compiler-rt/lib/memprof/memprof_stats.h

   1 //===-- memprof_stats.h ----------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is a part of MemProfiler, a memory profiler.
  10 //
  11 // MemProf-private header for statistics.
  12 //===----------------------------------------------------------------------===//
  13 #ifndef MEMPROF_STATS_H
  14 #define MEMPROF_STATS_H
  15
  16 #include "memprof_allocator.h"
  17 #include "memprof_internal.h"
  18
  19 namespace __memprof {
  20
  21 // MemprofStats struct is NOT thread-safe.
  22 // Each MemprofThread has its own MemprofStats, which are sometimes flushed
  23 // to the accumulated MemprofStats.
  24 struct MemprofStats {
  25   // MemprofStats must be a struct consisting of uptr fields only.
  26   // When merging two MemprofStats structs, we treat them as arrays of uptr.
  27   uptr mallocs;
  28   uptr malloced;
  29   uptr malloced_overhead;
  30   uptr frees;
  31   uptr freed;
  32   uptr real_frees;
  33   uptr really_freed;
  34   uptr reallocs;
  35   uptr realloced;
  36   uptr mmaps;
  37   uptr mmaped;
  38   uptr munmaps;
  39   uptr munmaped;
  40   uptr malloc_large;
  41   uptr malloced_by_size[kNumberOfSizeClasses];
  42
  43   // Ctor for global MemprofStats (accumulated stats for dead threads).
  44   explicit MemprofStats(LinkerInitialized) {}
  45   // Creates empty stats.
  46   MemprofStats();
  47
  48   void Print(); // Prints formatted stats to stderr.
  49   void Clear();
  50   void MergeFrom(const MemprofStats *stats);
  51 };
  52
  53 // Returns stats for GetCurrentThread(), or stats for fake "unknown thread"
  54 // if GetCurrentThread() returns 0.
  55 MemprofStats &GetCurrentThreadStats();
  56 // Flushes a given stats into accumulated stats of dead threads.
  57 void FlushToDeadThreadStats(MemprofStats *stats);
  58
  59 } // namespace __memprof
  60
  61 #endif // MEMPROF_STATS_H