gold/errors.cc

   1 // errors.cc -- handle errors for gold
   2
   3 // Copyright (C) 2006-2021 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 // Print a trace message.
 132
 133 void
 134 Errors::trace(const char* format, va_list args)
 135 {
 136   vfprintf(stdout, format, args);
 137   fputc('\n', stdout);
 138 }
 139
 140 // Report an error at a reloc location.
 141
 142 template<int size, bool big_endian>
 143 void
 144 Errors::error_at_location(const Relocate_info<size, big_endian>* relinfo,
 145                           size_t relnum, off_t reloffset,
 146                           const char* format, va_list args)
 147 {
 148   fprintf(stderr, _("%s: error: "),
 149           relinfo->location(relnum, reloffset).c_str());
 150   vfprintf(stderr, format, args);
 151   fputc('\n', stderr);
 152
 153   this->increment_counter(&this->error_count_);
 154 }
 155
 156 // Report a warning at a reloc location.
 157
 158 template<int size, bool big_endian>
 159 void
 160 Errors::warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 161                             size_t relnum, off_t reloffset,
 162                             const char* format, va_list args)
 163 {
 164   fprintf(stderr, _("%s: warning: "),
 165           relinfo->location(relnum, reloffset).c_str());
 166   vfprintf(stderr, format, args);
 167   fputc('\n', stderr);
 168
 169   this->increment_counter(&this->warning_count_);
 170 }
 171
 172 // Issue an undefined symbol error with a caller-supplied location string.
 173
 174 void
 175 Errors::undefined_symbol(const Symbol* sym, const std::string& location)
 176 {
 177   bool initialized = this->initialize_lock();
 178   gold_assert(initialized);
 179
 180   const char* zmsg;
 181   {
 182     Hold_lock h(*this->lock_);
 183     if (++this->undefined_symbols_[sym] >= max_undefined_error_report)
 184       return;
 185     if (parameters->options().warn_unresolved_symbols())
 186       {
 187         ++this->warning_count_;
 188         zmsg = _("warning");
 189       }
 190     else
 191       {
 192         ++this->error_count_;
 193         zmsg = _("error");
 194       }
 195   }
 196
 197   const char* const version = sym->version();
 198   if (version == NULL)
 199     fprintf(stderr, _("%s: %s: undefined reference to '%s'\n"),
 200             location.c_str(), zmsg, sym->demangled_name().c_str());
 201   else
 202     fprintf(stderr,
 203             _("%s: %s: undefined reference to '%s', version '%s'\n"),
 204             location.c_str(), zmsg, sym->demangled_name().c_str(), version);
 205
 206   if (sym->is_cxx_vtable())
 207     gold_info(_("%s: the vtable symbol may be undefined because "
 208                 "the class is missing its key function"),
 209               program_name);
 210   if (sym->is_placeholder())
 211     gold_info(_("%s: the symbol should have been defined by a plugin"),
 212               program_name);
 213 }
 214
 215 // Issue a debugging message.
 216
 217 void
 218 Errors::debug(const char* format, ...)
 219 {
 220   fprintf(stderr, _("%s: "), this->program_name_);
 221
 222   va_list args;
 223   va_start(args, format);
 224   vfprintf(stderr, format, args);
 225   va_end(args);
 226
 227   fputc('\n', stderr);
 228 }
 229
 230 // The functions which the rest of the code actually calls.
 231
 232 // Report a fatal error.
 233
 234 void
 235 gold_fatal(const char* format, ...)
 236 {
 237   va_list args;
 238   va_start(args, format);
 239   parameters->errors()->fatal(format, args);
 240   va_end(args);
 241 }
 242
 243 // Report a fallback error.
 244
 245 void
 246 gold_fallback(const char* format, ...)
 247 {
 248   va_list args;
 249   va_start(args, format);
 250   parameters->errors()->fallback(format, args);
 251   va_end(args);
 252 }
 253
 254 // Report an error.
 255
 256 void
 257 gold_error(const char* format, ...)
 258 {
 259   va_list args;
 260   va_start(args, format);
 261   parameters->errors()->error(format, args);
 262   va_end(args);
 263 }
 264
 265 // Report a warning.
 266
 267 void
 268 gold_warning(const char* format, ...)
 269 {
 270   va_list args;
 271   va_start(args, format);
 272   parameters->errors()->warning(format, args);
 273   va_end(args);
 274 }
 275
 276 // Print an informational message.
 277
 278 void
 279 gold_info(const char* format, ...)
 280 {
 281   va_list args;
 282   va_start(args, format);
 283   parameters->errors()->info(format, args);
 284   va_end(args);
 285 }
 286
 287 // Print a trace message (to stdout).
