// Copyright 2006-2009 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. #include "v8.h" #include "ic-inl.h" #include "codegen-inl.h" #include "stub-cache.h" namespace v8 { namespace internal { #define __ ACCESS_MASM(masm) static void ProbeTable(MacroAssembler* masm, Code::Flags flags, StubCache::Table table, Register name, Register offset, Register extra) { ExternalReference key_offset(SCTableReference::keyReference(table)); ExternalReference value_offset(SCTableReference::valueReference(table)); Label miss; if (extra.is_valid()) { // Get the code entry from the cache. __ mov(extra, Operand::StaticArray(offset, times_2, value_offset)); // Check that the key in the entry matches the name. __ cmp(name, Operand::StaticArray(offset, times_2, key_offset)); __ j(not_equal, &miss, not_taken); // Check that the flags match what we're looking for. __ mov(offset, FieldOperand(extra, Code::kFlagsOffset)); __ and_(offset, ~Code::kFlagsNotUsedInLookup); __ cmp(offset, flags); __ j(not_equal, &miss); // Jump to the first instruction in the code stub. __ add(Operand(extra), Immediate(Code::kHeaderSize - kHeapObjectTag)); __ jmp(Operand(extra)); __ bind(&miss); } else { // Save the offset on the stack. __ push(offset); // Check that the key in the entry matches the name. __ cmp(name, Operand::StaticArray(offset, times_2, key_offset)); __ j(not_equal, &miss, not_taken); // Get the code entry from the cache. __ mov(offset, Operand::StaticArray(offset, times_2, value_offset)); // Check that the flags match what we're looking for. __ mov(offset, FieldOperand(offset, Code::kFlagsOffset)); __ and_(offset, ~Code::kFlagsNotUsedInLookup); __ cmp(offset, flags); __ j(not_equal, &miss); // Restore offset and re-load code entry from cache. __ pop(offset); __ mov(offset, Operand::StaticArray(offset, times_2, value_offset)); // Jump to the first instruction in the code stub. __ add(Operand(offset), Immediate(Code::kHeaderSize - kHeapObjectTag)); __ jmp(Operand(offset)); // Pop at miss. __ bind(&miss); __ pop(offset); } } void StubCache::GenerateProbe(MacroAssembler* masm, Code::Flags flags, Register receiver, Register name, Register scratch, Register extra) { Label miss; // Make sure that code is valid. The shifting code relies on the // entry size being 8. ASSERT(sizeof(Entry) == 8); // Make sure the flags does not name a specific type. ASSERT(Code::ExtractTypeFromFlags(flags) == 0); // Make sure that there are no register conflicts. ASSERT(!scratch.is(receiver)); ASSERT(!scratch.is(name)); ASSERT(!extra.is(receiver)); ASSERT(!extra.is(name)); ASSERT(!extra.is(scratch)); // Check that the receiver isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); // Get the map of the receiver and compute the hash. __ mov(scratch, FieldOperand(name, String::kLengthOffset)); __ add(scratch, FieldOperand(receiver, HeapObject::kMapOffset)); __ xor_(scratch, flags); __ and_(scratch, (kPrimaryTableSize - 1) << kHeapObjectTagSize); // Probe the primary table. ProbeTable(masm, flags, kPrimary, name, scratch, extra); // Primary miss: Compute hash for secondary probe. __ mov(scratch, FieldOperand(name, String::kLengthOffset)); __ add(scratch, FieldOperand(receiver, HeapObject::kMapOffset)); __ xor_(scratch, flags); __ and_(scratch, (kPrimaryTableSize - 1) << kHeapObjectTagSize); __ sub(scratch, Operand(name)); __ add(Operand(scratch), Immediate(flags)); __ and_(scratch, (kSecondaryTableSize - 1) << kHeapObjectTagSize); // Probe the secondary table. ProbeTable(masm, flags, kSecondary, name, scratch, extra); // Cache miss: Fall-through and let caller handle the miss by // entering the runtime system. __ bind(&miss); } template static void PushInterceptorArguments(MacroAssembler* masm, Register receiver, Register holder, Pushable name, JSObject* holder_obj) { __ push(receiver); __ push(holder); __ push(name); InterceptorInfo* interceptor = holder_obj->GetNamedInterceptor(); __ mov(receiver, Immediate(Handle(interceptor))); __ push(receiver); __ push(FieldOperand(receiver, InterceptorInfo::kDataOffset)); } void StubCompiler::GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm, int index, Register prototype) { // Load the global or builtins object from the current context. __ mov(prototype, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); // Load the global context from the global or builtins object. __ mov(prototype, FieldOperand(prototype, GlobalObject::kGlobalContextOffset)); // Load the function from the global context. __ mov(prototype, Operand(prototype, Context::SlotOffset(index))); // Load the initial map. The global functions all have initial maps. __ mov(prototype, FieldOperand(prototype, JSFunction::kPrototypeOrInitialMapOffset)); // Load the prototype from the initial map. __ mov(prototype, FieldOperand(prototype, Map::kPrototypeOffset)); } void StubCompiler::GenerateLoadArrayLength(MacroAssembler* masm, Register receiver, Register scratch, Label* miss_label) { // Check that the receiver isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, miss_label, not_taken); // Check that the object is a JS array. __ CmpObjectType(receiver, JS_ARRAY_TYPE, scratch); __ j(not_equal, miss_label, not_taken); // Load length directly from the JS array. __ mov(eax, FieldOperand(receiver, JSArray::kLengthOffset)); __ ret(0); } // Generate code to check if an object is a string. If the object is // a string, the map's instance type is left in the scratch register. static void GenerateStringCheck(MacroAssembler* masm, Register receiver, Register scratch, Label* smi, Label* non_string_object) { // Check that the object isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, smi, not_taken); // Check that the object is a string. __ mov(scratch, FieldOperand(receiver, HeapObject::kMapOffset)); __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); ASSERT(kNotStringTag != 0); __ test(scratch, Immediate(kNotStringTag)); __ j(not_zero, non_string_object, not_taken); } void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm, Register receiver, Register scratch, Label* miss) { Label load_length, check_wrapper; // Check if the object is a string leaving the instance type in the // scratch register. GenerateStringCheck(masm, receiver, scratch, miss, &check_wrapper); // Load length directly from the string. __ bind(&load_length); __ and_(scratch, kStringSizeMask); __ mov(eax, FieldOperand(receiver, String::kLengthOffset)); // ecx is also the receiver. __ lea(ecx, Operand(scratch, String::kLongLengthShift)); __ shr(eax); // ecx is implicit shift register. __ shl(eax, kSmiTagSize); __ ret(0); // Check if the object is a JSValue wrapper. __ bind(&check_wrapper); __ cmp(scratch, JS_VALUE_TYPE); __ j(not_equal, miss, not_taken); // Check if the wrapped value is a string and load the length // directly if it is. __ mov(receiver, FieldOperand(receiver, JSValue::kValueOffset)); GenerateStringCheck(masm, receiver, scratch, miss, miss); __ jmp(&load_length); } void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm, Register receiver, Register scratch1, Register scratch2, Label* miss_label) { __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); __ mov(eax, Operand(scratch1)); __ ret(0); } // Load a fast property out of a holder object (src). In-object properties // are loaded directly otherwise the property is loaded from the properties // fixed array. void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm, Register dst, Register src, JSObject* holder, int index) { // Adjust for the number of properties stored in the holder. index -= holder->map()->inobject_properties(); if (index < 0) { // Get the property straight out of the holder. int offset = holder->map()->instance_size() + (index * kPointerSize); __ mov(dst, FieldOperand(src, offset)); } else { // Calculate the offset into the properties array. int offset = index * kPointerSize + FixedArray::kHeaderSize; __ mov(dst, FieldOperand(src, JSObject::kPropertiesOffset)); __ mov(dst, FieldOperand(dst, offset)); } } template static void CompileCallLoadPropertyWithInterceptor(MacroAssembler* masm, Register receiver, Register holder, Pushable name, JSObject* holder_obj) { PushInterceptorArguments(masm, receiver, holder, name, holder_obj); ExternalReference ref = ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorOnly)); __ mov(eax, Immediate(5)); __ mov(ebx, Immediate(ref)); CEntryStub stub(1); __ CallStub(&stub); } template static void CompileLoadInterceptor(Compiler* compiler, StubCompiler* stub_compiler, MacroAssembler* masm, JSObject* object, JSObject* holder, String* name, LookupResult* lookup, Register receiver, Register scratch1, Register scratch2, Label* miss) { ASSERT(holder->HasNamedInterceptor()); ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined()); // Check that the receiver isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, miss, not_taken); // Check that the maps haven't changed. Register reg = stub_compiler->CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss); if (lookup->IsValid() && lookup->IsCacheable()) { compiler->CompileCacheable(masm, stub_compiler, receiver, reg, scratch1, scratch2, holder, lookup, name, miss); } else { compiler->CompileRegular(masm, receiver, reg, scratch2, holder, miss); } } static void LookupPostInterceptor(JSObject* holder, String* name, LookupResult* lookup) { holder->LocalLookupRealNamedProperty(name, lookup); if (lookup->IsNotFound()) { Object* proto = holder->GetPrototype(); if (proto != Heap::null_value()) { proto->Lookup(name, lookup); } } } class LoadInterceptorCompiler BASE_EMBEDDED { public: explicit LoadInterceptorCompiler(Register name) : name_(name) {} void CompileCacheable(MacroAssembler* masm, StubCompiler* stub_compiler, Register receiver, Register holder, Register scratch1, Register scratch2, JSObject* holder_obj, LookupResult* lookup, String* name, Label* miss_label) { AccessorInfo* callback = 0; bool optimize = false; // So far the most popular follow ups for interceptor loads are FIELD // and CALLBACKS, so inline only them, other cases may be added // later. if (lookup->type() == FIELD) { optimize = true; } else if (lookup->type() == CALLBACKS) { Object* callback_object = lookup->GetCallbackObject(); if (callback_object->IsAccessorInfo()) { callback = AccessorInfo::cast(callback_object); optimize = callback->getter() != NULL; } } if (!optimize) { CompileRegular(masm, receiver, holder, scratch2, holder_obj, miss_label); return; } // Note: starting a frame here makes GC aware of pointers pushed below. __ EnterInternalFrame(); if (lookup->type() == CALLBACKS) { __ push(receiver); } __ push(holder); __ push(name_); CompileCallLoadPropertyWithInterceptor(masm, receiver, holder, name_, holder_obj); Label interceptor_failed; __ cmp(eax, Factory::no_interceptor_result_sentinel()); __ j(equal, &interceptor_failed); __ LeaveInternalFrame(); __ ret(0); __ bind(&interceptor_failed); __ pop(name_); __ pop(holder); if (lookup->type() == CALLBACKS) { __ pop(receiver); } __ LeaveInternalFrame(); if (lookup->type() == FIELD) { holder = stub_compiler->CheckPrototypes(holder_obj, holder, lookup->holder(), scratch1, scratch2, name, miss_label); stub_compiler->GenerateFastPropertyLoad(masm, eax, holder, lookup->holder(), lookup->GetFieldIndex()); __ ret(0); } else { ASSERT(lookup->type() == CALLBACKS); ASSERT(lookup->GetCallbackObject()->IsAccessorInfo()); ASSERT(callback != NULL); ASSERT(callback->getter() != NULL); Label cleanup; __ pop(scratch2); __ push(receiver); __ push(scratch2); holder = stub_compiler->CheckPrototypes(holder_obj, holder, lookup->holder(), scratch1, scratch2, name, &cleanup); __ pop(scratch2); // save old return address __ push(holder); __ mov(holder, Immediate(Handle(callback))); __ push(holder); __ push(FieldOperand(holder, AccessorInfo::kDataOffset)); __ push(name_); __ push(scratch2); // restore old return address ExternalReference ref = ExternalReference(IC_Utility(IC::kLoadCallbackProperty)); __ TailCallRuntime(ref, 5, 1); __ bind(&cleanup); __ pop(scratch1); __ pop(scratch2); __ push(scratch1); } } void CompileRegular(MacroAssembler* masm, Register receiver, Register holder, Register scratch, JSObject* holder_obj, Label* miss_label) { __ pop(scratch); // save old return address PushInterceptorArguments(masm, receiver, holder, name_, holder_obj); __ push(scratch); // restore old return address ExternalReference ref = ExternalReference( IC_Utility(IC::kLoadPropertyWithInterceptorForLoad)); __ TailCallRuntime(ref, 5, 1); } private: Register name_; }; class CallInterceptorCompiler BASE_EMBEDDED { public: explicit CallInterceptorCompiler(const ParameterCount& arguments) : arguments_(arguments), argc_(arguments.immediate()) {} void CompileCacheable(MacroAssembler* masm, StubCompiler* stub_compiler, Register receiver, Register holder, Register scratch1, Register scratch2, JSObject* holder_obj, LookupResult* lookup, String* name, Label* miss_label) { JSFunction* function = 0; bool optimize = false; // So far the most popular case for failed interceptor is // CONSTANT_FUNCTION sitting below. if (lookup->type() == CONSTANT_FUNCTION) { function = lookup->GetConstantFunction(); // JSArray holder is a special case for call constant function // (see the corresponding code). if (function->is_compiled() && !holder_obj->IsJSArray()) { optimize = true; } } if (!optimize) { CompileRegular(masm, receiver, holder, scratch2, holder_obj, miss_label); return; } __ EnterInternalFrame(); __ push(holder); // save the holder CompileCallLoadPropertyWithInterceptor( masm, receiver, holder, // Under EnterInternalFrame this refers to name. Operand(ebp, (argc_ + 3) * kPointerSize), holder_obj); __ pop(receiver); // restore holder __ LeaveInternalFrame(); __ cmp(eax, Factory::no_interceptor_result_sentinel()); Label invoke; __ j(not_equal, &invoke); stub_compiler->CheckPrototypes(holder_obj, receiver, lookup->holder(), scratch1, scratch2, name, miss_label); if (lookup->holder()->IsGlobalObject()) { __ mov(edx, Operand(esp, (argc_ + 1) * kPointerSize)); __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); __ mov(Operand(esp, (argc_ + 1) * kPointerSize), edx); } ASSERT(function->is_compiled()); // Get the function and setup the context. __ mov(edi, Immediate(Handle(function))); __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); // Jump to the cached code (tail call). ASSERT(function->is_compiled()); Handle code(function->code()); ParameterCount expected(function->shared()->formal_parameter_count()); __ InvokeCode(code, expected, arguments_, RelocInfo::CODE_TARGET, JUMP_FUNCTION); __ bind(&invoke); } void CompileRegular(MacroAssembler* masm, Register receiver, Register holder, Register scratch, JSObject* holder_obj, Label* miss_label) { __ EnterInternalFrame(); PushInterceptorArguments(masm, receiver, holder, Operand(ebp, (argc_ + 3) * kPointerSize), holder_obj); ExternalReference ref = ExternalReference( IC_Utility(IC::kLoadPropertyWithInterceptorForCall)); __ mov(eax, Immediate(5)); __ mov(ebx, Immediate(ref)); CEntryStub stub(1); __ CallStub(&stub); __ LeaveInternalFrame(); } private: const ParameterCount& arguments_; int argc_; }; void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) { ASSERT(kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC); Code* code = NULL; if (kind == Code::LOAD_IC) { code = Builtins::builtin(Builtins::LoadIC_Miss); } else { code = Builtins::builtin(Builtins::KeyedLoadIC_Miss); } Handle ic(code); __ jmp(ic, RelocInfo::CODE_TARGET); } void StubCompiler::GenerateStoreField(MacroAssembler* masm, Builtins::Name storage_extend, JSObject* object, int index, Map* transition, Register receiver_reg, Register name_reg, Register scratch, Label* miss_label) { // Check that the object isn't a smi. __ test(receiver_reg, Immediate(kSmiTagMask)); __ j(zero, miss_label, not_taken); // Check that the map of the object hasn't changed. __ cmp(FieldOperand(receiver_reg, HeapObject::kMapOffset), Immediate(Handle(object->map()))); __ j(not_equal, miss_label, not_taken); // Perform global security token check if needed. if (object->IsJSGlobalProxy()) { __ CheckAccessGlobalProxy(receiver_reg, scratch, miss_label); } // Stub never generated for non-global objects that require access // checks. ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); // Perform map transition for the receiver if necessary. if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) { // The properties must be extended before we can store the value. // We jump to a runtime call that extends the properties array. __ mov(ecx, Immediate(Handle(transition))); Handle ic(Builtins::builtin(storage_extend)); __ jmp(ic, RelocInfo::CODE_TARGET); return; } if (transition != NULL) { // Update the map of the object; no write barrier updating is // needed because the map is never in new space. __ mov(FieldOperand(receiver_reg, HeapObject::kMapOffset), Immediate(Handle(transition))); } // Adjust for the number of properties stored in the object. Even in the // face of a transition we can use the old map here because the size of the // object and the number of in-object properties is not going to change. index -= object->map()->inobject_properties(); if (index < 0) { // Set the property straight into the object. int offset = object->map()->instance_size() + (index * kPointerSize); __ mov(FieldOperand(receiver_reg, offset), eax); // Update the write barrier for the array address. // Pass the value being stored in the now unused name_reg. __ mov(name_reg, Operand(eax)); __ RecordWrite(receiver_reg, offset, name_reg, scratch); } else { // Write to the properties array. int offset = index * kPointerSize + FixedArray::kHeaderSize; // Get the properties array (optimistically). __ mov(scratch, FieldOperand(receiver_reg, JSObject::kPropertiesOffset)); __ mov(FieldOperand(scratch, offset), eax); // Update the write barrier for the array address. // Pass the value being stored in the now unused name_reg. __ mov(name_reg, Operand(eax)); __ RecordWrite(scratch, offset, name_reg, receiver_reg); } // Return the value (register eax). __ ret(0); } #undef __ #define __ ACCESS_MASM(masm()) Register StubCompiler::CheckPrototypes(JSObject* object, Register object_reg, JSObject* holder, Register holder_reg, Register scratch, String* name, Label* miss) { // Check that the maps haven't changed. Register result = masm()->CheckMaps(object, object_reg, holder, holder_reg, scratch, miss); // If we've skipped any global objects, it's not enough to verify // that their maps haven't changed. while (object != holder) { if (object->IsGlobalObject()) { GlobalObject* global = GlobalObject::cast(object); Object* probe = global->EnsurePropertyCell(name); if (probe->IsFailure()) { set_failure(Failure::cast(probe)); return result; } JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(probe); ASSERT(cell->value()->IsTheHole()); __ mov(scratch, Immediate(Handle(cell))); __ cmp(FieldOperand(scratch, JSGlobalPropertyCell::kValueOffset), Immediate(Factory::the_hole_value())); __ j(not_equal, miss, not_taken); } object = JSObject::cast(object->GetPrototype()); } // Return the register containin the holder. return result; } void StubCompiler::GenerateLoadField(JSObject* object, JSObject* holder, Register receiver, Register scratch1, Register scratch2, int index, String* name, Label* miss) { // Check that the receiver isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, miss, not_taken); // Check the prototype chain. Register reg = CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss); // Get the value from the properties. GenerateFastPropertyLoad(masm(), eax, reg, holder, index); __ ret(0); } void StubCompiler::GenerateLoadCallback(JSObject* object, JSObject* holder, Register receiver, Register name_reg, Register scratch1, Register scratch2, AccessorInfo* callback, String* name, Label* miss) { // Check that the receiver isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, miss, not_taken); // Check that the maps haven't changed. Register reg = CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss); // Push the arguments on the JS stack of the caller. __ pop(scratch2); // remove return address __ push(receiver); // receiver __ push(reg); // holder __ mov(reg, Immediate(Handle(callback))); // callback data __ push(reg); __ push(FieldOperand(reg, AccessorInfo::kDataOffset)); __ push(name_reg); // name __ push(scratch2); // restore return address // Do tail-call to the runtime system. ExternalReference load_callback_property = ExternalReference(IC_Utility(IC::kLoadCallbackProperty)); __ TailCallRuntime(load_callback_property, 5, 1); } void StubCompiler::GenerateLoadConstant(JSObject* object, JSObject* holder, Register receiver, Register scratch1, Register scratch2, Object* value, String* name, Label* miss) { // Check that the receiver isn't a smi. __ test(receiver, Immediate(kSmiTagMask)); __ j(zero, miss, not_taken); // Check that the maps haven't changed. Register reg = CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss); // Return the constant value. __ mov(eax, Handle(value)); __ ret(0); } void StubCompiler::GenerateLoadInterceptor(JSObject* object, JSObject* holder, LookupResult* lookup, Register receiver, Register name_reg, Register scratch1, Register scratch2, String* name, Label* miss) { LoadInterceptorCompiler compiler(name_reg); CompileLoadInterceptor(&compiler, this, masm(), object, holder, name, lookup, receiver, scratch1, scratch2, miss); } // TODO(1241006): Avoid having lazy compile stubs specialized by the // number of arguments. It is not needed anymore. Object* StubCompiler::CompileLazyCompile(Code::Flags flags) { // Enter an internal frame. __ EnterInternalFrame(); // Push a copy of the function onto the stack. __ push(edi); __ push(edi); // function is also the parameter to the runtime call __ CallRuntime(Runtime::kLazyCompile, 1); __ pop(edi); // Tear down temporary frame. __ LeaveInternalFrame(); // Do a tail-call of the compiled function. __ lea(ecx, FieldOperand(eax, Code::kHeaderSize)); __ jmp(Operand(ecx)); return GetCodeWithFlags(flags, "LazyCompileStub"); } Object* CallStubCompiler::CompileCallField(Object* object, JSObject* holder, int index, String* name) { // ----------- S t a t e ------------- // ----------------------------------- Label miss; // Get the receiver from the stack. const int argc = arguments().immediate(); __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); // Check that the receiver isn't a smi. __ test(edx, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); // Do the right check and compute the holder register. Register reg = CheckPrototypes(JSObject::cast(object), edx, holder, ebx, ecx, name, &miss); GenerateFastPropertyLoad(masm(), edi, reg, holder, index); // Check that the function really is a function. __ test(edi, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); __ CmpObjectType(edi, JS_FUNCTION_TYPE, ebx); __ j(not_equal, &miss, not_taken); // Patch the receiver on the stack with the global proxy if // necessary. if (object->IsGlobalObject()) { __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); __ mov(Operand(esp, (argc + 1) * kPointerSize), edx); } // Invoke the function. __ InvokeFunction(edi, arguments(), JUMP_FUNCTION); // Handle call cache miss. __ bind(&miss); Handle ic = ComputeCallMiss(arguments().immediate()); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(FIELD, name); } Object* CallStubCompiler::CompileCallConstant(Object* object, JSObject* holder, JSFunction* function, String* name, CheckType check) { // ----------- S t a t e ------------- // ----------------------------------- Label