| // Copyright 2012 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" |
| |
| #if V8_TARGET_ARCH_X64 |
| |
| #include "codegen.h" |
| #include "deoptimizer.h" |
| #include "full-codegen.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void Builtins::Generate_Adaptor(MacroAssembler* masm, |
| CFunctionId id, |
| BuiltinExtraArguments extra_args) { |
| // ----------- S t a t e ------------- |
| // -- rax : number of arguments excluding receiver |
| // -- rdi : called function (only guaranteed when |
| // extra_args requires it) |
| // -- rsi : context |
| // -- rsp[0] : return address |
| // -- rsp[8] : last argument |
| // -- ... |
| // -- rsp[8 * argc] : first argument (argc == rax) |
| // -- rsp[8 * (argc + 1)] : receiver |
| // ----------------------------------- |
| |
| // Insert extra arguments. |
| int num_extra_args = 0; |
| if (extra_args == NEEDS_CALLED_FUNCTION) { |
| num_extra_args = 1; |
| __ PopReturnAddressTo(kScratchRegister); |
| __ push(rdi); |
| __ PushReturnAddressFrom(kScratchRegister); |
| } else { |
| ASSERT(extra_args == NO_EXTRA_ARGUMENTS); |
| } |
| |
| // JumpToExternalReference expects rax to contain the number of arguments |
| // including the receiver and the extra arguments. |
| __ addq(rax, Immediate(num_extra_args + 1)); |
| __ JumpToExternalReference(ExternalReference(id, masm->isolate()), 1); |
| } |
| |
| |
| static void CallRuntimePassFunction(MacroAssembler* masm, |
| Runtime::FunctionId function_id) { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Push a copy of the function onto the stack. |
| __ push(rdi); |
| // Push call kind information. |
| __ push(rcx); |
| // Function is also the parameter to the runtime call. |
| __ push(rdi); |
| |
| __ CallRuntime(function_id, 1); |
| // Restore call kind information. |
| __ pop(rcx); |
| // Restore receiver. |
| __ pop(rdi); |
| } |
| |
| |
| static void GenerateTailCallToSharedCode(MacroAssembler* masm) { |
| __ movq(kScratchRegister, |
| FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| __ movq(kScratchRegister, |
| FieldOperand(kScratchRegister, SharedFunctionInfo::kCodeOffset)); |
| __ lea(kScratchRegister, FieldOperand(kScratchRegister, Code::kHeaderSize)); |
| __ jmp(kScratchRegister); |
| } |
| |
| |
| void Builtins::Generate_InRecompileQueue(MacroAssembler* masm) { |
| // Checking whether the queued function is ready for install is optional, |
| // since we come across interrupts and stack checks elsewhere. However, |
| // not checking may delay installing ready functions, and always checking |
| // would be quite expensive. A good compromise is to first check against |
| // stack limit as a cue for an interrupt signal. |
| Label ok; |
| __ CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| __ j(above_equal, &ok); |
| |
| CallRuntimePassFunction(masm, Runtime::kTryInstallRecompiledCode); |
| // Tail call to returned code. |
| __ lea(rax, FieldOperand(rax, Code::kHeaderSize)); |
| __ jmp(rax); |
| |
| __ bind(&ok); |
| GenerateTailCallToSharedCode(masm); |
| } |
| |
| |
| void Builtins::Generate_ConcurrentRecompile(MacroAssembler* masm) { |
| CallRuntimePassFunction(masm, Runtime::kConcurrentRecompile); |
| GenerateTailCallToSharedCode(masm); |
| } |
| |
| |
| static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| bool is_api_function, |
| bool count_constructions) { |
| // ----------- S t a t e ------------- |
| // -- rax: number of arguments |
| // -- rdi: constructor function |
| // ----------------------------------- |
| |
| // Should never count constructions for api objects. |
| ASSERT(!is_api_function || !count_constructions); |
| |
| // Enter a construct frame. |
| { |
| FrameScope scope(masm, StackFrame::CONSTRUCT); |
| |
| // Store a smi-tagged arguments count on the stack. |
| __ Integer32ToSmi(rax, rax); |
| __ push(rax); |
| |
| // Push the function to invoke on the stack. |
| __ push(rdi); |
| |
| // Try to allocate the object without transitioning into C code. If any of |
| // the preconditions is not met, the code bails out to the runtime call. |
| Label rt_call, allocated; |
| if (FLAG_inline_new) { |
| Label undo_allocation; |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| ExternalReference debug_step_in_fp = |
| ExternalReference::debug_step_in_fp_address(masm->isolate()); |
| __ movq(kScratchRegister, debug_step_in_fp); |
| __ cmpq(Operand(kScratchRegister, 0), Immediate(0)); |
| __ j(not_equal, &rt_call); |
| #endif |
| |
| // Verified that the constructor is a JSFunction. |
| // Load the initial map and verify that it is in fact a map. |
| // rdi: constructor |
| __ movq(rax, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi |
| ASSERT(kSmiTag == 0); |
| __ JumpIfSmi(rax, &rt_call); |
| // rdi: constructor |
| // rax: initial map (if proven valid below) |
| __ CmpObjectType(rax, MAP_TYPE, rbx); |
| __ j(not_equal, &rt_call); |
| |
| // Check that the constructor is not constructing a JSFunction (see |
| // comments in Runtime_NewObject in runtime.cc). In which case the |
| // initial map's instance type would be JS_FUNCTION_TYPE. |
| // rdi: constructor |
| // rax: initial map |
| __ CmpInstanceType(rax, JS_FUNCTION_TYPE); |
| __ j(equal, &rt_call); |
| |
| if (count_constructions) { |
| Label allocate; |
| // Decrease generous allocation count. |
| __ movq(rcx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| __ decb(FieldOperand(rcx, |
| SharedFunctionInfo::kConstructionCountOffset)); |
| __ j(not_zero, &allocate); |
| |
| __ push(rax); |
| __ push(rdi); |
| |
| __ push(rdi); // constructor |
| // The call will replace the stub, so the countdown is only done once. |
| __ CallRuntime(Runtime::kFinalizeInstanceSize, 1); |
| |
| __ pop(rdi); |
| __ pop(rax); |
| |
