1 /*
   2  * Copyright 2003-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 # include "incls/_precompiled.incl"
  26 # include "incls/_vmError.cpp.incl"
  27 
  28 // List of environment variables that should be reported in error log file.
  29 const char *env_list[] = {
  30   // All platforms
  31   "JAVA_HOME", "JRE_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
  32   "JAVA_COMPILER", "PATH", "USERNAME",
  33 
  34   // Env variables that are defined on Solaris/Linux
  35   "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
  36   "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
  37 
  38   // defined on Linux
  39   "LD_ASSUME_KERNEL", "_JAVA_SR_SIGNUM",
  40 
  41   // defined on Windows
  42   "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR",
  43 
  44   (const char *)0
  45 };
  46 
  47 // Fatal error handler for internal errors and crashes.
  48 //
  49 // The default behavior of fatal error handler is to print a brief message
  50 // to standard out (defaultStream::output_fd()), then save detailed information
  51 // into an error report file (hs_err_pid<pid>.log) and abort VM. If multiple
  52 // threads are having troubles at the same time, only one error is reported.
  53 // The thread that is reporting error will abort VM when it is done, all other
  54 // threads are blocked forever inside report_and_die().
  55 
  56 // Constructor for crashes
  57 VMError::VMError(Thread* thread, int sig, address pc, void* siginfo, void* context) {
  58     _thread = thread;
  59     _id = sig;
  60     _pc   = pc;
  61     _siginfo = siginfo;
  62     _context = context;
  63 
  64     _verbose = false;
  65     _current_step = 0;
  66     _current_step_info = NULL;
  67 
  68     _message = "";
  69     _filename = NULL;
  70     _lineno = 0;
  71 
  72     _size = 0;
  73 }
  74 
  75 // Constructor for internal errors
  76 VMError::VMError(Thread* thread, const char* message, const char* filename, int lineno) {
  77     _thread = thread;
  78     _id = internal_error;     // set it to a value that's not an OS exception/signal
  79     _filename = filename;
  80     _lineno = lineno;
  81     _message = message;
  82 
  83     _verbose = false;
  84     _current_step = 0;
  85     _current_step_info = NULL;
  86 
  87     _pc = NULL;
  88     _siginfo = NULL;
  89     _context = NULL;
  90 
  91     _size = 0;
  92 }
  93 
  94 // Constructor for OOM errors
  95 VMError::VMError(Thread* thread, size_t size, const char* message, const char* filename, int lineno) {
  96     _thread = thread;
  97     _id = oom_error;     // set it to a value that's not an OS exception/signal
  98     _filename = filename;
  99     _lineno = lineno;
 100     _message = message;
 101 
 102     _verbose = false;
 103     _current_step = 0;
 104     _current_step_info = NULL;
 105 
 106     _pc = NULL;
 107     _siginfo = NULL;
 108     _context = NULL;
 109 
 110     _size = size;
 111 }
 112 
 113 
 114 // Constructor for non-fatal errors
 115 VMError::VMError(const char* message) {
 116     _thread = NULL;
 117     _id = internal_error;     // set it to a value that's not an OS exception/signal
 118     _filename = NULL;
 119     _lineno = 0;
 120     _message = message;
 121 
 122     _verbose = false;
 123     _current_step = 0;
 124     _current_step_info = NULL;
 125 
 126     _pc = NULL;
 127     _siginfo = NULL;
 128     _context = NULL;
 129 
 130     _size = 0;
 131 }
 132 
 133 // -XX:OnError=<string>, where <string> can be a list of commands, separated
 134 // by ';'. "%p" is replaced by current process id (pid); "%%" is replaced by
 135 // a single "%". Some examples:
 136 //
 137 // -XX:OnError="pmap %p"                // show memory map
 138 // -XX:OnError="gcore %p; dbx - %p"     // dump core and launch debugger
 139 // -XX:OnError="cat hs_err_pid%p.log | mail my_email@sun.com"
 140 // -XX:OnError="kill -9 %p"             // ?#!@#
 141 
 142 // A simple parser for -XX:OnError, usage:
 143 //  ptr = OnError;
 144 //  while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != NULL)
 145 //     ... ...
