blob: 7a99344d6651423e5dd094b0588700d7c180d24d [file] [log] [blame]
hwg6461fc62015-03-04 10:46:28 +08001#! /usr/bin/env python
2# -*- coding: utf-8 -*-
3
4# Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are met:
8# * Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10# * Redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution.
13# * Neither the name of The Linux Foundation nor
14# the names of its contributors may be used to endorse or promote
15# products derived from this software without specific prior written
16# permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20# IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21# NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
22# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30# Invoke gcc, looking for warnings, and causing a failure if there are
31# non-whitelisted warnings.
32
33import errno
34import re
35import os
36import sys
37import subprocess
38
39# Note that gcc uses unicode, which may depend on the locale. TODO:
40# force LANG to be set to en_US.UTF-8 to get consistent warnings.
41
42allowed_warnings = set([
Huang, Tao7a51384d2015-11-21 19:40:34 +080043 "core.c:142", # drivers/regulator/core.c:142:6: warning: unused variable 'i'
44 "posix-cpu-timers.c:1268", # kernel/time/posix-cpu-timers.c:1268:13: warning: 'now' may be used uninitialized in this function
45 "af_unix.c:910", # net/unix/af_unix.c:910:20: warning: 'hash' may be used uninitialized in this function
46 "sunxi_sram.c:214", # drivers/soc/sunxi/sunxi_sram.c:214:24: warning: 'device' may be used uninitialized in this function
47 "ks8851.c:298", # drivers/net/ethernet/micrel/ks8851.c:298:2: warning: 'rxb[0]' may be used uninitialized in this function
48 "ks8851.c:421", # drivers/net/ethernet/micrel/ks8851.c:421:20: warning: 'rxb[0]' may be used uninitialized in this function
49 "rockchip_drm_vop.c:581", # drivers/gpu/drm/rockchip/rockchip_drm_vop.c:581:49: warning: 'vskiplines' may be used uninitialized in this function
hwg6461fc62015-03-04 10:46:28 +080050 ])
51
52# Capture the name of the object file, can find it.
53ofile = None
54
55warning_re = re.compile(r'''(.*/|)([^/]+\.[a-z]+:\d+):(\d+:)? warning:''')
56def interpret_warning(line):
57 """Decode the message from gcc. The messages we care about have a filename, and a warning"""
58 line = line.rstrip('\n')
59 m = warning_re.match(line)
60 if m and m.group(2) not in allowed_warnings:
61 print "error, forbidden warning:", m.group(2)
62
63 # If there is a warning, remove any object if it exists.
64 if ofile:
65 try:
66 os.remove(ofile)
67 except OSError:
68 pass
69 sys.exit(1)
70
71def run_gcc():
72 args = sys.argv[1:]
73 # Look for -o
74 try:
75 i = args.index('-o')
76 global ofile
77 ofile = args[i+1]
78 except (ValueError, IndexError):
79 pass
80
81 compiler = sys.argv[0]
82
83 try:
84 proc = subprocess.Popen(args, stderr=subprocess.PIPE)
85 for line in proc.stderr:
86 print line,
87 interpret_warning(line)
88
89 result = proc.wait()
90 except OSError as e:
91 result = e.errno
92 if result == errno.ENOENT:
93 print args[0] + ':',e.strerror
94 print 'Is your PATH set correctly?'
95 else:
96 print ' '.join(args), str(e)
97
98 return result
99
100if __name__ == '__main__':
101 status = run_gcc()
102 sys.exit(status)