contrib/filter-rtags-warnings.py

   1 #!/usr/bin/env python3
   2 #
   3 # Script to analyze warnings produced by rtags command (using LLVM):
   4 # rc --diagnose-all --synchronous-diagnostics --json
   5 #
   6 # This file is part of GCC.
   7 #
   8 # GCC is free software; you can redistribute it and/or modify it under
   9 # the terms of the GNU General Public License as published by the Free
  10 # Software Foundation; either version 3, or (at your option) any later
  11 # version.
  12 #
  13 # GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 # WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 # for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with GCC; see the file COPYING3.  If not see
  20 # <http://www.gnu.org/licenses/>.  */
  21 #
  22 #
  23 #
  24
  25 import sys
  26 import json
  27 import argparse
  28
  29 def skip_warning(filename, warning):
  30     ignores = {
  31             '': ['-Warray-bounds', '-Wmismatched-tags', 'gcc_gfc: -Wignored-attributes', '-Wchar-subscripts',
  32                 'string literal (potentially insecure): -Wformat-security', '-Wdeprecated-register',
  33                 '-Wvarargs', 'keyword is hidden by macro definition', "but the argument has type 'char *': -Wformat-pedantic",
  34                 '-Wnested-anon-types', 'qualifier in explicit instantiation of', 'attribute argument not supported: asm_fprintf'],
  35             'insn-modes.c': ['-Wshift-count-overflow'],
  36             'insn-emit.c': ['-Wtautological-compare'],
  37             'insn-attrtab.c': ['-Wparentheses-equality'],
  38             'gimple-match.c': ['-Wunused-', '-Wtautological-compare'],
  39             'generic-match.c': ['-Wunused-', '-Wtautological-compare'],
  40     }
  41
  42     message = warning['message']
  43
  44     if warning['type'] == 'fixit':
  45         return True
  46
  47     for name, ignores in ignores.items():
  48         for i in ignores:
  49             if name in filename and i in message:
  50                 return True
  51
  52     return False
  53
  54 parser = argparse.ArgumentParser()
  55 parser.add_argument('json_file', help = 'Rtags JSON file with diagnostics')
  56 parser.add_argument('-n', '--no-filter', action = 'store_true', help = 'No filter')
  57
  58 args = parser.parse_args()
  59
  60 data = json.load(open(args.json_file))
  61 file_warnings = data['checkStyle']
  62
  63 total = 0
  64 for filename, warnings in file_warnings.items():
  65     if warnings:
  66         for w in warnings:
  67             if args.no_filter or not skip_warning(filename, w):
  68                 total += 1
  69                 print('%s:%d:%d:%s' % (filename, w['line'], w['column'], w['message']))
  70
  71 print('Total: %d' % total)