/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#ifndef SHARE_VM_UTILITIES_VMERROR_HPP

#define SHARE_VM_UTILITIES_VMERROR_HPP

#include "utilities/globalDefinitions.hpp"

class VM_ReportJavaOutOfMemory;

class VMError : public StackObj {

  friend class VM_ReportJavaOutOfMemory;

  enum ErrorType {

    internal_error = 0xe0000000,

    oom_error      = 0xe0000001

  };

  int          _id;          // Solaris/Linux signals: 0 - SIGRTMAX

                             // Windows exceptions: 0xCxxxxxxx system errors

                             //                     0x8xxxxxxx system warnings

  const char * _message;

  const char * _detail_msg;

  Thread *     _thread;      // NULL if it's native thread

  // additional info for crashes

  address      _pc;          // faulting PC

  void *       _siginfo;     // ExceptionRecord on Windows,

                             // siginfo_t on Solaris/Linux

  void *       _context;     // ContextRecord on Windows,

                             // ucontext_t on Solaris/Linux

  // additional info for VM internal errors

  const char * _filename;

  int          _lineno;

  // used by fatal error handler

  int          _current_step;

  const char * _current_step_info;

  int          _verbose;

  // First error, and its thread id. We must be able to handle native thread,

  // so use thread id instead of Thread* to identify thread.

  static VMError* volatile first_error;

  static volatile jlong    first_error_tid;

  // used by reporting about OOM

  size_t       _size;

  // set signal handlers on Solaris/Linux or the default exception filter

  // on Windows, to handle recursive crashes.

  void reset_signal_handlers();

  // handle -XX:+ShowMessageBoxOnError. buf is used to format the message string

  void show_message_box(char* buf, int buflen);

  // generate an error report

  void report(outputStream* st);

  // generate a stack trace

  static void print_stack_trace(outputStream* st, JavaThread* jt,

                                char* buf, int buflen, bool verbose = false);

  // accessor

  const char* message() const    { return _message; }

  const char* detail_msg() const { return _detail_msg; }

  bool should_report_bug(unsigned int id) { return id != oom_error; }

public:

  // Constructor for crashes

  VMError(Thread* thread, unsigned int sig, address pc, void* siginfo,

          void* context);

  // Constructor for VM internal errors

  VMError(Thread* thread, const char* filename, int lineno,

          const char* message, const char * detail_msg);

  // Constructor for VM OOM errors

  VMError(Thread* thread, const char* filename, int lineno, size_t size,

          const char* message);

  // Constructor for non-fatal errors

  VMError(const char* message);

  // return a string to describe the error

  char *error_string(char* buf, int buflen);

  // main error reporting function

  void report_and_die();

  // reporting OutOfMemoryError

  void report_java_out_of_memory();

  // returns original flags for signal, if it was resetted, or -1 if

  // signal was not changed by error reporter

  static int get_resetted_sigflags(int sig);

  // returns original handler for signal, if it was resetted, or NULL if

  // signal was not changed by error reporter

  static address get_resetted_sighandler(int sig);

  // check to see if fatal error reporting is in progress

  static bool fatal_error_in_progress() { return first_error != NULL; }

};

#endif // SHARE_VM_UTILITIES_VMERROR_HPP