675e711f1c
- New сardmarking write barrier handles large objects and normal objects in a similar fashion (no more additional space for pointer tracking is required, no conditional branches in WB code). - Changes to enable oldspaces iteration without maps decoding: -- layout change for FixedArrays: length is stored as a smis (initial patch by Kevin Millikin) -- layout change for SharedFunctionInfo: integer fields are stored as smi on arm, ia32 and rearranged on x64. -- layout change for String: meaning of LSB bit is fliped (1 now means hash not computed); on x64 padding is added. -- layout of maps is _not_ changed. Map space is currently iterated in a special way. Review URL: http://codereview.chromium.org/2144006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4715 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1264 lines
44 KiB
C++
1264 lines
44 KiB
C++
// Copyright 2006-2009 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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#if defined(V8_TARGET_ARCH_IA32)
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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,
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CFunctionId id,
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BuiltinExtraArguments extra_args) {
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// ----------- S t a t e -------------
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// -- eax : number of arguments excluding receiver
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// -- edi : called function (only guaranteed when
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// extra_args requires it)
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// -- esi : context
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// -- esp[0] : return address
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// -- esp[4] : last argument
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// -- ...
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// -- esp[4 * argc] : first argument (argc == eax)
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// -- esp[4 * (argc +1)] : receiver
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// -----------------------------------
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// Insert extra arguments.
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int num_extra_args = 0;
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if (extra_args == NEEDS_CALLED_FUNCTION) {
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num_extra_args = 1;
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Register scratch = ebx;
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__ pop(scratch); // Save return address.
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__ push(edi);
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__ push(scratch); // Restore return address.
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} else {
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ASSERT(extra_args == NO_EXTRA_ARGUMENTS);
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}
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// JumpToExternalReference expects eax to contain the number of arguments
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// including the receiver and the extra arguments.
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__ add(Operand(eax), Immediate(num_extra_args + 1));
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__ JumpToExternalReference(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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// Jump to the function-specific construct stub.
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__ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
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__ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kConstructStubOffset));
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__ lea(ebx, FieldOperand(ebx, Code::kHeaderSize));
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__ jmp(Operand(ebx));
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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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// CALL_NON_FUNCTION expects the non-function constructor as receiver
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// (instead of the original receiver from the call site). The receiver is
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// stack element argc+1.
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__ mov(Operand(esp, eax, times_4, kPointerSize), edi);
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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_JSConstructStubHelper(MacroAssembler* masm,
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bool is_api_function) {
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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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__ SmiTag(eax);
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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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__ AllocateInNewSpace(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS);
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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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// Add the object tag to make the JSObject real, so that we can continue and
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// jump into the continuation code at any time from now on. Any failures
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// need to undo the allocation, so that the heap is in a consistent state
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// 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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// Check if a non-empty properties array is needed.
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// Allocate and initialize a FixedArray if it is.
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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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// Calculate the total number of properties described by the map.
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__ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset));
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__ movzx_b(ecx, FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset));
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__ add(edx, Operand(ecx));
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// Calculate unused properties past the end of the in-object properties.
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__ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset));
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__ sub(edx, Operand(ecx));
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// Done if no extra properties are to be allocated.
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__ j(zero, &allocated);
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__ Assert(positive, "Property allocation count failed.");
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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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// 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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__ AllocateInNewSpace(FixedArray::kHeaderSize,
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times_pointer_size,
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edx,
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edi,
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ecx,
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no_reg,
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&undo_allocation,
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RESULT_CONTAINS_TOP);
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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, FixedArray::kMapOffset), eax); // setup the map
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__ SmiTag(edx);
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__ mov(Operand(edi, FixedArray::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(below, &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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__ UndoAllocationInNewSpace(ebx);
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}
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// Allocate the new receiver object using the runtime call.
