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annotate third_party/wrk/src/zmalloc.c @ 279:b3b547563ec7

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Add Google connector service and agent wiki Implement the C/Seobeo Google Drive and Gmail connector with encrypted OAuth storage, Zenbu authentication, browser testing, AI tool discovery, chunked HTTP decoding, and Bazel coverage. Consolidate repository guidance into progressive wiki documentation and enforce arena-first allocation for new first-party C code. Co-authored-by: Copilot <[email protected]> Copilot-Session: 84c338fd-0939-4bb3-b7f3-1062eb213e5d
author MrJuneJune <me@mrjunejune.com>
date Mon, 17 Aug 2026 22:22:36 -0700
parents 94705b5986b3
children
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178
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1 /* zmalloc - total amount of allocated memory aware version of malloc()
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2 *
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3 * Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
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4 * All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * * Redistributions of source code must retain the above copyright notice,
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10 * this list of conditions and the following disclaimer.
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11 * * Redistributions in binary form must reproduce the above copyright
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12 * notice, this list of conditions and the following disclaimer in the
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13 * documentation and/or other materials provided with the distribution.
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14 * * Neither the name of Redis nor the names of its contributors may be used
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15 * to endorse or promote products derived from this software without
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16 * specific prior written permission.
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17 *
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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28 * POSSIBILITY OF SUCH DAMAGE.
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29 */
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30
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31 #include <stdio.h>
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32 #include <stdlib.h>
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33
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34 /* This function provide us access to the original libc free(). This is useful
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35 * for instance to free results obtained by backtrace_symbols(). We need
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36 * to define this function before including zmalloc.h that may shadow the
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37 * free implementation if we use jemalloc or another non standard allocator. */
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38 void zlibc_free(void *ptr) {
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39 free(ptr);
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40 }
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41
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42 #include <string.h>
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43 #include <pthread.h>
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44 #include "config.h"
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45 #include "zmalloc.h"
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46 #include "atomicvar.h"
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47
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48 #ifdef HAVE_MALLOC_SIZE
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49 #define PREFIX_SIZE (0)
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50 #else
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51 #if defined(__sun) || defined(__sparc) || defined(__sparc__)
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52 #define PREFIX_SIZE (sizeof(long long))
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53 #else
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54 #define PREFIX_SIZE (sizeof(size_t))
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55 #endif
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56 #endif
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57
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58 /* Explicitly override malloc/free etc when using tcmalloc. */
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59 #if defined(USE_TCMALLOC)
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60 #define malloc(size) tc_malloc(size)
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61 #define calloc(count,size) tc_calloc(count,size)
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62 #define realloc(ptr,size) tc_realloc(ptr,size)
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63 #define free(ptr) tc_free(ptr)
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64 #elif defined(USE_JEMALLOC)
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65 #define malloc(size) je_malloc(size)
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66 #define calloc(count,size) je_calloc(count,size)
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67 #define realloc(ptr,size) je_realloc(ptr,size)
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68 #define free(ptr) je_free(ptr)
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69 #define mallocx(size,flags) je_mallocx(size,flags)
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70 #define dallocx(ptr,flags) je_dallocx(ptr,flags)
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71 #endif
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72
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73 #define update_zmalloc_stat_alloc(__n) do { \
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74 size_t _n = (__n); \
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75 if (_n&(sizeof(long)-1)) _n += sizeof(long)-(_n&(sizeof(long)-1)); \
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76 atomicIncr(used_memory,__n); \
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77 } while(0)
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78
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79 #define update_zmalloc_stat_free(__n) do { \
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80 size_t _n = (__n); \
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81 if (_n&(sizeof(long)-1)) _n += sizeof(long)-(_n&(sizeof(long)-1)); \
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82 atomicDecr(used_memory,__n); \
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83 } while(0)
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84
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85 static size_t used_memory = 0;
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86 pthread_mutex_t used_memory_mutex = PTHREAD_MUTEX_INITIALIZER;
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87
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88 static void zmalloc_default_oom(size_t size) {
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89 fprintf(stderr, "zmalloc: Out of memory trying to allocate %zu bytes\n",
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90 size);
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91 fflush(stderr);
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92 abort();
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93 }
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94
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95 static void (*zmalloc_oom_handler)(size_t) = zmalloc_default_oom;
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96
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97 void *zmalloc(size_t size) {
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98 void *ptr = malloc(size+PREFIX_SIZE);
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99
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100 if (!ptr) zmalloc_oom_handler(size);
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101 #ifdef HAVE_MALLOC_SIZE
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102 update_zmalloc_stat_alloc(zmalloc_size(ptr));
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103 return ptr;
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104 #else
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105 *((size_t*)ptr) = size;
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106 update_zmalloc_stat_alloc(size+PREFIX_SIZE);
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107 return (char*)ptr+PREFIX_SIZE;
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108 #endif
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109 }
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110
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111 /* Allocation and free functions that bypass the thread cache
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112 * and go straight to the allocator arena bins.
