7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "prims/jvm.h"
28 #include "runtime/interfaceSupport.hpp"
29 #include "runtime/osThread.hpp"
30
31 #include <signal.h>
32
33
34 // sun.misc.Signal ///////////////////////////////////////////////////////////
35 // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
36 /*
37 * This function is included primarily as a debugging aid. If Java is
38 * running in a console window, then pressing <CTRL-\\> will cause
39 * the current state of all active threads and monitors to be written
40 * to the console window.
41 */
42
43 JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
44 // Copied from classic vm
45 // signals_md.c 1.4 98/08/23
46 void* newHandler = handler == (void *)2
92 // no handler for them is actually registered in JVM or via
93 // JVM_RegisterSignal.
94 if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
95 sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) {
96 return JNI_FALSE;
97 }
98 }
99 else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
100 sig == SHUTDOWN3_SIGNAL) && os::Aix::is_sig_ignored(sig)) {
101 // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL
102 // is ignored, since no handler for them is actually registered in JVM
103 // or via JVM_RegisterSignal.
104 // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL
105 return JNI_FALSE;
106 }
107
108 os::signal_raise(sig);
109 return JNI_TRUE;
110 JVM_END
111
112 /*
113 All the defined signal names for Linux.
114
115 NOTE that not all of these names are accepted by our Java implementation
116
117 Via an existing claim by the VM, sigaction restrictions, or
118 the "rules of Unix" some of these names will be rejected at runtime.
119 For example the VM sets up to handle USR1, sigaction returns EINVAL for
120 STOP, and Linux simply doesn't allow catching of KILL.
121
122 Here are the names currently accepted by a user of sun.misc.Signal with
123 1.4.1 (ignoring potential interaction with use of chaining, etc):
124
125 HUP, INT, TRAP, ABRT, IOT, BUS, USR2, PIPE, ALRM, TERM, STKFLT,
126 CLD, CHLD, CONT, TSTP, TTIN, TTOU, URG, XCPU, XFSZ, VTALRM, PROF,
127 WINCH, POLL, IO, PWR, SYS
128
129 */
130
131 struct siglabel {
132 const char *name;
133 int number;
134 };
135
136 struct siglabel siglabels[] = {
137 /* derived from /usr/include/bits/signum.h on RH7.2 */
138 "HUP", SIGHUP, /* Hangup (POSIX). */
139 "INT", SIGINT, /* Interrupt (ANSI). */
140 "QUIT", SIGQUIT, /* Quit (POSIX). */
141 "ILL", SIGILL, /* Illegal instruction (ANSI). */
142 "TRAP", SIGTRAP, /* Trace trap (POSIX). */
143 "ABRT", SIGABRT, /* Abort (ANSI). */
144 "IOT", SIGIOT, /* IOT trap (4.2 BSD). */
145 "BUS", SIGBUS, /* BUS error (4.2 BSD). */
146 "FPE", SIGFPE, /* Floating-point exception (ANSI). */
147 "KILL", SIGKILL, /* Kill, unblockable (POSIX). */
148 "USR1", SIGUSR1, /* User-defined signal 1 (POSIX). */
149 "SEGV", SIGSEGV, /* Segmentation violation (ANSI). */
150 "USR2", SIGUSR2, /* User-defined signal 2 (POSIX). */
151 "PIPE", SIGPIPE, /* Broken pipe (POSIX). */
152 "ALRM", SIGALRM, /* Alarm clock (POSIX). */
153 "TERM", SIGTERM, /* Termination (ANSI). */
154 #ifdef SIGSTKFLT
155 "STKFLT", SIGSTKFLT, /* Stack fault. */
156 #endif
157 "CLD", SIGCLD, /* Same as SIGCHLD (System V). */
158 "CHLD", SIGCHLD, /* Child status has changed (POSIX). */
159 "CONT", SIGCONT, /* Continue (POSIX). */
160 "STOP", SIGSTOP, /* Stop, unblockable (POSIX). */
161 "TSTP", SIGTSTP, /* Keyboard stop (POSIX). */
162 "TTIN", SIGTTIN, /* Background read from tty (POSIX). */
163 "TTOU", SIGTTOU, /* Background write to tty (POSIX). */
164 "URG", SIGURG, /* Urgent condition on socket (4.2 BSD). */
165 "XCPU", SIGXCPU, /* CPU limit exceeded (4.2 BSD). */
166 "XFSZ", SIGXFSZ, /* File size limit exceeded (4.2 BSD). */
167 "DANGER", SIGDANGER, /* System crash imminent; free up some page space (AIX). */
168 "VTALRM", SIGVTALRM, /* Virtual alarm clock (4.2 BSD). */
169 "PROF", SIGPROF, /* Profiling alarm clock (4.2 BSD). */
170 "WINCH", SIGWINCH, /* Window size change (4.3 BSD, Sun). */
171 "POLL", SIGPOLL, /* Pollable event occurred (System V). */
172 "IO", SIGIO, /* I/O now possible (4.2 BSD). */
173 "PWR", SIGPWR, /* Power failure restart (System V). */
174 #ifdef SIGSYS
175 "SYS", SIGSYS /* Bad system call. Only on some Linuxen! */
176 #endif
177 };
178
179 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
180
181 /* find and return the named signal's number */
182
183 for(uint i=0; i<ARRAY_SIZE(siglabels); i++)
184 if(!strcmp(name, siglabels[i].name))
185 return siglabels[i].number;
186
187 return -1;
188
189 JVM_END
190
191 // used by os::exception_name()
192 extern bool signal_name(int signo, char* buf, size_t len) {
193 for(uint i = 0; i < ARRAY_SIZE(siglabels); i++) {
194 if (signo == siglabels[i].number) {
195 jio_snprintf(buf, len, "SIG%s", siglabels[i].name);
196 return true;
197 }
198 }
199 return false;
200 }
|
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "os_posix.hpp"
28 #include "prims/jvm.h"
29 #include "runtime/interfaceSupport.hpp"
30 #include "runtime/osThread.hpp"
31
32 #include <signal.h>
33
34
35 // sun.misc.Signal ///////////////////////////////////////////////////////////
36 // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
37 /*
38 * This function is included primarily as a debugging aid. If Java is
39 * running in a console window, then pressing <CTRL-\\> will cause
40 * the current state of all active threads and monitors to be written
41 * to the console window.
42 */
43
44 JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
45 // Copied from classic vm
46 // signals_md.c 1.4 98/08/23
47 void* newHandler = handler == (void *)2
93 // no handler for them is actually registered in JVM or via
94 // JVM_RegisterSignal.
95 if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
96 sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) {
97 return JNI_FALSE;
98 }
99 }
100 else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
101 sig == SHUTDOWN3_SIGNAL) && os::Aix::is_sig_ignored(sig)) {
102 // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL
103 // is ignored, since no handler for them is actually registered in JVM
104 // or via JVM_RegisterSignal.
105 // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL
106 return JNI_FALSE;
107 }
108
109 os::signal_raise(sig);
110 return JNI_TRUE;
111 JVM_END
112
113 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
114 return os::Posix::get_signal_name(name);
115 JVM_END
116
|