1176434Skaiw// errors.cc -- handle errors for gold 2176434Skaiw 3176434Skaiw// Copyright (C) 2006-2020 Free Software Foundation, Inc. 4176434Skaiw// Written by Ian Lance Taylor <iant@google.com>. 5176434Skaiw 6176434Skaiw// This file is part of gold. 7176434Skaiw 8176434Skaiw// This program is free software; you can redistribute it and/or modify 9176434Skaiw// it under the terms of the GNU General Public License as published by 10176434Skaiw// the Free Software Foundation; either version 3 of the License, or 11176434Skaiw// (at your option) any later version. 12176434Skaiw 13176434Skaiw// This program is distributed in the hope that it will be useful, 14176434Skaiw// but WITHOUT ANY WARRANTY; without even the implied warranty of 15176434Skaiw// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16176434Skaiw// GNU General Public License for more details. 17176434Skaiw 18176434Skaiw// You should have received a copy of the GNU General Public License 19176434Skaiw// along with this program; if not, write to the Free Software 20176434Skaiw// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 21176434Skaiw// MA 02110-1301, USA. 22176434Skaiw 23176434Skaiw#include "gold.h" 24176434Skaiw 25176434Skaiw#include <cstdarg> 26176434Skaiw#include <cstdio> 27176434Skaiw 28176434Skaiw#include "gold-threads.h" 29176434Skaiw#include "parameters.h" 30176434Skaiw#include "object.h" 31176434Skaiw#include "symtab.h" 32176434Skaiw#include "errors.h" 33176434Skaiw 34176434Skaiwnamespace gold 35176434Skaiw{ 36176434Skaiw 37176434Skaiw// Class Errors. 38176434Skaiw 39176434Skaiwconst int Errors::max_undefined_error_report; 40176434Skaiw 41176434SkaiwErrors::Errors(const char* program_name) 42176434Skaiw : program_name_(program_name), lock_(NULL), initialize_lock_(&this->lock_), 43176434Skaiw error_count_(0), warning_count_(0), undefined_symbols_() 44176434Skaiw{ 45176434Skaiw} 46176434Skaiw 47176434Skaiw// Initialize the lock_ field. If we have not yet processed the 48176434Skaiw// parameters, then we can't initialize, since we don't yet know 49176434Skaiw// whether we are using threads. That is OK, since if we haven't 50176434Skaiw// processed the parameters, we haven't created any threads, and we 51176434Skaiw// don't need a lock. Return true if the lock is now initialized. 52176434Skaiw 53176434Skaiwbool 54176434SkaiwErrors::initialize_lock() 55176434Skaiw{ 56176434Skaiw return this->initialize_lock_.initialize(); 57176434Skaiw} 58176434Skaiw 59176434Skaiw// Increment a counter, holding the lock if available. 60176434Skaiw 61176434Skaiwvoid 62176434SkaiwErrors::increment_counter(int *counter) 63176434Skaiw{ 64176434Skaiw if (!this->initialize_lock()) 65176434Skaiw { 66176434Skaiw // The lock does not exist, which means that we don't need it. 67176434Skaiw ++*counter; 68176434Skaiw } 69176434Skaiw else 70176434Skaiw { 71176434Skaiw Hold_lock h(*this->lock_); 72176434Skaiw ++*counter; 73176434Skaiw } 74176434Skaiw} 75176434Skaiw 76176434Skaiw// Report a fatal error. 77176434Skaiw 78176434Skaiwvoid 79176434SkaiwErrors::fatal(const char* format, va_list args) 80176434Skaiw{ 81176434Skaiw fprintf(stderr, _("%s: fatal error: "), this->program_name_); 82176434Skaiw vfprintf(stderr, format, args); 83176434Skaiw fputc('\n', stderr); 84176434Skaiw gold_exit(GOLD_ERR); 85176434Skaiw} 86176434Skaiw 87176434Skaiw// Report a fallback error. 88176434Skaiw 89176434Skaiwvoid 90201166SkientzleErrors::fallback(const char* format, va_list args) 91248612Smm{ 92176434Skaiw fprintf(stderr, _("%s: fatal error: "), this->program_name_); 93176434Skaiw vfprintf(stderr, format, args); 94176434Skaiw fputc('\n', stderr); 95176434Skaiw gold_exit(GOLD_FALLBACK); 96176434Skaiw} 97176434Skaiw 98176434Skaiw// Report an error. 99176434Skaiw 100176434Skaiwvoid 101176434SkaiwErrors::error(const char* format, va_list args) 102176434Skaiw{ 103176434Skaiw fprintf(stderr, _("%s: error: "), this->program_name_); 104176434Skaiw vfprintf(stderr, format, args); 105176434Skaiw fputc('\n', stderr); 106176434Skaiw 107176434Skaiw this->increment_counter(&this->error_count_); 108176434Skaiw} 109176434Skaiw 110176434Skaiw// Report a warning. 