mirror of
https://github.com/openjdk/jdk.git
synced 2025-08-28 15:24:43 +02:00
8203822: AIX version of jsig.c was not removed in JDK-8200298
Reviewed-by: erikj
This commit is contained in:
Magnus Ihse Bursie
parent
a78fe0a073
commit
628aec8c75
1 changed files with 0 additions and 238 deletions
|
|
@ -1,238 +0,0 @@
|
||||||
/*
|
|
||||||
* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
|
|
||||||
* Copyright (c) 2012, 2015 SAP SE. All rights reserved.
|
|
||||||
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
||||||
*
|
|
||||||
* This code is free software; you can redistribute it and/or modify it
|
|
||||||
* under the terms of the GNU General Public License version 2 only, as
|
|
||||||
* published by the Free Software Foundation.
|
|
||||||
*
|
|
||||||
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
||||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
||||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
||||||
* version 2 for more details (a copy is included in the LICENSE file that
|
|
||||||
* accompanied this code).
|
|
||||||
*
|
|
||||||
* You should have received a copy of the GNU General Public License version
|
|
||||||
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
||||||
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
||||||
*
|
|
||||||
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
||||||
* or visit www.oracle.com if you need additional information or have any
|
|
||||||
* questions.
|
|
||||||
*
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* CopyrightVersion 1.2 */
|
|
||||||
|
|
||||||
/* This is a special library that should be loaded before libc &
|
|
||||||
* libthread to interpose the signal handler installation functions:
|
|
||||||
* sigaction(), signal(), sigset().
|
|
||||||
* Used for signal-chaining. See RFE 4381843.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <signal.h>
|
|
||||||
#include <dlfcn.h>
|
|
||||||
#include <pthread.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
#include <stdlib.h>
|
|
||||||
#include <stdint.h>
|
|
||||||
#include "jni.h"
|
|
||||||
|
|
||||||
#define bool int
|
|
||||||
#define true 1
|
|
||||||
#define false 0
|
|
||||||
|
|
||||||
static struct sigaction sact[NSIG]; /* saved signal handlers */
|
|
||||||
static sigset_t jvmsigs; /* Signals used by jvm. */
|
|
||||||
|
|
||||||
/* Used to synchronize the installation of signal handlers. */
|
|
||||||
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
||||||
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
|
|
||||||
static pthread_t tid = 0;
|
|
||||||
|
|
||||||
typedef void (*sa_handler_t)(int);
|
|
||||||
typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
|
|
||||||
// signal_t is already defined on AIX.
|
|
||||||
typedef sa_handler_t (*signal_like_function_t)(int, sa_handler_t);
|
|
||||||
typedef int (*sigaction_t)(int, const struct sigaction *, struct sigaction *);
|
|
||||||
|
|
||||||
static signal_like_function_t os_signal = 0; /* os's version of signal()/sigset() */
|
|
||||||
static sigaction_t os_sigaction = 0; /* os's version of sigaction() */
|
|
||||||
|
|
||||||
static bool jvm_signal_installing = false;
|
|
||||||
static bool jvm_signal_installed = false;
|
|
||||||
|
|
||||||
static void signal_lock() {
|
|
||||||
pthread_mutex_lock(&mutex);
|
|
||||||
/* When the jvm is installing its set of signal handlers, threads
|
|
||||||
* other than the jvm thread should wait. */
|
|
||||||
if (jvm_signal_installing) {
|
|
||||||
if (tid != pthread_self()) {
|
|
||||||
pthread_cond_wait(&cond, &mutex);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
static void signal_unlock() {
|
|
||||||
pthread_mutex_unlock(&mutex);
|
|
||||||
}
|
|
||||||
|
|
||||||
static sa_handler_t call_os_signal(int sig, sa_handler_t disp,
|
|
||||||
bool is_sigset) {
|
|
||||||
if (os_signal == NULL) {
|
|
||||||
if (!is_sigset) {
|
|
||||||
// Aix: call functions directly instead of dlsym'ing them.
|
|
||||||
os_signal = signal;
|
|
||||||
} else {
|
|
||||||
// Aix: call functions directly instead of dlsym'ing them.
|
|
||||||
os_signal = sigset;
|
|
||||||
}
|
|
||||||
if (os_signal == NULL) {
|
|
||||||
printf("%s\n", dlerror());
|
|
||||||
exit(0);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return (*os_signal)(sig, disp);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void save_signal_handler(int sig, sa_handler_t disp) {
|
|
||||||
sigset_t set;
|
|
||||||
sact[sig].sa_handler = disp;
|
|
||||||
sigemptyset(&set);
|
|
||||||
sact[sig].sa_mask = set;
|
|
||||||
sact[sig].sa_flags = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static sa_handler_t set_signal(int sig, sa_handler_t disp, bool is_sigset) {
|
|
||||||
sa_handler_t oldhandler;
|
|
||||||
bool sigused;
|
|
||||||
|
|
||||||
signal_lock();
|
|
||||||
|
|
||||||
sigused = sigismember(&jvmsigs, sig);
|
|
||||||
if (jvm_signal_installed && sigused) {
|
|
||||||
/* jvm has installed its signal handler for this signal. */
|
|
||||||
/* Save the handler. Don't really install it. */
|
|
||||||
oldhandler = sact[sig].sa_handler;
|
|
||||||
save_signal_handler(sig, disp);
|
|
||||||
|
|
||||||
signal_unlock();
|
|
||||||
return oldhandler;
|
|
||||||
} else if (jvm_signal_installing) {
|
|
||||||
/* jvm is installing its signal handlers. Install the new
|
|
||||||
* handlers and save the old ones. jvm uses sigaction().
