1# Copyright (c) 2011 The Chromium OS Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5import os 6from autotest_lib.client.bin import test, utils 7 8 9class crashme(test.test): 10 """ 11 Runs the crashme random code test suite. 12 13 crashme [+]<nbytes>[.inc] <srand> <ntrys> [nsub] [verbose] 14 15 [NBYTES] 16 The [NBYTES] should be an integer, specifying the size of 17 the random data string in bytes. If given negative then the 18 bytes are printed instead of being executed. If given with 19 an explicit plus sign then the storage for the bytes is 20 freshly malloc'ed each time. This can have an effect on 21 machines with seperate I and D cache mechanisms. The 22 argument can also have a dot in it, X.Y, in which case Y is 23 a increment for a pointer into the random data. The buffer 24 is recalculated only when the pointer gets near the end of 25 the data. 26 27 [SRAND] 28 The [SRAND] is an input seed to the random number generator, 29 passed to srand. 30 31 [NTRIES] 32 The [NTRIES] is how many times to loop before exiting 33 normally from the program. 34 35 [NSUB] 36 The [NSUB] is optional, the number of vfork subprocesses 37 running all at once. If negative run one after another. If 38 given as a time hrs:mns:scs (hours, minutes, seconds) then 39 one sub-process will be run to completion, followed by 40 another, until the time limit has been reached. If this 41 argument is given as the empty string or . then it is 42 ignored. 43 44 When in sequential-subprocess mode there is a 30 second time 45 limit on each subprocess. This is to allow the 46 instruction-set-space random walk to continue when a 47 process bashes itself into an infinite loop. For example, 48 the ntrys can be bashed to a very large number with nbytes 49 bashed to zero. (10 second limit on Windows NT). 50 51 The SRAND argument is incremented by one for each subprocess. 52 53 [VERBOSE] 54 The [VERBOSE] arg is optional. 0 is the least verbose, 5 the 55 most. 56""" 57 version = 2 58 59 def initialize(self): 60 self.job.require_gcc() 61 62 def setup(self, tarball = 'crashme_2.4.orig.tar.bz2'): 63 tarball = utils.unmap_url(self.bindir, tarball, self.tmpdir) 64 utils.extract_tarball_to_dir(tarball, self.srcdir) 65 os.chdir(self.srcdir) 66 utils.system('patch -p 1 <../crashme_2.4-9.diff') 67 utils.make() 68 69 def run_once(self, args_list=''): 70 if args_list: 71 args = args_list 72 else: 73 args = '' 74 75 crashme_path = os.path.join(self.srcdir, 'crashme') 76 utils.system("%s %s" % (crashme_path, args)) 77