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111
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1 /* GCC instrumentation plugin for ThreadSanitizer.
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2 Copyright (C) 2011-2017 Free Software Foundation, Inc.
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3 Contributed by Dmitry Vyukov <dvyukov@google.com>
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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
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22 #include "config.h"
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23 #include "system.h"
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24 #include "coretypes.h"
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25 #include "backend.h"
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26 #include "rtl.h"
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27 #include "tree.h"
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28 #include "memmodel.h"
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29 #include "gimple.h"
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30 #include "tree-pass.h"
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31 #include "ssa.h"
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32 #include "cgraph.h"
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33 #include "fold-const.h"
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34 #include "gimplify.h"
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35 #include "gimple-iterator.h"
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36 #include "gimplify-me.h"
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37 #include "tree-cfg.h"
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38 #include "tree-iterator.h"
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39 #include "tree-ssa-propagate.h"
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40 #include "tree-ssa-loop-ivopts.h"
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41 #include "tree-eh.h"
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42 #include "tsan.h"
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43 #include "stringpool.h"
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44 #include "attribs.h"
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45 #include "asan.h"
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46 #include "builtins.h"
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47 #include "target.h"
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48
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49 /* Number of instrumented memory accesses in the current function. */
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50
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51 /* Builds the following decl
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52 void __tsan_read/writeX (void *addr); */
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53
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54 static tree
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55 get_memory_access_decl (bool is_write, unsigned size)
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56 {
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57 enum built_in_function fcode;
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58
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59 if (size <= 1)
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60 fcode = is_write ? BUILT_IN_TSAN_WRITE1
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61 : BUILT_IN_TSAN_READ1;
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62 else if (size <= 3)
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63 fcode = is_write ? BUILT_IN_TSAN_WRITE2
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64 : BUILT_IN_TSAN_READ2;
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65 else if (size <= 7)
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66 fcode = is_write ? BUILT_IN_TSAN_WRITE4
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67 : BUILT_IN_TSAN_READ4;
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68 else if (size <= 15)
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69 fcode = is_write ? BUILT_IN_TSAN_WRITE8
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70 : BUILT_IN_TSAN_READ8;
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71 else
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72 fcode = is_write ? BUILT_IN_TSAN_WRITE16
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73 : BUILT_IN_TSAN_READ16;
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74
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75 return builtin_decl_implicit (fcode);
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76 }
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77
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78 /* Check as to whether EXPR refers to a store to vptr. */
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79
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80 static tree
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81 is_vptr_store (gimple *stmt, tree expr, bool is_write)
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82 {
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83 if (is_write == true
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84 && gimple_assign_single_p (stmt)
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85 && TREE_CODE (expr) == COMPONENT_REF)
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86 {
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87 tree field = TREE_OPERAND (expr, 1);
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88 if (TREE_CODE (field) == FIELD_DECL
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89 && DECL_VIRTUAL_P (field))
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90 return gimple_assign_rhs1 (stmt);
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91 }
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92 return NULL;
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93 }
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94
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95 /* Instruments EXPR if needed. If any instrumentation is inserted,
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96 return true. */
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97
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98 static bool
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99 instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
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100 {
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101 tree base, rhs, expr_ptr, builtin_decl;
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102 basic_block bb;
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103 HOST_WIDE_INT size;
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104 gimple *stmt, *g;
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105 gimple_seq seq;
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106 location_t loc;
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107 unsigned int align;
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108
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109 size = int_size_in_bytes (TREE_TYPE (expr));
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110 if (size <= 0)
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111 return false;
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112
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113 HOST_WIDE_INT bitsize, bitpos;
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114 tree offset;
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115 machine_mode mode;
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116 int unsignedp, reversep, volatilep = 0;
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117 base = get_inner_reference (expr, &bitsize, &bitpos, &offset, &mode,
