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      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 <memory>
     11 #include <vector>
     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   ProcessMemoryStats() {}
     32 
     33   bool ReadLightStats(int pid);
     34   bool ReadFullStats(int pid);
     35   bool ReadGpuStats(int pid);
     36 
     37   // Available after ReadLightStats().
     38   uint64_t virt_kb() const { return virt_kb_; }
     39   uint64_t rss_kb() const { return rss_kb_; }
     40 
     41   // Available after ReadFullStats().
     42   bool full_stats_available() const { return full_stats_; }
     43   uint64_t pss_kb() const { return pss_kb_; }
     44   uint64_t private_clean_kb() const { return private_clean_kb_; }
     45   uint64_t private_dirty_kb() const { return private_dirty_kb_; }
     46   uint64_t shared_clean_kb() const { return shared_clean_kb_; }
     47   uint64_t shared_dirty_kb() const { return shared_dirty_kb_; }
     48   uint64_t swapped_kb() const { return swapped_kb_; }
     49 
     50   // Available after ReadMemtrackStats().
     51   bool gpu_stats_available() const { return gpu_stats_; }
     52   uint64_t gpu_graphics_kb() const { return gpu_graphics_kb_; }
     53   uint64_t gpu_graphics_pss_kb() const { return gpu_graphics_pss_kb_; }
     54   uint64_t gpu_gl_kb() const { return gpu_gl_kb_; }
     55   uint64_t gpu_gl_pss_kb() const { return gpu_gl_pss_kb_; }
     56   uint64_t gpu_other_kb() const { return gpu_other_kb_; }
     57   uint64_t gpu_other_pss_kb() const { return gpu_other_pss_kb_; }
     58 
     59   size_t mmaps_count() const { return mmaps_.size(); }
     60   const MmapInfo* mmap(size_t index) const { return mmaps_[index].get(); }
     61 
     62  private:
     63   ProcessMemoryStats(const ProcessMemoryStats&) = delete;
     64   void operator=(const ProcessMemoryStats&) = delete;
     65 
     66   // Light stats.
     67   uint64_t virt_kb_ = 0;
     68   uint64_t rss_kb_ = 0;
     69 
     70   // Full stats.
     71   bool full_stats_ = false;
     72   uint64_t pss_kb_ = 0;
     73   uint64_t private_clean_kb_ = 0;
     74   uint64_t private_dirty_kb_ = 0;
     75   uint64_t shared_clean_kb_ = 0;
     76   uint64_t shared_dirty_kb_ = 0;
     77   uint64_t swapped_kb_ = 0;
     78 
     79   // Graphics stats.
     80   bool gpu_stats_ = false;
     81   uint64_t gpu_graphics_kb_ = 0;
     82   uint64_t gpu_graphics_pss_kb_ = 0;
     83   uint64_t gpu_gl_kb_ = 0;
     84   uint64_t gpu_gl_pss_kb_ = 0;
     85   uint64_t gpu_other_kb_ = 0;
     86   uint64_t gpu_other_pss_kb_ = 0;
     87 
     88   std::vector<std::unique_ptr<const MmapInfo>> mmaps_;
     89 };
     90 
     91 #endif  // PROCESS_MEMORY_STATS_H_
     92