| __ bind(&allocate); |
| } |
| |
| // Now allocate the JSObject on the heap. |
| __ movzxbq(rdi, FieldOperand(rax, Map::kInstanceSizeOffset)); |
| __ shl(rdi, Immediate(kPointerSizeLog2)); |
| // rdi: size of new object |
| __ Allocate(rdi, |
| rbx, |
| rdi, |
| no_reg, |
| &rt_call, |
| NO_ALLOCATION_FLAGS); |
| // Allocated the JSObject, now initialize the fields. |
| // rax: initial map |
| // rbx: JSObject (not HeapObject tagged - the actual address). |
| // rdi: start of next object |
| __ movq(Operand(rbx, JSObject::kMapOffset), rax); |
| __ LoadRoot(rcx, Heap::kEmptyFixedArrayRootIndex); |
| __ movq(Operand(rbx, JSObject::kPropertiesOffset), rcx); |
| __ movq(Operand(rbx, JSObject::kElementsOffset), rcx); |
| // Set extra fields in the newly allocated object. |
| // rax: initial map |
| // rbx: JSObject |
| // rdi: start of next object |
| __ lea(rcx, Operand(rbx, JSObject::kHeaderSize)); |
| __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex); |
| if (count_constructions) { |
| __ movzxbq(rsi, |
| FieldOperand(rax, Map::kPreAllocatedPropertyFieldsOffset)); |
| __ lea(rsi, |
| Operand(rbx, rsi, times_pointer_size, JSObject::kHeaderSize)); |
| // rsi: offset of first field after pre-allocated fields |
| if (FLAG_debug_code) { |
| __ cmpq(rsi, rdi); |
| __ Assert(less_equal, |
| kUnexpectedNumberOfPreAllocatedPropertyFields); |
| } |
| __ InitializeFieldsWithFiller(rcx, rsi, rdx); |
| __ LoadRoot(rdx, Heap::kOnePointerFillerMapRootIndex); |
| } |
| __ InitializeFieldsWithFiller(rcx, rdi, rdx); |
| |
| // Add the object tag to make the JSObject real, so that we can continue |
| // and jump into the continuation code at any time from now on. Any |
| // failures need to undo the allocation, so that the heap is in a |
| // consistent state and verifiable. |
| // rax: initial map |
| // rbx: JSObject |
| // rdi: start of next object |
| __ or_(rbx, Immediate(kHeapObjectTag)); |
| |
| // Check if a non-empty properties array is needed. |
| // Allocate and initialize a FixedArray if it is. |
| // rax: initial map |
| // rbx: JSObject |
| // rdi: start of next object |
| // Calculate total properties described map. |
| __ movzxbq(rdx, FieldOperand(rax, Map::kUnusedPropertyFieldsOffset)); |
| __ movzxbq(rcx, |
| FieldOperand(rax, Map::kPreAllocatedPropertyFieldsOffset)); |
| __ addq(rdx, rcx); |
| // Calculate unused properties past the end of the in-object properties. |
| __ movzxbq(rcx, FieldOperand(rax, Map::kInObjectPropertiesOffset)); |
| __ subq(rdx, rcx); |
| // Done if no extra properties are to be allocated. |
| __ j(zero, &allocated); |
| __ Assert(positive, kPropertyAllocationCountFailed); |
| |
| // Scale the number of elements by pointer size and add the header for |
| // FixedArrays to the start of the next object calculation from above. |
| // rbx: JSObject |
| // rdi: start of next object (will be start of FixedArray) |
| // rdx: number of elements in properties array |
| __ Allocate(FixedArray::kHeaderSize, |
| times_pointer_size, |
| rdx, |
| rdi, |
| rax, |
| no_reg, |
| &undo_allocation, |
| RESULT_CONTAINS_TOP); |
| |
| // Initialize the FixedArray. |
| // rbx: JSObject |
| // rdi: FixedArray |
| // rdx: number of elements |
| // rax: start of next object |
| __ LoadRoot(rcx, Heap::kFixedArrayMapRootIndex); |
| __ movq(Operand(rdi, HeapObject::kMapOffset), rcx); // setup the map |
| __ Integer32ToSmi(rdx, rdx); |
| __ movq(Operand(rdi, FixedArray::kLengthOffset), rdx); // and length |
| |
| // Initialize the fields to undefined. |
| // rbx: JSObject |
| // rdi: FixedArray |
| // rax: start of next object |
| // rdx: number of elements |
| { Label loop, entry; |
| __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex); |
| __ lea(rcx, Operand(rdi, FixedArray::kHeaderSize)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ movq(Operand(rcx, 0), rdx); |
| __ addq(rcx, Immediate(kPointerSize)); |
| __ bind(&entry); |
| __ cmpq(rcx, rax); |
| __ j(below, &loop); |
| } |
| |
| // Store the initialized FixedArray into the properties field of |
| // the JSObject |
| // rbx: JSObject |
| // rdi: FixedArray |
| __ or_(rdi, Immediate(kHeapObjectTag)); // add the heap tag |
| __ movq(FieldOperand(rbx, JSObject::kPropertiesOffset), rdi); |
| |
| |
| // Continue with JSObject being successfully allocated |
| // rbx: JSObject |
| __ jmp(&allocated); |
| |
| // Undo the setting of the new top so that the heap is verifiable. For |
| // example, the map's unused properties potentially do not match the |
| // allocated objects unused properties. |
| // rbx: JSObject (previous new top) |
| __ bind(&undo_allocation); |
| __ UndoAllocationInNewSpace(rbx); |
| } |
| |
| // Allocate the new receiver object using the runtime call. |
| // rdi: function (constructor) |
| __ bind(&rt_call); |
| // Must restore rdi (constructor) before calling runtime. |
| __ movq(rdi, Operand(rsp, 0)); |
| __ push(rdi); |
| __ CallRuntime(Runtime::kNewObject, 1); |
| __ movq(rbx, rax); // store result in rbx |
| |
| // New object allocated. |
| // rbx: newly allocated object |
| __ bind(&allocated); |
| // Retrieve the function from the stack. |
| __ pop(rdi); |
| |
| // Retrieve smi-tagged arguments count from the stack. |
| __ movq(rax, Operand(rsp, 0)); |
| __ SmiToInteger32(rax, rax); |
| |
| // Push the allocated receiver to the stack. We need two copies |
| // because we may have to return the original one and the calling |
| // conventions dictate that the called function pops the receiver. |
| __ push(rbx); |
| __ push(rbx); |
| |
| // Set up pointer to last argument. |
| __ lea(rbx, Operand(rbp, StandardFrameConstants::kCallerSPOffset)); |
| |
| // Copy arguments and receiver to the expression stack. |
| Label loop, entry; |
