1 /*
   2  * Copyright (c) 2003, 2015, 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 #include <fcntl.h>
  26 #include "precompiled.hpp"
  27 #include "code/codeCache.hpp"
  28 #include "compiler/compileBroker.hpp"
  29 #include "compiler/disassembler.hpp"
  30 #include "gc/shared/collectedHeap.hpp"
  31 #include "prims/whitebox.hpp"
  32 #include "runtime/arguments.hpp"
  33 #include "runtime/atomic.inline.hpp"
  34 #include "runtime/frame.inline.hpp"
  35 #include "runtime/init.hpp"
  36 #include "runtime/os.hpp"
  37 #include "runtime/thread.inline.hpp"
  38 #include "runtime/vmThread.hpp"
  39 #include "runtime/vm_operations.hpp"
  40 #include "services/memTracker.hpp"
  41 #include "utilities/debug.hpp"
  42 #include "utilities/decoder.hpp"
  43 #include "utilities/defaultStream.hpp"
  44 #include "utilities/errorReporter.hpp"
  45 #include "utilities/events.hpp"
  46 #include "utilities/top.hpp"
  47 #include "utilities/vmError.hpp"
  48 
  49 // List of environment variables that should be reported in error log file.
  50 const char *env_list[] = {
  51   // All platforms
  52   "JAVA_HOME", "JRE_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
  53   "JAVA_COMPILER", "PATH", "USERNAME",
  54 
  55   // Env variables that are defined on Solaris/Linux/BSD
  56   "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
  57   "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
  58 
  59   // defined on Linux
  60   "LD_ASSUME_KERNEL", "_JAVA_SR_SIGNUM",
  61 
  62   // defined on Darwin
  63   "DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH",
  64   "DYLD_FRAMEWORK_PATH", "DYLD_FALLBACK_FRAMEWORK_PATH",
  65   "DYLD_INSERT_LIBRARIES",
  66 
  67   // defined on Windows
  68   "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR",
  69 
  70   (const char *)0
  71 };
  72 
  73 // A simple parser for -XX:OnError, usage:
  74 //  ptr = OnError;
  75 //  while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != NULL)
  76 //     ... ...
  77 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
  78   if (ptr == NULL || *ptr == NULL) return NULL;
  79 
  80   const char* cmd = *ptr;
  81 
  82   // skip leading blanks or ';'
  83   while (*cmd == ' ' || *cmd == ';') cmd++;
  84 
  85   if (*cmd == '\0') return NULL;
  86 
  87   const char * cmdend = cmd;
  88   while (*cmdend != '\0' && *cmdend != ';') cmdend++;
  89 
  90   Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
  91 
  92   *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
  93   return buf;
  94 }
  95 
  96 static void print_bug_submit_message(outputStream *out, Thread *thread) {
  97   if (out == NULL) return;
  98   out->print_raw_cr("# If you would like to submit a bug report, please visit:");
  99   out->print_raw   ("#   ");
 100   out->print_raw_cr(Arguments::java_vendor_url_bug());
 101   // If the crash is in native code, encourage user to submit a bug to the
 102   // provider of that code.
 103   if (thread && thread->is_Java_thread() &&
 104       !thread->is_hidden_from_external_view()) {
 105     JavaThread* jt = (JavaThread*)thread;
 106     if (jt->thread_state() == _thread_in_native) {
 107       out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
 108     }
 109   }
 110   out->print_raw_cr("#");
 111 }
 112 
 113 bool VMError::coredump_status;
 114 char VMError::coredump_message[O_BUFLEN];
 115 
 116 void VMError::record_coredump_status(const char* message, bool status) {
 117   coredump_status = status;
 118   strncpy(coredump_message, message, sizeof(coredump_message));
 119   coredump_message[sizeof(coredump_message)-1] = 0;
 120 }
 121 
 122 // Return a string to describe the error
 123 char* VMError::error_string(char* buf, int buflen) {
 124   char signame_buf[64];
 125   const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
 126 
 127   if (signame) {
 128     jio_snprintf(buf, buflen,
 129                  "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
 130                  signame, _id, _pc,
 131                  os::current_process_id(), os::current_thread_id());
 132   } else if (_filename != NULL && _lineno > 0) {
 133     // skip directory names
 134     char separator = os::file_separator()[0];
 135     const char *p = strrchr(_filename, separator);
 136     int n = jio_snprintf(buf, buflen,
 137                          "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT,
 138                          p ? p + 1 : _filename, _lineno,
 139                          os::current_process_id(), os::current_thread_id());
 140     if (n >= 0 && n < buflen && _message) {
 141       if (strlen(_detail_msg) > 0) {
 142         jio_snprintf(buf + n, buflen - n, "%s%s: %s",
 143         os::line_separator(), _message, _detail_msg);
 144       } else {
 145         jio_snprintf(buf + n, buflen - n, "%sError: %s",
 146                      os::line_separator(), _message);
 147       }
 148     }
 149   } else {
 150     jio_snprintf(buf, buflen,
 151                  "Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
 152                  _id, os::current_process_id(), os::current_thread_id());
 153   }
 154 
 155   return buf;
 156 }
 157 
 158 void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
 159                                 char* buf, int buflen, bool verbose) {
 160 #ifdef ZERO
 161   if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
 162     // StackFrameStream uses the frame anchor, which may not have
 163     // been set up.  This can be done at any time in Zero, however,
 164     // so if it hasn't been set up then we just set it up now and
 165     // clear it again when we're done.
 166     bool has_last_Java_frame = jt->has_last_Java_frame();
 167     if (!has_last_Java_frame)
 168       jt->set_last_Java_frame();
 169     st->print("Java frames:");
 170 
 171     // If the top frame is a Shark frame and the frame anchor isn't
 172     // set up then it's possible that the information in the frame
 173     // is garbage: it could be from a previous decache, or it could
 174     // simply have never been written.  So we print a warning...
