| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_CODE_STUBS_H_ |
| #define V8_CODE_STUBS_H_ |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Stub is base classes of all stubs. |
| class CodeStub BASE_EMBEDDED { |
| public: |
| enum Major { |
| CallFunction, |
| GenericBinaryOp, |
| SmiOp, |
| Compare, |
| RecordWrite, // Last stub that allows stub calls inside. |
| StackCheck, |
| UnarySub, |
| RevertToNumber, |
| ToBoolean, |
| Instanceof, |
| CounterOp, |
| ArgumentsAccess, |
| Runtime, |
| CEntry, |
| JSEntry, |
| GetProperty, // ARM only |
| SetProperty, // ARM only |
| InvokeBuiltin, // ARM only |
| JSExit, // ARM only |
| NUMBER_OF_IDS |
| }; |
| |
| // Retrieve the code for the stub. Generate the code if needed. |
| Handle<Code> GetCode(); |
| |
| static Major MajorKeyFromKey(uint32_t key) { |
| return static_cast<Major>(MajorKeyBits::decode(key)); |
| }; |
| static int MinorKeyFromKey(uint32_t key) { |
| return MinorKeyBits::decode(key); |
| }; |
| static const char* MajorName(Major major_key); |
| |
| virtual ~CodeStub() {} |
| |
| protected: |
| static const int kMajorBits = 5; |
| static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; |
| |
| private: |
| // Generates the assembler code for the stub. |
| virtual void Generate(MacroAssembler* masm) = 0; |
| |
| // Returns information for computing the number key. |
| virtual Major MajorKey() = 0; |
| virtual int MinorKey() = 0; |
| |
| // The CallFunctionStub needs to override this so it can encode whether a |
| // lazily generated function should be fully optimized or not. |
| virtual InLoopFlag InLoop() { return NOT_IN_LOOP; } |
| |
| // Returns a name for logging/debugging purposes. |
| virtual const char* GetName() { return MajorName(MajorKey()); } |
| |
| #ifdef DEBUG |
| virtual void Print() { PrintF("%s\n", GetName()); } |
| #endif |
| |
| // Computes the key based on major and minor. |
| uint32_t GetKey() { |
| ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS); |
| return MinorKeyBits::encode(MinorKey()) | |
| MajorKeyBits::encode(MajorKey()); |
| } |
| |
| bool AllowsStubCalls() { return MajorKey() <= RecordWrite; } |
| |
| class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; |
| class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; |
| |
| friend class BreakPointIterator; |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_CODE_STUBS_H_ |