| __ movq(rcx, rax); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ push(Operand(rbx, rcx, times_pointer_size, 0)); |
| __ bind(&entry); |
| __ decq(rcx); |
| __ j(greater_equal, &loop); |
| |
| // Call the function. |
| if (is_api_function) { |
| __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| Handle<Code> code = |
| masm->isolate()->builtins()->HandleApiCallConstruct(); |
| ParameterCount expected(0); |
| __ InvokeCode(code, expected, expected, RelocInfo::CODE_TARGET, |
| CALL_FUNCTION, NullCallWrapper(), CALL_AS_METHOD); |
| } else { |
| ParameterCount actual(rax); |
| __ InvokeFunction(rdi, actual, CALL_FUNCTION, |
| NullCallWrapper(), CALL_AS_METHOD); |
| } |
| |
| // Store offset of return address for deoptimizer. |
| if (!is_api_function && !count_constructions) { |
| masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // Restore context from the frame. |
| __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| |
| // If the result is an object (in the ECMA sense), we should get rid |
| // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| // on page 74. |
| Label use_receiver, exit; |
| // If the result is a smi, it is *not* an object in the ECMA sense. |
| __ JumpIfSmi(rax, &use_receiver); |
| |
| // If the type of the result (stored in its map) is less than |
| // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense. |
| STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(above_equal, &exit); |
| |
| // Throw away the result of the constructor invocation and use the |
| // on-stack receiver as the result. |
| __ bind(&use_receiver); |
| __ movq(rax, Operand(rsp, 0)); |
| |
| // Restore the arguments count and leave the construct frame. |
| __ bind(&exit); |
| __ movq(rbx, Operand(rsp, kPointerSize)); // Get arguments count. |
| |
| // Leave construct frame. |
| } |
| |
| // Remove caller arguments from the stack and return. |
| __ PopReturnAddressTo(rcx); |
| SmiIndex index = masm->SmiToIndex(rbx, rbx, kPointerSizeLog2); |
| __ lea(rsp, Operand(rsp, index.reg, index.scale, 1 * kPointerSize)); |
| __ PushReturnAddressFrom(rcx); |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->constructed_objects(), 1); |
| __ ret(0); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubCountdown(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, true); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, false); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, true, false); |
| } |
| |
| |
| static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| bool is_construct) { |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Expects five C++ function parameters. |
| // - Address entry (ignored) |
| // - JSFunction* function ( |
| // - Object* receiver |
| // - int argc |
| // - Object*** argv |
| // (see Handle::Invoke in execution.cc). |
| |
| // Open a C++ scope for the FrameScope. |
| { |
| // Platform specific argument handling. After this, the stack contains |
| // an internal frame and the pushed function and receiver, and |
| // register rax and rbx holds the argument count and argument array, |
| // while rdi holds the function pointer and rsi the context. |
| |
| #ifdef _WIN64 |
| // MSVC parameters in: |
| // rcx : entry (ignored) |
| // rdx : function |
| // r8 : receiver |
| // r9 : argc |
| // [rsp+0x20] : argv |
| |
| // Clear the context before we push it when entering the internal frame. |
| __ Set(rsi, 0); |
| // Enter an internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Load the function context into rsi. |
| __ movq(rsi, FieldOperand(rdx, JSFunction::kContextOffset)); |
| |
| // Push the function and the receiver onto the stack. |
| __ push(rdx); |
| __ push(r8); |
| |
| // Load the number of arguments and setup pointer to the arguments. |
| __ movq(rax, r9); |
| // Load the previous frame pointer to access C argument on stack |
| __ movq(kScratchRegister, Operand(rbp, 0)); |
| __ movq(rbx, Operand(kScratchRegister, EntryFrameConstants::kArgvOffset)); |
| // Load the function pointer into rdi. |
| __ movq(rdi, rdx); |
| #else // _WIN64 |
| // GCC parameters in: |
| // rdi : entry (ignored) |
| // rsi : function |
| // rdx : receiver |
| // rcx : argc |
| // r8 : argv |
| |
| __ movq(rdi, rsi); |
| // rdi : function |
| |
| // Clear the context before we push it when entering the internal frame. |
| __ Set(rsi, 0); |
| // Enter an internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Push the function and receiver and setup the context. |
| __ push(rdi); |
| __ push(rdx); |
| __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| |
| // Load the number of arguments and setup pointer to the arguments. |
| __ movq(rax, rcx); |
| __ movq(rbx, r8); |
| #endif // _WIN64 |
| |
| // Current stack contents: |
| // [rsp + 2 * kPointerSize ... ] : Internal frame |
| // [rsp + kPointerSize] : function |
| // [rsp] : receiver |
| // Current register contents: |
| // rax : argc |
| // rbx : argv |
| // rsi : context |
| // rdi : function |
| |
| // Copy arguments to the stack in a loop. |
| // Register rbx points to array of pointers to handle locations. |
| // Push the values of these handles. |
| Label loop, entry; |
| __ Set(rcx, 0); // Set loop variable to 0. |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ movq(kScratchRegister, Operand(rbx, rcx, times_pointer_size, 0)); |
| __ push(Operand(kScratchRegister, 0)); // dereference handle |
| __ addq(rcx, Immediate(1)); |
| __ bind(&entry); |
| __ cmpq(rcx, rax); |
| __ j(not_equal, &loop); |
| |
| // Invoke the code. |
| if (is_construct) { |
| // No type feedback cell is available |
| Handle<Object> undefined_sentinel( |
| masm->isolate()->factory()->undefined_value()); |
| __ Move(rbx, undefined_sentinel); |
