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src/os/bsd/vm/jvm_bsd.cpp@6bf8b8bb7c19 (annotated)
src/os/bsd/vm/jvm_bsd.cpp
Wed, 05 Jun 2013 14:12:49 -0400
- author
- hseigel
- date
- Wed, 05 Jun 2013 14:12:49 -0400
- changeset 5218
- 6bf8b8bb7c19
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
Summary: Use SA_ONSTACK flag to ensure signal gets delivered properly.
Reviewed-by: dholmes, coleenp
Contributed-by: gerard.ziemski@oracle.com
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 1999, 2011, 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 | |
| aoqi@0 | 33 | // sun.misc.Signal /////////////////////////////////////////////////////////// |
| aoqi@0 | 34 | // Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23 |
| aoqi@0 | 35 | /* |
| aoqi@0 | 36 | * This function is included primarily as a debugging aid. If Java is |
| aoqi@0 | 37 | * running in a console window, then pressing <CTRL-\\> will cause |
| aoqi@0 | 38 | * the current state of all active threads and monitors to be written |
| aoqi@0 | 39 | * to the console window. |
| aoqi@0 | 40 | */ |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler)) |
| aoqi@0 | 43 | // Copied from classic vm |
| aoqi@0 | 44 | // signals_md.c 1.4 98/08/23 |
| aoqi@0 | 45 | void* newHandler = handler == (void *)2 |
| aoqi@0 | 46 | ? os::user_handler() |
| aoqi@0 | 47 | : handler; |
| aoqi@0 | 48 | switch (sig) { |
| aoqi@0 | 49 | /* The following are already used by the VM. */ |
| aoqi@0 | 50 | case INTERRUPT_SIGNAL: |
| aoqi@0 | 51 | case SIGFPE: |
| aoqi@0 | 52 | case SIGILL: |
| aoqi@0 | 53 | case SIGSEGV: |
| aoqi@0 | 54 | |
| aoqi@0 | 55 | /* The following signal is used by the VM to dump thread stacks unless |
| aoqi@0 | 56 | ReduceSignalUsage is set, in which case the user is allowed to set |
| aoqi@0 | 57 | his own _native_ handler for this signal; thus, in either case, |
| aoqi@0 | 58 | we do not allow JVM_RegisterSignal to change the handler. */ |
| aoqi@0 | 59 | case BREAK_SIGNAL: |
| aoqi@0 | 60 | return (void *)-1; |
| aoqi@0 | 61 | |
| aoqi@0 | 62 | /* The following signals are used for Shutdown Hooks support. However, if |
| aoqi@0 | 63 | ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via |
| aoqi@0 | 64 | System.exit(), Java is not allowed to use these signals, and the the |
| aoqi@0 | 65 | user is allowed to set his own _native_ handler for these signals and |
| aoqi@0 | 66 | invoke System.exit() as needed. Terminator.setup() is avoiding |
| aoqi@0 | 67 | registration of these signals when -Xrs is present. |
| aoqi@0 | 68 | - If the HUP signal is ignored (from the nohup) command, then Java |
| aoqi@0 | 69 | is not allowed to use this signal. |
| aoqi@0 | 70 | */ |
| aoqi@0 | 71 | |
| aoqi@0 | 72 | case SHUTDOWN1_SIGNAL: |
| aoqi@0 | 73 | case SHUTDOWN2_SIGNAL: |
| aoqi@0 | 74 | case SHUTDOWN3_SIGNAL: |
| aoqi@0 | 75 | if (ReduceSignalUsage) return (void*)-1; |
| aoqi@0 | 76 | if (os::Bsd::is_sig_ignored(sig)) return (void*)1; |
| aoqi@0 | 77 | } |
