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111
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1 /* A memory statistics tracking infrastructure.
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2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
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3 Contributed by Martin Liska <mliska@suse.cz>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #ifndef GCC_MEM_STATS_H
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22 #define GCC_MEM_STATS_H
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23
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24 /* Forward declaration. */
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25 template<typename Key, typename Value,
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26 typename Traits = simple_hashmap_traits<default_hash_traits<Key>,
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27 Value> >
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28 class hash_map;
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29
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30 #define LOCATION_LINE_EXTRA_SPACE 30
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31 #define LOCATION_LINE_WIDTH 48
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32
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33 /* Memory allocation location. */
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34 struct mem_location
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35 {
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36 /* Default constructor. */
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37 inline
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38 mem_location () {}
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39
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40 /* Constructor. */
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41 inline
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42 mem_location (mem_alloc_origin origin, bool ggc,
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43 const char *filename = NULL, int line = 0,
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44 const char *function = NULL):
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45 m_filename (filename), m_function (function), m_line (line), m_origin
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46 (origin), m_ggc (ggc) {}
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47
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48 /* Copy constructor. */
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49 inline
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50 mem_location (mem_location &other): m_filename (other.m_filename),
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51 m_function (other.m_function), m_line (other.m_line),
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52 m_origin (other.m_origin), m_ggc (other.m_ggc) {}
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53
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54 /* Compute hash value based on file name, function name and line in
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55 source code. As there is just a single pointer registered for every
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56 constant that points to e.g. the same file name, we can use hash
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57 of the pointer. */
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58 hashval_t
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59 hash ()
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60 {
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61 inchash::hash hash;
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62
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63 hash.add_ptr (m_filename);
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64 hash.add_ptr (m_function);
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65 hash.add_int (m_line);
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66
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67 return hash.end ();
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68 }
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69
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70 /* Return true if the memory location is equal to OTHER. */
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71 int
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72 equal (mem_location &other)
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73 {
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74 return m_filename == other.m_filename && m_function == other.m_function
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75 && m_line == other.m_line;
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76 }
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77
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78 /* Return trimmed filename for the location. */
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79 inline const char *
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80 get_trimmed_filename ()
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81 {
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82 const char *s1 = m_filename;
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83 const char *s2;
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84
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85 while ((s2 = strstr (s1, "gcc/")))
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86 s1 = s2 + 4;
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87
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88 return s1;
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89 }
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90
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91 inline char *
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92 to_string ()
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93 {
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94 unsigned l = strlen (get_trimmed_filename ()) + strlen (m_function)
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95 + LOCATION_LINE_EXTRA_SPACE;
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96
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97 char *s = XNEWVEC (char, l);
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98 sprintf (s, "%s:%i (%s)", get_trimmed_filename (),
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99 m_line, m_function);
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100
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101 s[MIN (LOCATION_LINE_WIDTH, l - 1)] = '\0';
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102
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103 return s;
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104 }
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105
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106 /* Return display name associated to ORIGIN type. */
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107 static const char *
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108 get_origin_name (mem_alloc_origin origin)
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109 {
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110 return mem_alloc_origin_names[(unsigned) origin];
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111 }
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112
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113 /* File name of source code. */
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114 const char *m_filename;
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115 /* Funcation name. */
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116 const char *m_function;
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117 /* Line number in source code. */
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118 int m_line;
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119 /* Origin type. */
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120 mem_alloc_origin m_origin;
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121 /* Flag if used by GGC allocation. */
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122 bool m_ggc;
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123 };
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124
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125 /* Memory usage register to a memory location. */
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126 struct mem_usage
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127 {
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128 /* Default constructor. */
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129 mem_usage (): m_allocated (0), m_times (0), m_peak (0), m_instances (1) {}
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130
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131 /* Constructor. */
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132 mem_usage (size_t allocated, size_t times, size_t peak, size_t instances = 0):
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133 m_allocated (allocated), m_times (times), m_peak (peak),
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134 m_instances (instances) {}
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135
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136 /* Register overhead of SIZE bytes. */
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137 inline void
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138 register_overhead (size_t size)
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139 {
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140 m_allocated += size;
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141 m_times++;
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142
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143 if (m_peak < m_allocated)
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144 m_peak = m_allocated;
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145 }
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146
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147 /* Release overhead of SIZE bytes. */
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148 inline void
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149 release_overhead (size_t size)
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150 {
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151 gcc_assert (size <= m_allocated);
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152
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153 m_allocated -= size;
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154 }
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155
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156 /* Sum the usage with SECOND usage. */
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157 mem_usage
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158 operator+ (const mem_usage &second)
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159 {
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160 return mem_usage (m_allocated + second.m_allocated,
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161 m_times + second.m_times,
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162 m_peak + second.m_peak,
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163 m_instances + second.m_instances);
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164 }
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165
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166 /* Comparison operator. */
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167 inline bool
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168 operator< (const mem_usage &second) const
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169 {
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170 return (m_allocated == second.m_allocated ?
