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// errors.cc -- handle errors for gold

// Copyright 2006, 2007, 2008, 2009, 2010, 2011 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.

#include "gold.h"

#include <cstdarg>

#include <cstdio>

#include "gold-threads.h"

#include "parameters.h"

#include "object.h"

#include "symtab.h"

#include "errors.h"

namespace gold

{

// Class Errors.

const int Errors::max_undefined_error_report;

Errors::Errors(const char* program_name)

  : program_name_(program_name), lock_(NULL), initialize_lock_(&this->lock_),

    error_count_(0), warning_count_(0), undefined_symbols_()

{

}

// Initialize the lock_ field.  If we have not yet processed the

// parameters, then we can't initialize, since we don't yet know

// whether we are using threads.  That is OK, since if we haven't

// processed the parameters, we haven't created any threads, and we

// don't need a lock.  Return true if the lock is now initialized.

bool

Errors::initialize_lock()

{

  return this->initialize_lock_.initialize();

}

// Increment a counter, holding the lock if available.

void

Errors::increment_counter(int *counter)

{

  if (!this->initialize_lock())

    {

      // The lock does not exist, which means that we don't need it.

      ++*counter;

    }

  else

    {

      Hold_lock h(*this->lock_);

      ++*counter;

    }

}

// Report a fatal error.

void

Errors::fatal(const char* format, va_list args)

{

  fprintf(stderr, _("%s: fatal error: "), this->program_name_);

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

  gold_exit(GOLD_ERR);

}

// Report a fallback error.

void

Errors::fallback(const char* format, va_list args)

{

  fprintf(stderr, _("%s: fatal error: "), this->program_name_);

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

  gold_exit(GOLD_FALLBACK);

}

// Report an error.

void

Errors::error(const char* format, va_list args)

{

  fprintf(stderr, _("%s: error: "), this->program_name_);

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

  this->increment_counter(&this->error_count_);

}

// Report a warning.

void

Errors::warning(const char* format, va_list args)

{

  fprintf(stderr, _("%s: warning: "), this->program_name_);

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

  this->increment_counter(&this->warning_count_);

}

// Print an informational message.

void

Errors::info(const char* format, va_list args)

{

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

}

// Report an error at a reloc location.

template<int size, bool big_endian>

void

Errors::error_at_location(const Relocate_info<size, big_endian>* relinfo,

                          size_t relnum, off_t reloffset,

                          const char* format, va_list args)

{

  fprintf(stderr, _("%s: error: "),

          relinfo->location(relnum, reloffset).c_str());

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

  this->increment_counter(&this->error_count_);

}

// Report a warning at a reloc location.

template<int size, bool big_endian>

void

Errors::warning_at_location(const Relocate_info<size, big_endian>* relinfo,

                            size_t relnum, off_t reloffset,

                            const char* format, va_list args)

{

  fprintf(stderr, _("%s: warning: "),

          relinfo->location(relnum, reloffset).c_str());

  vfprintf(stderr, format, args);

  fputc('\n', stderr);

  this->increment_counter(&this->warning_count_);

}

// Issue an undefined symbol error with a caller-supplied location string.

void

Errors::undefined_symbol(const Symbol* sym, const std::string& location)

{

  bool initialized = this->initialize_lock();

  gold_assert(initialized);

  const char* zmsg;

  {

    Hold_lock h(*this->lock_);

    if (++this->undefined_symbols_[sym] >= max_undefined_error_report)

      return;

    if (parameters->options().warn_unresolved_symbols())

      {

        ++this->warning_count_;

        zmsg = _("warning");

      }

    else

      {

        ++this->error_count_;

        zmsg = _("error");

      }

  }

  const char* const version = sym->version();

  if (version == NULL)

    fprintf(stderr, _("%s: %s: undefined reference to '%s'\n"),

            location.c_str(), zmsg, sym->demangled_name().c_str());

  else

    fprintf(stderr,

            _("%s: %s: undefined reference to '%s', version '%s'\n"),

            location.c_str(), zmsg, sym->demangled_name().c_str(), version);

}

// Issue a debugging message.

void

Errors::debug(const char* format, ...)

{

  fprintf(stderr, _("%s: "), this->program_name_);

  va_list args;

  va_start(args, format);

  vfprintf(stderr, format, args);

  va_end(args);

  fputc('\n', stderr);

}

// The functions which the rest of the code actually calls.

