gold/errors.cc

   1 // errors.cc -- handle errors for gold
   2
   3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #include "gold.h"
  24
  25 #include <cstdarg>
  26 #include <cstdio>
  27
  28 #include "gold-threads.h"
  29 #include "parameters.h"
  30 #include "object.h"
  31 #include "symtab.h"
  32 #include "errors.h"
  33
  34 namespace gold
  35 {
  36
  37 // Class Errors.
  38
  39 const int Errors::max_undefined_error_report;
  40
  41 Errors::Errors(const char* program_name)
  42   : program_name_(program_name), lock_(NULL), initialize_lock_(&this->lock_),
  43     error_count_(0), warning_count_(0), undefined_symbols_()
  44 {
  45 }
  46
  47 // Initialize the lock_ field.  If we have not yet processed the
  48 // parameters, then we can't initialize, since we don't yet know
  49 // whether we are using threads.  That is OK, since if we haven't
  50 // processed the parameters, we haven't created any threads, and we
  51 // don't need a lock.  Return true if the lock is now initialized.
  52
  53 bool
  54 Errors::initialize_lock()
  55 {
  56   return this->initialize_lock_.initialize();
  57 }
  58
  59 // Increment a counter, holding the lock if available.
  60
  61 void
  62 Errors::increment_counter(int *counter)
  63 {
  64   if (!this->initialize_lock())
  65     {
  66       // The lock does not exist, which means that we don't need it.
  67       ++*counter;
  68     }
  69   else
  70     {
  71       Hold_lock h(*this->lock_);
  72       ++*counter;
  73     }
  74 }
  75
  76 // Report a fatal error.
  77
  78 void
  79 Errors::fatal(const char* format, va_list args)
  80 {
  81   fprintf(stderr, _("%s: fatal error: "), this->program_name_);
  82   vfprintf(stderr, format, args);
  83   fputc('\n', stderr);
  84   gold_exit(GOLD_ERR);
  85 }
  86
  87 // Report a fallback error.
  88
  89 void
  90 Errors::fallback(const char* format, va_list args)
  91 {
  92   fprintf(stderr, _("%s: fatal error: "), this->program_name_);
  93   vfprintf(stderr, format, args);
  94   fputc('\n', stderr);
  95   gold_exit(GOLD_FALLBACK);
  96 }
  97
  98 // Report an error.
  99
 100 void
 101 Errors::error(const char* format, va_list args)
 102 {
 103   fprintf(stderr, _("%s: error: "), this->program_name_);
 104   vfprintf(stderr, format, args);
 105   fputc('\n', stderr);
 106
 107   this->increment_counter(&this->error_count_);
 108 }
 109
 110 // Report a warning.
 111
 112 void
 113 Errors::warning(const char* format, va_list args)
 114 {
 115   fprintf(stderr, _("%s: warning: "), this->program_name_);
 116   vfprintf(stderr, format, args);
 117   fputc('\n', stderr);
 118
 119   this->increment_counter(&this->warning_count_);
 120 }
 121
 122 // Print an informational message.
 123
 124 void
 125 Errors::info(const char* format, va_list args)
 126 {
 127   vfprintf(stderr, format, args);
 128   fputc('\n', stderr);
 129 }
 130
 131 // Report an error at a reloc location.
 132
 133 template<int size, bool big_endian>
 134 void
 135 Errors::error_at_location(const Relocate_info<size, big_endian>* relinfo,
 136                           size_t relnum, off_t reloffset,
 137                           const char* format, va_list args)
 138 {
 139   fprintf(stderr, _("%s: error: "),
 140           relinfo->location(relnum, reloffset).c_str());
 141   vfprintf(stderr, format, args);
 142   fputc('\n', stderr);
 143
 144   this->increment_counter(&this->error_count_);
 145 }
 146
 147 // Report a warning at a reloc location.
