111
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1 /* A memory statistics tracking infrastructure.
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2 Copyright (C) 2015-2020 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 class mem_location
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35 {
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36 public:
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37 /* Default constructor. */
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38 inline
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39 mem_location () {}
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40
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41 /* Constructor. */
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42 inline
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43 mem_location (mem_alloc_origin origin, bool ggc,
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44 const char *filename = NULL, int line = 0,
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45 const char *function = NULL):
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46 m_filename (filename), m_function (function), m_line (line), m_origin
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47 (origin), m_ggc (ggc) {}
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48
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49 /* Copy constructor. */
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50 inline
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51 mem_location (mem_location &other): m_filename (other.m_filename),
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52 m_function (other.m_function), m_line (other.m_line),
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53 m_origin (other.m_origin), m_ggc (other.m_ggc) {}
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54
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55 /* Compute hash value based on file name, function name and line in
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56 source code. As there is just a single pointer registered for every
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57 constant that points to e.g. the same file name, we can use hash
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58 of the pointer. */
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59 hashval_t
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60 hash ()
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61 {
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62 inchash::hash hash;
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63
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64 hash.add_ptr (m_filename);
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65 hash.add_ptr (m_function);
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66 hash.add_int (m_line);
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67
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68 return hash.end ();
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69 }
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70
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71 /* Return true if the memory location is equal to OTHER. */
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72 int
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73 equal (mem_location &other)
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74 {
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75 return m_filename == other.m_filename && m_function == other.m_function
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76 && m_line == other.m_line;
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77 }
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78
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79 /* Return trimmed filename for the location. */
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80 inline const char *
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81 get_trimmed_filename ()
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82 {
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83 const char *s1 = m_filename;
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84 const char *s2;
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85
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86 while ((s2 = strstr (s1, "gcc/")))
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87 s1 = s2 + 4;
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88
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89 return s1;
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90 }
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91
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92 inline char *
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93 to_string ()
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94 {
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95 unsigned l = strlen (get_trimmed_filename ()) + strlen (m_function)
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96 + LOCATION_LINE_EXTRA_SPACE;
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97
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98 char *s = XNEWVEC (char, l);
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99 sprintf (s, "%s:%i (%s)", get_trimmed_filename (),
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100 m_line, m_function);
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101
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102 s[MIN (LOCATION_LINE_WIDTH, l - 1)] = '\0';
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103
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104 return s;
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105 }
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106
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107 /* Return display name associated to ORIGIN type. */
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108 static const char *
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109 get_origin_name (mem_alloc_origin origin)
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110 {
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111 return mem_alloc_origin_names[(unsigned) origin];
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112 }
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113
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114 /* File name of source code. */
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115 const char *m_filename;
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116 /* Funcation name. */
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117 const char *m_function;
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118 /* Line number in source code. */
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119 int m_line;
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120 /* Origin type. */
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121 mem_alloc_origin m_origin;
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122 /* Flag if used by GGC allocation. */
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123 bool m_ggc;
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124 };
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125
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126 /* Memory usage register to a memory location. */
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127 class mem_usage
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128 {
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129 public:
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130 /* Default constructor. */
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131 mem_usage (): m_allocated (0), m_times (0), m_peak (0), m_instances (1) {}
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132
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133 /* Constructor. */
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134 mem_usage (size_t allocated, size_t times, size_t peak, size_t instances = 0):
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135 m_allocated (allocated), m_times (times), m_peak (peak),
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136 m_instances (instances) {}
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137
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138 /* Register overhead of SIZE bytes. */
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139 inline void
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140 register_overhead (size_t size)
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141 {
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142 m_allocated += size;
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143 m_times++;
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144
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145 if (m_peak < m_allocated)
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146 m_peak = m_allocated;
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147 }
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148
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149 /* Release overhead of SIZE bytes. */
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150 inline void
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151 release_overhead (size_t size)
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152 {
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153 gcc_assert (size <= m_allocated);
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154
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155 m_allocated -= size;
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156 }
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157
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158 /* Sum the usage with SECOND usage. */
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159 mem_usage
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160 operator+ (const mem_usage &second)
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161 {
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162 return mem_usage (m_allocated + second.m_allocated,
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163 m_times + second.m_times,
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164 m_peak + second.m_peak,
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165 m_instances + second.m_instances);
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166 }
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167
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131
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168 /* Equality operator. */
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169 inline bool
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170 operator== (const mem_usage &second) const
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171 {
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172 return (m_allocated == second.m_allocated
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173 && m_peak == second.m_peak
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174 && m_times == second.m_times);
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175 }
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176
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177 /* Comparison operator. */
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178 inline bool
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179 operator< (const mem_usage &second) const
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180 {
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131
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181 if (*this == second)
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182 return false;
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183
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184 return (m_allocated == second.m_allocated ?
