111
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1 /* The library used by gdb.
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145
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2 Copyright (C) 2014-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include <cc1plugin-config.h>
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21 #include <vector>
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22 #include <string>
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23 #include <sys/socket.h>
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24 #include <sys/types.h>
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25 #include <unistd.h>
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26 #include <sys/wait.h>
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27 #include <stdio.h>
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28 #include <errno.h>
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29 #include <sys/stat.h>
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30 #include <stdlib.h>
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31 #include <sstream>
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32 #include "marshall-cp.hh"
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33 #include "rpc.hh"
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34 #include "connection.hh"
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35 #include "names.hh"
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36 #include "callbacks.hh"
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37 #include "libiberty.h"
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38 #include "xregex.h"
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39 #include "findcomp.hh"
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131
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40 #include "compiler-name.hh"
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111
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41 #include "intl.h"
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42
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43 struct libcp1;
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44
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45 class libcp1_connection;
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46
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47 // The C compiler context that we hand back to our caller.
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48 struct libcp1 : public gcc_cp_context
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49 {
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50 libcp1 (const gcc_base_vtable *, const gcc_cp_fe_vtable *);
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51 ~libcp1 ();
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52
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53 // A convenience function to print something.
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54 void print (const char *str)
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55 {
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56 this->print_function (this->print_datum, str);
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57 }
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58
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59 libcp1_connection *connection;
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60
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61 gcc_cp_oracle_function *binding_oracle;
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62 gcc_cp_symbol_address_function *address_oracle;
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63 gcc_cp_enter_leave_user_expr_scope_function *enter_scope;
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64 gcc_cp_enter_leave_user_expr_scope_function *leave_scope;
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65 void *oracle_datum;
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66
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67 void (*print_function) (void *datum, const char *message);
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68 void *print_datum;
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69
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70 std::vector<std::string> args;
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71 std::string source_file;
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72
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73 /* Non-zero as an equivalent to gcc driver option "-v". */
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74 bool verbose;
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75
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76 /* Compiler to set by set_triplet_regexp or set_driver_filename. */
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77 class compiler
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78 {
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79 protected:
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80 libcp1 *self_;
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81 public:
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82 compiler (libcp1 *self) : self_ (self)
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83 {
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84 }
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85 virtual char *find (std::string &compiler) const;
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86 virtual ~compiler ()
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87 {
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88 }
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89 } *compilerp;
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90
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91 /* Compiler to set by set_triplet_regexp. */
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92 class compiler_triplet_regexp : public compiler
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93 {
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94 private:
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95 std::string triplet_regexp_;
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96 public:
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97 virtual char *find (std::string &compiler) const;
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98 compiler_triplet_regexp (libcp1 *self, std::string triplet_regexp)
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99 : compiler (self), triplet_regexp_ (triplet_regexp)
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100 {
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101 }
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102 virtual ~compiler_triplet_regexp ()
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103 {
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104 }
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105 };
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106
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107 /* Compiler to set by set_driver_filename. */
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108 class compiler_driver_filename : public compiler
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109 {
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110 private:
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111 std::string driver_filename_;
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112 public:
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113 virtual char *find (std::string &compiler) const;
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114 compiler_driver_filename (libcp1 *self, std::string driver_filename)
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115 : compiler (self), driver_filename_ (driver_filename)
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116 {
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117 }
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118 virtual ~compiler_driver_filename ()
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119 {
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120 }
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121 };
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122 };
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123
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124 // A local subclass of connection that holds a back-pointer to the
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125 // gcc_c_context object that we provide to our caller.