 146 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
 147   if (ptr == NULL || *ptr == NULL) return NULL;
 148 
 149   const char* cmd = *ptr;
 150 
 151   // skip leading blanks or ';'
 152   while (*cmd == ' ' || *cmd == ';') cmd++;
 153 
 154   if (*cmd == '\0') return NULL;
 155 
 156   const char * cmdend = cmd;
 157   while (*cmdend != '\0' && *cmdend != ';') cmdend++;
 158 
 159   Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
 160 
 161   *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
 162   return buf;
 163 }
 164 
 165 
 166 static void print_bug_submit_message(outputStream *out, Thread *thread) {
 167   if (out == NULL) return;
 168   out->print_raw_cr("# If you would like to submit a bug report, please visit:");
 169   out->print_raw   ("#   ");
 170   out->print_raw_cr(Arguments::java_vendor_url_bug());
 171   // If the crash is in native code, encourage user to submit a bug to the
 172   // provider of that code.
 173   if (thread && thread->is_Java_thread() &&
 174       !thread->is_hidden_from_external_view()) {
 175     JavaThread* jt = (JavaThread*)thread;
 176     if (jt->thread_state() == _thread_in_native) {
 177       out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
 178     }
 179   }
 180   out->print_raw_cr("#");
 181 }
 182 
 183 
 184 // Return a string to describe the error
 185 char* VMError::error_string(char* buf, int buflen) {
 186   char signame_buf[64];
 187   const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
 188 
 189   if (signame) {
 190     jio_snprintf(buf, buflen,
 191                  "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
 192                  signame, _id, _pc,
 193                  os::current_process_id(), os::current_thread_id());
 194   } else {
 195     if (_filename != NULL && _lineno > 0) {
 196       // skip directory names
 197       char separator = os::file_separator()[0];
 198       const char *p = strrchr(_filename, separator);
 199 
 200       jio_snprintf(buf, buflen,
 201         "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT " \nError: %s",
 202         p ? p + 1 : _filename, _lineno,
 203         os::current_process_id(), os::current_thread_id(),
 204         _message ? _message : "");
 205     } else {
 206       jio_snprintf(buf, buflen,
 207         "Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
 208         _id, os::current_process_id(), os::current_thread_id());
 209     }
 210   }
 211 
 212   return buf;
 213 }
 214 













































 215 
 216 // This is the main function to report a fatal error. Only one thread can
 217 // call this function, so we don't need to worry about MT-safety. But it's
 218 // possible that the error handler itself may crash or die on an internal
 219 // error, for example, when the stack/heap is badly damaged. We must be
 220 // able to handle recursive errors that happen inside error handler.
 221 //
 222 // Error reporting is done in several steps. If a crash or internal error
 223 // occurred when reporting an error, the nested signal/exception handler
 224 // can skip steps that are already (or partially) done. Error reporting will
 225 // continue from the next step. This allows us to retrieve and print
 226 // information that may be unsafe to get after a fatal error. If it happens,
 227 // you may find nested report_and_die() frames when you look at the stack
 228 // in a debugger.
 229 //
 230 // In general, a hang in error handler is much worse than a crash or internal
 231 // error, as it's harder to recover from a hang. Deadlock can happen if we
 232 // try to grab a lock that is already owned by current thread, or if the
 233 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
 234 // error handler and all the functions it called should avoid grabbing any
 235 // lock. An important thing to notice is that memory allocation needs a lock.
 236 //
 237 // We should avoid using large stack allocated buffers. Many errors happen
 238 // when stack space is already low. Making things even worse is that there
 239 // could be nested report_and_die() calls on stack (see above). Only one
 240 // thread can report error, so large buffers are statically allocated in data
 241 // segment.