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185 (m_peak == second.m_peak ? m_times < second.m_times
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186 : m_peak < second.m_peak) : m_allocated < second.m_allocated);
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187 }
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188
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189 /* Compare wrapper used by qsort method. */
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190 static int
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191 compare (const void *first, const void *second)
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192 {
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193 typedef std::pair<mem_location *, mem_usage *> mem_pair_t;
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194
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195 const mem_pair_t f = *(const mem_pair_t *)first;
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196 const mem_pair_t s = *(const mem_pair_t *)second;
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197
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198 if (*f.second == *s.second)
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199 return 0;
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200
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201 return *f.second < *s.second ? 1 : -1;
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202 }
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203
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204 /* Dump usage coupled to LOC location, where TOTAL is sum of all rows. */
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205 inline void
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206 dump (mem_location *loc, mem_usage &total) const
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207 {
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208 char *location_string = loc->to_string ();
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209
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210 fprintf (stderr, "%-48s " PRsa (9) ":%5.1f%%"
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211 PRsa (9) PRsa (9) ":%5.1f%%%10s\n",
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212 location_string, SIZE_AMOUNT (m_allocated),
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213 get_percent (m_allocated, total.m_allocated),
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214 SIZE_AMOUNT (m_peak), SIZE_AMOUNT (m_times),
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215 get_percent (m_times, total.m_times), loc->m_ggc ? "ggc" : "heap");
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216
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217 free (location_string);
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218 }
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219
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220 /* Dump footer. */
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221 inline void
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222 dump_footer () const
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223 {
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224 fprintf (stderr, "%s" PRsa (53) PRsa (26) "\n", "Total",
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225 SIZE_AMOUNT (m_allocated), SIZE_AMOUNT (m_times));
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226 }
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227
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228 /* Return fraction of NOMINATOR and DENOMINATOR in percent. */
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229 static inline float
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230 get_percent (size_t nominator, size_t denominator)
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231 {
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232 return denominator == 0 ? 0.0f : nominator * 100.0 / denominator;
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233 }
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234
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235 /* Print line made of dashes. */
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236 static inline void
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237 print_dash_line (size_t count = 140)
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238 {
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239 while (count--)
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240 fputc ('-', stderr);
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241 fputc ('\n', stderr);
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242 }
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243
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244 /* Dump header with NAME. */
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245 static inline void
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246 dump_header (const char *name)
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247 {
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248 fprintf (stderr, "%-48s %11s%16s%10s%17s\n", name, "Leak", "Peak",
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249 "Times", "Type");
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250 }
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251
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252 /* Current number of allocated bytes. */
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253 size_t m_allocated;
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254 /* Number of allocations. */
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255 size_t m_times;
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256 /* Peak allocation in bytes. */
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257 size_t m_peak;
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258 /* Number of container instances. */
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259 size_t m_instances;
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260 };
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261
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262 /* Memory usage pair that connectes memory usage and number
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263 of allocated bytes. */
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264 template <class T>
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265 class mem_usage_pair
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266 {
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267 public:
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268 mem_usage_pair (T *usage_, size_t allocated_): usage (usage_),
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269 allocated (allocated_) {}
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270
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271 T *usage;
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272 size_t allocated;
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273 };
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274
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275 /* Memory allocation description. */
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276 template <class T>
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277 class mem_alloc_description
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278 {
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279 public:
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280 struct mem_location_hash : nofree_ptr_hash <mem_location>
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281 {
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282 static hashval_t
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283 hash (value_type l)
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284 {
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285 inchash::hash hstate;
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286
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287 hstate.add_ptr ((const void *)l->m_filename);
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288 hstate.add_ptr (l->m_function);
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289 hstate.add_int (l->m_line);
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290
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291 return hstate.end ();
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292 }
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293
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294 static bool
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295 equal (value_type l1, value_type l2)
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296 {