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118 &unsignedp, &reversep, &volatilep);
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119
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120 /* No need to instrument accesses to decls that don't escape,
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121 they can't escape to other threads then. */
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122 if (DECL_P (base) && !is_global_var (base))
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123 {
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124 struct pt_solution pt;
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125 memset (&pt, 0, sizeof (pt));
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126 pt.escaped = 1;
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127 pt.ipa_escaped = flag_ipa_pta != 0;
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128 if (!pt_solution_includes (&pt, base))
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129 return false;
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130 if (!may_be_aliased (base))
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131 return false;
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132 }
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133
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134 if (TREE_READONLY (base) || (VAR_P (base) && DECL_HARD_REGISTER (base)))
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135 return false;
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136
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137 stmt = gsi_stmt (gsi);
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138 loc = gimple_location (stmt);
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139 rhs = is_vptr_store (stmt, expr, is_write);
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140
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141 if ((TREE_CODE (expr) == COMPONENT_REF
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142 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
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143 || TREE_CODE (expr) == BIT_FIELD_REF)
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144 {
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145 base = TREE_OPERAND (expr, 0);
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146 if (TREE_CODE (expr) == COMPONENT_REF)
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147 {
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148 expr = TREE_OPERAND (expr, 1);
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149 if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
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150 expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
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151 if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
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152 || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
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153 || !tree_fits_uhwi_p (DECL_SIZE (expr)))
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154 return false;
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155 bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
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156 + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
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157 bitsize = tree_to_uhwi (DECL_SIZE (expr));
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158 }
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159 else
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160 {
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161 if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
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162 || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
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163 return false;
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164 bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
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165 bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
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166 }
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167 if (bitpos < 0 || bitsize <= 0)
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168 return false;
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169 size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
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170 / BITS_PER_UNIT;
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171 if (may_be_nonaddressable_p (base))
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172 return false;
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173 align = get_object_alignment (base);
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174 if (align < BITS_PER_UNIT)
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175 return false;
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176 bitpos = bitpos & ~(BITS_PER_UNIT - 1);
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177 if ((align - 1) & bitpos)
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178 {
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179 align = (align - 1) & bitpos;
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180 align = least_bit_hwi (align);
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181 }
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182 expr = build_fold_addr_expr (unshare_expr (base));
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183 expr = build2 (MEM_REF, char_type_node, expr,
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184 build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
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185 expr_ptr = build_fold_addr_expr (expr);
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186 }
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187 else
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188 {
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189 if (may_be_nonaddressable_p (expr))
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190 return false;
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191 align = get_object_alignment (expr);
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192 if (align < BITS_PER_UNIT)
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193 return false;
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194 expr_ptr = build_fold_addr_expr (unshare_expr (expr));
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195 }
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196 expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
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197 if ((size & (size - 1)) != 0 || size > 16
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198 || align < MIN (size, 8) * BITS_PER_UNIT)
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199 {
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200 builtin_decl = builtin_decl_implicit (is_write
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201 ? BUILT_IN_TSAN_WRITE_RANGE
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202 : BUILT_IN_TSAN_READ_RANGE);
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203 g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
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204 }
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205 else if (rhs == NULL)
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206 g = gimple_build_call (get_memory_access_decl (is_write, size),
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207 1, expr_ptr);
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208 else
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209 {
