1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 
  26 class VM_ReportJavaOutOfMemory;
  27 
  28 class VMError : public StackObj {
  29   friend class VM_ReportJavaOutOfMemory;
  30 
  31   enum ErrorType {
  32     internal_error = 0xe0000000,
  33     oom_error      = 0xe0000001
  34   };
  35   int          _id;          // Solaris/Linux signals: 0 - SIGRTMAX
  36                              // Windows exceptions: 0xCxxxxxxx system errors
  37                              //                     0x8xxxxxxx system warnings
  38 
  39   const char * _message;
  40   const char * _detail_msg;
  41 
  42   Thread *     _thread;      // NULL if it's native thread
  43 
  44 
  45   // additional info for crashes
  46   address      _pc;          // faulting PC
  47   void *       _siginfo;     // ExceptionRecord on Windows,
  48                              // siginfo_t on Solaris/Linux
  49   void *       _context;     // ContextRecord on Windows,
  50                              // ucontext_t on Solaris/Linux
  51 
  52   // additional info for VM internal errors
  53   const char * _filename;
  54   int          _lineno;
  55 
  56   // used by fatal error handler
  57   int          _current_step;
  58   const char * _current_step_info;
  59   int          _verbose;
  60   // First error, and its thread id. We must be able to handle native thread,
  61   // so use thread id instead of Thread* to identify thread.
  62   static VMError* volatile first_error;
  63   static volatile jlong    first_error_tid;
  64 
  65   // used by reporting about OOM
  66   size_t       _size;
  67 
  68   // set signal handlers on Solaris/Linux or the default exception filter
  69   // on Windows, to handle recursive crashes.
  70   void reset_signal_handlers();
  71 
  72   // handle -XX:+ShowMessageBoxOnError. buf is used to format the message string
  73   void show_message_box(char* buf, int buflen);
  74 
  75   // generate an error report
  76   void report(outputStream* st);
  77 
  78   // generate a stack trace
  79   static void print_stack_trace(outputStream* st, JavaThread* jt,
  80                                 char* buf, int buflen, bool verbose = false);
  81 
  82   // accessor
  83   const char* message() const    { return _message; }
  84   const char* detail_msg() const { return _detail_msg; }
  85 
  86 public:
  87   // Constructor for crashes
  88   VMError(Thread* thread, int sig, address pc, void* siginfo, void* context);
  89   // Constructor for VM internal errors
  90   VMError(Thread* thread, const char* filename, int lineno,
  91           const char* message, const char * detail_msg);
  92 
  93   // Constructor for VM OOM errors
  94   VMError(Thread* thread, const char* filename, int lineno, size_t size,
  95           const char* message);
  96   // Constructor for non-fatal errors
  97   VMError(const char* message);
  98 
  99   // return a string to describe the error
 100   char *error_string(char* buf, int buflen);
 101 
 102   // main error reporting function
 103   void report_and_die();
 104 
 105   // reporting OutOfMemoryError
 106   void report_java_out_of_memory();
 107 
 108   // returns original flags for signal, if it was resetted, or -1 if
 109   // signal was not changed by error reporter
 110   static int get_resetted_sigflags(int sig);
 111 
 112   // returns original handler for signal, if it was resetted, or NULL if
 113   // signal was not changed by error reporter
 114   static address get_resetted_sighandler(int sig);
 115 
 116   // check to see if fatal error reporting is in progress
 117   static bool fatal_error_in_progress() { return first_error != NULL; }
 118 };