Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_CODE_STUBS_H_ |
| 29 | #define V8_CODE_STUBS_H_ |
| 30 | |
| 31 | namespace v8 { |
| 32 | namespace internal { |
| 33 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 34 | // List of code stubs used on all platforms. The order in this list is important |
| 35 | // as only the stubs up to and including RecordWrite allows nested stub calls. |
| 36 | #define CODE_STUB_LIST_ALL_PLATFORMS(V) \ |
| 37 | V(CallFunction) \ |
| 38 | V(GenericBinaryOp) \ |
| 39 | V(StringAdd) \ |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame^] | 40 | V(SubString) \ |
| 41 | V(StringCompare) \ |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 42 | V(SmiOp) \ |
| 43 | V(Compare) \ |
| 44 | V(RecordWrite) \ |
| 45 | V(ConvertToDouble) \ |
| 46 | V(WriteInt32ToHeapNumber) \ |
| 47 | V(StackCheck) \ |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame^] | 48 | V(FastNewClosure) \ |
| 49 | V(FastNewContext) \ |
| 50 | V(FastCloneShallowArray) \ |
| 51 | V(GenericUnaryOp) \ |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 52 | V(RevertToNumber) \ |
| 53 | V(ToBoolean) \ |
| 54 | V(Instanceof) \ |
| 55 | V(CounterOp) \ |
| 56 | V(ArgumentsAccess) \ |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame^] | 57 | V(RegExpExec) \ |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 58 | V(Runtime) \ |
| 59 | V(CEntry) \ |
| 60 | V(JSEntry) |
| 61 | |
| 62 | // List of code stubs only used on ARM platforms. |
| 63 | #ifdef V8_TARGET_ARCH_ARM |
| 64 | #define CODE_STUB_LIST_ARM(V) \ |
| 65 | V(GetProperty) \ |
| 66 | V(SetProperty) \ |
| 67 | V(InvokeBuiltin) \ |
| 68 | V(RegExpCEntry) |
| 69 | #else |
| 70 | #define CODE_STUB_LIST_ARM(V) |
| 71 | #endif |
| 72 | |
| 73 | // Combined list of code stubs. |
| 74 | #define CODE_STUB_LIST(V) \ |
| 75 | CODE_STUB_LIST_ALL_PLATFORMS(V) \ |
| 76 | CODE_STUB_LIST_ARM(V) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 77 | |
| 78 | // Stub is base classes of all stubs. |
| 79 | class CodeStub BASE_EMBEDDED { |
| 80 | public: |
| 81 | enum Major { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 82 | #define DEF_ENUM(name) name, |
| 83 | CODE_STUB_LIST(DEF_ENUM) |
| 84 | #undef DEF_ENUM |
| 85 | NoCache, // marker for stubs that do custom caching |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 86 | NUMBER_OF_IDS |
| 87 | }; |
| 88 | |
| 89 | // Retrieve the code for the stub. Generate the code if needed. |
| 90 | Handle<Code> GetCode(); |
| 91 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame^] | 92 | // Retrieve the code for the stub if already generated. Do not |
| 93 | // generate the code if not already generated and instead return a |
| 94 | // retry after GC Failure object. |
| 95 | Object* TryGetCode(); |
| 96 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 97 | static Major MajorKeyFromKey(uint32_t key) { |
| 98 | return static_cast<Major>(MajorKeyBits::decode(key)); |
| 99 | }; |
| 100 | static int MinorKeyFromKey(uint32_t key) { |
| 101 | return MinorKeyBits::decode(key); |
| 102 | }; |
| 103 | static const char* MajorName(Major major_key); |
| 104 | |
| 105 | virtual ~CodeStub() {} |
| 106 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 107 | // Override these methods to provide a custom caching mechanism for |
| 108 | // an individual type of code stub. |
| 109 | virtual bool GetCustomCache(Code** code_out) { return false; } |
| 110 | virtual void SetCustomCache(Code* value) { } |
| 111 | virtual bool has_custom_cache() { return false; } |
| 112 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 113 | protected: |
| 114 | static const int kMajorBits = 5; |
| 115 | static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; |
| 116 | |
| 117 | private: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame^] | 118 | // Lookup the code in the (possibly custom) cache. |
| 119 | bool FindCodeInCache(Code** code_out); |
| 120 | |
| 121 | // Nonvirtual wrapper around the stub-specific Generate function. Call |
| 122 | // this function to set up the macro assembler and generate the code. |
| 123 | void GenerateCode(MacroAssembler* masm); |
| 124 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 125 | // Generates the assembler code for the stub. |
| 126 | virtual void Generate(MacroAssembler* masm) = 0; |
| 127 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame^] | 128 | // Perform bookkeeping required after code generation when stub code is |
| 129 | // initially generated. |
| 130 | void RecordCodeGeneration(Code* code, MacroAssembler* masm); |
| 131 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 132 | // Returns information for computing the number key. |
| 133 | virtual Major MajorKey() = 0; |
| 134 | virtual int MinorKey() = 0; |
| 135 | |
| 136 | // The CallFunctionStub needs to override this so it can encode whether a |
| 137 | // lazily generated function should be fully optimized or not. |
| 138 | virtual InLoopFlag InLoop() { return NOT_IN_LOOP; } |
| 139 | |
| 140 | // Returns a name for logging/debugging purposes. |
| 141 | virtual const char* GetName() { return MajorName(MajorKey()); } |
| 142 | |
| 143 | #ifdef DEBUG |
| 144 | virtual void Print() { PrintF("%s\n", GetName()); } |
| 145 | #endif |
| 146 | |
| 147 | // Computes the key based on major and minor. |
| 148 | uint32_t GetKey() { |
| 149 | ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS); |
| 150 | return MinorKeyBits::encode(MinorKey()) | |
| 151 | MajorKeyBits::encode(MajorKey()); |
| 152 | } |
| 153 | |
| 154 | bool AllowsStubCalls() { return MajorKey() <= RecordWrite; } |
| 155 | |
| 156 | class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; |
| 157 | class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; |
| 158 | |
| 159 | friend class BreakPointIterator; |
| 160 | }; |
| 161 | |
| 162 | } } // namespace v8::internal |
| 163 | |
| 164 | #endif // V8_CODE_STUBS_H_ |