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Issue 9178014: Revert 10413-10416 initial memory use reduction due to (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 8 years, 11 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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605 ASSERT_EQ(kLargeCode, space_index); 605 ASSERT_EQ(kLargeCode, space_index);
606 new_allocation = 606 new_allocation =
607 lo_space->AllocateRaw(size, EXECUTABLE)->ToObjectUnchecked(); 607 lo_space->AllocateRaw(size, EXECUTABLE)->ToObjectUnchecked();
608 } 608 }
609 HeapObject* new_object = HeapObject::cast(new_allocation); 609 HeapObject* new_object = HeapObject::cast(new_allocation);
610 // Record all large objects in the same space. 610 // Record all large objects in the same space.
611 address = new_object->address(); 611 address = new_object->address();
612 pages_[LO_SPACE].Add(address); 612 pages_[LO_SPACE].Add(address);
613 } 613 }
614 last_object_address_ = address; 614 last_object_address_ = address;
615 ASSERT(address >= Page::FromAddress(address)->ObjectAreaStart());
616 return address; 615 return address;
617 } 616 }
618 617
619 618
620 // This returns the address of an object that has been described in the 619 // This returns the address of an object that has been described in the
621 // snapshot as being offset bytes back in a particular space. 620 // snapshot as being offset bytes back in a particular space.
622 HeapObject* Deserializer::GetAddressFromEnd(int space) { 621 HeapObject* Deserializer::GetAddressFromEnd(int space) {
623 int offset = source_->GetInt(); 622 int offset = source_->GetInt();
624 ASSERT(!SpaceIsLarge(space)); 623 ASSERT(!SpaceIsLarge(space));
625 offset <<= kObjectAlignmentBits; 624 offset <<= kObjectAlignmentBits;
626 Address address = high_water_[space] - offset; 625 return HeapObject::FromAddress(high_water_[space] - offset);
627 // This assert will fail if kMinimumSpaceSizes is too small for a space,
628 // because we rely on the fact that all allocation is linear when the VM
629 // is very young.
630 ASSERT(address >= Page::FromAddress(address)->ObjectAreaStart());
631 return HeapObject::FromAddress(address);
632 } 626 }
633 627
634 628
635 // This returns the address of an object that has been described in the 629 // This returns the address of an object that has been described in the
636 // snapshot as being offset bytes into a particular space. 630 // snapshot as being offset bytes into a particular space.
637 HeapObject* Deserializer::GetAddressFromStart(int space) { 631 HeapObject* Deserializer::GetAddressFromStart(int space) {
638 int offset = source_->GetInt(); 632 int offset = source_->GetInt();
639 if (SpaceIsLarge(space)) { 633 if (SpaceIsLarge(space)) {
640 // Large spaces have one object per 'page'. 634 // Large spaces have one object per 'page'.
641 return HeapObject::FromAddress(pages_[LO_SPACE][offset]); 635 return HeapObject::FromAddress(pages_[LO_SPACE][offset]);
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1677 fullness_[space] = RoundUp(fullness_[space], Page::kPageSize); 1671 fullness_[space] = RoundUp(fullness_[space], Page::kPageSize);
1678 } 1672 }
1679 } 1673 }
1680 int allocation_address = fullness_[space]; 1674 int allocation_address = fullness_[space];
1681 fullness_[space] = allocation_address + size; 1675 fullness_[space] = allocation_address + size;
1682 return allocation_address; 1676 return allocation_address;
1683 } 1677 }
1684 1678
1685 1679
1686 } } // namespace v8::internal 1680 } } // namespace v8::internal
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