109 lines
3.0 KiB
C++
109 lines
3.0 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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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <android-base/unique_fd.h>
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#include <procinfo/process_map.h>
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#include <algorithm>
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#include <cctype>
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#include <memory>
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#include <string>
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#include <vector>
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#include <unwindstack/Elf.h>
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#include <unwindstack/Maps.h>
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#include <unwindstack/Memory.h>
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namespace unwindstack {
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MapInfo* Maps::Find(uint64_t pc) {
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if (maps_.empty()) {
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return nullptr;
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}
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size_t first = 0;
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size_t last = maps_.size();
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while (first < last) {
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size_t index = (first + last) / 2;
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MapInfo* cur = maps_[index];
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if (pc >= cur->start && pc < cur->end) {
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return cur;
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} else if (pc < cur->start) {
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last = index;
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} else {
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first = index + 1;
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}
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}
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return nullptr;
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}
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bool Maps::Parse() {
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return android::procinfo::ReadMapFile(
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GetMapsFile(),
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[&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, const char* name) {
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// Mark a device map in /dev/ and not in /dev/ashmem/ specially.
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if (strncmp(name, "/dev/", 5) == 0 && strncmp(name + 5, "ashmem/", 7) != 0) {
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flags |= unwindstack::MAPS_FLAGS_DEVICE_MAP;
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}
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maps_.push_back(new MapInfo(start, end, pgoff, flags, name));
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});
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}
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void Maps::Add(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
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const std::string& name, uint64_t load_bias) {
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MapInfo* map_info = new MapInfo(start, end, offset, flags, name);
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map_info->load_bias = load_bias;
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maps_.push_back(map_info);
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}
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void Maps::Sort() {
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std::sort(maps_.begin(), maps_.end(),
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[](const MapInfo* a, const MapInfo* b) { return a->start < b->start; });
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}
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Maps::~Maps() {
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for (auto& map : maps_) {
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delete map;
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}
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}
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bool BufferMaps::Parse() {
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std::string content(buffer_);
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return android::procinfo::ReadMapFileContent(
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&content[0],
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[&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, const char* name) {
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// Mark a device map in /dev/ and not in /dev/ashmem/ specially.
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if (strncmp(name, "/dev/", 5) == 0 && strncmp(name + 5, "ashmem/", 7) != 0) {
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flags |= unwindstack::MAPS_FLAGS_DEVICE_MAP;
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}
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maps_.push_back(new MapInfo(start, end, pgoff, flags, name));
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});
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}
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const std::string RemoteMaps::GetMapsFile() const {
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return "/proc/" + std::to_string(pid_) + "/maps";
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}
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} // namespace unwindstack
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