 242 
 243 void VMError::report(outputStream* st) {
 244 # define BEGIN if (_current_step == 0) { _current_step = 1;
 245 # define STEP(n, s) } if (_current_step < n) { _current_step = n; _current_step_info = s;
 246 # define END }
 247 
 248   // don't allocate large buffer on stack
 249   static char buf[O_BUFLEN];
 250 
 251   BEGIN
 252 
 253   STEP(10, "(printing fatal error message)")
 254 
 255      st->print_cr("#");
 256      st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
 257 
 258   STEP(15, "(printing type of error)")
 259 
 260      switch(_id) {
 261        case oom_error:
 262          st->print_cr("#");
 263          st->print("# java.lang.OutOfMemoryError: ");
 264          if (_size) {
 265            st->print("requested ");
 266            sprintf(buf,SIZE_FORMAT,_size);
 267            st->print(buf);
 268            st->print(" bytes");
 269            if (_message != NULL) {
 270              st->print(" for ");
 271              st->print(_message);
 272            }
 273            st->print_cr(". Out of swap space?");
 274          } else {
 275            if (_message != NULL)
 276              st->print_cr(_message);
 277          }
 278          break;
 279        case internal_error:
 280        default:
 281          break;
 282      }
 283 
 284   STEP(20, "(printing exception/signal name)")
 285 
 286      st->print_cr("#");
 287      st->print("#  ");
 288      // Is it an OS exception/signal?
 289      if (os::exception_name(_id, buf, sizeof(buf))) {
 290        st->print("%s", buf);
 291        st->print(" (0x%x)", _id);                // signal number
 292        st->print(" at pc=" PTR_FORMAT, _pc);
 293      } else {
 294        st->print("Internal Error");
 295        if (_filename != NULL && _lineno > 0) {
 296 #ifdef PRODUCT
 297          // In product mode chop off pathname?
 298          char separator = os::file_separator()[0];
 299          const char *p = strrchr(_filename, separator);
 300          const char *file = p ? p+1 : _filename;
 301 #else
 302          const char *file = _filename;
 303 #endif
 304          size_t len = strlen(file);
 305          size_t buflen = sizeof(buf);
 306 
 307          strncpy(buf, file, buflen);
 308          if (len + 10 < buflen) {
 309            sprintf(buf + len, ":%d", _lineno);
 310          }
 311          st->print(" (%s)", buf);
 312        } else {
 313          st->print(" (0x%x)", _id);
 314        }
 315      }
 316 
 317   STEP(30, "(printing current thread and pid)")
 318 
 319      // process id, thread id
 320      st->print(", pid=%d", os::current_process_id());
 321      st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
 322      st->cr();
 323 
 324   STEP(40, "(printing error message)")
 325 
 326      // error message
 327      if (_message && _message[0] != '\0') {
 328        st->print_cr("#  Error: %s", _message);
 329      }
 330 
 331   STEP(50, "(printing Java version string)")
 332 
 333      // VM version
 334      st->print_cr("#");
 335      JDK_Version::current().to_string(buf, sizeof(buf));
 336      st->print_cr("# JRE version: %s", buf);
 337      st->print_cr("# Java VM: %s (%s %s %s %s)",
 338                    Abstract_VM_Version::vm_name(),
 339                    Abstract_VM_Version::vm_release(),
 340                    Abstract_VM_Version::vm_info_string(),
 341                    Abstract_VM_Version::vm_platform_string(),
 342                    UseCompressedOops ? "compressed oops" : ""
 343                  );
 344 
 345   STEP(60, "(printing problematic frame)")
 346 
 347      // Print current frame if we have a context (i.e. it's a crash)
 348      if (_context) {
 349        st->print_cr("# Problematic frame:");
 350        st->print("# ");
 351        frame fr = os::fetch_frame_from_context(_context);