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126 class libcp1_connection : public cc1_plugin::connection
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127 {
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128 public:
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129
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130 libcp1_connection (int fd, int aux_fd, libcp1 *b)
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131 : connection (fd, aux_fd),
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132 back_ptr (b)
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133 {
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134 }
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135
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136 virtual void print (const char *buf)
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137 {
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138 back_ptr->print (buf);
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139 }
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140
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141 libcp1 *back_ptr;
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142 };
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143
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144 libcp1::libcp1 (const gcc_base_vtable *v,
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145 const gcc_cp_fe_vtable *cv)
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146 : connection (NULL),
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147 binding_oracle (NULL),
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148 address_oracle (NULL),
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149 oracle_datum (NULL),
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150 print_function (NULL),
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151 print_datum (NULL),
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152 args (),
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153 source_file (),
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154 verbose (false),
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155 compilerp (new libcp1::compiler (this))
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156 {
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157 base.ops = v;
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158 cp_ops = cv;
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159 }
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160
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161 libcp1::~libcp1 ()
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162 {
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163 delete connection;
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164 delete compilerp;
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165 }
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166
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167
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168
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169 // Enclose these functions in an anonymous namespace because they
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170 // shouldn't be exported, but they can't be static because they're
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171 // used as template arguments.
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172 namespace {
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173 // This is a wrapper function that is called by the RPC system and
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174 // that then forwards the call to the library user. Note that the
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175 // return value is not used; the type cannot be 'void' due to
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176 // limitations in our simple RPC.
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177 int
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178 cp_call_binding_oracle (cc1_plugin::connection *conn,
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179 enum gcc_cp_oracle_request request,
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180 const char *identifier)
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181 {
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182 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
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183
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184 self->binding_oracle (self->oracle_datum, self, request, identifier);
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185 return 1;
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186 }
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187
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188 // This is a wrapper function that is called by the RPC system and
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189 // that then forwards the call to the library user.
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190 gcc_address
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191 cp_call_symbol_address (cc1_plugin::connection *conn, const char *identifier)
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192 {
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193 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
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194
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195 return self->address_oracle (self->oracle_datum, self, identifier);
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196 }
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197
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198 int
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199 cp_call_enter_scope (cc1_plugin::connection *conn)
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200 {
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201 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
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202
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203 self->enter_scope (self->oracle_datum, self);
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204 return 1;
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205 }
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206
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207 int
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208 cp_call_leave_scope (cc1_plugin::connection *conn)
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209 {
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210 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
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211
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212 self->leave_scope (self->oracle_datum, self);
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213 return 1;
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214 }
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215 } /* anonymous namespace */
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216
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217
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218
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219 static void
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220 set_callbacks (struct gcc_cp_context *s,
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221 gcc_cp_oracle_function *binding_oracle,
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222 gcc_cp_symbol_address_function *address_oracle,
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223 gcc_cp_enter_leave_user_expr_scope_function *enter_scope,
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224 gcc_cp_enter_leave_user_expr_scope_function *leave_scope,
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225 void *datum)
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226 {
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227 libcp1 *self = (libcp1 *) s;
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228
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229 self->binding_oracle = binding_oracle;
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230 self->address_oracle = address_oracle;
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231 self->enter_scope = enter_scope;
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232 self->leave_scope = leave_scope;
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233 self->oracle_datum = datum;
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234 }
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235
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236 // Instances of these rpc<> template functions are installed into the
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237 // "cp_vtable". These functions are parameterized by type and method
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238 // name and forward the call via the connection.
