1 // errors.h -- handle errors for gold -*- C++ -*- 2 3 // Copyright (C) 2006-2016 Free Software Foundation, Inc. 4 // Written by Ian Lance Taylor <iant (at) 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 #ifndef GOLD_ERRORS_H 24 #define GOLD_ERRORS_H 25 26 #include <cstdarg> 27 28 #include "gold-threads.h" 29 30 namespace gold 31 { 32 33 class Symbol; 34 template<int size, bool big_endian> 35 struct Relocate_info; 36 37 // This class handles errors for gold. There is a single instance 38 // which is used by all threads. If and when we make the gold code 39 // more amenable to being used in a library, we will make this an 40 // abstract interface class, and expect the caller to provide their 41 // own instantiation. 42 43 class Errors 44 { 45 public: 46 Errors(const char* program_name); 47 48 // Report a fatal error. After printing the error, this must exit. 49 void 50 fatal(const char* format, va_list) ATTRIBUTE_NORETURN; 51 52 // Report a fallback error. After printing the error, this must exit 53 // with a special status code indicating that fallback to 54 // --incremental-full is required. 55 void 56 fallback(const char* format, va_list) ATTRIBUTE_NORETURN; 57 58 // Report an error and continue. 59 void 60 error(const char* format, va_list); 61 62 // Report a warning and continue. 63 void 64 warning(const char* format, va_list); 65 66 // Print an informational message and continue. 67 void 68 info(const char* format, va_list); 69 70 // Report an error at a reloc location. 71 template<int size, bool big_endian> 72 void 73 error_at_location(const Relocate_info<size, big_endian>* relinfo, 74 size_t relnum, off_t reloffset, 75 const char* format, va_list); 76 77 // Report a warning at a reloc location. 78 template<int size, bool big_endian> 79 void 80 warning_at_location(const Relocate_info<size, big_endian>* relinfo, 81 size_t relnum, off_t reloffset, 82 const char* format, va_list); 83 84 // Issue an undefined symbol error. LOCATION is the location of 85 // the error (typically an object file name or relocation info). 86 void 87 undefined_symbol(const Symbol* sym, const std::string& location); 88 89 // Report a debugging message. 90 void 91 debug(const char* format, ...) ATTRIBUTE_PRINTF_2; 92 93 // Return the number of errors. 94 int 95 error_count() const 96 { return this->error_count_; } 97 98 // Return the number of warnings. 99 int 100 warning_count() const 101 { return this->warning_count_; } 102 103 private: 104 Errors(const Errors&); 105 Errors& operator=(const Errors&); 106 107 // Initialize the lock. We don't do this in the constructor because 108 // lock initialization wants to know whether we are using threads or 109 // not. This returns true if the lock is now initialized. 110 bool 111 initialize_lock(); 112 113 // Increment a counter, holding the lock. 114 void 115 increment_counter(int*); 116 117 // The number of times we report an undefined symbol. 118 static const int max_undefined_error_report = 5; 119 120 // The name of the program. 121 const char* program_name_; 122 // This class can be accessed from multiple threads. This lock is 123 // used to control access to the data structures. 124 Lock* lock_; 125 // Used to initialize the lock_ field exactly once. 126 Initialize_lock initialize_lock_; 127 // Numbers of errors reported. 128 int error_count_; 129 // Number of warnings reported. 130 int warning_count_; 131 // A map counting the numbers of times we have seen an undefined 132 // symbol. 133 Unordered_map<const Symbol*, int> undefined_symbols_; 134 }; 135 136 } // End namespace gold. 137 138 #endif // !defined(GOLD_ERRORS_H) 139