 288
 289 void
 290 gold_trace(const char* format, ...)
 291 {
 292   va_list args;
 293   va_start(args, format);
 294   parameters->errors()->trace(format, args);
 295   va_end(args);
 296 }
 297
 298 // Report an error at a location.
 299
 300 template<int size, bool big_endian>
 301 void
 302 gold_error_at_location(const Relocate_info<size, big_endian>* relinfo,
 303                        size_t relnum, off_t reloffset,
 304                        const char* format, ...)
 305 {
 306   va_list args;
 307   va_start(args, format);
 308   parameters->errors()->error_at_location(relinfo, relnum, reloffset,
 309                                           format, args);
 310   va_end(args);
 311 }
 312
 313 // Report a warning at a location.
 314
 315 template<int size, bool big_endian>
 316 void
 317 gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 318                          size_t relnum, off_t reloffset,
 319                          const char* format, ...)
 320 {
 321   va_list args;
 322   va_start(args, format);
 323   parameters->errors()->warning_at_location(relinfo, relnum, reloffset,
 324                                             format, args);
 325   va_end(args);
 326 }
 327
 328 // Report an undefined symbol.
 329
 330 void
 331 gold_undefined_symbol(const Symbol* sym)
 332 {
 333   parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str());
 334 }
 335
 336 // Report an undefined symbol at a reloc location
 337
 338 template<int size, bool big_endian>
 339 void
 340 gold_undefined_symbol_at_location(const Symbol* sym,
 341                       const Relocate_info<size, big_endian>* relinfo,
 342                       size_t relnum, off_t reloffset)
 343 {
 344   parameters->errors()->undefined_symbol(sym,
 345                                          relinfo->location(relnum, reloffset));
 346 }
 347
 348 #ifdef HAVE_TARGET_32_LITTLE
 349 template
 350 void
 351 gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 352                                   size_t relnum, off_t reloffset,
 353                                   const char* format, ...);
 354 #endif
 355
 356 #ifdef HAVE_TARGET_32_BIG
 357 template
 358 void
 359 gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 360                                  size_t relnum, off_t reloffset,
 361                                  const char* format, ...);
 362 #endif
 363
 364 #ifdef HAVE_TARGET_64_LITTLE
 365 template
 366 void
 367 gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 368                                   size_t relnum, off_t reloffset,
 369                                   const char* format, ...);
 370 #endif
 371
 372 #ifdef HAVE_TARGET_64_BIG
 373 template
 374 void
 375 gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 376                                  size_t relnum, off_t reloffset,
 377                                  const char* format, ...);
 378 #endif
 379
 380 #ifdef HAVE_TARGET_32_LITTLE
 381 template
 382 void
 383 gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 384                                     size_t relnum, off_t reloffset,
 385                                     const char* format, ...);
 386 #endif
 387
 388 #ifdef HAVE_TARGET_32_BIG
 389 template
 390 void
 391 gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 392                                    size_t relnum, off_t reloffset,
 393                                    const char* format, ...);
 394 #endif
 395
 396 #ifdef HAVE_TARGET_64_LITTLE
 397 template
 398 void
 399 gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 400                                     size_t relnum, off_t reloffset,
 401                                     const char* format, ...);
 402 #endif
 403
 404 #ifdef HAVE_TARGET_64_BIG
 405 template
 406 void
 407 gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 408                                    size_t relnum, off_t reloffset,
 409                                    const char* format, ...);
 410 #endif
 411
 412 #ifdef HAVE_TARGET_32_LITTLE
 413 template
 414 void
 415 gold_undefined_symbol_at_location<32, false>(
 416     const Symbol* sym,
 417     const Relocate_info<32, false>* relinfo,
 418     size_t relnum, off_t reloffset);
 419 #endif
 420
 421 #ifdef HAVE_TARGET_32_BIG
 422 template
 423 void
 424 gold_undefined_symbol_at_location<32, true>(
 425     const Symbol* sym,
 426     const Relocate_info<32, true>* relinfo,
 427     size_t relnum, off_t reloffset);
 428 #endif
 429
 430 #ifdef HAVE_TARGET_64_LITTLE
 431 template
 432 void
 433 gold_undefined_symbol_at_location<64, false>(
 434     const Symbol* sym,
 435     const Relocate_info<64, false>* relinfo,
 436     size_t relnum, off_t reloffset);
 437 #endif
 438
 439 #ifdef HAVE_TARGET_64_BIG
 440 template
 441 void
 442 gold_undefined_symbol_at_location<64, true>(
 443     const Symbol* sym,
 444     const Relocate_info<64, true>* relinfo,
 445     size_t relnum, off_t reloffset);
 446 #endif
 447
 448 } // End namespace gold.