 148
 149 template<int size, bool big_endian>
 150 void
 151 Errors::warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 152                             size_t relnum, off_t reloffset,
 153                             const char* format, va_list args)
 154 {
 155   fprintf(stderr, _("%s: warning: "),
 156           relinfo->location(relnum, reloffset).c_str());
 157   vfprintf(stderr, format, args);
 158   fputc('\n', stderr);
 159
 160   this->increment_counter(&this->warning_count_);
 161 }
 162
 163 // Issue an undefined symbol error with a caller-supplied location string.
 164
 165 void
 166 Errors::undefined_symbol(const Symbol* sym, const std::string& location)
 167 {
 168   bool initialized = this->initialize_lock();
 169   gold_assert(initialized);
 170
 171   const char* zmsg;
 172   {
 173     Hold_lock h(*this->lock_);
 174     if (++this->undefined_symbols_[sym] >= max_undefined_error_report)
 175       return;
 176     if (parameters->options().warn_unresolved_symbols())
 177       {
 178         ++this->warning_count_;
 179         zmsg = _("warning");
 180       }
 181     else
 182       {
 183         ++this->error_count_;
 184         zmsg = _("error");
 185       }
 186   }
 187
 188   const char* const version = sym->version();
 189   if (version == NULL)
 190     fprintf(stderr, _("%s: %s: undefined reference to '%s'\n"),
 191             location.c_str(), zmsg, sym->demangled_name().c_str());
 192   else
 193     fprintf(stderr,
 194             _("%s: %s: undefined reference to '%s', version '%s'\n"),
 195             location.c_str(), zmsg, sym->demangled_name().c_str(), version);
 196 }
 197
 198 // Issue a debugging message.
 199
 200 void
 201 Errors::debug(const char* format, ...)
 202 {
 203   fprintf(stderr, _("%s: "), this->program_name_);
 204
 205   va_list args;
 206   va_start(args, format);
 207   vfprintf(stderr, format, args);
 208   va_end(args);
 209
 210   fputc('\n', stderr);
 211 }
 212
 213 // The functions which the rest of the code actually calls.
 214
 215 // Report a fatal error.
 216
 217 void
 218 gold_fatal(const char* format, ...)
 219 {
 220   va_list args;
 221   va_start(args, format);
 222   parameters->errors()->fatal(format, args);
 223   va_end(args);
 224 }
 225
 226 // Report a fallback error.
 227
 228 void
 229 gold_fallback(const char* format, ...)
 230 {
 231   va_list args;
 232   va_start(args, format);
 233   parameters->errors()->fallback(format, args);
 234   va_end(args);
 235 }
 236
 237 // Report an error.
 238
 239 void
 240 gold_error(const char* format, ...)
 241 {
 242   va_list args;
 243   va_start(args, format);
 244   parameters->errors()->error(format, args);
 245   va_end(args);
 246 }
 247
 248 // Report a warning.
 249
 250 void
 251 gold_warning(const char* format, ...)
 252 {
 253   va_list args;
 254   va_start(args, format);
 255   parameters->errors()->warning(format, args);
 256   va_end(args);
 257 }
 258
 259 // Print an informational message.
 260
 261 void
 262 gold_info(const char* format, ...)
 263 {
 264   va_list args;
 265   va_start(args, format);
 266   parameters->errors()->info(format, args);
 267   va_end(args);
 268 }
 269
 270 // Report an error at a location.
 271
 272 template<int size, bool big_endian>
 273 void
 274 gold_error_at_location(const Relocate_info<size, big_endian>* relinfo,
 275                        size_t relnum, off_t reloffset,
 276                        const char* format, ...)
 277 {
 278   va_list args;
 279   va_start(args, format);
 280   parameters->errors()->error_at_location(relinfo, relnum, reloffset,
 281                                           format, args);
 282   va_end(args);
 283 }
 284
 285 // Report a warning at a location.