miss; // Get the receiver from the stack. const int argc = arguments().immediate(); __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); // Check that the receiver isn't a smi. if (check != NUMBER_CHECK) { __ test(edx, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); } // Make sure that it's okay not to patch the on stack receiver // unless we're doing a receiver map check. ASSERT(!object->IsGlobalObject() || check == RECEIVER_MAP_CHECK); switch (check) { case RECEIVER_MAP_CHECK: // Check that the maps haven't changed. CheckPrototypes(JSObject::cast(object), edx, holder, ebx, ecx, name, &miss); // Patch the receiver on the stack with the global proxy if // necessary. if (object->IsGlobalObject()) { __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); __ mov(Operand(esp, (argc + 1) * kPointerSize), edx); } break; case STRING_CHECK: // Check that the object is a two-byte string or a symbol. __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); __ cmp(ecx, FIRST_NONSTRING_TYPE); __ j(above_equal, &miss, not_taken); // Check that the maps starting from the prototype haven't changed. GenerateLoadGlobalFunctionPrototype(masm(), Context::STRING_FUNCTION_INDEX, ecx); CheckPrototypes(JSObject::cast(object->GetPrototype()), ecx, holder, ebx, edx, name, &miss); break; case NUMBER_CHECK: { Label fast; // Check that the object is a smi or a heap number. __ test(edx, Immediate(kSmiTagMask)); __ j(zero, &fast, taken); __ CmpObjectType(edx, HEAP_NUMBER_TYPE, ecx); __ j(not_equal, &miss, not_taken); __ bind(&fast); // Check that the maps starting from the prototype haven't changed. GenerateLoadGlobalFunctionPrototype(masm(), Context::NUMBER_FUNCTION_INDEX, ecx); CheckPrototypes(JSObject::cast(object->GetPrototype()), ecx, holder, ebx, edx, name, &miss); break; } case BOOLEAN_CHECK: { Label fast; // Check that the object is a boolean. __ cmp(edx, Factory::true_value()); __ j(equal, &fast, taken); __ cmp(edx, Factory::false_value()); __ j(not_equal, &miss, not_taken); __ bind(&fast); // Check that the maps starting from the prototype haven't changed. GenerateLoadGlobalFunctionPrototype(masm(), Context::BOOLEAN_FUNCTION_INDEX, ecx); CheckPrototypes(JSObject::cast(object->GetPrototype()), ecx, holder, ebx, edx, name, &miss); break; } case JSARRAY_HAS_FAST_ELEMENTS_CHECK: CheckPrototypes(JSObject::cast(object), edx, holder, ebx, ecx, name, &miss); // Make sure object->HasFastElements(). // Get the elements array of the object. __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset)); // Check that the object is in fast mode (not dictionary). __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), Immediate(Factory::fixed_array_map())); __ j(not_equal, &miss, not_taken); break; default: UNREACHABLE(); } // Get the function and setup the context. __ mov(edi, Immediate(Handle(function))); __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); // Jump to the cached code (tail call). ASSERT(function->is_compiled()); Handle code(function->code()); ParameterCount expected(function->shared()->formal_parameter_count()); __ InvokeCode(code, expected, arguments(), RelocInfo::CODE_TARGET, JUMP_FUNCTION); // Handle call cache miss. __ bind(&miss); Handle ic = ComputeCallMiss(arguments().immediate()); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. String* function_name = NULL; if (function->shared()->name()->IsString()) { function_name = String::cast(function->shared()->name()); } return GetCode(CONSTANT_FUNCTION, function_name); } Object* CallStubCompiler::CompileCallInterceptor(Object* object, JSObject* holder, String* name) { // ----------- S t a t e ------------- // ----------------------------------- Label miss; // Get the number of arguments. const int argc = arguments().immediate(); LookupResult lookup; LookupPostInterceptor(holder, name, &lookup); // Get the receiver from the stack. __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); CallInterceptorCompiler compiler(arguments()); CompileLoadInterceptor(&compiler, this, masm(), JSObject::cast(object), holder, name, &lookup, edx, ebx, ecx, &miss); // Restore receiver. __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); // Check that the function really is a function. __ test(eax, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx); __ j(not_equal, &miss, not_taken); // Patch the receiver on the stack with the global proxy if // necessary. if (object->IsGlobalObject()) { __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); __ mov(Operand(esp, (argc + 1) * kPointerSize), edx); } // Invoke the function. __ mov(edi, eax); __ InvokeFunction(edi, arguments(), JUMP_FUNCTION); // Handle load cache miss. __ bind(&miss); Handle ic = ComputeCallMiss(argc); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(INTERCEPTOR, name); } Object* CallStubCompiler::CompileCallGlobal(JSObject* object, GlobalObject* holder, JSGlobalPropertyCell* cell, JSFunction* function, String* name) { // ----------- S t a t e ------------- // ----------------------------------- Label miss; // Get the number of arguments. const int argc = arguments().immediate(); // Get the receiver from the stack. __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); // If the object is the holder then we know that it's a global // object which can only happen for contextual calls. In this case, // the receiver cannot be a smi. if (object != holder) { __ test(edx, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); } // Check that the maps haven't changed. CheckPrototypes(object, edx, holder, ebx, ecx, name, &miss); // Get the value from the cell. __ mov(edi, Immediate(Handle(cell))); __ mov(edi, FieldOperand(edi, JSGlobalPropertyCell::kValueOffset)); // Check that the cell contains the same function. __ cmp(Operand(edi), Immediate(Handle(function))); __ j(not_equal, &miss, not_taken); // Patch the receiver on the stack with the