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#!/usr/bin/env python2
"""Verify that a ChromeOS sub-tree was built with a particular compiler"""
from __future__ import print_function
import argparse
import fnmatch
import os
import sys
from cros_utils import command_executer
COMPILERS = ['gcc', 'clang']
COMPILER_STRINGS = {'gcc': 'GNU C', 'clang': 'clang version'}
ERR_NO_DEBUG_INFO = 1024
def UsageError(parser, message):
"""Output error message and help/usage info."""
print('ERROR: %s' % message)
parser.print_help()
sys.exit(0)
def CreateTmpDwarfFile(filename, dwarf_file, cmd_executer):
"""Create temporary dwarfdump file, to be parsed later."""
cmd = ('readelf --debug-dump=info %s | grep -A5 DW_AT_producer > %s' %
(filename, dwarf_file))
retval = cmd_executer.RunCommand(cmd, print_to_console=False)
return retval
def FindAllFiles(root_dir):
"""Create a list of all the *.debug and *.dwp files to be checked."""
file_list = []
tmp_list = [
os.path.join(dirpath, f)
for dirpath, _, files in os.walk(root_dir)
for f in fnmatch.filter(files, '*.debug')
]
for f in tmp_list:
if 'build-id' not in f:
file_list.append(f)
tmp_list = [
os.path.join(dirpath, f)
for dirpath, _, files in os.walk(root_dir)
for f in fnmatch.filter(files, '*.dwp')
]
file_list += tmp_list
return file_list
def VerifyArgs(compiler, filename, tmp_dir, root_dir, options, parser):
"""Verify that the option values and combinations are valid."""
if options.filename and options.all_files:
UsageError(parser, 'Cannot use both --file and --all_files.')
if options.filename and options.root_dir:
UsageError(parser, 'Cannot use both --file and --root_dir.')
if options.all_files and not options.root_dir:
UsageError(parser, 'Missing --root_dir option.')
if options.root_dir and not options.all_files:
UsageError(parser, 'Missing --all_files option.')
if not options.filename and not options.all_files:
UsageError(parser, 'Must specify either --file or --all_files.')
# Verify that the values specified are valid.
if filename:
if not os.path.exists(filename):
UsageError(parser, 'Cannot find %s' % filename)
compiler = options.compiler.lower()
if compiler not in COMPILERS:
UsageError(parser, '%s is not a valid compiler (gcc or clang).' % compiler)
if root_dir and not os.path.exists(root_dir):
UsageError(parser, '%s does not exist.' % root_dir)
if not os.path.exists(tmp_dir):
os.makedirs(tmp_dir)
def CheckFile(filename, compiler, tmp_dir, options, cmd_executer):
"""Verify the information in a single file."""
print('Checking %s' % filename)
# Verify that file contains debug information.
cmd = 'readelf -SW %s | grep debug_info' % filename
retval = cmd_executer.RunCommand(cmd, print_to_console=False)
if retval != 0:
print('No debug info in this file. Unable to verify compiler.')
# There's no debug info in this file, so skip it.
return ERR_NO_DEBUG_INFO
tmp_name = os.path.basename(filename) + '.dwarf'
dwarf_file = os.path.join(tmp_dir, tmp_name)
status = CreateTmpDwarfFile(filename, dwarf_file, cmd_executer)
if status != 0:
print('Unable to create dwarf file for %s (status: %d).' % (filename,
status))
return status
comp_str = COMPILER_STRINGS[compiler]
retval = 0
with open(dwarf_file, 'r') as in_file:
lines = in_file.readlines()
looking_for_name = False
for line in lines:
if 'DW_AT_producer' in line:
looking_for_name = False
if 'GNU AS' in line:
continue
if comp_str not in line:
looking_for_name = True
retval = 1
elif looking_for_name:
if 'DW_AT_name' in line:
words = line.split(':')
bad_file = words[-1]
print('FAIL: %s was not compiled with %s.' % (bad_file.rstrip(),
compiler))
looking_for_name = False
elif 'DW_TAG_' in line:
looking_for_name = False
if not options.keep_file:
os.remove(dwarf_file)
return retval
def Main(argv):
cmd_executer = command_executer.GetCommandExecuter()
parser = argparse.ArgumentParser()
parser.add_argument(
'--file', dest='filename', help='Name of file to be verified.')
parser.add_argument(
'--compiler',
dest='compiler',
required=True,
help='Desired compiler (gcc or clang)')
parser.add_argument(
'--tmp_dir',
dest='tmp_dir',
help='Directory in which to put dwarf dump file.'
' Defaults to /tmp')
parser.add_argument(
'--keep_file',
dest='keep_file',
default=False,
action='store_true',
help='Do not delete dwarf file when done.')
parser.add_argument(
'--all_files',
dest='all_files',
default=False,
action='store_true',
help='Find and check ALL .debug/.dwp files '
'in subtree. Must be used with --root_dir '
'(and NOT with --file).')
parser.add_argument(
'--root_dir',
dest='root_dir',
help='Root of subtree in which to look for '
'files. Must be used with --all_files, and'
' not with --file.')
options = parser.parse_args(argv)
compiler = options.compiler
filename = None
if options.filename:
filename = os.path.realpath(os.path.expanduser(options.filename))
tmp_dir = '/tmp'
if options.tmp_dir:
tmp_dir = os.path.realpath(os.path.expanduser(options.tmp_dir))
root_dir = None
if options.root_dir:
root_dir = os.path.realpath(os.path.expanduser(options.root_dir))
VerifyArgs(compiler, filename, tmp_dir, root_dir, options, parser)
file_list = []
if filename:
file_list.append(filename)
else:
file_list = FindAllFiles(root_dir)
bad_files = []
unknown_files = []
all_pass = True
for f in file_list:
result = CheckFile(f, compiler, tmp_dir, options, cmd_executer)
if result == ERR_NO_DEBUG_INFO:
unknown_files.append(f)
all_pass = False
elif result != 0:
bad_files.append(f)
all_pass = False
if all_pass:
print('\n\nSUCCESS: All compilation units were compiled with %s.\n' %
compiler)
return 0
else:
if len(bad_files) == 0:
print(
'\n\n*Mostly* SUCCESS: All files that could be checked were compiled '
'with %s.' % compiler)
print(
'\n\nUnable to verify the following files (no debug info in them):\n')
for f in unknown_files:
print(f)
else:
print('\n\nFAILED: The following files were not compiled with %s:\n' %
compiler)
for f in bad_files:
print(f)
if len(unknown_files) > 0:
print('\n\nUnable to verify the following files (no debug info in '
'them):\n')
for f in unknown_files:
print(f)
return 1
if __name__ == '__main__':
sys.exit(Main(sys.argv[1:]))
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