gold/errors.cc

   1 // errors.cc -- handle errors for gold
   2
   3 // Copyright 2006, 2007, 2008, 2009, 2010 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: %s: error: "), this->program_name_,
 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: %s: warning: "), this->program_name_,
 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: %s: undefined reference to '%s'\n"),
 180             this->program_name_, location.c_str(), zmsg,
 181             sym->demangled_name().c_str());
 182   else
 183     fprintf(stderr,
 184             _("%s: %s: %s: undefined reference to '%s', version '%s'\n"),
 185             this->program_name_, location.c_str(), zmsg,
 186             sym->demangled_name().c_str(), version);
 187 }
 188
 189 // Issue a debugging message.
 190
 191 void
 192 Errors::debug(const char* format, ...)
 193 {
 194   fprintf(stderr, _("%s: "), this->program_name_);
 195
 196   va_list args;
 197   va_start(args, format);
 198   vfprintf(stderr, format, args);
 199   va_end(args);
 200
 201   fputc('\n', stderr);
 202 }
 203
 204 // The functions which the rest of the code actually calls.
 205
 206 // Report a fatal error.
 207
 208 void
 209 gold_fatal(const char* format, ...)
 210 {
 211   va_list args;
 212   va_start(args, format);
 213   parameters->errors()->fatal(format, args);
 214   va_end(args);
 215 }
 216
 217 // Report an error.
 218
 219 void
 220 gold_error(const char* format, ...)
 221 {
 222   va_list args;
 223   va_start(args, format);
 224   parameters->errors()->error(format, args);
 225   va_end(args);
 226 }
 227
 228 // Report a warning.
 229
 230 void
 231 gold_warning(const char* format, ...)
 232 {
 233   va_list args;
 234   va_start(args, format);
 235   parameters->errors()->warning(format, args);
 236   va_end(args);
 237 }
 238
 239 // Print an informational message.
 240
 241 void
 242 gold_info(const char* format, ...)
 243 {
 244   va_list args;
 245   va_start(args, format);
 246   parameters->errors()->info(format, args);
 247   va_end(args);
 248 }
 249
 250 // Report an error at a location.
 251
 252 template<int size, bool big_endian>
 253 void
 254 gold_error_at_location(const Relocate_info<size, big_endian>* relinfo,
 255                        size_t relnum, off_t reloffset,
 256                        const char* format, ...)
 257 {
 258   va_list args;
 259   va_start(args, format);
 260   parameters->errors()->error_at_location(relinfo, relnum, reloffset,
 261                                           format, args);
 262   va_end(args);
 263 }
 264
 265 // Report a warning at a location.
 266
 267 template<int size, bool big_endian>
 268 void
 269 gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo,
 270                          size_t relnum, off_t reloffset,
 271                          const char* format, ...)
 272 {
 273   va_list args;
 274   va_start(args, format);
 275   parameters->errors()->warning_at_location(relinfo, relnum, reloffset,
 276                                             format, args);
 277   va_end(args);
 278 }
 279
 280 // Report an undefined symbol.
 281
 282 void
 283 gold_undefined_symbol(const Symbol* sym)
 284 {
 285   parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str());
 286 }
 287
 288 // Report an undefined symbol at a reloc location
 289
 290 template<int size, bool big_endian>
 291 void
 292 gold_undefined_symbol_at_location(const Symbol* sym,
 293                       const Relocate_info<size, big_endian>* relinfo,
 294                       size_t relnum, off_t reloffset)
 295 {
 296   parameters->errors()->undefined_symbol(sym,
 297                                          relinfo->location(relnum, reloffset));
 298 }
 299
 300 #ifdef HAVE_TARGET_32_LITTLE
 301 template
 302 void
 303 gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 304                                   size_t relnum, off_t reloffset,
 305                                   const char* format, ...);
 306 #endif
 307
 308 #ifdef HAVE_TARGET_32_BIG
 309 template
 310 void
 311 gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 312                                  size_t relnum, off_t reloffset,
 313                                  const char* format, ...);
 314 #endif
 315
 316 #ifdef HAVE_TARGET_64_LITTLE
 317 template
 318 void
 319 gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 320                                   size_t relnum, off_t reloffset,
 321                                   const char* format, ...);
 322 #endif
 323
 324 #ifdef HAVE_TARGET_64_BIG
 325 template
 326 void
 327 gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 328                                  size_t relnum, off_t reloffset,
 329                                  const char* format, ...);
 330 #endif
 331
 332 #ifdef HAVE_TARGET_32_LITTLE
 333 template
 334 void
 335 gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo,
 336                                     size_t relnum, off_t reloffset,
 337                                     const char* format, ...);
 338 #endif
 339
 340 #ifdef HAVE_TARGET_32_BIG
 341 template
 342 void
 343 gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo,
 344                                    size_t relnum, off_t reloffset,
 345                                    const char* format, ...);
 346 #endif
 347
 348 #ifdef HAVE_TARGET_64_LITTLE
 349 template
 350 void
 351 gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo,
 352                                     size_t relnum, off_t reloffset,
 353                                     const char* format, ...);
 354 #endif
 355
 356 #ifdef HAVE_TARGET_64_BIG
 357 template
 358 void
 359 gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo,
 360                                    size_t relnum, off_t reloffset,
 361                                    const char* format, ...);
 362 #endif
 363
 364 #ifdef HAVE_TARGET_32_LITTLE
 365 template
 366 void
 367 gold_undefined_symbol_at_location<32, false>(
 368     const Symbol* sym,
 369     const Relocate_info<32, false>* relinfo,
 370     size_t relnum, off_t reloffset);
 371 #endif
 372
 373 #ifdef HAVE_TARGET_32_BIG
 374 template
 375 void
 376 gold_undefined_symbol_at_location<32, true>(
 377     const Symbol* sym,
 378     const Relocate_info<32, true>* relinfo,
 379     size_t relnum, off_t reloffset);
 380 #endif
 381
 382 #ifdef HAVE_TARGET_64_LITTLE
 383 template
 384 void
 385 gold_undefined_symbol_at_location<64, false>(
 386     const Symbol* sym,
 387     const Relocate_info<64, false>* relinfo,
 388     size_t relnum, off_t reloffset);
 389 #endif
 390
 391 #ifdef HAVE_TARGET_64_BIG
 392 template
 393 void
 394 gold_undefined_symbol_at_location<64, true>(
 395     const Symbol* sym,
 396     const Relocate_info<64, true>* relinfo,
 397     size_t relnum, off_t reloffset);
 398 #endif
 399
 400 } // End namespace gold.