 352        fr.print_on_error(st, buf, sizeof(buf));
 353        st->cr();
 354        st->print_cr("#");
 355      }
 356 
 357   STEP(65, "(printing bug submit message)")
 358 
 359      if (_verbose) print_bug_submit_message(st, _thread);
 360 
 361   STEP(70, "(printing thread)" )
 362 
 363      if (_verbose) {
 364        st->cr();
 365        st->print_cr("---------------  T H R E A D  ---------------");
 366        st->cr();
 367      }
 368 
 369   STEP(80, "(printing current thread)" )
 370 
 371      // current thread
 372      if (_verbose) {
 373        if (_thread) {
 374          st->print("Current thread (" PTR_FORMAT "):  ", _thread);
 375          _thread->print_on_error(st, buf, sizeof(buf));
 376          st->cr();
 377        } else {
 378          st->print_cr("Current thread is native thread");
 379        }
 380        st->cr();
 381      }
 382 
 383   STEP(90, "(printing siginfo)" )
 384 
 385      // signal no, signal code, address that caused the fault
 386      if (_verbose && _siginfo) {
 387        os::print_siginfo(st, _siginfo);
 388        st->cr();
 389      }
 390 
 391   STEP(100, "(printing registers, top of stack, instructions near pc)")
 392 
 393      // registers, top of stack, instructions near pc
 394      if (_verbose && _context) {
 395        os::print_context(st, _context);
 396        st->cr();
 397      }
 398 
 399   STEP(110, "(printing stack bounds)" )
 400 
 401      if (_verbose) {
 402        st->print("Stack: ");
 403 
 404        address stack_top;
 405        size_t stack_size;
 406 
 407        if (_thread) {
 408           stack_top = _thread->stack_base();
 409           stack_size = _thread->stack_size();
 410        } else {
 411           stack_top = os::current_stack_base();
 412           stack_size = os::current_stack_size();
 413        }
 414 
 415        address stack_bottom = stack_top - stack_size;
 416        st->print("[" PTR_FORMAT "," PTR_FORMAT "]", stack_bottom, stack_top);
 417 
 418        frame fr = _context ? os::fetch_frame_from_context(_context)
 419                            : os::current_frame();
 420 
 421        if (fr.sp()) {
 422          st->print(",  sp=" PTR_FORMAT, fr.sp());
 423          st->print(",  free space=%" INTPTR_FORMAT "k",
 424                      ((intptr_t)fr.sp() - (intptr_t)stack_bottom) >> 10);
 425        }
 426 
 427        st->cr();
 428      }
 429 
 430   STEP(120, "(printing native stack)" )
 431 
 432      if (_verbose) {
 433        frame fr = _context ? os::fetch_frame_from_context(_context)
 434                            : os::current_frame();
 435 
 436        // see if it's a valid frame
 437        if (fr.pc()) {
 438           st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
 439 
 440           int count = 0;
 441 
 442           while (count++ < StackPrintLimit) {
 443              fr.print_on_error(st, buf, sizeof(buf));
 444              st->cr();
 445              if (os::is_first_C_frame(&fr)) break;
 446              fr = os::get_sender_for_C_frame(&fr);
 447           }
 448 
 449           if (count > StackPrintLimit) {
 450              st->print_cr("...<more frames>...");
 451           }
 452 
 453           st->cr();
 454        }
 455      }
 456 
 457   STEP(130, "(printing Java stack)" )
 458 
 459      if (_verbose && _thread && _thread->is_Java_thread()) {
 460        JavaThread* jt = (JavaThread*)_thread;
 461 #ifdef ZERO
 462        if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
 463          // StackFrameStream uses the frame anchor, which may not have
 464          // been set up.  This can be done at any time in Zero, however,
 465          // so if it hasn't been set up then we just set it up now and
 466          // clear it again when we're done.