global proxy. if (object->IsGlobalObject()) { __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); __ mov(Operand(esp, (argc + 1) * kPointerSize), edx); } // Setup the context (function already in edi). __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); // Jump to the cached code (tail call). __ IncrementCounter(&Counters::call_global_inline, 1); ASSERT(function->is_compiled()); Handle code(function->code()); ParameterCount expected(function->shared()->formal_parameter_count()); __ InvokeCode(code, expected, arguments(), RelocInfo::CODE_TARGET, JUMP_FUNCTION); // Handle call cache miss. __ bind(&miss); __ IncrementCounter(&Counters::call_global_inline_miss, 1); Handle ic = ComputeCallMiss(arguments().immediate()); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(NORMAL, name); } Object* StoreStubCompiler::CompileStoreField(JSObject* object, int index, Map* transition, String* name) { // ----------- S t a t e ------------- // -- eax : value // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; // Get the object from the stack. __ mov(ebx, Operand(esp, 1 * kPointerSize)); // Generate store field code. Trashes the name register. GenerateStoreField(masm(), Builtins::StoreIC_ExtendStorage, object, index, transition, ebx, ecx, edx, &miss); // Handle store cache miss. __ bind(&miss); __ mov(ecx, Immediate(Handle(name))); // restore name Handle ic(Builtins::builtin(Builtins::StoreIC_Miss)); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name); } Object* StoreStubCompiler::CompileStoreCallback(JSObject* object, AccessorInfo* callback, String* name) { // ----------- S t a t e ------------- // -- eax : value // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; // Get the object from the stack. __ mov(ebx, Operand(esp, 1 * kPointerSize)); // Check that the object isn't a smi. __ test(ebx, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); // Check that the map of the object hasn't changed. __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), Immediate(Handle(object->map()))); __ j(not_equal, &miss, not_taken); // Perform global security token check if needed. if (object->IsJSGlobalProxy()) { __ CheckAccessGlobalProxy(ebx, edx, &miss); } // Stub never generated for non-global objects that require access // checks. ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); __ pop(ebx); // remove the return address __ push(Operand(esp, 0)); // receiver __ push(Immediate(Handle(callback))); // callback info __ push(ecx); // name __ push(eax); // value __ push(ebx); // restore return address // Do tail-call to the runtime system. ExternalReference store_callback_property = ExternalReference(IC_Utility(IC::kStoreCallbackProperty)); __ TailCallRuntime(store_callback_property, 4, 1); // Handle store cache miss. __ bind(&miss); __ mov(ecx, Immediate(Handle(name))); // restore name Handle ic(Builtins::builtin(Builtins::StoreIC_Miss)); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(CALLBACKS, name); } Object* StoreStubCompiler::CompileStoreInterceptor(JSObject* receiver, String* name) { // ----------- S t a t e ------------- // -- eax : value // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; // Get the object from the stack. __ mov(ebx, Operand(esp, 1 * kPointerSize)); // Check that the object isn't a smi. __ test(ebx, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); // Check that the map of the object hasn't changed. __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), Immediate(Handle(receiver->map()))); __ j(not_equal, &miss, not_taken); // Perform global security token check if needed. if (receiver->IsJSGlobalProxy()) { __ CheckAccessGlobalProxy(ebx, edx, &miss); } // Stub never generated for non-global objects that require access // checks. ASSERT(receiver->IsJSGlobalProxy() || !receiver->IsAccessCheckNeeded()); __ pop(ebx); // remove the return address __ push(Operand(esp, 0)); // receiver __ push(ecx); // name __ push(eax); // value __ push(ebx); // restore return address // Do tail-call to the runtime system. ExternalReference store_ic_property = ExternalReference(IC_Utility(IC::kStoreInterceptorProperty)); __ TailCallRuntime(store_ic_property, 3, 1); // Handle store cache miss. __ bind(&miss); __ mov(ecx, Immediate(Handle(name))); // restore name Handle ic(Builtins::builtin(Builtins::StoreIC_Miss)); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(INTERCEPTOR, name); } Object* StoreStubCompiler::CompileStoreGlobal(GlobalObject* object, JSGlobalPropertyCell* cell, String* name) { // ----------- S t a t e ------------- // -- eax : value // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; // Check that the map of the global has not changed. __ mov(ebx, Operand(esp, kPointerSize)); __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), Immediate(Handle(object->map()))); __ j(not_equal, &miss, not_taken); // Store the value in the cell. __ mov(ecx, Immediate(Handle(cell))); __ mov(FieldOperand(ecx, JSGlobalPropertyCell::kValueOffset), eax); // Return the value (register eax). __ IncrementCounter(&Counters::named_store_global_inline, 1); __ ret(0); // Handle store cache miss. __ bind(&miss); __ IncrementCounter(&Counters::named_store_global_inline_miss, 1); Handle ic(Builtins::builtin(Builtins::StoreIC_Miss)); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(NORMAL, name); } Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object, int index, Map* transition, String* name) { // ----------- S t a t e ------------- // -- eax : value // -- esp[0] : return address // -- esp[4] : key // -- esp[8] : receiver // ----------------------------------- Label miss; __ IncrementCounter(&Counters::keyed_store_field, 1); // Get the name from the stack. __ mov(ecx, Operand(esp, 1 * kPointerSize)); // Check that the name has not changed. __ cmp(Operand(ecx), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); // Get the object from