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c1b305244a
BUG=chromium:690734 > Review-Url: https://codereview.chromium.org/2685233002 > Cr-Commit-Position: refs/heads/master@{#449550} > Message-Id: Merged from chromium 53f2146935506b4f382705b605dffec41b5519eb Change-Id: I1b3176a4a62078f1e27184ad589c9c3f4b548674 Reviewed-on: https://chromium-review.googlesource.com/440847 Reviewed-by: Mark Mentovai <mark@chromium.org>
140 lines
4.6 KiB
Python
Executable File
140 lines
4.6 KiB
Python
Executable File
#!/usr/bin/env python
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# coding: utf-8
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# Copyright 2014 The Crashpad Authors. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import os
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import re
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import subprocess
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import sys
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def FixUserImplementation(implementation):
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"""Rewrites a MIG-generated user implementation (.c) file.
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Rewrites the file at |implementation| by adding “__attribute__((unused))” to
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the definition of any structure typedefed as “__Reply” by searching for the
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pattern unique to those structure definitions. These structures are in fact
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unused in the user implementation file, and this will trigger a
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-Wunused-local-typedefs warning in gcc unless removed or marked with the
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“unused” attribute.
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"""
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file = open(implementation, 'r+')
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contents = file.read()
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pattern = re.compile('^(\t} __Reply);$', re.MULTILINE)
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contents = pattern.sub(r'\1 __attribute__((unused));', contents)
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file.seek(0)
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file.truncate()
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file.write(contents)
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file.close()
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def FixServerImplementation(implementation):
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"""Rewrites a MIG-generated server implementation (.c) file.
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Rewrites the file at |implementation| by replacing “mig_internal” with
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“mig_external” on functions that begin with “__MIG_check__”. This makes these
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functions available to other callers outside this file from a linkage
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perspective. It then returns, as a list of lines, declarations that can be
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added to a header file, so that other files that include that header file will
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have access to these declarations from a compilation perspective.
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"""
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file = open(implementation, 'r+')
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contents = file.read()
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# Find interesting declarations.
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declaration_pattern = \
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re.compile('^mig_internal (kern_return_t __MIG_check__.*)$',
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re.MULTILINE)
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declarations = declaration_pattern.findall(contents)
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# Remove “__attribute__((__unused__))” from the declarations, and call them
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# “mig_external” or “extern” depending on whether “mig_external” is defined.
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attribute_pattern = re.compile(r'__attribute__\(\(__unused__\)\) ')
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declarations = ['#ifdef mig_external\nmig_external\n#else\nextern\n#endif\n' +
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attribute_pattern.sub('', x) +
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';\n' for x in declarations]
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# Rewrite the declarations in this file as “mig_external”.
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contents = declaration_pattern.sub(r'mig_external \1', contents);
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file.seek(0)
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file.truncate()
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file.write(contents)
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file.close()
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return declarations
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def FixHeader(header, declarations=[]):
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"""Rewrites a MIG-generated header (.h) file.
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Rewrites the file at |header| by placing it inside an “extern "C"” block, so
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that it declares things properly when included by a C++ compilation unit.
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|declarations| can be a list of additional declarations to place inside the
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“extern "C"” block after the original contents of |header|.
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"""
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file = open(header, 'r+')
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contents = file.read()
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declarations_text = ''.join(declarations)
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contents = '''\
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#ifdef __cplusplus
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extern "C" {
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#endif
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%s
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%s
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#ifdef __cplusplus
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}
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#endif
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''' % (contents, declarations_text)
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file.seek(0)
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file.truncate()
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file.write(contents)
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file.close()
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def main(args):
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parser = argparse.ArgumentParser()
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parser.add_argument('--developer-dir', help='Path to Xcode')
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parser.add_argument('--sdk', help='Path to SDK')
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parser.add_argument('defs')
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parser.add_argument('user_c')
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parser.add_argument('server_c')
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parser.add_argument('user_h')
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parser.add_argument('server_h')
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parsed = parser.parse_args(args)
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command = ['mig',
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'-user', parsed.user_c,
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'-server', parsed.server_c,
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'-header', parsed.user_h,
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'-sheader', parsed.server_h,
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]
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if parsed.sdk is not None:
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command.extend(['-isysroot', parsed.sdk])
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if parsed.developer_dir is not None:
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os.environ['DEVELOPER_DIR'] = parsed.developer_dir
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command.append(parsed.defs)
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subprocess.check_call(command)
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FixUserImplementation(parsed.user_c)
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server_declarations = FixServerImplementation(parsed.server_c)
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FixHeader(parsed.user_h)
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FixHeader(parsed.server_h, server_declarations)
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if __name__ == '__main__':
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sys.exit(main(sys.argv[1:]))
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