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239
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240 template<typename R, const char *&NAME>
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241 R rpc (struct gcc_cp_context *s)
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242 {
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243 libcp1 *self = (libcp1 *) s;
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244 R result;
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245
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246 if (!cc1_plugin::call (self->connection, NAME, &result))
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247 return 0;
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248 return result;
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249 }
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250
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251 template<typename R, const char *&NAME, typename A>
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252 R rpc (struct gcc_cp_context *s, A arg)
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253 {
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254 libcp1 *self = (libcp1 *) s;
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255 R result;
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256
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257 if (!cc1_plugin::call (self->connection, NAME, &result, arg))
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258 return 0;
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259 return result;
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260 }
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261
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262 template<typename R, const char *&NAME, typename A1, typename A2>
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263 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2)
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264 {
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265 libcp1 *self = (libcp1 *) s;
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266 R result;
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267
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268 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2))
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269 return 0;
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270 return result;
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271 }
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272
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273 template<typename R, const char *&NAME, typename A1, typename A2, typename A3>
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274 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3)
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275 {
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276 libcp1 *self = (libcp1 *) s;
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277 R result;
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278
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279 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3))
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280 return 0;
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281 return result;
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282 }
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283
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284 template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
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285 typename A4>
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286 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4)
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287 {
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288 libcp1 *self = (libcp1 *) s;
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289 R result;
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290
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291 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
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292 arg4))
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293 return 0;
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294 return result;
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295 }
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296
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297 template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
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298 typename A4, typename A5>
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299 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5)
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300 {
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301 libcp1 *self = (libcp1 *) s;
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302 R result;
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303
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304 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
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305 arg4, arg5))
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306 return 0;
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307 return result;
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308 }
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309
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310 template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
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311 typename A4, typename A5, typename A6, typename A7>
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312 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5,
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313 A6 arg6, A7 arg7)
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314 {
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315 libcp1 *self = (libcp1 *) s;
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316 R result;
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317
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318 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
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319 arg4, arg5, arg6, arg7))
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320 return 0;
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321 return result;
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322 }
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323
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324 static const struct gcc_cp_fe_vtable cp_vtable =
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325 {
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326 GCC_CP_FE_VERSION_0,
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327 set_callbacks,
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328
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329 #define GCC_METHOD0(R, N) \
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330 rpc<R, cc1_plugin::cp::N>,
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331 #define GCC_METHOD1(R, N, A) \
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332 rpc<R, cc1_plugin::cp::N, A>,
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333 #define GCC_METHOD2(R, N, A, B) \
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334 rpc<R, cc1_plugin::cp::N, A, B>,
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335 #define GCC_METHOD3(R, N, A, B, C) \
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336 rpc<R, cc1_plugin::cp::N, A, B, C>,
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337 #define GCC_METHOD4(R, N, A, B, C, D) \
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338 rpc<R, cc1_plugin::cp::N, A, B, C, D>,
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339 #define GCC_METHOD5(R, N, A, B, C, D, E) \
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340 rpc<R, cc1_plugin::cp::N, A, B, C, D, E>,
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341 #define GCC_METHOD7(R, N, A, B, C, D, E, F, G) \
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342 rpc<R, cc1_plugin::cp::N, A, B, C, D, E, F, G>,
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343
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344 #include "gcc-cp-fe.def"
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345
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346 #undef GCC_METHOD0
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347 #undef GCC_METHOD1
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348 #undef GCC_METHOD2
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349 #undef GCC_METHOD3
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350 #undef GCC_METHOD4
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351 #undef GCC_METHOD5
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352 #undef GCC_METHOD7
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353 };
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354
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355
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356
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357 // Construct an appropriate regexp to match the compiler name.
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358 static std::string
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359 make_regexp (const char *triplet_regexp, const char *compiler)
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360 {
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361 std::stringstream buf;
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362
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363 buf << "^" << triplet_regexp << "-";
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364
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365 // Quote the compiler name in case it has something funny in it.
