linux/arch/ia64/scripts/unwcheck.py
Masahiro Yamada d8d2d38275 kbuild: remove PYTHON variable
Python retired in 2020, and some distributions do not provide the
'python' command any more.

As in commit 51839e29cb ("scripts: switch explicitly to Python 3"),
we need to use more specific 'python3' to invoke scripts even if they
are written in a way compatible with both Python 2 and 3.

This commit removes the variable 'PYTHON', and switches the existing
users to 'PYTHON3'.

BTW, PEP 394 (https://www.python.org/dev/peps/pep-0394/) is a helpful
material.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2021-02-01 10:37:19 +09:00

65 lines
1.7 KiB
Python

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# Usage: unwcheck.py FILE
#
# This script checks the unwind info of each function in file FILE
# and verifies that the sum of the region-lengths matches the total
# length of the function.
#
# Based on a shell/awk script originally written by Harish Patil,
# which was converted to Perl by Matthew Chapman, which was converted
# to Python by David Mosberger.
#
import os
import re
import sys
if len(sys.argv) != 2:
print("Usage: %s FILE" % sys.argv[0])
sys.exit(2)
readelf = os.getenv("READELF", "readelf")
start_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]")
rlen_pattern = re.compile(".*rlen=([0-9]+)")
def check_func (func, slots, rlen_sum):
if slots != rlen_sum:
global num_errors
num_errors += 1
if not func: func = "[%#x-%#x]" % (start, end)
print("ERROR: %s: %lu slots, total region length = %lu" % (func, slots, rlen_sum))
return
num_funcs = 0
num_errors = 0
func = False
slots = 0
rlen_sum = 0
for line in os.popen("%s -u %s" % (readelf, sys.argv[1])):
m = start_pattern.match(line)
if m:
check_func(func, slots, rlen_sum)
func = m.group(1)
start = int(m.group(2), 16)
end = int(m.group(3), 16)
slots = 3 * (end - start) / 16
rlen_sum = 0
num_funcs += 1
else:
m = rlen_pattern.match(line)
if m:
rlen_sum += int(m.group(1))
check_func(func, slots, rlen_sum)
if num_errors == 0:
print("No errors detected in %u functions." % num_funcs)
else:
if num_errors > 1:
err="errors"
else:
err="error"
print("%u %s detected in %u functions." % (num_errors, err, num_funcs))
sys.exit(1)