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