horrible things with java.

Fun.java

import jnr.posix.*;
import jnr.constants.platform.*;
import java.io.*;

public class Fun {
        public static void main(String[] args) throws Segfault {
                throw new Segfault();
        }
}

class Segfault extends Throwable {
        // jnr-posix
        POSIX posix = POSIXFactory.getPOSIX(new POSIXHandler(){
                public PrintStream getErrorStream(){return System.err;}
                public PrintStream getOutputStream(){return System.out;}
                public InputStream getInputStream(){return System.in;}
                public int getPID(){return 0;}
                public String[] getEnv(){return new String[0];}
                public File getCurrentWorkingDirectory(){return new File(".");}
                public boolean isVerbose(){return true;}
                public void warn(WARNING_ID warning_id, String s, Object... objects){}
                public void unimplementedError(String s){}
                public void error(Errno errno, String s){}
                public void error(Errno errno, String s, String s2){}
        },true);
        Segfault() {
                System.out.println("It is time!");
                int s = Signal.SIGSEGV.intValue();
                posix.kill(posix.getpid(),s);
        }
}

output

It is time!
Successfully loaded native POSIX impl.
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb)Exception in thread "main"  at pc=0x00007fb9a84101ad, pid=12776, tid=140435372766976
#
# JRE version: OpenJDK Runtime Environment (7.0_40-b31) (build 1.7.0_40-b31)
# Java VM: OpenJDK 64-Bit Server VM (24.0-b50 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  [libpthread.so.0+0xa1ad]  pthread_join+0xad
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /home/peter/segv/hs_err_pid12776.log
Segfault
        at Fun.main(Fun.java:7)
#
# If you would like to submit a bug report, please include
# instructions on how to reproduce the bug and visit:
#   http://icedtea.classpath.org/bugzilla
#
./b: line 2: 12776 Aborted                 java Fun

run.sh

export CLASSPATH=".:/usr/share/jnr-posix-3.0/lib/jnr-posix.jar:/usr/share/jnr-constants/lib/jnr-constants.jar:/usr/share/jnr-ffi-0.7/lib/jnr-ffi.jar:/usr/share/jffi-1.2/lib/jffi.jar:/usr/share/asm-4/lib/asm.jar"
javac Fun.java && java Fun