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771 lines
26 KiB
771 lines
26 KiB
// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen-inl.h"
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namespace v8 {
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namespace internal {
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#define __ ACCESS_MASM(masm)
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void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id) {
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// TODO(1238487): Don't pass the function in a static variable.
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ExternalReference passed = ExternalReference::builtin_passed_function();
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__ mov(Operand::StaticVariable(passed), edi);
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// The actual argument count has already been loaded into register
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// eax, but JumpToBuiltin expects eax to contain the number of
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// arguments including the receiver.
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__ inc(eax);
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__ JumpToBuiltin(ExternalReference(id));
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}
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void Builtins::Generate_JSConstructCall(MacroAssembler* masm) {
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// ----------- S t a t e -------------
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// -- eax: number of arguments
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// -- edi: constructor function
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// -----------------------------------
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Label non_function_call;
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// Check that function is not a smi.
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__ test(edi, Immediate(kSmiTagMask));
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__ j(zero, &non_function_call);
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// Check that function is a JSFunction.
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__ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
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__ j(not_equal, &non_function_call);
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// Enter a construct frame.
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__ EnterConstructFrame();
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// Store a smi-tagged arguments count on the stack.
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__ shl(eax, kSmiTagSize);
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__ push(eax);
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// Push the function to invoke on the stack.
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__ push(edi);
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// Try to allocate the object without transitioning into C code. If any of the
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// preconditions is not met, the code bails out to the runtime call.
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Label rt_call, allocated;
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if (FLAG_inline_new) {
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Label undo_allocation;
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#ifdef ENABLE_DEBUGGER_SUPPORT
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ExternalReference debug_step_in_fp =
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ExternalReference::debug_step_in_fp_address();
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__ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0));
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__ j(not_equal, &rt_call);
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#endif
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// Verified that the constructor is a JSFunction.
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// Load the initial map and verify that it is in fact a map.
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// edi: constructor
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__ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
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// Will both indicate a NULL and a Smi
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__ test(eax, Immediate(kSmiTagMask));
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__ j(zero, &rt_call);
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// edi: constructor
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// eax: initial map (if proven valid below)
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__ CmpObjectType(eax, MAP_TYPE, ebx);
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__ j(not_equal, &rt_call);
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// Check that the constructor is not constructing a JSFunction (see comments
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// in Runtime_NewObject in runtime.cc). In which case the initial map's
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// instance type would be JS_FUNCTION_TYPE.
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// edi: constructor
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// eax: initial map
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__ CmpInstanceType(eax, JS_FUNCTION_TYPE);
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__ j(equal, &rt_call);
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// Now allocate the JSObject on the heap.
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// edi: constructor
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// eax: initial map
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__ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset));
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__ shl(edi, kPointerSizeLog2);
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// Make sure that the maximum heap object size will never cause us
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// problem here, because it is always greater than the maximum
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// instance size that can be represented in a byte.
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ASSERT(Heap::MaxHeapObjectSize() >= (1 << kBitsPerByte));
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ExternalReference new_space_allocation_top =
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ExternalReference::new_space_allocation_top_address();
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__ mov(ebx, Operand::StaticVariable(new_space_allocation_top));
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__ add(edi, Operand(ebx)); // Calculate new top
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ExternalReference new_space_allocation_limit =
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ExternalReference::new_space_allocation_limit_address();
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__ cmp(edi, Operand::StaticVariable(new_space_allocation_limit));
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__ j(greater_equal, &rt_call);
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// Allocated the JSObject, now initialize the fields.
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// eax: initial map
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// ebx: JSObject
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// edi: start of next object
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__ mov(Operand(ebx, JSObject::kMapOffset), eax);
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__ mov(ecx, Factory::empty_fixed_array());
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__ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx);
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__ mov(Operand(ebx, JSObject::kElementsOffset), ecx);
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// Set extra fields in the newly allocated object.
