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// errors.h -- handle errors for gold -*- C++ -*-
// Copyright (C) 2006-2017 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
#ifndef GOLD_ERRORS_H
#define GOLD_ERRORS_H
#include <cstdarg>
#include "gold-threads.h"
namespace gold
{
class Symbol;
template<int size, bool big_endian>
struct Relocate_info;
// This class handles errors for gold. There is a single instance
// which is used by all threads. If and when we make the gold code
// more amenable to being used in a library, we will make this an
// abstract interface class, and expect the caller to provide their
// own instantiation.
class Errors
{
public:
Errors(const char* program_name);
// Report a fatal error. After printing the error, this must exit.
void
fatal(const char* format, va_list) ATTRIBUTE_NORETURN;
// Report a fallback error. After printing the error, this must exit
// with a special status code indicating that fallback to
// --incremental-full is required.
void
fallback(const char* format, va_list) ATTRIBUTE_NORETURN;
// Report an error and continue.
void
error(const char* format, va_list);
// Report a warning and continue.
void
warning(const char* format, va_list);
// Print an informational message and continue.
void
info(const char* format, va_list);
// Report an error at a reloc location.
template<int size, bool big_endian>
void
error_at_location(const Relocate_info<size, big_endian>* relinfo,
size_t relnum, off_t reloffset,
const char* format, va_list);
// Report a warning at a reloc location.
template<int size, bool big_endian>
void
warning_at_location(const Relocate_info<size, big_endian>* relinfo,
size_t relnum, off_t reloffset,
const char* format, va_list);
// Issue an undefined symbol error. LOCATION is the location of
// the error (typically an object file name or relocation info).
void
undefined_symbol(const Symbol* sym, const std::string& location);
// Report a debugging message.
void
debug(const char* format, ...) ATTRIBUTE_PRINTF_2;
// Return the number of errors.
int
error_count() const
{ return this->error_count_; }
// Return the number of warnings.
int
warning_count() const
{ return this->warning_count_; }
private:
Errors(const Errors&);
Errors& operator=(const Errors&);
// Initialize the lock. We don't do this in the constructor because
// lock initialization wants to know whether we are using threads or
// not. This returns true if the lock is now initialized.
bool
initialize_lock();
// Increment a counter, holding the lock.
void
increment_counter(int*);
// The number of times we report an undefined symbol.
static const int max_undefined_error_report = 5;
// The name of the program.
const char* program_name_;
// This class can be accessed from multiple threads. This lock is
// used to control access to the data structures.
Lock* lock_;
// Used to initialize the lock_ field exactly once.
Initialize_lock initialize_lock_;
// Numbers of errors reported.
int error_count_;
// Number of warnings reported.
int warning_count_;
// A map counting the numbers of times we have seen an undefined
// symbol.
Unordered_map<const Symbol*, int> undefined_symbols_;
};
} // End namespace gold.
#endif // !defined(GOLD_ERRORS_H)
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