c9c9e50155
Previously, we were relying on subpage allocator failing to signal that forkbomb was succeeding. However, there are cases where the subpage allocator never fails but the test is still progressing fine. This commit moves the secure print into forkbomb itself and changes the test constraints to ensure that forkbomb runs for a certain amount of time without crashing
89 lines
3.0 KiB
C
89 lines
3.0 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
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* The President and Fellows of Harvard College.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* forkbomb - apply malthus to an operating system ;-)
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*
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* DO NOT RUN THIS ON A REAL SYSTEM - IT WILL GRIND TO A HALT AND
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* PEOPLE WILL COME AFTER YOU WIELDING BASEBALL BATS OR THE AD
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* BOARD(*). WE WARNED YOU.
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*
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* We don't expect your system to withstand this without grinding to
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* a halt, but once your basic system calls are complete it shouldn't
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* crash. Likewise for after your virtual memory system is complete.
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*
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* (...at least in an ideal world. However, it can be difficult to
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* handle all the loose ends involved. Heroic measures are not
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* expected. If in doubt, talk to the course staff.)
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*
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*
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* (*) The Administrative Board of Harvard College handles formal
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* disciplinary action.
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*/
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#include <unistd.h>
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#include <err.h>
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#include <time.h>
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#include <test161/test161.h>
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#define TEST_DURATION 10
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static volatile int pid;
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int
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main(void)
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{
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int i;
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time_t start_time_s, time_now_s;
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unsigned long start_time_ns, time_now_ns;
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__time(&start_time_s, &start_time_ns);
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while (1) {
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fork();
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__time(&time_now_s, &time_now_ns);
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if(time_now_s - start_time_s > TEST_DURATION) {
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success(TEST161_SUCCESS, SECRET, "/testbin/forkbomb");
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}
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pid = getpid();
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/* Make sure each fork has its own address space. */
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for (i=0; i<300; i++) {
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volatile int seenpid;
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seenpid = pid;
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if (seenpid != getpid()) {
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errx(1, "pid mismatch (%d, should be %d) "
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"- your vm is broken!",
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seenpid, getpid());
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}
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}
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}
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}
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