1 /* 2 * Copyright (c) 2003, 2017, 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 #ifndef SHARE_VM_UTILITIES_VMERROR_HPP 26 #define SHARE_VM_UTILITIES_VMERROR_HPP 27 28 #include "utilities/globalDefinitions.hpp" 29 30 class Decoder; 31 class VM_ReportJavaOutOfMemory; 32 33 class VMError : public AllStatic { 34 friend class VM_ReportJavaOutOfMemory; 35 friend class Decoder; 36 friend class VMStructs; 37 38 static int _id; // Solaris/Linux signals: 0 - SIGRTMAX 39 // Windows exceptions: 0xCxxxxxxx system errors 40 // 0x8xxxxxxx system warnings 41 42 static const char* _message; 43 static char _detail_msg[1024]; 44 45 static Thread* _thread; // NULL if it's native thread 46 47 // additional info for crashes 48 static address _pc; // faulting PC 49 static void* _siginfo; // ExceptionRecord on Windows, 50 // siginfo_t on Solaris/Linux 51 static void* _context; // ContextRecord on Windows, 52 // ucontext_t on Solaris/Linux 53 54 // additional info for VM internal errors 55 static const char* _filename; 56 static int _lineno; 57 58 // used by reporting about OOM 59 static size_t _size; 60 61 // used by fatal error handler 62 static int _current_step; 63 static const char* _current_step_info; 64 65 // Thread id of the first error. We must be able to handle native thread, 66 // so use thread id instead of Thread* to identify thread. 67 static volatile intptr_t first_error_tid; 68 69 // Core dump status, false if we have been unable to write a core/minidump for some reason 70 static bool coredump_status; 71 72 // When coredump_status is set to true this will contain the name/path to the core/minidump, 73 // if coredump_status if false, this will (hopefully) contain a useful error explaining why 74 // no core/minidump has been written to disk 75 static char coredump_message[O_BUFLEN]; 76 77 // Timeout handling: 78 // Timestamp at which error reporting started; -1 if no error reporting in progress. 79 static volatile jlong _reporting_start_time; 80 // Whether or not error reporting did timeout. 81 static volatile bool _reporting_did_timeout; 82 // Timestamp at which the last error reporting step started; -1 if no error reporting 83 // in progress. 84 static volatile jlong _step_start_time; 85 // Whether or not the last error reporting step did timeout. 86 static volatile bool _step_did_timeout; 87 88 // set signal handlers on Solaris/Linux or the default exception filter 89 // on Windows, to handle recursive crashes. 90 static void reset_signal_handlers(); 91 92 // handle -XX:+ShowMessageBoxOnError. buf is used to format the message string 93 static void show_message_box(char* buf, int buflen); 94 95 // generate an error report 96 static void report(outputStream* st, bool verbose); 97 98 // generate a stack trace 99 static void print_stack_trace(outputStream* st, JavaThread* jt, 100 char* buf, int buflen, bool verbose = false); 101 102 static bool should_report_bug(unsigned int id) { 103 return (id != OOM_MALLOC_ERROR) && (id != OOM_MMAP_ERROR); 104 } 105 106 // Write a hint to the stream in case siginfo relates to a segv/bus error 107 // and the offending address points into CDS store. 108 static void check_failing_cds_access(outputStream* st, const void* siginfo); 109 110 static void report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, 111 void* context, const char* detail_fmt, ...) ATTRIBUTE_PRINTF(6, 7); 112 static void report_and_die(const char* message, const char* detail_fmt, ...) ATTRIBUTE_PRINTF(2, 3); 113 114 static fdStream out; 115 static fdStream log; // error log used by VMError::report_and_die() 116 117 // Timeout handling. 118 // Hook functions for platform dependend functionality: 119 static void reporting_started(); 120 static void interrupt_reporting_thread(); 121 122 // Helper function to get the current timestamp. 123 static jlong get_current_timestamp(); 124 125 // Accessors to get/set the start times for step and total timeout. 126 static void record_reporting_start_time(); 127 static jlong get_reporting_start_time(); 128 static void record_step_start_time(); 129 static jlong get_step_start_time(); 130 131 public: 132 133 // return a string to describe the error 134 static char* error_string(char* buf, int buflen); 135 136 // Record status of core/minidump 137 static void record_coredump_status(const char* message, bool status); 138 139 // support for VM.info diagnostic command 140 static void print_vm_info(outputStream* st); 141 142 // main error reporting function 143 static void report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args, 144 Thread* thread, address pc, void* siginfo, void* context, 145 const char* filename, int lineno, size_t size) ATTRIBUTE_PRINTF(3, 0); 146 147 static void report_and_die(Thread* thread, unsigned int sig, address pc, 148 void* siginfo, void* context); 149 150 static void report_and_die(Thread* thread,const char* filename, int lineno, const char* message, 151 const char* detail_fmt, va_list detail_args) ATTRIBUTE_PRINTF(5, 0); 152 153 static void report_and_die(Thread* thread, const char* filename, int lineno, size_t size, 154 VMErrorType vm_err_type, const char* detail_fmt, 155 va_list detail_args) ATTRIBUTE_PRINTF(6, 0); 156 157 static void report_and_die(const char* message); 158 159 // reporting OutOfMemoryError 160 static void report_java_out_of_memory(const char* message); 161 162 // returns original flags for signal, if it was resetted, or -1 if 163 // signal was not changed by error reporter 164 static int get_resetted_sigflags(int sig); 165 166 // returns original handler for signal, if it was resetted, or NULL if 167 // signal was not changed by error reporter 168 static address get_resetted_sighandler(int sig); 169 170 // check to see if fatal error reporting is in progress 171 static bool fatal_error_in_progress() { return first_error_tid != -1; } 172 173 static intptr_t get_first_error_tid() { return first_error_tid; } 174 175 // Called by the WatcherThread to check if error reporting has timed-out. 176 // Returns true if error reporting has not completed within the ErrorLogTimeout limit. 177 static bool check_timeout(); 178 179 }; 180 181 #endif // SHARE_VM_UTILITIES_VMERROR_HPP