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171 (m_peak == second.m_peak ? m_times < second.m_times
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172 : m_peak < second.m_peak) : m_allocated < second.m_allocated);
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173 }
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174
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175 /* Compare wrapper used by qsort method. */
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176 static int
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177 compare (const void *first, const void *second)
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178 {
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179 typedef std::pair<mem_location *, mem_usage *> mem_pair_t;
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180
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181 const mem_pair_t f = *(const mem_pair_t *)first;
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182 const mem_pair_t s = *(const mem_pair_t *)second;
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183
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184 return (*f.second) < (*s.second);
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185 }
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186
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187 /* Dump usage coupled to LOC location, where TOTAL is sum of all rows. */
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188 inline void
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189 dump (mem_location *loc, mem_usage &total) const
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190 {
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191 char *location_string = loc->to_string ();
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192
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193 fprintf (stderr, "%-48s %10" PRIu64 ":%5.1f%%"
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194 "%10" PRIu64 "%10" PRIu64 ":%5.1f%%%10s\n",
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195 location_string, (uint64_t)m_allocated,
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196 get_percent (m_allocated, total.m_allocated),
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197 (uint64_t)m_peak, (uint64_t)m_times,
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198 get_percent (m_times, total.m_times), loc->m_ggc ? "ggc" : "heap");
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199
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200 free (location_string);
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201 }
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202
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203 /* Dump footer. */
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204 inline void
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205 dump_footer () const
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206 {
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207 print_dash_line ();
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208 fprintf (stderr, "%s%54" PRIu64 "%27" PRIu64 "\n", "Total",
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209 (uint64_t)m_allocated, (uint64_t)m_times);
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210 print_dash_line ();
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211 }
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212
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213 /* Return fraction of NOMINATOR and DENOMINATOR in percent. */
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214 static inline float
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215 get_percent (size_t nominator, size_t denominator)
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216 {
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217 return denominator == 0 ? 0.0f : nominator * 100.0 / denominator;
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218 }
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219
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220 /* Print line made of dashes. */
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221 static inline void
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222 print_dash_line (size_t count = 140)
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223 {
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224 while (count--)
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225 fputc ('-', stderr);
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226 fputc ('\n', stderr);
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227 }
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228
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229 /* Dump header with NAME. */
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230 static inline void
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231 dump_header (const char *name)
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232 {
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233 fprintf (stderr, "%-48s %11s%16s%10s%17s\n", name, "Leak", "Peak",
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234 "Times", "Type");
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235 print_dash_line ();
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236 }
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237
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238 /* Current number of allocated bytes. */
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239 size_t m_allocated;
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240 /* Number of allocations. */
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241 size_t m_times;
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242 /* Peak allocation in bytes. */
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243 size_t m_peak;
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244 /* Number of container instances. */
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245 size_t m_instances;
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246 };
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247
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248 /* Memory usage pair that connectes memory usage and number
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249 of allocated bytes. */
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250 template <class T>
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251 struct mem_usage_pair
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252 {
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253 mem_usage_pair (T *usage_, size_t allocated_): usage (usage_),
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254 allocated (allocated_) {}
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255
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256 T *usage;
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257 size_t allocated;
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258 };
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259
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260 /* Memory allocation description. */
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261 template <class T>
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262 class mem_alloc_description
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263 {
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264 public:
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265 struct mem_location_hash : nofree_ptr_hash <mem_location>
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266 {
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267 static hashval_t
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268 hash (value_type l)
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269 {
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270 inchash::hash hstate;
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271
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272 hstate.add_ptr ((const void *)l->m_filename);
