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![Ryan Macnak](/assets/img/avatar_default.png)
Currently we have things called XPtr which are not what you get from ptr().
Old world:
handle->raw() returns RawObject* (tagged)
raw_obj->ptr() returns RawObject* (untagged)
After 6fe15f6df9
:
handle->raw() returns ObjectPtr
obj_ptr->ptr() returns ObjectLayout*
New world:
handle->ptr() returns ObjectPtr
obj_ptr->untag() returns UntaggedObject*
TEST=ci
Change-Id: I6c7f34014cf20737607caaf84979838300d12df2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149367
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
126 lines
3.2 KiB
C++
126 lines
3.2 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_OBJECT_SET_H_
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#define RUNTIME_VM_OBJECT_SET_H_
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#include "platform/utils.h"
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#include "vm/bit_vector.h"
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#include "vm/globals.h"
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#include "vm/raw_object.h"
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#include "vm/zone.h"
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namespace dart {
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class ObjectSetRegion : public ZoneAllocated {
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public:
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ObjectSetRegion(Zone* zone, uword start, uword end)
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: start_(start),
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end_(end),
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bit_vector_(zone, (end - start) >> kWordSizeLog2) {}
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bool ContainsAddress(uword address) const {
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return address >= start_ && address < end_;
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}
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intptr_t IndexForAddress(uword address) const {
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ASSERT(Utils::IsAligned(address, kWordSize));
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return (address - start_) >> kWordSizeLog2;
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}
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void AddObject(uword address) { bit_vector_.Add(IndexForAddress(address)); }
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bool ContainsObject(uword address) const {
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return bit_vector_.Contains(IndexForAddress(address));
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}
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uword start() const { return start_; }
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uword end() const { return end_; }
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private:
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uword start_;
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uword end_;
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BitVector bit_vector_;
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};
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class ObjectSet : public ZoneAllocated {
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public:
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explicit ObjectSet(Zone* zone) : zone_(zone), sorted_(true), regions_() {}
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void AddRegion(uword start, uword end) {
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if (start == end) {
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return; // Ignore empty regions, such as semispaces in the vm-isolate.
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}
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ASSERT(start < end);
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ObjectSetRegion* region = new (zone_) ObjectSetRegion(zone_, start, end);
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regions_.Add(region);
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sorted_ = false;
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}
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void SortRegions() {
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regions_.Sort(CompareRegions);
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sorted_ = true;
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}
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bool Contains(ObjectPtr raw_obj) const {
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uword raw_addr = UntaggedObject::ToAddr(raw_obj);
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ObjectSetRegion* region;
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if (FindRegion(raw_addr, ®ion)) {
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return region->ContainsObject(raw_addr);
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}
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return false;
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}
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void Add(ObjectPtr raw_obj) {
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uword raw_addr = UntaggedObject::ToAddr(raw_obj);
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ObjectSetRegion* region;
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if (FindRegion(raw_addr, ®ion)) {
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return region->AddObject(raw_addr);
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}
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FATAL("Address not in any heap region");
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}
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private:
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static int CompareRegions(ObjectSetRegion* const* a,
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ObjectSetRegion* const* b) {
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const uword a_start = (*a)->start();
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const uword b_start = (*b)->start();
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if (a_start < b_start) {
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return -1;
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} else if (a_start == b_start) {
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return 0;
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} else {
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return 1;
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}
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}
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bool FindRegion(uword addr, ObjectSetRegion** region) const {
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ASSERT(sorted_);
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intptr_t lo = 0;
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intptr_t hi = regions_.length() - 1;
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while (lo <= hi) {
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const intptr_t mid = (hi - lo + 1) / 2 + lo;
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ASSERT(mid >= lo);
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ASSERT(mid <= hi);
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*region = regions_[mid];
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if (addr < (*region)->start()) {
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hi = mid - 1;
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} else if (addr >= (*region)->end()) {
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lo = mid + 1;
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} else {
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return true;
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}
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}
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return false;
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}
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Zone* zone_;
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bool sorted_;
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GrowableArray<ObjectSetRegion*> regions_;
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};
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} // namespace dart
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#endif // RUNTIME_VM_OBJECT_SET_H_
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