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297 return (l1->m_filename == l2->m_filename
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298 && l1->m_function == l2->m_function
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299 && l1->m_line == l2->m_line);
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300 }
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301 };
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302
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303 /* Internal class type definitions. */
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304 typedef hash_map <mem_location_hash, T *> mem_map_t;
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305 typedef hash_map <const void *, mem_usage_pair<T> > reverse_mem_map_t;
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306 typedef hash_map <const void *, std::pair<T *, size_t> > reverse_object_map_t;
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307 typedef std::pair <mem_location *, T *> mem_list_t;
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308
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309 /* Default contructor. */
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310 mem_alloc_description ();
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311
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312 /* Default destructor. */
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313 ~mem_alloc_description ();
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314
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315 /* Returns true if instance PTR is registered by the memory description. */
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316 bool contains_descriptor_for_instance (const void *ptr);
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317
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318 /* Return descriptor for instance PTR. */
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319 T *get_descriptor_for_instance (const void *ptr);
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320
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321 /* Register memory allocation descriptor for container PTR which is
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322 described by a memory LOCATION. */
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323 T *register_descriptor (const void *ptr, mem_location *location);
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324
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325 /* Register memory allocation descriptor for container PTR. ORIGIN identifies
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326 type of container and GGC identifes if the allocation is handled in GGC
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327 memory. Each location is identified by file NAME, LINE in source code and
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328 FUNCTION name. */
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329 T *register_descriptor (const void *ptr, mem_alloc_origin origin,
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330 bool ggc, const char *name, int line,
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331 const char *function);
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332
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333 /* Register instance overhead identified by PTR pointer. Allocation takes
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334 SIZE bytes. */
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335 T *register_instance_overhead (size_t size, const void *ptr);
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336
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337 /* For containers (and GGC) where we want to track every instance object,
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338 we register allocation of SIZE bytes, identified by PTR pointer, belonging
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339 to USAGE descriptor. */
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340 void register_object_overhead (T *usage, size_t size, const void *ptr);
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341
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342 /* Release PTR pointer of SIZE bytes. If REMOVE_FROM_MAP is set to true,
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343 remove the instance from reverse map. Return memory usage that belongs
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344 to this memory description. */
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345 T *release_instance_overhead (void *ptr, size_t size,
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346 bool remove_from_map = false);
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347
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348 /* Release instance object identified by PTR pointer. */
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349 void release_object_overhead (void *ptr);
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350
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351 /* Unregister a memory allocation descriptor registered with
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352 register_descriptor (remove from reverse map), unless it is
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353 unregistered through release_instance_overhead with
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354 REMOVE_FROM_MAP = true. */
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355 void unregister_descriptor (void *ptr);
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356
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357 /* Get sum value for ORIGIN type of allocation for the descriptor. */
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358 T get_sum (mem_alloc_origin origin);
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359
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360 /* Get all tracked instances registered by the description. Items
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361 are filtered by ORIGIN type, LENGTH is return value where we register
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362 the number of elements in the list. If we want to process custom order,
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363 CMP comparator can be provided. */
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364 mem_list_t *get_list (mem_alloc_origin origin, unsigned *length);
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365
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366 /* Dump all tracked instances of type ORIGIN. If we want to process custom
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367 order, CMP comparator can be provided. */
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368 void dump (mem_alloc_origin origin);
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369
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370 /* Reverse object map used for every object allocation mapping. */
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371 reverse_object_map_t *m_reverse_object_map;
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372
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373 private:
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374 /* Register overhead of SIZE bytes of ORIGIN type. PTR pointer is allocated
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375 in NAME source file, at LINE in source code, in FUNCTION. */
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376 T *register_overhead (size_t size, mem_alloc_origin origin, const char *name,
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377 int line, const char *function, const void *ptr);
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378
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379 /* Allocation location coupled to the description. */
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380 mem_location m_location;
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381
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382 /* Location to usage mapping. */
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383 mem_map_t *m_map;
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384
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385 /* Reverse pointer to usage mapping. */
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386 reverse_mem_map_t *m_reverse_map;
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387 };
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388
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389 /* Returns true if instance PTR is registered by the memory description. */
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390
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391 template <class T>
