Imported binutils-2.20

[msp430-binutils.git] / gold / errors.h

diff --git a/gold/errors.h b/gold/errors.h
new file mode 100644 (file)
index 0000000..a8f823d
--- /dev/null
+++ b/gold/errors.h
@@ -0,0 +1,132 @@
+// errors.h -- handle errors for gold  -*- C++ -*-
+
+// Copyright 2006, 2007, 2008 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 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)