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111
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1 /* GCC instrumentation plugin for ThreadSanitizer.
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145
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2 Copyright (C) 2011-2020 Free Software Foundation, Inc.
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111
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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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131
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113 poly_int64 unused_bitsize, unused_bitpos;
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111
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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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131
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117 base = get_inner_reference (expr, &unused_bitsize, &unused_bitpos, &offset,
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118 &mode, &unsignedp, &reversep, &volatilep);
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111
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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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131
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145 HOST_WIDE_INT bitpos, bitsize;
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111
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146 base = TREE_OPERAND (expr, 0);
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147 if (TREE_CODE (expr) == COMPONENT_REF)
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148 {
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149 expr = TREE_OPERAND (expr, 1);
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150 if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
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151 expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
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152 if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
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153 || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
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154 || !tree_fits_uhwi_p (DECL_SIZE (expr)))
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155 return false;
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156 bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
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157 + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
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158 bitsize = tree_to_uhwi (DECL_SIZE (expr));
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159 }
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160 else
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161 {
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162 if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
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163 || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
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164 return false;
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165 bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
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166 bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
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167 }
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168 if (bitpos < 0 || bitsize <= 0)
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169 return false;
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170 size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
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171 / BITS_PER_UNIT;
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172 if (may_be_nonaddressable_p (base))
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173 return false;
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174 align = get_object_alignment (base);
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175 if (align < BITS_PER_UNIT)
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176 return false;
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177 bitpos = bitpos & ~(BITS_PER_UNIT - 1);
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178 if ((align - 1) & bitpos)
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179 {
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180 align = (align - 1) & bitpos;
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181 align = least_bit_hwi (align);
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182 }
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183 expr = build_fold_addr_expr (unshare_expr (base));
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184 expr = build2 (MEM_REF, char_type_node, expr,
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185 build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
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186 expr_ptr = build_fold_addr_expr (expr);
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187 }
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188 else
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189 {
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190 if (may_be_nonaddressable_p (expr))
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191 return false;
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192 align = get_object_alignment (expr);
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193 if (align < BITS_PER_UNIT)
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194 return false;
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195 expr_ptr = build_fold_addr_expr (unshare_expr (expr));
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196 }
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197 expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
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198 if ((size & (size - 1)) != 0 || size > 16
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199 || align < MIN (size, 8) * BITS_PER_UNIT)
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200 {
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201 builtin_decl = builtin_decl_implicit (is_write
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202 ? BUILT_IN_TSAN_WRITE_RANGE
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203 : BUILT_IN_TSAN_READ_RANGE);
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204 g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
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205 }
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206 else if (rhs == NULL)
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207 g = gimple_build_call (get_memory_access_decl (is_write, size),
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208 1, expr_ptr);
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209 else
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210 {
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211 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
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212 g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
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213 }
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214 gimple_set_location (g, loc);
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215 gimple_seq_add_stmt_without_update (&seq, g);
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216 /* Instrumentation for assignment of a function result
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217 must be inserted after the call. Instrumentation for
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218 reads of function arguments must be inserted before the call.