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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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// edi: function (constructor)
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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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__ SmiUntag(eax);
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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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if (is_api_function) {
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__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
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Handle<Code> code = Handle<Code>(
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Builtins::builtin(Builtins::HandleApiCallConstruct));
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ParameterCount expected(0);
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__ InvokeCode(code, expected, expected,
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RelocInfo::CODE_TARGET, CALL_FUNCTION);
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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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// 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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__ IncrementCounter(&Counters::constructed_objects, 1);
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__ ret(0);
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}
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void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
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Generate_JSConstructStubHelper(masm, false);
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}
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void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
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Generate_JSConstructStubHelper(masm, true);
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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 (passed as receiver) from the stack, check
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// if it is a function.
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Label non_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(not_equal, &non_function, not_taken);
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// 3a. Patch the first argument if necessary when calling a function.
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Label shift_arguments;
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{ Label convert_to_object, use_global_receiver, patch_receiver;
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// Change context eagerly in case we need the global receiver.
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__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
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__ mov(ebx, Operand(esp, eax, times_4, 0)); // First argument.
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__ test(ebx, Immediate(kSmiTagMask));
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__ j(zero, &convert_to_object);
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|
|
__ cmp(ebx, Factory::null_value());
|
|
__ j(equal, &use_global_receiver);
|
|
__ cmp(ebx, Factory::undefined_value());
|
|
__ j(equal, &use_global_receiver);
|
|
|
|
__ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset));
|
|
__ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset));
|
|
__ cmp(ecx, FIRST_JS_OBJECT_TYPE);
|
|
__ j(below, &convert_to_object);
|
|
__ cmp(ecx, LAST_JS_OBJECT_TYPE);
|
|
__ j(below_equal, &shift_arguments);
|
|
|
|
__ bind(&convert_to_object);
|
|
__ EnterInternalFrame(); // In order to preserve argument count.
|
|
__ SmiTag(eax);
|
|
__ push(eax);
|
|
|
|
__ push(ebx);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ mov(ebx, eax);
|
|
|
|
__ pop(eax);
|
|
__ SmiUntag(eax);
|
|
__ LeaveInternalFrame();
|
|
// Restore the function to edi.
|
|
__ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize));
|
|
__ jmp(&patch_receiver);
|
|
|
|
// Use the global receiver object from the called function as the
|
|
// receiver.
|
|
__ bind(&use_global_receiver);
|
|
const int kGlobalIndex =
|
|
Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
|
|
__ mov(ebx, FieldOperand(esi, kGlobalIndex));
|
|
__ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalContextOffset));
|
|
__ mov(ebx, FieldOperand(ebx, kGlobalIndex));
|
|
__ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
|
|
|
|
__ bind(&patch_receiver);
|
|
__ mov(Operand(esp, eax, times_4, 0), ebx);
|
|
|
|
__ jmp(&shift_arguments);
|
|
}
|
|
|
|
// 3b. 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.
|
|
__ bind(&non_function);
|
|
__ mov(Operand(esp, eax, times_4, 0), edi);
|
|
// Clear edi to indicate a non-function being called.
|
|
__ xor_(edi, Operand(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.
|
|
{ Label function;
|
|
__ test(edi, Operand(edi));
|
|
__ j(not_zero, &function, taken);
|
|
__ xor_(ebx, Operand(ebx));
|
|
__ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION);
|
|
__ jmp(Handle<Code>(builtin(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));
|
|
__ SmiUntag(ebx);
|
|
__ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset));
|
|
__ lea(edx, FieldOperand(edx, Code::kHeaderSize));
|
|
__ cmp(eax, Operand(ebx));
|
|
__ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline)));
|
|
|
|
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);
|
|
|
|
// Check the stack for overflow. We are not trying need 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();
|
|
__ 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, 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);
|
|
// Check if the arguments will overflow the stack.
|
|
__ cmp(ecx, Operand(edx));
|
|
__ j(greater, &okay, taken); // Signed comparison.
|
|
|
|
// Out of stack space.
|
|
__ push(Operand(ebp, 4 * kPointerSize)); // push this
|
|
__ push(eax);
|
|
__ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION);
|
|
__ bind(&okay);
|
|
// End of stack check.
|
|
|
|
// Push current index and limit.
