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

8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
Summary: Use SA_ONSTACK flag to ensure signal gets delivered properly.
Reviewed-by: dholmes, coleenp
Contributed-by: gerard.ziemski@oracle.com

     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 <sys/syscall.h>

    34 #include <unistd.h>

    35 #include <signal.h>

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

    38   bool yes;

    39   do {

    40     error_string(buf, buflen);

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

    42     char *p = &buf[len];

    44     jio_snprintf(p, buflen - len,

    45                "\n\n"

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

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

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

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

    50                os::current_process_id(), os::current_process_id(),

    51                os::current_thread_id(), os::current_thread_id());

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

    55     if (yes) {

    56       // yes, user asked VM to launch debugger

    57       jio_snprintf(buf, buflen, "gdb /proc/%d/exe %d",

    58                    os::current_process_id(), os::current_process_id());

    60       os::fork_and_exec(buf);

    61       yes = false;

    62     }

    63   } while (yes);

    64 }

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

    67 static int resettedSigflags[2];

    68 static address resettedSighandler[2];

    70 static void save_signal(int idx, int sig)

    71 {

    72   struct sigaction sa;

    73   sigaction(sig, NULL, &sa);

    74   resettedSigflags[idx]   = sa.sa_flags;

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

    76                               ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)

    77                               : CAST_FROM_FN_PTR(address, sa.sa_handler);

    78 }

    80 int VMError::get_resetted_sigflags(int sig) {

    81   if(SIGSEGV == sig) {

    82     return resettedSigflags[0];

    83   } else if(SIGBUS == sig) {

    84     return resettedSigflags[1];

    85   }

    86   return -1;

    87 }

    89 address VMError::get_resetted_sighandler(int sig) {

    90   if(SIGSEGV == sig) {

    91     return resettedSighandler[0];

    92   } else if(SIGBUS == sig) {

    93     return resettedSighandler[1];

    94   }

    95   return NULL;

    96 }

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

    99   // unmask current signal

   100   sigset_t newset;

   101   sigemptyset(&newset);

   102   sigaddset(&newset, sig);

   103   sigprocmask(SIG_UNBLOCK, &newset, NULL);

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

   106   err.report_and_die();

   107 }

   109 void VMError::reset_signal_handlers() {

   110   // Save sigflags for resetted signals

   111   save_signal(0, SIGSEGV);

   112   save_signal(1, SIGBUS);

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

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

   115 }

src/os/bsd/vm/vmError_bsd.cpp@6bf8b8bb7c19

src/os/bsd/vm/vmError_bsd.cpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/os/bsd/vm/vmError_bsd.cpp@6bf8b8bb7c19

src/os/bsd/vm/vmError_bsd.cpp