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219 That's because the call can contain synchronization. */
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220 if (is_gimple_call (stmt) && is_write)
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221 {
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222 /* If the call can throw, it must be the last stmt in
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223 a basic block, so the instrumented stmts need to be
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224 inserted in successor bbs. */
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225 if (is_ctrl_altering_stmt (stmt))
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226 {
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227 edge e;
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228
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229 bb = gsi_bb (gsi);
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230 e = find_fallthru_edge (bb->succs);
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231 if (e)
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232 gsi_insert_seq_on_edge_immediate (e, seq);
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233 }
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234 else
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235 gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
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236 }
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237 else
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238 gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
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239
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240 return true;
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241 }
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242
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243 /* Actions for sync/atomic builtin transformations. */
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244 enum tsan_atomic_action
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245 {
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246 check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
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247 bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst,
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248 bool_clear, bool_test_and_set
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249 };
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250
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251 /* Table how to map sync/atomic builtins to their corresponding
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252 tsan equivalents. */
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253 static const struct tsan_map_atomic
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254 {
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255 enum built_in_function fcode, tsan_fcode;
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256 enum tsan_atomic_action action;
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257 enum tree_code code;
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258 } tsan_atomic_table[] =
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259 {
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260 #define TRANSFORM(fcode, tsan_fcode, action, code) \
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261 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
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262 #define CHECK_LAST(fcode, tsan_fcode) \
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263 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
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264 #define ADD_SEQ_CST(fcode, tsan_fcode) \
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265 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
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266 #define ADD_ACQUIRE(fcode, tsan_fcode) \
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267 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
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268 #define WEAK_CAS(fcode, tsan_fcode) \
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269 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
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270 #define STRONG_CAS(fcode, tsan_fcode) \
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271 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
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272 #define BOOL_CAS(fcode, tsan_fcode) \
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273 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
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274 #define VAL_CAS(fcode, tsan_fcode) \
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275 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
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276 #define LOCK_RELEASE(fcode, tsan_fcode) \
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277 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
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278 #define FETCH_OP(fcode, tsan_fcode, code) \
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279 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
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280 #define FETCH_OPS(fcode, tsan_fcode, code) \
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281 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
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282 #define BOOL_CLEAR(fcode, tsan_fcode) \
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283 TRANSFORM (fcode, tsan_fcode, bool_clear, ERROR_MARK)
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284 #define BOOL_TEST_AND_SET(fcode, tsan_fcode) \
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285 TRANSFORM (fcode, tsan_fcode, bool_test_and_set, ERROR_MARK)
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286
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287 CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
