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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PROCESS_MEMORY_STATS_H_
#define PROCESS_MEMORY_STATS_H_
#include <stdint.h>
#include <map>
#include <memory>
// Reads process memory stats from /proc/pid/{statm,smaps}.
class ProcessMemoryStats {
public:
struct MmapInfo {
char mapped_file[128] = {};
char prot_flags[5] = {};
uint64_t start_addr = 0;
uint64_t end_addr = 0;
uint64_t virt_kb = 0;
uint64_t pss_kb = 0; // Proportional Set Size.
uint64_t rss_kb = 0; // Resident Set Size.
uint64_t private_clean_kb = 0;
uint64_t private_dirty_kb = 0;
uint64_t shared_clean_kb = 0;
uint64_t shared_dirty_kb = 0;
uint64_t swapped_kb = 0;
};
explicit ProcessMemoryStats(int pid);
bool ReadLightStats();
bool ReadFullStats();
// Available after ReadLightStats().
uint64_t virt_kb() const { return virt_kb_; }
uint64_t rss_kb() const { return rss_kb_; }
// Available after ReadFullStats().
uint64_t private_clean_kb() const { return private_clean_kb_; }
uint64_t private_dirty_kb() const { return private_dirty_kb_; }
uint64_t shared_clean_kb() const { return shared_clean_kb_; }
uint64_t shared_dirty_kb() const { return shared_dirty_kb_; }
uint64_t swapped_kb() const { return swapped_kb_; }
private:
ProcessMemoryStats(const ProcessMemoryStats&) = delete;
void operator=(const ProcessMemoryStats&) = delete;
const int pid_;
// Light stats.
uint64_t virt_kb_ = 0;
uint64_t rss_kb_ = 0;
// Full stats.
uint64_t pss_kb_ = 0;
uint64_t private_clean_kb_ = 0;
uint64_t private_dirty_kb_ = 0;
uint64_t shared_clean_kb_ = 0;
uint64_t shared_dirty_kb_ = 0;
uint64_t swapped_kb_ = 0;
std::map<uintptr_t, std::unique_ptr<MmapInfo>> mmaps_;
};
#endif // PROCESS_MEMORY_STATS_H_
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