Mercurial > hg > graal-compiler
annotate src/os/solaris/vm/jvm_solaris.cpp @ 1865:1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
Summary: Absolute time 0 needs to return immediately.
Reviewed-by: phh, dcubed, dholmes
| author | acorn |
|---|---|
| date | Mon, 04 Oct 2010 13:11:10 -0400 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 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 |