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Unified Diff: build/win/importlibs/create_importlib_win.py

Issue 2101243005: Add a snapshot of flutter/engine/src/build to our sdk (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: add README.dart Created 4 years, 6 months ago
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Index: build/win/importlibs/create_importlib_win.py
diff --git a/build/win/importlibs/create_importlib_win.py b/build/win/importlibs/create_importlib_win.py
new file mode 100755
index 0000000000000000000000000000000000000000..bb6a2f02636d8e40674fa3eca3eab82299758c5f
--- /dev/null
+++ b/build/win/importlibs/create_importlib_win.py
@@ -0,0 +1,217 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+"""Creates an import library from an import description file."""
+import ast
+import logging
+import optparse
+import os
+import os.path
+import shutil
+import subprocess
+import sys
+import tempfile
+
+
+_USAGE = """\
+Usage: %prog [options] [imports-file]
+
+Creates an import library from imports-file.
+
+Note: this script uses the microsoft assembler (ml.exe) and the library tool
+ (lib.exe), both of which must be in path.
+"""
+
+
+_ASM_STUB_HEADER = """\
+; This file is autogenerated by create_importlib_win.py, do not edit.
+.386
+.MODEL FLAT, C
+.CODE
+
+; Stubs to provide mangled names to lib.exe for the
+; correct generation of import libs.
+"""
+
+
+_DEF_STUB_HEADER = """\
+; This file is autogenerated by create_importlib_win.py, do not edit.
+
+; Export declarations for generating import libs.
+"""
+
+
+_LOGGER = logging.getLogger()
+
+
+
+class _Error(Exception):
+ pass
+
+
+class _ImportLibraryGenerator(object):
+ def __init__(self, temp_dir):
+ self._temp_dir = temp_dir
+
+ def _Shell(self, cmd, **kw):
+ ret = subprocess.call(cmd, **kw)
+ _LOGGER.info('Running "%s" returned %d.', cmd, ret)
+ if ret != 0:
+ raise _Error('Command "%s" returned %d.' % (cmd, ret))
+
+ def _ReadImportsFile(self, imports_file):
+ # Slurp the imports file.
+ return ast.literal_eval(open(imports_file).read())
+
+ def _WriteStubsFile(self, import_names, output_file):
+ output_file.write(_ASM_STUB_HEADER)
+
+ for name in import_names:
+ output_file.write('%s PROC\n' % name)
+ output_file.write('%s ENDP\n' % name)
+
+ output_file.write('END\n')
+
+ def _WriteDefFile(self, dll_name, import_names, output_file):
+ output_file.write(_DEF_STUB_HEADER)
+ output_file.write('NAME %s\n' % dll_name)
+ output_file.write('EXPORTS\n')
+ for name in import_names:
+ name = name.split('@')[0]
+ output_file.write(' %s\n' % name)
+
+ def _CreateObj(self, dll_name, imports):
+ """Writes an assembly file containing empty declarations.
+
+ For each imported function of the form:
+
+ AddClipboardFormatListener@4 PROC
+ AddClipboardFormatListener@4 ENDP
+
+ The resulting object file is then supplied to lib.exe with a .def file
+ declaring the corresponding non-adorned exports as they appear on the
+ exporting DLL, e.g.
+
+ EXPORTS
+ AddClipboardFormatListener
+
+ In combination, the .def file and the .obj file cause lib.exe to generate
+ an x86 import lib with public symbols named like
+ "__imp__AddClipboardFormatListener@4", binding to exports named like
+ "AddClipboardFormatListener".
+
+ All of this is perpetrated in a temporary directory, as the intermediate
+ artifacts are quick and easy to produce, and of no interest to anyone
+ after the fact."""
+
+ # Create an .asm file to provide stdcall-like stub names to lib.exe.
