1#! /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 33from __future__ import print_function 34import errno 35import re 36import os 37import sys 38import subprocess 39 40allowed_warnings = set([ 41 "cgroup.h:35", # include/trace/hooks/cgroup.h:35:18: warning: 'struct cgroup_subsys' declared inside parameter list will not be visible outside of this definition or declaration 42 "vfs.c:1259", # fs/incfs/vfs.c:1259:10: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 43 "pseudo_files.c:655", # fs/incfs/pseudo_files.c:655:10: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 44 "km_apphint.c:230", # drivers/staging/imgtec/rogue/km_apphint.c:230:48: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div] 45 "file.c:3010", # fs/f2fs/file.c:3010:12: warning: 'f2fs_ioctl_check_project' defined but not used 46 "configfs.c:1488", # drivers/usb/gadget/configfs.c:1488:12: warning: 'configfs_composite_setup' defined but not used 47 "configfs.c:1513", # drivers/usb/gadget/configfs.c:1513:13: warning: 'configfs_composite_disconnect' defined but not used 48 "posix-cpu-timers.c:1268", # kernel/time/posix-cpu-timers.c:1268:13: warning: 'now' may be used uninitialized in this function 49 "af_unix.c:1036", # net/unix/af_unix.c:1036:20: warning: 'hash' may be used uninitialized in this function 50 "sunxi_sram.c:214", # drivers/soc/sunxi/sunxi_sram.c:214:24: warning: 'device' may be used uninitialized in this function 51 "ks8851.c:298", # drivers/net/ethernet/micrel/ks8851.c:298:2: warning: 'rxb[0]' may be used uninitialized in this function 52 "ks8851.c:421", # drivers/net/ethernet/micrel/ks8851.c:421:20: warning: 'rxb[0]' may be used uninitialized in this function 53 "compat_binfmt_elf.c:58", # fs/compat_binfmt_elf.c:58:13: warning: 'cputime_to_compat_timeval' defined but not used 54 "memcontrol.c:5337", # mm/memcontrol.c:5337:12: warning: initialization from incompatible pointer type 55 "atags_to_fdt.c:101", # arch/arm/boot/compressed/atags_to_fdt.c:101:1: warning: the frame size of 2056 bytes is larger than 1280 bytes [-Wframe-larger-than=] 56 "drm_edid.c:3506", # drivers/gpu/drm/drm_edid.c:3506:13: warning: 'cea_db_is_hdmi_forum_vsdb' defined but not used 57 # W=1 58 "bounds.c:15", # kernel/bounds.c:15:6: warning: no previous prototype for ‘foo’ 59 "cpufeature.h:157", # arch/arm64/include/asm/cpufeature.h:157:68: warning: signed and unsigned type in conditional expression 60 "sched.h:1211", # include/linux/sched.h:1211:1: warning: type qualifiers ignored on function return type 61 "halphyrf_8188e_ce.c:2208", # drivers/net/wireless/rockchip_wlan/rtl8189es/hal/phydm/rtl8188e/halphyrf_8188e_ce.c:2208:1: warning: the frame size of 1056 bytes is larger than 1024 bytes 62 "halphyrf_8723b_ce.c:2879", # drivers/net/wireless/rockchip_wlan/rtl8723bu/hal/phydm/rtl8723b/halphyrf_8723b_ce.c:2879:1: warning: the frame size of 1056 bytes is larger than 1024 bytes 63 ]) 64 65# Capture the name of the object file, can find it. 66ofile = None 67 68do_exit = False; 69 70warning_re = re.compile(r'''(.*/|)([^/]+\.[a-z]+:\d+):(\d+:)? warning:''') 71def interpret_warning(line): 72 """Decode the message from gcc. The messages we care about have a filename, and a warning""" 73 line = line.rstrip('\n') 74 m = warning_re.match(line) 75 if m and m.group(2) not in allowed_warnings: 76 print ("error, forbidden warning:" + m.group(2)) 77 78 # If there is a warning, remove any object if it exists. 79 if ofile: 80 try: 81 os.remove(ofile) 82 except OSError: 83 pass 84 global do_exit 85 do_exit = True; 86 87def run_gcc(): 88 args = sys.argv[1:] 89 # Look for -o 90 try: 91 i = args.index('-o') 92 global ofile 93 ofile = args[i+1] 94 except (ValueError, IndexError): 95 pass 96 97 compiler = sys.argv[0] 98 99 try: 100 env = os.environ.copy() 101 env['LC_ALL'] = 'C' 102 proc = subprocess.Popen(args, stderr=subprocess.PIPE, env=env) 103 for line in proc.stderr: 104 print (line.decode("utf-8"), end="") 105 interpret_warning(line.decode("utf-8")) 106 if do_exit: 107 sys.exit(1) 108 109 result = proc.wait() 110 except OSError as e: 111 result = e.errno 112 if result == errno.ENOENT: 113 print (args[0] + ':' + e.strerror) 114 print ('Is your PATH set correctly?') 115 else: 116 print (' '.join(args) + str(e)) 117 118 return result 119 120if __name__ == '__main__': 121 status = run_gcc() 122 sys.exit(status) 123