 175     StackFrameStream sfs(jt);
 176     if (!has_last_Java_frame && !sfs.is_done()) {
 177       if (sfs.current()->zeroframe()->is_shark_frame()) {
 178         st->print(" (TOP FRAME MAY BE JUNK)");
 179       }
 180     }
 181     st->cr();
 182 
 183     // Print the frames
 184     for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
 185       sfs.current()->zero_print_on_error(i, st, buf, buflen);
 186       st->cr();
 187     }
 188 
 189     // Reset the frame anchor if necessary
 190     if (!has_last_Java_frame)
 191       jt->reset_last_Java_frame();
 192   }
 193 #else
 194   if (jt->has_last_Java_frame()) {
 195     st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
 196     for(StackFrameStream sfs(jt); !sfs.is_done(); sfs.next()) {
 197       sfs.current()->print_on_error(st, buf, buflen, verbose);
 198       st->cr();
 199     }
 200   }
 201 #endif // ZERO
 202 }
 203 
 204 static void print_oom_reasons(outputStream* st) {
 205   st->print_cr("# Possible reasons:");
 206   st->print_cr("#   The system is out of physical RAM or swap space");
 207   st->print_cr("#   In 32 bit mode, the process size limit was hit");
 208   st->print_cr("# Possible solutions:");
 209   st->print_cr("#   Reduce memory load on the system");
 210   st->print_cr("#   Increase physical memory or swap space");
 211   st->print_cr("#   Check if swap backing store is full");
 212   st->print_cr("#   Use 64 bit Java on a 64 bit OS");
 213   st->print_cr("#   Decrease Java heap size (-Xmx/-Xms)");
 214   st->print_cr("#   Decrease number of Java threads");
 215   st->print_cr("#   Decrease Java thread stack sizes (-Xss)");
 216   st->print_cr("#   Set larger code cache with -XX:ReservedCodeCacheSize=");
 217   st->print_cr("# This output file may be truncated or incomplete.");
 218 }
 219 
 220 static const char* gc_mode() {
 221   if (UseG1GC)            return "g1 gc";
 222   if (UseParallelGC)      return "parallel gc";
 223   if (UseConcMarkSweepGC) return "concurrent mark sweep gc";
 224   if (UseSerialGC)        return "serial gc";
 225   return "ERROR in GC mode";
 226 }
 227 
 228 static void report_vm_version(outputStream* st, char* buf, int buflen) {
 229    // VM version
 230    st->print_cr("#");
 231    JDK_Version::current().to_string(buf, buflen);
 232    const char* runtime_name = JDK_Version::runtime_name() != NULL ?
 233                                 JDK_Version::runtime_name() : "";
 234    const char* runtime_version = JDK_Version::runtime_version() != NULL ?
 235                                 JDK_Version::runtime_version() : "";
 236    st->print_cr("# JRE version: %s (%s) (build %s)", runtime_name, buf, runtime_version);
 237    // This is the long version with some default settings added
 238    st->print_cr("# Java VM: %s (%s, %s%s%s%s%s, %s, %s)",
 239                  Abstract_VM_Version::vm_name(),
 240                  Abstract_VM_Version::vm_release(),
 241                  Abstract_VM_Version::vm_info_string(),
 242                  TieredCompilation ? ", tiered" : "",
 243 #if INCLUDE_JVMCI
 244                  EnableJVMCI ? ", jvmci" : "",
 245                  UseJVMCICompiler ? ", jvmci compiler" : "",
 246 #else
 247                  "", "",
 248 #endif
 249                  UseCompressedOops ? ", compressed oops" : "",
 250                  gc_mode(),
 251                  Abstract_VM_Version::vm_platform_string()
 252                );
 253 }
 254 
 255 // This is the main function to report a fatal error. Only one thread can
 256 // call this function, so we don't need to worry about MT-safety. But it's
 257 // possible that the error handler itself may crash or die on an internal
 258 // error, for example, when the stack/heap is badly damaged. We must be
 259 // able to handle recursive errors that happen inside error handler.
 260 //
 261 // Error reporting is done in several steps. If a crash or internal error
 262 // occurred when reporting an error, the nested signal/exception handler
 263 // can skip steps that are already (or partially) done. Error reporting will
 264 // continue from the next step. This allows us to retrieve and print
 265 // information that may be unsafe to get after a fatal error. If it happens,
 266 // you may find nested report_and_die() frames when you look at the stack
 267 // in a debugger.
 268 //
 269 // In general, a hang in error handler is much worse than a crash or internal
 270 // error, as it's harder to recover from a hang. Deadlock can happen if we
 271 // try to grab a lock that is already owned by current thread, or if the
 272 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
 273 // error handler and all the functions it called should avoid grabbing any
 274 // lock. An important thing to notice is that memory allocation needs a lock.
 275 //
 276 // We should avoid using large stack allocated buffers. Many errors happen
 277 // when stack space is already low. Making things even worse is that there
 278 // could be nested report_and_die() calls on stack (see above). Only one
 279 // thread can report error, so large buffers are statically allocated in data
 280 // segment.
 281 
 282 int          VMError::_current_step;
 283 const char*  VMError::_current_step_info;
 284 
 285 void VMError::report(outputStream* st, bool _verbose) {
 286 
 287 # define BEGIN if (_current_step == 0) { _current_step = 1;
 288 # define STEP(n, s) } if (_current_step < n) { _current_step = n; _current_step_info = s;
 289 # define END }
 290 
 291   // don't allocate large buffer on stack
 292   static char buf[O_BUFLEN];
 293 
 294   BEGIN
 295 
 296   STEP(10, "(printing fatal error message)")
 297 
 298     st->print_cr("#");
 299     if (should_report_bug(_id)) {
 300       st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
 301     } else {
 302       st->print_cr("# There is insufficient memory for the Java "
 303                    "Runtime Environment to continue.");
 304     }
 305 
 306 #ifndef PRODUCT
 307   // Error handler self tests
 308 
 309   // test secondary error handling. Test it twice, to test that resetting
 310   // error handler after a secondary crash works.