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288 CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
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289 CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
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290 CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
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291 CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
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292 CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
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293 CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
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294 CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
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295 CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
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296 CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
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297 CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
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298 CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
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299 CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
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300 CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
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301 CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
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302 CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
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303 CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
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304 CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
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305 CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
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306 CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
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307 CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
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308 CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
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309 CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
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310 CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
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311 CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
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312 CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
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313 CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
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314 CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
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315 CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
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316 CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
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317 CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
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318 CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
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319 CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
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320 CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
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321 CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
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322 CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
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323 CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
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324 CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
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325 CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
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326 CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
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327 CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
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328 CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
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329 CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
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330 CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
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331 CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
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332
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333 CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
|
|
|
334 CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
|
|
|
335
|
|
|
336 FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
|
|
|
337 FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
|
|
|
338 FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
|
|
|
339 FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
|
|
|
340 FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
|
|
|
341 FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
|
|
|
342 FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
|
|
|
343 FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
|
|
|
344 FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
|
|
|
345 FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
|
|
|
346 FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
|
|
|
347 FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
|
|
|
348 FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
|
|
|
349 FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
|
|
|
350 FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
|
|
|
351 FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
|
|
|
352 FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
|
|
|
353 FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
|
|
|
354 FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
|
|
|
355 FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
|
|
|
356 FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
357 FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
358 FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
359 FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
360 FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
361 FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
362 FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
363 FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
364 FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
365 FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
366
|
|
|
367 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
|
|
|
368 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
|
|
|
369 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
|
|
|
370 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
|
|
|
371 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
|
|
|
372
|
|
|
373 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
|
|
|
374 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
|
|
|
375 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
|
|
|
376 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
|
|
|
377 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
|
|
|
378 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
|
|
|
379 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
|
|
|
380 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
|
|
|
381 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
|
|
|
382 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
|
|
|
383 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
|
|
|
384 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
|
|
|
385 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
|
|
|
386 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
|
|
|
387 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
|
|
|
388 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
|
|
|
389 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
|
|
|
390 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
|
|
|
391 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
|
|
|
392 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
|
|
|
393 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
|
|
|
394 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
|
|
|
395 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
|
|
|
396 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
|
|
|
397 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
|
|
|
398 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
|
|
|
399 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
|
|
|
400 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
|
|
|
401 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
|
|
|
402 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
|
|
|
403
|
|
|
404 ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
|
|
|
405
|
|
|
406 FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
|
|
|
407 FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
|
|
|
408 FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
|
|
|
409 FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
|
|
|
410 FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
|
|
|
411 FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
|
|
|
412 FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
|
|
|
413 FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
|
|
|
414 FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
|
|
|
415 FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
|
|
|
416 FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
|
|
|
417 FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
|
|
|
418 FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
|
|
|
419 FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
|
|
|
420 FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
|
|
|
421 FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
|
|
|
422 FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
|
|
|
423 FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
|
|
|
424 FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
|
|
|
425 FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
|
|
|
426 FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
427 FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
428 FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
429 FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
430 FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
|
|
|
431 FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
432 FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
433 FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
434 FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
435 FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
|
|
|
436
|
|
|
437 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
|
|
|
438 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
|
|
|
439 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
|
|
|
440 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
|
|
|
441 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
|
|
|
442
|
|
|
443 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
|
|
|
444 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
|
|
|
445 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
|
|
|
446 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
|
|
|
447 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
|
|
|
448 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
|
|
|
449 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
|
|
|
450 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
|
|
|
451 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
|
|
|
452
|
|
|
453 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
|
|
|
454 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
|
|
|
455 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
