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A script to validate exports/imports of mgwhelp symbols are expected.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,325 @@ | ||
| #!/usr/bin/env python3 | ||
| # | ||
| # Copyright (c) 2023 Jose Fonseca | ||
| # | ||
| # SPDX-License-Identifier: LGPL-2.1-or-later | ||
| # | ||
|
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| import argparse | ||
| import json | ||
| import os | ||
| import glob | ||
| import re | ||
| import subprocess | ||
| import sys | ||
|
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|
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| dbghelp_exports = { | ||
|
|
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| "SymInitialize", | ||
| "SymInitializeW", | ||
| "SymCleanup", | ||
| "SymSetOptions", | ||
| "SymFromAddr", | ||
| "SymFromAddrW", | ||
| "SymGetLineFromAddr64", | ||
| "SymGetLineFromAddrW64", | ||
| "SymLoadModuleEx", | ||
| "SymLoadModuleExW", | ||
| "UnDecorateSymbolName", | ||
|
|
||
| "EnumDirTree", | ||
| "EnumDirTreeW", | ||
| "EnumerateLoadedModules", | ||
| "EnumerateLoadedModules64", | ||
| "EnumerateLoadedModulesW64", | ||
| "ExtensionApiVersion", | ||
| "FindDebugInfoFile", | ||
| "FindDebugInfoFileEx", | ||
| "FindExecutableImage", | ||
| "FindExecutableImageEx", | ||
| "FindExecutableImageExW", | ||
| "GetTimestampForLoadedLibrary", | ||
| "ImageDirectoryEntryToData", | ||
| "ImageDirectoryEntryToDataEx", | ||
| "ImageNtHeader", | ||
| "ImageRvaToSection", | ||
| "ImageRvaToVa", | ||
| "ImagehlpApiVersion", | ||
| "ImagehlpApiVersionEx", | ||
| "MakeSureDirectoryPathExists", | ||
| "MiniDumpReadDumpStream", | ||
| "MiniDumpWriteDump", | ||
| "SearchTreeForFile", | ||
| "SearchTreeForFileW", | ||
| "StackWalk", | ||
| "StackWalk64", | ||
| "SymAddSymbol", | ||
| "SymAddSymbolW", | ||
| "SymEnumLines", | ||
| "SymEnumSourceFiles", | ||
| "SymEnumSymbols", | ||
| "SymEnumSymbolsW", | ||
| "SymEnumTypes", | ||
| "SymEnumTypesW", | ||
| "SymEnumerateModules", | ||
| "SymEnumerateModules64", | ||
| "SymEnumerateModulesW64", | ||
| "SymEnumerateSymbols", | ||
| "SymEnumerateSymbols64", | ||
| "SymFindFileInPath", | ||
| "SymFindFileInPathW", | ||
| "SymFromName", | ||
| "SymFunctionTableAccess", | ||
| "SymFunctionTableAccess64", | ||
| "SymGetLineFromAddr", | ||
| "SymGetLineNext", | ||
| "SymGetLineNext64", | ||
| "SymGetLinePrev", | ||
| "SymGetLinePrev64", | ||
| "SymGetModuleBase", | ||
| "SymGetModuleBase64", | ||
| "SymGetModuleInfo", | ||
| "SymGetModuleInfo64", | ||
| "SymGetModuleInfoW", | ||
| "SymGetModuleInfoW64", | ||
| "SymGetOptions", | ||
| "SymGetSearchPath", | ||
| "SymGetSearchPathW", | ||
| "SymGetSourceFileToken", | ||
| "SymGetSourceFileTokenW", | ||
| "SymGetSymFromAddr", | ||
| "SymGetSymFromAddr64", | ||
| "SymGetSymFromName", | ||
| "SymGetSymFromName64", | ||
| "SymGetSymNext", | ||
| "SymGetSymNext64", | ||
| "SymGetSymPrev", | ||
| "SymGetSymPrev64", | ||
| "SymGetTypeFromName", | ||
| "SymGetTypeInfo", | ||
| "SymLoadModule", | ||
| "SymLoadModule64", | ||
| "SymMatchFileName", | ||
| "SymMatchFileNameW", | ||
| "SymMatchString", | ||
| "SymRefreshModuleList", | ||
| "SymRegisterCallback", | ||
| "SymRegisterCallback64", | ||
| "SymRegisterCallbackW64", | ||
| "SymRegisterFunctionEntryCallback", | ||
| "SymRegisterFunctionEntryCallback64", | ||
| "SymSearch", | ||
| "SymSearchW", | ||
| "SymSetContext", | ||
| "SymSetParentWindow", | ||
| "SymSetScopeFromAddr", | ||
| "SymSetSearchPath", | ||
| "SymSetSearchPathW", | ||
| "SymUnDName", | ||
| "SymUnDName64", | ||
| "SymUnloadModule", | ||
| "SymUnloadModule64", | ||
| "WinDbgExtensionDllInit", | ||
|
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| # TODO | ||
| #"MapDebugInformation", | ||
| #"UnmapDebugInformation", | ||
| } | ||