 311   STEP(20, "(test secondary crash 1)")
 312     if (_verbose && TestCrashInErrorHandler != 0) {
 313       st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
 314         TestCrashInErrorHandler);
 315       controlled_crash(TestCrashInErrorHandler);
 316     }
 317 
 318   STEP(30, "(test secondary crash 2)")
 319     if (_verbose && TestCrashInErrorHandler != 0) {
 320       st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
 321         TestCrashInErrorHandler);
 322       controlled_crash(TestCrashInErrorHandler);
 323     }
 324 
 325   STEP(40, "(test safefetch in error handler)")
 326     // test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
 327     // to test that resetting the signal handler works correctly.
 328     if (_verbose && TestSafeFetchInErrorHandler) {
 329       st->print_cr("Will test SafeFetch...");
 330       if (CanUseSafeFetch32()) {
 331         int* const invalid_pointer = (int*) get_segfault_address();
 332         const int x = 0x76543210;
 333         int i1 = SafeFetch32(invalid_pointer, x);
 334         int i2 = SafeFetch32(invalid_pointer, x);
 335         if (i1 == x && i2 == x) {
 336           st->print_cr("SafeFetch OK."); // Correctly deflected and returned default pattern
 337         } else {
 338           st->print_cr("??");
 339         }
 340       } else {
 341         st->print_cr("not possible; skipped.");
 342       }
 343     }
 344 #endif // PRODUCT
 345 
 346   STEP(50, "(printing type of error)")
 347 
 348      switch(_id) {
 349        case OOM_MALLOC_ERROR:
 350        case OOM_MMAP_ERROR:
 351          if (_size) {
 352            st->print("# Native memory allocation ");
 353            st->print((_id == (int)OOM_MALLOC_ERROR) ? "(malloc) failed to allocate " :
 354                                                  "(mmap) failed to map ");
 355            jio_snprintf(buf, sizeof(buf), SIZE_FORMAT, _size);
 356            st->print("%s", buf);
 357            st->print(" bytes");
 358            if (strlen(_detail_msg) > 0) {
 359              st->print(" for ");
 360              st->print("%s", _detail_msg);
 361            }
 362            st->cr();
 363          } else {
 364            if (strlen(_detail_msg) > 0) {
 365              st->print("# ");
 366              st->print_cr("%s", _detail_msg);
 367            }
 368          }
 369          // In error file give some solutions
 370          if (_verbose) {
 371            print_oom_reasons(st);
 372          } else {
 373            return;  // that's enough for the screen
 374          }
 375          break;
 376        case INTERNAL_ERROR:
 377        default:
 378          break;
 379      }
 380 
 381   STEP(60, "(printing exception/signal name)")
 382 
 383      st->print_cr("#");
 384      st->print("#  ");
 385      // Is it an OS exception/signal?
 386      if (os::exception_name(_id, buf, sizeof(buf))) {
 387        st->print("%s", buf);
 388        st->print(" (0x%x)", _id);                // signal number
 389        st->print(" at pc=" PTR_FORMAT, p2i(_pc));
 390      } else {
 391        if (should_report_bug(_id)) {
 392          st->print("Internal Error");
 393        } else {
 394          st->print("Out of Memory Error");
 395        }
 396        if (_filename != NULL && _lineno > 0) {
 397 #ifdef PRODUCT
 398          // In product mode chop off pathname?
 399          char separator = os::file_separator()[0];
 400          const char *p = strrchr(_filename, separator);
 401          const char *file = p ? p+1 : _filename;
 402 #else
 403          const char *file = _filename;
 404 #endif
 405          st->print(" (%s:%d)", file, _lineno);
 406        } else {
 407          st->print(" (0x%x)", _id);
 408        }
 409      }
 410 
 411   STEP(70, "(printing current thread and pid)")
 412 
 413      // process id, thread id
 414      st->print(", pid=%d", os::current_process_id());
 415      st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
 416      st->cr();
 417 
 418   STEP(80, "(printing error message)")
 419 
 420      if (should_report_bug(_id)) {  // already printed the message.
 421        // error message
 422        if (strlen(_detail_msg) > 0) {
 423          st->print_cr("#  %s: %s", _message ? _message : "Error", _detail_msg);
 424        } else if (_message) {
 425          st->print_cr("#  Error: %s", _message);
 426        }
 427      }
 428 
 429   STEP(90, "(printing Java version string)")
 430 
 431      report_vm_version(st, buf, sizeof(buf));
 432 
 433   STEP(100, "(printing problematic frame)")
 434 
 435      // Print current frame if we have a context (i.e. it's a crash)
 436      if (_context) {
 437        st->print_cr("# Problematic frame:");
 438        st->print("# ");
 439        frame fr = os::fetch_frame_from_context(_context);
 440        fr.print_on_error(st, buf, sizeof(buf));
 441        st->cr();
 442        st->print_cr("#");
 443      }
 444 
 445   STEP(110, "(printing core file information)")
 446     st->print("# ");
 447     if (CreateCoredumpOnCrash) {
 448       if (coredump_status) {
 449         st->print("Core dump will be written. Default location: %s", coredump_message);
 450       } else {
 451         st->print("No core dump will be written. %s", coredump_message);
 452       }
 453     } else {
 454       st->print("CreateCoredumpOnCrash turned off, no core file dumped");
 455     }
 456     st->cr();
 457     st->print_cr("#");
 458 
 459   STEP(120, "(printing bug submit message)")
 460 
 461      if (should_report_bug(_id) && _verbose) {
