1 /* 2 * Copyright (c) 2003, 2018, 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 frame; 32 class VM_ReportJavaOutOfMemory; 33 34 class VMError : public AllStatic { 35 friend class VM_ReportJavaOutOfMemory; 36 friend class Decoder; 37 friend class VMStructs; 38 39 static int _id; // Solaris/Linux signals: 0 - SIGRTMAX 40 // Windows exceptions: 0xCxxxxxxx system errors 41 // 0x8xxxxxxx system warnings 42 43 static const char* _message; 44 static char _detail_msg[1024]; 45 46 static Thread* _thread; // NULL if it's native thread 47 48 // additional info for crashes 49 static address _pc; // faulting PC 50 static void* _siginfo; // ExceptionRecord on Windows, 51 // siginfo_t on Solaris/Linux 52 static void* _context; // ContextRecord on Windows, 53 // ucontext_t on Solaris/Linux 54 55 // additional info for VM internal errors 56 static const char* _filename; 57 static int _lineno; 58 59 // used by reporting about OOM 60 static size_t _size; 61 62 // used by fatal error handler 63 static int _current_step; 64 static const char* _current_step_info; 65 66 // Thread id of the first error. We must be able to handle native thread, 67 // so use thread id instead of Thread* to identify thread. 68 static volatile intptr_t first_error_tid; 69 70 // Core dump status, false if we have been unable to write a core/minidump for some reason 71 static bool coredump_status; 72 73 // When coredump_status is set to true this will contain the name/path to the core/minidump, 74 // if coredump_status if false, this will (hopefully) contain a useful error explaining why 75 // no core/minidump has been written to disk 76 static char coredump_message[O_BUFLEN]; 77 78 // Timeout handling: 79 // Timestamp at which error reporting started; -1 if no error reporting in progress. 80 static volatile jlong _reporting_start_time; 81 // Whether or not error reporting did timeout. 82 static volatile bool _reporting_did_timeout; 83 // Timestamp at which the last error reporting step started; -1 if no error reporting 84 // in progress. 85 static volatile jlong _step_start_time; 86 // Whether or not the last error reporting step did timeout. 87 static volatile bool _step_did_timeout; 88 89 static bool _error_reported; 90 91 public: 92 93 // set signal handlers on Solaris/Linux or the default exception filter 94 // on Windows, to handle recursive crashes. 95 static void reset_signal_handlers(); 96 97 // handle -XX:+ShowMessageBoxOnError. buf is used to format the message string 98 static void show_message_box(char* buf, int buflen); 99 100 // generate an error report 101 static void report(outputStream* st, bool verbose); 102 103 // generate a stack trace 104 static void print_stack_trace(outputStream* st, JavaThread* jt, 105 char* buf, int buflen, bool verbose = false); 106 107 // public for use by the internal non-product debugger. 108 NOT_PRODUCT(public:) 109 static void print_native_stack(outputStream* st, frame fr, Thread* t, 110 char* buf, int buf_size); 111 NOT_PRODUCT(private:) 112 should_report_bug(unsigned int id)113 static bool should_report_bug(unsigned int id) { 114 return (id != OOM_MALLOC_ERROR) && (id != OOM_MMAP_ERROR); 115 } 116 117 // Write a hint to the stream in case siginfo relates to a segv/bus error 118 // and the offending address points into CDS store. 119 static void check_failing_cds_access(outputStream* st, const void* siginfo); 120 121 static void report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, 122 void* context, const char* detail_fmt, ...) ATTRIBUTE_PRINTF(6, 7); 123 static void report_and_die(const char* message, const char* detail_fmt, ...) ATTRIBUTE_PRINTF(2, 3); 124 125 static fdStream out; 126 static fdStream log; // error log used by VMError::report_and_die() 127 128 // Timeout handling. 129 // Hook functions for platform dependend functionality: 130 static void reporting_started(); 131 static void interrupt_reporting_thread(); 132 133 // Helper function to get the current timestamp. 134 static jlong get_current_timestamp(); 135 136 // Accessors to get/set the start times for step and total timeout. 137 static void record_reporting_start_time(); 138 static jlong get_reporting_start_time(); 139 static void record_step_start_time(); 140 static jlong get_step_start_time(); 141 142 public: 143 144 // return a string to describe the error 145 static char* error_string(char* buf, int buflen); 146 147 // Record status of core/minidump 148 static void record_coredump_status(const char* message, bool status); 149 150 // support for VM.info diagnostic command 151 static void print_vm_info(outputStream* st); 152 153 // main error reporting function 154 static void report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args, 155 Thread* thread, address pc, void* siginfo, void* context, 156 const char* filename, int lineno, size_t size) ATTRIBUTE_PRINTF(3, 0); 157 158 static void report_and_die(Thread* thread, unsigned int sig, address pc, 159 void* siginfo, void* context); 160 161 static void report_and_die(Thread* thread, void* context, const char* filename, int lineno, const char* message, 162 const char* detail_fmt, va_list detail_args) ATTRIBUTE_PRINTF(6, 0); 163 164 static void report_and_die(Thread* thread, const char* filename, int lineno, size_t size, 165 VMErrorType vm_err_type, const char* detail_fmt, 166 va_list detail_args) ATTRIBUTE_PRINTF(6, 0); 167 168 static void report_and_die(const char* message); 169 170 // reporting OutOfMemoryError 171 static void report_java_out_of_memory(const char* message); 172 173 // returns original flags for signal, if it was resetted, or -1 if 174 // signal was not changed by error reporter 175 static int get_resetted_sigflags(int sig); 176 177 // returns original handler for signal, if it was resetted, or NULL if 178 // signal was not changed by error reporter 179 static address get_resetted_sighandler(int sig); 180 181 // check to see if fatal error reporting is in progress fatal_error_in_progress()182 static bool fatal_error_in_progress() { return first_error_tid != -1; } 183 get_first_error_tid()184 static intptr_t get_first_error_tid() { return first_error_tid; } 185 186 // Called by the WatcherThread to check if error reporting has timed-out. 187 // Returns true if error reporting has not completed within the ErrorLogTimeout limit. 188 static bool check_timeout(); 189 190 // Support for avoiding multiple asserts 191 static bool is_error_reported(); 192 193 // Test vmassert(), fatal(), guarantee(), etc. 194 NOT_PRODUCT(static void test_error_handler();) 195 NOT_PRODUCT(static void controlled_crash(int how);) 196 197 // returns an address which is guaranteed to generate a SIGSEGV on read, 198 // for test purposes, which is not NULL and contains bits in every word 199 static void* get_segfault_address(); 200 }; 201 #endif // SHARE_VM_UTILITIES_VMERROR_HPP 202