cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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Util.py (2183B)

      1# Util.py - Python extension for perf script, miscellaneous utility code
      2#
      3# Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
      4#
      5# This software may be distributed under the terms of the GNU General
      6# Public License ("GPL") version 2 as published by the Free Software
      7# Foundation.
      8from __future__ import print_function
      9
     10import errno, os
     11
     12FUTEX_WAIT = 0
     13FUTEX_WAKE = 1
     14FUTEX_PRIVATE_FLAG = 128
     15FUTEX_CLOCK_REALTIME = 256
     16FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
     17
     18NSECS_PER_SEC    = 1000000000
     19
     20def avg(total, n):
     21    return total / n
     22
     23def nsecs(secs, nsecs):
     24    return secs * NSECS_PER_SEC + nsecs
     25
     26def nsecs_secs(nsecs):
     27    return nsecs / NSECS_PER_SEC
     28
     29def nsecs_nsecs(nsecs):
     30    return nsecs % NSECS_PER_SEC
     31
     32def nsecs_str(nsecs):
     33    str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
     34    return str
     35
     36def add_stats(dict, key, value):
     37	if key not in dict:
     38		dict[key] = (value, value, value, 1)
     39	else:
     40		min, max, avg, count = dict[key]
     41		if value < min:
     42			min = value
     43		if value > max:
     44			max = value
     45		avg = (avg + value) / 2
     46		dict[key] = (min, max, avg, count + 1)
     47
     48def clear_term():
     49    print("\x1b[H\x1b[2J")
     50
     51audit_package_warned = False
     52
     53try:
     54	import audit
     55	machine_to_id = {
     56		'x86_64': audit.MACH_86_64,
     57		'alpha'	: audit.MACH_ALPHA,
     58		'ia64'	: audit.MACH_IA64,
     59		'ppc'	: audit.MACH_PPC,
     60		'ppc64'	: audit.MACH_PPC64,
     61		'ppc64le' : audit.MACH_PPC64LE,
     62		's390'	: audit.MACH_S390,
     63		's390x'	: audit.MACH_S390X,
     64		'i386'	: audit.MACH_X86,
     65		'i586'	: audit.MACH_X86,
     66		'i686'	: audit.MACH_X86,
     67	}
     68	try:
     69		machine_to_id['armeb'] = audit.MACH_ARMEB
     70	except:
     71		pass
     72	machine_id = machine_to_id[os.uname()[4]]
     73except:
     74	if not audit_package_warned:
     75		audit_package_warned = True
     76		print("Install the audit-libs-python package to get syscall names.\n"
     77                    "For example:\n  # apt-get install python-audit (Ubuntu)"
     78                    "\n  # yum install audit-libs-python (Fedora)"
     79                    "\n  etc.\n")
     80
     81def syscall_name(id):
     82	try:
     83		return audit.audit_syscall_to_name(id, machine_id)
     84	except:
     85		return str(id)
     86
     87def strerror(nr):
     88	try:
     89		return errno.errorcode[abs(nr)]
     90	except:
     91		return "Unknown %d errno" % nr