|
|
const int kLimitOffset =
|
|
StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize;
|
|
const int kIndexOffset = kLimitOffset - 1 * kPointerSize;
|
|
__ push(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::kGlobalContextOffset));
|
|
__ mov(ebx, FieldOperand(ebx, 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(edx, Operand(ebp, 2 * kPointerSize)); // load arguments
|
|
|
|
// 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.
|
|
|
|
// Push the nth argument.
|
|
__ 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);
|
|
__ SmiUntag(eax);
|
|
__ mov(edi, Operand(ebp, 4 * kPointerSize));
|
|
__ InvokeFunction(edi, actual, CALL_FUNCTION);
|
|
|
|
__ LeaveInternalFrame();
|
|
__ ret(3 * kPointerSize); // remove this, receiver, and arguments
|
|
}
|
|
|
|
|
|
// Load the built-in Array function from the current context.
|
|
static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) {
|
|
// Load the global context.
|
|
__ mov(result, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
|
|
__ mov(result, FieldOperand(result, GlobalObject::kGlobalContextOffset));
|
|
// Load the Array function from the global context.
|
|
__ mov(result,
|
|
Operand(result, Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX)));
|
|
}
|
|
|
|
|
|
// Number of empty elements to allocate for an empty array.
|
|
static const int kPreallocatedArrayElements = 4;
|
|
|
|
|
|
// Allocate an empty JSArray. The allocated array is put into the result
|
|
// register. If the parameter initial_capacity is larger than zero an elements
|
|
// backing store is allocated with this size and filled with the hole values.
|
|
// Otherwise the elements backing store is set to the empty FixedArray.
|
|
static void AllocateEmptyJSArray(MacroAssembler* masm,
|
|
Register array_function,
|
|
Register result,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Register scratch3,
|
|
int initial_capacity,
|
|
Label* gc_required) {
|
|
ASSERT(initial_capacity >= 0);
|
|
|
|
// Load the initial map from the array function.
|
|
__ mov(scratch1, FieldOperand(array_function,
|
|
JSFunction::kPrototypeOrInitialMapOffset));
|
|
|
|
// Allocate the JSArray object together with space for a fixed array with the
|
|
// requested elements.
|
|
int size = JSArray::kSize;
|
|
if (initial_capacity > 0) {
|
|
size += FixedArray::SizeFor(initial_capacity);
|
|
}
|
|
__ AllocateInNewSpace(size,
|
|
result,
|
|
scratch2,
|
|
scratch3,
|
|
gc_required,
|
|
TAG_OBJECT);
|
|
|
|
// Allocated the JSArray. Now initialize the fields except for the elements
|
|
// array.
|
|
// result: JSObject
|
|
// scratch1: initial map
|
|
// scratch2: start of next object
|
|
__ mov(FieldOperand(result, JSObject::kMapOffset), scratch1);
|
|
__ mov(FieldOperand(result, JSArray::kPropertiesOffset),
|
|
Factory::empty_fixed_array());
|
|
// Field JSArray::kElementsOffset is initialized later.
|
|
__ mov(FieldOperand(result, JSArray::kLengthOffset), Immediate(0));
|
|
|
|
// If no storage is requested for the elements array just set the empty
|
|
// fixed array.
|
|
if (initial_capacity == 0) {
|
|
__ mov(FieldOperand(result, JSArray::kElementsOffset),
|
|
Factory::empty_fixed_array());
|
|
return;
|
|
}
|
|
|
|
// Calculate the location of the elements array and set elements array member
|
|
// of the JSArray.
|
|
// result: JSObject
|
|
// scratch2: start of next object
|
|
__ lea(scratch1, Operand(result, JSArray::kSize));
|
|
__ mov(FieldOperand(result, JSArray::kElementsOffset), scratch1);
|
|
|
|
// Initialize the FixedArray and fill it with holes. FixedArray length is
|
|
// stored as a smi.
