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145
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1 /* Functions for LTO dump tool.
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2 Copyright (C) 2018-2020 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "tm.h"
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24 #include "function.h"
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25 #include "basic-block.h"
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26 #include "tree.h"
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27 #include "gimple.h"
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28 #include "cfg.h"
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29 #include "tree-cfg.h"
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30 #include "tree-pass.h"
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31 #include "tree-streamer.h"
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32 #include "cgraph.h"
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33 #include "opts.h"
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34 #include "debug.h"
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35 #include "lto-partition.h"
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36 #include "tree-pretty-print.h"
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37 #include "lto-common.h"
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38
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39 /* Stores details of symbols for dumping symbol list. */
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40
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41 class symbol_entry
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42 {
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43 public:
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44 symtab_node *node;
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45 symbol_entry (symtab_node *node_): node (node_)
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46 {}
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47
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48 virtual ~symbol_entry ()
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49 {}
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50
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51 char* get_name () const
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52 {
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53 if (flag_lto_dump_demangle)
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54 return xstrdup (node->name ());
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55 else
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56 return xstrdup (node->asm_name ());
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57 }
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58
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59 virtual size_t get_size () const = 0;
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60
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61 virtual void dump ()
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62 {
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63 const char *name = get_name ();
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64 const char *type_name = node->get_symtab_type_string ();
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65 const char *visibility = node->get_visibility_string ();
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66 size_t sz = get_size ();
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67 printf ("%s %s %4" PRIu64 " %s ", type_name, visibility, (uint64_t) sz,
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68 name);
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69 }
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70 };
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71
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72 /* Stores variable specific details of symbols for dumping symbol list. */
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73
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74 class variable_entry: public symbol_entry
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75 {
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76 public:
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77 variable_entry (varpool_node *node_): symbol_entry (node_)
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78 {}
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79
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80 virtual ~variable_entry ()
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81 {}
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82
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83 virtual size_t get_size () const
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84 {
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85 varpool_node *vnode = dyn_cast<varpool_node *> (node);
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86 if (DECL_SIZE (vnode->decl) && tree_fits_shwi_p (DECL_SIZE (vnode->decl)))
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87 return tree_to_shwi (DECL_SIZE (vnode->decl));
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88 return 0;
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89 }
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90
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91 virtual void dump ()
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92 {
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93 symbol_entry :: dump ();
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94 varpool_node *vnode = dyn_cast<varpool_node *> (node);
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95 vnode->get_constructor ();
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96 tree value_tree = DECL_INITIAL (vnode->decl);
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97 if (flag_lto_print_value && value_tree)
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98 print_generic_expr (stdout, value_tree, TDF_NONE);
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99 printf ("\n");
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100 }
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101 };
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102
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103 /* Stores function specific details of symbols for dumping symbol list. */
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104
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105 class function_entry: public symbol_entry
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106 {
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107 public:
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108 function_entry (cgraph_node *node_): symbol_entry (node_)
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109 {}
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110
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111 virtual ~function_entry ()
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112 {}
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113
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114 virtual void dump ()
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115 {
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116 symbol_entry :: dump ();
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117 printf ("\n");
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118 }
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119
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120 virtual size_t get_size () const
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121 {
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122 cgraph_node *cnode = dyn_cast<cgraph_node *> (node);
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123 gcc_assert (cnode);
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124
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125 return (cnode->definition && !cnode->alias)
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126 ? n_basic_blocks_for_fn (DECL_STRUCT_FUNCTION (cnode->decl))
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127 : 0;
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128 }
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129 };
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130
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131 /* Comparing symbols based on size. */
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132
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133 int size_compare (const void *a, const void *b)
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134 {
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135 const symbol_entry *e1 = *(const symbol_entry * const*) a;
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136 const symbol_entry *e2 = *(const symbol_entry * const*) b;
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137
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138 return e1->get_size () - e2->get_size ();
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139 }
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140
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141 /* Comparing symbols based on name. */