| // Expects rdi to hold function pointer. |
| CallConstructStub stub(NO_CALL_FUNCTION_FLAGS); |
| __ CallStub(&stub); |
| } else { |
| ParameterCount actual(rax); |
| // Function must be in rdi. |
| __ InvokeFunction(rdi, actual, CALL_FUNCTION, |
| NullCallWrapper(), CALL_AS_METHOD); |
| } |
| // Exit the internal frame. Notice that this also removes the empty |
| // context and the function left on the stack by the code |
| // invocation. |
| } |
| |
| // TODO(X64): Is argument correct? Is there a receiver to remove? |
| __ ret(1 * kPointerSize); // Remove receiver. |
| } |
| |
| |
| void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, false); |
| } |
| |
| |
| void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, true); |
| } |
| |
| |
| void Builtins::Generate_LazyCompile(MacroAssembler* masm) { |
| CallRuntimePassFunction(masm, Runtime::kLazyCompile); |
| // Do a tail-call of the compiled function. |
| __ lea(rax, FieldOperand(rax, Code::kHeaderSize)); |
| __ jmp(rax); |
| } |
| |
| |
| void Builtins::Generate_LazyRecompile(MacroAssembler* masm) { |
| CallRuntimePassFunction(masm, Runtime::kLazyRecompile); |
| // Do a tail-call of the compiled function. |
| __ lea(rax, FieldOperand(rax, Code::kHeaderSize)); |
| __ jmp(rax); |
| } |
| |
| |
| static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
| // For now, we are relying on the fact that make_code_young doesn't do any |
| // garbage collection which allows us to save/restore the registers without |
| // worrying about which of them contain pointers. We also don't build an |
| // internal frame to make the code faster, since we shouldn't have to do stack |
| // crawls in MakeCodeYoung. This seems a bit fragile. |
| |
| // Re-execute the code that was patched back to the young age when |
| // the stub returns. |
| __ subq(Operand(rsp, 0), Immediate(5)); |
| __ Pushad(); |
| __ movq(arg_reg_2, |
| ExternalReference::isolate_address(masm->isolate())); |
| __ movq(arg_reg_1, Operand(rsp, kNumSafepointRegisters * kPointerSize)); |
| { // NOLINT |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ PrepareCallCFunction(1); |
| __ CallCFunction( |
| ExternalReference::get_make_code_young_function(masm->isolate()), 1); |
| } |
| __ Popad(); |
| __ ret(0); |
| } |
| |
| |
| #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \ |
| void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \ |
| MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } \ |
| void Builtins::Generate_Make##C##CodeYoungAgainOddMarking( \ |
| MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } |
| CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| |
| |
| void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) { |
| // Enter an internal frame. |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Preserve registers across notification, this is important for compiled |
| // stubs that tail call the runtime on deopts passing their parameters in |
| // registers. |
| __ Pushad(); |
| __ CallRuntime(Runtime::kNotifyStubFailure, 0); |
| __ Popad(); |
| // Tear down internal frame. |
| } |
| |
| __ pop(MemOperand(rsp, 0)); // Ignore state offset |
| __ ret(0); // Return to IC Miss stub, continuation still on stack. |
| } |
| |
| |
| static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| Deoptimizer::BailoutType type) { |
| // Enter an internal frame. |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Pass the deoptimization type to the runtime system. |
| __ Push(Smi::FromInt(static_cast<int>(type))); |
| |
| __ CallRuntime(Runtime::kNotifyDeoptimized, 1); |
| // Tear down internal frame. |
| } |
| |
| // Get the full codegen state from the stack and untag it. |
| __ SmiToInteger32(r10, Operand(rsp, kPCOnStackSize)); |
| |
| // Switch on the state. |
| Label not_no_registers, not_tos_rax; |
| __ cmpq(r10, Immediate(FullCodeGenerator::NO_REGISTERS)); |
| __ j(not_equal, ¬_no_registers, Label::kNear); |
| __ ret(1 * kPointerSize); // Remove state. |
| |
| __ bind(¬_no_registers); |
| __ movq(rax, Operand(rsp, kPCOnStackSize + kPointerSize)); |
| __ cmpq(r10, Immediate(FullCodeGenerator::TOS_REG)); |
| __ j(not_equal, ¬_tos_rax, Label::kNear); |
| __ ret(2 * kPointerSize); // Remove state, rax. |
| |
| __ bind(¬_tos_rax); |
| __ Abort(kNoCasesLeft); |
| } |
| |
| |
| void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| } |
| |
| |
| void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT); |
| } |
| |
| |
| void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| } |
| |
| |
| void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| // Stack Layout: |
| // rsp[0] : Return address |
| // rsp[8] : Argument n |
| // rsp[16] : Argument n-1 |
| // ... |
| // rsp[8 * n] : Argument 1 |
| // rsp[8 * (n + 1)] : Receiver (function to call) |
| // |
| // rax contains the number of arguments, n, not counting the receiver. |
| // |
| // 1. Make sure we have at least one argument. |
| { Label done; |
| __ testq(rax, rax); |
| __ j(not_zero, &done); |
| __ PopReturnAddressTo(rbx); |
| __ Push(masm->isolate()->factory()->undefined_value()); |
| __ PushReturnAddressFrom(rbx); |
| __ incq(rax); |
| __ bind(&done); |
| } |
| |
| // 2. Get the function to call (passed as receiver) from the stack, check |
| // if it is a function. |
| Label slow, non_function; |
| StackArgumentsAccessor args(rsp, rax); |
| __ movq(rdi, args.GetReceiverOperand()); |
| __ JumpIfSmi(rdi, &non_function); |
| __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| __ j(not_equal, &slow); |
| |
| // 3a. Patch the first argument if necessary when calling a function. |
| Label shift_arguments; |
| __ Set(rdx, 0); // indicate regular JS_FUNCTION |
| { Label convert_to_object, use_global_receiver, patch_receiver; |