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210 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
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211 g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
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212 }
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213 gimple_set_location (g, loc);
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214 gimple_seq_add_stmt_without_update (&seq, g);
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215 /* Instrumentation for assignment of a function result
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216 must be inserted after the call. Instrumentation for
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217 reads of function arguments must be inserted before the call.
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218 That's because the call can contain synchronization. */
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219 if (is_gimple_call (stmt) && is_write)
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220 {
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221 /* If the call can throw, it must be the last stmt in
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222 a basic block, so the instrumented stmts need to be
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223 inserted in successor bbs. */
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224 if (is_ctrl_altering_stmt (stmt))
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225 {
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226 edge e;
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227
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228 bb = gsi_bb (gsi);
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229 e = find_fallthru_edge (bb->succs);
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230 if (e)
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231 gsi_insert_seq_on_edge_immediate (e, seq);
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232 }
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233 else
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234 gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
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235 }
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236 else
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237 gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
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238
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239 return true;
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240 }
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241
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242 /* Actions for sync/atomic builtin transformations. */
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243 enum tsan_atomic_action
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244 {
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245 check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
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246 bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst,
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247 bool_clear, bool_test_and_set
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248 };
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249
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250 /* Table how to map sync/atomic builtins to their corresponding
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251 tsan equivalents. */
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252 static const struct tsan_map_atomic
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253 {
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254 enum built_in_function fcode, tsan_fcode;
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255 enum tsan_atomic_action action;
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256 enum tree_code code;
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257 } tsan_atomic_table[] =
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258 {
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259 #define TRANSFORM(fcode, tsan_fcode, action, code) \
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260 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
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261 #define CHECK_LAST(fcode, tsan_fcode) \
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262 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
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263 #define ADD_SEQ_CST(fcode, tsan_fcode) \
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264 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
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265 #define ADD_ACQUIRE(fcode, tsan_fcode) \
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266 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
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267 #define WEAK_CAS(fcode, tsan_fcode) \
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268 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
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269 #define STRONG_CAS(fcode, tsan_fcode) \
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270 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
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271 #define BOOL_CAS(fcode, tsan_fcode) \
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272 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
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273 #define VAL_CAS(fcode, tsan_fcode) \
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274 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
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275 #define LOCK_RELEASE(fcode, tsan_fcode) \
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276 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
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277 #define FETCH_OP(fcode, tsan_fcode, code) \
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278 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
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279 #define FETCH_OPS(fcode, tsan_fcode, code) \
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280 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
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281 #define BOOL_CLEAR(fcode, tsan_fcode) \
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282 TRANSFORM (fcode, tsan_fcode, bool_clear, ERROR_MARK)
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283 #define BOOL_TEST_AND_SET(fcode, tsan_fcode) \
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284 TRANSFORM (fcode, tsan_fcode, bool_test_and_set, ERROR_MARK)
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285
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286 CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
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287 CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
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288 CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
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289 CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
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290 CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
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291 CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
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292 CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
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293 CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
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294 CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
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295 CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
