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

     1 /*

     2  * Copyright 2003-2006 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  */

    25 # include "incls/_precompiled.incl"

    26 # include "incls/_vmError_linux.cpp.incl"

    28 #include <sys/types.h>

    29 #include <sys/wait.h>

    30 #include <sys/syscall.h>

    31 #include <unistd.h>

    32 #include <signal.h>

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

    35   bool yes;

    36   do {

    37     error_string(buf, buflen);

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

    39     char *p = &buf[len];

    41     jio_snprintf(p, buflen - len,

    42                "\n\n"

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

    44                "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " INTX_FORMAT "\n"

    45                "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n"

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

    47                os::current_process_id(), os::current_process_id(),

    48                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, "gdb /proc/%d/exe %d",

    55                    os::current_process_id(), os::current_process_id());

    57       os::fork_and_exec(buf);

    58       yes = false;

    59     }

    60   } while (yes);

    61 }

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

    64 static int resettedSigflags[2];

    65 static address resettedSighandler[2];

    67 static void save_signal(int idx, int sig)

    68 {

    69   struct sigaction sa;

    70   sigaction(sig, NULL, &sa);

    71   resettedSigflags[idx]   = sa.sa_flags;

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

    73                               ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)

    74                               : CAST_FROM_FN_PTR(address, sa.sa_handler);

    75 }

    77 int VMError::get_resetted_sigflags(int sig) {

    78   if(SIGSEGV == sig) {

    79     return resettedSigflags[0];

    80   } else if(SIGBUS == sig) {

    81     return resettedSigflags[1];

    82   }

    83   return -1;

    84 }

    86 address VMError::get_resetted_sighandler(int sig) {

    87   if(SIGSEGV == sig) {

    88     return resettedSighandler[0];

    89   } else if(SIGBUS == sig) {

    90     return resettedSighandler[1];

    91   }

    92   return NULL;

    93 }

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

    96   // unmask current signal

    97   sigset_t newset;

    98   sigemptyset(&newset);

    99   sigaddset(&newset, sig);

   100   sigprocmask(SIG_UNBLOCK, &newset, NULL);

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

   103   err.report_and_die();

   104 }

   106 void VMError::reset_signal_handlers() {

   107   // Save sigflags for resetted signals

   108   save_signal(0, SIGSEGV);

   109   save_signal(1, SIGBUS);

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

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

   112 }

src/os/linux/vm/vmError_linux.cpp@9c2ecc2ffb12