76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LIBMEMUNREACHABLE_HEAP_WALKER_H_
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#define LIBMEMUNREACHABLE_HEAP_WALKER_H_
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#include "android-base/macros.h"
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#include "Allocator.h"
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// A range [begin, end)
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struct Range {
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uintptr_t begin;
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uintptr_t end;
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};
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// Comparator for Ranges that returns equivalence for overlapping ranges
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struct compare_range {
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bool operator()(const Range& a, const Range& b) const {
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return a.end <= b.begin;
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}
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};
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class HeapWalker {
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public:
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HeapWalker(Allocator<HeapWalker> allocator) : allocator_(allocator),
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allocations_(allocator), allocation_bytes_(0),
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roots_(allocator), root_vals_(allocator) {
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valid_allocations_range_.end = 0;
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valid_allocations_range_.begin = ~valid_allocations_range_.end;
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}
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~HeapWalker() {}
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bool Allocation(uintptr_t begin, uintptr_t end);
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void Root(uintptr_t begin, uintptr_t end);
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void Root(const allocator::vector<uintptr_t>& vals);
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bool DetectLeaks();
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bool Leaked(allocator::vector<Range>&, size_t limit, size_t* num_leaks,
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size_t* leak_bytes);
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size_t Allocations();
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size_t AllocationBytes();
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private:
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struct RangeInfo {
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bool referenced_from_root;
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bool referenced_from_leak;
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};
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void Walk(const Range& range, bool RangeInfo::* flag);
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DISALLOW_COPY_AND_ASSIGN(HeapWalker);
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Allocator<HeapWalker> allocator_;
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using RangeMap = allocator::map<RangeInfo, Range, compare_range>;
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RangeMap allocations_;
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size_t allocation_bytes_;
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Range valid_allocations_range_;
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allocator::vector<Range> roots_;
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allocator::vector<uintptr_t> root_vals_;
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};
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#endif
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