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142
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143 int name_compare (const void *a, const void *b)
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144 {
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145 const symbol_entry *e1 = *(const symbol_entry * const*) a;
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146 const symbol_entry *e2 = *(const symbol_entry * const*) b;
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147
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148 return strcmp (e1->get_name (), e2->get_name ());
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149 }
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150
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151 /* Dump list of functions and their details. */
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152
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153 void dump_list_functions (void)
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154 {
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155 auto_vec<symbol_entry *> v;
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156
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157 cgraph_node *cnode;
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158 FOR_EACH_FUNCTION (cnode)
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159 {
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160 if (cnode->definition && !cnode->alias)
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161 cnode->get_untransformed_body ();
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162 symbol_entry *e = new function_entry (cnode);
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163 if (!flag_lto_dump_defined || (cnode->definition && !cnode->alias))
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164 v.safe_push (e);
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165 }
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166
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167 if (flag_lto_size_sort)
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168 v.qsort (size_compare);
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169 else if (flag_lto_name_sort)
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170 v.qsort (name_compare);
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171 if (flag_lto_reverse_sort)
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172 v.reverse ();
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173
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174 printf ("Type Visibility Size Name");
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175 if (flag_lto_print_value)
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176 printf (" Value");
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177 printf ("\n");
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178 int i=0;
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179 symbol_entry* e;
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180 FOR_EACH_VEC_ELT (v, i, e)
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181 {
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182 e->dump ();
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183 delete e;
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184 }
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185 }
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186
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187 /* Dump list of variables and their details. */
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188
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189 void dump_list_variables (void)
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190 {
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191 auto_vec<symbol_entry *> v;
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192
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193 varpool_node *vnode;
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194 FOR_EACH_VARIABLE (vnode)
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195 {
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196 symbol_entry *e = new variable_entry (vnode);
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197 if (!flag_lto_dump_defined || vnode->definition)
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198 v.safe_push (e);
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199 }
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200
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201 if (flag_lto_size_sort)
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202 v.qsort (size_compare);
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203 else if (flag_lto_name_sort)
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204 v.qsort (name_compare);
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205 if (flag_lto_reverse_sort)
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206 v.reverse ();
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207
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208 printf ("\n");
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209 int i=0;
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210 symbol_entry* e;
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211 FOR_EACH_VEC_ELT (v, i, e)
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212 {
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213 e->dump ();
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214 delete e;
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215 }
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216 }
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217
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218 /* Dump symbol table in graphviz format. */
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219 void dump_symtab_graphviz (void)
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220 {
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221 symtab->dump_graphviz (stdout);
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222 }
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223
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224 /* Dump symbol list. */
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225
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226 void dump_list (void)
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227 {
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228 dump_list_functions ();
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229 dump_list_variables ();
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230 return;
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231 }
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232
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233 /* Dump specific variables and functions used in IL. */
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234 void dump_symbol ()
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235 {
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236 symtab_node *node;
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237 printf ("Symbol: %s\n", flag_lto_dump_symbol);
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238 FOR_EACH_SYMBOL (node)
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239 {
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240 if (!strcmp (flag_lto_dump_symbol, node->name ()))
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241 {
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242 node->debug ();
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243 printf ("\n");
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244 }
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245 }
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246 return;
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247 }
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248
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249 /* Dump specific gimple body of specified function. */
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250 void dump_body ()
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251 {
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252 int flag = 0;
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253 dump_flags_t flags = TDF_NONE;
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254 if (flag_dump_level)
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255 flags = parse_dump_option (flag_dump_level, NULL);
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256 if (flags == TDF_ERROR)
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257 {
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258 error_at (input_location, "Level not found, use none, slim, blocks, vops.");
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259 return;
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260 }
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261 cgraph_node *cnode;
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262 FOR_EACH_FUNCTION (cnode)
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263 if (cnode->definition
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264 && !cnode->alias
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265 && !strcmp (cnode->name (), flag_dump_body))
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266 {