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// eax: initial map
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// ebx: JSObject
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// edi: start of next object
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{ Label loop, entry;
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__ mov(edx, Factory::undefined_value());
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__ lea(ecx, Operand(ebx, JSObject::kHeaderSize));
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__ jmp(&entry);
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__ bind(&loop);
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__ mov(Operand(ecx, 0), edx);
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__ add(Operand(ecx), Immediate(kPointerSize));
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__ bind(&entry);
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__ cmp(ecx, Operand(edi));
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__ j(less, &loop);
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}
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// Mostly done with the JSObject. Add the heap tag and store the new top, so
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// that we can continue and jump into the continuation code at any time from
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// now on. Any failures need to undo the setting of the new top, so that the
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// heap is in a consistent state and verifiable.
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// eax: initial map
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// ebx: JSObject
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// edi: start of next object
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__ or_(Operand(ebx), Immediate(kHeapObjectTag));
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__ mov(Operand::StaticVariable(new_space_allocation_top), edi);
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// Check if a properties array should be setup and allocate one if needed.
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// Otherwise initialize the properties to the empty_fixed_array as well.
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// eax: initial map
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// ebx: JSObject
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// edi: start of next object
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__ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset));
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__ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset));
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// Calculate unused properties past the end of the in-object properties.
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__ sub(edx, Operand(ecx));
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__ test(edx, Operand(edx));
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// Done if no extra properties are to be allocated.
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__ j(zero, &allocated);
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// Scale the number of elements by pointer size and add the header for
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// FixedArrays to the start of the next object calculation from above.
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// eax: initial map
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// ebx: JSObject
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// edi: start of next object (will be start of FixedArray)
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// edx: number of elements in properties array
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ASSERT(Heap::MaxHeapObjectSize() >
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(FixedArray::kHeaderSize + 255*kPointerSize));
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__ lea(ecx, Operand(edi, edx, times_4, FixedArray::kHeaderSize));
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__ cmp(ecx, Operand::StaticVariable(new_space_allocation_limit));
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__ j(greater_equal, &undo_allocation);
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__ mov(Operand::StaticVariable(new_space_allocation_top), ecx);
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// Initialize the FixedArray.
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// ebx: JSObject
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// edi: FixedArray
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// edx: number of elements
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// ecx: start of next object
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__ mov(eax, Factory::fixed_array_map());
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__ mov(Operand(edi, JSObject::kMapOffset), eax); // setup the map
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__ mov(Operand(edi, Array::kLengthOffset), edx); // and length
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// Initialize the fields to undefined.
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// ebx: JSObject
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// edi: FixedArray
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// ecx: start of next object
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{ Label loop, entry;
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__ mov(edx, Factory::undefined_value());
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__ lea(eax, Operand(edi, FixedArray::kHeaderSize));
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__ jmp(&entry);
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__ bind(&loop);
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__ mov(Operand(eax, 0), edx);
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__ add(Operand(eax), Immediate(kPointerSize));
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__ bind(&entry);
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__ cmp(eax, Operand(ecx));
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__ j(less, &loop);
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}
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// Store the initialized FixedArray into the properties field of
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// the JSObject
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// ebx: JSObject
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// edi: FixedArray
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__ or_(Operand(edi), Immediate(kHeapObjectTag)); // add the heap tag
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__ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi);
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// Continue with JSObject being successfully allocated
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// ebx: JSObject
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__ jmp(&allocated);
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// Undo the setting of the new top so that the heap is verifiable. For
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// example, the map's unused properties potentially do not match the
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// allocated objects unused properties.
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// ebx: JSObject (previous new top)
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__ bind(&undo_allocation);
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__ xor_(Operand(ebx), Immediate(kHeapObjectTag)); // clear the heap tag
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__ mov(Operand::StaticVariable(new_space_allocation_top), ebx);
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}
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// Allocate the new receiver object using the runtime call.
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// edi: function (constructor)
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__ bind(&rt_call);
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// Must restore edi (constructor) before calling runtime.
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__ mov(edi, Operand(esp, 0));
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__ push(edi);
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__ CallRuntime(Runtime::kNewObject, 1);
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__ mov(ebx, Operand(eax)); // store result in ebx
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// New object allocated.
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// ebx: newly allocated object
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__ bind(&allocated);
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// Retrieve the function from the stack.
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__ pop(edi);
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// Retrieve smi-tagged arguments count from the stack.
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__ mov(eax, Operand(esp, 0));
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__ shr(eax, kSmiTagSize);
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// Push the allocated receiver to the stack. We need two copies
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// because we may have to return the original one and the calling
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// conventions dictate that the called function pops the receiver.