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296 CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
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297 CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
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298 CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
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299 CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
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300 CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
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301 CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
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302 CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
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303 CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
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304 CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
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305 CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
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306 CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
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307 CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
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308 CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
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309 CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
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310 CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
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311 CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
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312 CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
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313 CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
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314 CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
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315 CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
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316 CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
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317 CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
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318 CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
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319 CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
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320 CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
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321 CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
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322 CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
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323 CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
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324 CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
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325 CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
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326 CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
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327 CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
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328 CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
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329 CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
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330 CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
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331
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332 CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
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333 CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
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334
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|
|
335 FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
|
|
|
336 FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
|
|
|
337 FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
|
|
|
338 FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
|
|
|
339 FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
|
|
|
340 FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
|
|
|
341 FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
|
|
|
342 FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
|
|
|
343 FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
|
|
|
344 FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
|
|
|
345 FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
|
|
|
346 FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
|
|
|
347 FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
|
|
|
348 FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
|
|
|
349 FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
|
|
|
350 FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
|
|
|
351 FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
|
|
|
352 FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
|
|
|
353 FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
|
|
|
354 FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
|
|
|
355 FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
356 FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
357 FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
358 FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
359 FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
360 FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
361 FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
362 FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
363 FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
364 FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
365
|
|
|
366 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
|
|
|
367 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
|
|
|
368 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
|
|
|
369 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
|
|
|
370 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
|
|
|
371
|
|
|
372 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
|
|
|
373 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
|
|
|
374 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
|
|
|
375 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
|
|
|
376 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
|
|
|
377 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
|
|
|
378 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
|
|
|
379 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
|
|
|
380 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
|
|
|
381 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
|
|
|
382 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
|
|
|
383 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
|
|
|
384 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
|
|
|
385 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
|
|
|
386 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
|
|
|
387 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
|
|
|
388 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
|
|
|
389 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
|
|
|
390 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
|
|
|
391 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
|
|
|
392 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
|
|
|
393 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
|
|
|
