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7089790: integrate bsd-port changes
Co-authored-by: Greg Lewis <glewis@eyesbeyond.com> Co-authored-by: Jung-uk Kim <jkim@freebsd.org> Co-authored-by: Christos Zoulas <christos@zoulas.com> Co-authored-by: Landon Fuller <landonf@plausible.coop> Co-authored-by: The FreeBSD Foundation <board@freebsdfoundation.org> Co-authored-by: Michael Franz <mvfranz@gmail.com> Co-authored-by: Roger Hoover <rhoover@apple.com> Co-authored-by: Alexander Strange <astrange@apple.com> Reviewed-by: kvn, twisti, jrose
This commit is contained in:
Kurt Miller
Tom Rodriguez
parent
52f0eccb24
commit
95c56a472b
291 changed files with 26162 additions and 145 deletions
192
hotspot/src/os/bsd/vm/jvm_bsd.cpp
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192
hotspot/src/os/bsd/vm/jvm_bsd.cpp
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/*
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "prims/jvm.h"
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#include "runtime/interfaceSupport.hpp"
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#include "runtime/osThread.hpp"
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#include <signal.h>
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// sun.misc.Signal ///////////////////////////////////////////////////////////
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// Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
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/*
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* This function is included primarily as a debugging aid. If Java is
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* running in a console window, then pressing <CTRL-\\> will cause
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* the current state of all active threads and monitors to be written
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* to the console window.
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*/
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JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
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// Copied from classic vm
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// signals_md.c 1.4 98/08/23
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void* newHandler = handler == (void *)2
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? os::user_handler()
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: handler;
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switch (sig) {
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/* The following are already used by the VM. */
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case INTERRUPT_SIGNAL:
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case SIGFPE:
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case SIGILL:
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case SIGSEGV:
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/* The following signal is used by the VM to dump thread stacks unless
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ReduceSignalUsage is set, in which case the user is allowed to set
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his own _native_ handler for this signal; thus, in either case,
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we do not allow JVM_RegisterSignal to change the handler. */
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case BREAK_SIGNAL:
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return (void *)-1;
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/* The following signals are used for Shutdown Hooks support. However, if
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ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
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System.exit(), Java is not allowed to use these signals, and the the
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user is allowed to set his own _native_ handler for these signals and
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invoke System.exit() as needed. Terminator.setup() is avoiding
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registration of these signals when -Xrs is present.
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- If the HUP signal is ignored (from the nohup) command, then Java
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is not allowed to use this signal.
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*/
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case SHUTDOWN1_SIGNAL:
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case SHUTDOWN2_SIGNAL:
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case SHUTDOWN3_SIGNAL:
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if (ReduceSignalUsage) return (void*)-1;
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if (os::Bsd::is_sig_ignored(sig)) return (void*)1;
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}
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void* oldHandler = os::signal(sig, newHandler);
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if (oldHandler == os::user_handler()) {
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return (void *)2;
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} else {
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return oldHandler;
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}
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JVM_END
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JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig))
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if (ReduceSignalUsage) {
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// do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,SHUTDOWN3_SIGNAL,
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// BREAK_SIGNAL to be raised when ReduceSignalUsage is set, since
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// no handler for them is actually registered in JVM or via
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// JVM_RegisterSignal.
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if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
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sig == SHUTDOWN3_SIGNAL || sig == BREAK_SIGNAL) {
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return JNI_FALSE;
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}
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}
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else if ((sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
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sig == SHUTDOWN3_SIGNAL) && os::Bsd::is_sig_ignored(sig)) {
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// do not allow SHUTDOWN1_SIGNAL to be raised when SHUTDOWN1_SIGNAL
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// is ignored, since no handler for them is actually registered in JVM
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// or via JVM_RegisterSignal.
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// This also applies for SHUTDOWN2_SIGNAL and SHUTDOWN3_SIGNAL
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return JNI_FALSE;
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}
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os::signal_raise(sig);
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return JNI_TRUE;
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JVM_END
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/*
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All the defined signal names for Bsd.