|
|
// result: JSObject
|
|
// scratch1: elements array
|
|
// scratch2: start of next object
|
|
__ mov(FieldOperand(scratch1, FixedArray::kMapOffset),
|
|
Factory::fixed_array_map());
|
|
__ mov(FieldOperand(scratch1, FixedArray::kLengthOffset),
|
|
Immediate(Smi::FromInt(initial_capacity)));
|
|
|
|
// Fill the FixedArray with the hole value. Inline the code if short.
|
|
// Reconsider loop unfolding if kPreallocatedArrayElements gets changed.
|
|
static const int kLoopUnfoldLimit = 4;
|
|
ASSERT(kPreallocatedArrayElements <= kLoopUnfoldLimit);
|
|
if (initial_capacity <= kLoopUnfoldLimit) {
|
|
// Use a scratch register here to have only one reloc info when unfolding
|
|
// the loop.
|
|
__ mov(scratch3, Factory::the_hole_value());
|
|
for (int i = 0; i < initial_capacity; i++) {
|
|
__ mov(FieldOperand(scratch1,
|
|
FixedArray::kHeaderSize + i * kPointerSize),
|
|
scratch3);
|
|
}
|
|
} else {
|
|
Label loop, entry;
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ mov(Operand(scratch1, 0), Factory::the_hole_value());
|
|
__ add(Operand(scratch1), Immediate(kPointerSize));
|
|
__ bind(&entry);
|
|
__ cmp(scratch1, Operand(scratch2));
|
|
__ j(below, &loop);
|
|
}
|
|
}
|
|
|
|
|
|
// Allocate a JSArray with the number of elements stored in a register. The
|
|
// register array_function holds the built-in Array function and the register
|
|
// array_size holds the size of the array as a smi. The allocated array is put
|
|
// into the result register and beginning and end of the FixedArray elements
|
|
// storage is put into registers elements_array and elements_array_end (see
|
|
// below for when that is not the case). If the parameter fill_with_holes is
|
|
// true the allocated elements backing store is filled with the hole values
|
|
// otherwise it is left uninitialized. When the backing store is filled the
|
|
// register elements_array is scratched.
|
|
static void AllocateJSArray(MacroAssembler* masm,
|
|
Register array_function, // Array function.
|
|
Register array_size, // As a smi, cannot be 0.
|
|
Register result,
|
|
Register elements_array,
|
|
Register elements_array_end,
|
|
Register scratch,
|
|
bool fill_with_hole,
|
|
Label* gc_required) {
|
|
ASSERT(scratch.is(edi)); // rep stos destination
|
|
ASSERT(!fill_with_hole || array_size.is(ecx)); // rep stos count
|
|
ASSERT(!fill_with_hole || !result.is(eax)); // result is never eax
|
|
|
|
// Load the initial map from the array function.
|
|
__ mov(elements_array,
|
|
FieldOperand(array_function,
|
|
JSFunction::kPrototypeOrInitialMapOffset));
|
|
|
|
// Allocate the JSArray object together with space for a FixedArray with the
|
|
// requested elements.
|
|
ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
|
|
__ AllocateInNewSpace(JSArray::kSize + FixedArray::kHeaderSize,
|
|
times_half_pointer_size, // array_size is a smi.
|
|
array_size,
|
|
result,
|
|
elements_array_end,
|
|
scratch,
|
|
gc_required,
|
|
TAG_OBJECT);
|
|
|
|
// Allocated the JSArray. Now initialize the fields except for the elements
|
|
// array.
|
|
// result: JSObject
|
|
// elements_array: initial map
|
|
// elements_array_end: start of next object
|
|
// array_size: size of array (smi)
|
|
__ mov(FieldOperand(result, JSObject::kMapOffset), elements_array);
|
|
__ mov(elements_array, Factory::empty_fixed_array());
|
|
__ mov(FieldOperand(result, JSArray::kPropertiesOffset), elements_array);
|
|
// Field JSArray::kElementsOffset is initialized later.
|
|
__ mov(FieldOperand(result, JSArray::kLengthOffset), array_size);
|
|
|
|
// Calculate the location of the elements array and set elements array member
|
|
// of the JSArray.
