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65 lines
1.7 KiB
65 lines
1.7 KiB
#!/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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