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__ push(ebx);
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__ push(ebx);
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// Setup pointer to last argument.
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__ lea(ebx, Operand(ebp, StandardFrameConstants::kCallerSPOffset));
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// Copy arguments and receiver to the expression stack.
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Label loop, entry;
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__ mov(ecx, Operand(eax));
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__ jmp(&entry);
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__ bind(&loop);
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__ push(Operand(ebx, ecx, times_4, 0));
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__ bind(&entry);
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__ dec(ecx);
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__ j(greater_equal, &loop);
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// Call the function.
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ParameterCount actual(eax);
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__ InvokeFunction(edi, actual, CALL_FUNCTION);
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// Restore context from the frame.
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__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
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// If the result is an object (in the ECMA sense), we should get rid
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// of the receiver and use the result; see ECMA-262 section 13.2.2-7
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// on page 74.
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Label use_receiver, exit;
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// If the result is a smi, it is *not* an object in the ECMA sense.
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__ test(eax, Immediate(kSmiTagMask));
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__ j(zero, &use_receiver, not_taken);
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// If the type of the result (stored in its map) is less than
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// FIRST_JS_OBJECT_TYPE, it is not an object in the ECMA sense.
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__ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset));
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__ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset));
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__ cmp(ecx, FIRST_JS_OBJECT_TYPE);
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__ j(greater_equal, &exit, not_taken);
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// Throw away the result of the constructor invocation and use the
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// on-stack receiver as the result.
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__ bind(&use_receiver);
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__ mov(eax, Operand(esp, 0));
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// Restore the arguments count and leave the construct frame.
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__ bind(&exit);
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__ mov(ebx, Operand(esp, kPointerSize)); // get arguments count
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__ LeaveConstructFrame();
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// Remove caller arguments from the stack and return.
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ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
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__ pop(ecx);
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__ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver
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__ push(ecx);
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__ ret(0);
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// edi: called object
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// eax: number of arguments
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__ bind(&non_function_call);
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// Set expected number of arguments to zero (not changing eax).
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__ Set(ebx, Immediate(0));
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__ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR);
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__ jmp(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
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RelocInfo::CODE_TARGET);
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}
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static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
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bool is_construct) {
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// Clear the context before we push it when entering the JS frame.
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__ xor_(esi, Operand(esi)); // clear esi
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// Enter an internal frame.
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__ EnterInternalFrame();
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// Load the previous frame pointer (ebx) to access C arguments
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__ mov(ebx, Operand(ebp, 0));
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// Get the function from the frame and setup the context.
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__ mov(ecx, Operand(ebx, EntryFrameConstants::kFunctionArgOffset));
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__ mov(esi, FieldOperand(ecx, JSFunction::kContextOffset));
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// Push the function and the receiver onto the stack.
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__ push(ecx);
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__ push(Operand(ebx, EntryFrameConstants::kReceiverArgOffset));
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// Load the number of arguments and setup pointer to the arguments.
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__ mov(eax, Operand(ebx, EntryFrameConstants::kArgcOffset));
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__ mov(ebx, Operand(ebx, EntryFrameConstants::kArgvOffset));
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// Copy arguments to the stack in a loop.
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Label loop, entry;
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__ xor_(ecx, Operand(ecx)); // clear ecx
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__ jmp(&entry);
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__ bind(&loop);
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__ mov(edx, Operand(ebx, ecx, times_4, 0)); // push parameter from argv
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__ push(Operand(edx, 0)); // dereference handle
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__ inc(Operand(ecx));
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__ bind(&entry);
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__ cmp(ecx, Operand(eax));
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__ j(not_equal, &loop);
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// Get the function from the stack and call it.
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__ mov(edi, Operand(esp, eax, times_4, +1 * kPointerSize)); // +1 ~ receiver
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// Invoke the code.
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if (is_construct) {
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__ call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)),
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RelocInfo::CODE_TARGET);
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} else {
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ParameterCount actual(eax);
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__ InvokeFunction(edi, actual, CALL_FUNCTION);
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}
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// Exit the JS frame. Notice that this also removes the empty
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// context and the function left on the stack by the code
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// invocation.
