blob: 47b2630fd0e6dfa8523cdae9b3020e98cc816904 [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
Huang, Tao4c9b02f2015-11-23 20:56:39 +080045 "af_unix.c:911", # net/unix/af_unix.c:911:20: warning: 'hash' may be used uninitialized in this function
Huang, Tao7a51384d2015-11-21 19:40:34 +080046 "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
Huang, Tao3d3618d2015-11-24 20:43:54 +080050 "compat_binfmt_elf.c:58", # fs/compat_binfmt_elf.c:58:13: warning: 'cputime_to_compat_timeval' defined but not used
Huang, Taof1f22ee2015-12-01 10:01:14 +080051 "cgroup.c:2132", # kernel/cgroup.c:2132:13: warning: 'root' may be used uninitialized in this function
52 "mdp5.xml.h:1038", # drivers/gpu/drm/msm/mdp/mdp5/mdp5.xml.h:1038:16: warning: 'uv_filter' may be used uninitialized in this function
hwg6461fc62015-03-04 10:46:28 +080053 ])
54
55# Capture the name of the object file, can find it.
56ofile = None
57
58warning_re = re.compile(r'''(.*/|)([^/]+\.[a-z]+:\d+):(\d+:)? warning:''')
59def interpret_warning(line):
60 """Decode the message from gcc. The messages we care about have a filename, and a warning"""
61 line = line.rstrip('\n')
62 m = warning_re.match(line)
63 if m and m.group(2) not in allowed_warnings:
64 print "error, forbidden warning:", m.group(2)
65
66 # If there is a warning, remove any object if it exists.
67 if ofile:
68 try:
69 os.remove(ofile)
70 except OSError:
71 pass
72 sys.exit(1)
73
74def run_gcc():
75 args = sys.argv[1:]
76 # Look for -o
77 try:
78 i = args.index('-o')
79 global ofile
80 ofile = args[i+1]
81 except (ValueError, IndexError):
82 pass
83
84 compiler = sys.argv[0]
85
86 try:
87 proc = subprocess.Popen(args, stderr=subprocess.PIPE)
88 for line in proc.stderr:
89 print line,
90 interpret_warning(line)
91
92 result = proc.wait()
93 except OSError as e:
94 result = e.errno
95 if result == errno.ENOENT:
96 print args[0] + ':',e.strerror
97 print 'Is your PATH set correctly?'
98 else:
99 print ' '.join(args), str(e)
100
101 return result
102
103if __name__ == '__main__':
104 status = run_gcc()
105 sys.exit(status)