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

6541756: Reduce executable C-heap
Summary: Add executable parameters to reserve_memory and commit_memory to reduce executable memory to only the Code Heap.
Reviewed-by: xlu, kvn, acorn

     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_solaris.cpp.incl"

    28 #include <sys/types.h>

    29 #include <sys/wait.h>

    30 #include <signal.h>

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

    33   bool yes;

    34   do {

    35     error_string(buf, buflen);

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

    37     char *p = &buf[len];

    39     jio_snprintf(p, buflen - len,

    40                "\n\n"

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

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

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

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

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

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

    49     if (yes) {

    50       // yes, user asked VM to launch debugger

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

    53       os::fork_and_exec(buf);

    54       yes = false;

    55     }

    56   } while (yes);

    57 }

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

    60 static int resettedSigflags[2];

    61 static address resettedSighandler[2];

    63 static void save_signal(int idx, int sig)

    64 {

    65   struct sigaction sa;

    66   sigaction(sig, NULL, &sa);

    67   resettedSigflags[idx]   = sa.sa_flags;

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

    69                               ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)

    70                               : CAST_FROM_FN_PTR(address, sa.sa_handler);

    71 }

    73 int VMError::get_resetted_sigflags(int sig) {

    74   if(SIGSEGV == sig) {

    75     return resettedSigflags[0];

    76   } else if(SIGBUS == sig) {

    77     return resettedSigflags[1];

    78   }

    79   return -1;

    80 }

    82 address VMError::get_resetted_sighandler(int sig) {

    83   if(SIGSEGV == sig) {

    84     return resettedSighandler[0];

    85   } else if(SIGBUS == sig) {

    86     return resettedSighandler[1];

    87   }

    88   return NULL;

    89 }

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

    92   // unmask current signal

    93   sigset_t newset;

    94   sigemptyset(&newset);

    95   sigaddset(&newset, sig);

    96   sigprocmask(SIG_UNBLOCK, &newset, NULL);

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

    99   err.report_and_die();

   100 }

   102 void VMError::reset_signal_handlers() {

   103   // Save sigflags for resetted signals

   104   save_signal(0, SIGSEGV);

   105   save_signal(1, SIGBUS);

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

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

   108 }

src/os/solaris/vm/vmError_solaris.cpp@6bdd6923ba16

src/os/solaris/vm/vmError_solaris.cpp

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

src/os/solaris/vm/vmError_solaris.cpp@6bdd6923ba16

src/os/solaris/vm/vmError_solaris.cpp