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__ LeaveInternalFrame();
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__ ret(1 * kPointerSize); // remove receiver
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}
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void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
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Generate_JSEntryTrampolineHelper(masm, false);
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}
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void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
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Generate_JSEntryTrampolineHelper(masm, true);
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}
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void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
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// 1. Make sure we have at least one argument.
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{ Label done;
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__ test(eax, Operand(eax));
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__ j(not_zero, &done, taken);
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__ pop(ebx);
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__ push(Immediate(Factory::undefined_value()));
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__ push(ebx);
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__ inc(eax);
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__ bind(&done);
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}
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// 2. Get the function to call from the stack.
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{ Label done, non_function, function;
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// +1 ~ return address.
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__ mov(edi, Operand(esp, eax, times_4, +1 * kPointerSize));
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__ test(edi, Immediate(kSmiTagMask));
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__ j(zero, &non_function, not_taken);
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__ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
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__ j(equal, &function, taken);
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// Non-function called: Clear the function to force exception.
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__ bind(&non_function);
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__ xor_(edi, Operand(edi));
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__ jmp(&done);
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// Function called: Change context eagerly to get the right global object.
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__ bind(&function);
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__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
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__ bind(&done);
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}
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// 3. Make sure first argument is an object; convert if necessary.
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{ Label call_to_object, use_global_receiver, patch_receiver, done;
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__ mov(ebx, Operand(esp, eax, times_4, 0));
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__ test(ebx, Immediate(kSmiTagMask));
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__ j(zero, &call_to_object);
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__ cmp(ebx, Factory::null_value());
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__ j(equal, &use_global_receiver);
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__ cmp(ebx, Factory::undefined_value());
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__ j(equal, &use_global_receiver);
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__ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset));
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__ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset));
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__ cmp(ecx, FIRST_JS_OBJECT_TYPE);
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__ j(less, &call_to_object);
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__ cmp(ecx, LAST_JS_OBJECT_TYPE);
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__ j(less_equal, &done);
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__ bind(&call_to_object);
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__ EnterInternalFrame(); // preserves eax, ebx, edi
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// Store the arguments count on the stack (smi tagged).
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ASSERT(kSmiTag == 0);
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__ shl(eax, kSmiTagSize);
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__ push(eax);
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__ push(edi); // save edi across the call
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__ push(ebx);
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__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
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__ mov(ebx, eax);
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__ pop(edi); // restore edi after the call
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// Get the arguments count and untag it.
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__ pop(eax);
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__ shr(eax, kSmiTagSize);
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__ LeaveInternalFrame();
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__ jmp(&patch_receiver);
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// Use the global receiver object from the called function as the receiver.
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__ bind(&use_global_receiver);
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const int kGlobalIndex =
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Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
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__ mov(ebx, FieldOperand(esi, kGlobalIndex));
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__ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
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__ bind(&patch_receiver);
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__ mov(Operand(esp, eax, times_4, 0), ebx);
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__ bind(&done);
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|
}
|
|
|
|
// 4. Shift stuff one slot down the stack.
|
|
{ Label loop;
|
|
__ lea(ecx, Operand(eax, +1)); // +1 ~ copy receiver too
|
|
__ bind(&loop);
|
|
__ mov(ebx, Operand(esp, ecx, times_4, 0));
|
|
__ mov(Operand(esp, ecx, times_4, kPointerSize), ebx);
|
|
__ dec(ecx);
|
|
__ j(not_zero, &loop);
|
|
}
|
|
|
|
// 5. Remove TOS (copy of last arguments), but keep return address.
|
|
__ pop(ebx);
|
|
__ pop(ecx);
|
|
__ push(ebx);
|
|
__ dec(eax);
|
|
|
|
// 6. Check that function really was a function and get the code to
|
|
// call from the function and check that the number of expected
|
|
// arguments matches what we're providing.
|
|
{ Label invoke;
|
|
__ test(edi, Operand(edi));
|
|
__ j(not_zero, &invoke, taken);
|
|
__ xor_(ebx, Operand(ebx));
|
|
__ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION);
|
|
__ jmp(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
|
|
RelocInfo::CODE_TARGET);
|
|
|
|
__ bind(&invoke);
|
|
__ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
|
|
__ mov(ebx,
|
|
FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
|
|
__ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset));
|
|
__ lea(edx, FieldOperand(edx, Code::kHeaderSize));
|
|
__ cmp(eax, Operand(ebx));
|
|
__ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline)));
|
|
}
|
|
|
|
// 7. Jump (tail-call) to the code in register edx without checking arguments.