| aoqi@0 | 78 | |
| aoqi@0 | 79 | void* oldHandler = os::signal(sig, newHandler); |
| aoqi@0 | 80 | if (oldHandler == os::user_handler()) { |
| aoqi@0 | 81 | return (void *)2; |
| aoqi@0 | 82 | } else { |
| aoqi@0 | 83 | return oldHandler; |
| aoqi@0 | 84 | } |
| aoqi@0 | 85 | JVM_END |
| aoqi@0 | 86 | |
| aoqi@0 | 87 | |
| aoqi@0 | 88 | JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig)) |
| aoqi@0 | 89 | if (ReduceSignalUsage) { |
| aoqi@0 | 90 | // do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL, |
| aoqi@0 | 91 | // BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since |
| aoqi@0 | 92 | // no handler for them is actually registered in JVM or via |
| aoqi@0 | 93 | // JVM_RegisterSignal. |
| aoqi@0 | 94 | if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || |
| aoqi@0 | 95 | sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) { |
| aoqi@0 | 96 | return JNI_FALSE; |
| aoqi@0 | 97 | } |
| aoqi@0 | 98 | } |
| aoqi@0 | 99 | else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL || |
| aoqi@0 | 100 | sig == SHUTDOWN3_SIGNAL) && os::Bsd::is_sig_ignored(sig)) { |
| aoqi@0 | 101 | // do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL |
| aoqi@0 | 102 | // is ignored, since no handler for them is actually registered in JVM |
| aoqi@0 | 103 | // or via JVM_RegisterSignal. |
| aoqi@0 | 104 | // This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL |
| aoqi@0 | 105 | return JNI_FALSE; |
| aoqi@0 | 106 | } |
| aoqi@0 | 107 | |
| aoqi@0 | 108 | os::signal_raise(sig); |
| aoqi@0 | 109 | return JNI_TRUE; |
| aoqi@0 | 110 | JVM_END |
| aoqi@0 | 111 | |
| aoqi@0 | 112 | /* |
| aoqi@0 | 113 | All the defined signal names for Bsd. |
| aoqi@0 | 114 | |
| aoqi@0 | 115 | NOTE that not all of these names are accepted by our Java implementation |
| aoqi@0 | 116 | |
| aoqi@0 | 117 | Via an existing claim by the VM, sigaction restrictions, or |
| aoqi@0 | 118 | the "rules of Unix" some of these names will be rejected at runtime. |
| aoqi@0 | 119 | For example the VM sets up to handle USR1, sigaction returns EINVAL for |
| aoqi@0 | 120 | STOP, and Bsd simply doesn't allow catching of KILL. |
| aoqi@0 | 121 | |
| aoqi@0 | 122 | Here are the names currently accepted by a user of sun.misc.Signal with |
| aoqi@0 | 123 | 1.4.1 (ignoring potential interaction with use of chaining, etc): |
| aoqi@0 | 124 | |
| aoqi@0 | 125 | HUP, INT, TRAP, ABRT, IOT, BUS, USR2, PIPE, ALRM, TERM, STKFLT, |
| aoqi@0 | 126 | CLD, CHLD, CONT, TSTP, TTIN, TTOU, URG, XCPU, XFSZ, VTALRM, PROF, |
| aoqi@0 | 127 | WINCH, POLL, IO, PWR, SYS |
| aoqi@0 | 128 | |
| aoqi@0 | 129 | */ |
| aoqi@0 | 130 | |
| aoqi@0 | 131 | struct siglabel { |
| aoqi@0 | 132 | const char *name; |
| aoqi@0 | 133 | int number; |
| aoqi@0 | 134 | }; |
| aoqi@0 | 135 | |
| aoqi@0 | 136 | struct siglabel siglabels[] = { |
| aoqi@0 | 137 | /* derived from /usr/include/bits/signum.h on RH7.2 */ |
| aoqi@0 | 138 | "HUP", SIGHUP, /* Hangup (POSIX). */ |