// Report a fatal error.

void

gold_fatal(const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->fatal(format, args);

  va_end(args);

}

// Report a fallback error.

void

gold_fallback(const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->fallback(format, args);

  va_end(args);

}

// Report an error.

void

gold_error(const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->error(format, args);

  va_end(args);

}

// Report a warning.

void

gold_warning(const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->warning(format, args);

  va_end(args);

}

// Print an informational message.

void

gold_info(const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->info(format, args);

  va_end(args);

}

// Report an error at a location.

template<int size, bool big_endian>

void

gold_error_at_location(const Relocate_info<size, big_endian>* relinfo,

                       size_t relnum, off_t reloffset,

                       const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->error_at_location(relinfo, relnum, reloffset,

                                          format, args);

  va_end(args);

}

// Report a warning at a location.

template<int size, bool big_endian>

void

gold_warning_at_location(const Relocate_info<size, big_endian>* relinfo,

                         size_t relnum, off_t reloffset,

                         const char* format, ...)

{

  va_list args;

  va_start(args, format);

  parameters->errors()->warning_at_location(relinfo, relnum, reloffset,

                                            format, args);

  va_end(args);

}

// Report an undefined symbol.

void

gold_undefined_symbol(const Symbol* sym)

{

  parameters->errors()->undefined_symbol(sym, sym->object()->name().c_str());

}

// Report an undefined symbol at a reloc location

template<int size, bool big_endian>

void

gold_undefined_symbol_at_location(const Symbol* sym,

                      const Relocate_info<size, big_endian>* relinfo,

                      size_t relnum, off_t reloffset)

{

  parameters->errors()->undefined_symbol(sym,

                                         relinfo->location(relnum, reloffset));

}

#ifdef HAVE_TARGET_32_LITTLE

template

void

gold_error_at_location<32, false>(const Relocate_info<32, false>* relinfo,

                                  size_t relnum, off_t reloffset,

                                  const char* format, ...);

#endif

#ifdef HAVE_TARGET_32_BIG

template

void

gold_error_at_location<32, true>(const Relocate_info<32, true>* relinfo,

                                 size_t relnum, off_t reloffset,

                                 const char* format, ...);

#endif

#ifdef HAVE_TARGET_64_LITTLE

template

void

gold_error_at_location<64, false>(const Relocate_info<64, false>* relinfo,

                                  size_t relnum, off_t reloffset,

                                  const char* format, ...);

#endif

#ifdef HAVE_TARGET_64_BIG

template

void

gold_error_at_location<64, true>(const Relocate_info<64, true>* relinfo,

                                 size_t relnum, off_t reloffset,

                                 const char* format, ...);

#endif

#ifdef HAVE_TARGET_32_LITTLE

template

void

gold_warning_at_location<32, false>(const Relocate_info<32, false>* relinfo,

                                    size_t relnum, off_t reloffset,

                                    const char* format, ...);

#endif

#ifdef HAVE_TARGET_32_BIG

template

void

gold_warning_at_location<32, true>(const Relocate_info<32, true>* relinfo,

                                   size_t relnum, off_t reloffset,

                                   const char* format, ...);

#endif

#ifdef HAVE_TARGET_64_LITTLE

template

void

gold_warning_at_location<64, false>(const Relocate_info<64, false>* relinfo,

                                    size_t relnum, off_t reloffset,

                                    const char* format, ...);

#endif

#ifdef HAVE_TARGET_64_BIG

template

void

gold_warning_at_location<64, true>(const Relocate_info<64, true>* relinfo,

                                   size_t relnum, off_t reloffset,

                                   const char* format, ...);

#endif

#ifdef HAVE_TARGET_32_LITTLE

template

void

gold_undefined_symbol_at_location<32, false>(

    const Symbol* sym,

    const Relocate_info<32, false>* relinfo,

    size_t relnum, off_t reloffset);

#endif

#ifdef HAVE_TARGET_32_BIG

template

void

gold_undefined_symbol_at_location<32, true>(

    const Symbol* sym,

    const Relocate_info<32, true>* relinfo,

    size_t relnum, off_t reloffset);

#endif

#ifdef HAVE_TARGET_64_LITTLE

template

void

gold_undefined_symbol_at_location<64, false>(

    const Symbol* sym,

    const Relocate_info<64, false>* relinfo,

    size_t relnum, off_t reloffset);

#endif

#ifdef HAVE_TARGET_64_BIG

template

void

gold_undefined_symbol_at_location<64, true>(

    const Symbol* sym,

    const Relocate_info<64, true>* relinfo,

    size_t relnum, off_t reloffset);

#endif

} // End namespace gold.