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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
Shunqian Zheng41c170c2018-07-18 11:10:26 +080033from __future__ import print_function
hwg6461fc62015-03-04 10:46:28 +080034import errno
35import re
36import os
37import sys
38import subprocess
39
40# Note that gcc uses unicode, which may depend on the locale. TODO:
41# force LANG to be set to en_US.UTF-8 to get consistent warnings.
42
43allowed_warnings = set([
Huang, Tao7a51384d2015-11-21 19:40:34 +080044 "posix-cpu-timers.c:1268", # kernel/time/posix-cpu-timers.c:1268:13: warning: 'now' may be used uninitialized in this function
Huang, Tao1af25682016-01-11 11:49:11 +080045 "af_unix.c:1036", # net/unix/af_unix.c:1036:20: 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
Huang, Tao3d3618d2015-11-24 20:43:54 +080049 "compat_binfmt_elf.c:58", # fs/compat_binfmt_elf.c:58:13: warning: 'cputime_to_compat_timeval' defined but not used
Huang, Tao8c7f8df2017-03-31 15:15:45 +080050 "memcontrol.c:5337", # mm/memcontrol.c:5337:12: warning: initialization from incompatible pointer type
Huang, Taobce18392017-06-05 15:27:23 +080051 "atags_to_fdt.c:98", # arch/arm/boot/compressed/atags_to_fdt.c:98:1: warning: the frame size of 1032 bytes is larger than 1024 bytes
Jianqun Xucb39b5b2017-06-27 17:00:35 +080052 "drm_edid.c:3506", # drivers/gpu/drm/drm_edid.c:3506:13: warning: 'cea_db_is_hdmi_forum_vsdb' defined but not used
Tao Huang1079fa92018-03-28 18:48:44 +080053 # W=1
54 "bounds.c:15", # kernel/bounds.c:15:6: warning: no previous prototype for ‘foo’
55 "cpufeature.h:157", # arch/arm64/include/asm/cpufeature.h:157:68: warning: signed and unsigned type in conditional expression
56 "sched.h:1211", # include/linux/sched.h:1211:1: warning: type qualifiers ignored on function return type
hwg6461fc62015-03-04 10:46:28 +080057 ])
58
59# Capture the name of the object file, can find it.
60ofile = None
61
Shunqian Zheng41c170c2018-07-18 11:10:26 +080062do_exit = False;
63
hwg6461fc62015-03-04 10:46:28 +080064warning_re = re.compile(r'''(.*/|)([^/]+\.[a-z]+:\d+):(\d+:)? warning:''')
65def interpret_warning(line):
66 """Decode the message from gcc. The messages we care about have a filename, and a warning"""
67 line = line.rstrip('\n')
68 m = warning_re.match(line)
69 if m and m.group(2) not in allowed_warnings:
Shunqian Zheng41c170c2018-07-18 11:10:26 +080070 print ("error, forbidden warning:" + m.group(2))
hwg6461fc62015-03-04 10:46:28 +080071
72 # If there is a warning, remove any object if it exists.
73 if ofile:
74 try:
75 os.remove(ofile)
76 except OSError:
77 pass
Shunqian Zheng41c170c2018-07-18 11:10:26 +080078 global do_exit
79 do_exit = True;
hwg6461fc62015-03-04 10:46:28 +080080
81def run_gcc():
82 args = sys.argv[1:]
83 # Look for -o
84 try:
85 i = args.index('-o')
86 global ofile
87 ofile = args[i+1]
88 except (ValueError, IndexError):
89 pass
90
91 compiler = sys.argv[0]
92
93 try:
94 proc = subprocess.Popen(args, stderr=subprocess.PIPE)
95 for line in proc.stderr:
Shunqian Zheng41c170c2018-07-18 11:10:26 +080096 print (line.decode("utf-8"), end="")
97 interpret_warning(line.decode("utf-8"))
98 if do_exit:
99 sys.exit(1)
hwg6461fc62015-03-04 10:46:28 +0800100
101 result = proc.wait()
102 except OSError as e:
103 result = e.errno
104 if result == errno.ENOENT:
Shunqian Zheng41c170c2018-07-18 11:10:26 +0800105 print (args[0] + ':' + e.strerror)
106 print ('Is your PATH set correctly?')
hwg6461fc62015-03-04 10:46:28 +0800107 else:
Shunqian Zheng41c170c2018-07-18 11:10:26 +0800108 print (' '.join(args) + str(e))
hwg6461fc62015-03-04 10:46:28 +0800109
110 return result
111
112if __name__ == '__main__':
113 status = run_gcc()
114 sys.exit(status)