394 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
|
|
|
395 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
|
|
|
396 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
|
|
|
397 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
|
|
|
398 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
|
|
|
399 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
|
|
|
400 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
|
|
|
401 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
|
|
|
402
|
|
|
403 ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
|
|
|
404
|
|
|
405 FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
|
|
|
406 FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
|
|
|
407 FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
|
|
|
408 FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
|
|
|
409 FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
|
|
|
410 FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
|
|
|
411 FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
|
|
|
412 FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
|
|
|
413 FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
|
|
|
414 FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
|
|
|
415 FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
|
|
|
416 FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
|
|
|
417 FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
|
|
|
418 FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
|
|
|
419 FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
|
|
|
420 FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
|
|
|
421 FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
|
|
|
422 FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
|
|
|
423 FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
|
|
|
424 FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
|
|
|
425 FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
426 FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
427 FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
428 FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
429 FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
430 FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
431 FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
432 FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
433 FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
434 FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
435
|
|
|
436 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
|
|
|
437 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
|
|
|
438 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
|
|
|
439 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
|
|
|
440 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
|
|
|
441
|
|
|
442 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
|
|
|
443 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
|
|
|
444 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
|
|
|
445 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
|
|
|
446 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
|
|
|
447 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
|
|
|
448 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
|
|
|
449 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
|
|
|
450 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
|
|
|
451
|
|
|
452 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
|
|
|
453 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
|
|
|
454 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
|
|
|
455 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
|
|
|
456 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
|
|
|
457 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
|
|
|
458 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
|
|
|
459 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
|
|
|
460 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
|
|
|
461 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
|
|
|
462
|
|
|
463 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
|
|
|
464 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
|
|
|
465 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
|
|
|
466 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
|
|
|
467 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
|
|
|
468 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
|
|
|
469
|
|
|
470 LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
|
|
|
471 LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
|
|
|
472 LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
|
|
|
473 LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
|
|
|
474 LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE),
|
|
|
475
|
|
|
476 BOOL_CLEAR (ATOMIC_CLEAR, TSAN_ATOMIC8_STORE),
|
|
|
477
|
|
|
478 BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET, TSAN_ATOMIC8_EXCHANGE)
|
|
|
479 };
|
|
|
480
|
|
|
481 /* Instrument an atomic builtin. */
|
|
|
482
|
|
|
483 static void
|
|
|
484 instrument_builtin_call (gimple_stmt_iterator *gsi)
|
|
|
485 {
|
|
|
486 gimple *stmt = gsi_stmt (*gsi), *g;
|
|
|
487 tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
|
|
|
488 enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
|
|
|
489 unsigned int i, num = gimple_call_num_args (stmt), j;
|
|
|
490 for (j = 0; j < 6 && j < num; j++)
|
|
|
491 args[j] = gimple_call_arg (stmt, j);
|
|
|
492 for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
|
|
|
493 if (fcode != tsan_atomic_table[i].fcode)
|
|
|
494 continue;
|
|
|
495 else
|
|
|
496 {
|
|
|
497 tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
|
|
|
498 if (decl == NULL_TREE)
|
|
|
499 return;
|
|
|
500 switch (tsan_atomic_table[i].action)
|
|
|
501 {
|
|
|
502 case check_last:
|
|
|
503 case fetch_op:
|
|
|
504 last_arg = gimple_call_arg (stmt, num - 1);
|
|
|
505 if (tree_fits_uhwi_p (last_arg)
|
|
|
506 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
|
|
|
507 return;
|
|
|
508 gimple_call_set_fndecl (stmt, decl);
|
|
|
509 update_stmt (stmt);
|
|
|
510 maybe_clean_eh_stmt (stmt);
|
|
|
511 if (tsan_atomic_table[i].action == fetch_op)
|
|
|
512 {
|
|
|
513 args[1] = gimple_call_arg (stmt, 1);
|
|
|
514 goto adjust_result;
|
|
|
515 }
|
|
|
516 return;
|
|
|
517 case add_seq_cst:
|
|
|
518 case add_acquire:
|
|
|
519 case fetch_op_seq_cst:
|
|
|
520 gcc_assert (num <= 2);
|
|
|
521 for (j = 0; j < num; j++)
|
|
|
522 args[j] = gimple_call_arg (stmt, j);
|
|
|
523 for (; j < 2; j++)
|
|
|
524 args[j] = NULL_TREE;
|
|
|
525 args[num] = build_int_cst (NULL_TREE,
|
|
|
526 tsan_atomic_table[i].action
|
|
|
527 != add_acquire
|
|
|
528 ? MEMMODEL_SEQ_CST
|
|
|
529 : MEMMODEL_ACQUIRE);
|
|
|
530 update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
|
|
|
531 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
532 stmt = gsi_stmt (*gsi);
|
|
|
533 if (tsan_atomic_table[i].action == fetch_op_seq_cst)
|
|
|
534 {
|
|
|
535 adjust_result:
|
|
|
536 lhs = gimple_call_lhs (stmt);
|
|
|
537 if (lhs == NULL_TREE)
|
|
|
538 return;
|
|
|
539 if (!useless_type_conversion_p (TREE_TYPE (lhs),
|
|
|
540 TREE_TYPE (args[1])))
|
|
|
541 {
|
|
|
542 tree var = make_ssa_name (TREE_TYPE (lhs));
|
|
|
543 g = gimple_build_assign (var, NOP_EXPR, args[1]);
|
|
|
544 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
545 args[1] = var;
|
|
|
546 }
|
|
|
547 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
|
|
|
548 /* BIT_NOT_EXPR stands for NAND. */
|
|
|
549 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
|
|
|
550 {
|
|
|
551 tree var = make_ssa_name (TREE_TYPE (lhs));
|
|
|
552 g = gimple_build_assign (var, BIT_AND_EXPR,
|
|
|
553 gimple_call_lhs (stmt), args[1]);
|
|
|
554 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
555 g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
|
|
|
556 }
|
|
|
557 else
|
|
|
558 g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
|
|
|
559 gimple_call_lhs (stmt), args[1]);
|
|
|
560 update_stmt (stmt);
