Mercurial > hg > truffle
comparison src/os/aix/vm/jvm_aix.cpp @ 14415:666e6ce3976c
8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
Reviewed-by: kvn
author | simonis |
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date | Fri, 06 Sep 2013 20:16:09 +0200 |
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1 /* | |
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2012, 2013 SAP AG. All rights reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
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 | |
47 ? os::user_handler() | |
48 : handler; | |
49 switch (sig) { | |
50 /* The following are already used by the VM. */ | |
51 case INTERRUPT_SIGNAL: | |
52 case SIGFPE: | |
53 case SIGILL: | |
54 case SIGSEGV: | |
55 | |
56 /* The following signal is used by the VM to dump thread stacks unless | |
57 ReduceSignalUsage is set, in which case the user is allowed to set | |
58 his own _native_ handler for this signal; thus, in either case, | |
59 we do not allow JVM_RegisterSignal to change the handler. */ | |
60 case BREAK_SIGNAL: | |
61 return (void *)-1; | |
62 | |
63 /* The following signals are used for Shutdown Hooks support. However, if | |
64 ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via | |
65 System.exit(), Java is not allowed to use these signals, and the the | |
66 user is allowed to set his own _native_ handler for these signals and | |
67 invoke System.exit() as needed. Terminator.setup() is avoiding | |
68 registration of these signals when -Xrs is present. | |
69 - If the HUP signal is ignored (from the nohup) command, then Java | |
70 is not allowed to use this signal. | |
71 */ | |
72 | |
73 case SHUTDOWN1_SIGNAL: | |
74 case SHUTDOWN2_SIGNAL: | |
75 case SHUTDOWN3_SIGNAL: | |
76 if (ReduceSignalUsage) return (void*)-1; | |
77 if (os::Aix::is_sig_ignored(sig)) return (void*)1; | |
78 } | |
79 | |
80 void* oldHandler = os::signal(sig, newHandler); | |
81 if (oldHandler == os::user_handler()) { | |
82 return (void *)2; | |
83 } else { | |
84 return oldHandler; | |
85 } | |
86 JVM_END | |
87 | |
88 | |
89 JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig)) | |
90 if (ReduceSignalUsage) { | |
91 // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL, | |
92 // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since | |
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 /* | |
114 All the defined signal names for Linux. | |
115 | |
116 NOTE that not all of these names are accepted by our Java implementation | |
117 | |
118 Via an existing claim by the VM, sigaction restrictions, or | |
119 the "rules of Unix" some of these names will be rejected at runtime. | |
120 For example the VM sets up to handle USR1, sigaction returns EINVAL for | |
121 STOP, and Linux simply doesn't allow catching of KILL. | |
122 | |
123 Here are the names currently accepted by a user of sun.misc.Signal with | |
124 1.4.1 (ignoring potential interaction with use of chaining, etc): | |
125 | |
126 HUP, INT, TRAP, ABRT, IOT, BUS, USR2, PIPE, ALRM, TERM, STKFLT, | |
127 CLD, CHLD, CONT, TSTP, TTIN, TTOU, URG, XCPU, XFSZ, VTALRM, PROF, | |
128 WINCH, POLL, IO, PWR, SYS | |
129 | |
130 */ | |
131 | |
132 struct siglabel { | |
133 const char *name; | |
134 int number; | |
135 }; | |
136 | |
137 struct siglabel siglabels[] = { | |
138 /* derived from /usr/include/bits/signum.h on RH7.2 */ | |
139 "HUP", SIGHUP, /* Hangup (POSIX). */ | |
140 "INT", SIGINT, /* Interrupt (ANSI). */ | |
141 "QUIT", SIGQUIT, /* Quit (POSIX). */ | |
142 "ILL", SIGILL, /* Illegal instruction (ANSI). */ | |
143 "TRAP", SIGTRAP, /* Trace trap (POSIX). */ | |
144 "ABRT", SIGABRT, /* Abort (ANSI). */ | |
145 "IOT", SIGIOT, /* IOT trap (4.2 BSD). */ | |
146 "BUS", SIGBUS, /* BUS error (4.2 BSD). */ | |
147 "FPE", SIGFPE, /* Floating-point exception (ANSI). */ | |
148 "KILL", SIGKILL, /* Kill, unblockable (POSIX). */ | |
149 "USR1", SIGUSR1, /* User-defined signal 1 (POSIX). */ | |
150 "SEGV", SIGSEGV, /* Segmentation violation (ANSI). */ | |
151 "USR2", SIGUSR2, /* User-defined signal 2 (POSIX). */ | |
152 "PIPE", SIGPIPE, /* Broken pipe (POSIX). */ | |
153 "ALRM", SIGALRM, /* Alarm clock (POSIX). */ | |
154 "TERM", SIGTERM, /* Termination (ANSI). */ | |
155 #ifdef SIGSTKFLT | |
156 "STKFLT", SIGSTKFLT, /* Stack fault. */ | |
157 #endif | |
158 "CLD", SIGCLD, /* Same as SIGCHLD (System V). */ | |
159 "CHLD", SIGCHLD, /* Child status has changed (POSIX). */ | |
160 "CONT", SIGCONT, /* Continue (POSIX). */ | |
161 "STOP", SIGSTOP, /* Stop, unblockable (POSIX). */ | |
162 "TSTP", SIGTSTP, /* Keyboard stop (POSIX). */ | |
163 "TTIN", SIGTTIN, /* Background read from tty (POSIX). */ | |
164 "TTOU", SIGTTOU, /* Background write to tty (POSIX). */ | |
165 "URG", SIGURG, /* Urgent condition on socket (4.2 BSD). */ | |
166 "XCPU", SIGXCPU, /* CPU limit exceeded (4.2 BSD). */ | |
167 "XFSZ", SIGXFSZ, /* File size limit exceeded (4.2 BSD). */ | |
168 "DANGER", SIGDANGER, /* System crash imminent; free up some page space (AIX). */ | |
169 "VTALRM", SIGVTALRM, /* Virtual alarm clock (4.2 BSD). */ | |
170 "PROF", SIGPROF, /* Profiling alarm clock (4.2 BSD). */ | |
171 "WINCH", SIGWINCH, /* Window size change (4.3 BSD, Sun). */ | |
172 "POLL", SIGPOLL, /* Pollable event occurred (System V). */ | |
173 "IO", SIGIO, /* I/O now possible (4.2 BSD). */ | |
174 "PWR", SIGPWR, /* Power failure restart (System V). */ | |
175 #ifdef SIGSYS | |
176 "SYS", SIGSYS /* Bad system call. Only on some Linuxen! */ | |
177 #endif | |
178 }; | |
179 | |
180 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name)) | |
181 | |
182 /* find and return the named signal's number */ | |
183 | |
184 for(uint i=0; i<ARRAY_SIZE(siglabels); i++) | |
185 if(!strcmp(name, siglabels[i].name)) | |
186 return siglabels[i].number; | |
187 | |
188 return -1; | |
189 | |
190 JVM_END | |
191 | |
192 // used by os::exception_name() | |
193 extern bool signal_name(int signo, char* buf, size_t len) { | |
194 for(uint i = 0; i < ARRAY_SIZE(siglabels); i++) { | |
195 if (signo == siglabels[i].number) { | |
196 jio_snprintf(buf, len, "SIG%s", siglabels[i].name); | |
197 return true; | |
198 } | |
199 } | |
200 return false; | |
201 } |