111176434Skaiw 112176434Skaiwvoid 113176434SkaiwErrors::warning(const char* format, va_list args) 114176434Skaiw{ 115176434Skaiw fprintf(stderr, _("%s: warning: "), this->program_name_); 116176434Skaiw vfprintf(stderr, format, args); 117176434Skaiw fputc('\n', stderr); 118176434Skaiw 119176434Skaiw this->increment_counter(&this->warning_count_); 120176434Skaiw} 121176434Skaiw 122176434Skaiw// Print an informational message. 123176434Skaiw 124176434Skaiwvoid 125176434SkaiwErrors::info(const char* format, va_list args) 126176434Skaiw{ 127176434Skaiw vfprintf(stderr, format, args); 128176434Skaiw fputc('\n', stderr); 129176434Skaiw} 130176434Skaiw 131176434Skaiw// Report an error at a reloc location. 132176434Skaiw 133176434Skaiwtemplate<int size, bool big_endian> 134176434Skaiwvoid 135176434SkaiwErrors::error_at_location(const Relocate_info<size, big_endian>* relinfo, 136176434Skaiw size_t relnum, off_t reloffset, 137176434Skaiw const char* format, va_list args) 138176434Skaiw{ 139176434Skaiw fprintf(stderr, _("%s: error: "), 140176434Skaiw relinfo->location(relnum, reloffset).c_str()); 141176434Skaiw vfprintf(stderr, format, args); 142176434Skaiw fputc('\n', stderr); 143176434Skaiw 144176434Skaiw this->increment_counter(&this->error_count_); 145176434Skaiw} 146176434Skaiw 147176434Skaiw// Report a warning at a reloc location. 148176434Skaiw 149176434Skaiwtemplate<int size, bool big_endian> 150176434Skaiwvoid 151176434SkaiwErrors::warning_at_location(const Relocate_info<size, big_endian>* relinfo, 152176434Skaiw size_t relnum, off_t reloffset, 153176434Skaiw const char* format, va_list args) 154176434Skaiw{ 155176434Skaiw fprintf(stderr, _("%s: warning: "), 156176434Skaiw relinfo->location(relnum, reloffset).c_str()); 157176434Skaiw vfprintf(stderr, format, args); 158176434Skaiw fputc('\n', stderr); 159176434Skaiw 160176434Skaiw this->increment_counter(&this->warning_count_); 161176434Skaiw} 162176434Skaiw 163176434Skaiw// Issue an undefined symbol error with a caller-supplied location string. 164176434Skaiw 165176434Skaiwvoid 166176434SkaiwErrors::undefined_symbol(const Symbol* sym, const std::string& location) 167176434Skaiw{ 168176434Skaiw bool initialized = this->initialize_lock(); 169176434Skaiw gold_assert(initialized); 170176434Skaiw 171176434Skaiw const char* zmsg; 172176434Skaiw { 173176434Skaiw Hold_lock h(*this->lock_); 174176434Skaiw if (++this->undefined_symbols_[sym] >= max_undefined_error_report) 175176434Skaiw return; 176176434Skaiw if (parameters->options().warn_unresolved_symbols()) 177176434Skaiw { 178176434Skaiw ++this->warning_count_; 179176434Skaiw zmsg = _("warning"); 180176434Skaiw } 181176434Skaiw else 182176434Skaiw { 183176434Skaiw ++this->error_count_; 184176434Skaiw zmsg = _("error"); 185176434Skaiw } 186176434Skaiw } 187176434Skaiw 188176434Skaiw const char* const version = sym->version(); 189176434Skaiw if (version == NULL) 190176434Skaiw fprintf(stderr, _("%s: %s: undefined reference to '%s'\n"), 191176434Skaiw location.c_str(), zmsg, sym->demangled_name().c_str()); 192176434Skaiw else 193176434Skaiw fprintf(stderr, 194176434Skaiw _("%s: %s: undefined reference to '%s', version '%s'\n"), 195176434Skaiw location.c_str(), zmsg, sym->demangled_name().c_str(), version); 196176434Skaiw 197176434Skaiw if (sym->is_cxx_vtable()) 198176434Skaiw gold_info(_("%s: the vtable symbol may be undefined because " 199176434Skaiw "the class is missing its key function"), 200176434Skaiw program_name); 201176434Skaiw if (sym->is_placeholder()) 202248612Smm gold_info(_("%s: the symbol should have been defined by a plugin"), 203176434Skaiw program_name); 204} 205 206// Issue a debugging message. 207 208void 209Errors::debug(const char* format, ...) 210{ 211 fprintf(stderr, _("%s: "), this->program_name_); 212 213 va_list args; 214 va_start(args, format); 215 vfprintf(stderr, format, args); 216 va_end(args); 217 218 fputc('\n', stderr); 219} 220 221// The functions which the rest of the code actually calls. 222 223// Report a fatal error. 224 225void 226gold_fatal(const char* format, ...) 227{ 228 va_list args; 229 va_start(args, format); 230 parameters->errors()->fatal(format, args); 231 va_end(args); 232} 233 234// Report a fallback error. 235 236void 237gold_fallback(const char* format, ...) 238{ 239 va_list args; 240 va_start(args, format); 241 parameters->errors()->fallback(format, args); 242 va_end(args); 243} 244 245// Report an error. 