| // 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 { |
| |
| // List of code stubs used on all platforms. The order in this list is important |
| // as only the stubs up to and including RecordWrite allows nested stub calls. |
| #define CODE_STUB_LIST_ALL_PLATFORMS(V) \ |
| V(CallFunction) \ |
| V(GenericBinaryOp) \ |
| V(StringAdd) \ |
| V(SubString) \ |
| V(StringCompare) \ |
| V(SmiOp) \ |
| V(Compare) \ |
| V(RecordWrite) \ |
| V(ConvertToDouble) \ |
| V(WriteInt32ToHeapNumber) \ |
| V(StackCheck) \ |
| V(FastNewClosure) \ |
| V(FastNewContext) \ |
| V(FastCloneShallowArray) \ |
| V(GenericUnaryOp) \ |
| V(RevertToNumber) \ |
| V(ToBoolean) \ |
| V(Instanceof) \ |
| V(CounterOp) \ |
| V(ArgumentsAccess) \ |
| V(RegExpExec) \ |
| V(NumberToString) \ |
| V(CEntry) \ |
| V(JSEntry) \ |
| V(DebuggerStatement) |
| |
| // List of code stubs only used on ARM platforms. |
| #ifdef V8_TARGET_ARCH_ARM |
| #define CODE_STUB_LIST_ARM(V) \ |
| V(GetProperty) \ |
| V(SetProperty) \ |
| V(InvokeBuiltin) \ |
| V(RegExpCEntry) |
| #else |
| #define CODE_STUB_LIST_ARM(V) |
| #endif |
| |
| // Combined list of code stubs. |
| #define CODE_STUB_LIST(V) \ |
| CODE_STUB_LIST_ALL_PLATFORMS(V) \ |
| CODE_STUB_LIST_ARM(V) |
| |
| // Stub is base classes of all stubs. |
| class CodeStub BASE_EMBEDDED { |
| public: |
| enum Major { |
| #define DEF_ENUM(name) name, |
| CODE_STUB_LIST(DEF_ENUM) |
| #undef DEF_ENUM |
| NoCache, // marker for stubs that do custom caching |
| NUMBER_OF_IDS |
| }; |
| |
| // Retrieve the code for the stub. Generate the code if needed. |
| Handle<Code> GetCode(); |
| |
| // Retrieve the code for the stub if already generated. Do not |
| // generate the code if not already generated and instead return a |
| // retry after GC Failure object. |
| Object* TryGetCode(); |
| |
| 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, bool allow_unknown_keys); |
| |
| virtual ~CodeStub() {} |
| |
| // Override these methods to provide a custom caching mechanism for |
| // an individual type of code stub. |
| virtual bool GetCustomCache(Code** code_out) { return false; } |
| virtual void SetCustomCache(Code* value) { } |
| virtual bool has_custom_cache() { return false; } |
| |
| protected: |
| static const int kMajorBits = 5; |
| static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; |
| |
| private: |
| // Lookup the code in the (possibly custom) cache. |
| bool FindCodeInCache(Code** code_out); |
| |
| // Nonvirtual wrapper around the stub-specific Generate function. Call |
| // this function to set up the macro assembler and generate the code. |
| void GenerateCode(MacroAssembler* masm); |
| |
| // Generates the assembler code for the stub. |
| virtual void Generate(MacroAssembler* masm) = 0; |
| |
| // Perform bookkeeping required after code generation when stub code is |
| // initially generated. |
| void RecordCodeGeneration(Code* code, MacroAssembler* masm); |
| |
| // 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(), false); } |
| |
| #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_ |