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267 printf ("Gimple Body of Function: %s\n", cnode->name ());
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268 cnode->get_untransformed_body ();
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269 debug_function (cnode->decl, flags);
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270 flag = 1;
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271 }
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272 if (!flag)
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273 error_at (input_location, "Function not found.");
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274 return;
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275 }
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276
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277 /* List of command line options for dumping. */
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278 void dump_tool_help ()
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279 {
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280 const char *msg =
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281 "Usage: lto-dump [OPTION]... SUB_COMMAND [OPTION]...\n\n"
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282 "LTO dump tool command line options.\n\n"
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283 " -list [options] Dump the symbol list.\n"
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284 " -demangle Dump the demangled output.\n"
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285 " -defined-only Dump only the defined symbols.\n"
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286 " -print-value Dump initial values of the variables.\n"
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287 " -name-sort Sort the symbols alphabetically.\n"
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288 " -size-sort Sort the symbols according to size.\n"
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289 " -reverse-sort Dump the symbols in reverse order.\n"
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290 " -symbol= Dump the details of specific symbol.\n"
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291 " -objects Dump the details of LTO objects.\n"
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292 " -callgraph Dump the callgraph in graphviz format.\n"
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293 " -type-stats Dump statistics of tree types.\n"
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294 " -tree-stats Dump statistics of trees.\n"
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295 " -gimple-stats Dump statistics of gimple statements.\n"
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296 " -dump-body= Dump the specific gimple body.\n"
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297 " -dump-level= Deciding the optimization level of body.\n"
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298 " -help Display the dump tool help.\n";
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299
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300 fputs (msg, stdout);
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301 return;
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302 }
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303
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304 unsigned int
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305 lto_option_lang_mask (void)
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306 {
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307 return CL_LTODump;
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308 }
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309
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310 /* Functions for dumping various details in LTO dump tool are called
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311 in lto_main(). The purpose of this dump tool is to analyze the LTO
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312 object files. */
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313
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314 void
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315 lto_main (void)
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316 {
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317 quiet_flag = true;
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318 if (flag_lto_dump_tool_help)
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319 dump_tool_help ();
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320
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321 /* LTO is called as a front end, even though it is not a front end.
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322 Because it is called as a front end, TV_PHASE_PARSING and
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323 TV_PARSE_GLOBAL are active, and we need to turn them off while
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324 doing LTO. Later we turn them back on so they are active up in
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325 toplev.c. */
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326
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327 /* Initialize the LTO front end. */
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328 lto_fe_init ();
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329 g_timer = NULL;
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330 /* Read all the symbols and call graph from all the files in the
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331 command line. */
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332 read_cgraph_and_symbols (num_in_fnames, in_fnames);
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333
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334 /* Dump symbol list. */
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335 if (flag_lto_dump_list)
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336 dump_list ();
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337 else if (flag_lto_dump_symbol)
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338 {
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339 /* Dump specific variables and functions used in IL. */
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340 dump_symbol ();
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341 }
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342 else if (flag_lto_gimple_stats)
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343 {
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344 /* Dump gimple statement statistics. */
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345 cgraph_node *node;
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346 FOR_EACH_DEFINED_FUNCTION (node)
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347 node->get_untransformed_body ();
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348 if (!GATHER_STATISTICS)
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349 warning_at (input_location, 0,
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350 "Not configured with "
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351 "%<--enable-gather-detailed-mem-stats%>.");
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352 else
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353 dump_gimple_statistics ();
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354 }
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355 else if (flag_lto_tree_stats)
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356 {
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357 /* Dump tree statistics. */
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358 if (!GATHER_STATISTICS)
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359 warning_at (input_location, 0,
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360 "Not configured with "
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361 "%<--enable-gather-detailed-mem-stats%>.");
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362 else
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363 {
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364 printf ("Tree Statistics\n");
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365 dump_tree_statistics ();
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366 }
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367 }
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368 else if (flag_dump_body)
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369 {
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370 /* Dump specific gimple body of specified function. */
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371 dump_body ();
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372 return;
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373 }
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374 else if (flag_dump_callgraph)
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375 {
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376 dump_symtab_graphviz ();
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377 return;
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378 }
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379 }
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