| // Change context eagerly in case we need the global receiver. |
| __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| |
| // Do not transform the receiver for strict mode functions. |
| __ movq(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| __ testb(FieldOperand(rbx, SharedFunctionInfo::kStrictModeByteOffset), |
| Immediate(1 << SharedFunctionInfo::kStrictModeBitWithinByte)); |
| __ j(not_equal, &shift_arguments); |
| |
| // Do not transform the receiver for natives. |
| // SharedFunctionInfo is already loaded into rbx. |
| __ testb(FieldOperand(rbx, SharedFunctionInfo::kNativeByteOffset), |
| Immediate(1 << SharedFunctionInfo::kNativeBitWithinByte)); |
| __ j(not_zero, &shift_arguments); |
| |
| // Compute the receiver in non-strict mode. |
| __ movq(rbx, args.GetArgumentOperand(1)); |
| __ JumpIfSmi(rbx, &convert_to_object, Label::kNear); |
| |
| __ CompareRoot(rbx, Heap::kNullValueRootIndex); |
| __ j(equal, &use_global_receiver); |
| __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex); |
| __ j(equal, &use_global_receiver); |
| |
| STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| __ CmpObjectType(rbx, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(above_equal, &shift_arguments); |
| |
| __ bind(&convert_to_object); |
| { |
| // Enter an internal frame in order to preserve argument count. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Integer32ToSmi(rax, rax); |
| __ push(rax); |
| |
| __ push(rbx); |
| __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| __ movq(rbx, rax); |
| __ Set(rdx, 0); // indicate regular JS_FUNCTION |
| |
| __ pop(rax); |
| __ SmiToInteger32(rax, rax); |
| } |
| |
| // Restore the function to rdi. |
| __ movq(rdi, args.GetReceiverOperand()); |
| __ jmp(&patch_receiver, Label::kNear); |
| |
| // Use the global receiver object from the called function as the |
| // receiver. |
| __ bind(&use_global_receiver); |
| const int kGlobalIndex = |
| Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize; |
| __ movq(rbx, FieldOperand(rsi, kGlobalIndex)); |
| __ movq(rbx, FieldOperand(rbx, GlobalObject::kNativeContextOffset)); |
| __ movq(rbx, FieldOperand(rbx, kGlobalIndex)); |
| __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset)); |
| |
| __ bind(&patch_receiver); |
| __ movq(args.GetArgumentOperand(1), rbx); |
| |
| __ jmp(&shift_arguments); |
| } |
| |
| // 3b. Check for function proxy. |
| __ bind(&slow); |
| __ Set(rdx, 1); // indicate function proxy |
| __ CmpInstanceType(rcx, JS_FUNCTION_PROXY_TYPE); |
| __ j(equal, &shift_arguments); |
| __ bind(&non_function); |
| __ Set(rdx, 2); // indicate non-function |
| |
| // 3c. Patch the first argument when calling a non-function. The |
| // CALL_NON_FUNCTION builtin expects the non-function callee as |
| // receiver, so overwrite the first argument which will ultimately |
| // become the receiver. |
| __ movq(args.GetArgumentOperand(1), rdi); |
| |
| // 4. Shift arguments and return address one slot down on the stack |
| // (overwriting the original receiver). Adjust argument count to make |
| // the original first argument the new receiver. |
| __ bind(&shift_arguments); |
| { Label loop; |
| __ movq(rcx, rax); |
| __ bind(&loop); |
| __ movq(rbx, Operand(rsp, rcx, times_pointer_size, 0)); |
| __ movq(Operand(rsp, rcx, times_pointer_size, 1 * kPointerSize), rbx); |
| __ decq(rcx); |
| __ j(not_sign, &loop); // While non-negative (to copy return address). |
| __ pop(rbx); // Discard copy of return address. |
| __ decq(rax); // One fewer argument (first argument is new receiver). |
| } |
| |
| // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin, |
| // or a function proxy via CALL_FUNCTION_PROXY. |
| { Label function, non_proxy; |
| __ testq(rdx, rdx); |
| __ j(zero, &function); |
| __ Set(rbx, 0); |
| __ SetCallKind(rcx, CALL_AS_METHOD); |
| __ cmpq(rdx, Immediate(1)); |
| __ j(not_equal, &non_proxy); |
| |
| __ PopReturnAddressTo(rdx); |
| __ push(rdi); // re-add proxy object as additional argument |
| __ PushReturnAddressFrom(rdx); |
| __ incq(rax); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_FUNCTION_PROXY); |
| __ jmp(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| RelocInfo::CODE_TARGET); |
| |
| __ bind(&non_proxy); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_NON_FUNCTION); |
| __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| RelocInfo::CODE_TARGET); |
| __ bind(&function); |
| } |
| |
| // 5b. Get the code to call from the function and check that the number of |
| // expected arguments matches what we're providing. If so, jump |
| // (tail-call) to the code in register edx without checking arguments. |
| __ movq(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| __ movsxlq(rbx, |
| FieldOperand(rdx, |
| SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
| __ SetCallKind(rcx, CALL_AS_METHOD); |
| __ cmpq(rax, rbx); |
| __ j(not_equal, |
| masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| RelocInfo::CODE_TARGET); |
| |
| ParameterCount expected(0); |
| __ InvokeCode(rdx, expected, expected, JUMP_FUNCTION, |
| NullCallWrapper(), CALL_AS_METHOD); |
| } |
| |
| |
| void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| // Stack at entry: |
| // rsp : return address |
| // rsp[8] : arguments |
| // rsp[16] : receiver ("this") |
| // rsp[24] : function |
| { |
| FrameScope frame_scope(masm, StackFrame::INTERNAL); |
| // Stack frame: |
| // rbp : Old base pointer |
| // rbp[8] : return address |
| // rbp[16] : function arguments |
| // rbp[24] : receiver |
| // rbp[32] : function |
| static const int kArgumentsOffset = 2 * kPointerSize; |
| static const int kReceiverOffset = 3 * kPointerSize; |
| static const int kFunctionOffset = 4 * kPointerSize; |
| |