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113 * Currently implemented only for jemalloc. Used for online defragmentation. */
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114 #ifdef HAVE_DEFRAG
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115 void *zmalloc_no_tcache(size_t size) {
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116 void *ptr = mallocx(size+PREFIX_SIZE, MALLOCX_TCACHE_NONE);
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117 if (!ptr) zmalloc_oom_handler(size);
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118 update_zmalloc_stat_alloc(zmalloc_size(ptr));
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119 return ptr;
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120 }
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121
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122 void zfree_no_tcache(void *ptr) {
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123 if (ptr == NULL) return;
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124 update_zmalloc_stat_free(zmalloc_size(ptr));
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125 dallocx(ptr, MALLOCX_TCACHE_NONE);
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126 }
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127 #endif
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128
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diff changeset
129 void *zcalloc(size_t size) {
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130 void *ptr = calloc(1, size+PREFIX_SIZE);
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131
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132 if (!ptr) zmalloc_oom_handler(size);
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133 #ifdef HAVE_MALLOC_SIZE
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134 update_zmalloc_stat_alloc(zmalloc_size(ptr));
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135 return ptr;
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diff changeset
136 #else
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137 *((size_t*)ptr) = size;
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138 update_zmalloc_stat_alloc(size+PREFIX_SIZE);
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139 return (char*)ptr+PREFIX_SIZE;
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140 #endif
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141 }
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142
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143 void *zrealloc(void *ptr, size_t size) {
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144 #ifndef HAVE_MALLOC_SIZE
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145 void *realptr;
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146 #endif
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147 size_t oldsize;
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148 void *newptr;
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149
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150 if (ptr == NULL) return zmalloc(size);
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151 #ifdef HAVE_MALLOC_SIZE
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152 oldsize = zmalloc_size(ptr);
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153 newptr = realloc(ptr,size);
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154 if (!newptr) zmalloc_oom_handler(size);
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155
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156 update_zmalloc_stat_free(oldsize);
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157 update_zmalloc_stat_alloc(zmalloc_size(newptr));
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158 return newptr;
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159 #else
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160 realptr = (char*)ptr-PREFIX_SIZE;
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161 oldsize = *((size_t*)realptr);
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162 newptr = realloc(realptr,size+PREFIX_SIZE);
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163 if (!newptr) zmalloc_oom_handler(size);
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164
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165 *((size_t*)newptr) = size;
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166 update_zmalloc_stat_free(oldsize);
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167 update_zmalloc_stat_alloc(size);
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168 return (char*)newptr+PREFIX_SIZE;
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169 #endif
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170 }
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171
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172 /* Provide zmalloc_size() for systems where this function is not provided by
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173 * malloc itself, given that in that case we store a header with this
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174 * information as the first bytes of every allocation. */
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175 #ifndef HAVE_MALLOC_SIZE
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176 size_t zmalloc_size(void *ptr) {
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177 void *realptr = (char*)ptr-PREFIX_SIZE;
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178 size_t size = *((size_t*)realptr);
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179 /* Assume at least that all the allocations are padded at sizeof(long) by
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180 * the underlying allocator. */
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diff changeset
181 if (size&(sizeof(long)-1)) size += sizeof(long)-(size&(sizeof(long)-1));
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182 return size+PREFIX_SIZE;
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183 }
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184 #endif
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185
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186 void zfree(void *ptr) {
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187 #ifndef HAVE_MALLOC_SIZE
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188 void *realptr;
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189 size_t oldsize;
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190 #endif
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191
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192 if (ptr == NULL) return;
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193 #ifdef HAVE_MALLOC_SIZE
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194 update_zmalloc_stat_free(zmalloc_size(ptr));
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195 free(ptr);
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196 #else
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197 realptr = (char*)ptr-PREFIX_SIZE;
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198 oldsize = *((size_t*)realptr);
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199 update_zmalloc_stat_free(oldsize+PREFIX_SIZE);
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200 free(realptr);
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diff changeset
201 #endif
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202 }
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diff changeset
203
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diff changeset
204 char *zstrdup(const char *s) {
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diff changeset
205 size_t l = strlen(s)+1;
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diff changeset
206 char *p = zmalloc(l);
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diff changeset
207
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diff changeset
208 memcpy(p,s,l);
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diff changeset
209 return p;
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diff changeset
210 }
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parents:
diff changeset
211
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parents:
diff changeset
212 size_t zmalloc_used_memory(void) {
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parents:
diff changeset
213 size_t um;
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parents:
diff changeset
214 atomicGet(used_memory,um);
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parents:
diff changeset
215 return um;
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parents:
diff changeset
216 }
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diff changeset
217
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diff changeset
218 void zmalloc_set_oom_handler(void (*oom_handler)(size_t)) {
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diff changeset
219 zmalloc_oom_handler = oom_handler;
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220 }
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221
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diff changeset
222 /* Get the RSS information in an OS-specific way.