|
|
ParameterCount expected(0);
|
|
__ InvokeCode(Operand(edx), expected, expected, JUMP_FUNCTION);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
|
|
__ EnterInternalFrame();
|
|
|
|
__ push(Operand(ebp, 4 * kPointerSize)); // push this
|
|
__ push(Operand(ebp, 2 * kPointerSize)); // push arguments
|
|
__ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
|
|
|
|
if (FLAG_check_stack) {
|
|
// We need to catch preemptions right here, otherwise an unlucky preemption
|
|
// could show up as a failed apply.
|
|
ExternalReference stack_guard_limit =
|
|
ExternalReference::address_of_stack_guard_limit();
|
|
Label retry_preemption;
|
|
Label no_preemption;
|
|
__ bind(&retry_preemption);
|
|
__ mov(edi, Operand::StaticVariable(stack_guard_limit));
|
|
__ cmp(esp, Operand(edi));
|
|
__ j(above, &no_preemption, taken);
|
|
|
|
// Preemption!
|
|
// Because builtins always remove the receiver from the stack, we
|
|
// have to fake one to avoid underflowing the stack.
|
|
__ push(eax);
|
|
__ push(Immediate(Smi::FromInt(0)));
|
|
|
|
// Do call to runtime routine.
|
|
__ CallRuntime(Runtime::kStackGuard, 1);
|
|
__ pop(eax);
|
|
__ jmp(&retry_preemption);
|
|
|
|
__ bind(&no_preemption);
|
|
|
|
Label okay;
|
|
// Make ecx the space we have left.
|
|
__ mov(ecx, Operand(esp));
|
|
__ sub(ecx, Operand(edi));
|
|
// Make edx the space we need for the array when it is unrolled onto the
|
|
// stack.
|
|
__ mov(edx, Operand(eax));
|
|
__ shl(edx, kPointerSizeLog2 - kSmiTagSize);
|
|
__ cmp(ecx, Operand(edx));
|
|
__ j(greater, &okay, taken);
|
|
|
|
// Too bad: Out of stack space.
|
|
__ push(Operand(ebp, 4 * kPointerSize)); // push this
|
|
__ push(eax);
|
|
__ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION);
|
|
__ bind(&okay);
|
|
}
|
|
|
|
// 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
|
|
|
|
// Change context eagerly to get the right global object if
|
|
// necessary.
|
|
__ mov(edi, Operand(ebp, 4 * kPointerSize));
|
|
__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
|
|
|
|
// Compute the receiver.
|
|
Label call_to_object, use_global_receiver, push_receiver;
|
|
__ mov(ebx, Operand(ebp, 3 * kPointerSize));
|
|
__ test(ebx, Immediate(kSmiTagMask));
|
|
__ j(zero, &call_to_object);
|
|
__ cmp(ebx, Factory::null_value());
|
|
__ j(equal, &use_global_receiver);
|
|
__ cmp(ebx, Factory::undefined_value());
|
|
__ j(equal, &use_global_receiver);
|
|
|
|
// If given receiver is already a JavaScript object then there's no
|
|
// reason for converting it.
|
|
__ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset));
|
|
__ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset));
|
|
__ cmp(ecx, FIRST_JS_OBJECT_TYPE);
|
|
__ j(less, &call_to_object);
|
|
__ cmp(ecx, LAST_JS_OBJECT_TYPE);
|
|
__ j(less_equal, &push_receiver);
|
|
|
|
// Convert the receiver to an object.
|
|
__ bind(&call_to_object);
|
|
__ push(ebx);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ mov(ebx, Operand(eax));
|
|
__ jmp(&push_receiver);
|
|
|
|
// Use the current global receiver object as the receiver.