the stack. __ mov(ebx, Operand(esp, 2 * kPointerSize)); // Generate store field code. Trashes the name register. GenerateStoreField(masm(), Builtins::KeyedStoreIC_ExtendStorage, object, index, transition, ebx, ecx, edx, &miss); // Handle store cache miss. __ bind(&miss); __ DecrementCounter(&Counters::keyed_store_field, 1); Handle ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss)); __ jmp(ic, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name); } Object* LoadStubCompiler::CompileLoadField(JSObject* object, JSObject* holder, int index, String* name) { // ----------- S t a t e ------------- // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); GenerateLoadField(object, holder, eax, ebx, edx, index, name, &miss); __ bind(&miss); GenerateLoadMiss(masm(), Code::LOAD_IC); // Return the generated code. return GetCode(FIELD, name); } Object* LoadStubCompiler::CompileLoadCallback(JSObject* object, JSObject* holder, AccessorInfo* callback, String* name) { // ----------- S t a t e ------------- // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); GenerateLoadCallback(object, holder, eax, ecx, ebx, edx, callback, name, &miss); __ bind(&miss); GenerateLoadMiss(masm(), Code::LOAD_IC); // Return the generated code. return GetCode(CALLBACKS, name); } Object* LoadStubCompiler::CompileLoadConstant(JSObject* object, JSObject* holder, Object* value, String* name) { // ----------- S t a t e ------------- // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); GenerateLoadConstant(object, holder, eax, ebx, edx, value, name, &miss); __ bind(&miss); GenerateLoadMiss(masm(), Code::LOAD_IC); // Return the generated code. return GetCode(CONSTANT_FUNCTION, name); } Object* LoadStubCompiler::CompileLoadInterceptor(JSObject* receiver, JSObject* holder, String* name) { // ----------- S t a t e ------------- // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; LookupResult lookup; LookupPostInterceptor(holder, name, &lookup); __ mov(eax, Operand(esp, kPointerSize)); // TODO(368): Compile in the whole chain: all the interceptors in // prototypes and ultimate answer. GenerateLoadInterceptor(receiver, holder, &lookup, eax, ecx, edx, ebx, name, &miss); __ bind(&miss); GenerateLoadMiss(masm(), Code::LOAD_IC); // Return the generated code. return GetCode(INTERCEPTOR, name); } Object* LoadStubCompiler::CompileLoadGlobal(JSObject* object, GlobalObject* holder, JSGlobalPropertyCell* cell, String* name, bool is_dont_delete) { // ----------- S t a t e ------------- // -- ecx : name // -- esp[0] : return address // -- esp[4] : receiver // ----------------------------------- Label miss; // Get the receiver from the stack. __ mov(eax, Operand(esp, kPointerSize)); // If the object is the holder then we know that it's a global // object which can only happen for contextual loads. In this case, // the receiver cannot be a smi. if (object != holder) { __ test(eax, Immediate(kSmiTagMask)); __ j(zero, &miss, not_taken); } // Check that the maps haven't changed. CheckPrototypes(object, eax, holder, ebx, edx, name, &miss); // Get the value from the cell. __ mov(eax, Immediate(Handle(cell))); __ mov(eax, FieldOperand(eax, JSGlobalPropertyCell::kValueOffset)); // Check for deleted property if property can actually be deleted. if (!is_dont_delete) { __ cmp(eax, Factory::the_hole_value()); __ j(equal, &miss, not_taken); } else if (FLAG_debug_code) { __ cmp(eax, Factory::the_hole_value()); __ Check(not_equal, "DontDelete cells can't contain the hole"); } __ IncrementCounter(&Counters::named_load_global_inline, 1); __ ret(0); __ bind(&miss); __ IncrementCounter(&Counters::named_load_global_inline_miss, 1); GenerateLoadMiss(masm(), Code::LOAD_IC); // Return the generated code. return GetCode(NORMAL, name); } Object* KeyedLoadStubCompiler::CompileLoadField(String* name, JSObject* receiver, JSObject* holder, int index) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_field, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); GenerateLoadField(receiver, holder, ecx, ebx, edx, index, name, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_field, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(FIELD, name); } Object* KeyedLoadStubCompiler::CompileLoadCallback(String* name, JSObject* receiver, JSObject* holder, AccessorInfo* callback) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_callback, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); GenerateLoadCallback(receiver, holder, ecx, eax, ebx, edx, callback, name, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_callback, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(CALLBACKS, name); } Object* KeyedLoadStubCompiler::CompileLoadConstant(String* name, JSObject* receiver, JSObject* holder, Object* value) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_constant_function, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); GenerateLoadConstant(receiver, holder, ecx, ebx, edx, value, name, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_constant_function, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(CONSTANT_FUNCTION, name); } Object* KeyedLoadStubCompiler::CompileLoadInterceptor(JSObject* receiver, JSObject* holder, String* name) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_interceptor, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); LookupResult lookup; LookupPostInterceptor(holder, name, &lookup); GenerateLoadInterceptor(receiver, holder, &lookup, ecx, eax, edx, ebx, name, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_interceptor, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(INTERCEPTOR, name); } Object* KeyedLoadStubCompiler::CompileLoadArrayLength(String* name) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_array_length, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); GenerateLoadArrayLength(masm(), ecx, edx, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_array_length, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(CALLBACKS, name); } Object* KeyedLoadStubCompiler::CompileLoadStringLength(String* name) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_string_length, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); GenerateLoadStringLength(masm(), ecx, edx, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_string_length, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(CALLBACKS, name); } Object* KeyedLoadStubCompiler::CompileLoadFunctionPrototype(String* name) { // ----------- S