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NOTE that not all of these names are accepted by our Java implementation
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Via an existing claim by the VM, sigaction restrictions, or
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the "rules of Unix" some of these names will be rejected at runtime.
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For example the VM sets up to handle USR1, sigaction returns EINVAL for
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STOP, and Bsd simply doesn't allow catching of KILL.
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Here are the names currently accepted by a user of sun.misc.Signal with
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1.4.1 (ignoring potential interaction with use of chaining, etc):
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HUP, INT, TRAP, ABRT, IOT, BUS, USR2, PIPE, ALRM, TERM, STKFLT,
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CLD, CHLD, CONT, TSTP, TTIN, TTOU, URG, XCPU, XFSZ, VTALRM, PROF,
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WINCH, POLL, IO, PWR, SYS
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*/
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struct siglabel {
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const char *name;
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int number;
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};
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struct siglabel siglabels[] = {
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/* derived from /usr/include/bits/signum.h on RH7.2 */
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"HUP", SIGHUP, /* Hangup (POSIX). */
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"INT", SIGINT, /* Interrupt (ANSI). */
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"QUIT", SIGQUIT, /* Quit (POSIX). */
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"ILL", SIGILL, /* Illegal instruction (ANSI). */
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"TRAP", SIGTRAP, /* Trace trap (POSIX). */
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"ABRT", SIGABRT, /* Abort (ANSI). */
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"EMT", SIGEMT, /* EMT trap */
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"FPE", SIGFPE, /* Floating-point exception (ANSI). */
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"KILL", SIGKILL, /* Kill, unblockable (POSIX). */
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"BUS", SIGBUS, /* BUS error (4.2 BSD). */
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"SEGV", SIGSEGV, /* Segmentation violation (ANSI). */
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"SYS", SIGSYS, /* Bad system call. Only on some Bsden! */
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"PIPE", SIGPIPE, /* Broken pipe (POSIX). */
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"ALRM", SIGALRM, /* Alarm clock (POSIX). */
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"TERM", SIGTERM, /* Termination (ANSI). */
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"URG", SIGURG, /* Urgent condition on socket (4.2 BSD). */
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"STOP", SIGSTOP, /* Stop, unblockable (POSIX). */
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"TSTP", SIGTSTP, /* Keyboard stop (POSIX). */
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"CONT", SIGCONT, /* Continue (POSIX). */
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"CHLD", SIGCHLD, /* Child status has changed (POSIX). */
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"TTIN", SIGTTIN, /* Background read from tty (POSIX). */
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"TTOU", SIGTTOU, /* Background write to tty (POSIX). */
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"IO", SIGIO, /* I/O now possible (4.2 BSD). */
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"XCPU", SIGXCPU, /* CPU limit exceeded (4.2 BSD). */
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"XFSZ", SIGXFSZ, /* File size limit exceeded (4.2 BSD). */
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"VTALRM", SIGVTALRM, /* Virtual alarm clock (4.2 BSD). */
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"PROF", SIGPROF, /* Profiling alarm clock (4.2 BSD). */
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"WINCH", SIGWINCH, /* Window size change (4.3 BSD, Sun). */
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"INFO", SIGINFO, /* Information request. */
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"USR1", SIGUSR1, /* User-defined signal 1 (POSIX). */
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"USR2", SIGUSR2 /* User-defined signal 2 (POSIX). */
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};
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JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
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/* find and return the named signal's number */
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for(uint i=0; i<ARRAY_SIZE(siglabels); i++)
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if(!strcmp(name, siglabels[i].name))
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return siglabels[i].number;
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return -1;
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JVM_END
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// used by os::exception_name()
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extern bool signal_name(int signo, char* buf, size_t len) {
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for(uint i = 0; i < ARRAY_SIZE(siglabels); i++) {
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if (signo == siglabels[i].number) {
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jio_snprintf(buf, len, "SIG%s", siglabels[i].name);
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return true;
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}
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}
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return false;
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}
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