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392 inline bool
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393 mem_alloc_description<T>::contains_descriptor_for_instance (const void *ptr)
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394 {
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395 return m_reverse_map->get (ptr);
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396 }
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397
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398 /* Return descriptor for instance PTR. */
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399
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400 template <class T>
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401 inline T*
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402 mem_alloc_description<T>::get_descriptor_for_instance (const void *ptr)
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403 {
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404 return m_reverse_map->get (ptr) ? (*m_reverse_map->get (ptr)).usage : NULL;
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405 }
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406
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145
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407 /* Register memory allocation descriptor for container PTR which is
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408 described by a memory LOCATION. */
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409
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410 template <class T>
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411 inline T*
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412 mem_alloc_description<T>::register_descriptor (const void *ptr,
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413 mem_location *location)
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414 {
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415 T *usage = NULL;
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416
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417 T **slot = m_map->get (location);
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418 if (slot)
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419 {
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420 delete location;
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421 usage = *slot;
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422 usage->m_instances++;
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423 }
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424 else
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425 {
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426 usage = new T ();
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427 m_map->put (location, usage);
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428 }
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429
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430 if (!m_reverse_map->get (ptr))
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431 m_reverse_map->put (ptr, mem_usage_pair<T> (usage, 0));
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432
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433 return usage;
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434 }
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435
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436 /* Register memory allocation descriptor for container PTR. ORIGIN identifies
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437 type of container and GGC identifes if the allocation is handled in GGC
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438 memory. Each location is identified by file NAME, LINE in source code and
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439 FUNCTION name. */
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440
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441 template <class T>
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442 inline T*
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443 mem_alloc_description<T>::register_descriptor (const void *ptr,
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444 mem_alloc_origin origin,
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445 bool ggc,
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446 const char *filename,
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447 int line,
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448 const char *function)
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449 {
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450 mem_location *l = new mem_location (origin, ggc, filename, line, function);
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451 return register_descriptor (ptr, l);
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452 }
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453
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454 /* Register instance overhead identified by PTR pointer. Allocation takes
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455 SIZE bytes. */
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456
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457 template <class T>
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458 inline T*
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459 mem_alloc_description<T>::register_instance_overhead (size_t size,
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460 const void *ptr)
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461 {
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462 mem_usage_pair <T> *slot = m_reverse_map->get (ptr);
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463 if (!slot)
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464 {
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465 /* Due to PCH, it can really happen. */
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466 return NULL;
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467 }
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468
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469 T *usage = (*slot).usage;
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470 usage->register_overhead (size);
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471
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472 return usage;
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473 }
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474
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475 /* For containers (and GGC) where we want to track every instance object,
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476 we register allocation of SIZE bytes, identified by PTR pointer, belonging
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477 to USAGE descriptor. */
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478
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479 template <class T>
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480 void
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481 mem_alloc_description<T>::register_object_overhead (T *usage, size_t size,
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482 const void *ptr)
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483 {
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484 /* In case of GGC, it is possible to have already occupied the memory
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485 location. */
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486 m_reverse_object_map->put (ptr, std::pair<T *, size_t> (usage, size));
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487 }
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488
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489 /* Register overhead of SIZE bytes of ORIGIN type. PTR pointer is allocated
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490 in NAME source file, at LINE in source code, in FUNCTION. */
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491
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492 template <class T>
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493 inline T*
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494 mem_alloc_description<T>::register_overhead (size_t size,
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495 mem_alloc_origin origin,
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496 const char *filename,
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497 int line,
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498 const char *function,
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499 const void *ptr)
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500 {
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501 T *usage = register_descriptor (ptr, origin, filename, line, function);
