut( | 87             code); | 
| 105               Handle<NumberDictionary>(Heap::code_stubs()), | 88     Heap::public_set_code_stubs(*dict); | 
| 106               key, | 89     index = Heap::code_stubs()->FindEntry(key); | 
| 107               code); |  | 
| 108       Heap::public_set_code_stubs(*dict); |  | 
| 109     } |  | 
| 110     result = *code; |  | 
| 111   } | 90   } | 
|  | 91   ASSERT(index != NumberDictionary::kNotFound); | 
| 112 | 92 | 
| 113   return Handle<Code>(result); | 93   return Handle<Code>(Code::cast(Heap::code_stubs()->ValueAt(index))); | 
| 114 } | 94 } | 
| 115 | 95 | 
| 116 | 96 | 
| 117 const char* CodeStub::MajorName(CodeStub::Major major_key) { | 97 const char* CodeStub::MajorName(CodeStub::Major major_key) { | 
| 118   switch (major_key) { | 98   switch (major_key) { | 
| 119 #define DEF_CASE(name) case name: return #name; | 99 #define DEF_CASE(name) case name: return #name; | 
| 120     CODE_STUB_LIST_ALL(DEF_CASE) | 100     CODE_STUB_LIST_ALL(DEF_CASE) | 
| 121 #undef DEF_CASE | 101 #undef DEF_CASE | 
| 122     default: | 102     default: | 
| 123       UNREACHABLE(); | 103       UNREACHABLE(); | 
| 124       return NULL; | 104       return NULL; | 
| 125   } | 105   } | 
| 126 } | 106 } | 
| 127 | 107 | 
| 128 | 108 | 
| 129 } }  // namespace v8::internal | 109 } }  // namespace v8::internal | 
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