|
|
|
561 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
562 }
|
|
|
563 return;
|
|
|
564 case weak_cas:
|
|
|
565 if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
|
|
|
566 continue;
|
|
|
567 /* FALLTHRU */
|
|
|
568 case strong_cas:
|
|
|
569 gcc_assert (num == 6);
|
|
|
570 for (j = 0; j < 6; j++)
|
|
|
571 args[j] = gimple_call_arg (stmt, j);
|
|
|
572 if (tree_fits_uhwi_p (args[4])
|
|
|
573 && memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST)
|
|
|
574 return;
|
|
|
575 if (tree_fits_uhwi_p (args[5])
|
|
|
576 && memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST)
|
|
|
577 return;
|
|
|
578 update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
|
|
|
579 args[4], args[5]);
|
|
|
580 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
581 return;
|
|
|
582 case bool_cas:
|
|
|
583 case val_cas:
|
|
|
584 gcc_assert (num == 3);
|
|
|
585 for (j = 0; j < 3; j++)
|
|
|
586 args[j] = gimple_call_arg (stmt, j);
|
|
|
587 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
|
|
|
588 t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
|
|
|
589 t = create_tmp_var (t);
|
|
|
590 mark_addressable (t);
|
|
|
591 if (!useless_type_conversion_p (TREE_TYPE (t),
|
|
|
592 TREE_TYPE (args[1])))
|
|
|
593 {
|
|
|
594 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
|
|
|
595 NOP_EXPR, args[1]);
|
|
|
596 gsi_insert_before (gsi, g, GSI_SAME_STMT);
|
|
|
597 args[1] = gimple_assign_lhs (g);
|
|
|
598 }
|
|
|
599 g = gimple_build_assign (t, args[1]);
|
|
|
600 gsi_insert_before (gsi, g, GSI_SAME_STMT);
|
|
|
601 lhs = gimple_call_lhs (stmt);
|
|
|
602 update_gimple_call (gsi, decl, 5, args[0],
|
|
|
603 build_fold_addr_expr (t), args[2],
|
|
|
604 build_int_cst (NULL_TREE,
|
|
|
605 MEMMODEL_SEQ_CST),
|
|
|
606 build_int_cst (NULL_TREE,
|
|
|
607 MEMMODEL_SEQ_CST));
|
|
|
608 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
609 if (tsan_atomic_table[i].action == val_cas && lhs)
|
|
|
610 {
|
|
|
611 tree cond;
|
|
|
612 stmt = gsi_stmt (*gsi);
|
|
|
613 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
|
|
|
614 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
615 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
|
|
|
616 cond = build2 (NE_EXPR, boolean_type_node, t,
|
|
|
617 build_int_cst (TREE_TYPE (t), 0));
|
|
|
618 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
|
|
|
619 gimple_assign_lhs (g));
|
|
|
620 gimple_call_set_lhs (stmt, t);
|
|
|
621 update_stmt (stmt);
|
|
|
622 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
623 }
|
|
|
624 return;
|
|
|
625 case lock_release:
|
|
|
626 gcc_assert (num == 1);
|
|
|
627 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
|
|
|
628 t = TREE_VALUE (TREE_CHAIN (t));
|
|
|
629 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
|
|
|
630 build_int_cst (t, 0),
|
|
|
631 build_int_cst (NULL_TREE,
|
|
|
632 MEMMODEL_RELEASE));
|
|
|
633 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
634 return;
|
|
|
635 case bool_clear:
|
|
|
636 case bool_test_and_set:
|
|
|
637 if (BOOL_TYPE_SIZE != 8)
|
|
|
638 {
|
|
|
639 decl = NULL_TREE;
|
|
|
640 for (j = 1; j < 5; j++)
|
|
|
641 if (BOOL_TYPE_SIZE == (8 << j))
|
|
|
642 {
|
|
|
643 enum built_in_function tsan_fcode
|
|
|
644 = (enum built_in_function)
|
|
|
645 (tsan_atomic_table[i].tsan_fcode + j);
|
|
|
646 decl = builtin_decl_implicit (tsan_fcode);
|
|
|
647 break;
|
|
|
648 }
|
|
|
649 if (decl == NULL_TREE)
|
|
|
650 return;
|
|
|
651 }
|
|
|
652 last_arg = gimple_call_arg (stmt, num - 1);
|
|
|
653 if (tree_fits_uhwi_p (last_arg)
|
|
|
654 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
|
|
|
655 return;
|
|
|
656 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
|
|
|
657 t = TREE_VALUE (TREE_CHAIN (t));
|
|
|
658 if (tsan_atomic_table[i].action == bool_clear)
|
|
|
659 {
|
|
|
660 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
|
|
|
661 build_int_cst (t, 0), last_arg);
|
|
|
662 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
663 return;
|
|
|
664 }
|
|
|
665 t = build_int_cst (t, targetm.atomic_test_and_set_trueval);
|
|
|
666 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
|
|
|
667 t, last_arg);
|
|
|
668 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
669 stmt = gsi_stmt (*gsi);
|
|
|
670 lhs = gimple_call_lhs (stmt);
|
|
|
671 if (lhs == NULL_TREE)
|
|
|
672 return;
|
|
|
673 if (targetm.atomic_test_and_set_trueval != 1
|
|
|
674 || !useless_type_conversion_p (TREE_TYPE (lhs),
|
|
|
675 TREE_TYPE (t)))
|
|
|
676 {
|
|
|
677 tree new_lhs = make_ssa_name (TREE_TYPE (t));
|
|
|
678 gimple_call_set_lhs (stmt, new_lhs);
|
|
|
679 if (targetm.atomic_test_and_set_trueval != 1)
|
|
|
680 g = gimple_build_assign (lhs, NE_EXPR, new_lhs,
|
|
|
681 build_int_cst (TREE_TYPE (t), 0));
|
|
|
682 else
|
|
|
683 g = gimple_build_assign (lhs, NOP_EXPR, new_lhs);
|
|
|
684 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
685 update_stmt (stmt);
|
|
|
686 }
|
|
|
687 return;
|
|
|
688 default:
|
|
|
689 continue;
|
|
|
690 }
|
|
|
691 }
|
|
|
692 }
|
|
|
693
|
|
|
694 /* Instruments the gimple pointed to by GSI. Return
|
|
|
695 true if func entry/exit should be instrumented. */
|
|
|
696
|
|
|
697 static bool
|
|
|
698 instrument_gimple (gimple_stmt_iterator *gsi)
|
|
|
699 {
|
|
|
700 gimple *stmt;
|
|
|
701 tree rhs, lhs;
|
|
|
702 bool instrumented = false;
|
|
|
703
|
|
|
704 stmt = gsi_stmt (*gsi);
|
|
|
705 if (is_gimple_call (stmt)
|
|
|
706 && (gimple_call_fndecl (stmt)
|
|
|
707 != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
|
|
|
708 {
|
|
|
709 /* All functions with function call will have exit instrumented,
|
|
|
710 therefore no function calls other than __tsan_func_exit
|
|
|
711 shall appear in the functions. */
|
|
|
712 gimple_call_set_tail (as_a <gcall *> (stmt), false);
|
|
|
713 if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
|
|
|
714 instrument_builtin_call (gsi);
|
|
|
715 return true;
|
|
|
716 }
|
|
|
717 else if (is_gimple_assign (stmt)
|
|
|
718 && !gimple_clobber_p (stmt))
|
|
|
719 {
|
|
|
720 if (gimple_store_p (stmt))
|
|
|
721 {
|
|
|
722 lhs = gimple_assign_lhs (stmt);
|
|
|
723 instrumented = instrument_expr (*gsi, lhs, true);
|
|
|
724 }
|
|
|
725 if (gimple_assign_load_p (stmt))
|
|
|
726 {
|
|
|
727 rhs = gimple_assign_rhs1 (stmt);
|
|
|
728 instrumented = instrument_expr (*gsi, rhs, false);
|
|
|
729 }
|
|
|
730 }
|
|
|
731 return instrumented;
|
|
|
732 }
|
|
|
733
|
|
|
734 /* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
|
|
|
735
|
|
|
736 static void
|
|
|
737 replace_func_exit (gimple *stmt)
|
|
|
738 {
|
|
|
739 tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
|
|
|
740 gimple *g = gimple_build_call (builtin_decl, 0);
|
|
|
741 gimple_set_location (g, cfun->function_end_locus);
|
|
|
742 gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
|
|
|
743 gsi_replace (&gsi, g, true);
|
|
|
744 }
|
|
|
745
|
|
|
746 /* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
|
|
|
747
|
|
|
748 static void
|
|
|
749 instrument_func_exit (void)
|
|
|
750 {
|
|
|
751 location_t loc;
|
|
|
752 basic_block exit_bb;
|
|
|
753 gimple_stmt_iterator gsi;
|
|
|
754 gimple *stmt, *g;
|
|
|
755 tree builtin_decl;
|
|
|
756 edge e;
|
|
|
757 edge_iterator ei;
|
|
|
758
|
|
|
759 /* Find all function exits. */
|
|
|
760 exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
|
|
|
761 FOR_EACH_EDGE (e, ei, exit_bb->preds)
|
|
|
762 {
|
|
|
763 gsi = gsi_last_bb (e->src);
|
|
|
764 stmt = gsi_stmt (gsi);
|
|
|
765 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
|
|
|
766 || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
|
|
|
767 loc = gimple_location (stmt);
|
|
|
768 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
|
|
|
769 g = gimple_build_call (builtin_decl, 0);
|
|
|
770 gimple_set_location (g, loc);
|
|
|
771 gsi_insert_before (&gsi, g, GSI_SAME_STMT);
|
|
|
772 }
|
|
|
773 }
|
|
|
774
|
|
|
775 /* Instruments all interesting memory accesses in the current function.