 462        print_bug_submit_message(st, _thread);
 463      }
 464 
 465   STEP(130, "(printing summary)" )
 466 
 467      if (_verbose) {
 468        st->cr();
 469        st->print_cr("---------------  S U M M A R Y ------------");
 470        st->cr();
 471      }
 472 
 473   STEP(140, "(printing VM option summary)" )
 474 
 475      if (_verbose) {
 476        // VM options
 477        Arguments::print_summary_on(st);
 478        st->cr();
 479      }
 480 
 481   STEP(150, "(printing summary machine and OS info)")
 482 
 483      if (_verbose) {
 484        os::print_summary_info(st, buf, sizeof(buf));
 485      }
 486 
 487 
 488   STEP(160, "(printing date and time)" )
 489 
 490      if (_verbose) {
 491        os::print_date_and_time(st, buf, sizeof(buf));
 492      }
 493 
 494   STEP(170, "(printing thread)" )
 495 
 496      if (_verbose) {
 497        st->cr();
 498        st->print_cr("---------------  T H R E A D  ---------------");
 499        st->cr();
 500      }
 501 
 502   STEP(180, "(printing current thread)" )
 503 
 504      // current thread
 505      if (_verbose) {
 506        if (_thread) {
 507          st->print("Current thread (" PTR_FORMAT "):  ", p2i(_thread));
 508          _thread->print_on_error(st, buf, sizeof(buf));
 509          st->cr();
 510        } else {
 511          st->print_cr("Current thread is native thread");
 512        }
 513        st->cr();
 514      }
 515 
 516   STEP(190, "(printing current compile task)" )
 517 
 518      if (_verbose && _thread && _thread->is_Compiler_thread()) {
 519         CompilerThread* t = (CompilerThread*)_thread;
 520         if (t->task()) {
 521            st->cr();
 522            st->print_cr("Current CompileTask:");
 523            t->task()->print_line_on_error(st, buf, sizeof(buf));
 524            st->cr();
 525         }
 526      }
 527 
 528 
 529   STEP(200, "(printing stack bounds)" )
 530 
 531      if (_verbose) {
 532        st->print("Stack: ");
 533 
 534        address stack_top;
 535        size_t stack_size;
 536 
 537        if (_thread) {
 538           stack_top = _thread->stack_base();
 539           stack_size = _thread->stack_size();
 540        } else {
 541           stack_top = os::current_stack_base();
 542           stack_size = os::current_stack_size();
 543        }
 544 
 545        address stack_bottom = stack_top - stack_size;
 546        st->print("[" PTR_FORMAT "," PTR_FORMAT "]", p2i(stack_bottom), p2i(stack_top));
 547 
 548        frame fr = _context ? os::fetch_frame_from_context(_context)
 549                            : os::current_frame();
 550 
 551        if (fr.sp()) {
 552          st->print(",  sp=" PTR_FORMAT, p2i(fr.sp()));
 553          size_t free_stack_size = pointer_delta(fr.sp(), stack_bottom, 1024);
 554          st->print(",  free space=" SIZE_FORMAT "k", free_stack_size);
 555        }
 556 
 557        st->cr();
 558      }
 559 
 560   STEP(210, "(printing native stack)" )
 561 
 562    if (_verbose) {
 563      if (os::platform_print_native_stack(st, _context, buf, sizeof(buf))) {
 564        // We have printed the native stack in platform-specific code
 565        // Windows/x64 needs special handling.
 566      } else {
 567        frame fr = _context ? os::fetch_frame_from_context(_context)
 568                            : os::current_frame();
 569 
 570        print_native_stack(st, fr, _thread, buf, sizeof(buf));
 571      }
 572    }
 573 
 574   STEP(220, "(printing Java stack)" )
 575 
 576      if (_verbose && _thread && _thread->is_Java_thread()) {
 577        print_stack_trace(st, (JavaThread*)_thread, buf, sizeof(buf));
 578      }
 579 
 580   STEP(230, "(printing target Java thread stack)" )
 581 
 582      // printing Java thread stack trace if it is involved in GC crash
 583      if (_verbose && _thread && (_thread->is_Named_thread())) {
 584        JavaThread*  jt = ((NamedThread *)_thread)->processed_thread();
 585        if (jt != NULL) {
 586          st->print_cr("JavaThread " PTR_FORMAT " (nid = %d) was being processed", p2i(jt), jt->osthread()->thread_id());
 587          print_stack_trace(st, jt, buf, sizeof(buf), true);
 588        }
 589      }
 590 
 591   STEP(240, "(printing siginfo)" )
 592 
 593      // signal no, signal code, address that caused the fault
 594      if (_verbose && _siginfo) {
 595        st->cr();
 596        os::print_siginfo(st, _siginfo);
 597        st->cr();
 598      }
 599 
 600   STEP(245, "(CDS archive access warning)" )
 601 
 602      // Print an explicit hint if we crashed on access to the CDS archive.
 603      if (_verbose && _siginfo) {
 604        check_failing_cds_access(st, _siginfo);
 605        st->cr();
 606      }
 607 
 608   STEP(250, "(printing register info)")
 609 
 610      // decode register contents if possible
 611      if (_verbose && _context && Universe::is_fully_initialized()) {
 612        os::print_register_info(st, _context);
 613        st->cr();
 614      }
 615 
 616   STEP(260, "(printing registers, top of stack, instructions near pc)")
 617 
 618      // registers, top of stack, instructions near pc
 619      if (_verbose && _context) {
 620        os::print_context(st, _context);
 621        st->cr();
 622      }
 623 
 624   STEP(265, "(printing code blob if possible)")
 625 
 626      if (_verbose && _context) {
 627        CodeBlob* cb = CodeCache::find_blob(_pc);
 628        if (cb != NULL) {
 629          if (Interpreter::contains(_pc)) {
 630            // The interpreter CodeBlob is very large so try to print the codelet instead.
