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Issue 2255004: Cardmarking writebarrier. (Closed)
Patch Set: Created 10 years, 6 months ago
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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. 1 // Copyright 2006-2009 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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219 no_reg, 219 no_reg,
220 &undo_allocation, 220 &undo_allocation,
221 RESULT_CONTAINS_TOP); 221 RESULT_CONTAINS_TOP);
222 222
223 // Initialize the FixedArray. 223 // Initialize the FixedArray.
224 // ebx: JSObject 224 // ebx: JSObject
225 // edi: FixedArray 225 // edi: FixedArray
226 // edx: number of elements 226 // edx: number of elements
227 // ecx: start of next object 227 // ecx: start of next object
228 __ mov(eax, Factory::fixed_array_map()); 228 __ mov(eax, Factory::fixed_array_map());
229 __ mov(Operand(edi, JSObject::kMapOffset), eax); // setup the map 229 __ mov(Operand(edi, FixedArray::kMapOffset), eax); // setup the map
230 __ mov(Operand(edi, Array::kLengthOffset), edx); // and length 230 __ SmiTag(edx);
231 __ mov(Operand(edi, FixedArray::kLengthOffset), edx); // and length
231 232
232 // Initialize the fields to undefined. 233 // Initialize the fields to undefined.
233 // ebx: JSObject 234 // ebx: JSObject
234 // edi: FixedArray 235 // edi: FixedArray
235 // ecx: start of next object 236 // ecx: start of next object
236 { Label loop, entry; 237 { Label loop, entry;
237 __ mov(edx, Factory::undefined_value()); 238 __ mov(edx, Factory::undefined_value());
238 __ lea(eax, Operand(edi, FixedArray::kHeaderSize)); 239 __ lea(eax, Operand(edi, FixedArray::kHeaderSize));
239 __ jmp(&entry); 240 __ jmp(&entry);
240 __ bind(&loop); 241 __ bind(&loop);
(...skipping 300 matching lines...) Expand 10 before | Expand all | Expand 10 after
541 RelocInfo::CODE_TARGET); 542 RelocInfo::CODE_TARGET);
542 __ bind(&function); 543 __ bind(&function);
543 } 544 }
544 545
545 // 5b. Get the code to call from the function and check that the number of 546 // 5b. Get the code to call from the function and check that the number of
546 // expected arguments matches what we're providing. If so, jump 547 // expected arguments matches what we're providing. If so, jump
547 // (tail-call) to the code in register edx without checking arguments. 548 // (tail-call) to the code in register edx without checking arguments.
548 __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); 549 __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
549 __ mov(ebx, 550 __ mov(ebx,
550 FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset)); 551 FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
552 __ SmiUntag(ebx);
551 __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); 553 __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset));
552 __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); 554 __ lea(edx, FieldOperand(edx, Code::kHeaderSize));
553 __ cmp(eax, Operand(ebx)); 555 __ cmp(eax, Operand(ebx));
554 __ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline))); 556 __ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline)));
555 557
556 ParameterCount expected(0); 558 ParameterCount expected(0);
557 __ InvokeCode(Operand(edx), expected, expected, JUMP_FUNCTION); 559 __ InvokeCode(Operand(edx), expected, expected, JUMP_FUNCTION);
558 } 560 }
559 561
560 562
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745 return; 747 return;
746 } 748 }
747 749
748 // Calculate the location of the elements array and set elements array member 750 // Calculate the location of the elements array and set elements array member
749 // of the JSArray. 751 // of the JSArray.
750 // result: JSObject 752 // result: JSObject
751 // scratch2: start of next object 753 // scratch2: start of next object
752 __ lea(scratch1, Operand(result, JSArray::kSize)); 754 __ lea(scratch1, Operand(result, JSArray::kSize));
753 __ mov(FieldOperand(result, JSArray::kElementsOffset), scratch1); 755 __ mov(FieldOperand(result, JSArray::kElementsOffset), scratch1);
754 756
755 // Initialize the FixedArray and fill it with holes. FixedArray length is not 757 // Initialize the FixedArray and fill it with holes. FixedArray length is
756 // stored as a smi. 758 // stored as a smi.
757 // result: JSObject 759 // result: JSObject
758 // scratch1: elements array 760 // scratch1: elements array
759 // scratch2: start of next object 761 // scratch2: start of next object
760 __ mov(FieldOperand(scratch1, JSObject::kMapOffset), 762 __ mov(FieldOperand(scratch1, FixedArray::kMapOffset),
761 Factory::fixed_array_map()); 763 Factory::fixed_array_map());
762 __ mov(FieldOperand(scratch1, Array::kLengthOffset), 764 __ mov(FieldOperand(scratch1, FixedArray::kLengthOffset),
763 Immediate(initial_capacity)); 765 Immediate(Smi::FromInt(initial_capacity)));
764 766
765 // Fill the FixedArray with the hole value. Inline the code if short. 767 // Fill the FixedArray with the hole value. Inline the code if short.