|
|
// result: JSObject
|
|
// elements_array_end: start of next object
|
|
// array_size: size of array (smi)
|
|
__ lea(elements_array, Operand(result, JSArray::kSize));
|
|
__ mov(FieldOperand(result, JSArray::kElementsOffset), elements_array);
|
|
|
|
// Initialize the fixed array. FixedArray length is stored as a smi.
|
|
// result: JSObject
|
|
// elements_array: elements array
|
|
// elements_array_end: start of next object
|
|
// array_size: size of array (smi)
|
|
__ mov(FieldOperand(elements_array, FixedArray::kMapOffset),
|
|
Factory::fixed_array_map());
|
|
// For non-empty JSArrays the length of the FixedArray and the JSArray is the
|
|
// same.
|
|
__ mov(FieldOperand(elements_array, FixedArray::kLengthOffset), array_size);
|
|
|
|
// Fill the allocated FixedArray with the hole value if requested.
|
|
// result: JSObject
|
|
// elements_array: elements array
|
|
if (fill_with_hole) {
|
|
__ SmiUntag(array_size);
|
|
__ lea(edi, Operand(elements_array,
|
|
FixedArray::kHeaderSize - kHeapObjectTag));
|
|
__ mov(eax, Factory::the_hole_value());
|
|
__ cld();
|
|
// Do not use rep stos when filling less than kRepStosThreshold
|
|
// words.
|
|
const int kRepStosThreshold = 16;
|
|
Label loop, entry, done;
|
|
__ cmp(ecx, kRepStosThreshold);
|
|
__ j(below, &loop); // Note: ecx > 0.
|
|
__ rep_stos();
|
|
__ jmp(&done);
|
|
__ bind(&loop);
|
|
__ stos();
|
|
__ bind(&entry);
|
|
__ cmp(edi, Operand(elements_array_end));
|
|
__ j(below, &loop);
|
|
__ bind(&done);
|
|
}
|
|
}
|
|
|
|
|
|
// Create a new array for the built-in Array function. This function allocates
|
|
// the JSArray object and the FixedArray elements array and initializes these.
|
|
// If the Array cannot be constructed in native code the runtime is called. This
|
|
// function assumes the following state:
|
|
// edi: constructor (built-in Array function)
|
|
// eax: argc
|
|
// esp[0]: return address
|
|
// esp[4]: last argument
|
|
// This function is used for both construct and normal calls of Array. Whether
|
|
// it is a construct call or not is indicated by the construct_call parameter.
|
|
// The only difference between handling a construct call and a normal call is
|
|
// that for a construct call the constructor function in edi needs to be
|
|
// preserved for entering the generic code. In both cases argc in eax needs to
|
|
// be preserved.
|
|
static void ArrayNativeCode(MacroAssembler* masm,
|
|
bool construct_call,
|
|
Label* call_generic_code) {
|
|
Label argc_one_or_more, argc_two_or_more, prepare_generic_code_call,
|
|
empty_array, not_empty_array;
|
|
|
|
// Push the constructor and argc. No need to tag argc as a smi, as there will
|
|
// be no garbage collection with this on the stack.
|
|
int push_count = 0;
|
|
if (construct_call) {
|
|
push_count++;
|
|
__ push(edi);
|
|
}
|
|
push_count++;
|
|
__ push(eax);
|
|
|
|
// Check for array construction with zero arguments.
|
|
__ test(eax, Operand(eax));
|
|
__ j(not_zero, &argc_one_or_more);
|
|
|
|
__ bind(&empty_array);
|
|
// Handle construction of an empty array.
|
|
AllocateEmptyJSArray(masm,
|
|
edi,
|
|
eax,
|
|
ebx,
|
|
ecx,
|
|
edi,
|
|
kPreallocatedArrayElements,
|
|
&prepare_generic_code_call);
|
|
__ IncrementCounter(&Counters::array_function_native, 1);
|
|
__ pop(ebx);
|
|
if (construct_call) {
|
|
__ pop(edi);
|
|
}
|
|
__ ret(kPointerSize);
|
|
|
|
// Check for one argument. Bail out if argument is not smi or if it is
|
|
// negative.