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366 for (const char *p = compiler; *p; ++p)
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367 {
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368 switch (*p)
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369 {
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370 case '.':
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371 case '^':
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372 case '$':
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373 case '*':
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374 case '+':
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375 case '?':
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376 case '(':
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377 case ')':
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378 case '[':
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379 case '{':
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380 case '\\':
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381 case '|':
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382 buf << '\\';
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383 break;
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384 }
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385 buf << *p;
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386 }
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387 buf << "$";
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388
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389 return buf.str ();
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390 }
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391
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392 static void
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393 libcp1_set_verbose (struct gcc_base_context *s, int /* bool */ verbose)
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394 {
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395 libcp1 *self = (libcp1 *) s;
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396
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397 self->verbose = verbose != 0;
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398 }
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399
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400 char *
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401 libcp1::compiler::find (std::string &compiler ATTRIBUTE_UNUSED) const
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402 {
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403 return xstrdup (_("Compiler has not been specified"));
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404 }
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405
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406 char *
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407 libcp1::compiler_triplet_regexp::find (std::string &compiler) const
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408 {
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409 std::string rx = make_regexp (triplet_regexp_.c_str (), CP_COMPILER_NAME);
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410 if (self_->verbose)
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411 fprintf (stderr, _("searching for compiler matching regex %s\n"),
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412 rx.c_str());
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413 regex_t triplet;
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414 int code = regcomp (&triplet, rx.c_str (), REG_EXTENDED | REG_NOSUB);
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415 if (code != 0)
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416 {
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417 size_t len = regerror (code, &triplet, NULL, 0);
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418 char err[len];
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419
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420 regerror (code, &triplet, err, len);
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421
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422 return concat ("Could not compile regexp \"",
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423 rx.c_str (),
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424 "\": ",
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425 err,
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426 (char *) NULL);
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427 }
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428
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429 if (!find_compiler (triplet, &compiler))
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430 {
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431 regfree (&triplet);
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432 return concat ("Could not find a compiler matching \"",
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433 rx.c_str (),
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434 "\"",
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435 (char *) NULL);
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436 }
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437 regfree (&triplet);
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438 if (self_->verbose)
