DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (1aeaa33a64f9)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// Portions of this file were originally under the following license:
//
// Copyright (C) 2006-2008 Jason Evans <jasone@FreeBSD.org>.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice(s), this list of conditions and the following disclaimer as
//    the first lines of this file unmodified other than the possible
//    addition of one or more copyright notices.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice(s), this list of conditions and the following disclaimer in
//    the documentation and/or other materials provided with the
//    distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef _JEMALLOC_TYPES_H_
#define _JEMALLOC_TYPES_H_

// grab size_t
#ifdef _MSC_VER
#include <crtdefs.h>
#else
#include <stddef.h>
#endif
#include <stdbool.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef MALLOC_USABLE_SIZE_CONST_PTR
#define MALLOC_USABLE_SIZE_CONST_PTR const
#endif

typedef MALLOC_USABLE_SIZE_CONST_PTR void* usable_ptr_t;

typedef size_t arena_id_t;

typedef struct arena_params_s {
  size_t mMaxDirty;

#ifdef __cplusplus
  arena_params_s() : mMaxDirty(0) {}
#endif
} arena_params_t;

// jemalloc_stats() is not a stable interface.  When using jemalloc_stats_t, be
// sure that the compiled results of jemalloc.c are in sync with this header
// file.
typedef struct {
  // Run-time configuration settings.
  bool opt_junk;     // Fill allocated memory with kAllocJunk?
  bool opt_zero;     // Fill allocated memory with 0x0?
  size_t narenas;    // Number of arenas.
  size_t quantum;    // Allocation quantum.
  size_t small_max;  // Max quantum-spaced allocation size.
  size_t large_max;  // Max sub-chunksize allocation size.
  size_t chunksize;  // Size of each virtual memory mapping.
  size_t page_size;  // Size of pages.
  size_t dirty_max;  // Max dirty pages per arena.

  // Current memory usage statistics.
  size_t mapped;       // Bytes mapped (not necessarily committed).
  size_t allocated;    // Bytes allocated (committed, in use by application).
  size_t waste;        // Bytes committed, not in use by the
                       // application, and not intentionally left
                       // unused (i.e., not dirty).
  size_t page_cache;   // Committed, unused pages kept around as a
                       // cache.  (jemalloc calls these "dirty".)
  size_t bookkeeping;  // Committed bytes used internally by the
                       // allocator.
  size_t bin_unused;   // Bytes committed to a bin but currently unused.
} jemalloc_stats_t;

enum PtrInfoTag {
  // The pointer is not currently known to the allocator.
  // 'addr' and 'size' are always 0.
  TagUnknown,

  // The pointer is within a live allocation.
  // 'addr' and 'size' describe the allocation.
  TagLiveSmall,
  TagLiveLarge,
  TagLiveHuge,

  // The pointer is within a small freed allocation.
  // 'addr' and 'size' describe the allocation.
  TagFreedSmall,

  // The pointer is within a freed page. Details about the original
  // allocation, including its size, are not available.
  // 'addr' and 'size' describe the page.
  TagFreedPageDirty,
  TagFreedPageDecommitted,
  TagFreedPageMadvised,
  TagFreedPageZeroed,
};

// The information in jemalloc_ptr_info_t could be represented in a variety of
// ways. The chosen representation has the following properties.
// - The number of fields is minimized.
// - The 'tag' field unambiguously defines the meaning of the subsequent fields.
// Helper functions are used to group together related categories of tags.
typedef struct {
  enum PtrInfoTag tag;
  void* addr;   // meaning depends on tag; see above
  size_t size;  // meaning depends on tag; see above
} jemalloc_ptr_info_t;

static inline bool jemalloc_ptr_is_live(jemalloc_ptr_info_t* info) {
  return info->tag == TagLiveSmall || info->tag == TagLiveLarge ||
         info->tag == TagLiveHuge;
}

static inline bool jemalloc_ptr_is_freed(jemalloc_ptr_info_t* info) {
  return info->tag == TagFreedSmall || info->tag == TagFreedPageDirty ||
         info->tag == TagFreedPageDecommitted ||
         info->tag == TagFreedPageMadvised || info->tag == TagFreedPageZeroed;
}

static inline bool jemalloc_ptr_is_freed_page(jemalloc_ptr_info_t* info) {
  return info->tag == TagFreedPageDirty ||
         info->tag == TagFreedPageDecommitted ||
         info->tag == TagFreedPageMadvised || info->tag == TagFreedPageZeroed;
}

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // _JEMALLOC_TYPES_H_