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| class ObjParser: | ||
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| def __init__(self, objdump, filename): | ||
| self.filename = filename | ||
| self.p = subprocess.Popen([objdump, '-p', filename], stdout=subprocess.PIPE, text=True) | ||
| self.lookahead = self._readline() | ||
| self.eof = False | ||
| self.imports = {} | ||
| self.exports = [] | ||
| self.valid = True | ||
|
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| def _readline(self): | ||
| line = self.p.stdout.readline() | ||
| if not line: | ||
| self.eof = True | ||
| return line.rstrip('\r\n') | ||
|
|
||
| def consume(self, value=None): | ||
| if value is not None: | ||
| assert self.lookahead == value | ||
| line = self.lookahead | ||
| self.lookahead = self._readline() | ||
| return line | ||
|
|
||
| def parse(self): | ||
| while not self.eof: | ||
| line = self.consume() | ||
| if line.startswith('The Import Tables:'): | ||
| self.parse_imports() | ||
| if line.startswith('Export Address Table'): | ||
| self.parse_exports_binutils() | ||
| if line.startswith('Export Table'): | ||
| self.parse_exports_llvm() | ||
| self.p.wait() | ||
| return self.p.returncode == 0 | ||
|
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||
| dll_name_re = re.compile(r'\s+DLL Name: (?P<name>.*)$') | ||
| import_symbol_re = re.compile(r'\s+(?P<vma>[0-9a-f]+\s+)?(?P<ord>[0-9]+)\s+(?P<name>\S+)$') | ||
|
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| def parse_imports(self): | ||
| while not self.eof: | ||
| line = self.lookahead | ||
| if line and not line[0].isspace(): | ||
| break | ||
| line = self.consume(line) | ||
|
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| mo = self.dll_name_re.match(line) | ||
| if mo: | ||
| dll_name = mo.group('name') | ||
| self.parse_imports_dll(dll_name) | ||
|
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| def parse_imports_dll(self, dll_name): | ||
| symbols = [] | ||
| while self.lookahead: | ||
| line = self.consume() | ||
| mo = self.import_symbol_re.match(line) | ||
| if mo: | ||
| symbols.append(mo.group('name')) | ||
| self.imports[dll_name.lower()] = symbols | ||
|
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| export_symbol_llvm_re = re.compile(r'\s+(?P<ord>[0-9]+)\s+(?P<rva>0x[0-9a-f]+)\s+(?P<name>\S+)$') | ||
| export_symbol_llvm_fw_re = re.compile(r'\s+(?P<ord>[0-9]+)\s+(?P<name>\S+) \(forwarded to (?P<alias>\S+)\)$') | ||
|
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| def parse_exports_llvm(self): | ||
| symbols = [] | ||
| while self.lookahead: | ||
| line = self.consume() | ||
| mo = self.export_symbol_llvm_re.match(line) | ||
| if mo: | ||
| symbol = mo.group('name') | ||
| symbols.append(symbol) | ||
| continue | ||
| mo = self.export_symbol_llvm_fw_re.match(line) | ||
| if mo: | ||
| symbol = mo.group('name') + '=' + mo.group('alias') | ||
| symbols.append(symbol) | ||
| continue | ||
| self.exports = symbols | ||
|
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| export_address_binutils_re = re.compile(r'^\s+\[\s*(?P<idx>[0-9]+)\] \+base\[\s*(?P<ord>[0-9]+)\]\s+[0-9a-f]+\s+(?:Forwarder RVA -- (?P<alias>\S+)|Export RVA)$') | ||
|
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| export_name_binutils_re = re.compile(r'^\s+\[\s*(?P<idx>[0-9]+)\] (?P<name>\S+)$') | ||
| def parse_exports_binutils(self): | ||
|
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| addresses = {} | ||
| while self.lookahead: | ||
| line = self.consume() | ||
| mo = self.export_address_binutils_re.match(line) | ||
| if mo: | ||
| alias = mo.group('alias') | ||
| if alias is not None: | ||
| addresses[mo.group('idx')] = alias | ||
|
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| self.consume('') | ||
|
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| self.consume('[Ordinal/Name Pointer] Table') | ||
