diff options
Diffstat (limited to 'chromium/v8/src/x87/builtins-x87.cc')
| -rw-r--r-- | chromium/v8/src/x87/builtins-x87.cc | 1452 |
1 files changed, 1452 insertions, 0 deletions
diff --git a/chromium/v8/src/x87/builtins-x87.cc b/chromium/v8/src/x87/builtins-x87.cc new file mode 100644 index 00000000000..8db42d8e560 --- /dev/null +++ b/chromium/v8/src/x87/builtins-x87.cc @@ -0,0 +1,1452 @@ +// Copyright 2012 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "src/v8.h" + +#if V8_TARGET_ARCH_X87 + +#include "src/codegen.h" +#include "src/deoptimizer.h" +#include "src/full-codegen.h" +#include "src/stub-cache.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 ------------- + // -- eax : number of arguments excluding receiver + // -- edi : called function (only guaranteed when + // extra_args requires it) + // -- esi : context + // -- esp[0] : return address + // -- esp[4] : last argument + // -- ... + // -- esp[4 * argc] : first argument (argc == eax) + // -- esp[4 * (argc +1)] : receiver + // ----------------------------------- + + // Insert extra arguments. + int num_extra_args = 0; + if (extra_args == NEEDS_CALLED_FUNCTION) { + num_extra_args = 1; + Register scratch = ebx; + __ pop(scratch); // Save return address. + __ push(edi); + __ push(scratch); // Restore return address. + } else { + ASSERT(extra_args == NO_EXTRA_ARGUMENTS); + } + + // JumpToExternalReference expects eax to contain the number of arguments + // including the receiver and the extra arguments. + __ add(eax, Immediate(num_extra_args + 1)); + __ JumpToExternalReference(ExternalReference(id, masm->isolate())); +} + + +static void CallRuntimePassFunction( + MacroAssembler* masm, Runtime::FunctionId function_id) { + FrameScope scope(masm, StackFrame::INTERNAL); + // Push a copy of the function. + __ push(edi); + // Function is also the parameter to the runtime call. + __ push(edi); + + __ CallRuntime(function_id, 1); + // Restore receiver. + __ pop(edi); +} + + +static void GenerateTailCallToSharedCode(MacroAssembler* masm) { + __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); + __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kCodeOffset)); + __ lea(eax, FieldOperand(eax, Code::kHeaderSize)); + __ jmp(eax); +} + + +static void GenerateTailCallToReturnedCode(MacroAssembler* masm) { + __ lea(eax, FieldOperand(eax, Code::kHeaderSize)); + __ jmp(eax); +} + + +void Builtins::Generate_InOptimizationQueue(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; + ExternalReference stack_limit = + ExternalReference::address_of_stack_limit(masm->isolate()); + __ cmp(esp, Operand::StaticVariable(stack_limit)); + __ j(above_equal, &ok, Label::kNear); + + CallRuntimePassFunction(masm, Runtime::kHiddenTryInstallOptimizedCode); + GenerateTailCallToReturnedCode(masm); + + __ bind(&ok); + GenerateTailCallToSharedCode(masm); +} + + +static void Generate_JSConstructStubHelper(MacroAssembler* masm, + bool is_api_function, + bool create_memento) { + // ----------- S t a t e ------------- + // -- eax: number of arguments + // -- edi: constructor function + // -- ebx: allocation site or undefined + // ----------------------------------- + + // Should never create mementos for api functions. + ASSERT(!is_api_function || !create_memento); + + // Enter a construct frame. + { + FrameScope scope(masm, StackFrame::CONSTRUCT); + + if (create_memento) { + __ AssertUndefinedOrAllocationSite(ebx); + __ push(ebx); + } + + // Store a smi-tagged arguments count on the stack. + __ SmiTag(eax); + __ push(eax); + + // Push the function to invoke on the stack. + __ push(edi); + + // 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; + ExternalReference debug_step_in_fp = + ExternalReference::debug_step_in_fp_address(masm->isolate()); + __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0)); + __ j(not_equal, &rt_call); + + // Verified that the constructor is a JSFunction. + // Load the initial map and verify that it is in fact a map. + // edi: constructor + __ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); + // Will both indicate a NULL and a Smi + __ JumpIfSmi(eax, &rt_call); + // edi: constructor + // eax: initial map (if proven valid below) + __ CmpObjectType(eax, MAP_TYPE, ebx); + __ 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. + // edi: constructor + // eax: initial map + __ CmpInstanceType(eax, JS_FUNCTION_TYPE); + __ j(equal, &rt_call); + + if (!is_api_function) { + Label allocate; + // The code below relies on these assumptions. + STATIC_ASSERT(JSFunction::kNoSlackTracking == 0); + STATIC_ASSERT(Map::ConstructionCount::kShift + + Map::ConstructionCount::kSize == 32); + // Check if slack tracking is enabled. + __ mov(esi, FieldOperand(eax, Map::kBitField3Offset)); + __ shr(esi, Map::ConstructionCount::kShift); + __ j(zero, &allocate); // JSFunction::kNoSlackTracking + // Decrease generous allocation count. + __ sub(FieldOperand(eax, Map::kBitField3Offset), + Immediate(1 << Map::ConstructionCount::kShift)); + + __ cmp(esi, JSFunction::kFinishSlackTracking); + __ j(not_equal, &allocate); + + __ push(eax); + __ push(edi); + + __ push(edi); // constructor + __ CallRuntime(Runtime::kHiddenFinalizeInstanceSize, 1); + + __ pop(edi); + __ pop(eax); + __ xor_(esi, esi); // JSFunction::kNoSlackTracking + + __ bind(&allocate); + } + + // Now allocate the JSObject on the heap. + // edi: constructor + // eax: initial map + __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset)); + __ shl(edi, kPointerSizeLog2); + if (create_memento) { + __ add(edi, Immediate(AllocationMemento::kSize)); + } + + __ Allocate(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS); + + Factory* factory = masm->isolate()->factory(); + + // Allocated the JSObject, now initialize the fields. + // eax: initial map + // ebx: JSObject + // edi: start of next object (including memento if create_memento) + __ mov(Operand(ebx, JSObject::kMapOffset), eax); + __ mov(ecx, factory->empty_fixed_array()); + __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx); + __ mov(Operand(ebx, JSObject::kElementsOffset), ecx); + // Set extra fields in the newly allocated object. + // eax: initial map + // ebx: JSObject + // edi: start of next object (including memento if create_memento) + // esi: slack tracking counter (non-API function case) + __ mov(edx, factory->undefined_value()); + __ lea(ecx, Operand(ebx, JSObject::kHeaderSize)); + if (!is_api_function) { + Label no_inobject_slack_tracking; + + // Check if slack tracking is enabled. + __ cmp(esi, JSFunction::kNoSlackTracking); + __ j(equal, &no_inobject_slack_tracking); + + // Allocate object with a slack. + __ movzx_b(esi, + FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset)); + __ lea(esi, + Operand(ebx, esi, times_pointer_size, JSObject::kHeaderSize)); + // esi: offset of first field after pre-allocated fields + if (FLAG_debug_code) { + __ cmp(esi, edi); + __ Assert(less_equal, + kUnexpectedNumberOfPreAllocatedPropertyFields); + } + __ InitializeFieldsWithFiller(ecx, esi, edx); + __ mov(edx, factory->one_pointer_filler_map()); + // Fill the remaining fields with one pointer filler map. + + __ bind(&no_inobject_slack_tracking); + } + + if (create_memento) { + __ lea(esi, Operand(edi, -AllocationMemento::kSize)); + __ InitializeFieldsWithFiller(ecx, esi, edx); + + // Fill in memento fields if necessary. + // esi: points to the allocated but uninitialized memento. + __ mov(Operand(esi, AllocationMemento::kMapOffset), + factory->allocation_memento_map()); + // Get the cell or undefined. + __ mov(edx, Operand(esp, kPointerSize*2)); + __ mov(Operand(esi, AllocationMemento::kAllocationSiteOffset), + edx); + } else { + __ InitializeFieldsWithFiller(ecx, edi, edx); + } + + // 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. + // eax: initial map + // ebx: JSObject + // edi: start of next object + __ or_(ebx, Immediate(kHeapObjectTag)); + + // Check if a non-empty properties array is needed. + // Allocate and initialize a FixedArray if it is. + // eax: initial map + // ebx: JSObject + // edi: start of next object + // Calculate the total number of properties described by the map. + __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset)); + __ movzx_b(ecx, + FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset)); + __ add(edx, ecx); + // Calculate unused properties past the end of the in-object properties. + __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset)); + __ sub(edx, ecx); + // 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. + // ebx: JSObject + // edi: start of next object (will be start of FixedArray) + // edx: number of elements in properties array + __ Allocate(FixedArray::kHeaderSize, + times_pointer_size, + edx, + REGISTER_VALUE_IS_INT32, + edi, + ecx, + no_reg, + &undo_allocation, + RESULT_CONTAINS_TOP); + + // Initialize the FixedArray. + // ebx: JSObject + // edi: FixedArray + // edx: number of elements + // ecx: start of next object + __ mov(eax, factory->fixed_array_map()); + __ mov(Operand(edi, FixedArray::kMapOffset), eax); // setup the map + __ SmiTag(edx); + __ mov(Operand(edi, FixedArray::kLengthOffset), edx); // and length + + // Initialize the fields to undefined. + // ebx: JSObject + // edi: FixedArray + // ecx: start of next object + { Label loop, entry; + __ mov(edx, factory->undefined_value()); + __ lea(eax, Operand(edi, FixedArray::kHeaderSize)); + __ jmp(&entry); + __ bind(&loop); + __ mov(Operand(eax, 0), edx); + __ add(eax, Immediate(kPointerSize)); + __ bind(&entry); + __ cmp(eax, ecx); + __ j(below, &loop); + } + + // Store the initialized FixedArray into the properties field of + // the JSObject + // ebx: JSObject + // edi: FixedArray + __ or_(edi, Immediate(kHeapObjectTag)); // add the heap tag + __ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi); + + + // Continue with JSObject being successfully allocated + // ebx: 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. + // ebx: JSObject (previous new top) + __ bind(&undo_allocation); + __ UndoAllocationInNewSpace(ebx); + } + + // Allocate the new receiver object using the runtime call. + __ bind(&rt_call); + int offset = 0; + if (create_memento) { + // Get the cell or allocation site. + __ mov(edi, Operand(esp, kPointerSize * 2)); + __ push(edi); + offset = kPointerSize; + } + + // Must restore esi (context) and edi (constructor) before calling runtime. + __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); + __ mov(edi, Operand(esp, offset)); + // edi: function (constructor) + __ push(edi); + if (create_memento) { + __ CallRuntime(Runtime::kHiddenNewObjectWithAllocationSite, 2); + } else { + __ CallRuntime(Runtime::kHiddenNewObject, 1); + } + __ mov(ebx, eax); // store result in ebx + + // If we ended up using the runtime, and we want a memento, then the + // runtime call made it for us, and we shouldn't do create count + // increment. + Label count_incremented; + if (create_memento) { + __ jmp(&count_incremented); + } + + // New object allocated. + // ebx: newly allocated object + __ bind(&allocated); + + if (create_memento) { + __ mov(ecx, Operand(esp, kPointerSize * 2)); + __ cmp(ecx, masm->isolate()->factory()->undefined_value()); + __ j(equal, &count_incremented); + // ecx is an AllocationSite. We are creating a memento from it, so we + // need to increment the memento create count. + __ add(FieldOperand(ecx, AllocationSite::kPretenureCreateCountOffset), + Immediate(Smi::FromInt(1))); + __ bind(&count_incremented); + } + + // Retrieve the function from the stack. + __ pop(edi); + + // Retrieve smi-tagged arguments count from the stack. + __ mov(eax, Operand(esp, 0)); + __ SmiUntag(eax); + + // 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(ebx); + __ push(ebx); + + // Set up pointer to last argument. + __ lea(ebx, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); + + // Copy arguments and receiver to the expression stack. + Label loop, entry; + __ mov(ecx, eax); + __ jmp(&entry); + __ bind(&loop); + __ push(Operand(ebx, ecx, times_4, 0)); + __ bind(&entry); + __ dec(ecx); + __ j(greater_equal, &loop); + + // Call the function. + if (is_api_function) { + __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); + Handle<Code> code = + masm->isolate()->builtins()->HandleApiCallConstruct(); + __ call(code, RelocInfo::CODE_TARGET); + } else { + ParameterCount actual(eax); + __ InvokeFunction(edi, actual, CALL_FUNCTION, + NullCallWrapper()); + } + + // Store offset of return address for deoptimizer. + if (!is_api_function) { + masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); + } + + // Restore context from the frame. + __ mov(esi, Operand(ebp, 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(eax, &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. + __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx); + __ j(above_equal, &exit); + + // Throw away the result of the constructor invocation and use the + // on-stack receiver as the result. + __ bind(&use_receiver); + __ mov(eax, Operand(esp, 0)); + + // Restore the arguments count and leave the construct frame. + __ bind(&exit); + __ mov(ebx, Operand(esp, kPointerSize)); // Get arguments count. + + // Leave construct frame. + } + + // Remove caller arguments from the stack and return. + STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); + __ pop(ecx); + __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver + __ push(ecx); + __ IncrementCounter(masm->isolate()->counters()->constructed_objects(), 1); + __ ret(0); +} + + +void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { + Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new); +} + + +void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { + Generate_JSConstructStubHelper(masm, true, false); +} + + +static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, + bool is_construct) { + ProfileEntryHookStub::MaybeCallEntryHook(masm); + + // Clear the context before we push it when entering the internal frame. + __ Move(esi, Immediate(0)); + + { + FrameScope scope(masm, StackFrame::INTERNAL); + + // Load the previous frame pointer (ebx) to access C arguments + __ mov(ebx, Operand(ebp, 0)); + + // Get the function from the frame and setup the context. + __ mov(ecx, Operand(ebx, EntryFrameConstants::kFunctionArgOffset)); + __ mov(esi, FieldOperand(ecx, JSFunction::kContextOffset)); + + // Push the function and the receiver onto the stack. + __ push(ecx); + __ push(Operand(ebx, EntryFrameConstants::kReceiverArgOffset)); + + // Load the number of arguments and setup pointer to the arguments. + __ mov(eax, Operand(ebx, EntryFrameConstants::kArgcOffset)); + __ mov(ebx, Operand(ebx, EntryFrameConstants::kArgvOffset)); + + // Copy arguments to the stack in a loop. + Label loop, entry; + __ Move(ecx, Immediate(0)); + __ jmp(&entry); + __ bind(&loop); + __ mov(edx, Operand(ebx, ecx, times_4, 0)); // push parameter from argv + __ push(Operand(edx, 0)); // dereference handle + __ inc(ecx); + __ bind(&entry); + __ cmp(ecx, eax); + __ j(not_equal, &loop); + + // Get the function from the stack and call it. + // kPointerSize for the receiver. + __ mov(edi, Operand(esp, eax, times_4, kPointerSize)); + + // Invoke the code. + if (is_construct) { + // No type feedback cell is available + __ mov(ebx, masm->isolate()->factory()->undefined_value()); + CallConstructStub stub(masm->isolate(), NO_CALL_CONSTRUCTOR_FLAGS); + __ CallStub(&stub); + } else { + ParameterCount actual(eax); + __ InvokeFunction(edi, actual, CALL_FUNCTION, + NullCallWrapper()); + } + + // Exit the internal frame. Notice that this also removes the empty. + // context and the function left on the stack by the code + // invocation. + } + __ ret(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_CompileUnoptimized(MacroAssembler* masm) { + CallRuntimePassFunction(masm, Runtime::kHiddenCompileUnoptimized); + GenerateTailCallToReturnedCode(masm); +} + + + +static void CallCompileOptimized(MacroAssembler* masm, bool concurrent) { + FrameScope scope(masm, StackFrame::INTERNAL); + // Push a copy of the function. + __ push(edi); + // Function is also the parameter to the runtime call. + __ push(edi); + // Whether to compile in a background thread. + __ Push(masm->isolate()->factory()->ToBoolean(concurrent)); + + __ CallRuntime(Runtime::kHiddenCompileOptimized, 2); + // Restore receiver. + __ pop(edi); +} + + +void Builtins::Generate_CompileOptimized(MacroAssembler* masm) { + CallCompileOptimized(masm, false); + GenerateTailCallToReturnedCode(masm); +} + + +void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) { + CallCompileOptimized(masm, true); + GenerateTailCallToReturnedCode(masm); +} + + +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. + __ sub(Operand(esp, 0), Immediate(5)); + __ pushad(); + __ mov(eax, Operand(esp, 8 * kPointerSize)); + { + FrameScope scope(masm, StackFrame::MANUAL); + __ PrepareCallCFunction(2, ebx); + __ mov(Operand(esp, 1 * kPointerSize), + Immediate(ExternalReference::isolate_address(masm->isolate()))); + __ mov(Operand(esp, 0), eax); + __ CallCFunction( + ExternalReference::get_make_code_young_function(masm->isolate()), 2); + } + __ 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_MarkCodeAsExecutedOnce(MacroAssembler* masm) { + // For now, as in GenerateMakeCodeYoungAgainCommon, 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. + __ pushad(); + __ mov(eax, Operand(esp, 8 * kPointerSize)); + __ sub(eax, Immediate(Assembler::kCallInstructionLength)); + { // NOLINT + FrameScope scope(masm, StackFrame::MANUAL); + __ PrepareCallCFunction(2, ebx); + __ mov(Operand(esp, 1 * kPointerSize), + Immediate(ExternalReference::isolate_address(masm->isolate()))); + __ mov(Operand(esp, 0), eax); + __ CallCFunction( + ExternalReference::get_mark_code_as_executed_function(masm->isolate()), + 2); + } + __ popad(); + + // Perform prologue operations usually performed by the young code stub. + __ pop(eax); // Pop return address into scratch register. + __ push(ebp); // Caller's frame pointer. + __ mov(ebp, esp); + __ push(esi); // Callee's context. + __ push(edi); // Callee's JS Function. + __ push(eax); // Push return address after frame prologue. + + // Jump to point after the code-age stub. + __ ret(0); +} + + +void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) { + GenerateMakeCodeYoungAgainCommon(masm); +} + + +static void Generate_NotifyStubFailureHelper(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::kHiddenNotifyStubFailure, 0); + __ popad(); + // Tear down internal frame. + } + + __ pop(MemOperand(esp, 0)); // Ignore state offset + __ ret(0); // Return to IC Miss stub, continuation still on stack. +} + + +void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) { + Generate_NotifyStubFailureHelper(masm); +} + + +void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) { + // SaveDoubles is meanless for X87, just used by deoptimizer.cc + Generate_NotifyStubFailureHelper(masm); +} + + +static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, + Deoptimizer::BailoutType type) { + { + FrameScope scope(masm, StackFrame::INTERNAL); + + // Pass deoptimization type to the runtime system. + __ push(Immediate(Smi::FromInt(static_cast<int>(type)))); + __ CallRuntime(Runtime::kHiddenNotifyDeoptimized, 1); + + // Tear down internal frame. + } + + // Get the full codegen state from the stack and untag it. + __ mov(ecx, Operand(esp, 1 * kPointerSize)); + __ SmiUntag(ecx); + + // Switch on the state. + Label not_no_registers, not_tos_eax; + __ cmp(ecx, FullCodeGenerator::NO_REGISTERS); + __ j(not_equal, ¬_no_registers, Label::kNear); + __ ret(1 * kPointerSize); // Remove state. + + __ bind(¬_no_registers); + __ mov(eax, Operand(esp, 2 * kPointerSize)); + __ cmp(ecx, FullCodeGenerator::TOS_REG); + __ j(not_equal, ¬_tos_eax, Label::kNear); + __ ret(2 * kPointerSize); // Remove state, eax. + + __ bind(¬_tos_eax); + __ 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) { + Factory* factory = masm->isolate()->factory(); + + // 1. Make sure we have at least one argument. + { Label done; + __ test(eax, eax); + __ j(not_zero, &done); + __ pop(ebx); + __ push(Immediate(factory->undefined_value())); + __ push(ebx); + __ inc(eax); + __ bind(&done); + } + + // 2. Get the function to call (passed as receiver) from the stack, check + // if it is a function. + Label slow, non_function; + // 1 ~ return address. + __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize)); + __ JumpIfSmi(edi, &non_function); + __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); + __ j(not_equal, &slow); + + + // 3a. Patch the first argument if necessary when calling a function. + Label shift_arguments; + __ Move(edx, Immediate(0)); // indicate regular JS_FUNCTION + { Label convert_to_object, use_global_receiver, patch_receiver; + // Change context eagerly in case we need the global receiver. + __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); + + // Do not transform the receiver for strict mode functions. + __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); + __ test_b(FieldOperand(ebx, SharedFunctionInfo::kStrictModeByteOffset), + 1 << SharedFunctionInfo::kStrictModeBitWithinByte); + __ j(not_equal, &shift_arguments); + + // Do not transform the receiver for natives (shared already in ebx). + __ test_b(FieldOperand(ebx, SharedFunctionInfo::kNativeByteOffset), + 1 << SharedFunctionInfo::kNativeBitWithinByte); + __ j(not_equal, &shift_arguments); + + // Compute the receiver in sloppy mode. + __ mov(ebx, Operand(esp, eax, times_4, 0)); // First argument. + + // Call ToObject on the receiver if it is not an object, or use the + // global object if it is null or undefined. + __ JumpIfSmi(ebx, &convert_to_object); + __ cmp(ebx, factory->null_value()); + __ j(equal, &use_global_receiver); + __ cmp(ebx, factory->undefined_value()); + __ j(equal, &use_global_receiver); + STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); + __ CmpObjectType(ebx, FIRST_SPEC_OBJECT_TYPE, ecx); + __ j(above_equal, &shift_arguments); + + __ bind(&convert_to_object); + + { // In order to preserve argument count. + FrameScope scope(masm, StackFrame::INTERNAL); + __ SmiTag(eax); + __ push(eax); + + __ push(ebx); + __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); + __ mov(ebx, eax); + __ Move(edx, Immediate(0)); // restore + + __ pop(eax); + __ SmiUntag(eax); + } + + // Restore the function to edi. + __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize)); + __ jmp(&patch_receiver); + + __ bind(&use_global_receiver); + __ mov(ebx, + Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); + __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); + + __ bind(&patch_receiver); + __ mov(Operand(esp, eax, times_4, 0), ebx); + + __ jmp(&shift_arguments); + } + + // 3b. Check for function proxy. + __ bind(&slow); + __ Move(edx, Immediate(1)); // indicate function proxy + __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE); + __ j(equal, &shift_arguments); + __ bind(&non_function); + __ Move(edx, Immediate(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. + __ mov(Operand(esp, eax, times_4, 0), edi); + + // 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; + __ mov(ecx, eax); + __ bind(&loop); + __ mov(ebx, Operand(esp, ecx, times_4, 0)); + __ mov(Operand(esp, ecx, times_4, kPointerSize), ebx); + __ dec(ecx); + __ j(not_sign, &loop); // While non-negative (to copy return address). + __ pop(ebx); // Discard copy of return address. + __ dec(eax); // 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; + __ test(edx, edx); + __ j(zero, &function); + __ Move(ebx, Immediate(0)); + __ cmp(edx, Immediate(1)); + __ j(not_equal, &non_proxy); + + __ pop(edx); // return address + __ push(edi); // re-add proxy object as additional argument + __ push(edx); + __ inc(eax); + __ GetBuiltinEntry(edx, Builtins::CALL_FUNCTION_PROXY); + __ jmp(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), + RelocInfo::CODE_TARGET); + + __ bind(&non_proxy); + __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); + __ jmp(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. + __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); + __ mov(ebx, + FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset)); + __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset)); + __ SmiUntag(ebx); + __ cmp(eax, ebx); + __ j(not_equal, + masm->isolate()->builtins()->ArgumentsAdaptorTrampoline()); + + ParameterCount expected(0); + __ InvokeCode(edx, expected, expected, JUMP_FUNCTION, NullCallWrapper()); +} + + +void Builtins::Generate_FunctionApply(MacroAssembler* masm) { + static const int kArgumentsOffset = 2 * kPointerSize; + static const int kReceiverOffset = 3 * kPointerSize; + static const int kFunctionOffset = 4 * kPointerSize; + { + FrameScope frame_scope(masm, StackFrame::INTERNAL); + + __ push(Operand(ebp, kFunctionOffset)); // push this + __ push(Operand(ebp, kArgumentsOffset)); // push arguments + __ 