Category Archives: OS&Runtime

什么是JVM的崩溃呢？
JVM已经无法抛出异常了，你会看到这样的错误

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_STACK_OVERFLOW (0xc00000fd) at pc=0x6d8a99c6, pid=2572, tid=964
#
# JRE version: 6.0_22-b04
# Java VM: Java HotSpot(TM) Client VM (17.1-b03 mixed mode, sharing windows-x86
)
# Problematic frame:
# V  [jvm.dll+0x99c6]
#
# An error report file with more information is saved as:
# D:\E\Projects\Java\Crash\hs_err_pid2572.log
#
# If you would like to submit a bug report, please visit:
#   http://java.sun.com/webapps/bugreport/crash.jsp
#

同时会生成hs_err_pidxxxx.log的日志文件。

怎么把JVM弄崩溃呢？
总结了一下，感觉有三种方法
1是利用编译器及JVM自身特性，导致不可恢复的灾难；
2是利用JDK或JVM的bug;
3是用JNI，让JVM鞭长莫及，无论是sun提供的，还是我们自己写的;

import sun.dc.pr.PathDasher; 
import sun.misc.Unsafe;

//方法1
//我最认可的方法
public static void main(String[] args) {
    Object[] o = null;
    while (true) {
        o = new Object[] { o };
    }
}

//方法2
//JDK1.6u23 以前版本中的bug
public static void main(String[] args) {
    Double.parseDouble("2.2250738585072012e-308");
}

//方法3
//JNI
public static void main(String[] args)
{    
    PathDasher dasher = new PathDasher(null) ;
}

//方法4
//JNI
//java -Xbootclasspath/p:. Crash
private static final Unsafe unsafe = Unsafe.getUnsafe();
public static void crash()
{
    unsafe.putAddress(0, 0);
}

public static void main(String[] args) {
    crash();
}