 631            InterpreterCodelet* codelet = Interpreter::codelet_containing(_pc);
 632            if (codelet != NULL) {
 633              codelet->print_on(st);
 634              Disassembler::decode(codelet->code_begin(), codelet->code_end(), st);
 635            }
 636          } else {
 637            StubCodeDesc* desc = StubCodeDesc::desc_for(_pc);
 638            if (desc != NULL) {
 639              desc->print_on(st);
 640              Disassembler::decode(desc->begin(), desc->end(), st);
 641            } else {
 642              Disassembler::decode(cb, st);
 643              st->cr();
 644            }
 645          }
 646        }
 647      }
 648 
 649   STEP(270, "(printing VM operation)" )
 650 
 651      if (_verbose && _thread && _thread->is_VM_thread()) {
 652         VMThread* t = (VMThread*)_thread;
 653         VM_Operation* op = t->vm_operation();
 654         if (op) {
 655           op->print_on_error(st);
 656           st->cr();
 657           st->cr();
 658         }
 659      }
 660 
 661   STEP(280, "(printing process)" )
 662 
 663      if (_verbose) {
 664        st->cr();
 665        st->print_cr("---------------  P R O C E S S  ---------------");
 666        st->cr();
 667      }
 668 
 669   STEP(290, "(printing all threads)" )
 670 
 671      // all threads
 672      if (_verbose && _thread) {
 673        Threads::print_on_error(st, _thread, buf, sizeof(buf));
 674        st->cr();
 675      }
 676 
 677   STEP(300, "(printing VM state)" )
 678 
 679      if (_verbose) {
 680        // Safepoint state
 681        st->print("VM state:");
 682 
 683        if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
 684        else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
 685        else st->print("not at safepoint");
 686 
 687        // Also see if error occurred during initialization or shutdown
 688        if (!Universe::is_fully_initialized()) {
 689          st->print(" (not fully initialized)");
 690        } else if (VM_Exit::vm_exited()) {
 691          st->print(" (shutting down)");
 692        } else {
 693          st->print(" (normal execution)");
 694        }
 695        st->cr();
 696        st->cr();
 697      }
 698 
 699   STEP(310, "(printing owned locks on error)" )
 700 
 701      // mutexes/monitors that currently have an owner
 702      if (_verbose) {
 703        print_owned_locks_on_error(st);
 704        st->cr();
 705      }
 706 
 707   STEP(320, "(printing number of OutOfMemoryError and StackOverflow exceptions)")
 708 
 709      if (_verbose && Exceptions::has_exception_counts()) {
 710        st->print_cr("OutOfMemory and StackOverflow Exception counts:");
 711        Exceptions::print_exception_counts_on_error(st);
 712        st->cr();
 713      }
 714 
 715   STEP(330, "(printing compressed oops mode")
 716 
 717      if (_verbose && UseCompressedOops) {
 718        Universe::print_compressed_oops_mode(st);
 719        if (UseCompressedClassPointers) {
 720          Metaspace::print_compressed_class_space(st);
 721        }
 722        st->cr();
 723      }
 724 
 725   STEP(340, "(printing heap information)" )
 726 
 727      if (_verbose && Universe::is_fully_initialized()) {
 728        Universe::heap()->print_on_error(st);
 729        st->cr();
 730        st->print_cr("Polling page: " INTPTR_FORMAT, p2i(os::get_polling_page()));
 731        st->cr();
 732      }
 733 
 734   STEP(350, "(printing code cache information)" )
 735 
 736      if (_verbose && Universe::is_fully_initialized()) {
 737        // print code cache information before vm abort
 738        CodeCache::print_summary(st);
 739        st->cr();
 740      }
 741 
 742   STEP(360, "(printing ring buffers)" )
 743 
 744      if (_verbose) {
 745        Events::print_all(st);
 746        st->cr();
 747      }
 748 
 749   STEP(370, "(printing dynamic libraries)" )
 750 
 751      if (_verbose) {
 752        // dynamic libraries, or memory map
 753        os::print_dll_info(st);
 754        st->cr();
 755      }
 756 
 757   STEP(380, "(printing VM options)" )
 758 
 759      if (_verbose) {
 760        // VM options
 761        Arguments::print_on(st);
 762        st->cr();
 763      }
 764 
 765   STEP(390, "(printing warning if internal testing API used)" )
 766 
 767      if (WhiteBox::used()) {
 768        st->print_cr("Unsupported internal testing APIs have been used.");
 769        st->cr();
 770      }
 771 
 772   STEP(400, "(printing all environment variables)" )
 773 
 774      if (_verbose) {
 775        os::print_environment_variables(st, env_list);
 776        st->cr();
 777      }
 778 
 779   STEP(410, "(printing signal handlers)" )
 780 
 781      if (_verbose) {
 782        os::print_signal_handlers(st, buf, sizeof(buf));
 783        st->cr();
 784      }
 785 
 786   STEP(420, "(Native Memory Tracking)" )
 787      if (_verbose) {
 788        MemTracker::error_report(st);
 789      }
 790 
 791   STEP(430, "(printing system)" )
 792 
 793      if (_verbose) {
 794        st->cr();
 795        st->print_cr("---------------  S Y S T E M  ---------------");
 796        st->cr();
 797      }
 798 
 799   STEP(440, "(printing OS information)" )
 800 
 801      if (_verbose) {
 802        os::print_os_info(st);
 803        st->cr();
 804      }
 805 
 806   STEP(450, "(printing CPU info)" )
 807      if (_verbose) {
 808        os::print_cpu_info(st, buf, sizeof(buf));
 809        st->cr();
 810      }
 811 
 812   STEP(460, "(printing memory info)" )
 813 
 814      if (_verbose) {
 815        os::print_memory_info(st);
 816        st->cr();
 817      }
 818 
 819   STEP(470, "(printing internal vm info)" )
 820 
 821      if (_verbose) {
 822        st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
 823        st->cr();
 824      }
 825 
 826   // print a defined marker to show that error handling finished correctly.
 827   STEP(480, "(printing end marker)" )
 828 
 829      if (_verbose) {
 830        st->print_cr("END.");
 831      }
 832 
 833   END
 834 
 835 # undef BEGIN
 836 # undef STEP
 837 # undef END
 838 }
 839 
 840 // Report for the vm_info_cmd. This prints out the information above omitting
 841 // crash and thread specific information.  If output is added above, it should be added
 842 // here also, if it is safe to call during a running process.