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223 *
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224 * WARNING: the function zmalloc_get_rss() is not designed to be fast
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225 * and may not be called in the busy loops where Redis tries to release
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226 * memory expiring or swapping out objects.
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227 *
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228 * For this kind of "fast RSS reporting" usages use instead the
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229 * function RedisEstimateRSS() that is a much faster (and less precise)
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diff changeset
230 * version of the function. */
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diff changeset
231
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diff changeset
232 #if defined(HAVE_PROC_STAT)
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233 #include <unistd.h>
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234 #include <sys/types.h>
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235 #include <sys/stat.h>
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diff changeset
236 #include <fcntl.h>
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diff changeset
237
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diff changeset
238 size_t zmalloc_get_rss(void) {
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diff changeset
239 int page = sysconf(_SC_PAGESIZE);
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diff changeset
240 size_t rss;
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parents:
diff changeset
241 char buf[4096];
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
242 char filename[256];
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
243 int fd, count;
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parents:
diff changeset
244 char *p, *x;
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diff changeset
245
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diff changeset
246 snprintf(filename,256,"/proc/%d/stat",getpid());
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parents:
diff changeset
247 if ((fd = open(filename,O_RDONLY)) == -1) return 0;
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parents:
diff changeset
248 if (read(fd,buf,4096) <= 0) {
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diff changeset
249 close(fd);
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diff changeset
250 return 0;
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parents:
diff changeset
251 }
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parents:
diff changeset
252 close(fd);
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diff changeset
253
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diff changeset
254 p = buf;
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parents:
diff changeset
255 count = 23; /* RSS is the 24th field in /proc/<pid>/stat */
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parents:
diff changeset
256 while(p && count--) {
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diff changeset
257 p = strchr(p,' ');
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parents:
diff changeset
258 if (p) p++;
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parents:
diff changeset
259 }
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parents:
diff changeset
260 if (!p) return 0;
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261 x = strchr(p,' ');
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262 if (!x) return 0;
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MrJuneJune <me@mrjunejune.com>
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diff changeset
263 *x = '\0';
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diff changeset
264
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265 rss = strtoll(p,NULL,10);
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266 rss *= page;
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MrJuneJune <me@mrjunejune.com>
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267 return rss;
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268 }
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269 #elif defined(HAVE_TASKINFO)
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270 #include <unistd.h>
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271 #include <stdio.h>
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272 #include <stdlib.h>
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273 #include <sys/types.h>
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274 #include <sys/sysctl.h>
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275 #include <mach/task.h>
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276 #include <mach/mach_init.h>
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277
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278 size_t zmalloc_get_rss(void) {
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279 task_t task = MACH_PORT_NULL;
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280 struct task_basic_info t_info;
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diff changeset
281 mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
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282
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283 if (task_for_pid(current_task(), getpid(), &task) != KERN_SUCCESS)
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284 return 0;
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285 task_info(task, TASK_BASIC_INFO, (task_info_t)&t_info, &t_info_count);
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286
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287 return t_info.resident_size;
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288 }
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289 #else
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290 size_t zmalloc_get_rss(void) {
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291 /* If we can't get the RSS in an OS-specific way for this system just
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292 * return the memory usage we estimated in zmalloc()..
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293 *
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294 * Fragmentation will appear to be always 1 (no fragmentation)
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295 * of course... */
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296 return zmalloc_used_memory();
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297 }
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298 #endif
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299
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300 /* Fragmentation = RSS / allocated-bytes */
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diff changeset
301 float zmalloc_get_fragmentation_ratio(size_t rss) {
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302 return (float)rss/zmalloc_used_memory();
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303 }
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diff changeset
304
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MrJuneJune <me@mrjunejune.com>
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diff changeset
305 /* Get the sum of the specified field (converted form kb to bytes) in
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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306 * /proc/self/smaps. The field must be specified with trailing ":" as it
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diff changeset
307 * apperas in the smaps output.
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MrJuneJune <me@mrjunejune.com>
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diff changeset
308 *
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309 * If a pid is specified, the information is extracted for such a pid,
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310 * otherwise if pid is -1 the information is reported is about the
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311 * current process.
