1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef PROCESS_MEMORY_STATS_H_ 6 #define PROCESS_MEMORY_STATS_H_ 7 8 #include <stdint.h> 9 10 #include <map> 11 #include <memory> 12 13 // Reads process memory stats from /proc/pid/{statm,smaps}. 14 class ProcessMemoryStats { 15 public: 16 struct MmapInfo { 17 char mapped_file[128] = {}; 18 char prot_flags[5] = {}; 19 uint64_t start_addr = 0; 20 uint64_t end_addr = 0; 21 uint64_t virt_kb = 0; 22 uint64_t pss_kb = 0; // Proportional Set Size. 23 uint64_t rss_kb = 0; // Resident Set Size. 24 uint64_t private_clean_kb = 0; 25 uint64_t private_dirty_kb = 0; 26 uint64_t shared_clean_kb = 0; 27 uint64_t shared_dirty_kb = 0; 28 uint64_t swapped_kb = 0; 29 }; 30 31 explicit ProcessMemoryStats(int pid); 32 33 bool ReadLightStats(); 34 bool ReadFullStats(); 35 36 // Available after ReadLightStats(). virt_kb()37 uint64_t virt_kb() const { return virt_kb_; } rss_kb()38 uint64_t rss_kb() const { return rss_kb_; } 39 40 // Available after ReadFullStats(). private_clean_kb()41 uint64_t private_clean_kb() const { return private_clean_kb_; } private_dirty_kb()42 uint64_t private_dirty_kb() const { return private_dirty_kb_; } shared_clean_kb()43 uint64_t shared_clean_kb() const { return shared_clean_kb_; } shared_dirty_kb()44 uint64_t shared_dirty_kb() const { return shared_dirty_kb_; } swapped_kb()45 uint64_t swapped_kb() const { return swapped_kb_; } 46 47 private: 48 ProcessMemoryStats(const ProcessMemoryStats&) = delete; 49 void operator=(const ProcessMemoryStats&) = delete; 50 51 const int pid_; 52 53 // Light stats. 54 uint64_t virt_kb_ = 0; 55 uint64_t rss_kb_ = 0; 56 57 // Full stats. 58 uint64_t pss_kb_ = 0; 59 uint64_t private_clean_kb_ = 0; 60 uint64_t private_dirty_kb_ = 0; 61 uint64_t shared_clean_kb_ = 0; 62 uint64_t shared_dirty_kb_ = 0; 63 uint64_t swapped_kb_ = 0; 64 65 std::map<uintptr_t, std::unique_ptr<MmapInfo>> mmaps_; 66 }; 67 68 #endif // PROCESS_MEMORY_STATS_H_ 69