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; + ExternalReference real_stack_limit = + ExternalReference::address_of_real_stack_limit(masm->isolate()); + __ mov(edi, Operand::StaticVariable(real_stack_limit)); + // Make ecx the space we have left. The stack might already be overflowed + // here which will cause ecx to become negative. + __ mov(ecx, esp); + __ sub(ecx, edi); + // Make edx the space we need for the array when it is unrolled onto the + // stack. + __ mov(edx, eax); + __ shl(edx, kPointerSizeLog2 - kSmiTagSize); + // Check if the arguments will overflow the stack. + __ cmp(ecx, edx); + __ j(greater, &okay); // Signed comparison. + + // Out of stack space. + __ push(Operand(ebp, 4 * kPointerSize)); // push this + __ push(eax); + __ InvokeBuiltin(Builtins::STACK_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(eax); // limit + __ push(Immediate(0)); // index + + // Get the receiver. + __ mov(ebx, Operand(ebp, kReceiverOffset)); + + // Check that the function is a JS function (otherwise it must be a proxy). + Label push_receiver, use_global_receiver; + __ mov(edi, Operand(ebp, kFunctionOffset)); + __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); + __ j(not_equal, &push_receiver); + + // Change context eagerly to get the right global object if necessary. + __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); + + // Compute the receiver. + // Do not transform the receiver for strict mode functions. + Label call_to_object; + __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); + __ test_b(FieldOperand(ecx, SharedFunctionInfo::kStrictModeByteOffset), + 1 << SharedFunctionInfo::kStrictModeBitWithinByte); + __ j(not_equal, &push_receiver); + + Factory* factory = masm->isolate()->factory(); + + // Do not transform the receiver for natives (shared already in ecx). + __ test_b(FieldOperand(ecx, SharedFunctionInfo::kNativeByteOffset), + 1 << SharedFunctionInfo::kNativeBitWithinByte); + __ j(not_equal, &push_receiver); + + // Compute the receiver in sloppy mode. + // Call ToObject on the receiver if it is not an object, or use the + // global object if it is null or undefined. + __ JumpIfSmi(ebx, &call_to_object); + __ cmp(ebx, factory->null_value()); + __ j(equal, &use_global_receiver); + __ cmp(ebx, factory->undefined_value()); + __ j(equal, &use_global_receiver); + STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); + __ CmpObjectType(ebx, FIRST_SPEC_OBJECT_TYPE, ecx); + __ j(above_equal, &push_receiver); + + __ bind(&call_to_object); + __ push(ebx); + __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); + __ mov(ebx, eax); + __ jmp(&push_receiver); + + __ bind(&use_global_receiver); + __ mov(ebx, + Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); + __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); + + // Push the receiver. + __ bind(&push_receiver); + __ push(ebx); + + // Copy all arguments from the array to the stack. + Label entry, loop; + __ mov(ecx, Operand(ebp, kIndexOffset)); + __ jmp(&entry); + __ bind(&loop); + __ mov(edx, Operand(ebp, 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(eax); + + // Update the index on the stack and in register eax. + __ mov(ecx, Operand(ebp, kIndexOffset)); + __ add(ecx, Immediate(1 << kSmiTagSize)); + __ mov(Operand(ebp, kIndexOffset), ecx); + + __ bind(&entry); + __ cmp(ecx, Operand(ebp, kLimitOffset)); + __ j(not_equal, &loop); + + // Call the function. + Label call_proxy; + __ mov(eax, ecx); + ParameterCount actual(eax); + __ SmiUntag(eax); + __ mov(edi, Operand(ebp, kFunctionOffset)); + __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); + __ j(not_equal, &call_proxy); + __ InvokeFunction(edi, actual, CALL_FUNCTION, NullCallWrapper()); + + frame_scope.GenerateLeaveFrame(); + __ ret(3 * kPointerSize); // remove this, receiver, and arguments + + // Call the function proxy. + __ bind(&call_proxy); + __ push(edi); // add function proxy as last argument + __ inc(eax); + __ Move(ebx, Immediate(0)); + __ GetBuiltinEntry(edx, 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 ------------- + // -- eax : argc + // -- esp[0] : return address + // -- esp[4] : last argument + // ----------------------------------- + Label generic_array_code; + + // Get the InternalArray function. + __ LoadGlobalFunction(Context::INTERNAL_ARRAY_FUNCTION_INDEX, edi); + + if (FLAG_debug_code) { + // Initial map for the builtin InternalArray function should be a map. + __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); + // Will both indicate a NULL and a Smi. + __ test(ebx, Immediate(kSmiTagMask)); + __ Assert(not_zero, kUnexpectedInitialMapForInternalArrayFunction); + __ CmpObjectType(ebx, MAP_TYPE, ecx); + __ Assert(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 ------------- + // -- eax : argc + // -- esp[0] : return address + // -- esp[4] : last argument + // ----------------------------------- + Label generic_array_code; + + // Get the Array function. + __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, edi); + + if (FLAG_debug_code) { + // Initial map for the builtin Array function should be a map. + __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); + // Will both indicate a NULL and a Smi. + __ test(ebx, Immediate(kSmiTagMask)); + __ Assert(not_zero, kUnexpectedInitialMapForArrayFunction); + __ CmpObjectType(ebx, MAP_TYPE, ecx); + __ Assert(equal, kUnexpectedInitialMapForArrayFunction); + } + + // Run the native code for the Array function called as a normal function. + // tail call a stub + __ mov(ebx, masm->isolate()->factory()->undefined_value()); + ArrayConstructorStub stub(masm->isolate()); + __ TailCallStub(&stub); +} + + +void Builtins::Generate_StringConstructCode(MacroAssembler* masm) { + // ----------- S t a t e ------------- + // -- eax : number of arguments + // -- edi : constructor function + // -- esp[0] : return address + // -- esp[(argc - n) * 4] : arg[n] (zero-based) + // -- esp[(argc + 1) * 4] : receiver + // ----------------------------------- + Counters* counters = masm->isolate()->counters(); + __ IncrementCounter(counters->string_ctor_calls(), 1); + + if (FLAG_debug_code) { + __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, ecx); + __ cmp(edi, ecx); + __ Assert(equal, kUnexpectedStringFunction); + } + + // Load the first argument into eax and get rid of the rest + // (including the receiver). + Label no_arguments; + __ test(eax, eax); + __ j(zero, &no_arguments); + __ mov(ebx, Operand(esp, eax, times_pointer_size, 0)); + __ pop(ecx); + __ lea(esp, Operand(esp, eax, times_pointer_size, kPointerSize)); + __ push(ecx); + __ mov(eax, ebx); + + // Lookup the argument in the number to string cache. + Label not_cached, argument_is_string; + __ LookupNumberStringCache(eax, // Input. + ebx, // Result. + ecx, // Scratch 1. + edx, // Scratch 2. + ¬_cached); + __ IncrementCounter(counters->string_ctor_cached_number(), 1); + __ bind(&argument_is_string); + // ----------- S t a t e ------------- + // -- ebx : argument converted to string + // -- edi : constructor function + // -- esp[0] : return address + // ----------------------------------- + + // Allocate a JSValue and put the tagged pointer into eax. + Label gc_required; + __ Allocate(JSValue::kSize, + eax, // Result. + ecx, // New allocation top (we ignore it). + no_reg, + &gc_required, + TAG_OBJECT); + + // Set the map. + __ LoadGlobalFunctionInitialMap(edi, ecx); + if (FLAG_debug_code) { + __ cmpb(FieldOperand(ecx, Map::kInstanceSizeOffset), + JSValue::kSize >> kPointerSizeLog2); + __ Assert(equal, kUnexpectedStringWrapperInstanceSize); + __ cmpb(FieldOperand(ecx, Map::kUnusedPropertyFieldsOffset), 0); + __ Assert(equal, kUnexpectedUnusedPropertiesOfStringWrapper); + } + __ mov(FieldOperand(eax, HeapObject::kMapOffset), ecx); + + // Set properties and elements. + Factory* factory = masm->isolate()->factory(); + __ Move(ecx, Immediate(factory->empty_fixed_array())); + __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ecx); + __ mov(FieldOperand(eax, JSObject::kElementsOffset), ecx); + + // Set the value. + __ mov(FieldOperand(eax, JSValue::kValueOffset), ebx); + + // 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(eax, &convert_argument); + Condition is_string = masm->IsObjectStringType(eax, ebx, ecx); + __ j(NegateCondition(is_string), &convert_argument); + __ mov(ebx, eax); + __ IncrementCounter(counters->string_ctor_string_value(), 1); + __ jmp(&argument_is_string); + + // Invoke the conversion builtin and put the result into ebx. + __ bind(&convert_argument); + __ IncrementCounter(counters->string_ctor_conversions(), 1); + { + FrameScope scope(masm, StackFrame::INTERNAL); + __ push(edi); // Preserve the function. + __ push(eax); + __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION); + __ pop(edi); + } + __ mov(ebx, eax); + __ jmp(&argument_is_string); + + // Load the empty string into ebx, remove the receiver from the + // stack, and jump back to the case where the argument is a string. + __ bind(&no_arguments); + __ Move(ebx, Immediate(factory->empty_string())); + __ pop(ecx); + __ lea(esp, Operand(esp, kPointerSize)); + __ push(ecx); + __ 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(ebx); + __ CallRuntime(Runtime::kNewStringWrapper, 1); + } + __ ret(0); +} + + +static void ArgumentsAdaptorStackCheck(MacroAssembler* masm, + Label* stack_overflow) { + // ----------- S t a t e ------------- + // -- eax : actual number of arguments + // -- ebx : expected number of arguments + // -- edi : function (passed through to callee) + // ----------------------------------- + // 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. + ExternalReference real_stack_limit = + ExternalReference::address_of_real_stack_limit(masm->isolate()); + __ mov(edx, Operand::StaticVariable(real_stack_limit)); + // Make ecx the space we have left. The stack might already be overflowed + // here which will cause ecx to become negative. + __ mov(ecx, esp); + __ sub(ecx, edx); + // Make edx the space we