1*4882a593Smuzhiyun#!/usr/bin/env python 2*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 3*4882a593Smuzhiyun# 4*4882a593Smuzhiyun# Usage: unwcheck.py FILE 5*4882a593Smuzhiyun# 6*4882a593Smuzhiyun# This script checks the unwind info of each function in file FILE 7*4882a593Smuzhiyun# and verifies that the sum of the region-lengths matches the total 8*4882a593Smuzhiyun# length of the function. 9*4882a593Smuzhiyun# 10*4882a593Smuzhiyun# Based on a shell/awk script originally written by Harish Patil, 11*4882a593Smuzhiyun# which was converted to Perl by Matthew Chapman, which was converted 12*4882a593Smuzhiyun# to Python by David Mosberger. 13*4882a593Smuzhiyun# 14*4882a593Smuzhiyunimport os 15*4882a593Smuzhiyunimport re 16*4882a593Smuzhiyunimport sys 17*4882a593Smuzhiyun 18*4882a593Smuzhiyunif len(sys.argv) != 2: 19*4882a593Smuzhiyun print("Usage: %s FILE" % sys.argv[0]) 20*4882a593Smuzhiyun sys.exit(2) 21*4882a593Smuzhiyun 22*4882a593Smuzhiyunreadelf = os.getenv("READELF", "readelf") 23*4882a593Smuzhiyun 24*4882a593Smuzhiyunstart_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]") 25*4882a593Smuzhiyunrlen_pattern = re.compile(".*rlen=([0-9]+)") 26*4882a593Smuzhiyun 27*4882a593Smuzhiyundef check_func (func, slots, rlen_sum): 28*4882a593Smuzhiyun if slots != rlen_sum: 29*4882a593Smuzhiyun global num_errors 30*4882a593Smuzhiyun num_errors += 1 31*4882a593Smuzhiyun if not func: func = "[%#x-%#x]" % (start, end) 32*4882a593Smuzhiyun print("ERROR: %s: %lu slots, total region length = %lu" % (func, slots, rlen_sum)) 33*4882a593Smuzhiyun return 34*4882a593Smuzhiyun 35*4882a593Smuzhiyunnum_funcs = 0 36*4882a593Smuzhiyunnum_errors = 0 37*4882a593Smuzhiyunfunc = False 38*4882a593Smuzhiyunslots = 0 39*4882a593Smuzhiyunrlen_sum = 0 40*4882a593Smuzhiyunfor line in os.popen("%s -u %s" % (readelf, sys.argv[1])): 41*4882a593Smuzhiyun m = start_pattern.match(line) 42*4882a593Smuzhiyun if m: 43*4882a593Smuzhiyun check_func(func, slots, rlen_sum) 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun func = m.group(1) 46*4882a593Smuzhiyun start = int(m.group(2), 16) 47*4882a593Smuzhiyun end = int(m.group(3), 16) 48*4882a593Smuzhiyun slots = 3 * (end - start) / 16 49*4882a593Smuzhiyun rlen_sum = 0 50*4882a593Smuzhiyun num_funcs += 1 51*4882a593Smuzhiyun else: 52*4882a593Smuzhiyun m = rlen_pattern.match(line) 53*4882a593Smuzhiyun if m: 54*4882a593Smuzhiyun rlen_sum += int(m.group(1)) 55*4882a593Smuzhiyuncheck_func(func, slots, rlen_sum) 56*4882a593Smuzhiyun 57*4882a593Smuzhiyunif num_errors == 0: 58*4882a593Smuzhiyun print("No errors detected in %u functions." % num_funcs) 59*4882a593Smuzhiyunelse: 60*4882a593Smuzhiyun if num_errors > 1: 61*4882a593Smuzhiyun err="errors" 62*4882a593Smuzhiyun else: 63*4882a593Smuzhiyun err="error" 64*4882a593Smuzhiyun print("%u %s detected in %u functions." % (num_errors, err, num_funcs)) 65*4882a593Smuzhiyun sys.exit(1) 66