+ asm_name = dll_name + '.asm'
+ _LOGGER.info('Writing asm file "%s".', asm_name)
+ with open(os.path.join(self._temp_dir, asm_name), 'wb') as stubs_file:
+ self._WriteStubsFile(imports, stubs_file)
+
+ # Invoke on the assembler to compile it to .obj.
+ obj_name = dll_name + '.obj'
+ cmdline = ['ml.exe', '/nologo', '/c', asm_name, '/Fo', obj_name]
+ self._Shell(cmdline, cwd=self._temp_dir, stdout=open(os.devnull))
+
+ return obj_name
+
+ def _CreateImportLib(self, dll_name, imports, architecture, output_file):
+ """Creates an import lib binding imports to dll_name for architecture.
+
+ On success, writes the import library to output file.
+ """
+ obj_file = None
+
+ # For x86 architecture we have to provide an object file for correct
+ # name mangling between the import stubs and the exported functions.
+ if architecture == 'x86':
+ obj_file = self._CreateObj(dll_name, imports)
+
+ # Create the corresponding .def file. This file has the non stdcall-adorned
+ # names, as exported by the destination DLL.
+ def_name = dll_name + '.def'
+ _LOGGER.info('Writing def file "%s".', def_name)
+ with open(os.path.join(self._temp_dir, def_name), 'wb') as def_file:
+ self._WriteDefFile(dll_name, imports, def_file)
+
+ # Invoke on lib.exe to create the import library.
+ # We generate everything into the temporary directory, as the .exp export
+ # files will be generated at the same path as the import library, and we
+ # don't want those files potentially gunking the works.
+ dll_base_name, ext = os.path.splitext(dll_name)
+ lib_name = dll_base_name + '.lib'
+ cmdline = ['lib.exe',
+ '/machine:%s' % architecture,
+ '/def:%s' % def_name,
+ '/out:%s' % lib_name]
+ if obj_file:
+ cmdline.append(obj_file)
+
+ self._Shell(cmdline, cwd=self._temp_dir, stdout=open(os.devnull))
+
+ # Copy the .lib file to the output directory.
+ shutil.copyfile(os.path.join(self._temp_dir, lib_name), output_file)
+ _LOGGER.info('Created "%s".', output_file)
+
+ def CreateImportLib(self, imports_file, output_file):
+ # Read the imports file.
+ imports = self._ReadImportsFile(imports_file)
+
+ # Creates the requested import library in the output directory.
+ self._CreateImportLib(imports['dll_name'],
+ imports['imports'],
+ imports.get('architecture', 'x86'),
+ output_file)
+
+
+def main():
+ parser = optparse.OptionParser(usage=_USAGE)
+ parser.add_option('-o', '--output-file',
+ help='Specifies the output file path.')
+ parser.add_option('-k', '--keep-temp-dir',
+ action='store_true',
+ help='Keep the temporary directory.')
+ parser.add_option('-v', '--verbose',
+ action='store_true',
+ help='Verbose logging.')
+
+ options, args = parser.parse_args()
+
+ if len(args) != 1:
+ parser.error('You must provide an imports file.')
+
+ if not options.output_file:
+ parser.error('You must provide an output file.')
+
+ options.output_file = os.path.abspath(options.output_file)
+
+ if options.verbose:
+ logging.basicConfig(level=logging.INFO)
+ else:
+ logging.basicConfig(level=logging.WARN)
+
+
+ temp_dir = tempfile.mkdtemp()
+ _LOGGER.info('Created temporary directory "%s."', temp_dir)
+ try:
+ # Create a generator and create the import lib.
+ generator = _ImportLibraryGenerator(temp_dir)
+
+ ret = generator.CreateImportLib(args[0], options.output_file)
+ except Exception, e:
+ _LOGGER.exception('Failed to create import lib.')
+ ret = 1
+ finally:
+ if not options.keep_temp_dir:
+ shutil.rmtree(temp_dir)
+ _LOGGER.info('Deleted temporary directory "%s."', temp_dir)
+
+ return ret
+
+
+if __name__ == '__main__':
+ sys.exit(main())
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