Mercurial > hg > truffle
view src/os/bsd/vm/vmError_bsd.cpp @ 20295:3f2894c5052e
8048112: G1 Full GC needs to support the case when the very first region is not available
Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett.
Reviewed-by: brutisso
author | tschatzl |
---|---|
date | Mon, 21 Jul 2014 10:00:31 +0200 |
parents | f08d439fab8c |
children |
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/* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "runtime/arguments.hpp" #include "runtime/os.hpp" #include "runtime/thread.hpp" #include "utilities/vmError.hpp" #include <sys/types.h> #include <sys/wait.h> #include <sys/syscall.h> #include <unistd.h> #include <signal.h> void VMError::show_message_box(char *buf, int buflen) { bool yes; do { error_string(buf, buflen); int len = (int)strlen(buf); char *p = &buf[len]; jio_snprintf(p, buflen - len, "\n\n" "Do you want to debug the problem?\n\n" "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " INTX_FORMAT " (" INTPTR_FORMAT ")\n" "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n" "Otherwise, press RETURN to abort...", os::current_process_id(), os::current_process_id(), os::current_thread_id(), os::current_thread_id()); yes = os::message_box("Unexpected Error", buf); if (yes) { // yes, user asked VM to launch debugger jio_snprintf(buf, buflen, "gdb /proc/%d/exe %d", os::current_process_id(), os::current_process_id()); os::fork_and_exec(buf); yes = false; } } while (yes); } // Space for our "saved" signal flags and handlers static int resettedSigflags[2]; static address resettedSighandler[2]; static void save_signal(int idx, int sig) { struct sigaction sa; sigaction(sig, NULL, &sa); resettedSigflags[idx] = sa.sa_flags; resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO) ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) : CAST_FROM_FN_PTR(address, sa.sa_handler); } int VMError::get_resetted_sigflags(int sig) { if(SIGSEGV == sig) { return resettedSigflags[0]; } else if(SIGBUS == sig) { return resettedSigflags[1]; } return -1; } address VMError::get_resetted_sighandler(int sig) { if(SIGSEGV == sig) { return resettedSighandler[0]; } else if(SIGBUS == sig) { return resettedSighandler[1]; } return NULL; } static void crash_handler(int sig, siginfo_t* info, void* ucVoid) { // unmask current signal sigset_t newset; sigemptyset(&newset); sigaddset(&newset, sig); sigprocmask(SIG_UNBLOCK, &newset, NULL); VMError err(NULL, sig, NULL, info, ucVoid); err.report_and_die(); } void VMError::reset_signal_handlers() { // Save sigflags for resetted signals save_signal(0, SIGSEGV); save_signal(1, SIGBUS); os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler)); os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler)); }