1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os/solaris/vm/jvm_solaris.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,148 @@
1.4 +/*
1.5 + * Copyright 1998-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "incls/_precompiled.incl"
1.29 +#include "incls/_jvm_solaris.cpp.incl"
1.30 +
1.31 +#include <signal.h>
1.32 +
1.33 +// sun.misc.Signal ///////////////////////////////////////////////////////////
1.34 +// Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
1.35 +/*
1.36 + * This function is included primarily as a debugging aid. If Java is
1.37 + * running in a console window, then pressing <CTRL-\\> will cause
1.38 + * the current state of all active threads and monitors to be written
1.39 + * to the console window.
1.40 + */
1.41 +
1.42 +JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
1.43 + // Copied from classic vm
1.44 + // signals_md.c 1.4 98/08/23
1.45 + void* newHandler = handler == (void *)2
1.46 + ? os::user_handler()
1.47 + : handler;
1.48 + switch (sig) {
1.49 + /* The following are already used by the VM. */
1.50 + case SIGFPE:
1.51 + case SIGILL:
1.52 + case SIGSEGV:
1.53 +
1.54 + /* The following signal is used by the VM to dump thread stacks unless
1.55 + ReduceSignalUsage is set, in which case the user is allowed to set
1.56 + his own _native_ handler for this signal; thus, in either case,
1.57 + we do not allow JVM_RegisterSignal to change the handler. */
1.58 + case BREAK_SIGNAL:
1.59 + return (void *)-1;
1.60 +
1.61 + /* The following signals are used for Shutdown Hooks support. However, if
1.62 + ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
1.63 + System.exit(), Java is not allowed to use these signals, and the the
1.64 + user is allowed to set his own _native_ handler for these signals and
1.65 + invoke System.exit() as needed. Terminator.setup() is avoiding
1.66 + registration of these signals when -Xrs is present.
1.67 + - If the HUP signal is ignored (from the nohup) command, then Java
1.68 + is not allowed to use this signal.
1.69 + */
1.70 + case SHUTDOWN1_SIGNAL:
1.71 + case SHUTDOWN2_SIGNAL:
1.72 + case SHUTDOWN3_SIGNAL:
1.73 + if (ReduceSignalUsage) return (void*)-1;
1.74 + if (os::Solaris::is_sig_ignored(sig)) return (void*)1;
1.75 + }
1.76 +
1.77 + /* Check parameterized signals. Don't allow sharing of our interrupt signal */
1.78 + if (sig == os::Solaris::SIGinterrupt()) {
1.79 + return (void *)-1;
1.80 + }
1.81 +
1.82 + void* oldHandler = os::signal(sig, newHandler);
1.83 + if (oldHandler == os::user_handler()) {
1.84 + return (void *)2;
1.85 + } else {
1.86 + return oldHandler;
1.87 + }
1.88 +JVM_END
1.89 +
1.90 +
1.91 +JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig))
1.92 + if (ReduceSignalUsage) {
1.93 + // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL,
1.94 + // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since
1.95 + // no handler for them is actually registered in JVM or via
1.96 + // JVM_RegisterSignal.
1.97 + if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
1.98 + sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) {
1.99 + return JNI_FALSE;
1.100 + }
1.101 + }
1.102 + else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
1.103 + sig == SHUTDOWN3_SIGNAL) && os::Solaris::is_sig_ignored(sig)) {
1.104 + // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL
1.105 + // is ignored, since no handler for them is actually registered in JVM
1.106 + // or via JVM_RegisterSignal.
1.107 + // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL
1.108 + return JNI_FALSE;
1.109 + }
1.110 +
1.111 + os::signal_raise(sig);
1.112 + return JNI_TRUE;
1.113 +JVM_END
1.114 +
1.115 +
1.116 +/*
1.117 + All the defined signal names for Solaris are defined by str2sig().
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 + CANCEL, and Solaris 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, IOT, ABRT, EMT, BUS, SYS, PIPE, ALRM, TERM, USR2,
1.130 + CLD, CHLD, PWR, WINCH, URG, POLL, IO, TSTP, CONT, TTIN, TTOU, VTALRM,
1.131 + PROF, XCPU, XFSZ, FREEZE, THAW, LOST
1.132 +*/
1.133 +
1.134 +JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
1.135 +
1.136 + int sig;
1.137 +
1.138 + /* return the named signal's number */
1.139 +
1.140 + if(str2sig(name, &sig))
1.141 + return -1;
1.142 + else
1.143 + return sig;
1.144 +
1.145 +JVM_END
1.146 +
1.147 +
1.148 +//Reconciliation History
1.149 +// 1.4 98/10/07 13:39:41 jvm_win32.cpp
1.150 +// 1.6 99/06/22 16:39:00 jvm_win32.cpp
1.151 +//End