|
|
|
776 Return true if func entry/exit should be instrumented. */
|
|
|
777
|
|
|
778 static bool
|
|
|
779 instrument_memory_accesses (bool *cfg_changed)
|
|
|
780 {
|
|
|
781 basic_block bb;
|
|
|
782 gimple_stmt_iterator gsi;
|
|
|
783 bool fentry_exit_instrument = false;
|
|
|
784 bool func_exit_seen = false;
|
|
|
785 auto_vec<gimple *> tsan_func_exits;
|
|
|
786
|
|
|
787 FOR_EACH_BB_FN (bb, cfun)
|
|
|
788 {
|
|
|
789 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
|
|
|
790 {
|
|
|
791 gimple *stmt = gsi_stmt (gsi);
|
|
|
792 if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
|
|
|
793 {
|
|
|
794 if (fentry_exit_instrument)
|
|
|
795 replace_func_exit (stmt);
|
|
|
796 else
|
|
|
797 tsan_func_exits.safe_push (stmt);
|
|
|
798 func_exit_seen = true;
|
|
|
799 }
|
|
|
800 else
|
|
|
801 fentry_exit_instrument |= instrument_gimple (&gsi);
|
|
|
802 }
|
|
|
803 if (gimple_purge_dead_eh_edges (bb))
|
|
|
804 *cfg_changed = true;
|
|
|
805 }
|
|
|
806 unsigned int i;
|
|
|
807 gimple *stmt;
|
|
|
808 FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
|
|
|
809 if (fentry_exit_instrument)
|
|
|
810 replace_func_exit (stmt);
|
|
|
811 else
|
|
|
812 {
|
|
|
813 gsi = gsi_for_stmt (stmt);
|
|
|
814 gsi_remove (&gsi, true);
|
|
|
815 }
|
|
|
816 if (fentry_exit_instrument && !func_exit_seen)
|
|
|
817 instrument_func_exit ();
|
|
|
818 return fentry_exit_instrument;
|
|
|
819 }
|
|
|
820
|
|
|
821 /* Instruments function entry. */
|
|
|
822
|
|
|
823 static void
|
|
|
824 instrument_func_entry (void)
|
|
|
825 {
|
|
|
826 tree ret_addr, builtin_decl;
|
|
|
827 gimple *g;
|
|
|
828 gimple_seq seq = NULL;
|
|
|
829
|
|
|
830 builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
|
|
|
831 g = gimple_build_call (builtin_decl, 1, integer_zero_node);
|
|
|
832 ret_addr = make_ssa_name (ptr_type_node);
|
|
|
833 gimple_call_set_lhs (g, ret_addr);
|
|
|
834 gimple_set_location (g, cfun->function_start_locus);
|
|
|
835 gimple_seq_add_stmt_without_update (&seq, g);
|
|
|
836
|
|
|
837 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
|
|
|
838 g = gimple_build_call (builtin_decl, 1, ret_addr);
|
|
|
839 gimple_set_location (g, cfun->function_start_locus);
|
|
|
840 gimple_seq_add_stmt_without_update (&seq, g);
|
|
|
841
|
|
|
842 edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
|
|
|
843 gsi_insert_seq_on_edge_immediate (e, seq);
|
|
|
844 }
|
|
|
845
|
|
|
846 /* ThreadSanitizer instrumentation pass. */
|
|
|
847
|
|
|
848 static unsigned
|
|
|
849 tsan_pass (void)
|
|
|
850 {
|
|
|
851 initialize_sanitizer_builtins ();
|
|
|
852 bool cfg_changed = false;
|
|
|
853 if (instrument_memory_accesses (&cfg_changed))
|
|
|
854 instrument_func_entry ();
|
|
|
855 return cfg_changed ? TODO_cleanup_cfg : 0;
|
|
|
856 }
|
|
|
857
|
|
|
858 /* Inserts __tsan_init () into the list of CTORs. */
|
|
|
859
|
|
|
860 void
|
|
|
861 tsan_finish_file (void)
|
|
|
862 {
|
|
|
863 tree ctor_statements = NULL_TREE;