 467          bool has_last_Java_frame = jt->has_last_Java_frame();
 468          if (!has_last_Java_frame)
 469            jt->set_last_Java_frame();
 470          st->print("Java frames:");
 471 
 472          // If the top frame is a Shark frame and the frame anchor isn't
 473          // set up then it's possible that the information in the frame
 474          // is garbage: it could be from a previous decache, or it could
 475          // simply have never been written.  So we print a warning...
 476          StackFrameStream sfs(jt);
 477          if (!has_last_Java_frame && !sfs.is_done()) {
 478            if (sfs.current()->zeroframe()->is_shark_frame()) {
 479              st->print(" (TOP FRAME MAY BE JUNK)");
 480            }
 481          }
 482          st->cr();
 483 
 484          // Print the frames
 485          for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
 486            sfs.current()->zero_print_on_error(i, st, buf, sizeof(buf));
 487            st->cr();
 488          }
 489 
 490          // Reset the frame anchor if necessary
 491          if (!has_last_Java_frame)
 492            jt->reset_last_Java_frame();
 493        }
 494 #else
 495        if (jt->has_last_Java_frame()) {
 496          st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
 497          for(StackFrameStream sfs(jt); !sfs.is_done(); sfs.next()) {
 498            sfs.current()->print_on_error(st, buf, sizeof(buf));
 499            st->cr();
 500          }
 501        }
 502 #endif // ZERO
 503      }
 504 
 505   STEP(135, "(printing target Java thread stack)" )
 506 
 507      // printing Java thread stack trace if it is involved in GC crash
 508      if (_verbose && (_thread->is_Named_thread())) {
 509        JavaThread*  jt = ((NamedThread *)_thread)->processed_thread();
 510        if (jt != NULL) {
 511          st->print_cr("JavaThread " PTR_FORMAT " (nid = " UINTX_FORMAT ") was being processed", jt, jt->osthread()->thread_id());
 512          if (jt->has_last_Java_frame()) {
 513            st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
 514            for(StackFrameStream sfs(jt); !sfs.is_done(); sfs.next()) {
 515              sfs.current()->print_on_error(st, buf, sizeof(buf), true);
 516              st->cr();
 517            }
 518          }
 519        }
 520      }
 521 
 522   STEP(140, "(printing VM operation)" )
 523 
 524      if (_verbose && _thread && _thread->is_VM_thread()) {
 525         VMThread* t = (VMThread*)_thread;
 526         VM_Operation* op = t->vm_operation();
 527         if (op) {
 528           op->print_on_error(st);
 529           st->cr();
 530           st->cr();
 531         }
 532      }
 533 
 534   STEP(150, "(printing current compile task)" )
 535 
 536      if (_verbose && _thread && _thread->is_Compiler_thread()) {
 537         CompilerThread* t = (CompilerThread*)_thread;
 538         if (t->task()) {
 539            st->cr();
 540            st->print_cr("Current CompileTask:");
 541            t->task()->print_line_on_error(st, buf, sizeof(buf));
 542            st->cr();
 543         }
 544      }
 545 
 546   STEP(160, "(printing process)" )
 547 
 548      if (_verbose) {
 549        st->cr();
 550        st->print_cr("---------------  P R O C E S S  ---------------");
 551        st->cr();
 552      }
 553 
 554   STEP(170, "(printing all threads)" )
 555 
 556      // all threads
 557      if (_verbose && _thread) {
 558        Threads::print_on_error(st, _thread, buf, sizeof(buf));
 559        st->cr();
 560      }
 561 
 562   STEP(175, "(printing VM state)" )
 563 
 564      if (_verbose) {
 565        // Safepoint state
 566        st->print("VM state:");
 567 
 568        if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
 569        else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
 570        else st->print("not at safepoint");