766 // Reconsider loop unfolding if kPreallocatedArrayElements gets changed. 768 // Reconsider loop unfolding if kPreallocatedArrayElements gets changed.
767 static const int kLoopUnfoldLimit = 4; 769 static const int kLoopUnfoldLimit = 4;
768 ASSERT(kPreallocatedArrayElements <= kLoopUnfoldLimit); 770 ASSERT(kPreallocatedArrayElements <= kLoopUnfoldLimit);
769 if (initial_capacity <= kLoopUnfoldLimit) { 771 if (initial_capacity <= kLoopUnfoldLimit) {
770 // Use a scratch register here to have only one reloc info when unfolding 772 // Use a scratch register here to have only one reloc info when unfolding
771 // the loop. 773 // the loop.
772 __ mov(scratch3, Factory::the_hole_value()); 774 __ mov(scratch3, Factory::the_hole_value());
773 for (int i = 0; i < initial_capacity; i++) { 775 for (int i = 0; i < initial_capacity; i++) {
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840 __ mov(FieldOperand(result, JSArray::kLengthOffset), array_size); 842 __ mov(FieldOperand(result, JSArray::kLengthOffset), array_size);
841 843
842 // Calculate the location of the elements array and set elements array member 844 // Calculate the location of the elements array and set elements array member
843 // of the JSArray. 845 // of the JSArray.
844 // result: JSObject 846 // result: JSObject
845 // elements_array_end: start of next object 847 // elements_array_end: start of next object
846 // array_size: size of array (smi) 848 // array_size: size of array (smi)
847 __ lea(elements_array, Operand(result, JSArray::kSize)); 849 __ lea(elements_array, Operand(result, JSArray::kSize));
848 __ mov(FieldOperand(result, JSArray::kElementsOffset), elements_array); 850 __ mov(FieldOperand(result, JSArray::kElementsOffset), elements_array);
849 851
850 // Initialize the fixed array. FixedArray length is not stored as a smi. 852 // Initialize the fixed array. FixedArray length is stored as a smi.
851 // result: JSObject 853 // result: JSObject
852 // elements_array: elements array 854 // elements_array: elements array
853 // elements_array_end: start of next object 855 // elements_array_end: start of next object
854 // array_size: size of array (smi) 856 // array_size: size of array (smi)
855 ASSERT(kSmiTag == 0); 857 __ mov(FieldOperand(elements_array, FixedArray::kMapOffset),
856 __ SmiUntag(array_size); // Convert from smi to value.
857 __ mov(FieldOperand(elements_array, JSObject::kMapOffset),
858 Factory::fixed_array_map()); 858 Factory::fixed_array_map());
859 // For non-empty JSArrays the length of the FixedArray and the JSArray is the 859 // For non-empty JSArrays the length of the FixedArray and the JSArray is the
860 // same. 860 // same.
861 __ mov(FieldOperand(elements_array, Array::kLengthOffset), array_size); 861 __ mov(FieldOperand(elements_array, FixedArray::kLengthOffset), array_size);
862 862
863 // Fill the allocated FixedArray with the hole value if requested. 863 // Fill the allocated FixedArray with the hole value if requested.
864 // result: JSObject 864 // result: JSObject
865 // elements_array: elements array 865 // elements_array: elements array
866 if (fill_with_hole) { 866 if (fill_with_hole) {
867 __ SmiUntag(array_size);
867 __ lea(edi, Operand(elements_array, 868 __ lea(edi, Operand(elements_array,
868 FixedArray::kHeaderSize - kHeapObjectTag)); 869 FixedArray::kHeaderSize - kHeapObjectTag));
869 __ mov(eax, Factory::the_hole_value()); 870 __ mov(eax, Factory::the_hole_value());
870 __ cld(); 871 __ cld();
871 // Do not use rep stos when filling less than kRepStosThreshold 872 // Do not use rep stos when filling less than kRepStosThreshold
872 // words. 873 // words.
873 const int kRepStosThreshold = 16; 874 const int kRepStosThreshold = 16;
874 Label loop, entry, done; 875 Label loop, entry, done;
875 __ cmp(ecx, kRepStosThreshold); 876 __ cmp(ecx, kRepStosThreshold);
876 __ j(below, &loop); // Note: ecx > 0. 877 __ j(below, &loop); // Note: ecx > 0.
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1253 __ bind(&dont_adapt_arguments); 1254 __ bind(&dont_adapt_arguments);
1254 __ jmp(Operand(edx)); 1255 __ jmp(Operand(edx));
1255 } 1256 }
1256 1257
1257 1258
1258 #undef __ 1259 #undef __
1259 1260
1260 } } // namespace v8::internal 1261 } } // namespace v8::internal
1261 1262
1262 #endif // V8_TARGET_ARCH_IA32 1263 #endif // V8_TARGET_ARCH_IA32
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