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439 fprintf (stderr, _("found compiler %s\n"), compiler.c_str());
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440 return NULL;
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441 }
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442
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443 char *
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444 libcp1::compiler_driver_filename::find (std::string &compiler) const
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445 {
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446 // Simulate fnotice by fprintf.
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447 if (self_->verbose)
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448 fprintf (stderr, _("using explicit compiler filename %s\n"),
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449 driver_filename_.c_str());
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450 compiler = driver_filename_;
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451 return NULL;
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452 }
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453
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454 static char *
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455 libcp1_set_arguments (struct gcc_base_context *s,
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456 int argc, char **argv)
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457 {
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458 libcp1 *self = (libcp1 *) s;
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459
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460 std::string compiler;
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461 char *errmsg = self->compilerp->find (compiler);
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462 if (errmsg != NULL)
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463 return errmsg;
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464
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465 self->args.push_back (compiler);
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466
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467 for (int i = 0; i < argc; ++i)
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468 self->args.push_back (argv[i]);
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469
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470 return NULL;
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471 }
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472
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473 static char *
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474 libcp1_set_triplet_regexp (struct gcc_base_context *s,
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475 const char *triplet_regexp)
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476 {
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477 libcp1 *self = (libcp1 *) s;
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478
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479 delete self->compilerp;
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480 self->compilerp = new libcp1::compiler_triplet_regexp (self, triplet_regexp);
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481 return NULL;
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482 }
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483
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484 static char *
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485 libcp1_set_driver_filename (struct gcc_base_context *s,
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486 const char *driver_filename)
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487 {
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488 libcp1 *self = (libcp1 *) s;
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489
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490 delete self->compilerp;
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491 self->compilerp = new libcp1::compiler_driver_filename (self,
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492 driver_filename);
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493 return NULL;
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494 }
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495
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496 static char *
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497 libcp1_set_arguments_v0 (struct gcc_base_context *s,
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498 const char *triplet_regexp,
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499 int argc, char **argv)
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500 {
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501 char *errmsg = libcp1_set_triplet_regexp (s, triplet_regexp);
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502 if (errmsg != NULL)
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503 return errmsg;
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504
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505 return libcp1_set_arguments (s, argc, argv);
|
|
506 }
|
|
507
|
|
508 static void
|
|
509 libcp1_set_source_file (struct gcc_base_context *s,
|
|
510 const char *file)
|
|
511 {
|
|