|
|
__ bind(&use_global_receiver);
|
|
const int kGlobalOffset =
|
|
Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
|
|
__ mov(ebx, FieldOperand(esi, kGlobalOffset));
|
|
__ 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(eax, Operand(ebp, kIndexOffset));
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ mov(ecx, Operand(ebp, 2 * kPointerSize)); // load arguments
|
|
__ push(ecx);
|
|
__ push(eax);
|
|
|
|
// Use inline caching to speed up access to arguments.
|
|
Handle<Code> ic(Builtins::builtin(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.
|
|
|
|
// Remove IC arguments from the stack and push the nth argument.
|
|
__ add(Operand(esp), Immediate(2 * kPointerSize));
|
|
__ push(eax);
|
|
|
|
// Update the index on the stack and in register eax.
|
|
__ mov(eax, Operand(ebp, kIndexOffset));
|
|
__ add(Operand(eax), Immediate(1 << kSmiTagSize));
|
|
__ mov(Operand(ebp, kIndexOffset), eax);
|
|
|
|
__ bind(&entry);
|
|
__ cmp(eax, Operand(ebp, kLimitOffset));
|
|
__ j(not_equal, &loop);
|
|
|
|
// Invoke the function.
|
|
ParameterCount actual(eax);
|
|
__ shr(eax, kSmiTagSize);
|
|
__ mov(edi, Operand(ebp, 4 * kPointerSize));
|
|
__ InvokeFunction(edi, actual, CALL_FUNCTION);
|
|
|
|
__ LeaveInternalFrame();
|
|
__ ret(3 * kPointerSize); // remove this, receiver, and arguments
|
|
}
|
|
|
|
|
|
static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
|
|
__ push(ebp);
|
|
__ mov(ebp, Operand(esp));
|
|
|
|
// Store the arguments adaptor context sentinel.
|
|
__ push(Immediate(ArgumentsAdaptorFrame::SENTINEL));
|
|
|
|
// Push the function on the stack.
|
|
__ push(edi);
|
|
|
|
// Preserve the number of arguments on the stack. Must preserve both
|
|
// eax and ebx because these registers are used when copying the
|
|
// arguments and the receiver.
|
|
ASSERT(kSmiTagSize == 1);
|
|
__ lea(ecx, Operand(eax, eax, times_1, kSmiTag));
|
|
__ push(ecx);
|
|
}
|
|
|
|
|
|
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.
|
|
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
|
|
// -- edx : code entry to call
|
|
// -----------------------------------
|
|
|
|
Label invoke, dont_adapt_arguments;
|
|
__ IncrementCounter(&Counters::arguments_adaptors, 1);
|
|
|
|
Label enough, too_few;
|
|
__ cmp(eax, Operand(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(ecx, -1); // account for receiver
|
|
|
|
Label copy;
|
|
__ bind(©);
|
|
__ inc(ecx);
|
|
__ push(Operand(eax, 0));
|
|
__ sub(Operand(eax), Immediate(kPointerSize));
|
|
__ cmp(ecx, Operand(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));
|
|
__ mov(ecx, -1); // account for receiver
|
|
|
|
Label copy;
|
|
__ bind(©);
|
|
__ inc(ecx);
|
|
__ push(Operand(edi, 0));
|
|
__ sub(Operand(edi), Immediate(kPointerSize));
|
|
__ cmp(ecx, Operand(eax));
|
|
__ j(less, ©);
|
|
|
|
// Fill remaining expected arguments with undefined values.
|
|
Label fill;
|
|
__ bind(&fill);
|
|
__ inc(ecx);
|
|
__ push(Immediate(Factory::undefined_value()));
|
|
__ cmp(ecx, Operand(ebx));
|
|
__ j(less, &fill);
|
|
|
|
// Restore function pointer.
|
|
__ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
|
|
}
|
|
|
|
// Call the entry point.
|
|
__ bind(&invoke);
|
|
__ call(Operand(edx));
|
|
|
|
// Leave frame and return.
|
|
LeaveArgumentsAdaptorFrame(masm);
|
|
__ ret(0);
|
|
|
|
// -------------------------------------------
|
|
// Dont adapt arguments.
|
|
// -------------------------------------------
|
|
__ bind(&dont_adapt_arguments);
|
|
__ jmp(Operand(edx));
|
|
}
|
|
|
|
|
|
#undef __
|
|
|
|
} } // namespace v8::internal
|
|
|