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(false);
  85 }
  86
  87 // Report an error.
  88
  89 void
  90 Errors::error(const char* format, va_list args)
  91 {
  92   fprintf(stderr, _("%s: error: "), this->program_name_);
  93   vfprintf(stderr, format, args);
  94   fputc('\n', stderr);
  95
  96   this->increment_counter(&this->error_count_);
  97 }
  98
  99 // Report a warning.
 100
 101 void
 102 Errors::warning(const char* format, va_list args)
 103 {
 104   fprintf(stderr, _("%s: warning: "), this->program_name_);
 105   vfprintf(stderr, format, args);
 106   fputc('\n', stderr);
 107
 108   this->increment_counter(&this->warning_count_);
 109 }
 110
 111 // Print an informational message.
 112
 113 void
 114 Errors::info(const char* format, va_list args)
 115 {
 116   vfprintf(stderr, format, args);
 117   fputc('\n', stderr);
 118 }
 119
 120 // Report an error at a reloc location.
 121
 122 template<int size, bool big_endian>
 123 void
 124 Errors::error_at_location(const Relocate_info<size, big_endian>* relinfo,
 125                           size_t relnum, off_t reloffset,
 126                           const char* format, va_list args)
 127 {
 128   fprintf(stderr, _("%s: error: "),
 129           relinfo->location(relnum, reloffset).c_str());
 130   vfprintf(stderr, format, args);
 131   fputc('\n', stderr);
 132
 133   this->increment_counter(&this->error_count_);
 134 }
 135
 136 // Report a warning at a reloc location.
 137
 138 template<int size, bool big_endian>
 139 void
 140 Errors::warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 141                             size_t relnum, off_t reloffset,
 142                             const char* format, va_list args)
 143 {
 144   fprintf(stderr, _("%s: warning: "),
 145           relinfo->location(relnum, reloffset).c_str());
 146   vfprintf(stderr, format, args);
 147   fputc('\n', stderr);
 148
 149   this->increment_counter(&this->warning_count_);
 150 }
 151
 152 // Issue an undefined symbol error with a caller-supplied location string.
 153
 154 void
 155 Errors::undefined_symbol(const Symbol* sym, const std::string& location)
 156 {
 157   bool initialized = this->initialize_lock();
 158   gold_assert(initialized);
 159
 160   const char* zmsg;
 161   {
 162     Hold_lock h(*this->lock_);
 163     if (++this->undefined_symbols_[sym] >= max_undefined_error_report)
 164       return;
 165     if (parameters->options().warn_unresolved_symbols())
 166       {
 167         ++this->warning_count_;
 168         zmsg = _("warning");
 169       }
 170     else
 171       {
 172         ++this->error_count_;
 173         zmsg = _("error");
 174       }
 175   }
 176
 177   const char* const version = sym->version();
 178   if (version == NULL)
 179     fprintf(stderr, _("%s: %s: undefined reference to '%s'\n"),
 180             location.c_str(), zmsg, sym->demangled_name().c_str());
 181   else
 182     fprintf(stderr,
 183             _("%s: %s: undefined reference to '%s', version '%s'\n"),
 184             location.c_str(), zmsg, sym->demangled_name().c_str(), version);
 185 }
 186
 187 // Issue a debugging message.
 188
 189 void
 190 Errors::debug(const char* format, ...)
 191 {
 192   fprintf(stderr, _("%s: "), this->program_name_);
 193
 194   va_list args;
 195   va_start(args, format);
 196   vfprintf(stderr, format, args);
 197   va_end(args);
 198
 199   fputc('\n', stderr);
 200 }
 201
 202 // The functions which the rest of the code actually calls.
 203
 204 // Report a fatal error.
 205
 206 void
 207 gold_fatal(const char* format, ...)
 208 {
 209   va_list args;
 210   va_start(args, format);
 211   parameters->errors()->fatal(format, args);
 212   va_end(args);
 213 }
 214
 215 // Report an error.
 216
 217 void
 218 gold_error(const char* format, ...)
 219 {
 220   va_list args;
 221   va_start(args, format);
 222   parameters->errors()->error(format, args);
 223   va_end(args);
 224 }
 225
 226 // Report a warning.
 227
 228 void
 229 gold_warning(const char* format, ...)
 230 {
 231   va_list args;
 232   va_start(args, format);
 233   parameters->errors()->warning(format, args);
 234   va_end(args);
 235 }
 236
 237 // Print an informational message.
 238
 239 void
 240 gold_info(const char* format, ...)