|
|
|
456 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
|
|
|
457 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
|
|
|
458 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
|
|
|
459 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
|
|
|
460 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
|
|
|
461 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
|
|
|
462 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
|
|
|
463
|
|
|
464 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
|
|
|
465 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
|
|
|
466 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
|
|
|
467 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
|
|
|
468 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
|
|
|
469 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
|
|
|
470
|
|
|
471 LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
|
|
|
472 LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
|
|
|
473 LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
|
|
|
474 LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
|
|
|
475 LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE),
|
|
|
476
|
|
|
477 BOOL_CLEAR (ATOMIC_CLEAR, TSAN_ATOMIC8_STORE),
|
|
|
478
|
|
|
479 BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET, TSAN_ATOMIC8_EXCHANGE)
|
|
|
480 };
|
|
|
481
|
|
|
482 /* Instrument an atomic builtin. */
|
|
|
483
|
|
|
484 static void
|
|
|
485 instrument_builtin_call (gimple_stmt_iterator *gsi)
|
|
|
486 {
|
|
|
487 gimple *stmt = gsi_stmt (*gsi), *g;
|
|
|
488 tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
|
|
|
489 enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
|
|
|
490 unsigned int i, num = gimple_call_num_args (stmt), j;
|
|
|
491 for (j = 0; j < 6 && j < num; j++)
|
|
|
492 args[j] = gimple_call_arg (stmt, j);
|
|
|
493 for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
|
|
|
494 if (fcode != tsan_atomic_table[i].fcode)
|
|
|
495 continue;
|
|
|
496 else
|
|
|
497 {
|
|
|
498 tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
|
|
|
499 if (decl == NULL_TREE)
|
|
|
500 return;
|
|
|
501 switch (tsan_atomic_table[i].action)
|
|
|
502 {
|
|
|
503 case check_last:
|
|
|
504 case fetch_op:
|
|
|
505 last_arg = gimple_call_arg (stmt, num - 1);
|
|
|
506 if (tree_fits_uhwi_p (last_arg)
|
|
|
507 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
|
|
|
508 return;
|
|
|
509 gimple_call_set_fndecl (stmt, decl);
|
|
|
510 update_stmt (stmt);
|
|
|
511 maybe_clean_eh_stmt (stmt);
|
|
|
512 if (tsan_atomic_table[i].action == fetch_op)
|
|
|
513 {
|
|
|
514 args[1] = gimple_call_arg (stmt, 1);
|
|
|
515 goto adjust_result;
|
|
|
516 }
|
|
|
517 return;
|
|
|
518 case add_seq_cst:
|
|
|
519 case add_acquire:
|
|
|
520 case fetch_op_seq_cst:
|
|
|
521 gcc_assert (num <= 2);
|
|
|
522 for (j = 0; j < num; j++)
|
|
|
523 args[j] = gimple_call_arg (stmt, j);
|
|
|
524 for (; j < 2; j++)
|
|
|
525 args[j] = NULL_TREE;
|
|
|
526 args[num] = build_int_cst (NULL_TREE,
|
|
|
527 tsan_atomic_table[i].action
|
|
|
528 != add_acquire
|
|
|
529 ? MEMMODEL_SEQ_CST
|
|
|
530 : MEMMODEL_ACQUIRE);
|
|
|
531 update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
|
|
|
532 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
533 stmt = gsi_stmt (*gsi);
|
|
|
534 if (tsan_atomic_table[i].action == fetch_op_seq_cst)
|
|
|
535 {
|
|
|
536 adjust_result:
|
|
|
537 lhs = gimple_call_lhs (stmt);
|
|
|
538 if (lhs == NULL_TREE)
|
|
|
539 return;
|
|
|
540 if (!useless_type_conversion_p (TREE_TYPE (lhs),
|
|
|
541 TREE_TYPE (args[1])))
|
|
|
542 {
|
|
|
543 tree var = make_ssa_name (TREE_TYPE (lhs));
|
|
|
544 g = gimple_build_assign (var, NOP_EXPR, args[1]);
|
|
|
545 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
546 args[1] = var;
|
|
|
547 }
|
|
|
548 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
|
|
|
549 /* BIT_NOT_EXPR stands for NAND. */
|
|
|
550 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
|
|
|
551 {
|
|
|
552 tree var = make_ssa_name (TREE_TYPE (lhs));
|
|
|
553 g = gimple_build_assign (var, BIT_AND_EXPR,
|
|
|
554 gimple_call_lhs (stmt), args[1]);
|
|
|
555 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
556 g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
|
|
|
557 }
|
|
|
558 else
|
|
|
559 g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
|
|
|
560 gimple_call_lhs (stmt), args[1]);
|
|
|
561 update_stmt (stmt);
|
|
|
562 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
563 }
|
|
|
564 return;
|
|
|
565 case weak_cas:
|
|
|
566 if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
|
|
|
567 continue;
|
|
|
568 /* FALLTHRU */
|
|
|
569 case strong_cas:
|
|
|
570 gcc_assert (num == 6);
|
|
|
571 for (j = 0; j < 6; j++)
|
|
|
572 args[j] = gimple_call_arg (stmt, j);
|
|
|
573 if (tree_fits_uhwi_p (args[4])
|
|
|
574 && memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST)
|
|
|
575 return;
|
|
|
576 if (tree_fits_uhwi_p (args[5])
|
|
|
577 && memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST)
|
|
|
578 return;
|
|
|
579 update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
|
|
|
580 args[4], args[5]);
|
|
|
581 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
582 return;
|
|
|
583 case bool_cas:
|
|
|
584 case val_cas:
|
|
|
585 gcc_assert (num == 3);
|
|
|
586 for (j = 0; j < 3; j++)
|
|
|
587 args[j] = gimple_call_arg (stmt, j);
|
|
|
588 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
|
|
|
589 t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
|
|
|
590 t = create_tmp_var (t);
|
|
|
591 mark_addressable (t);
|
|
|
592 if (!useless_type_conversion_p (TREE_TYPE (t),
|
|
|
593 TREE_TYPE (args[1])))
|
|
|
594 {
|
|
|
595 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
|
|
|
596 NOP_EXPR, args[1]);
|
|
|
597 gsi_insert_before (gsi, g, GSI_SAME_STMT);
|
|
|
598 args[1] = gimple_assign_lhs (g);
|
|
|
599 }
|
|
|
600 g = gimple_build_assign (t, args[1]);
|
|
|
601 gsi_insert_before (gsi, g, GSI_SAME_STMT);
|
|
|
602 lhs = gimple_call_lhs (stmt);
|
|
|
603 update_gimple_call (gsi, decl, 5, args[0],
|
|
|
604 build_fold_addr_expr (t), args[2],
|
|
|
605 build_int_cst (NULL_TREE,
|
|
|
606 MEMMODEL_SEQ_CST),
|
