1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os/aix/vm/jvm_aix.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,201 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright 2012, 2013 SAP AG. All rights reserved.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + *
1.27 + */
1.28 +
1.29 +#include "precompiled.hpp"
1.30 +#include "prims/jvm.h"
1.31 +#include "runtime/interfaceSupport.hpp"
1.32 +#include "runtime/osThread.hpp"
1.33 +
1.34 +#include <signal.h>
1.35 +
1.36 +
1.37 +// sun.misc.Signal ///////////////////////////////////////////////////////////
1.38 +// Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
1.39 +/*
1.40 + * This function is included primarily as a debugging aid. If Java is
1.41 + * running in a console window, then pressing <CTRL-\\> will cause
1.42 + * the current state of all active threads and monitors to be written
1.43 + * to the console window.
1.44 + */
1.45 +
1.46 +JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
1.47 + // Copied from classic vm
1.48 + // signals_md.c 1.4 98/08/23
1.49 + void* newHandler = handler == (void *)2
1.50 + ? os::user_handler()
1.51 + : handler;
1.52 + switch (sig) {
1.53 + /* The following are already used by the VM. */
1.54 + case INTERRUPT_SIGNAL:
1.55 + case SIGFPE:
1.56 + case SIGILL:
1.57 + case SIGSEGV:
1.58 +
1.59 + /* The following signal is used by the VM to dump thread stacks unless
1.60 + ReduceSignalUsage is set, in which case the user is allowed to set
1.61 + his own _native_ handler for this signal; thus, in either case,
1.62 + we do not allow JVM_RegisterSignal to change the handler. */
1.63 + case BREAK_SIGNAL:
1.64 + return (void *)-1;
1.65 +
1.66 + /* The following signals are used for Shutdown Hooks support. However, if
1.67 + ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
1.68 + System.exit(), Java is not allowed to use these signals, and the the
1.69 + user is allowed to set his own _native_ handler for these signals and
1.70 + invoke System.exit() as needed. Terminator.setup() is avoiding
1.71 + registration of these signals when -Xrs is present.
1.72 + - If the HUP signal is ignored (from the nohup) command, then Java
1.73 + is not allowed to use this signal.
1.74 + */
1.75 +
1.76 + case SHUTDOWN1_SIGNAL:
1.77 + case SHUTDOWN2_SIGNAL:
1.78 + case SHUTDOWN3_SIGNAL:
1.79 + if (ReduceSignalUsage) return (void*)-1;
1.80 + if (os::Aix::is_sig_ignored(sig)) return (void*)1;
1.81 + }
1.82 +
1.83 + void* oldHandler = os::signal(sig, newHandler);
1.84 + if (oldHandler == os::user_handler()) {
1.85 + return (void *)2;
1.86 + } else {
1.87 + return oldHandler;
1.88 + }
1.89 +JVM_END
1.90 +
1.91 +
1.92 +JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig))
1.93 + if (ReduceSignalUsage) {
1.94 + // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL,
1.95 + // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since
1.96 + // no handler for them is actually registered in JVM or via
1.97 + // JVM_RegisterSignal.
1.98 + if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
1.99 + sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) {
1.100 + return JNI_FALSE;
1.101 + }
1.102 + }
1.103 + else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
1.104 + sig == SHUTDOWN3_SIGNAL) && os::Aix::is_sig_ignored(sig)) {
1.105 + // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL
1.106 + // is ignored, since no handler for them is actually registered in JVM
1.107 + // or via JVM_RegisterSignal.
1.108 + // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL
1.109 + return JNI_FALSE;
1.110 + }
1.111 +
1.112 + os::signal_raise(sig);
1.113 + return JNI_TRUE;
1.114 +JVM_END
1.115 +
1.116 +/*
1.117 + All the defined signal names for Linux.
1.118 +
1.119 + NOTE that not all of these names are accepted by our Java implementation
1.120 +
1.121 + Via an existing claim by the VM, sigaction restrictions, or
1.122 + the "rules of Unix" some of these names will be rejected at runtime.
1.123 + For example the VM sets up to handle USR1, sigaction returns EINVAL for
1.124 + STOP, and Linux simply doesn't allow catching of KILL.
