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