1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include <stdio.h>
  25 #include <jni.h>
  26 #include <signal.h>
  27 #include <sys/ucontext.h>
  28 
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32 
  33 void sig_handler(int sig, siginfo_t *info, ucontext_t *context) {
  34 
  35     printf( " HANDLER (1) " );
  36 }
  37 
  38 JNIEXPORT void JNICALL Java_TestJNI_doSomething(JNIEnv *env, jclass klass, jint val) {
  39     struct sigaction act;
  40     struct sigaction oact;
  41 
  42     act.sa_flags = SA_ONSTACK|SA_RESTART|SA_SIGINFO;
  43     sigfillset(&act.sa_mask);
  44     act.sa_handler = SIG_DFL;
  45     act.sa_sigaction = (void (*)())sig_handler;
  46     sigaction(0x20+val, &act, &oact);
  47 
  48     printf( " doSomething(%d) " , val);
  49     printf( " old handler = %p " , oact.sa_handler);
  50 }
  51 
  52 #ifdef __cplusplus
  53 }
  54 #endif
  55