|
|
|
864
|
|
|
865 initialize_sanitizer_builtins ();
|
|
|
866 tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
|
|
|
867 append_to_statement_list (build_call_expr (init_decl, 0),
|
|
|
868 &ctor_statements);
|
|
|
869 cgraph_build_static_cdtor ('I', ctor_statements,
|
|
|
870 MAX_RESERVED_INIT_PRIORITY - 1);
|
|
|
871 }
|
|
|
872
|
|
|
873 /* The pass descriptor. */
|
|
|
874
|
|
|
875 namespace {
|
|
|
876
|
|
|
877 const pass_data pass_data_tsan =
|
|
|
878 {
|
|
|
879 GIMPLE_PASS, /* type */
|
|
|
880 "tsan", /* name */
|
|
|
881 OPTGROUP_NONE, /* optinfo_flags */
|
|
|
882 TV_NONE, /* tv_id */
|
|
|
883 ( PROP_ssa | PROP_cfg ), /* properties_required */
|
|
|
884 0, /* properties_provided */
|
|
|
885 0, /* properties_destroyed */
|
|
|
886 0, /* todo_flags_start */
|
|
|
887 TODO_update_ssa, /* todo_flags_finish */
|
|
|
888 };
|
|
|
889
|
|
|
890 class pass_tsan : public gimple_opt_pass
|
|
|
891 {
|
|
|
892 public:
|
|
|
893 pass_tsan (gcc::context *ctxt)
|
|
|
894 : gimple_opt_pass (pass_data_tsan, ctxt)
|
|
|
895 {}
|
|
|
896
|
|
|
897 /* opt_pass methods: */
|
|
|
898 opt_pass * clone () { return new pass_tsan (m_ctxt); }
|
|
|
899 virtual bool gate (function *)
|
|
|
900 {
|
|
|
901 return sanitize_flags_p (SANITIZE_THREAD);
|
|
|
902 }
|
|
|
903
|
|
|
904 virtual unsigned int execute (function *) { return tsan_pass (); }
|
|
|
905
|
|
|
906 }; // class pass_tsan
|
|
|
907
|
|
|
908 } // anon namespace
|
|
|
909
|
|
|
910 gimple_opt_pass *
|
|
|
911 make_pass_tsan (gcc::context *ctxt)
|
|
|
912 {
|
|
|
913 return new pass_tsan (ctxt);
|
|
|
914 }
|
|
|
915
|
|
|
916 namespace {
|
|
|
917
|
|
|
918 const pass_data pass_data_tsan_O0 =
|
|
|
919 {
|
|
|
920 GIMPLE_PASS, /* type */
|
|
|
921 "tsan0", /* name */
|
|
|
922 OPTGROUP_NONE, /* optinfo_flags */
|
|
|
923 TV_NONE, /* tv_id */
|
|
|
924 ( PROP_ssa | PROP_cfg ), /* properties_required */
|
|
|
925 0, /* properties_provided */
|
|
|
926 0, /* properties_destroyed */
|
|
|
927 0, /* todo_flags_start */
|
|
|
928 TODO_update_ssa, /* todo_flags_finish */
|
|
|
929 };
|
|
|
930
|
|
|
931 class pass_tsan_O0 : public gimple_opt_pass
|
|
|
932 {
|
|
|
933 public:
|
|
|
934 pass_tsan_O0 (gcc::context *ctxt)
|
|
|
935 : gimple_opt_pass (pass_data_tsan_O0, ctxt)
|
|
|
936 {}
|
|
|
937
|
|
|
938 /* opt_pass methods: */
|
|
|
939 virtual bool gate (function *)
|
|
|
940 {
|
|
|
941 return (sanitize_flags_p (SANITIZE_THREAD) && !optimize);
|
|
|
942 }
|
|
|
943
|
|
|
944 virtual unsigned int execute (function *) { return tsan_pass (); }
|
|
|
945
|
|
|
946 }; // class pass_tsan_O0
|
|
|
947
|
|
|
948 } // anon namespace
|
|
|
949
|
|
|
950 gimple_opt_pass *
|
|
|
951 make_pass_tsan_O0 (gcc::context *ctxt)
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952 {
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953 return new pass_tsan_O0 (ctxt);
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954 }
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