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MrJuneJune <me@mrjunejune.com>
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312 *
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
313 * Example: zmalloc_get_smap_bytes_by_field("Rss:",-1);
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diff changeset
314 */
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MrJuneJune <me@mrjunejune.com>
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315 #if defined(HAVE_PROC_SMAPS)
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diff changeset
316 size_t zmalloc_get_smap_bytes_by_field(char *field, long pid) {
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317 char line[1024];
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diff changeset
318 size_t bytes = 0;
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319 int flen = strlen(field);
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320 FILE *fp;
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diff changeset
321
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322 if (pid == -1) {
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diff changeset
323 fp = fopen("/proc/self/smaps","r");
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diff changeset
324 } else {
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diff changeset
325 char filename[128];
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diff changeset
326 snprintf(filename,sizeof(filename),"/proc/%ld/smaps",pid);
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327 fp = fopen(filename,"r");
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diff changeset
328 }
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diff changeset
329
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MrJuneJune <me@mrjunejune.com>
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diff changeset
330 if (!fp) return 0;
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diff changeset
331 while(fgets(line,sizeof(line),fp) != NULL) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
332 if (strncmp(line,field,flen) == 0) {
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parents:
diff changeset
333 char *p = strchr(line,'k');
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
334 if (p) {
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
335 *p = '\0';
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parents:
diff changeset
336 bytes += strtol(line+flen,NULL,10) * 1024;
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parents:
diff changeset
337 }
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
338 }
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
339 }
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
340 fclose(fp);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
341 return bytes;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
342 }
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
343 #else
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parents:
diff changeset
344 size_t zmalloc_get_smap_bytes_by_field(char *field, long pid) {
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parents:
diff changeset
345 ((void) field);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
346 ((void) pid);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
347 return 0;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
348 }
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parents:
diff changeset
349 #endif
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parents:
diff changeset
350
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parents:
diff changeset
351 size_t zmalloc_get_private_dirty(long pid) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
352 return zmalloc_get_smap_bytes_by_field("Private_Dirty:",pid);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
353 }
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parents:
diff changeset
354
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parents:
diff changeset
355 /* Returns the size of physical memory (RAM) in bytes.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
356 * It looks ugly, but this is the cleanest way to achive cross platform results.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
357 * Cleaned up from:
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MrJuneJune <me@mrjunejune.com>
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diff changeset
358 *
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
359 * http://nadeausoftware.com/articles/2012/09/c_c_tip_how_get_physical_memory_size_system
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
360 *
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
361 * Note that this function:
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
362 * 1) Was released under the following CC attribution license:
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
363 * http://creativecommons.org/licenses/by/3.0/deed.en_US.
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
364 * 2) Was originally implemented by David Robert Nadeau.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
365 * 3) Was modified for Redis by Matt Stancliff.
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parents:
diff changeset
366 * 4) This note exists in order to comply with the original license.
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parents:
diff changeset
367 */
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
368 size_t zmalloc_get_memory_size(void) {
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parents:
diff changeset
369 #if defined(__unix__) || defined(__unix) || defined(unix) || \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
370 (defined(__APPLE__) && defined(__MACH__))
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parents:
diff changeset
371 #if defined(CTL_HW) && (defined(HW_MEMSIZE) || defined(HW_PHYSMEM64))
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
372 int mib[2];
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
373 mib[0] = CTL_HW;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
374 #if defined(HW_MEMSIZE)
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parents:
diff changeset
375 mib[1] = HW_MEMSIZE; /* OSX. --------------------- */
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
376 #elif defined(HW_PHYSMEM64)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
377 mib[1] = HW_PHYSMEM64; /* NetBSD, OpenBSD. --------- */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
378 #endif
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
379 int64_t size = 0; /* 64-bit */
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parents:
diff changeset
380 size_t len = sizeof(size);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
381 if (sysctl( mib, 2, &size, &len, NULL, 0) == 0)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
382 return (size_t)size;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
383 return 0L; /* Failed? */
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
384
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
385 #elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
386 /* FreeBSD, Linux, OpenBSD, and Solaris. -------------------- */
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parents:
diff changeset
387 return (size_t)sysconf(_SC_PHYS_PAGES) * (size_t)sysconf(_SC_PAGESIZE);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
388
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
389 #elif defined(CTL_HW) && (defined(HW_PHYSMEM) || defined(HW_REALMEM))
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
390 /* DragonFly BSD, FreeBSD, NetBSD, OpenBSD, and OSX. -------- */
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391 int mib[2];
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392 mib[0] = CTL_HW;
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393 #if defined(HW_REALMEM)
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394 mib[1] = HW_REALMEM; /* FreeBSD. ----------------- */
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395 #elif defined(HW_PYSMEM)
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396 mib[1] = HW_PHYSMEM; /* Others. ------------------ */
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397 #endif
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398 unsigned int size = 0; /* 32-bit */
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399 size_t len = sizeof(size);
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400 if (sysctl(mib, 2, &size, &len, NULL, 0) == 0)
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401 return (size_t)size;
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402 return 0L; /* Failed? */
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403 #else
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404 return 0L; /* Unknown method to get the data. */
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405 #endif
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406 #else
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407 return 0L; /* Unknown OS. */
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408 #endif
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409 }
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410
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411