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273 hstate.add_ptr (l->m_function);
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274 hstate.add_int (l->m_line);
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275
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276 return hstate.end ();
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277 }
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278
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279 static bool
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280 equal (value_type l1, value_type l2)
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281 {
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282 return l1->m_filename == l2->m_filename
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283 && l1->m_function == l2->m_function
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284 && l1->m_line == l2->m_line;
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285 }
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286 };
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287
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288 /* Internal class type definitions. */
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289 typedef hash_map <mem_location_hash, T *> mem_map_t;
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290 typedef hash_map <const void *, mem_usage_pair<T> > reverse_mem_map_t;
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291 typedef hash_map <const void *, std::pair<T *, size_t> > reverse_object_map_t;
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292 typedef std::pair <mem_location *, T *> mem_list_t;
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293
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294 /* Default contructor. */
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295 mem_alloc_description ();
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296
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297 /* Default destructor. */
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298 ~mem_alloc_description ();
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299
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300 /* Returns true if instance PTR is registered by the memory description. */
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301 bool
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302 contains_descriptor_for_instance (const void *ptr);
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303
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304 /* Return descriptor for instance PTR. */
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305 T *
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306 get_descriptor_for_instance (const void *ptr);
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307
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308 /* Register memory allocation descriptor for container PTR which is
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309 described by a memory LOCATION. */
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310 T *
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311 register_descriptor (const void *ptr, mem_location *location);
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312
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313 /* Register memory allocation descriptor for container PTR. ORIGIN identifies
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314 type of container and GGC identifes if the allocation is handled in GGC
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315 memory. Each location is identified by file NAME, LINE in source code and
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316 FUNCTION name. */
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317 T *
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318 register_descriptor (const void *ptr, mem_alloc_origin origin,
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319 bool ggc, const char *name, int line,
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320 const char *function);
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321
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322 /* Register instance overhead identified by PTR pointer. Allocation takes
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323 SIZE bytes. */
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324 T *
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325 register_instance_overhead (size_t size, const void *ptr);
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326
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327 /* For containers (and GGC) where we want to track every instance object,
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328 we register allocation of SIZE bytes, identified by PTR pointer, belonging
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329 to USAGE descriptor. */
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330 void
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331 register_object_overhead (T *usage, size_t size, const void *ptr);
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332
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333 /* Release PTR pointer of SIZE bytes. If REMOVE_FROM_MAP is set to true,
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334 remove the instance from reverse map. */
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335 void
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336 release_instance_overhead (void *ptr, size_t size,
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337 bool remove_from_map = false);
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338
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339 /* Release intance object identified by PTR pointer. */
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340 void
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341 release_object_overhead (void *ptr);
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342
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343 /* Get sum value for ORIGIN type of allocation for the descriptor. */
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344 T
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345 get_sum (mem_alloc_origin origin);
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346
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347 /* Get all tracked instances registered by the description. Items
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348 are filtered by ORIGIN type, LENGTH is return value where we register
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349 the number of elements in the list. If we want to process custom order,
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350 CMP comparator can be provided. */
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351 mem_list_t *
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352 get_list (mem_alloc_origin origin, unsigned *length,
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353 int (*cmp) (const void *first, const void *second) = NULL);
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354
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355 /* Dump all tracked instances of type ORIGIN. If we want to process custom
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356 order, CMP comparator can be provided. */
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357 void dump (mem_alloc_origin origin,
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358 int (*cmp) (const void *first, const void *second) = NULL);
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359
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360 /* Reverse object map used for every object allocation mapping. */
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361 reverse_object_map_t *m_reverse_object_map;
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362
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363 private:
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364 /* Register overhead of SIZE bytes of ORIGIN type. PTR pointer is allocated
