75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include <sys/cdefs.h>
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#include <mutex>
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#include <set>
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#include <string>
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#include <platform/bionic/macros.h>
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struct MapEntry {
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MapEntry(uintptr_t start, uintptr_t end, uintptr_t offset, const char* name, size_t name_len, int flags)
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: start(start), end(end), offset(offset), name(name, name_len), flags(flags) {}
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explicit MapEntry(uintptr_t pc) : start(pc), end(pc) {}
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uintptr_t start;
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uintptr_t end;
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uintptr_t offset;
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uintptr_t load_bias;
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uintptr_t elf_start_offset = 0;
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std::string name;
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int flags;
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bool init = false;
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bool valid = false;
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};
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// Ordering comparator that returns equivalence for overlapping entries
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struct compare_entries {
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bool operator()(const MapEntry* a, const MapEntry* b) const { return a->end <= b->start; }
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};
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class MapData {
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public:
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MapData() = default;
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~MapData();
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const MapEntry* find(uintptr_t pc, uintptr_t* rel_pc = nullptr);
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private:
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bool ReadMaps();
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std::mutex m_;
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std::set<MapEntry*, compare_entries> entries_;
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BIONIC_DISALLOW_COPY_AND_ASSIGN(MapData);
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};
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