 843 void VMError::print_vm_info(outputStream* st) {
 844 
 845   char buf[O_BUFLEN];
 846   report_vm_version(st, buf, sizeof(buf));
 847 
 848   // STEP("(printing summary)")
 849 
 850   st->cr();
 851   st->print_cr("---------------  S U M M A R Y ------------");
 852   st->cr();
 853 
 854   // STEP("(printing VM option summary)")
 855 
 856   // VM options
 857   Arguments::print_summary_on(st);
 858   st->cr();
 859 
 860   // STEP("(printing summary machine and OS info)")
 861 
 862   os::print_summary_info(st, buf, sizeof(buf));
 863 
 864   // STEP("(printing date and time)")
 865 
 866   os::print_date_and_time(st, buf, sizeof(buf));
 867 
 868   // Skip: STEP("(printing thread)")
 869 
 870   // STEP("(printing process)")
 871 
 872   st->cr();
 873   st->print_cr("---------------  P R O C E S S  ---------------");
 874   st->cr();
 875 
 876   // STEP("(printing number of OutOfMemoryError and StackOverflow exceptions)")
 877 
 878   if (Exceptions::has_exception_counts()) {
 879     st->print_cr("OutOfMemory and StackOverflow Exception counts:");
 880     Exceptions::print_exception_counts_on_error(st);
 881     st->cr();
 882   }
 883 
 884   // STEP("(printing compressed oops mode")
 885 
 886   if (UseCompressedOops) {
 887     Universe::print_compressed_oops_mode(st);
 888     if (UseCompressedClassPointers) {
 889       Metaspace::print_compressed_class_space(st);
 890     }
 891     st->cr();
 892   }
 893 
 894   // STEP("(printing heap information)")
 895 
 896   if (Universe::is_fully_initialized()) {
 897     Universe::heap()->print_on_error(st);
 898     st->cr();
 899     st->print_cr("Polling page: " INTPTR_FORMAT, p2i(os::get_polling_page()));
 900     st->cr();
 901   }
 902 
 903   // STEP("(printing code cache information)")
 904 
 905   if (Universe::is_fully_initialized()) {
 906     // print code cache information before vm abort
 907     CodeCache::print_summary(st);
 908     st->cr();
 909   }
 910 
 911   // STEP("(printing ring buffers)")
 912 
 913   Events::print_all(st);
 914   st->cr();
 915 
 916   // STEP("(printing dynamic libraries)")
 917 
 918   // dynamic libraries, or memory map
 919   os::print_dll_info(st);
 920   st->cr();
 921 
 922   // STEP("(printing VM options)")
 923 
 924   // VM options
 925   Arguments::print_on(st);
 926   st->cr();
 927 
 928   // STEP("(printing warning if internal testing API used)")
 929 
 930   if (WhiteBox::used()) {
 931     st->print_cr("Unsupported internal testing APIs have been used.");
 932     st->cr();
 933   }
 934 
 935   // STEP("(printing all environment variables)")
 936 
 937   os::print_environment_variables(st, env_list);
 938   st->cr();
 939 
 940   // STEP("(printing signal handlers)")
 941 
 942   os::print_signal_handlers(st, buf, sizeof(buf));
 943   st->cr();
 944 
 945   // STEP("(Native Memory Tracking)")
 946 
 947   MemTracker::error_report(st);
 948 
 949   // STEP("(printing system)")
 950 
 951   st->cr();
 952   st->print_cr("---------------  S Y S T E M  ---------------");
 953   st->cr();
 954 
 955   // STEP("(printing OS information)")
 956 
 957   os::print_os_info(st);
 958   st->cr();
 959 
 960   // STEP("(printing CPU info)")
 961 
 962   os::print_cpu_info(st, buf, sizeof(buf));
 963   st->cr();
 964 
 965   // STEP("(printing memory info)")
 966 
 967   os::print_memory_info(st);
 968   st->cr();
 969 
 970   // STEP("(printing internal vm info)")
 971 
 972   st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
 973   st->cr();
 974 
 975   // print a defined marker to show that error handling finished correctly.
 976   // STEP("(printing end marker)")
 977 
 978   st->print_cr("END.");
 979 }
 980 
 981 volatile intptr_t VMError::first_error_tid = -1;
 982 
 983 // An error could happen before tty is initialized or after it has been
 984 // destroyed. Here we use a very simple unbuffered fdStream for printing.
 985 // Only out.print_raw() and out.print_raw_cr() should be used, as other
 986 // printing methods need to allocate large buffer on stack. To format a
 987 // string, use jio_snprintf() with a static buffer or use staticBufferStream.
 988 fdStream VMError::out(defaultStream::output_fd());
 989 fdStream VMError::log; // error log used by VMError::report_and_die()
 990 
 991 /** Expand a pattern into a buffer starting at pos and open a file using constructed path */
 992 static int expand_and_open(const char* pattern, char* buf, size_t buflen, size_t pos) {
 993   int fd = -1;
 994   if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) {
 995     // the O_EXCL flag will cause the open to fail if the file exists
 996     fd = open(buf, O_RDWR | O_CREAT | O_EXCL, 0666);
 997   }
 998   return fd;
 999 }
1000 
1001 /**
1002  * Construct file name for a log file and return it's file descriptor.
1003  * Name and location depends on pattern, default_pattern params and access
1004  * permissions.
1005  */
1006 static int prepare_log_file(const char* pattern, const char* default_pattern, char* buf, size_t buflen) {
1007   int fd = -1;
1008 
1009   // If possible, use specified pattern to construct log file name
1010   if (pattern != NULL) {
1011     fd = expand_and_open(pattern, buf, buflen, 0);
1012   }
1013 
1014   // Either user didn't specify, or the user's location failed,
1015   // so use the default name in the current directory
1016   if (fd == -1) {
1017     const char* cwd = os::get_current_directory(buf, buflen);
1018     if (cwd != NULL) {
1019       size_t pos = strlen(cwd);
1020       int fsep_len = jio_snprintf(&buf[pos], buflen-pos, "%s", os::file_separator());
1021       pos += fsep_len;
1022       if (fsep_len > 0) {
1023         fd = expand_and_open(default_pattern, buf, buflen, pos);
1024       }
1025     }
1026   }
1027 
1028    // try temp directory if it exists.
