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src/os/solaris/vm/jvm_solaris.cpp@710a3c8b516e (annotated)
src/os/solaris/vm/jvm_solaris.cpp
Tue, 08 Aug 2017 15:57:29 +0800
- author
- aoqi
- date
- Tue, 08 Aug 2017 15:57:29 +0800
- changeset 6876
- 710a3c8b516e
- parent 2314
- f95d63e2154a
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #include "precompiled.hpp" |
| aoqi@0 | 26 | #include "prims/jvm.h" |
| aoqi@0 | 27 | #include "runtime/interfaceSupport.hpp" |
| aoqi@0 | 28 | #include "runtime/osThread.hpp" |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | #include <signal.h> |
| aoqi@0 | 31 | |
| aoqi@0 | 32 | // sun.misc.Signal /////////////////////////////////////////////////////////// |
| aoqi@0 | 33 | // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23 |
| aoqi@0 | 34 | /* |
| aoqi@0 | 35 | * This function is included primarily as a debugging aid. If Java is |
| aoqi@0 | 36 | * running in a console window, then pressing <CTRL-\\> will cause |
| aoqi@0 | 37 | * the current state of all active threads and monitors to be written |
| aoqi@0 | 38 | * to the console window. |
| aoqi@0 | 39 | */ |
| aoqi@0 | 40 | |
| aoqi@0 | 41 | JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler)) |
| aoqi@0 | 42 | // Copied from classic vm |
| aoqi@0 | 43 | // signals_md.c 1.4 98/08/23 |
| aoqi@0 | 44 | void* newHandler = handler == (void *)2 |
| aoqi@0 | 45 | ? os::user_handler() |
| aoqi@0 | 46 | : handler; |
| aoqi@0 | 47 | switch (sig) { |
| aoqi@0 | 48 | /* The following are already used by the VM. */ |
| aoqi@0 | 49 | case SIGFPE: |
| aoqi@0 | 50 | case SIGILL: |
| aoqi@0 | 51 | case SIGSEGV: |
| aoqi@0 | 52 | |
| aoqi@0 | 53 | /* The following signal is used by the VM to dump thread stacks unless |
| aoqi@0 | 54 | ReduceSignalUsage is set, in which case the user is allowed to set |
| aoqi@0 | 55 | his own _native_ handler for this signal; thus, in either case, |
| aoqi@0 | 56 | we do not allow JVM_RegisterSignal to change the handler. */ |
| aoqi@0 | 57 | case BREAK_SIGNAL: |
| aoqi@0 | 58 | return (void *)-1; |
| aoqi@0 | 59 | |
| aoqi@0 | 60 | /* The following signals are used for Shutdown Hooks support. However, if |
| aoqi@0 | 61 | ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via |
| aoqi@0 | 62 | System.exit(), Java is not allowed to use these signals, and the the |
| aoqi@0 | 63 | user is allowed to set his own _native_ handler for these signals and |
| aoqi@0 | 64 | invoke System.exit() as needed. Terminator.setup() is avoiding |
| aoqi@0 | 65 | registration of these signals when -Xrs is present. |
| aoqi@0 | 66 | - If the HUP signal is ignored (from the nohup) command, then Java |
| aoqi@0 | 67 | is not allowed to use this signal. |
| aoqi@0 | 68 | */ |
| aoqi@0 | 69 | case SHUTDOWN1_SIGNAL: |
| aoqi@0 | 70 | case SHUTDOWN2_SIGNAL: |
| aoqi@0 | 71 | case SHUTDOWN3_SIGNAL: |
| aoqi@0 | 72 | if (ReduceSignalUsage) return (void*)-1; |
| aoqi@0 | 73 | if (os::Solaris::is_sig_ignored(sig)) return (void*)1; |
| aoqi@0 | 74 | } |
| aoqi@0 | 75 | |
| aoqi@0 | 76 | /* Check parameterized signals. Don't allow sharing of our interrupt signal */ |
| aoqi@0 | 77 | if (sig == os::Solaris::SIGinterrupt()) { |
| aoqi@0 | 78 | return (void *)-1; |
| aoqi@0 | 79 | } |
| aoqi@0 | 80 | |