|
|
607 build_int_cst (NULL_TREE,
|
|
|
608 MEMMODEL_SEQ_CST));
|
|
|
609 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
610 if (tsan_atomic_table[i].action == val_cas && lhs)
|
|
|
611 {
|
|
|
612 tree cond;
|
|
|
613 stmt = gsi_stmt (*gsi);
|
|
|
614 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
|
|
|
615 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
616 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
|
|
|
617 cond = build2 (NE_EXPR, boolean_type_node, t,
|
|
|
618 build_int_cst (TREE_TYPE (t), 0));
|
|
|
619 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
|
|
|
620 gimple_assign_lhs (g));
|
|
|
621 gimple_call_set_lhs (stmt, t);
|
|
|
622 update_stmt (stmt);
|
|
|
623 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
624 }
|
|
|
625 return;
|
|
|
626 case lock_release:
|
|
|
627 gcc_assert (num == 1);
|
|
|
628 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
|
|
|
629 t = TREE_VALUE (TREE_CHAIN (t));
|
|
|
630 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
|
|
|
631 build_int_cst (t, 0),
|
|
|
632 build_int_cst (NULL_TREE,
|
|
|
633 MEMMODEL_RELEASE));
|
|
|
634 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
635 return;
|
|
|
636 case bool_clear:
|
|
|
637 case bool_test_and_set:
|
|
|
638 if (BOOL_TYPE_SIZE != 8)
|
|
|
639 {
|
|
|
640 decl = NULL_TREE;
|
|
|
641 for (j = 1; j < 5; j++)
|
|
|
642 if (BOOL_TYPE_SIZE == (8 << j))
|
|
|
643 {
|
|
|
644 enum built_in_function tsan_fcode
|
|
|
645 = (enum built_in_function)
|
|
|
646 (tsan_atomic_table[i].tsan_fcode + j);
|
|
|
647 decl = builtin_decl_implicit (tsan_fcode);
|
|
|
648 break;
|
|
|
649 }
|
|
|
650 if (decl == NULL_TREE)
|
|
|
651 return;
|
|
|
652 }
|
|
|
653 last_arg = gimple_call_arg (stmt, num - 1);
|
|
|
654 if (tree_fits_uhwi_p (last_arg)
|
|
|
655 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
|
|
|
656 return;
|
|
|
657 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
|
|
|
658 t = TREE_VALUE (TREE_CHAIN (t));
|
|
|
659 if (tsan_atomic_table[i].action == bool_clear)
|
|
|
660 {
|
|
|
661 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
|
|
|
662 build_int_cst (t, 0), last_arg);
|
|
|
663 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
664 return;
|
|
|
665 }
|
|
|
666 t = build_int_cst (t, targetm.atomic_test_and_set_trueval);
|
|
|
667 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
|
|
|
668 t, last_arg);
|
|
|
669 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
|
|
|
670 stmt = gsi_stmt (*gsi);
|
|
|
671 lhs = gimple_call_lhs (stmt);
|
|
|
672 if (lhs == NULL_TREE)
|
|
|
673 return;
|
|
|
674 if (targetm.atomic_test_and_set_trueval != 1
|
|
|
675 || !useless_type_conversion_p (TREE_TYPE (lhs),
|
|
|
676 TREE_TYPE (t)))
|
|
|
677 {
|
|
|
678 tree new_lhs = make_ssa_name (TREE_TYPE (t));
|
|
|
679 gimple_call_set_lhs (stmt, new_lhs);
|
|
|
680 if (targetm.atomic_test_and_set_trueval != 1)
|
|
|
681 g = gimple_build_assign (lhs, NE_EXPR, new_lhs,
|
|
|
682 build_int_cst (TREE_TYPE (t), 0));
|
|
|
683 else
|
|
|
684 g = gimple_build_assign (lhs, NOP_EXPR, new_lhs);
|
|
|
685 gsi_insert_after (gsi, g, GSI_NEW_STMT);
|
|
|
686 update_stmt (stmt);
|
|
|
687 }
|
|
|
688 return;
|
|
|
689 default:
|
|
|
690 continue;
|
|
|
691 }
|
|
|
692 }
|
|
|
693 }
|
|
|
694
|
|
|
695 /* Instruments the gimple pointed to by GSI. Return
|
|
|
696 true if func entry/exit should be instrumented. */
|
|
|
697
|
|
|
698 static bool
|
|
|
699 instrument_gimple (gimple_stmt_iterator *gsi)
|
|
|
700 {
|
|
|
701 gimple *stmt;
|
|
|
702 tree rhs, lhs;
|
|
|
703 bool instrumented = false;
|
|
|
704
|
|
|
705 stmt = gsi_stmt (*gsi);
|
|
|
706 if (is_gimple_call (stmt)
|
|
|
707 && (gimple_call_fndecl (stmt)
|
|
|
708 != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
|
|
|
709 {
|
|
|
710 /* All functions with function call will have exit instrumented,
|
|
|
711 therefore no function calls other than __tsan_func_exit
|
|
|
712 shall appear in the functions. */
|
|
|
713 gimple_call_set_tail (as_a <gcall *> (stmt), false);
|
|
|
714 if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
|
|
|
715 instrument_builtin_call (gsi);
|
|
|
716 return true;
|
|
|
717 }
|
|
|
718 else if (is_gimple_assign (stmt)
|
|
|
719 && !gimple_clobber_p (stmt))
|
|
|
720 {
|
|
|
721 if (gimple_store_p (stmt))
|
|
|
722 {
|
|
|
723 lhs = gimple_assign_lhs (stmt);
|
|
|
724 instrumented = instrument_expr (*gsi, lhs, true);
|
|
|
725 }
|
|
|
726 if (gimple_assign_load_p (stmt))
|
|
|
727 {
|
|
|
728 rhs = gimple_assign_rhs1 (stmt);
|
|
|
729 instrumented = instrument_expr (*gsi, rhs, false);
|
|
|
730 }
|
|
|
731 }
|
|
|
732 return instrumented;
|
|
|
733 }
|
|
|
734
|
|
|
735 /* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
|
|
|
736
|
|
|
737 static void
|
|
|
738 replace_func_exit (gimple *stmt)
|
|
|
739 {
|
|
|
740 tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
|
|
|
741 gimple *g = gimple_build_call (builtin_decl, 0);
|
|
|
742 gimple_set_location (g, cfun->function_end_locus);
|
|
|
743 gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
|
|
|
744 gsi_replace (&gsi, g, true);
|
|
|
745 }
|
|
|
746
|
|
|
747 /* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
|
|
|
748
|
|
|
749 static void
|
|
|
750 instrument_func_exit (void)
|
|
|
751 {
|
|
|
752 location_t loc;
|
|
|
753 basic_block exit_bb;
|
|
|
754 gimple_stmt_iterator gsi;
|
|
|
755 gimple *stmt, *g;
|
|
|
756 tree builtin_decl;
|
|
|
757 edge e;
|
|
|
758 edge_iterator ei;
|
|
|
759
|
|
|
760 /* Find all function exits. */
|
|
|
761 exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
|
|
|
762 FOR_EACH_EDGE (e, ei, exit_bb->preds)
|
|
|
763 {
|
|
|
764 gsi = gsi_last_bb (e->src);
|
|
|
765 stmt = gsi_stmt (gsi);
|
|
|
766 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
|
|
|
767 || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
|
|
|
768 loc = gimple_location (stmt);
|
|
|
769 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
|
|
|
770 g = gimple_build_call (builtin_decl, 0);
|
|
|
771 gimple_set_location (g, loc);
|
|
|
772 gsi_insert_before (&gsi, g, GSI_SAME_STMT);
|
|
|
773 }
|
|
|
774 }
|
|
|
775
|
|
|
776 /* Instruments all interesting memory accesses in the current function.
