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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
#include <android-base/unique_fd.h>
#include <procinfo/process_map.h>
#include "ProcessMappings.h"
namespace android {
struct ReadMapCallback {
ReadMapCallback(allocator::vector<Mapping>& mappings) : mappings_(mappings) {}
void operator()(uint64_t start, uint64_t end, uint16_t flags, uint64_t, const char* name) const {
mappings_.emplace_back(start, end, flags & PROT_READ, flags & PROT_WRITE, flags & PROT_EXEC,
name);
}
allocator::vector<Mapping>& mappings_;
};
bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings) {
char map_buffer[1024];
snprintf(map_buffer, sizeof(map_buffer), "/proc/%d/maps", pid);
android::base::unique_fd fd(open(map_buffer, O_RDONLY));
if (fd == -1) {
return false;
}
allocator::string content(mappings.get_allocator());
ssize_t n;
while ((n = TEMP_FAILURE_RETRY(read(fd, map_buffer, sizeof(map_buffer)))) > 0) {
content.append(map_buffer, n);
}
ReadMapCallback callback(mappings);
return android::procinfo::ReadMapFileContent(&content[0], callback);
}
} // namespace android
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