/*
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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 <string.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 "ProcessMappings.h"
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namespace android {
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struct ReadMapCallback {
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ReadMapCallback(allocator::vector<Mapping>& mappings) : mappings_(mappings) {}
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void operator()(uint64_t start, uint64_t end, uint16_t flags, uint64_t, ino_t,
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const char* name) const {
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mappings_.emplace_back(start, end, flags & PROT_READ, flags & PROT_WRITE, flags & PROT_EXEC,
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name);
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}
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allocator::vector<Mapping>& mappings_;
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};
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bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings) {
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char map_buffer[1024];
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snprintf(map_buffer, sizeof(map_buffer), "/proc/%d/maps", pid);
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android::base::unique_fd fd(open(map_buffer, O_RDONLY));
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if (fd == -1) {
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return false;
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}
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allocator::string content(mappings.get_allocator());
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ssize_t n;
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while ((n = TEMP_FAILURE_RETRY(read(fd, map_buffer, sizeof(map_buffer)))) > 0) {
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content.append(map_buffer, n);
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}
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ReadMapCallback callback(mappings);
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return android::procinfo::ReadMapFileContent(&content[0], callback);
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}
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} // namespace android
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