contrib/jit-coverage-report.py

   1 #! /usr/bin/python
   2 #
   3 # Print a report on which libgccjit.so symbols are used in which test
   4 # cases, and which lack test coverage.  Tested with Python 2.7 and 3.2
   5 # To be run from the root directory of the source tree.
   6 #
   7 # Copyright (C) 2014 Free Software Foundation, Inc.
   8 # Written by David Malcolm <dmalcolm@redhat.com>.
   9 #
  10 # This script is Free Software, and it can be copied, distributed and
  11 # modified as defined in the GNU General Public License.  A copy of
  12 # its license can be downloaded from http://www.gnu.org/copyleft/gpl.html
  13
  14 from collections import Counter
  15 import glob
  16 import re
  17 import sys
  18
  19 def parse_map_file(path):
  20     """
  21     Parse libgccjit.map, returning the symbols in the API as a list of str.
  22     """
  23     syms = []
  24     with open(path) as f:
  25         for line in f:
  26             m = re.match('^\s+([a-z_]+);$', line)
  27             if m:
  28                 syms.append(m.group(1))
  29     return syms
  30
  31 def parse_test_case(path):
  32     """
  33     Locate all symbol-like things in a C test case, yielding
  34     them as a sequence of str.
  35     """
  36     with open(path) as f:
  37         for line in f:
  38             for m in re.finditer('([_A-Za-z][_A-Za-z0-9]*)', line):
  39                 yield m.group(1)
  40
  41 def find_test_cases():
  42     for path in glob.glob('gcc/testsuite/jit.dg/*.[ch]'):
  43         yield path
  44
  45 api_syms = parse_map_file('gcc/jit/libgccjit.map')
  46
  47 syms_in_test_cases = {}
  48 for path in find_test_cases():
  49     syms_in_test_cases[path] = list(parse_test_case(path))
  50
  51 uses = Counter()
  52 for sym in sorted(api_syms):
  53     print('symbol: %s' % sym)
  54     uses[sym] = 0
  55     for path in syms_in_test_cases:
  56         count = syms_in_test_cases[path].count(sym)
  57         uses[sym] += count
  58         if count:
  59             print('  uses in %s: %i' % (path, count))
  60     if uses[sym] == 0:
  61         print('  NEVER USED')
  62     sys.stdout.write('\n')
  63
  64 layout = '%40s  %5s  %s'
  65 print(layout % ('SYMBOL', 'USES', 'HISTOGRAM'))
  66 for sym, count in uses.most_common():
  67     print(layout % (sym, count, '*' * count if count else 'UNUSED'))