| __ push(Operand(rbp, kFunctionOffset)); |
| __ push(Operand(rbp, kArgumentsOffset)); |
| __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
| |
| // Check the stack for overflow. We are not trying to catch |
| // interruptions (e.g. debug break and preemption) here, so the "real stack |
| // limit" is checked. |
| Label okay; |
| __ LoadRoot(kScratchRegister, Heap::kRealStackLimitRootIndex); |
| __ movq(rcx, rsp); |
| // Make rcx the space we have left. The stack might already be overflowed |
| // here which will cause rcx to become negative. |
| __ subq(rcx, kScratchRegister); |
| // Make rdx the space we need for the array when it is unrolled onto the |
| // stack. |
| __ PositiveSmiTimesPowerOfTwoToInteger64(rdx, rax, kPointerSizeLog2); |
| // Check if the arguments will overflow the stack. |
| __ cmpq(rcx, rdx); |
| __ j(greater, &okay); // Signed comparison. |
| |
| // Out of stack space. |
| __ push(Operand(rbp, kFunctionOffset)); |
| __ push(rax); |
| __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION); |
| __ bind(&okay); |
| // End of stack check. |
| |
| // Push current index and limit. |
| const int kLimitOffset = |
| StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize; |
| const int kIndexOffset = kLimitOffset - 1 * kPointerSize; |
| __ push(rax); // limit |
| __ push(Immediate(0)); // index |
| |
| // Get the receiver. |
| __ movq(rbx, Operand(rbp, kReceiverOffset)); |
| |
| // Check that the function is a JS function (otherwise it must be a proxy). |
| Label push_receiver; |
| __ movq(rdi, Operand(rbp, kFunctionOffset)); |
| __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| __ j(not_equal, &push_receiver); |
| |
| // Change context eagerly to get the right global object if necessary. |
| __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| |
| // Do not transform the receiver for strict mode functions. |
| Label call_to_object, use_global_receiver; |
| __ movq(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| __ testb(FieldOperand(rdx, SharedFunctionInfo::kStrictModeByteOffset), |
| Immediate(1 << SharedFunctionInfo::kStrictModeBitWithinByte)); |
| __ j(not_equal, &push_receiver); |
| |
| // Do not transform the receiver for natives. |
| __ testb(FieldOperand(rdx, SharedFunctionInfo::kNativeByteOffset), |
| Immediate(1 << SharedFunctionInfo::kNativeBitWithinByte)); |
| __ j(not_equal, &push_receiver); |
| |
| // Compute the receiver in non-strict mode. |
| __ JumpIfSmi(rbx, &call_to_object, Label::kNear); |
| __ CompareRoot(rbx, Heap::kNullValueRootIndex); |
| __ j(equal, &use_global_receiver); |
| __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex); |
| __ j(equal, &use_global_receiver); |
| |
| // If given receiver is already a JavaScript object then there's no |
| // reason for converting it. |
| STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| __ CmpObjectType(rbx, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(above_equal, &push_receiver); |
| |
| // Convert the receiver to an object. |
| __ bind(&call_to_object); |
| __ push(rbx); |
| __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| __ movq(rbx, rax); |
| __ jmp(&push_receiver, Label::kNear); |
| |
| // Use the current global receiver object as the receiver. |
| __ bind(&use_global_receiver); |
| const int kGlobalOffset = |
| Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize; |
| __ movq(rbx, FieldOperand(rsi, kGlobalOffset)); |
| __ movq(rbx, FieldOperand(rbx, GlobalObject::kNativeContextOffset)); |
| __ movq(rbx, FieldOperand(rbx, kGlobalOffset)); |
| __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset)); |
| |
| // Push the receiver. |
| __ bind(&push_receiver); |
| __ push(rbx); |
| |
| // Copy all arguments from the array to the stack. |
| Label entry, loop; |
| __ movq(rax, Operand(rbp, kIndexOffset)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ movq(rdx, Operand(rbp, kArgumentsOffset)); // load arguments |
| |
| // Use inline caching to speed up access to arguments. |
| Handle<Code> ic = |
| masm->isolate()->builtins()->KeyedLoadIC_Initialize(); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| // It is important that we do not have a test instruction after the |
| // call. A test instruction after the call is used to indicate that |
| // we have generated an inline version of the keyed load. In this |
| // case, we know that we are not generating a test instruction next. |
| |
| // Push the nth argument. |
| __ push(rax); |
| |
| // Update the index on the stack and in register rax. |
| __ movq(rax, Operand(rbp, kIndexOffset)); |
| __ SmiAddConstant(rax, rax, Smi::FromInt(1)); |
| __ movq(Operand(rbp, kIndexOffset), rax); |
| |
| __ bind(&entry); |
| __ cmpq(rax, Operand(rbp, kLimitOffset)); |
| __ j(not_equal, &loop); |
| |
| // Invoke the function. |
| Label call_proxy; |
| ParameterCount actual(rax); |
| __ SmiToInteger32(rax, rax); |
| __ movq(rdi, Operand(rbp, kFunctionOffset)); |
| __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| __ j(not_equal, &call_proxy); |
| __ InvokeFunction(rdi, actual, CALL_FUNCTION, |
| NullCallWrapper(), CALL_AS_METHOD); |
| |
| frame_scope.GenerateLeaveFrame(); |
| __ ret(3 * kPointerSize); // remove this, receiver, and arguments |
| |
| // Invoke the function proxy. |
| __ bind(&call_proxy); |
| __ push(rdi); // add function proxy as last argument |
| __ incq(rax); |
| __ Set(rbx, 0); |
| __ SetCallKind(rcx, CALL_AS_METHOD); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_FUNCTION_PROXY); |
| __ call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| RelocInfo::CODE_TARGET); |
| |
| // Leave internal frame. |
| } |
| __ ret(3 * kPointerSize); // remove this, receiver, and arguments |
| } |
| |
| |
