Mercurial > hg > truffle
diff src/os/bsd/vm/vmError_bsd.cpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os/bsd/vm/vmError_bsd.cpp Sun Sep 25 16:03:29 2011 -0700 @@ -0,0 +1,115 @@ +/* + * 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)); +}