1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/os/aix/vm/vmError_aix.cpp Wed Apr 27 01:25:04 2016 +0800 1.3 @@ -0,0 +1,122 @@ 1.4 +/* 1.5 + * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + * 1.26 + */ 1.27 + 1.28 +#include "precompiled.hpp" 1.29 +#include "runtime/arguments.hpp" 1.30 +#include "runtime/os.hpp" 1.31 +#include "runtime/thread.hpp" 1.32 +#include "utilities/vmError.hpp" 1.33 + 1.34 +#include <sys/types.h> 1.35 +#include <sys/wait.h> 1.36 +#include <unistd.h> 1.37 +#include <signal.h> 1.38 + 1.39 +void VMError::show_message_box(char *buf, int buflen) { 1.40 + bool yes; 1.41 + do { 1.42 + error_string(buf, buflen); 1.43 + int len = (int)strlen(buf); 1.44 + char *p = &buf[len]; 1.45 + 1.46 + jio_snprintf(p, buflen - len, 1.47 + "\n\n" 1.48 + "Do you want to debug the problem?\n\n" 1.49 + "To debug, run 'dbx -a %d'; then switch to thread tid " INTX_FORMAT ", k-tid " INTX_FORMAT "\n" 1.50 + "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n" 1.51 + "Otherwise, press RETURN to abort...", 1.52 + os::current_process_id(), 1.53 + os::current_thread_id(), thread_self()); 1.54 + 1.55 + yes = os::message_box("Unexpected Error", buf); 1.56 + 1.57 + if (yes) { 1.58 + // yes, user asked VM to launch debugger 1.59 + jio_snprintf(buf, buflen, "dbx -a %d", os::current_process_id()); 1.60 + 1.61 + os::fork_and_exec(buf); 1.62 + yes = false; 1.63 + } 1.64 + } while (yes); 1.65 +} 1.66 + 1.67 +// Handle all synchronous signals which may happen during signal handling, 1.68 +// not just SIGSEGV and SIGBUS. 1.69 +static const int SIGNALS[] = { SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP }; // add more if needed 1.70 +static const int NUM_SIGNALS = sizeof(SIGNALS) / sizeof(int); 1.71 + 1.72 +// Space for our "saved" signal flags and handlers 1.73 +static int resettedSigflags[NUM_SIGNALS]; 1.74 +static address resettedSighandler[NUM_SIGNALS]; 1.75 + 1.76 +static void save_signal(int idx, int sig) { 1.77 + struct sigaction sa; 1.78 + sigaction(sig, NULL, &sa); 1.79 + resettedSigflags[idx] = sa.sa_flags; 1.80 + resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO) 1.81 + ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 1.82 + : CAST_FROM_FN_PTR(address, sa.sa_handler); 1.83 +} 1.84 + 1.85 +int VMError::get_resetted_sigflags(int sig) { 1.86 + // Handle all program errors. 1.87 + for (int i = 0; i < NUM_SIGNALS; i++) { 1.88 + if (SIGNALS[i] == sig) { 1.89 + return resettedSigflags[i]; 1.90 + } 1.91 + } 1.92 + return -1; 1.93 +} 1.94 + 1.95 +address VMError::get_resetted_sighandler(int sig) { 1.96 + // Handle all program errors. 1.97 + for (int i = 0; i < NUM_SIGNALS; i++) { 1.98 + if (SIGNALS[i] == sig) { 1.99 + return resettedSighandler[i]; 1.100 + } 1.101 + } 1.102 + return NULL; 1.103 +} 1.104 + 1.105 +static void crash_handler(int sig, siginfo_t* info, void* ucVoid) { 1.106 + // Unmask current signal. 1.107 + sigset_t newset; 1.108 + sigemptyset(&newset); 1.109 + sigaddset(&newset, sig); 1.110 + 1.111 + Unimplemented(); 1.112 +} 1.113 + 1.114 +void VMError::reset_signal_handlers() { 1.115 + sigset_t newset; 1.116 + sigemptyset(&newset); 1.117 + 1.118 + for (int i = 0; i < NUM_SIGNALS; i++) { 1.119 + save_signal(i, SIGNALS[i]); 1.120 + os::signal(SIGNALS[i], CAST_FROM_FN_PTR(void *, crash_handler)); 1.121 + sigaddset(&newset, SIGNALS[i]); 1.122 + } 1.123 + 1.124 + sigthreadmask(SIG_UNBLOCK, &newset, NULL); 1.125 +}