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1 #!/usr/bin/env python3
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2 #
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3 # Script to analyze warnings produced by clang.
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4 #
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5 # This file is part of GCC.
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6 #
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7 # GCC is free software; you can redistribute it and/or modify it under
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8 # the terms of the GNU General Public License as published by the Free
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9 # Software Foundation; either version 3, or (at your option) any later
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10 # version.
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11 #
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12 # GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 # for more details.
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16 #
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17 # You should have received a copy of the GNU General Public License
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18 # along with GCC; see the file COPYING3. If not see
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19 # <http://www.gnu.org/licenses/>. */
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20 #
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21 #
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22 #
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23
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24 import sys
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25 import argparse
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26
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27 def skip_warning(filename, message):
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28 ignores = {
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29 '': ['-Warray-bounds', '-Wmismatched-tags', 'gcc_gfc: -Wignored-attributes', '-Wchar-subscripts',
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30 'string literal (potentially insecure): -Wformat-security', '-Wdeprecated-register',
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31 '-Wvarargs', 'keyword is hidden by macro definition', "but the argument has type 'char *': -Wformat-pedantic",
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32 '-Wnested-anon-types', 'qualifier in explicit instantiation of', 'attribute argument not supported: asm_fprintf',
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33 'when in C++ mode, this behavior is deprecated', '-Wignored-attributes', '-Wgnu-zero-variadic-macro-arguments',
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34 '-Wformat-security'],
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35 'insn-modes.c': ['-Wshift-count-overflow'],
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36 'insn-emit.c': ['-Wtautological-compare'],
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37 'insn-attrtab.c': ['-Wparentheses-equality'],
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38 'gimple-match.c': ['-Wunused-', '-Wtautological-compare'],
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39 'generic-match.c': ['-Wunused-', '-Wtautological-compare'],
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40 'i386.md': ['-Wparentheses-equality', '-Wtautological-compare'],
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41 'sse.md': ['-Wparentheses-equality', '-Wtautological-compare'],
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42 'genautomata.c': ['-Wstring-plus-int']
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43
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44 }
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45
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46 for name, ignores in ignores.items():
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47 for i in ignores:
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48 if name in filename and i in message:
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49 return True
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50
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51 return False
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52
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53 parser = argparse.ArgumentParser()
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54 parser.add_argument('log', help = 'Log file with clang warnings')
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55 args = parser.parse_args()
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56
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57 lines = [l.strip() for l in open(args.log)]
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58 total = 0
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59 messages = []
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60 for l in lines:
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61 token = ': warning: '
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62 i = l.find(token)
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63 if i != -1:
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64 location = l[:i]
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65 message = l[i + len(token):]
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66 if not skip_warning(location, message):
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67 total += 1
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68 messages.append(l)
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69
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70 for l in sorted(messages):
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71 print(l)
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72 print('\nTotal warnings: %d' % total)
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