Thu, 19 Mar 2009 09:13:24 -0700
Merge
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_jvm_solaris.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | #include <signal.h> |
duke@435 | 29 | |
duke@435 | 30 | // sun.misc.Signal /////////////////////////////////////////////////////////// |
duke@435 | 31 | // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23 |
duke@435 | 32 | /* |
duke@435 | 33 | * This function is included primarily as a debugging aid. If Java is |
duke@435 | 34 | * running in a console window, then pressing <CTRL-\\> will cause |
duke@435 | 35 | * the current state of all active threads and monitors to be written |
duke@435 | 36 | * to the console window. |
duke@435 | 37 | */ |
duke@435 | 38 | |
duke@435 | 39 | JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler)) |
duke@435 | 40 | // Copied from classic vm |
duke@435 | 41 | // signals_md.c 1.4 98/08/23 |
duke@435 | 42 | void* newHandler = handler == (void *)2 |
duke@435 | 43 | ? os::user_handler() |
duke@435 | 44 | : handler; |
duke@435 | 45 | switch (sig) { |
duke@435 | 46 | /* The following are already used by the VM. */ |
duke@435 | 47 | case SIGFPE: |
duke@435 | 48 | case SIGILL: |
duke@435 | 49 | case SIGSEGV: |
duke@435 | 50 | |
duke@435 | 51 | /* The following signal is used by the VM to dump thread stacks unless |
duke@435 | 52 | ReduceSignalUsage is set, in which case the user is allowed to set |
duke@435 | 53 | his own _native_ handler for this signal; thus, in either case, |
duke@435 | 54 | we do not allow JVM_RegisterSignal to change the handler. */ |
duke@435 | 55 | case BREAK_SIGNAL: |
duke@435 | 56 | return (void *)-1; |
duke@435 | 57 | |
duke@435 | 58 | /* The following signals are used for Shutdown Hooks support. However, if |
duke@435 | 59 | ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via |
duke@435 | 60 | System.exit(), Java is not allowed to use these signals, and the the |
duke@435 | 61 | user is allowed to set his own _native_ handler for these signals and |
duke@435 | 62 | invoke System.exit() as needed. Terminator.setup() is avoiding |
duke@435 | 63 | registration of these signals when -Xrs is present. |
duke@435 | 64 | - If the HUP signal is ignored (from the nohup) command, then Java |
duke@435 | 65 | is not allowed to use this signal. |
duke@435 | 66 | */ |
duke@435 | 67 | case SHUTDOWN1_SIGNAL: |
duke@435 | 68 | case SHUTDOWN2_SIGNAL: |
duke@435 | 69 | case SHUTDOWN3_SIGNAL: |
duke@435 | 70 | if (ReduceSignalUsage) return (void*)-1; |
duke@435 | 71 | if (os::Solaris::is_sig_ignored(sig)) return (void*)1; |
duke@435 | 72 | } |
duke@435 | 73 | |
duke@435 | 74 | /* Check parameterized signals. Don't allow sharing of our interrupt signal */ |
duke@435 | 75 | if (sig == os::Solaris::SIGinterrupt()) { |
duke@435 | 76 | return (void *)-1; |
duke@435 | 77 | } |
duke@435 | 78 | |
duke@435 | 79 | void* oldHandler = os::signal(sig, newHandler); |
duke@435 | 80 | if (oldHandler == os::user_handler()) { |
duke@435 | 81 | return (void *)2; |
duke@435 | 82 | } else { |
duke@435 | 83 | return oldHandler; |
duke@435 | 84 | } |
duke@435 | 85 | JVM_END |
duke@435 | 86 | |
duke@435 | 87 | |
duke@435 | 88 | JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig)) |
duke@435 | 89 | if (ReduceSignalUsage) { |
duke@435 | 90 | // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL, |
duke@435 | 91 | // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since |
duke@435 | 92 | // no handler for them is actually registered in JVM or via |
duke@435 | 93 | // JVM_RegisterSignal. |
duke@435 | 94 | if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || |
duke@435 | 95 | sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) { |
duke@435 | 96 | return JNI_FALSE; |
duke@435 | 97 | } |
duke@435 | 98 | } |
duke@435 | 99 | else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || |
duke@435 | 100 | sig == SHUTDOWN3_SIGNAL) && os::Solaris::is_sig_ignored(sig)) { |
duke@435 | 101 | // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL |
duke@435 | 102 | // is ignored, since no handler for them is actually registered in JVM |
duke@435 | 103 | // or via JVM_RegisterSignal. |
duke@435 | 104 | // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL |
duke@435 | 105 | return JNI_FALSE; |
duke@435 | 106 | } |
duke@435 | 107 | |
duke@435 | 108 | os::signal_raise(sig); |
duke@435 | 109 | return JNI_TRUE; |
duke@435 | 110 | JVM_END |
duke@435 | 111 | |
duke@435 | 112 | |
duke@435 | 113 | /* |
duke@435 | 114 | All the defined signal names for Solaris are defined by str2sig(). |
duke@435 | 115 | |
duke@435 | 116 | NOTE that not all of these names are accepted by our Java implementation |
duke@435 | 117 | |
duke@435 | 118 | Via an existing claim by the VM, sigaction restrictions, or |
duke@435 | 119 | the "rules of Unix" some of these names will be rejected at runtime. |
duke@435 | 120 | For example the VM sets up to handle USR1, sigaction returns EINVAL for |
duke@435 | 121 | CANCEL, and Solaris simply doesn't allow catching of KILL. |
duke@435 | 122 | |
duke@435 | 123 | Here are the names currently accepted by a user of sun.misc.Signal with |
duke@435 | 124 | 1.4.1 (ignoring potential interaction with use of chaining, etc): |
duke@435 | 125 | |
duke@435 | 126 | HUP, INT, TRAP, IOT, ABRT, EMT, BUS, SYS, PIPE, ALRM, TERM, USR2, |
duke@435 | 127 | CLD, CHLD, PWR, WINCH, URG, POLL, IO, TSTP, CONT, TTIN, TTOU, VTALRM, |
duke@435 | 128 | PROF, XCPU, XFSZ, FREEZE, THAW, LOST |
duke@435 | 129 | */ |
duke@435 | 130 | |
duke@435 | 131 | JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name)) |
duke@435 | 132 | |
duke@435 | 133 | int sig; |
duke@435 | 134 | |
duke@435 | 135 | /* return the named signal's number */ |
duke@435 | 136 | |
duke@435 | 137 | if(str2sig(name, &sig)) |
duke@435 | 138 | return -1; |
duke@435 | 139 | else |
duke@435 | 140 | return sig; |
duke@435 | 141 | |
duke@435 | 142 | JVM_END |
duke@435 | 143 | |
duke@435 | 144 | |
duke@435 | 145 | //Reconciliation History |
duke@435 | 146 | // 1.4 98/10/07 13:39:41 jvm_win32.cpp |
duke@435 | 147 | // 1.6 99/06/22 16:39:00 jvm_win32.cpp |
duke@435 | 148 | //End |