246 247void 248gold_error(const char* format, ...) 249{ 250 va_list args; 251 va_start(args, format); 252 parameters->errors()->error(format, args); 253 va_end(args); 254} 255 256// Report a warning. 257 258void 259gold_warning(const char* format, ...) 260{ 261 va_list args; 262 va_start(args, format); 263 parameters->errors()->warning(format, args); 264 va_end(args); 265} 266 267// Print an informational message. 268 269void 270gold_info(const char* format, ...) 271{ 272 va_list args; 273 va_start(args, format); 274 parameters->errors()->info(format, args); 275 va_end(args); 276} 277 278// Report an error at a location. 279 280template<int size, bool big_endian> 281void 282gold_error_at_location(const Relocate_info<size, big_endian>* relinfo, 283 size_t relnum, off_t reloffset, 284 const char* format, ...) 285{ 286 va_list args; 287 va_start(args, format); 288 parameters->errors()->error_at_location(relinfo, relnum, reloffset, 289 format, args); 290 va_end(args); 291} 292 293// Report a warning at a location. 294 295template<int size, bool big_endian> 296void 297gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo, 298 size_t relnum, off_t reloffset, 299 const char* format, ...) 300{ 301 va_list args; 302 va_start(args, format); 303 parameters->errors()->warning_at_location(relinfo, relnum, reloffset, 304 format, args); 305 va_end(args); 306} 307 308// Report an undefined symbol. 309 310void 311gold_undefined_symbol(const Symbol* sym) 312{ 313 parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str()); 314} 315 316// Report an undefined symbol at a reloc location 317 318template<int size, bool big_endian> 319void 320gold_undefined_symbol_at_location(const Symbol* sym, 321 const Relocate_info<size, big_endian>* relinfo, 322 size_t relnum, off_t reloffset) 323{ 324 parameters->errors()->undefined_symbol(sym, 325 relinfo->location(relnum, reloffset)); 326} 327 328#ifdef HAVE_TARGET_32_LITTLE 329template 330void 331gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo, 332 size_t relnum, off_t reloffset, 333 const char* format, ...); 334#endif 335 336#ifdef HAVE_TARGET_32_BIG 337template 338void 339gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo, 340 size_t relnum, off_t reloffset, 341 const char* format, ...); 342#endif 343 344#ifdef HAVE_TARGET_64_LITTLE 345template 346void 347gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo, 348 size_t relnum, off_t reloffset, 349 const char* format, ...); 350#endif 351 352#ifdef HAVE_TARGET_64_BIG 353template 354void 355gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo, 356 size_t relnum, off_t reloffset, 357 const char* format, ...); 358#endif 359 360#ifdef HAVE_TARGET_32_LITTLE 361template 362void 363gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo, 364 size_t relnum, off_t reloffset, 365 const char* format, ...); 366#endif 367 368#ifdef HAVE_TARGET_32_BIG 369template 370void 371gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo, 372 size_t relnum, off_t reloffset, 373 const char* format, ...); 374#endif 375 376#ifdef HAVE_TARGET_64_LITTLE 377template 378void 379gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo, 380 size_t relnum, off_t reloffset, 381 const char* format, ...); 382#endif 383 384#ifdef HAVE_TARGET_64_BIG 385template 386void 387gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo, 388 size_t relnum, off_t reloffset, 389 const char* format, ...); 390#endif 391 392#ifdef HAVE_TARGET_32_LITTLE 393template 394void 395gold_undefined_symbol_at_location<32, false>( 396 const Symbol* sym, 397 const Relocate_info<32, false>* relinfo, 398 size_t relnum, off_t reloffset); 399#endif 400 401#ifdef HAVE_TARGET_32_BIG 402template 403void 404gold_undefined_symbol_at_location<32, true>( 405 const Symbol* sym, 406 const Relocate_info<32, true>* relinfo, 407 size_t relnum, off_t reloffset); 408#endif 409 410#ifdef HAVE_TARGET_64_LITTLE 411template 412void 413gold_undefined_symbol_at_location<64, false>( 414 const Symbol* sym, 415 const Relocate_info<64, false>* relinfo, 416 size_t relnum, off_t reloffset); 417#endif 418 419#ifdef HAVE_TARGET_64_BIG 420template 421void 422gold_undefined_symbol_at_location<64, true>( 423 const Symbol* sym, 424 const Relocate_info<64, true>* relinfo, 425 size_t relnum, off_t reloffset); 426#endif 427 428} // End namespace gold. 429