 571 
 572        // Also see if error occurred during initialization or shutdown
 573        if (!Universe::is_fully_initialized()) {
 574          st->print(" (not fully initialized)");
 575        } else if (VM_Exit::vm_exited()) {
 576          st->print(" (shutting down)");
 577        } else {
 578          st->print(" (normal execution)");
 579        }
 580        st->cr();
 581        st->cr();
 582      }
 583 
 584   STEP(180, "(printing owned locks on error)" )
 585 
 586      // mutexes/monitors that currently have an owner
 587      if (_verbose) {
 588        print_owned_locks_on_error(st);
 589        st->cr();
 590      }
 591 
 592   STEP(190, "(printing heap information)" )
 593 
 594      if (_verbose && Universe::is_fully_initialized()) {
 595        // print heap information before vm abort
 596        Universe::print_on(st);
 597        st->cr();
 598      }
 599 
 600   STEP(200, "(printing dynamic libraries)" )
 601 
 602      if (_verbose) {
 603        // dynamic libraries, or memory map
 604        os::print_dll_info(st);
 605        st->cr();
 606      }
 607 
 608   STEP(210, "(printing VM options)" )
 609 
 610      if (_verbose) {
 611        // VM options
 612        Arguments::print_on(st);
 613        st->cr();
 614      }
 615 
 616   STEP(220, "(printing environment variables)" )
 617 
 618      if (_verbose) {
 619        os::print_environment_variables(st, env_list, buf, sizeof(buf));
 620        st->cr();
 621      }
 622 
 623   STEP(225, "(printing signal handlers)" )
 624 
 625      if (_verbose) {
 626        os::print_signal_handlers(st, buf, sizeof(buf));
 627        st->cr();
 628      }
 629 
 630   STEP(230, "" )
 631 
 632      if (_verbose) {
 633        st->cr();
 634        st->print_cr("---------------  S Y S T E M  ---------------");
 635        st->cr();
 636      }
 637 
 638   STEP(240, "(printing OS information)" )
 639 
 640      if (_verbose) {
 641        os::print_os_info(st);
 642        st->cr();
 643      }
 644 
 645   STEP(250, "(printing CPU info)" )
 646      if (_verbose) {
 647        os::print_cpu_info(st);
 648        st->cr();
 649      }
 650 
 651   STEP(260, "(printing memory info)" )
 652 
 653      if (_verbose) {
 654        os::print_memory_info(st);
 655        st->cr();
 656      }
 657 
 658   STEP(270, "(printing internal vm info)" )
 659 
 660      if (_verbose) {
 661        st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
 662        st->cr();
 663      }
 664 
 665   STEP(280, "(printing date and time)" )
 666 
 667      if (_verbose) {
 668        os::print_date_and_time(st);
 669        st->cr();
 670      }
 671 
 672   END
 673 
 674 # undef BEGIN
 675 # undef STEP
 676 # undef END
 677 }
 678 
 679 
 680 void VMError::report_and_die() {
 681   // Don't allocate large buffer on stack
 682   static char buffer[O_BUFLEN];
 683 
 684   // First error, and its thread id. We must be able to handle native thread,
 685   // so use thread id instead of Thread* to identify thread.
 686   static VMError* first_error;
 687   static jlong    first_error_tid;
 688 
 689   // An error could happen before tty is initialized or after it has been
 690   // destroyed. Here we use a very simple unbuffered fdStream for printing.
 691   // Only out.print_raw() and out.print_raw_cr() should be used, as other
 692   // printing methods need to allocate large buffer on stack. To format a
 693   // string, use jio_snprintf() with a static buffer or use staticBufferStream.
 694   static fdStream out(defaultStream::output_fd());
 695 
 696   // How many errors occurred in error handler when reporting first_error.
 697   static int recursive_error_count;
 698 
 699   // We will first print a brief message to standard out (verbose = false),
 700   // then save detailed information in log file (verbose = true).