t a t e ------------- // -- esp[0] : return address // -- esp[4] : name // -- esp[8] : receiver // ----------------------------------- Label miss; __ mov(eax, Operand(esp, kPointerSize)); __ mov(ecx, Operand(esp, 2 * kPointerSize)); __ IncrementCounter(&Counters::keyed_load_function_prototype, 1); // Check that the name has not changed. __ cmp(Operand(eax), Immediate(Handle(name))); __ j(not_equal, &miss, not_taken); GenerateLoadFunctionPrototype(masm(), ecx, edx, ebx, &miss); __ bind(&miss); __ DecrementCounter(&Counters::keyed_load_function_prototype, 1); GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC); // Return the generated code. return GetCode(CALLBACKS, name); } // Specialized stub for constructing objects from functions which only have only // simple assignments of the form this.x = ...; in their body. Object* ConstructStubCompiler::CompileConstructStub( SharedFunctionInfo* shared) { // ----------- S t a t e ------------- // -- eax : argc // -- edi : constructor // -- esp[0] : return address // -- esp[4] : last argument // ----------------------------------- Label generic_stub_call; #ifdef ENABLE_DEBUGGER_SUPPORT // Check to see whether there are any break points in the function code. If // there are jump to the generic constructor stub which calls the actual // code for the function thereby hitting the break points. __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); __ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kDebugInfoOffset)); __ cmp(ebx, Factory::undefined_value()); __ j(not_equal, &generic_stub_call, not_taken); #endif // Load the initial map and verify that it is in fact a map. __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); // Will both indicate a NULL and a Smi. __ test(ebx, Immediate(kSmiTagMask)); __ j(zero, &generic_stub_call); __ CmpObjectType(ebx, MAP_TYPE, ecx); __ j(not_equal, &generic_stub_call); #ifdef DEBUG // Cannot construct functions this way. // edi: constructor // ebx: initial map __ CmpInstanceType(ebx, JS_FUNCTION_TYPE); __ Assert(not_equal, "Function constructed by construct stub."); #endif // Now allocate the JSObject on the heap by moving the new space allocation // top forward. // edi: constructor // ebx: initial map __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset)); __ shl(ecx, kPointerSizeLog2); __ AllocateObjectInNewSpace(ecx, edx, ecx, no_reg, &generic_stub_call, NO_ALLOCATION_FLAGS); // Allocated the JSObject, now initialize the fields and add the heap tag. // ebx: initial map // edx: JSObject (untagged) __ mov(Operand(edx, JSObject::kMapOffset), ebx); __ mov(ebx, Factory::empty_fixed_array()); __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx); __ mov(Operand(edx, JSObject::kElementsOffset), ebx); // Push the allocated object to the stack. This is the object that will be // returned (after it is tagged). __ push(edx); // eax: argc // edx: JSObject (untagged) // Load the address of the first in-object property into edx. __ lea(edx, Operand(edx, JSObject::kHeaderSize)); // Calculate the location of the first argument. The stack contains the // allocated object and the return address on top of the argc arguments. __ lea(ecx, Operand(esp, eax, times_4, 1 * kPointerSize)); // Use edi for holding undefined which is used in several places below. __ mov(edi, Factory::undefined_value()); // eax: argc // ecx: first argument // edx: first in-object property of the JSObject // edi: undefined // Fill the initialized properties with a constant value or a passed argument // depending on the this.x = ...; assignment in the function. for (int i = 0; i < shared->this_property_assignments_count(); i++) { if (shared->IsThisPropertyAssignmentArgument(i)) { Label not_passed; // Set the property to undefined. __ mov(Operand(edx, i * kPointerSize), edi); // Check if the argument assigned to the property is actually passed. int arg_number = shared->GetThisPropertyAssignmentArgument(i); __ cmp(eax, arg_number); __ j(below_equal, ¬_passed); // Argument passed - find it on the stack. __ mov(ebx, Operand(ecx, arg_number * -kPointerSize)); __ mov(Operand(edx, i * kPointerSize), ebx); __ bind(¬_passed); } else { // Set the property to the constant value. Handle constant(shared->GetThisPropertyAssignmentConstant(i)); __ mov(Operand(edx, i * kPointerSize), Immediate(constant)); } } // Fill the unused in-object property fields with undefined. for (int i = shared->this_property_assignments_count(); i < shared->CalculateInObjectProperties(); i++) { __ mov(Operand(edx, i * kPointerSize), edi); } // Move argc to ebx and retrieve and tag the JSObject to return. __ mov(ebx, eax); __ pop(eax); __ or_(Operand(eax), Immediate(kHeapObjectTag)); // Remove caller arguments and receiver from the stack and return. __ pop(ecx); __ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize)); __ push(ecx); __ IncrementCounter(&Counters::constructed_objects, 1); __ IncrementCounter(&Counters::constructed_objects_stub, 1); __ ret(0); // Jump to the generic stub in case the specialized code cannot handle the // construction. __ bind(&generic_stub_call); Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric); Handle generic_construct_stub(code); __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET); // Return the generated code. return GetCode(); } #undef __ } } // namespace v8::internal