| void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- rax : argc |
| // -- rsp[0] : return address |
| // -- rsp[8] : last argument |
| // ----------------------------------- |
| Label generic_array_code; |
| |
| // Get the InternalArray function. |
| __ LoadGlobalFunction(Context::INTERNAL_ARRAY_FUNCTION_INDEX, rdi); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin InternalArray functions should be maps. |
| __ movq(rbx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| STATIC_ASSERT(kSmiTag == 0); |
| Condition not_smi = NegateCondition(masm->CheckSmi(rbx)); |
| __ Check(not_smi, kUnexpectedInitialMapForInternalArrayFunction); |
| __ CmpObjectType(rbx, MAP_TYPE, rcx); |
| __ Check(equal, kUnexpectedInitialMapForInternalArrayFunction); |
| } |
| |
| // Run the native code for the InternalArray function called as a normal |
| // function. |
| // tail call a stub |
| InternalArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- rax : argc |
| // -- rsp[0] : return address |
| // -- rsp[8] : last argument |
| // ----------------------------------- |
| Label generic_array_code; |
| |
| // Get the Array function. |
| __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, rdi); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin Array functions should be maps. |
| __ movq(rbx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| STATIC_ASSERT(kSmiTag == 0); |
| Condition not_smi = NegateCondition(masm->CheckSmi(rbx)); |
| __ Check(not_smi, kUnexpectedInitialMapForArrayFunction); |
| __ CmpObjectType(rbx, MAP_TYPE, rcx); |
| __ Check(equal, kUnexpectedInitialMapForArrayFunction); |
| } |
| |
| // Run the native code for the Array function called as a normal function. |
| // tail call a stub |
| Handle<Object> undefined_sentinel( |
| masm->isolate()->heap()->undefined_value(), |
| masm->isolate()); |
| __ Move(rbx, undefined_sentinel); |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| void Builtins::Generate_StringConstructCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- rax : number of arguments |
| // -- rdi : constructor function |
| // -- rsp[0] : return address |
| // -- rsp[(argc - n) * 8] : arg[n] (zero-based) |
| // -- rsp[(argc + 1) * 8] : receiver |
| // ----------------------------------- |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->string_ctor_calls(), 1); |
| |
| if (FLAG_debug_code) { |
| __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, rcx); |
| __ cmpq(rdi, rcx); |
| __ Assert(equal, kUnexpectedStringFunction); |
| } |
| |
| // Load the first argument into rax and get rid of the rest |
| // (including the receiver). |
| StackArgumentsAccessor args(rsp, rax); |
| Label no_arguments; |
| __ testq(rax, rax); |
| __ j(zero, &no_arguments); |
| __ movq(rbx, args.GetArgumentOperand(1)); |
| __ PopReturnAddressTo(rcx); |
| __ lea(rsp, Operand(rsp, rax, times_pointer_size, kPointerSize)); |
| __ PushReturnAddressFrom(rcx); |
| __ movq(rax, rbx); |
| |
| // Lookup the argument in the number to string cache. |
| Label not_cached, argument_is_string; |
| __ LookupNumberStringCache(rax, // Input. |
| rbx, // Result. |
| rcx, // Scratch 1. |
| rdx, // Scratch 2. |
| ¬_cached); |
| __ IncrementCounter(counters->string_ctor_cached_number(), 1); |
| __ bind(&argument_is_string); |
| |
| // ----------- S t a t e ------------- |
| // -- rbx : argument converted to string |
| // -- rdi : constructor function |
| // -- rsp[0] : return address |
| // ----------------------------------- |
| |
| // Allocate a JSValue and put the tagged pointer into rax. |
| Label gc_required; |
| __ Allocate(JSValue::kSize, |
| rax, // Result. |
| rcx, // New allocation top (we ignore it). |
| no_reg, |
| &gc_required, |
| TAG_OBJECT); |
| |
| // Set the map. |
| __ LoadGlobalFunctionInitialMap(rdi, rcx); |
| if (FLAG_debug_code) { |
| __ cmpb(FieldOperand(rcx, Map::kInstanceSizeOffset), |
| Immediate(JSValue::kSize >> kPointerSizeLog2)); |
| __ Assert(equal, kUnexpectedStringWrapperInstanceSize); |
| __ cmpb(FieldOperand(rcx, Map::kUnusedPropertyFieldsOffset), Immediate(0)); |
| __ Assert(equal, kUnexpectedUnusedPropertiesOfStringWrapper); |
| } |
| __ movq(FieldOperand(rax, HeapObject::kMapOffset), rcx); |
| |
| // Set properties and elements. |
| __ LoadRoot(rcx, Heap::kEmptyFixedArrayRootIndex); |
| __ movq(FieldOperand(rax, JSObject::kPropertiesOffset), rcx); |
| __ movq(FieldOperand(rax, JSObject::kElementsOffset), rcx); |
| |
| // Set the value. |
| __ movq(FieldOperand(rax, JSValue::kValueOffset), rbx); |
| |
| // Ensure the object is fully initialized. |
| STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
| |
| // We're done. Return. |
| __ ret(0); |
| |
| // The argument was not found in the number to string cache. Check |
| // if it's a string already before calling the conversion builtin. |
| Label convert_argument; |
| __ bind(¬_cached); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfSmi(rax, &convert_argument); |
| Condition is_string = masm->IsObjectStringType(rax, rbx, rcx); |
| __ j(NegateCondition(is_string), &convert_argument); |
| __ movq(rbx, rax); |
| __ IncrementCounter(counters->string_ctor_string_value(), 1); |
| __ jmp(&argument_is_string); |
| |
| // Invoke the conversion builtin and put the result into rbx. |
| __ bind(&convert_argument); |
| __ IncrementCounter(counters->string_ctor_conversions(), 1); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ push(rdi); // Preserve the function. |
| __ push(rax); |
| __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION); |
| __ pop(rdi); |
| } |
| __ movq(rbx, rax); |
| __ jmp(&argument_is_string); |
| |
| // Load the empty string into rbx, remove the receiver from the |
| // stack, and jump back to the case where the argument is a string. |