|
|
__ bind(&argc_one_or_more);
|
|
__ cmp(eax, 1);
|
|
__ j(not_equal, &argc_two_or_more);
|
|
ASSERT(kSmiTag == 0);
|
|
__ mov(ecx, Operand(esp, (push_count + 1) * kPointerSize));
|
|
__ test(ecx, Operand(ecx));
|
|
__ j(not_zero, ¬_empty_array);
|
|
|
|
// The single argument passed is zero, so we jump to the code above used to
|
|
// handle the case of no arguments passed. To adapt the stack for that we move
|
|
// the return address and the pushed constructor (if pushed) one stack slot up
|
|
// thereby removing the passed argument. Argc is also on the stack - at the
|
|
// bottom - and it needs to be changed from 1 to 0 to have the call into the
|
|
// runtime system work in case a GC is required.
|
|
for (int i = push_count; i > 0; i--) {
|
|
__ mov(eax, Operand(esp, i * kPointerSize));
|
|
__ mov(Operand(esp, (i + 1) * kPointerSize), eax);
|
|
}
|
|
__ add(Operand(esp), Immediate(2 * kPointerSize)); // Drop two stack slots.
|
|
__ push(Immediate(0)); // Treat this as a call with argc of zero.
|
|
__ jmp(&empty_array);
|
|
|
|
__ bind(¬_empty_array);
|
|
__ test(ecx, Immediate(kIntptrSignBit | kSmiTagMask));
|
|
__ j(not_zero, &prepare_generic_code_call);
|
|
|
|
// Handle construction of an empty array of a certain size. Get the size from
|
|
// the stack and bail out if size is to large to actually allocate an elements
|
|
// array.
|
|
__ cmp(ecx, JSObject::kInitialMaxFastElementArray << kSmiTagSize);
|
|
__ j(greater_equal, &prepare_generic_code_call);
|
|
|
|
// edx: array_size (smi)
|
|
// edi: constructor
|
|
// esp[0]: argc (cannot be 0 here)
|
|
// esp[4]: constructor (only if construct_call)
|
|
// esp[8]: return address
|
|
// esp[C]: argument
|
|
AllocateJSArray(masm,
|
|
edi,
|
|
ecx,
|
|
ebx,
|
|
eax,
|
|
edx,
|
|
edi,
|
|
true,
|
|
&prepare_generic_code_call);
|
|
__ IncrementCounter(&Counters::array_function_native, 1);
|
|
__ mov(eax, ebx);
|
|
__ pop(ebx);
|
|
if (construct_call) {
|
|
__ pop(edi);
|
|
}
|
|
__ ret(2 * kPointerSize);
|
|
|
|
// Handle construction of an array from a list of arguments.
|
|
__ bind(&argc_two_or_more);
|
|
ASSERT(kSmiTag == 0);
|
|
__ SmiTag(eax); // Convet argc to a smi.
|
|
// eax: array_size (smi)
|
|
// edi: constructor
|
|
// esp[0] : argc
|
|
// esp[4]: constructor (only if construct_call)
|
|
// esp[8] : return address
|
|
// esp[C] : last argument
|
|
AllocateJSArray(masm,
|
|
edi,
|
|
eax,
|
|
ebx,
|
|
ecx,
|
|
edx,
|
|
edi,
|
|
false,
|
|
&prepare_generic_code_call);
|
|
__ IncrementCounter(&Counters::array_function_native, 1);
|
|
__ mov(eax, ebx);
|
|
__ pop(ebx);
|
|
if (construct_call) {
|
|
__ pop(edi);
|
|
}
|
|
__ push(eax);
|
|
// eax: JSArray
|
|
// ebx: argc
|
|
// edx: elements_array_end (untagged)
|
|
// esp[0]: JSArray
|
|
// esp[4]: return address
|
|
// esp[8]: last argument
|
|
|
|
// Location of the last argument
|
|
__ lea(edi, Operand(esp, 2 * kPointerSize));
|
|
|
|
// Location of the first array element (Parameter fill_with_holes to
|
|
// AllocateJSArrayis false, so the FixedArray is returned in ecx).