|
|
|
777 Return true if func entry/exit should be instrumented. */
|
|
|
778
|
|
|
779 static bool
|
|
|
780 instrument_memory_accesses (bool *cfg_changed)
|
|
|
781 {
|
|
|
782 basic_block bb;
|
|
|
783 gimple_stmt_iterator gsi;
|
|
|
784 bool fentry_exit_instrument = false;
|
|
|
785 bool func_exit_seen = false;
|
|
|
786 auto_vec<gimple *> tsan_func_exits;
|
|
|
787
|
|
|
788 FOR_EACH_BB_FN (bb, cfun)
|
|
|
789 {
|
|
|
790 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
|
|
|
791 {
|
|
|
792 gimple *stmt = gsi_stmt (gsi);
|
|
|
793 if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
|
|
|
794 {
|
|
|
795 if (fentry_exit_instrument)
|
|
|
796 replace_func_exit (stmt);
|
|
|
797 else
|
|
|
798 tsan_func_exits.safe_push (stmt);
|
|
|
799 func_exit_seen = true;
|
|
|
800 }
|
|
|
801 else
|
|
|
802 fentry_exit_instrument |= instrument_gimple (&gsi);
|
|
|
803 }
|
|
|
804 if (gimple_purge_dead_eh_edges (bb))
|
|
|
805 *cfg_changed = true;
|
|
|
806 }
|
|
|
807 unsigned int i;
|
|
|
808 gimple *stmt;
|
|
|
809 FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
|
|
|
810 if (fentry_exit_instrument)
|
|
|
811 replace_func_exit (stmt);
|
|
|
812 else
|
|
|
813 {
|
|
|
814 gsi = gsi_for_stmt (stmt);
|
|
|
815 gsi_remove (&gsi, true);
|
|
|
816 }
|
|
|
817 if (fentry_exit_instrument && !func_exit_seen)
|
|
|
818 instrument_func_exit ();
|
|
|
819 return fentry_exit_instrument;
|
|
|
820 }
|
|
|
821
|
|
|
822 /* Instruments function entry. */
|
|
|
823
|
|
|
824 static void
|
|
|
825 instrument_func_entry (void)
|
|
|
826 {
|
|
|
827 tree ret_addr, builtin_decl;
|
|
|
828 gimple *g;
|
|
|
829 gimple_seq seq = NULL;
|
|
|
830
|
|
|
831 builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
|
|
|
832 g = gimple_build_call (builtin_decl, 1, integer_zero_node);
|
|
|
833 ret_addr = make_ssa_name (ptr_type_node);
|
|
|
834 gimple_call_set_lhs (g, ret_addr);
|
|
|
835 gimple_set_location (g, cfun->function_start_locus);
|
|
|
836 gimple_seq_add_stmt_without_update (&seq, g);
|
|
|
837
|
|
|
838 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
|
|
|
839 g = gimple_build_call (builtin_decl, 1, ret_addr);
|
|
|
840 gimple_set_location (g, cfun->function_start_locus);
|
|
|
841 gimple_seq_add_stmt_without_update (&seq, g);
|
|
|
842
|
|
|
843 edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
|
|
|
844 gsi_insert_seq_on_edge_immediate (e, seq);
|
|
|
845 }
|
|
|
846
|
|
|
847 /* ThreadSanitizer instrumentation pass. */
|
|
|
848
|
|
|
849 static unsigned
|
|
|
850 tsan_pass (void)
|
|
|
851 {
|
|
|
852 initialize_sanitizer_builtins ();
|
|
|
853 bool cfg_changed = false;
|
|
|
854 if (instrument_memory_accesses (&cfg_changed))
|
|
|
855 instrument_func_entry ();
|
|
|
856 return cfg_changed ? TODO_cleanup_cfg : 0;
|
|
|
857 }
|
|
|
858
|
|
|
859 /* Inserts __tsan_init () into the list of CTORs. */
|
|
|
860
|
|
|
861 void
|
|
|
862 tsan_finish_file (void)
|
|
|
863 {
|
|
|
864 tree ctor_statements = NULL_TREE;
|
|
|
865
|
|
|
866 initialize_sanitizer_builtins ();
|
|
|
867 tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
