jdk

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/*
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 * Copyright (c) 2013, 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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#include <stdio.h>
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#include <jni.h>
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#include <signal.h>
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#include <sys/ucontext.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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void sig_handler(int sig, siginfo_t *info, ucontext_t *context) {
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    printf( " HANDLER (1) " );
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}
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JNIEXPORT void JNICALL Java_TestJNI_doSomething(JNIEnv *env, jclass klass, jint val) {
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    struct sigaction act;
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    struct sigaction oact;
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    act.sa_flags = SA_ONSTACK|SA_RESTART|SA_SIGINFO;
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    sigfillset(&act.sa_mask);
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    act.sa_handler = SIG_DFL;
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    act.sa_sigaction = (void (*)())sig_handler;
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    sigaction(0x20+val, &act, &oact);
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    printf( " doSomething(%d) " , val);
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    printf( " old handler = %p " , oact.sa_handler);
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}
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#ifdef __cplusplus
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}
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#endif
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