| aoqi@0 | 139 | "INT", SIGINT, /* Interrupt (ANSI). */ |
| aoqi@0 | 140 | "QUIT", SIGQUIT, /* Quit (POSIX). */ |
| aoqi@0 | 141 | "ILL", SIGILL, /* Illegal instruction (ANSI). */ |
| aoqi@0 | 142 | "TRAP", SIGTRAP, /* Trace trap (POSIX). */ |
| aoqi@0 | 143 | "ABRT", SIGABRT, /* Abort (ANSI). */ |
| aoqi@0 | 144 | "EMT", SIGEMT, /* EMT trap */ |
| aoqi@0 | 145 | "FPE", SIGFPE, /* Floating-point exception (ANSI). */ |
| aoqi@0 | 146 | "KILL", SIGKILL, /* Kill, unblockable (POSIX). */ |
| aoqi@0 | 147 | "BUS", SIGBUS, /* BUS error (4.2 BSD). */ |
| aoqi@0 | 148 | "SEGV", SIGSEGV, /* Segmentation violation (ANSI). */ |
| aoqi@0 | 149 | "SYS", SIGSYS, /* Bad system call. Only on some Bsden! */ |
| aoqi@0 | 150 | "PIPE", SIGPIPE, /* Broken pipe (POSIX). */ |
| aoqi@0 | 151 | "ALRM", SIGALRM, /* Alarm clock (POSIX). */ |
| aoqi@0 | 152 | "TERM", SIGTERM, /* Termination (ANSI). */ |
| aoqi@0 | 153 | "URG", SIGURG, /* Urgent condition on socket (4.2 BSD). */ |
| aoqi@0 | 154 | "STOP", SIGSTOP, /* Stop, unblockable (POSIX). */ |
| aoqi@0 | 155 | "TSTP", SIGTSTP, /* Keyboard stop (POSIX). */ |
| aoqi@0 | 156 | "CONT", SIGCONT, /* Continue (POSIX). */ |
| aoqi@0 | 157 | "CHLD", SIGCHLD, /* Child status has changed (POSIX). */ |
| aoqi@0 | 158 | "TTIN", SIGTTIN, /* Background read from tty (POSIX). */ |
| aoqi@0 | 159 | "TTOU", SIGTTOU, /* Background write to tty (POSIX). */ |
| aoqi@0 | 160 | "IO", SIGIO, /* I/O now possible (4.2 BSD). */ |
| aoqi@0 | 161 | "XCPU", SIGXCPU, /* CPU limit exceeded (4.2 BSD). */ |
| aoqi@0 | 162 | "XFSZ", SIGXFSZ, /* File size limit exceeded (4.2 BSD). */ |
| aoqi@0 | 163 | "VTALRM", SIGVTALRM, /* Virtual alarm clock (4.2 BSD). */ |
| aoqi@0 | 164 | "PROF", SIGPROF, /* Profiling alarm clock (4.2 BSD). */ |
| aoqi@0 | 165 | "WINCH", SIGWINCH, /* Window size change (4.3 BSD, Sun). */ |
| aoqi@0 | 166 | "INFO", SIGINFO, /* Information request. */ |
| aoqi@0 | 167 | "USR1", SIGUSR1, /* User-defined signal 1 (POSIX). */ |
| aoqi@0 | 168 | "USR2", SIGUSR2 /* User-defined signal 2 (POSIX). */ |
| aoqi@0 | 169 | }; |
| aoqi@0 | 170 | |
| aoqi@0 | 171 | JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name)) |
| aoqi@0 | 172 | |
| aoqi@0 | 173 | /* find and return the named signal's number */ |
| aoqi@0 | 174 | |
| aoqi@0 | 175 | for(uint i=0; i<ARRAY_SIZE(siglabels); i++) |
| aoqi@0 | 176 | if(!strcmp(name, siglabels[i].name)) |
| aoqi@0 | 177 | return siglabels[i].number; |
| aoqi@0 | 178 | |
| aoqi@0 | 179 | return -1; |
| aoqi@0 | 180 | |
| aoqi@0 | 181 | JVM_END |
| aoqi@0 | 182 | |
| aoqi@0 | 183 | // used by os::exception_name() |
| aoqi@0 | 184 | extern bool signal_name(int signo, char* buf, size_t len) { |
| aoqi@0 | 185 | for(uint i = 0; i < ARRAY_SIZE(siglabels); i++) { |
| aoqi@0 | 186 | if (signo == siglabels[i].number) { |
| aoqi@0 | 187 | jio_snprintf(buf, len, "SIG%s", siglabels[i].name); |
| aoqi@0 | 188 | return true; |
| aoqi@0 | 189 | } |
| aoqi@0 | 190 | } |
| aoqi@0 | 191 | return false; |
| aoqi@0 | 192 | } |