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365 in NAME source file, at LINE in source code, in FUNCTION. */
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366 T *register_overhead (size_t size, mem_alloc_origin origin, const char *name,
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367 int line, const char *function, const void *ptr);
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368
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369 /* Allocation location coupled to the description. */
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370 mem_location m_location;
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371
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372 /* Location to usage mapping. */
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373 mem_map_t *m_map;
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374
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375 /* Reverse pointer to usage mapping. */
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376 reverse_mem_map_t *m_reverse_map;
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377 };
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378
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379
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380 /* Returns true if instance PTR is registered by the memory description. */
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381
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382 template <class T>
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383 inline bool
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384 mem_alloc_description<T>::contains_descriptor_for_instance (const void *ptr)
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385 {
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386 return m_reverse_map->get (ptr);
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387 }
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388
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389 /* Return descriptor for instance PTR. */
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390
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391 template <class T>
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392 inline T*
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393 mem_alloc_description<T>::get_descriptor_for_instance (const void *ptr)
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394 {
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395 return m_reverse_map->get (ptr) ? (*m_reverse_map->get (ptr)).usage : NULL;
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396 }
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397
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398
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399 /* Register memory allocation descriptor for container PTR which is
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400 described by a memory LOCATION. */
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401 template <class T>
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402 inline T*
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403 mem_alloc_description<T>::register_descriptor (const void *ptr,
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404 mem_location *location)
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405 {
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406 T *usage = NULL;
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407
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408 T **slot = m_map->get (location);
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409 if (slot)
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410 {
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411 delete location;
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412 usage = *slot;
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413 usage->m_instances++;
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414 }
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415 else
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416 {
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417 usage = new T ();
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418 m_map->put (location, usage);
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419 }
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420
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421 if (!m_reverse_map->get (ptr))
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422 m_reverse_map->put (ptr, mem_usage_pair<T> (usage, 0));
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423
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424 return usage;
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425 }
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426
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427 /* Register memory allocation descriptor for container PTR. ORIGIN identifies
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428 type of container and GGC identifes if the allocation is handled in GGC
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429 memory. Each location is identified by file NAME, LINE in source code and
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430 FUNCTION name. */
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431
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432 template <class T>
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433 inline T*
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434 mem_alloc_description<T>::register_descriptor (const void *ptr,
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435 mem_alloc_origin origin,
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436 bool ggc,
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437 const char *filename,
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438 int line,
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439 const char *function)
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440 {
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441 mem_location *l = new mem_location (origin, ggc, filename, line, function);
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442 return register_descriptor (ptr, l);
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443 }
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444
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445 /* Register instance overhead identified by PTR pointer. Allocation takes
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446 SIZE bytes. */
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447
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448 template <class T>
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449 inline T*
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450 mem_alloc_description<T>::register_instance_overhead (size_t size,
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451 const void *ptr)
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452 {
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453 mem_usage_pair <T> *slot = m_reverse_map->get (ptr);
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454 if (!slot)
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455 {
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456 /* Due to PCH, it can really happen. */
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457 return NULL;
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458 }
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459
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460 T *usage = (*slot).usage;
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461 usage->register_overhead (size);
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462
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463 return usage;
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464 }
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465
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466 /* For containers (and GGC) where we want to track every instance object,