 286
 287 template<int size, bool big_endian>
 288 void
 289 gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 290                          size_t relnum, off_t reloffset,
 291                          const char* format, ...)
 292 {
 293   va_list args;
 294   va_start(args, format);
 295   parameters->errors()->warning_at_location(relinfo, relnum, reloffset,
 296                                             format, args);
 297   va_end(args);
 298 }
 299
 300 // Report an undefined symbol.
 301
 302 void
 303 gold_undefined_symbol(const Symbol* sym)
 304 {
 305   parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str());
 306 }
 307
 308 // Report an undefined symbol at a reloc location
 309
 310 template<int size, bool big_endian>
 311 void
 312 gold_undefined_symbol_at_location(const Symbol* sym,
 313                       const Relocate_info<size, big_endian>* relinfo,
 314                       size_t relnum, off_t reloffset)
 315 {
 316   parameters->errors()->undefined_symbol(sym,
 317                                          relinfo->location(relnum, reloffset));
 318 }
 319
 320 #ifdef HAVE_TARGET_32_LITTLE
 321 template
 322 void
 323 gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 324                                   size_t relnum, off_t reloffset,
 325                                   const char* format, ...);
 326 #endif
 327
 328 #ifdef HAVE_TARGET_32_BIG
 329 template
 330 void
 331 gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 332                                  size_t relnum, off_t reloffset,
 333                                  const char* format, ...);
 334 #endif
 335
 336 #ifdef HAVE_TARGET_64_LITTLE
 337 template
 338 void
 339 gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 340                                   size_t relnum, off_t reloffset,
 341                                   const char* format, ...);
 342 #endif
 343
 344 #ifdef HAVE_TARGET_64_BIG
 345 template
 346 void
 347 gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 348                                  size_t relnum, off_t reloffset,
 349                                  const char* format, ...);
 350 #endif
 351
 352 #ifdef HAVE_TARGET_32_LITTLE
 353 template
 354 void
 355 gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 356                                     size_t relnum, off_t reloffset,
 357                                     const char* format, ...);
 358 #endif
 359
 360 #ifdef HAVE_TARGET_32_BIG
 361 template
 362 void
 363 gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 364                                    size_t relnum, off_t reloffset,
 365                                    const char* format, ...);
 366 #endif
 367
 368 #ifdef HAVE_TARGET_64_LITTLE
 369 template
 370 void
 371 gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 372                                     size_t relnum, off_t reloffset,
 373                                     const char* format, ...);
 374 #endif
 375
 376 #ifdef HAVE_TARGET_64_BIG
 377 template
 378 void
 379 gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 380                                    size_t relnum, off_t reloffset,
 381                                    const char* format, ...);
 382 #endif
 383
 384 #ifdef HAVE_TARGET_32_LITTLE
 385 template
 386 void
 387 gold_undefined_symbol_at_location<32, false>(
 388     const Symbol* sym,
 389     const Relocate_info<32, false>* relinfo,
 390     size_t relnum, off_t reloffset);
 391 #endif
 392
 393 #ifdef HAVE_TARGET_32_BIG
 394 template
 395 void
 396 gold_undefined_symbol_at_location<32, true>(
 397     const Symbol* sym,
 398     const Relocate_info<32, true>* relinfo,
 399     size_t relnum, off_t reloffset);
 400 #endif
 401
 402 #ifdef HAVE_TARGET_64_LITTLE
 403 template
 404 void
 405 gold_undefined_symbol_at_location<64, false>(
 406     const Symbol* sym,
 407     const Relocate_info<64, false>* relinfo,
 408     size_t relnum, off_t reloffset);
 409 #endif
 410
 411 #ifdef HAVE_TARGET_64_BIG
 412 template
 413 void
 414 gold_undefined_symbol_at_location<64, true>(
 415     const Symbol* sym,
 416     const Relocate_info<64, true>* relinfo,
 417     size_t relnum, off_t reloffset);
 418 #endif
 419
 420 } // End namespace gold.