|
|
|
868 append_to_statement_list (build_call_expr (init_decl, 0),
|
|
|
869 &ctor_statements);
|
|
|
870 cgraph_build_static_cdtor ('I', ctor_statements,
|
|
|
871 MAX_RESERVED_INIT_PRIORITY - 1);
|
|
|
872 }
|
|
|
873
|
|
|
874 /* The pass descriptor. */
|
|
|
875
|
|
|
876 namespace {
|
|
|
877
|
|
|
878 const pass_data pass_data_tsan =
|
|
|
879 {
|
|
|
880 GIMPLE_PASS, /* type */
|
|
|
881 "tsan", /* name */
|
|
|
882 OPTGROUP_NONE, /* optinfo_flags */
|
|
|
883 TV_NONE, /* tv_id */
|
|
|
884 ( PROP_ssa | PROP_cfg ), /* properties_required */
|
|
|
885 0, /* properties_provided */
|
|
|
886 0, /* properties_destroyed */
|
|
|
887 0, /* todo_flags_start */
|
|
|
888 TODO_update_ssa, /* todo_flags_finish */
|
|
|
889 };
|
|
|
890
|
|
|
891 class pass_tsan : public gimple_opt_pass
|
|
|
892 {
|
|
|
893 public:
|
|
|
894 pass_tsan (gcc::context *ctxt)
|
|
|
895 : gimple_opt_pass (pass_data_tsan, ctxt)
|
|
|
896 {}
|
|
|
897
|
|
|
898 /* opt_pass methods: */
|
|
|
899 opt_pass * clone () { return new pass_tsan (m_ctxt); }
|
|
|
900 virtual bool gate (function *)
|
|
|
901 {
|
|
|
902 return sanitize_flags_p (SANITIZE_THREAD);
|
|
|
903 }
|
|
|
904
|
|
|
905 virtual unsigned int execute (function *) { return tsan_pass (); }
|
|
|
906
|
|
|
907 }; // class pass_tsan
|
|
|
908
|
|
|
909 } // anon namespace
|
|
|
910
|
|
|
911 gimple_opt_pass *
|
|
|
912 make_pass_tsan (gcc::context *ctxt)
|
|
|
913 {
|
|
|
914 return new pass_tsan (ctxt);
|
|
|
915 }
|
|
|
916
|
|
|
917 namespace {
|
|
|
918
|
|
|
919 const pass_data pass_data_tsan_O0 =
|
|
|
920 {
|
|
|
921 GIMPLE_PASS, /* type */
|
|
|
922 "tsan0", /* name */
|
|
|
923 OPTGROUP_NONE, /* optinfo_flags */
|
|
|
924 TV_NONE, /* tv_id */
|
|
|
925 ( PROP_ssa | PROP_cfg ), /* properties_required */
|
|
|
926 0, /* properties_provided */
|
|
|
927 0, /* properties_destroyed */
|
|
|
928 0, /* todo_flags_start */
|
|
|
929 TODO_update_ssa, /* todo_flags_finish */
|
|
|
930 };
|
|
|
931
|
|
|
932 class pass_tsan_O0 : public gimple_opt_pass
|
|
|
933 {
|
|
|
934 public:
|
|
|
935 pass_tsan_O0 (gcc::context *ctxt)
|
|
|
936 : gimple_opt_pass (pass_data_tsan_O0, ctxt)
|
|
|
937 {}
|
|
|
938
|
|
|
939 /* opt_pass methods: */
|
|
|
940 virtual bool gate (function *)
|
|
|
941 {
|
|
|
942 return (sanitize_flags_p (SANITIZE_THREAD) && !optimize);
|
|
|
943 }
|
|
|
944
|
|
|
945 virtual unsigned int execute (function *) { return tsan_pass (); }
|
|
|
946
|
|
|
947 }; // class pass_tsan_O0
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948
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949 } // anon namespace
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950
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951 gimple_opt_pass *
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952 make_pass_tsan_O0 (gcc::context *ctxt)
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953 {
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954 return new pass_tsan_O0 (ctxt);
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955 }
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