|
|
__ lea(edx, Operand(ecx, FixedArray::kHeaderSize - kHeapObjectTag));
|
|
|
|
// ebx: argc
|
|
// edx: location of the first array element
|
|
// edi: location of the last argument
|
|
// esp[0]: JSArray
|
|
// esp[4]: return address
|
|
// esp[8]: last argument
|
|
Label loop, entry;
|
|
__ mov(ecx, ebx);
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ mov(eax, Operand(edi, ecx, times_pointer_size, 0));
|
|
__ mov(Operand(edx, 0), eax);
|
|
__ add(Operand(edx), Immediate(kPointerSize));
|
|
__ bind(&entry);
|
|
__ dec(ecx);
|
|
__ j(greater_equal, &loop);
|
|
|
|
// Remove caller arguments from the stack and return.
|
|
// ebx: argc
|
|
// esp[0]: JSArray
|
|
// esp[4]: return address
|
|
// esp[8]: last argument
|
|
__ pop(eax);
|
|
__ pop(ecx);
|
|
__ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize));
|
|
__ push(ecx);
|
|
__ ret(0);
|
|
|
|
// Restore argc and constructor before running the generic code.
|
|
__ bind(&prepare_generic_code_call);
|
|
__ pop(eax);
|
|
if (construct_call) {
|
|
__ pop(edi);
|
|
}
|
|
__ jmp(call_generic_code);
|
|
}
|
|
|
|
|
|
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.
|
|
GenerateLoadArrayFunction(masm, edi);
|
|
|
|
if (FLAG_debug_code) {
|
|
// Initial map for the builtin Array function shoud be a map.
|
|
__ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
|
|
// Will both indicate a NULL and a Smi.
|
|
__ test(ebx, Immediate(kSmiTagMask));
|
|
__ Assert(not_zero, "Unexpected initial map for Array function");
|
|
__ CmpObjectType(ebx, MAP_TYPE, ecx);
|
|
__ Assert(equal, "Unexpected initial map for Array function");
|
|
}
|
|
|
|
// Run the native code for the Array function called as a normal function.
|
|
ArrayNativeCode(masm, false, &generic_array_code);
|
|
|
|
// Jump to the generic array code in case the specialized code cannot handle
|
|
// the construction.
|
|
__ bind(&generic_array_code);
|
|
Code* code = Builtins::builtin(Builtins::ArrayCodeGeneric);
|
|
Handle<Code> array_code(code);
|
|
__ jmp(array_code, RelocInfo::CODE_TARGET);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) {
|
|
// ----------- S t a t e -------------
|
|
// -- eax : argc
|
|
// -- edi : constructor
|
|
// -- esp[0] : return address
|
|
// -- esp[4] : last argument
|
|
// -----------------------------------
|
|
Label generic_constructor;
|
|
|
|
if (FLAG_debug_code) {
|
|
// The array construct code is only set for the builtin Array function which
|
|
// does always have a map.
|
|
GenerateLoadArrayFunction(masm, ebx);
|
|
__ cmp(edi, Operand(ebx));
|
|
__ Assert(equal, "Unexpected Array function");
|
|
// 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, "Unexpected initial map for Array function");
|
|
__ CmpObjectType(ebx, MAP_TYPE, ecx);
|
|
__ Assert(equal, "Unexpected initial map for Array function");
|
|
}
|
|
|
|
// Run the native code for the Array function called as constructor.
|
|
ArrayNativeCode(masm, true, &generic_constructor);
|
|
|
|
// Jump to the generic construct code in case the specialized code cannot
|
|
// handle the construction.
|
|
__ bind(&generic_constructor);
|
|
Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
|
|
Handle<Code> generic_construct_stub(code);
|
|
__ jmp(generic_construct_stub, RelocInfo::CODE_TARGET);
|
|
}
|
|
|
|
|
|
static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
|
|
__ push(ebp);
|
|
__ mov(ebp, Operand(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 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
|
|
|
|
#endif // V8_TARGET_ARCH_IA32
|