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Unified Diff: build/win/importlibs/filter_export_list.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/filter_export_list.py
diff --git a/build/win/importlibs/filter_export_list.py b/build/win/importlibs/filter_export_list.py
new file mode 100755
index 0000000000000000000000000000000000000000..c2489a9da7c34f7e855f1cb98652c148f4e0b849
--- /dev/null
+++ b/build/win/importlibs/filter_export_list.py
@@ -0,0 +1,85 @@
+#!/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.
+#
+"""Help maintaining DLL import lists."""
+import ast
+import optparse
+import re
+import sys
+
+
+_EXPORT_RE = re.compile(r"""
+ ^\s*(?P<ordinal>[0-9]+) # The ordinal field.
+ \s+(?P<hint>[0-9A-F]+) # The hint field.
+ \s(?P<rva>........) # The RVA field.
+ \s+(?P<name>[^ ]+) # And finally the name we're really after.
+""", re.VERBOSE)
+
+
+_USAGE = r"""\
+Usage: %prog [options] [master-file]
+
+This script filters a list of exports from a DLL, generated from something
+like the following command line:
+
+C:\> dumpbin /exports user32.dll
+
+against a master list of imports built from e.g.
+
+C:\> dumpbin /exports user32.lib
+
+The point of this is to trim non-public exports from the list, and to
+normalize the names to their stdcall-mangled form for the generation of
+import libraries.
+Note that the export names from the latter incanatation are stdcall-mangled,
+e.g. they are suffixed with "@" and the number of argument bytes to the
+function.
+"""
+
+def _ReadMasterFile(master_file):
+ # Slurp the master file.
+ with open(master_file) as f:
+ master_exports = ast.literal_eval(f.read())
+
+ master_mapping = {}
+ for export in master_exports:
+ name = export.split('@')[0]
+ master_mapping[name] = export
+
+ return master_mapping
+
+
+def main():
+ parser = optparse.OptionParser(usage=_USAGE)
+ parser.add_option('-r', '--reverse',
+ action='store_true',
+ help='Reverse the matching, e.g. return the functions '
+ 'in the master list that aren\'t in the input.')
+
+ options, args = parser.parse_args()
+ if len(args) != 1:
+ parser.error('Must provide a master file.')
+
+ master_mapping = _ReadMasterFile(args[0])
+
+ found_exports = []
+ for line in sys.stdin:
+ match = _EXPORT_RE.match(line)
+ if match:
+ export_name = master_mapping.get(match.group('name'), None)
+ if export_name:
+ found_exports.append(export_name)
+
+ if options.reverse:
+ # Invert the found_exports list.
+ found_exports = set(master_mapping.values()) - set(found_exports)
+
+ # Sort the found exports for tidy output.
+ print '\n'.join(sorted(found_exports))
+ return 0
+
+
+if __name__ == '__main__':
+ sys.exit(main())
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