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annotate src/os/solaris/vm/jvm_solaris.cpp @ 14787:6ce74db1c9fb
Use List<T> instead of Iterable<T> in AbstractBlock to (temporary) allow editing.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Wed, 12 Mar 2014 13:38:12 +0100 |
parents | f95d63e2154a |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "prims/jvm.h" | |
27 #include "runtime/interfaceSupport.hpp" | |
28 #include "runtime/osThread.hpp" | |
0 | 29 |
30 #include <signal.h> | |
31 | |
32 // sun.misc.Signal /////////////////////////////////////////////////////////// | |
33 // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23 | |
34 /* | |
35 * This function is included primarily as a debugging aid. If Java is | |
36 * running in a console window, then pressing <CTRL-\\> will cause | |
37 * the current state of all active threads and monitors to be written | |
38 * to the console window. | |
39 */ | |
40 | |
41 JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler)) | |
42 // Copied from classic vm | |
43 // signals_md.c 1.4 98/08/23 | |
44 void* newHandler = handler == (void *)2 | |
45 ? os::user_handler() | |
46 : handler; | |
47 switch (sig) { | |
48 /* The following are already used by the VM. */ | |
49 case SIGFPE: | |
50 case SIGILL: | |
51 case SIGSEGV: | |
52 | |
53 /* The following signal is used by the VM to dump thread stacks unless | |
54 ReduceSignalUsage is set, in which case the user is allowed to set | |
55 his own _native_ handler for this signal; thus, in either case, | |
56 we do not allow JVM_RegisterSignal to change the handler. */ | |
57 case BREAK_SIGNAL: | |
58 return (void *)-1; | |
59 | |
60 /* The following signals are used for Shutdown Hooks support. However, if | |
61 ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via | |
62 System.exit(), Java is not allowed to use these signals, and the the | |
63 user is allowed to set his own _native_ handler for these signals and | |
64 invoke System.exit() as needed. Terminator.setup() is avoiding | |
65 registration of these signals when -Xrs is present. | |
66 - If the HUP signal is ignored (from the nohup) command, then Java | |
67 is not allowed to use this signal. | |
68 */ | |
69 case SHUTDOWN1_SIGNAL: | |
70 case SHUTDOWN2_SIGNAL: | |
71 case SHUTDOWN3_SIGNAL: | |
72 if (ReduceSignalUsage) return (void*)-1; | |
73 if (os::Solaris::is_sig_ignored(sig)) return (void*)1; | |
74 } | |
75 | |
76 /* Check parameterized signals. Don't allow sharing of our interrupt signal */ | |
77 if (sig == os::Solaris::SIGinterrupt()) { | |
78 return (void *)-1; | |
79 } | |
80 | |
81 void* oldHandler = os::signal(sig, newHandler); | |
82 if (oldHandler == os::user_handler()) { | |
83 return (void *)2; | |
84 } else { | |
85 return oldHandler; | |
86 } | |
87 JVM_END | |
88 | |
89 | |
90 JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig)) | |
91 if (ReduceSignalUsage) { | |
92 // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL, | |
93 // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since | |
94 // no handler for them is actually registered in JVM or via | |
95 // JVM_RegisterSignal. | |
96 if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || | |
97 sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) { | |
98 return JNI_FALSE; | |
99 } | |
100 } | |
101 else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || | |
102 sig == SHUTDOWN3_SIGNAL) && os::Solaris::is_sig_ignored(sig)) { | |
103 // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL | |
104 // is ignored, since no handler for them is actually registered in JVM | |
105 // or via JVM_RegisterSignal. | |
106 // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL | |
107 return JNI_FALSE; | |
108 } | |
109 | |
110 os::signal_raise(sig); | |
111 return JNI_TRUE; | |
112 JVM_END | |
113 | |
114 | |
115 /* | |
116 All the defined signal names for Solaris are defined by str2sig(). | |
117 | |
118 NOTE that not all of these names are accepted by our Java implementation | |
119 | |
120 Via an existing claim by the VM, sigaction restrictions, or | |
121 the "rules of Unix" some of these names will be rejected at runtime. | |
122 For example the VM sets up to handle USR1, sigaction returns EINVAL for | |
123 CANCEL, and Solaris simply doesn't allow catching of KILL. | |
124 | |
125 Here are the names currently accepted by a user of sun.misc.Signal with | |
126 1.4.1 (ignoring potential interaction with use of chaining, etc): | |
127 | |
128 HUP, INT, TRAP, IOT, ABRT, EMT, BUS, SYS, PIPE, ALRM, TERM, USR2, | |
129 CLD, CHLD, PWR, WINCH, URG, POLL, IO, TSTP, CONT, TTIN, TTOU, VTALRM, | |
130 PROF, XCPU, XFSZ, FREEZE, THAW, LOST | |
131 */ | |
132 | |
133 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name)) | |
134 | |
135 int sig; | |
136 | |
137 /* return the named signal's number */ | |
138 | |
139 if(str2sig(name, &sig)) | |
140 return -1; | |
141 else | |
142 return sig; | |
143 | |
144 JVM_END | |
145 | |
146 | |
147 //Reconciliation History | |
148 // 1.4 98/10/07 13:39:41 jvm_win32.cpp | |
149 // 1.6 99/06/22 16:39:00 jvm_win32.cpp | |
150 //End |