1029    if (fd == -1) {
1030      const char* tmpdir = os::get_temp_directory();
1031      if (tmpdir != NULL && strlen(tmpdir) > 0) {
1032        int pos = jio_snprintf(buf, buflen, "%s%s", tmpdir, os::file_separator());
1033        if (pos > 0) {
1034          fd = expand_and_open(default_pattern, buf, buflen, pos);
1035        }
1036      }
1037    }
1038 
1039   return fd;
1040 }
1041 
1042 int         VMError::_id;
1043 const char* VMError::_message;
1044 char        VMError::_detail_msg[1024];
1045 Thread*     VMError::_thread;
1046 address     VMError::_pc;
1047 void*       VMError::_siginfo;
1048 void*       VMError::_context;
1049 const char* VMError::_filename;
1050 int         VMError::_lineno;
1051 size_t      VMError::_size;
1052 
1053 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo,
1054                              void* context, const char* detail_fmt, ...)
1055 {
1056   va_list detail_args;
1057   va_start(detail_args, detail_fmt);
1058   report_and_die(sig, NULL, detail_fmt, detail_args, thread, pc, siginfo, context, NULL, 0, 0);
1059   va_end(detail_args);
1060 }
1061 
1062 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, void* context)
1063 {
1064   report_and_die(thread, sig, pc, siginfo, context, "%s", "");
1065 }
1066 
1067 void VMError::report_and_die(const char* message, const char* detail_fmt, ...)
1068 {
1069   va_list detail_args;
1070   va_start(detail_args, detail_fmt);
1071   report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, NULL, NULL, NULL, NULL, NULL, 0, 0);
1072   va_end(detail_args);
1073 }
1074 
1075 void VMError::report_and_die(const char* message)
1076 {
1077   report_and_die(message, "%s", "");
1078 }
1079 
1080 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, const char* message,
1081                              const char* detail_fmt, va_list detail_args)
1082 {
1083   report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, thread, NULL, NULL, NULL, filename, lineno, 0);
1084 }
1085 
1086 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, size_t size,
1087                              VMErrorType vm_err_type, const char* detail_fmt, va_list detail_args) {
1088   report_and_die(vm_err_type, NULL, detail_fmt, detail_args, thread, NULL, NULL, NULL, filename, lineno, size);
1089 }
1090 
1091 void VMError::report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args,
1092                              Thread* thread, address pc, void* siginfo, void* context, const char* filename,
1093                              int lineno, size_t size)
1094 {
1095   // Don't allocate large buffer on stack
1096   static char buffer[O_BUFLEN];
1097 
1098   // How many errors occurred in error handler when reporting first_error.
1099   static int recursive_error_count;
1100 
1101   // We will first print a brief message to standard out (verbose = false),
1102   // then save detailed information in log file (verbose = true).
1103   static bool out_done = false;         // done printing to standard out
1104   static bool log_done = false;         // done saving error log
1105   static bool transmit_report_done = false; // done error reporting
1106 
1107   if (SuppressFatalErrorMessage) {
1108       os::abort(CreateCoredumpOnCrash);
1109   }
1110   intptr_t mytid = os::current_thread_id();
1111   if (first_error_tid == -1 &&
1112       Atomic::cmpxchg_ptr(mytid, &first_error_tid, -1) == -1) {
1113 
1114     _id = id;
1115     _message = message;
1116     _thread = thread;
1117     _pc = pc;
1118     _siginfo = siginfo;
1119     _context = context;
1120     _filename = filename;
1121     _lineno = lineno;
1122     _size = size;
1123     jio_vsnprintf(_detail_msg, sizeof(_detail_msg), detail_fmt, detail_args);
1124 
1125     // first time
1126     set_error_reported();
1127 
1128     if (ShowMessageBoxOnError || PauseAtExit) {
1129       show_message_box(buffer, sizeof(buffer));
1130 
1131       // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
1132       // WatcherThread can kill JVM if the error handler hangs.
1133       ShowMessageBoxOnError = false;
1134     }
1135 
1136     os::check_dump_limit(buffer, sizeof(buffer));
1137 
1138     // reset signal handlers or exception filter; make sure recursive crashes
1139     // are handled properly.
1140     reset_signal_handlers();
1141 
1142   } else {
1143     // If UseOsErrorReporting we call this for each level of the call stack
1144     // while searching for the exception handler.  Only the first level needs
1145     // to be reported.
1146     if (UseOSErrorReporting && log_done) return;
1147 
1148     // This is not the first error, see if it happened in a different thread
1149     // or in the same thread during error reporting.
1150     if (first_error_tid != mytid) {
1151       char msgbuf[64];
1152       jio_snprintf(msgbuf, sizeof(msgbuf),
1153                    "[thread " INTX_FORMAT " also had an error]",
1154                    mytid);
1155       out.print_raw_cr(msgbuf);
1156 
1157       // error reporting is not MT-safe, block current thread
1158       os::infinite_sleep();
1159 
1160     } else {
1161       if (recursive_error_count++ > 30) {
1162         out.print_raw_cr("[Too many errors, abort]");
1163         os::die();
1164       }
1165 
1166       jio_snprintf(buffer, sizeof(buffer),
1167                    "[error occurred during error reporting %s, id 0x%x]",
1168                    _current_step_info, _id);
1169       if (log.is_open()) {
1170         log.cr();
1171         log.print_raw_cr(buffer);
1172         log.cr();
1173       } else {
1174         out.cr();
1175         out.print_raw_cr(buffer);
1176         out.cr();
1177       }
1178     }
1179   }
1180 
1181   // print to screen
1182   if (!out_done) {
1183     staticBufferStream sbs(buffer, sizeof(buffer), &out);
1184     report(&sbs, false);
1185 
1186     out_done = true;
1187 
1188     _current_step = 0;
1189     _current_step_info = "";
1190   }
1191 
1192   // print to error log file
1193   if (!log_done) {
1194     // see if log file is already open
1195     if (!log.is_open()) {
1196       // open log file
1197       int fd = prepare_log_file(ErrorFile, "hs_err_pid%p.log", buffer, sizeof(buffer));
1198       if (fd != -1) {
1199         out.print_raw("# An error report file with more information is saved as:\n# ");
1200         out.print_raw_cr(buffer);
1201 
1202         log.set_fd(fd);
1203       } else {
1204         out.print_raw_cr("# Can not save log file, dump to screen..");
1205         log.set_fd(defaultStream::output_fd());
1206         /* Error reporting currently needs dumpfile.