512 libcp1 *self = (libcp1 *) s;
|
|
513
|
|
514 self->source_file = file;
|
|
515 }
|
|
516
|
|
517 static void
|
|
518 libcp1_set_print_callback (struct gcc_base_context *s,
|
|
519 void (*print_function) (void *datum,
|
|
520 const char *message),
|
|
521 void *datum)
|
|
522 {
|
|
523 libcp1 *self = (libcp1 *) s;
|
|
524
|
|
525 self->print_function = print_function;
|
|
526 self->print_datum = datum;
|
|
527 }
|
|
528
|
|
529 static int
|
|
530 fork_exec (libcp1 *self, char **argv, int spair_fds[2], int stderr_fds[2])
|
|
531 {
|
|
532 pid_t child_pid = fork ();
|
|
533
|
|
534 if (child_pid == -1)
|
|
535 {
|
|
536 close (spair_fds[0]);
|
|
537 close (spair_fds[1]);
|
|
538 close (stderr_fds[0]);
|
|
539 close (stderr_fds[1]);
|
|
540 return 0;
|
|
541 }
|
|
542
|
|
543 if (child_pid == 0)
|
|
544 {
|
|
545 // Child.
|
|
546 dup2 (stderr_fds[1], 1);
|
|
547 dup2 (stderr_fds[1], 2);
|
|
548 close (stderr_fds[0]);
|
|
549 close (stderr_fds[1]);
|
|
550 close (spair_fds[0]);
|
|
551
|
|
552 execvp (argv[0], argv);
|
|
553 _exit (127);
|
|
554 }
|
|
555 else
|
|
556 {
|
|
557 // Parent.
|
|
558 close (spair_fds[1]);
|
|
559 close (stderr_fds[1]);
|
|
560
|
|
561 cc1_plugin::status result = cc1_plugin::FAIL;
|
|
562 if (self->connection->send ('H')
|
|
563 && ::cc1_plugin::marshall (self->connection, GCC_CP_FE_VERSION_0))
|
|
564 result = self->connection->wait_for_query ();
|
|
565
|
|
566 close (spair_fds[0]);
|
|
567 close (stderr_fds[0]);
|
|
568
|
|
569 while (true)
|
|
570 {
|
|
571 int status;
|
|
572
|
|
573 if (waitpid (child_pid, &status, 0) == -1)
|
|
574 {
|
|
575 if (errno != EINTR)
|
|
576 return 0;
|
|
577 }
|
|
578
|
|
579 if (!WIFEXITED (status) || WEXITSTATUS (status) != 0)
|
|
580 return 0;
|
|
581 break;
|
|
582 }
|
|
583
|
|
584 if (!result)
|
|
585 return 0;
|
|
586 return 1;
|
|
587 }
|
|
588 }
|
|
589
|
|
590 static int
|
|
591 libcp1_compile (struct gcc_base_context *s,
|
|
592 const char *filename)
|
|
593 {
|
|
594 libcp1 *self = (libcp1 *) s;
|
|
595
|
|
596 int fds[2];
|
|
597 if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) != 0)
|
|
598 {
|
|
599 self->print ("could not create socketpair\n");
|
|
600 return 0;
|
|
601 }
|
|
602
|
|
603 int stderr_fds[2];
|
|
604 if (pipe (stderr_fds) != 0)
|
|
605 {
|
|
606 self->print ("could not create pipe\n");
|
|
607 close (fds[0]);
|
|
608 close (fds[1]);
|
|
609 return 0;
|
|
610 }
|
|
611
|
|
612 self->args.push_back ("-fplugin=libcp1plugin");
|
|
613 char buf[100];
|
|
614 if (snprintf (buf, sizeof (buf), "-fplugin-arg-libcp1plugin-fd=%d", fds[1])
|
|
615 >= (long) sizeof (buf))
|
|
616 abort ();
|
|
617 self->args.push_back (buf);
|
|
618
|
|
619 self->args.push_back (self->source_file);
|
|
620 self->args.push_back ("-c");
|
|
621 self->args.push_back ("-o");
|
|
622 self->args.push_back (filename);
|
|
623 if (self->verbose)
|
|
624 self->args.push_back ("-v");
|
|
625
|
|
626 self->connection = new libcp1_connection (fds[0], stderr_fds[0], self);
|
|
627
|
|
628 cc1_plugin::callback_ftype *fun
|
|
629 = cc1_plugin::callback<int,
|
|
630 enum gcc_cp_oracle_request,
|
|
631 const char *,
|
|
632 cp_call_binding_oracle>;
|
|
633 self->connection->add_callback ("binding_oracle", fun);
|
|
634
|
|
635 fun = cc1_plugin::callback<gcc_address,
|
|
636 const char *,
|
|
637 cp_call_symbol_address>;
|
|
638 self->connection->add_callback ("address_oracle", fun);
|
|
639
|
|
640 fun = cc1_plugin::callback<int,
|
|
641 cp_call_enter_scope>;
|
|
642 self->connection->add_callback ("enter_scope", fun);
|
|
643
|
|
644 fun = cc1_plugin::callback<int,
|
|
645 cp_call_leave_scope>;
|
|
646 self->connection->add_callback ("leave_scope", fun);
|
|
647
|
|
648 char **argv = new (std::nothrow) char *[self->args.size () + 1];
|
|
649 if (argv == NULL)
|
|
650 return 0;
|
|
651
|
|
652 for (unsigned int i = 0; i < self->args.size (); ++i)
|
|
653 argv[i] = const_cast<char *> (self->args[i].c_str ());
|
|
654 argv[self->args.size ()] = NULL;
|
|
655
|
|
656 return fork_exec (self, argv, fds, stderr_fds);
|
|
657 }
|
|
658
|
|
659 static int
|
|
660 libcp1_compile_v0 (struct gcc_base_context *s, const char *filename,
|
|
661 int verbose)
|
|
662 {
|
|
663 libcp1_set_verbose (s, verbose);
|
|
664 return libcp1_compile (s, filename);
|
|
665 }
|
|
666
|
|
667 static void
|
|
668 libcp1_destroy (struct gcc_base_context *s)
|
|
669 {
|
|
670 libcp1 *self = (libcp1 *) s;
|
|
671
|
|
672 delete self;
|
|
673 }
|
|
674
|
|
675 static const struct gcc_base_vtable vtable =
|
|
676 {
|
|
677 GCC_FE_VERSION_0,
|
|
678 libcp1_set_arguments_v0,
|
|
679 libcp1_set_source_file,
|
|
680 libcp1_set_print_callback,
|
|
681 libcp1_compile_v0,
|
|
682 libcp1_destroy,
|
|
683 libcp1_set_verbose,
|
|
684 libcp1_compile,
|
|
685 libcp1_set_arguments,
|
|
686 libcp1_set_triplet_regexp,
|
|
687 libcp1_set_driver_filename,
|
|
688 };
|
|
689
|
|
690 extern "C" gcc_cp_fe_context_function gcc_cp_fe_context;
|
|
691
|
|
692 #ifdef __GNUC__
|
|
693 #pragma GCC visibility push(default)
|
|
694 #endif
|
|
695
|
|
696 extern "C"
|
|
697 struct gcc_cp_context *
|
|
698 gcc_cp_fe_context (enum gcc_base_api_version base_version,
|
|
699 enum gcc_cp_api_version cp_version)
|
|
700 {
|
|
701 if ((base_version != GCC_FE_VERSION_0 && base_version != GCC_FE_VERSION_1)
|
|
702 || cp_version != GCC_CP_FE_VERSION_0)
|
|
703 return NULL;
|
|
704
|
|
705 return new libcp1 (&vtable, &cp_vtable);
|
|
706 }
|