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502 usage->register_overhead (size);
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503
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504 return usage;
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505 }
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506
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507 /* Release PTR pointer of SIZE bytes. */
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508
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509 template <class T>
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145
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510 inline T *
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111
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511 mem_alloc_description<T>::release_instance_overhead (void *ptr, size_t size,
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512 bool remove_from_map)
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513 {
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514 mem_usage_pair<T> *slot = m_reverse_map->get (ptr);
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515
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516 if (!slot)
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517 {
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518 /* Due to PCH, it can really happen. */
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145
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519 return NULL;
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111
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520 }
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521
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145
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522 T *usage = (*slot).usage;
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523 usage->release_overhead (size);
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111
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524
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525 if (remove_from_map)
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526 m_reverse_map->remove (ptr);
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145
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527
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528 return usage;
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111
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529 }
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530
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145
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531 /* Release instance object identified by PTR pointer. */
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111
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532
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533 template <class T>
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534 inline void
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535 mem_alloc_description<T>::release_object_overhead (void *ptr)
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536 {
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537 std::pair <T *, size_t> *entry = m_reverse_object_map->get (ptr);
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145
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538 entry->first->release_overhead (entry->second);
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539 m_reverse_object_map->remove (ptr);
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540 }
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541
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542 /* Unregister a memory allocation descriptor registered with
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543 register_descriptor (remove from reverse map), unless it is
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544 unregistered through release_instance_overhead with
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545 REMOVE_FROM_MAP = true. */
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546 template <class T>
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547 inline void
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548 mem_alloc_description<T>::unregister_descriptor (void *ptr)
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549 {
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550 m_reverse_map->remove (ptr);
|
111
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551 }
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552
|
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553 /* Default contructor. */
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554
|
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555 template <class T>
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|
556 inline
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557 mem_alloc_description<T>::mem_alloc_description ()
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558 {
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145
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559 m_map = new mem_map_t (13, false, false, false);
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560 m_reverse_map = new reverse_mem_map_t (13, false, false, false);
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561 m_reverse_object_map = new reverse_object_map_t (13, false, false, false);
|
111
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562 }
|
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563
|
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564 /* Default destructor. */
|
|
565
|
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566 template <class T>
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|
567 inline
|
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568 mem_alloc_description<T>::~mem_alloc_description ()
|
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569 {
|
|
570 for (typename mem_map_t::iterator it = m_map->begin (); it != m_map->end ();
|
|
571 ++it)
|
|
572 {
|
|
573 delete (*it).first;
|
|
574 delete (*it).second;
|
|
575 }
|
|
576
|
|
577 delete m_map;
|
|
578 delete m_reverse_map;
|
|
579 delete m_reverse_object_map;
|
|
580 }
|
|
581
|
|
582 /* Get all tracked instances registered by the description. Items are filtered
|
|
583 by ORIGIN type, LENGTH is return value where we register the number of
|
|
584 elements in the list. If we want to process custom order, CMP comparator
|
|
585 can be provided. */
|
|
586
|
|
587 template <class T>
|
|
588 inline
|
|
589 typename mem_alloc_description<T>::mem_list_t *
|
145
|
590 mem_alloc_description<T>::get_list (mem_alloc_origin origin, unsigned *length)
|
111
|
591 {
|
|
592 /* vec data structure is not used because all vectors generate memory
|
|
593 allocation info a it would create a cycle. */
|
|
594 size_t element_size = sizeof (mem_list_t);
|
|
595 mem_list_t *list = XCNEWVEC (mem_list_t, m_map->elements ());
|
|
596 unsigned i = 0;
|
|
597
|
|
598 for (typename mem_map_t::iterator it = m_map->begin (); it != m_map->end ();
|
|
599 ++it)
|
|
600 if ((*it).first->m_origin == origin)
|
|
601 list[i++] = std::pair<mem_location*, T*> (*it);
|
|
602
|
145
|
603 qsort (list, i, element_size, T::compare);
|
111
|
604 *length = i;
|
|
605
|
|
606 return list;
|
|
607 }
|
|
608
|
|
609 /* Get sum value for ORIGIN type of allocation for the descriptor. */
|
|
610
|
|
611 template <class T>
|
|
612 inline T
|
|
613 mem_alloc_description<T>::get_sum (mem_alloc_origin origin)
|
|
614 {
|
|
615 unsigned length;
|
|
616 mem_list_t *list = get_list (origin, &length);
|
|
617 T sum;
|
|
618
|
|
619 for (unsigned i = 0; i < length; i++)
|
|
620 sum = sum + *list[i].second;
|
|
621
|
|
622 XDELETEVEC (list);
|
|
623
|
|
624 return sum;
|
|
625 }
|
|
626
|
|
627 /* Dump all tracked instances of type ORIGIN. If we want to process custom
|
|
628 order, CMP comparator can be provided. */
|
|
629
|
|
630 template <class T>
|
|
631 inline void
|
145
|
632 mem_alloc_description<T>::dump (mem_alloc_origin origin)
|
111
|
633 {
|
|
634 unsigned length;
|
|
635
|
|
636 fprintf (stderr, "\n");
|
|
637
|
145
|
638 mem_list_t *list = get_list (origin, &length);
|
111
|
639 T total = get_sum (origin);
|
|
640
|
145
|
641 T::print_dash_line ();
|
|
642 T::dump_header (mem_location::get_origin_name (origin));
|
|
643 T::print_dash_line ();
|
|
644 for (int i = length - 1; i >= 0; i--)
|
|
645 list[i].second->dump (list[i].first, total);
|
|
646 T::print_dash_line ();
|
|
647
|
111
|
648 T::dump_header (mem_location::get_origin_name (origin));
|
145
|
649 T::print_dash_line ();
|
111
|
650 total.dump_footer ();
|
145
|
651 T::print_dash_line ();
|
111
|
652
|
|
653 XDELETEVEC (list);
|
|
654
|
|
655 fprintf (stderr, "\n");
|
|
656 }
|
|
657
|
|
658 #endif // GCC_MEM_STATS_H
|