Mercurial > hg > graal-compiler
annotate src/os/solaris/vm/jvm_solaris.cpp @ 1725:09cdb1e1c77b
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author | trims |
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date | Fri, 20 Aug 2010 04:08:08 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2007, 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 * | |
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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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_jvm_solaris.cpp.incl" | |
27 | |
28 #include <signal.h> | |
29 | |
30 // sun.misc.Signal /////////////////////////////////////////////////////////// | |
31 // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23 | |
32 /* | |
33 * This function is included primarily as a debugging aid. If Java is | |
34 * running in a console window, then pressing <CTRL-\\> will cause | |
35 * the current state of all active threads and monitors to be written | |
36 * to the console window. | |
37 */ | |
38 | |
39 JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler)) | |
40 // Copied from classic vm | |
41 // signals_md.c 1.4 98/08/23 | |
42 void* newHandler = handler == (void *)2 | |
43 ? os::user_handler() | |
44 : handler; | |
45 switch (sig) { | |
46 /* The following are already used by the VM. */ | |
47 case SIGFPE: | |
48 case SIGILL: | |
49 case SIGSEGV: | |
50 | |
51 /* The following signal is used by the VM to dump thread stacks unless | |
52 ReduceSignalUsage is set, in which case the user is allowed to set | |
53 his own _native_ handler for this signal; thus, in either case, | |
54 we do not allow JVM_RegisterSignal to change the handler. */ | |
55 case BREAK_SIGNAL: | |
56 return (void *)-1; | |
57 | |
58 /* The following signals are used for Shutdown Hooks support. However, if | |
59 ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via | |
60 System.exit(), Java is not allowed to use these signals, and the the | |
61 user is allowed to set his own _native_ handler for these signals and | |
62 invoke System.exit() as needed. Terminator.setup() is avoiding | |
63 registration of these signals when -Xrs is present. | |
64 - If the HUP signal is ignored (from the nohup) command, then Java | |
65 is not allowed to use this signal. | |
66 */ | |
67 case SHUTDOWN1_SIGNAL: | |
68 case SHUTDOWN2_SIGNAL: | |
69 case SHUTDOWN3_SIGNAL: | |
70 if (ReduceSignalUsage) return (void*)-1; | |
71 if (os::Solaris::is_sig_ignored(sig)) return (void*)1; | |
72 } | |
73 | |
74 /* Check parameterized signals. Don't allow sharing of our interrupt signal */ | |
75 if (sig == os::Solaris::SIGinterrupt()) { | |
76 return (void *)-1; | |
77 } | |
78 | |
79 void* oldHandler = os::signal(sig, newHandler); | |
80 if (oldHandler == os::user_handler()) { | |
81 return (void *)2; | |
82 } else { | |
83 return oldHandler; | |
84 } | |
85 JVM_END | |
86 | |
87 | |
88 JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig)) | |
89 if (ReduceSignalUsage) { | |
90 // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL, | |
91 // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since | |
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::Solaris::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 /* | |
114 All the defined signal names for Solaris are defined by str2sig(). | |
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 CANCEL, and Solaris 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, IOT, ABRT, EMT, BUS, SYS, PIPE, ALRM, TERM, USR2, | |
127 CLD, CHLD, PWR, WINCH, URG, POLL, IO, TSTP, CONT, TTIN, TTOU, VTALRM, | |
128 PROF, XCPU, XFSZ, FREEZE, THAW, LOST | |
129 */ | |
130 | |
131 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name)) | |
132 | |
133 int sig; | |
134 | |
135 /* return the named signal's number */ | |
136 | |
137 if(str2sig(name, &sig)) | |
138 return -1; | |
139 else | |
140 return sig; | |
141 | |
142 JVM_END | |
143 | |
144 | |
145 //Reconciliation History | |
146 // 1.4 98/10/07 13:39:41 jvm_win32.cpp | |
147 // 1.6 99/06/22 16:39:00 jvm_win32.cpp | |
148 //End |