 701   static bool out_done = false;         // done printing to standard out
 702   static bool log_done = false;         // done saving error log
 703   static fdStream log;                  // error log
 704 
 705   if (SuppressFatalErrorMessage) {
 706       os::abort();
 707   }
 708   jlong mytid = os::current_thread_id();
 709   if (first_error == NULL &&
 710       Atomic::cmpxchg_ptr(this, &first_error, NULL) == NULL) {
 711 
 712     // first time
 713     first_error_tid = mytid;
 714     set_error_reported();
 715 
 716     if (ShowMessageBoxOnError) {
 717       show_message_box(buffer, sizeof(buffer));
 718 
 719       // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
 720       // WatcherThread can kill JVM if the error handler hangs.
 721       ShowMessageBoxOnError = false;
 722     }
 723 
 724     // reset signal handlers or exception filter; make sure recursive crashes
 725     // are handled properly.
 726     reset_signal_handlers();
 727 
 728   } else {
 729     // If UseOsErrorReporting we call this for each level of the call stack
 730     // while searching for the exception handler.  Only the first level needs
 731     // to be reported.
 732     if (UseOSErrorReporting && log_done) return;
 733 
 734     // This is not the first error, see if it happened in a different thread
 735     // or in the same thread during error reporting.
 736     if (first_error_tid != mytid) {
 737       jio_snprintf(buffer, sizeof(buffer),
 738                    "[thread " INT64_FORMAT " also had an error]",
 739                    mytid);
 740       out.print_raw_cr(buffer);
 741 
 742       // error reporting is not MT-safe, block current thread
 743       os::infinite_sleep();
 744 
 745     } else {
 746       if (recursive_error_count++ > 30) {
 747         out.print_raw_cr("[Too many errors, abort]");
 748         os::die();
 749       }
 750 
 751       jio_snprintf(buffer, sizeof(buffer),
 752                    "[error occurred during error reporting %s, id 0x%x]",
 753                    first_error ? first_error->_current_step_info : "",
 754                    _id);
 755       if (log.is_open()) {
 756         log.cr();
 757         log.print_raw_cr(buffer);
 758         log.cr();
 759       } else {
 760         out.cr();
 761         out.print_raw_cr(buffer);
 762         out.cr();
 763       }
 764     }
 765   }
 766 
 767   // print to screen
 768   if (!out_done) {
 769     first_error->_verbose = false;
 770 
 771     staticBufferStream sbs(buffer, sizeof(buffer), &out);
 772     first_error->report(&sbs);
 773 
 774     out_done = true;
 775 
 776     first_error->_current_step = 0;         // reset current_step
 777     first_error->_current_step_info = "";   // reset current_step string
 778   }
 779 
 780   // print to error log file
 781   if (!log_done) {
 782     first_error->_verbose = true;
 783 
 784     // see if log file is already open
 785     if (!log.is_open()) {
 786       // open log file
 787       int fd = -1;
 788 
 789       if (ErrorFile != NULL) {
 790         bool copy_ok =
 791           Arguments::copy_expand_pid(ErrorFile, strlen(ErrorFile), buffer, sizeof(buffer));
 792         if (copy_ok) {
 793           fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 794         }
 795       }
 796 
 797       if (fd == -1) {
 798         const char *cwd = os::get_current_directory(buffer, sizeof(buffer));
 799         size_t len = strlen(cwd);
 800         // either user didn't specify, or the user's location failed,
 801         // so use the default name in the current directory
 802         jio_snprintf(&buffer[len], sizeof(buffer)-len, "%shs_err_pid%u.log",
 803                      os::file_separator(), os::current_process_id());
 804         fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 805       }
 806 
 807       if (fd == -1) {
 808         // try temp directory
 809         const char * tmpdir = os::get_temp_directory();
 810         jio_snprintf(buffer, sizeof(buffer), "%s%shs_err_pid%u.log",
 811                      tmpdir, os::file_separator(), os::current_process_id());
 812         fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 813       }
 814 
 815       if (fd != -1) {
 816         out.print_raw("# An error report file with more information is saved as:\n# ");
 817         out.print_raw_cr(buffer);
 818         os::set_error_file(buffer);
 819 
 820         log.set_fd(fd);
 821       } else {
 822         out.print_raw_cr("# Can not save log file, dump to screen..");
 823         log.set_fd(defaultStream::output_fd());
 824       }
 825     }
 826 
 827     staticBufferStream sbs(buffer, O_BUFLEN, &log);
 828     first_error->report(&sbs);
 829     first_error->_current_step = 0;         // reset current_step
 830     first_error->_current_step_info = "";   // reset current_step string
 831 
 832     if (log.fd() != defaultStream::output_fd()) {
 833       close(log.fd());
 834     }
 835 
 836     log.set_fd(-1);
 837     log_done = true;
 838   }
 839 
 840 
 841   static bool skip_OnError = false;
 842   if (!skip_OnError && OnError && OnError[0]) {
 843     skip_OnError = true;
 844 
 845     out.print_raw_cr("#");
 846     out.print_raw   ("# -XX:OnError=\"");
 847     out.print_raw   (OnError);
 848     out.print_raw_cr("\"");
 849 
 850     char* cmd;
 851     const char* ptr = OnError;
 852     while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
 853       out.print_raw   ("#   Executing ");
 854 #if defined(LINUX)
 855       out.print_raw   ("/bin/sh -c ");
 856 #elif defined(SOLARIS)
 857       out.print_raw   ("/usr/bin/sh -c ");
 858 #endif
 859       out.print_raw   ("\"");
 860       out.print_raw   (cmd);
 861       out.print_raw_cr("\" ...");
 862 
 863       os::fork_and_exec(cmd);
 864     }
 865 
 866     // done with OnError
 867     OnError = NULL;
 868   }
 869 
 870   static bool skip_bug_url = false;
 871   if (!skip_bug_url) {
 872     skip_bug_url = true;
 873 
 874     out.print_raw_cr("#");
 875     print_bug_submit_message(&out, _thread);
 876   }
 877 
 878   if (!UseOSErrorReporting) {
 879     // os::abort() will call abort hooks, try it first.
 880     static bool skip_os_abort = false;
 881     if (!skip_os_abort) {
 882       skip_os_abort = true;
 883       os::abort();
 884     }
 885 
 886     // if os::abort() doesn't abort, try os::die();
 887     os::die();
 888   }
 889 }
 890 
 891 /*
 892  * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
 893  * ensures utilities such as jmap can observe the process is a consistent state.
 894  */
 895 class VM_ReportJavaOutOfMemory : public VM_Operation {
 896  private:
 897   VMError *_err;
 898  public:
 899   VM_ReportJavaOutOfMemory(VMError *err) { _err = err; }
 900   VMOp_Type type() const                 { return VMOp_ReportJavaOutOfMemory; }
 901   void doit();
 902 };
 903 
 904 void VM_ReportJavaOutOfMemory::doit() {
 905   // Don't allocate large buffer on stack
 906   static char buffer[O_BUFLEN];
 907 
 908   tty->print_cr("#");
 909   tty->print_cr("# java.lang.OutOfMemoryError: %s", _err->message());
 910   tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
 911 
 912   // make heap parsability
 913   Universe::heap()->ensure_parsability(false);  // no need to retire TLABs
 914 
 915   char* cmd;
 916   const char* ptr = OnOutOfMemoryError;
 917   while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
 918     tty->print("#   Executing ");
 919 #if defined(LINUX)
 920     tty->print  ("/bin/sh -c ");
 921 #elif defined(SOLARIS)
 922     tty->print  ("/usr/bin/sh -c ");
 923 #endif
 924     tty->print_cr("\"%s\"...", cmd);
 925 
 926     os::fork_and_exec(cmd);
 927   }
 928 }
 929 
 930 void VMError::report_java_out_of_memory() {
 931   if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
 932     MutexLocker ml(Heap_lock);
 933     VM_ReportJavaOutOfMemory op(this);
 934     VMThread::execute(&op);
 935   }
 936 }
--- EOF ---