| __ bind(&no_arguments); |
| __ LoadRoot(rbx, Heap::kempty_stringRootIndex); |
| __ PopReturnAddressTo(rcx); |
| __ lea(rsp, Operand(rsp, kPointerSize)); |
| __ PushReturnAddressFrom(rcx); |
| __ jmp(&argument_is_string); |
| |
| // At this point the argument is already a string. Call runtime to |
| // create a string wrapper. |
| __ bind(&gc_required); |
| __ IncrementCounter(counters->string_ctor_gc_required(), 1); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ push(rbx); |
| __ CallRuntime(Runtime::kNewStringWrapper, 1); |
| } |
| __ ret(0); |
| } |
| |
| |
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| __ push(rbp); |
| __ movq(rbp, rsp); |
| |
| // Store the arguments adaptor context sentinel. |
| __ Push(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| |
| // Push the function on the stack. |
| __ push(rdi); |
| |
| // Preserve the number of arguments on the stack. Must preserve rax, |
| // rbx and rcx because these registers are used when copying the |
| // arguments and the receiver. |
| __ Integer32ToSmi(r8, rax); |
| __ push(r8); |
| } |
| |
| |
| static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| // Retrieve the number of arguments from the stack. Number is a Smi. |
| __ movq(rbx, Operand(rbp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| |
| // Leave the frame. |
| __ movq(rsp, rbp); |
| __ pop(rbp); |
| |
| // Remove caller arguments from the stack. |
| __ PopReturnAddressTo(rcx); |
| SmiIndex index = masm->SmiToIndex(rbx, rbx, kPointerSizeLog2); |
| __ lea(rsp, Operand(rsp, index.reg, index.scale, 1 * kPointerSize)); |
| __ PushReturnAddressFrom(rcx); |
| } |
| |
| |
| void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- rax : actual number of arguments |
| // -- rbx : expected number of arguments |
| // -- rcx : call kind information |
| // -- rdx : code entry to call |
| // ----------------------------------- |
| |
| Label invoke, dont_adapt_arguments; |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->arguments_adaptors(), 1); |
| |
| Label enough, too_few; |
| __ cmpq(rax, rbx); |
| __ j(less, &too_few); |
| __ cmpq(rbx, Immediate(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| __ j(equal, &dont_adapt_arguments); |
| |
| { // Enough parameters: Actual >= expected. |
| __ bind(&enough); |
| EnterArgumentsAdaptorFrame(masm); |
| |
| // Copy receiver and all expected arguments. |
| const int offset = StandardFrameConstants::kCallerSPOffset; |
| __ lea(rax, Operand(rbp, rax, times_pointer_size, offset)); |
| __ Set(r8, -1); // account for receiver |
| |
| Label copy; |
| __ bind(©); |
| __ incq(r8); |
| __ push(Operand(rax, 0)); |
| __ subq(rax, Immediate(kPointerSize)); |
| __ cmpq(r8, rbx); |
| __ j(less, ©); |
| __ jmp(&invoke); |
| } |
| |
| { // Too few parameters: Actual < expected. |
| __ bind(&too_few); |
| EnterArgumentsAdaptorFrame(masm); |
| |
| // Copy receiver and all actual arguments. |
| const int offset = StandardFrameConstants::kCallerSPOffset; |
| __ lea(rdi, Operand(rbp, rax, times_pointer_size, offset)); |
| __ Set(r8, -1); // account for receiver |
| |
| Label copy; |
| __ bind(©); |
| __ incq(r8); |
| __ push(Operand(rdi, 0)); |
| __ subq(rdi, Immediate(kPointerSize)); |
| __ cmpq(r8, rax); |
| __ j(less, ©); |
| |
| // Fill remaining expected arguments with undefined values. |
| Label fill; |
| __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex); |
| __ bind(&fill); |
| __ incq(r8); |
| __ push(kScratchRegister); |
| __ cmpq(r8, rbx); |
| __ j(less, &fill); |
| |
| // Restore function pointer. |
| __ movq(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| // Call the entry point. |
| __ bind(&invoke); |
| __ call(rdx); |
| |
| // Store offset of return address for deoptimizer. |
| masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| |
| // Leave frame and return. |
| LeaveArgumentsAdaptorFrame(masm); |
| __ ret(0); |
| |
| // ------------------------------------------- |
| // Dont adapt arguments. |
| // ------------------------------------------- |
| __ bind(&dont_adapt_arguments); |
| __ jmp(rdx); |
| } |
| |
| |
| void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
| // Lookup the function in the JavaScript frame. |
| __ movq(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Lookup and calculate pc offset. |
| __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerPCOffset)); |
| __ movq(rbx, FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset)); |
| __ subq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| __ subq(rdx, FieldOperand(rbx, SharedFunctionInfo::kCodeOffset)); |
| __ Integer32ToSmi(rdx, rdx); |
| |
| // Pass both function and pc offset as arguments. |
| __ push(rax); |
| __ push(rdx); |
| __ CallRuntime(Runtime::kCompileForOnStackReplacement, 2); |
| } |
| |
| Label skip; |
| // If the code object is null, just return to the unoptimized code. |
| __ cmpq(rax, Immediate(0)); |
| __ j(not_equal, &skip, Label::kNear); |
| __ ret(0); |
| |
| __ bind(&skip); |
| |
| // Load deoptimization data from the code object. |
| __ movq(rbx, Operand(rax, Code::kDeoptimizationDataOffset - kHeapObjectTag)); |
| |
| // Load the OSR entrypoint offset from the deoptimization data. |
| __ SmiToInteger32(rbx, Operand(rbx, FixedArray::OffsetOfElementAt( |
| DeoptimizationInputData::kOsrPcOffsetIndex) - kHeapObjectTag)); |
| |
| // Compute the target address = code_obj + header_size + osr_offset |
| __ lea(rax, Operand(rax, rbx, times_1, Code::kHeaderSize - kHeapObjectTag)); |
| |
| // Overwrite the return address on the stack. |
| __ movq(Operand(rsp, 0), rax); |
| |
| // And "return" to the OSR entry point of the function. |
| __ ret(0); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_X64 |