| symbols = [] | ||
| while self.lookahead: | ||
| line = self.consume() | ||
| mo = self.export_name_binutils_re.match(line) | ||
| assert mo | ||
|
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| name = mo.group('name') | ||
| try: | ||
| alias = addresses[mo.group('idx')] | ||
| except KeyError: | ||
| pass | ||
| else: | ||
| name += '=' + alias | ||
|
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| symbols.append(name) | ||
|
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| self.exports = symbols | ||
|
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| def validate(self): | ||
| name = os.path.basename(self.filename).lower() | ||
| if name == 'mgwhelp.dll': | ||
| self.validate_mgwhelp_exports() | ||
| else: | ||
| self.validate_mgwhelp_imports() | ||
| if 'libwinpthread-1.dll' in self.imports: | ||
| self.error('imports libwinpthread-1.dll') | ||
| sys.stderr.write(f'info: {self.filename}: {"OK" if self.valid else "NOT OK"}\n') | ||
|
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| def validate_mgwhelp_exports(self): | ||
| for symbol in self.exports: | ||
| if '@' in symbol: | ||
| self.error(f'exports mangled {symbol}') | ||
| exports = set([symbol.split('=')[0] for symbol in self.exports]) | ||
| for symbol in dbghelp_exports - exports: | ||
| self.error(f'export {symbol} missing') | ||
| for symbol in exports - dbghelp_exports: | ||
| if symbol.startswith('dwarf_'): | ||
| continue | ||
| if symbol in ("MapDebugInformation", "UnmapDebugInformation"): | ||
| # XXX Eliminate this discrepancy between exports | ||
| continue | ||
| self.error(f'spurious export {symbol}') | ||
|
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| def validate_mgwhelp_imports(self): | ||
| for symbol in self.imports.get('mgwhelp.dll', []): | ||
| if '@' in symbol: | ||
| self.error(f'imports mangled {symbol}') | ||
| if 'dbghelp.dll' in self.imports: | ||
| self.error('imports dbghelp.dll instead of mgwhelp.dll') | ||
|
|
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| def error(self, msg): | ||
| sys.stderr.write(f'error: {self.filename}: {msg}\n') | ||
| self.valid = False | ||
|
|
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| def warning(self, msg): | ||
| sys.stderr.write(f'warning: {self.filename}: {msg}\n') | ||
|
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|
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| def main(): | ||
| argparser = argparse.ArgumentParser() | ||
| argparser.add_argument('--objdump', default='llvm-objdump') | ||
| argparser.add_argument('--validate', action='store_true') | ||
| argparser.add_argument('filename', nargs='+') | ||
| args = argparser.parse_args() | ||
|
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| filenames = args.filename | ||
|
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| if sys.platform == 'win32': | ||
| filenames = [] | ||
| for pattern in args.filename: | ||
| filenames += glob.glob(pattern) | ||
| else: | ||
| filenames = args.filename | ||
|
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| status = 0 | ||
| for filename in filenames: | ||
| objparser = ObjParser(args.objdump, filename) | ||
| if objparser.parse(): | ||
| if args.validate: | ||
| objparser.validate() | ||
| if not objparser.valid: | ||
| status = 1 | ||
| else: | ||
| # Dump as JSON | ||
| state = { | ||
| 'imports': objparser.imports, | ||
| 'exports': objparser.exports, | ||
| } | ||
| json.dump(state, sys.stdout, sort_keys=False, indent=2) | ||
| sys.stdout.write('\n') | ||
| else: | ||
| status = 1 | ||
|
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| sys.exit(status) | ||
|
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|
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| if __name__ =='__main__': | ||
| main() |