 241 {
 242   va_list args;
 243   va_start(args, format);
 244   parameters->errors()->info(format, args);
 245   va_end(args);
 246 }
 247
 248 // Report an error at a location.
 249
 250 template<int size, bool big_endian>
 251 void
 252 gold_error_at_location(const Relocate_info<size, big_endian>* relinfo,
 253                        size_t relnum, off_t reloffset,
 254                        const char* format, ...)
 255 {
 256   va_list args;
 257   va_start(args, format);
 258   parameters->errors()->error_at_location(relinfo, relnum, reloffset,
 259                                           format, args);
 260   va_end(args);
 261 }
 262
 263 // Report a warning at a location.
 264
 265 template<int size, bool big_endian>
 266 void
 267 gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 268                          size_t relnum, off_t reloffset,
 269                          const char* format, ...)
 270 {
 271   va_list args;
 272   va_start(args, format);
 273   parameters->errors()->warning_at_location(relinfo, relnum, reloffset,
 274                                             format, args);
 275   va_end(args);
 276 }
 277
 278 // Report an undefined symbol.
 279
 280 void
 281 gold_undefined_symbol(const Symbol* sym)
 282 {
 283   parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str());
 284 }
 285
 286 // Report an undefined symbol at a reloc location
 287
 288 template<int size, bool big_endian>
 289 void
 290 gold_undefined_symbol_at_location(const Symbol* sym,
 291                       const Relocate_info<size, big_endian>* relinfo,
 292                       size_t relnum, off_t reloffset)
 293 {
 294   parameters->errors()->undefined_symbol(sym,
 295                                          relinfo->location(relnum, reloffset));
 296 }
 297
 298 #ifdef HAVE_TARGET_32_LITTLE
 299 template
 300 void
 301 gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 302                                   size_t relnum, off_t reloffset,
 303                                   const char* format, ...);
 304 #endif
 305
 306 #ifdef HAVE_TARGET_32_BIG
 307 template
 308 void
 309 gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 310                                  size_t relnum, off_t reloffset,
 311                                  const char* format, ...);
 312 #endif
 313
 314 #ifdef HAVE_TARGET_64_LITTLE
 315 template
 316 void
 317 gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 318                                   size_t relnum, off_t reloffset,
 319                                   const char* format, ...);
 320 #endif
 321
 322 #ifdef HAVE_TARGET_64_BIG
 323 template
 324 void
 325 gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 326                                  size_t relnum, off_t reloffset,
 327                                  const char* format, ...);
 328 #endif
 329
 330 #ifdef HAVE_TARGET_32_LITTLE
 331 template
 332 void
 333 gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 334                                     size_t relnum, off_t reloffset,
 335                                     const char* format, ...);
 336 #endif
 337
 338 #ifdef HAVE_TARGET_32_BIG
 339 template
 340 void
 341 gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 342                                    size_t relnum, off_t reloffset,
 343                                    const char* format, ...);
 344 #endif
 345
 346 #ifdef HAVE_TARGET_64_LITTLE
 347 template
 348 void
 349 gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 350                                     size_t relnum, off_t reloffset,
 351                                     const char* format, ...);
 352 #endif
 353
 354 #ifdef HAVE_TARGET_64_BIG
 355 template
 356 void
 357 gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 358                                    size_t relnum, off_t reloffset,
 359                                    const char* format, ...);
 360 #endif
 361
 362 #ifdef HAVE_TARGET_32_LITTLE
 363 template
 364 void
 365 gold_undefined_symbol_at_location<32, false>(
 366     const Symbol* sym,
 367     const Relocate_info<32, false>* relinfo,
 368     size_t relnum, off_t reloffset);
 369 #endif
 370
 371 #ifdef HAVE_TARGET_32_BIG
 372 template
 373 void
 374 gold_undefined_symbol_at_location<32, true>(
 375     const Symbol* sym,
 376     const Relocate_info<32, true>* relinfo,
 377     size_t relnum, off_t reloffset);
 378 #endif
 379
 380 #ifdef HAVE_TARGET_64_LITTLE
 381 template
 382 void
 383 gold_undefined_symbol_at_location<64, false>(
 384     const Symbol* sym,
 385     const Relocate_info<64, false>* relinfo,
 386     size_t relnum, off_t reloffset);
 387 #endif
 388
 389 #ifdef HAVE_TARGET_64_BIG
 390 template
 391 void
 392 gold_undefined_symbol_at_location<64, true>(
 393     const Symbol* sym,
 394     const Relocate_info<64, true>* relinfo,
 395     size_t relnum, off_t reloffset);
 396 #endif
 397
 398 } // End namespace gold.