1 /*
2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
30 #include <signal.h>
31
32
33 // sun.misc.Signal ///////////////////////////////////////////////////////////
34 // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
35 /*
36 * This function is included primarily as a debugging aid. If Java is
37 * running in a console window, then pressing <CTRL-\\> will cause
38 * the current state of all active threads and monitors to be written
39 * to the console window.
40 */
41
42 JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
43 // Copied from classic vm
44 // signals_md.c 1.4 98/08/23
45 void* newHandler = handler == (void *)2
46 ? os::user_handler()
47 : handler;
48 switch (sig) {
49 /* The following are already used by the VM. */
50 case INTERRUPT_SIGNAL:
51 case SIGFPE:
52 case SIGILL:
53 case SIGSEGV:
54
55 /* The following signal is used by the VM to dump thread stacks unless
56 ReduceSignalUsage is set, in which case the user is allowed to set
57 his own _native_ handler for this signal; thus, in either case,
58 we do not allow JVM_RegisterSignal to change the handler. */
59 case BREAK_SIGNAL:
60 return (void *)-1;
61
62 /* The following signals are used for Shutdown Hooks support. However, if
63 ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
64 System.exit(), Java is not allowed to use these signals, and the the
65 user is allowed to set his own _native_ handler for these signals and
66 invoke System.exit() as needed. Terminator.setup() is avoiding
67 registration of these signals when -Xrs is present.
68 - If the HUP signal is ignored (from the nohup) command, then Java
69 is not allowed to use this signal.
70 */
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1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
30 #include <signal.h>
31
32
33 // sun.misc.Signal ///////////////////////////////////////////////////////////
34 // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
35 /*
36 * This function is included primarily as a debugging aid. If Java is
37 * running in a console window, then pressing <CTRL-\\> will cause
38 * the current state of all active threads and monitors to be written
39 * to the console window.
40 */
41
42 JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
43 // Copied from classic vm
44 // signals_md.c 1.4 98/08/23
45 void* newHandler = handler == (void *)2
46 ? os::user_handler()
47 : handler;
48 switch (sig) {
49 /* The following are already used by the VM. */
50 case SIGFPE:
51 case SIGILL:
52 case SIGSEGV:
53
54 /* The following signal is used by the VM to dump thread stacks unless
55 ReduceSignalUsage is set, in which case the user is allowed to set
56 his own _native_ handler for this signal; thus, in either case,
57 we do not allow JVM_RegisterSignal to change the handler. */
58 case BREAK_SIGNAL:
59 return (void *)-1;
60
61 /* The following signals are used for Shutdown Hooks support. However, if
62 ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
63 System.exit(), Java is not allowed to use these signals, and the the
64 user is allowed to set his own _native_ handler for these signals and
65 invoke System.exit() as needed. Terminator.setup() is avoiding
66 registration of these signals when -Xrs is present.
67 - If the HUP signal is ignored (from the nohup) command, then Java
68 is not allowed to use this signal.
69 */
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