<!-- Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2013 The President and Fellows of Harvard College. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --> <html> <head> <title>crash</title> <body bgcolor=#ffffff> <h2 align=center>crash</h2> <h4 align=center>OS/161 Reference Manual</h4> <h3>Name</h3> <p> crash - commit various exceptions </p> <h3>Synopsis</h3> <p> <tt>/testbin/crash</tt> [<em>operation</em>] </p> <h3>Description</h3> <p> <tt>crash</tt> will perform any one of fourteen illegal processor operations, any one of which should get it killed without causing the whole system to crash. </p> <p> The operations are coded <tt>a</tt> through <tt>n</tt> and may be chosen on the command line. If no operation is chosen, a menu is displayed and a choice solicited. </p> <h3>Restrictions</h3> <p> Test <tt>f</tt>, which writes into the process's own code segment, will only cause a processor exception if you implement read-only code segments. Since this is not required, it is not required that test <tt>f</tt> pass. </p> <p> However, using test <tt>f</tt> must not under any circumstances corrupt the code in the copy of <tt>crash</tt> on disk! </p> <h3>Requirements</h3> <p> <tt>crash</tt> uses the following system calls: <ul> <li> <A HREF=../syscall/read.html>read</A> <li> <A HREF=../syscall/write.html>write</A> <li> <A HREF=../syscall/_exit.html>_exit</A> </ul> </p> <p> <tt>crash</tt> should operate properly once the basic system call assignment is complete. </p> </body> </html>