gold/errors.cc

   1 // errors.cc -- handle errors for gold
   2
   3 // Copyright (C) 2006-2015 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   if (sym->is_cxx_vtable())
 198     gold_info(_("%s: the vtable symbol may be undefined because "
 199                 "the class is missing its key function"),
 200               program_name);
 201 }
 202
 203 // Issue a debugging message.
 204
 205 void
 206 Errors::debug(const char* format, ...)
 207 {
 208   fprintf(stderr, _("%s: "), this->program_name_);
 209
 210   va_list args;
 211   va_start(args, format);
 212   vfprintf(stderr, format, args);
 213   va_end(args);
 214
 215   fputc('\n', stderr);
 216 }
 217
 218 // The functions which the rest of the code actually calls.
 219
 220 // Report a fatal error.
 221
 222 void
 223 gold_fatal(const char* format, ...)
 224 {
 225   va_list args;
 226   va_start(args, format);
 227   parameters->errors()->fatal(format, args);
 228   va_end(args);
 229 }
 230
 231 // Report a fallback error.
 232
 233 void
 234 gold_fallback(const char* format, ...)
 235 {
 236   va_list args;
 237   va_start(args, format);
 238   parameters->errors()->fallback(format, args);
 239   va_end(args);
 240 }
 241
 242 // Report an error.
 243
 244 void
 245 gold_error(const char* format, ...)
 246 {
 247   va_list args;
 248   va_start(args, format);
 249   parameters->errors()->error(format, args);
 250   va_end(args);
 251 }
 252
 253 // Report a warning.
 254
 255 void
 256 gold_warning(const char* format, ...)
 257 {
 258   va_list args;
 259   va_start(args, format);
 260   parameters->errors()->warning(format, args);
 261   va_end(args);
 262 }
 263
 264 // Print an informational message.
 265
 266 void
 267 gold_info(const char* format, ...)
 268 {
 269   va_list args;
 270   va_start(args, format);
 271   parameters->errors()->info(format, args);
 272   va_end(args);
 273 }
 274
 275 // Report an error at a location.
 276
 277 template<int size, bool big_endian>
 278 void
 279 gold_error_at_location(const Relocate_info<size, big_endian>* relinfo,
 280                        size_t relnum, off_t reloffset,
 281                        const char* format, ...)
 282 {
 283   va_list args;
 284   va_start(args, format);
 285   parameters->errors()->error_at_location(relinfo, relnum, reloffset,
 286                                           format, args);
 287   va_end(args);
 288 }
 289
 290 // Report a warning at a location.
 291
 292 template<int size, bool big_endian>
 293 void
 294 gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 295                          size_t relnum, off_t reloffset,
 296                          const char* format, ...)
 297 {
 298   va_list args;
 299   va_start(args, format);
 300   parameters->errors()->warning_at_location(relinfo, relnum, reloffset,
 301                                             format, args);
 302   va_end(args);
 303 }
 304
 305 // Report an undefined symbol.
 306
 307 void
 308 gold_undefined_symbol(const Symbol* sym)
 309 {
 310   parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str());
 311 }
 312
 313 // Report an undefined symbol at a reloc location
 314
 315 template<int size, bool big_endian>
 316 void
 317 gold_undefined_symbol_at_location(const Symbol* sym,
 318                       const Relocate_info<size, big_endian>* relinfo,
 319                       size_t relnum, off_t reloffset)
 320 {
 321   parameters->errors()->undefined_symbol(sym,
 322                                          relinfo->location(relnum, reloffset));
 323 }
 324
 325 #ifdef HAVE_TARGET_32_LITTLE
 326 template
 327 void
 328 gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 329                                   size_t relnum, off_t reloffset,
 330                                   const char* format, ...);
 331 #endif
 332
 333 #ifdef HAVE_TARGET_32_BIG
 334 template
 335 void
 336 gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 337                                  size_t relnum, off_t reloffset,
 338                                  const char* format, ...);
 339 #endif
 340
 341 #ifdef HAVE_TARGET_64_LITTLE
 342 template
 343 void
 344 gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 345                                   size_t relnum, off_t reloffset,
 346                                   const char* format, ...);
 347 #endif
 348
 349 #ifdef HAVE_TARGET_64_BIG
 350 template
 351 void
 352 gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 353                                  size_t relnum, off_t reloffset,
 354                                  const char* format, ...);
 355 #endif
 356
 357 #ifdef HAVE_TARGET_32_LITTLE
 358 template
 359 void
 360 gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 361                                     size_t relnum, off_t reloffset,
 362                                     const char* format, ...);
 363 #endif
 364
 365 #ifdef HAVE_TARGET_32_BIG
 366 template
 367 void
 368 gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 369                                    size_t relnum, off_t reloffset,
 370                                    const char* format, ...);
 371 #endif
 372
 373 #ifdef HAVE_TARGET_64_LITTLE
 374 template
 375 void
 376 gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 377                                     size_t relnum, off_t reloffset,
 378                                     const char* format, ...);
 379 #endif
 380
 381 #ifdef HAVE_TARGET_64_BIG
 382 template
 383 void
 384 gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 385                                    size_t relnum, off_t reloffset,
 386                                    const char* format, ...);
 387 #endif
 388
 389 #ifdef HAVE_TARGET_32_LITTLE
 390 template
 391 void
 392 gold_undefined_symbol_at_location<32, false>(
 393     const Symbol* sym,
 394     const Relocate_info<32, false>* relinfo,
 395     size_t relnum, off_t reloffset);
 396 #endif
 397
 398 #ifdef HAVE_TARGET_32_BIG
 399 template
 400 void
 401 gold_undefined_symbol_at_location<32, true>(
 402     const Symbol* sym,
 403     const Relocate_info<32, true>* relinfo,
 404     size_t relnum, off_t reloffset);
 405 #endif
 406
 407 #ifdef HAVE_TARGET_64_LITTLE
 408 template
 409 void
 410 gold_undefined_symbol_at_location<64, false>(
 411     const Symbol* sym,
 412     const Relocate_info<64, false>* relinfo,
 413     size_t relnum, off_t reloffset);
 414 #endif
 415
 416 #ifdef HAVE_TARGET_64_BIG
 417 template
 418 void
 419 gold_undefined_symbol_at_location<64, true>(
 420     const Symbol* sym,
 421     const Relocate_info<64, true>* relinfo,
 422     size_t relnum, off_t reloffset);
 423 #endif
 424
 425 } // End namespace gold.