|
|
||||||
* Leave the piece here just in case. */
|
|
||||||
oldhandler = call_os_signal(sig, disp, is_sigset);
|
|
||||||
save_signal_handler(sig, oldhandler);
|
|
||||||
|
|
||||||
/* Record the signals used by jvm */
|
|
||||||
sigaddset(&jvmsigs, sig);
|
|
||||||
|
|
||||||
signal_unlock();
|
|
||||||
return oldhandler;
|
|
||||||
} else {
|
|
||||||
/* jvm has no relation with this signal (yet). Install the
|
|
||||||
* the handler. */
|
|
||||||
oldhandler = call_os_signal(sig, disp, is_sigset);
|
|
||||||
|
|
||||||
signal_unlock();
|
|
||||||
return oldhandler;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
JNIEXPORT sa_handler_t JNICALL
|
|
||||||
signal(int sig, sa_handler_t disp) {
|
|
||||||
return set_signal(sig, disp, false);
|
|
||||||
}
|
|
||||||
|
|
||||||
JNIEXPORT sa_handler_t JNICALL
|
|
||||||
sigset(int sig, sa_handler_t disp) {
|
|
||||||
return set_signal(sig, disp, true);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int call_os_sigaction(int sig, const struct sigaction *act,
|
|
||||||
struct sigaction *oact) {
|
|
||||||
if (os_sigaction == NULL) {
|
|
||||||
// Aix: call functions directly instead of dlsym'ing them.
|
|
||||||
os_sigaction = sigaction;
|
|
||||||
if (os_sigaction == NULL) {
|
|
||||||
printf("%s\n", dlerror());
|
|
||||||
exit(0);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return (*os_sigaction)(sig, act, oact);
|
|
||||||
}
|
|
||||||
|
|
||||||
JNIEXPORT int JNICALL
|
|
||||||
sigaction(int sig, const struct sigaction *act, struct sigaction *oact) {
|
|
||||||
int res;
|
|
||||||
bool sigused;
|
|
||||||
struct sigaction oldAct;
|
|
||||||
|
|
||||||
signal_lock();
|
|
||||||
|
|
||||||
sigused = sigismember(&jvmsigs, sig);
|
|
||||||
if (jvm_signal_installed && sigused) {
|
|
||||||
/* jvm has installed its signal handler for this signal. */
|
|
||||||
/* Save the handler. Don't really install it. */
|
|
||||||
if (oact != NULL) {
|
|
||||||
*oact = sact[sig];
|
|
||||||
}
|
|
||||||
if (act != NULL) {
|
|
||||||
sact[sig] = *act;
|
|
||||||
}
|
|
||||||
|
|
||||||
signal_unlock();
|
|
||||||
return 0;
|
|
||||||
} else if (jvm_signal_installing) {
|
|
||||||
/* jvm is installing its signal handlers. Install the new
|
|
||||||
* handlers and save the old ones. */
|
|
||||||
res = call_os_sigaction(sig, act, &oldAct);
|
|
||||||
sact[sig] = oldAct;
|
|
||||||
if (oact != NULL) {
|
|
||||||
*oact = oldAct;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Record the signals used by jvm. */
|
|
||||||
sigaddset(&jvmsigs, sig);
|
|
||||||
|
|
||||||
signal_unlock();
|
|
||||||
return res;
|
|
||||||
} else {
|
|
||||||
/* jvm has no relation with this signal (yet). Install the
|
|
||||||
* the handler. */
|
|
||||||
res = call_os_sigaction(sig, act, oact);
|
|
||||||
|
|
||||||
signal_unlock();
|
|
||||||
return res;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/* The three functions for the jvm to call into. */
|
|
||||||
JNIEXPORT void JNICALL
|
|
||||||
JVM_begin_signal_setting() {
|
|
||||||
signal_lock();
|
|
||||||
sigemptyset(&jvmsigs);
|
|
||||||
jvm_signal_installing = true;
|
|
||||||
tid = pthread_self();
|
|
||||||
signal_unlock();
|
|
||||||
}
|
|
||||||
|
|
||||||
JNIEXPORT void JNICALL
|
|
||||||
JVM_end_signal_setting() {
|
|
||||||
signal_lock();
|
|
||||||
jvm_signal_installed = true;
|
|
||||||
jvm_signal_installing = false;
|
|
||||||
pthread_cond_broadcast(&cond);
|
|
||||||
signal_unlock();
|
|
||||||
}
|
|
||||||
|
|
||||||
JNIEXPORT struct sigaction * JNICALL
|
|
||||||
JVM_get_signal_action(int sig) {
|
|
||||||
/* Does race condition make sense here? */
|
|
||||||
if (sigismember(&jvmsigs, sig)) {
|
|
||||||
return &sact[sig];
|
|
||||||
}
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue