jdk8-mips64-public/hotspot: src/os/solaris/vm/vmError

     1 /*

     2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "runtime/arguments.hpp"

    27 #include "runtime/os.hpp"

    28 #include "runtime/thread.hpp"

    29 #include "utilities/vmError.hpp"

    31 #include <sys/types.h>

    32 #include <sys/wait.h>

    33 #include <signal.h>

    35 void VMError::show_message_box(char *buf, int buflen) {

    36   bool yes;

    37   do {

    38     error_string(buf, buflen);

    39     int len = (int)strlen(buf);

    40     char *p = &buf[len];

    42     jio_snprintf(p, buflen - len,

    43                "\n\n"

    44                "Do you want to debug the problem?\n\n"

    45                "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n"

    46                "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n"

    47                "Otherwise, press RETURN to abort...",

    48                os::current_process_id(), os::current_thread_id());

    50     yes = os::message_box("Unexpected Error", buf);

    52     if (yes) {

    53       // yes, user asked VM to launch debugger

    54       jio_snprintf(buf, buflen, "dbx - %d", os::current_process_id());

    56       os::fork_and_exec(buf);

    57       yes = false;

    58     }

    59   } while (yes);

    60 }

    62 // Space for our "saved" signal flags and handlers

    63 static int resettedSigflags[2];

    64 static address resettedSighandler[2];

    66 static void save_signal(int idx, int sig)

    67 {

    68   struct sigaction sa;

    69   sigaction(sig, NULL, &sa);

    70   resettedSigflags[idx]   = sa.sa_flags;

    71   resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO)

    72                               ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)

    73                               : CAST_FROM_FN_PTR(address, sa.sa_handler);

    74 }

    76 int VMError::get_resetted_sigflags(int sig) {

    77   if(SIGSEGV == sig) {

    78     return resettedSigflags[0];

    79   } else if(SIGBUS == sig) {

    80     return resettedSigflags[1];

    81   }

    82   return -1;

    83 }

    85 address VMError::get_resetted_sighandler(int sig) {

    86   if(SIGSEGV == sig) {

    87     return resettedSighandler[0];

    88   } else if(SIGBUS == sig) {

    89     return resettedSighandler[1];

    90   }

    91   return NULL;

    92 }

    94 static void crash_handler(int sig, siginfo_t* info, void* ucVoid) {

    95   // unmask current signal

    96   sigset_t newset;

    97   sigemptyset(&newset);

    98   sigaddset(&newset, sig);

    99   sigprocmask(SIG_UNBLOCK, &newset, NULL);

   101   VMError err(NULL, sig, NULL, info, ucVoid);

   102   err.report_and_die();

   103 }

   105 void VMError::reset_signal_handlers() {

   106   // Save sigflags for resetted signals

   107   save_signal(0, SIGSEGV);

   108   save_signal(1, SIGBUS);

   109   os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler));

   110   os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler));

   111 }

src/os/solaris/vm/vmError_solaris.cpp@f73af4455d7d