need for the array when it is unrolled onto the + // stack. + __ mov(edx, ebx); + __ shl(edx, kPointerSizeLog2); + // Check if the arguments will overflow the stack. + __ cmp(ecx, edx); + __ j(less_equal, stack_overflow); // Signed comparison. +} + + +static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { + __ push(ebp); + __ mov(ebp, esp); + + // Store the arguments adaptor context sentinel. + __ push(Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); + + // Push the function on the stack. + __ push(edi); + + // Preserve the number of arguments on the stack. Must preserve eax, + // ebx and ecx because these registers are used when copying the + // arguments and the receiver. + STATIC_ASSERT(kSmiTagSize == 1); + __ lea(edi, Operand(eax, eax, times_1, kSmiTag)); + __ push(edi); +} + + +static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { + // Retrieve the number of arguments from the stack. + __ mov(ebx, Operand(ebp, ArgumentsAdaptorFrameConstants::kLengthOffset)); + + // Leave the frame. + __ leave(); + + // Remove caller arguments from the stack. + STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); + __ pop(ecx); + __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver + __ push(ecx); +} + + +void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { + // ----------- S t a t e ------------- + // -- eax : actual number of arguments + // -- ebx : expected number of arguments + // -- edi : function (passed through to callee) + // ----------------------------------- + + Label invoke, dont_adapt_arguments; + __ IncrementCounter(masm->isolate()->counters()->arguments_adaptors(), 1); + + Label stack_overflow; + ArgumentsAdaptorStackCheck(masm, &stack_overflow); + + Label enough, too_few; + __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset)); + __ cmp(eax, ebx); + __ j(less, &too_few); + __ cmp(ebx, 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(eax, Operand(ebp, eax, times_4, offset)); + __ mov(edi, -1); // account for receiver + + Label copy; + __ bind(©); + __ inc(edi); + __ push(Operand(eax, 0)); + __ sub(eax, Immediate(kPointerSize)); + __ cmp(edi, ebx); + __ 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(edi, Operand(ebp, eax, times_4, offset)); + // ebx = expected - actual. + __ sub(ebx, eax); + // eax = -actual - 1 + __ neg(eax); + __ sub(eax, Immediate(1)); + + Label copy; + __ bind(©); + __ inc(eax); + __ push(Operand(edi, 0)); + __ sub(edi, Immediate(kPointerSize)); + __ test(eax, eax); + __ j(not_zero, ©); + + // Fill remaining expected arguments with undefined values. + Label fill; + __ bind(&fill); + __ inc(eax); + __ push(Immediate(masm->isolate()->factory()->undefined_value())); + __ cmp(eax, ebx); + __ j(less, &fill); + } + + // Call the entry point. + __ bind(&invoke); + // Restore function pointer. + __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); + __ call(edx); + + // 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(edx); + + __ bind(&stack_overflow); + { + FrameScope frame(masm, StackFrame::MANUAL); + EnterArgumentsAdaptorFrame(masm); + __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION); + __ int3(); + } +} + + +void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { + // Lookup the function in the JavaScript frame. + __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); + { + FrameScope scope(masm, StackFrame::INTERNAL); + // Pass function as argument. + __ push(eax); + __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1); + } + + Label skip; + // If the code object is null, just return to the unoptimized code. + __ cmp(eax, Immediate(0)); + __ j(not_equal, &skip, Label::kNear); + __ ret(0); + + __ bind(&skip); + + // Load deoptimization data from the code object. + __ mov(ebx, Operand(eax, Code::kDeoptimizationDataOffset - kHeapObjectTag)); + + // Load the OSR entrypoint offset from the deoptimization data. + __ mov(ebx, Operand(ebx, FixedArray::OffsetOfElementAt( + DeoptimizationInputData::kOsrPcOffsetIndex) - kHeapObjectTag)); + __ SmiUntag(ebx); + + // Compute the target address = code_obj + header_size + osr_offset + __ lea(eax, Operand(eax, ebx, times_1, Code::kHeaderSize - kHeapObjectTag)); + + // Overwrite the return address on the stack. + __ mov(Operand(esp, 0), eax); + + // And "return" to the OSR entry point of the function. + __ ret(0); +} + + +void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) { + // We check the stack limit as indicator that recompilation might be done. + Label ok; + ExternalReference stack_limit = + ExternalReference::address_of_stack_limit(masm->isolate()); + __ cmp(esp, Operand::StaticVariable(stack_limit)); + __ j(above_equal, &ok, Label::kNear); + { + FrameScope scope(masm, StackFrame::INTERNAL); + __ CallRuntime(Runtime::kHiddenStackGuard, 0); + } + __ jmp(masm->isolate()->builtins()->OnStackReplacement(), + RelocInfo::CODE_TARGET); + + __ bind(&ok); + __ ret(0); +} + +#undef __ +} +} // namespace v8::internal + +#endif // V8_TARGET_ARCH_X87 |