afl-sancov.py 文件源码

def parent_identical_or_crashes(self, crash, parent):

        # Base names
        cbasename = os.path.basename(crash)
        pbasename = os.path.basename(parent)

        ## Filter queue filenames with sig info
        if self.find_crash_parent_regex.match(pbasename):
            self.logr("Parent ({}) looks like crashing input!".format(pbasename))
            return True

        try:
            diff_out = subprocess.check_output("diff -q {} {}".format(crash, parent),
                                               stderr=subprocess.STDOUT, shell=True)
        except Exception, e:
            diff_out = e.output

        if not diff_out.rstrip("\n"):
            self.logr("Crash file ({}) and parent ({}) are identical!"
                      .format(cbasename, pbasename))
            return True

        cov_cmd = self.args.coverage_cmd.replace('AFL_FILE', parent)

        ### Dry-run to make sure parent doesn't cause a crash
        if self.does_dry_run_throw_error(cov_cmd):
            self.logr("Parent ({}) crashes binary!".format(pbasename))
            return True

        return False