1207          * Maybe implement direct streaming in the future.*/
1208         transmit_report_done = true;
1209       }
1210     }
1211 
1212     staticBufferStream sbs(buffer, O_BUFLEN, &log);
1213     report(&sbs, true);
1214     _current_step = 0;
1215     _current_step_info = "";
1216 
1217     // Run error reporting to determine whether or not to report the crash.
1218     if (!transmit_report_done && should_report_bug(_id)) {
1219       transmit_report_done = true;
1220       const int fd2 = ::dup(log.fd());
1221       FILE* const hs_err = ::fdopen(fd2, "r");
1222       if (NULL != hs_err) {
1223         ErrorReporter er;
1224         er.call(hs_err, buffer, O_BUFLEN);
1225       }
1226       ::fclose(hs_err);
1227     }
1228 
1229     if (log.fd() != defaultStream::output_fd()) {
1230       close(log.fd());
1231     }
1232 
1233     log.set_fd(-1);
1234     log_done = true;
1235   }
1236 
1237 
1238   static bool skip_OnError = false;
1239   if (!skip_OnError && OnError && OnError[0]) {
1240     skip_OnError = true;
1241 
1242     out.print_raw_cr("#");
1243     out.print_raw   ("# -XX:OnError=\"");
1244     out.print_raw   (OnError);
1245     out.print_raw_cr("\"");
1246 
1247     char* cmd;
1248     const char* ptr = OnError;
1249     while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
1250       out.print_raw   ("#   Executing ");
1251 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
1252       out.print_raw   ("/bin/sh -c ");
1253 #elif defined(SOLARIS)
1254       out.print_raw   ("/usr/bin/sh -c ");
1255 #endif
1256       out.print_raw   ("\"");
1257       out.print_raw   (cmd);
1258       out.print_raw_cr("\" ...");
1259 
1260       if (os::fork_and_exec(cmd) < 0) {
1261         out.print_cr("os::fork_and_exec failed: %s (%d)", strerror(errno), errno);
1262       }
1263     }
1264 
1265     // done with OnError
1266     OnError = NULL;
1267   }
1268 
1269   static bool skip_replay = ReplayCompiles; // Do not overwrite file during replay
1270   if (DumpReplayDataOnError && _thread && _thread->is_Compiler_thread() && !skip_replay) {
1271     skip_replay = true;
1272     ciEnv* env = ciEnv::current();
1273     if (env != NULL) {
1274       int fd = prepare_log_file(ReplayDataFile, "replay_pid%p.log", buffer, sizeof(buffer));
1275       if (fd != -1) {
1276         FILE* replay_data_file = os::open(fd, "w");
1277         if (replay_data_file != NULL) {
1278           fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1279           env->dump_replay_data_unsafe(&replay_data_stream);
1280           out.print_raw("#\n# Compiler replay data is saved as:\n# ");
1281           out.print_raw_cr(buffer);
1282         } else {
1283           out.print_raw("#\n# Can't open file to dump replay data. Error: ");
1284           out.print_raw_cr(strerror(os::get_last_error()));
1285         }
1286       }
1287     }
1288   }
1289 
1290   static bool skip_bug_url = !should_report_bug(_id);
1291   if (!skip_bug_url) {
1292     skip_bug_url = true;
1293 
1294     out.print_raw_cr("#");
1295     print_bug_submit_message(&out, _thread);
1296   }
1297 
1298   if (!UseOSErrorReporting) {
1299     // os::abort() will call abort hooks, try it first.
1300     static bool skip_os_abort = false;
1301     if (!skip_os_abort) {
1302       skip_os_abort = true;
1303       bool dump_core = should_report_bug(_id);
1304       os::abort(dump_core && CreateCoredumpOnCrash, _siginfo, _context);
1305     }
1306 
1307     // if os::abort() doesn't abort, try os::die();
1308     os::die();
1309   }
1310 }
1311 
1312 /*
1313  * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
1314  * ensures utilities such as jmap can observe the process is a consistent state.
1315  */
1316 class VM_ReportJavaOutOfMemory : public VM_Operation {
1317  private:
1318   const char* _message;
1319  public:
1320   VM_ReportJavaOutOfMemory(const char* message) { _message = message; }
1321   VMOp_Type type() const                        { return VMOp_ReportJavaOutOfMemory; }
1322   void doit();
1323 };
1324 
1325 void VM_ReportJavaOutOfMemory::doit() {
1326   // Don't allocate large buffer on stack
1327   static char buffer[O_BUFLEN];
1328 
1329   tty->print_cr("#");
1330   tty->print_cr("# java.lang.OutOfMemoryError: %s", _message);
1331   tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
1332 
1333   // make heap parsability
1334   Universe::heap()->ensure_parsability(false);  // no need to retire TLABs
1335 
1336   char* cmd;
1337   const char* ptr = OnOutOfMemoryError;
1338   while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
1339     tty->print("#   Executing ");
1340 #if defined(LINUX)
1341     tty->print  ("/bin/sh -c ");
1342 #elif defined(SOLARIS)
1343     tty->print  ("/usr/bin/sh -c ");
1344 #endif
1345     tty->print_cr("\"%s\"...", cmd);
1346 
1347     if (os::fork_and_exec(cmd) < 0) {
1348       tty->print_cr("os::fork_and_exec failed: %s (%d)", strerror(errno), errno);
1349     }
1350   }
1351 }
1352 
1353 void VMError::report_java_out_of_memory(const char* message) {
1354   if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
1355     MutexLocker ml(Heap_lock);
1356     VM_ReportJavaOutOfMemory op(message);
1357     VMThread::execute(&op);
1358   }
1359 }
1360 
1361 void VMError::show_message_box(char *buf, int buflen) {
1362   bool yes;
1363   do {
1364     error_string(buf, buflen);
1365     yes = os::start_debugging(buf,buflen);
1366   } while (yes);
1367 }