1.125 +
1.126 + Here are the names currently accepted by a user of sun.misc.Signal with
1.127 + 1.4.1 (ignoring potential interaction with use of chaining, etc):
1.128 +
1.129 + HUP, INT, TRAP, ABRT, IOT, BUS, USR2, PIPE, ALRM, TERM, STKFLT,
1.130 + CLD, CHLD, CONT, TSTP, TTIN, TTOU, URG, XCPU, XFSZ, VTALRM, PROF,
1.131 + WINCH, POLL, IO, PWR, SYS
1.132 +
1.133 +*/
1.134 +
1.135 +struct siglabel {
1.136 + const char *name;
1.137 + int number;
1.138 +};
1.139 +
1.140 +struct siglabel siglabels[] = {
1.141 + /* derived from /usr/include/bits/signum.h on RH7.2 */
1.142 + "HUP", SIGHUP, /* Hangup (POSIX). */
1.143 + "INT", SIGINT, /* Interrupt (ANSI). */
1.144 + "QUIT", SIGQUIT, /* Quit (POSIX). */
1.145 + "ILL", SIGILL, /* Illegal instruction (ANSI). */
1.146 + "TRAP", SIGTRAP, /* Trace trap (POSIX). */
1.147 + "ABRT", SIGABRT, /* Abort (ANSI). */
1.148 + "IOT", SIGIOT, /* IOT trap (4.2 BSD). */
1.149 + "BUS", SIGBUS, /* BUS error (4.2 BSD). */
1.150 + "FPE", SIGFPE, /* Floating-point exception (ANSI). */
1.151 + "KILL", SIGKILL, /* Kill, unblockable (POSIX). */
1.152 + "USR1", SIGUSR1, /* User-defined signal 1 (POSIX). */
1.153 + "SEGV", SIGSEGV, /* Segmentation violation (ANSI). */
1.154 + "USR2", SIGUSR2, /* User-defined signal 2 (POSIX). */
1.155 + "PIPE", SIGPIPE, /* Broken pipe (POSIX). */
1.156 + "ALRM", SIGALRM, /* Alarm clock (POSIX). */
1.157 + "TERM", SIGTERM, /* Termination (ANSI). */
1.158 +#ifdef SIGSTKFLT
1.159 + "STKFLT", SIGSTKFLT, /* Stack fault. */
1.160 +#endif
1.161 + "CLD", SIGCLD, /* Same as SIGCHLD (System V). */
1.162 + "CHLD", SIGCHLD, /* Child status has changed (POSIX). */
1.163 + "CONT", SIGCONT, /* Continue (POSIX). */
1.164 + "STOP", SIGSTOP, /* Stop, unblockable (POSIX). */
1.165 + "TSTP", SIGTSTP, /* Keyboard stop (POSIX). */
1.166 + "TTIN", SIGTTIN, /* Background read from tty (POSIX). */
1.167 + "TTOU", SIGTTOU, /* Background write to tty (POSIX). */
1.168 + "URG", SIGURG, /* Urgent condition on socket (4.2 BSD). */
1.169 + "XCPU", SIGXCPU, /* CPU limit exceeded (4.2 BSD). */
1.170 + "XFSZ", SIGXFSZ, /* File size limit exceeded (4.2 BSD). */
1.171 + "DANGER", SIGDANGER, /* System crash imminent; free up some page space (AIX). */
1.172 + "VTALRM", SIGVTALRM, /* Virtual alarm clock (4.2 BSD). */
1.173 + "PROF", SIGPROF, /* Profiling alarm clock (4.2 BSD). */
1.174 + "WINCH", SIGWINCH, /* Window size change (4.3 BSD, Sun). */
1.175 + "POLL", SIGPOLL, /* Pollable event occurred (System V). */
1.176 + "IO", SIGIO, /* I/O now possible (4.2 BSD). */
1.177 + "PWR", SIGPWR, /* Power failure restart (System V). */
1.178 +#ifdef SIGSYS
1.179 + "SYS", SIGSYS /* Bad system call. Only on some Linuxen! */
1.180 +#endif
1.181 + };
1.182 +
1.183 +JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
1.184 +
1.185 + /* find and return the named signal's number */
1.186 +
1.187 + for(uint i=0; i<ARRAY_SIZE(siglabels); i++)
1.188 + if(!strcmp(name, siglabels[i].name))
1.189 + return siglabels[i].number;
1.190 +
1.191 + return -1;
1.192 +
1.193 +JVM_END
1.194 +
1.195 +// used by os::exception_name()
1.196 +extern bool signal_name(int signo, char* buf, size_t len) {
1.197 + for(uint i = 0; i < ARRAY_SIZE(siglabels); i++) {
1.198 + if (signo == siglabels[i].number) {
1.199 + jio_snprintf(buf, len, "SIG%s", siglabels[i].name);
1.200 + return true;
1.201 + }
1.202 + }
1.203 + return false;
1.204 +}