| aoqi@0 | 81 | void* oldHandler = os::signal(sig, newHandler); |
| aoqi@0 | 82 | if (oldHandler == os::user_handler()) { |
| aoqi@0 | 83 | return (void *)2; |
| aoqi@0 | 84 | } else { |
| aoqi@0 | 85 | return oldHandler; |
| aoqi@0 | 86 | } |
| aoqi@0 | 87 | JVM_END |
| aoqi@0 | 88 | |
| aoqi@0 | 89 | |
| aoqi@0 | 90 | JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig)) |
| aoqi@0 | 91 | if (ReduceSignalUsage) { |
| aoqi@0 | 92 | // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL, |
| aoqi@0 | 93 | // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since |
| aoqi@0 | 94 | // no handler for them is actually registered in JVM or via |
| aoqi@0 | 95 | // JVM_RegisterSignal. |
| aoqi@0 | 96 | if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || |
| aoqi@0 | 97 | sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) { |
| aoqi@0 | 98 | return JNI_FALSE; |
| aoqi@0 | 99 | } |
| aoqi@0 | 100 | } |
| aoqi@0 | 101 | else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || |
| aoqi@0 | 102 | sig == SHUTDOWN3_SIGNAL) && os::Solaris::is_sig_ignored(sig)) { |
| aoqi@0 | 103 | // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL |
| aoqi@0 | 104 | // is ignored, since no handler for them is actually registered in JVM |
| aoqi@0 | 105 | // or via JVM_RegisterSignal. |
| aoqi@0 | 106 | // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL |
| aoqi@0 | 107 | return JNI_FALSE; |
| aoqi@0 | 108 | } |
| aoqi@0 | 109 | |
| aoqi@0 | 110 | os::signal_raise(sig); |
| aoqi@0 | 111 | return JNI_TRUE; |
| aoqi@0 | 112 | JVM_END |
| aoqi@0 | 113 | |
| aoqi@0 | 114 | |
| aoqi@0 | 115 | /* |
| aoqi@0 | 116 | All the defined signal names for Solaris are defined by str2sig(). |
| aoqi@0 | 117 | |
| aoqi@0 | 118 | NOTE that not all of these names are accepted by our Java implementation |
| aoqi@0 | 119 | |
| aoqi@0 | 120 | Via an existing claim by the VM, sigaction restrictions, or |
| aoqi@0 | 121 | the "rules of Unix" some of these names will be rejected at runtime. |
| aoqi@0 | 122 | For example the VM sets up to handle USR1, sigaction returns EINVAL for |
| aoqi@0 | 123 | CANCEL, and Solaris simply doesn't allow catching of KILL. |
| aoqi@0 | 124 | |
| aoqi@0 | 125 | Here are the names currently accepted by a user of sun.misc.Signal with |
| aoqi@0 | 126 | 1.4.1 (ignoring potential interaction with use of chaining, etc): |
| aoqi@0 | 127 | |
| aoqi@0 | 128 | HUP, INT, TRAP, IOT, ABRT, EMT, BUS, SYS, PIPE, ALRM, TERM, USR2, |
| aoqi@0 | 129 | CLD, CHLD, PWR, WINCH, URG, POLL, IO, TSTP, CONT, TTIN, TTOU, VTALRM, |
| aoqi@0 | 130 | PROF, XCPU, XFSZ, FREEZE, THAW, LOST |
| aoqi@0 | 131 | */ |
| aoqi@0 | 132 | |
| aoqi@0 | 133 | JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name)) |
| aoqi@0 | 134 | |
| aoqi@0 | 135 | int sig; |
| aoqi@0 | 136 | |
| aoqi@0 | 137 | /* return the named signal's number */ |
| aoqi@0 | 138 | |
| aoqi@0 | 139 | if(str2sig(name, &sig)) |
| aoqi@0 | 140 | return -1; |
| aoqi@0 | 141 | else |
| aoqi@0 | 142 | return sig; |
| aoqi@0 | 143 | |
| aoqi@0 | 144 | JVM_END |
| aoqi@0 | 145 | |
| aoqi@0 | 146 | |
| aoqi@0 | 147 | //Reconciliation History |
| aoqi@0 | 148 | // 1.4 98/10/07 13:39:41 jvm_win32.cpp |
| aoqi@0 | 149 | // 1.6 99/06/22 16:39:00 jvm_win32.cpp |
| aoqi@0 | 150 | //End |