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467 we register allocation of SIZE bytes, identified by PTR pointer, belonging
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468 to USAGE descriptor. */
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469
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470 template <class T>
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471 void
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472 mem_alloc_description<T>::register_object_overhead (T *usage, size_t size,
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473 const void *ptr)
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474 {
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475 /* In case of GGC, it is possible to have already occupied the memory
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476 location. */
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477 m_reverse_object_map->put (ptr, std::pair<T *, size_t> (usage, size));
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478 }
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479
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480 /* Register overhead of SIZE bytes of ORIGIN type. PTR pointer is allocated
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481 in NAME source file, at LINE in source code, in FUNCTION. */
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482
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483 template <class T>
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484 inline T*
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485 mem_alloc_description<T>::register_overhead (size_t size,
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486 mem_alloc_origin origin,
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487 const char *filename,
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488 int line,
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489 const char *function,
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490 const void *ptr)
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491 {
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492 T *usage = register_descriptor (ptr, origin, filename, line, function);
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493 usage->register_overhead (size);
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494
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495 return usage;
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496 }
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497
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498 /* Release PTR pointer of SIZE bytes. */
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499
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500 template <class T>
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501 inline void
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502 mem_alloc_description<T>::release_instance_overhead (void *ptr, size_t size,
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503 bool remove_from_map)
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504 {
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505 mem_usage_pair<T> *slot = m_reverse_map->get (ptr);
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506
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507 if (!slot)
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508 {
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509 /* Due to PCH, it can really happen. */
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510 return;
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511 }
|
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512
|
|
|
513 mem_usage_pair<T> usage_pair = *slot;
|
|
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514 usage_pair.usage->release_overhead (size);
|
|
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515
|
|
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516 if (remove_from_map)
|
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517 m_reverse_map->remove (ptr);
|
|
|
518 }
|
|
|
519
|
|
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520 /* Release intance object identified by PTR pointer. */
|
|
|
521
|
|
|
522 template <class T>
|
|
|
523 inline void
|
|
|
524 mem_alloc_description<T>::release_object_overhead (void *ptr)
|
|
|
525 {
|
|
|
526 std::pair <T *, size_t> *entry = m_reverse_object_map->get (ptr);
|
|
|
527 if (entry)
|
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|
528 {
|
|
|
529 entry->first->release_overhead (entry->second);
|
|
|
530 m_reverse_object_map->remove (ptr);
|
|
|
531 }
|
|
|
532 }
|
|
|
533
|
|
|
534 /* Default contructor. */
|
|
|
535
|
|
|
536 template <class T>
|
|
|
537 inline
|
|
|
538 mem_alloc_description<T>::mem_alloc_description ()
|
|
|
539 {
|
|
|
540 m_map = new mem_map_t (13, false, false);
|
|
|
541 m_reverse_map = new reverse_mem_map_t (13, false, false);
|
|
|
542 m_reverse_object_map = new reverse_object_map_t (13, false, false);
|
|
|
543 }
|
|
|
544
|
|
|
545 /* Default destructor. */
|
|
|
546
|
|
|
547 template <class T>
|
|
|
548 inline
|
|
|
549 mem_alloc_description<T>::~mem_alloc_description ()
|
|
|
550 {
|
|
|
551 for (typename mem_map_t::iterator it = m_map->begin (); it != m_map->end ();
|
|
|
552 ++it)
|
|
|
553 {
|
|
|
554 delete (*it).first;
|
|
|
555 delete (*it).second;
|
|
|
556 }
|
|
|
557
|
|
|
558 delete m_map;
|
|
|
559 delete m_reverse_map;
|
|
|
560 delete m_reverse_object_map;
|
|
|
561 }
|
|
|
562
|
|
|
563 /* Get all tracked instances registered by the description. Items are filtered
|
|
|
564 by ORIGIN type, LENGTH is return value where we register the number of
|
|
|
565 elements in the list. If we want to process custom order, CMP comparator
|
|
|
566 can be provided. */
|
|
|
567
|
|
|
568 template <class T>
|
|
|
569 inline
|
|
|
570 typename mem_alloc_description<T>::mem_list_t *
|
|
|
571 mem_alloc_description<T>::get_list (mem_alloc_origin origin, unsigned *length,
|
|
|
572 int (*cmp) (const void *first, const void *second))
|
|
|
573 {
|
|
|
574 /* vec data structure is not used because all vectors generate memory
|
|
|
575 allocation info a it would create a cycle. */
|
|
|
576 size_t element_size = sizeof (mem_list_t);
|
|
|
577 mem_list_t *list = XCNEWVEC (mem_list_t, m_map->elements ());
|
|
|
578 unsigned i = 0;
|
|
|
579
|
|
|
580 for (typename mem_map_t::iterator it = m_map->begin (); it != m_map->end ();
|
|
|
581 ++it)
|
|
|
582 if ((*it).first->m_origin == origin)
|
|
|
583 list[i++] = std::pair<mem_location*, T*> (*it);
|
|
|
584
|
|
|
585 qsort (list, i, element_size, cmp == NULL ? T::compare : cmp);
|
|
|
586 *length = i;
|
|
|
587
|
|
|
588 return list;
|
|
|
589 }
|
|
|
590
|
|
|
591 /* Get sum value for ORIGIN type of allocation for the descriptor. */
|
|
|
592
|
|
|
593 template <class T>
|
|
|
594 inline T
|
|
|
595 mem_alloc_description<T>::get_sum (mem_alloc_origin origin)
|
|
|
596 {
|
|
|
597 unsigned length;
|
|
|
598 mem_list_t *list = get_list (origin, &length);
|
|
|
599 T sum;
|
|
|
600
|
|
|
601 for (unsigned i = 0; i < length; i++)
|
|
|
602 sum = sum + *list[i].second;
|
|
|
603
|
|
|
604 XDELETEVEC (list);
|
|
|
605
|
|
|
606 return sum;
|
|
|
607 }
|
|
|
608
|
|
|
609 /* Dump all tracked instances of type ORIGIN. If we want to process custom
|
|
|
610 order, CMP comparator can be provided. */
|
|
|
611
|
|
|
612 template <class T>
|
|
|
613 inline void
|
|
|
614 mem_alloc_description<T>::dump (mem_alloc_origin origin,
|
|
|
615 int (*cmp) (const void *first,
|
|
|
616 const void *second))
|
|
|
617 {
|
|
|
618 unsigned length;
|
|
|
619
|
|
|
620 fprintf (stderr, "\n");
|
|
|
621
|
|
|
622 mem_list_t *list = get_list (origin, &length, cmp);
|
|
|
623 T total = get_sum (origin);
|
|
|
624
|
|
|
625 T::dump_header (mem_location::get_origin_name (origin));
|
|
|
626 for (int i = length - 1; i >= 0; i--)
|
|
|
627 list[i].second->dump (list[i].first, total);
|
|
|
628
|
|
|
629 total.dump_footer ();
|
|
|
630
|
|
|
631 XDELETEVEC (list);
|
|
|
632
|
|
|
633 fprintf (stderr, "\n");
|
|
|
634 }
|
|
|
635
|
|
|
636 #endif // GCC_MEM_STATS_H
|
