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GenForwarders.py
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GenForwarders.py
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import glob
import os
import subprocess
import sys
import uuid
if len(sys.argv) != 3:
print("Usage: GenForwarders.py <vs_folder> <vc_version_to_generate>")
print("Last version generated 14.21.27702")
exit()
VSFolder = sys.argv[1]
VCVersion = sys.argv[2]
archs = ["x86", "x64", "arm64"]
archProjectMap = {
"arm64": "ARM64",
"x86": "Win32",
"x64": "x64"
};
importLibMapping = {
"concrt140" : "concrt.lib",
"concrt140d" : "concrtd.lib",
"msvcp140_1" : "msvcprt.lib",
"msvcp140_1d" : "msvcprtd.lib",
"msvcp140_2" : "msvcprt.lib",
"msvcp140_2d" : "msvcprtd.lib",
"msvcp140_atomic_wait" : "msvcprt.lib",
"msvcp140d_atomic_wait" : "msvcprtd.lib",
"msvcp140" : "msvcprt.lib",
"msvcp140d" : "msvcprtd.lib",
"vcamp140" : "vcamp.lib",
"vcamp140d" : "vcampd.lib",
"vccorlib140" : "vccorlib.lib",
"vccorlib140d" : "vccorlibd.lib",
"vcomp140" : "vcomp.lib",
"vcomp140d" : "vcompd.lib",
"vcruntime140" : "vcruntime.lib",
"vcruntime140d" : "vcruntimed.lib",
"vcruntime140_1" : "vcruntime.lib",
"vcruntime140_1d" : "vcruntimed.lib",
"msvcp140_codecvt_ids" : None,
"msvcp140d_codecvt_ids" : None,
};
# Some versions of MSVC ship with the libraries and tools in different
# directories. Since this tool takes *library* versions, this map will
# be used to map those to tool versions.
libraryToolsVersionMapping = {
"14.34.31931": "14.34.31933"
};
def GetToolsVersion(libVersion):
return libraryToolsVersionMapping[libVersion] if libVersion in libraryToolsVersionMapping else libVersion
def GetModules(arch):
modules = []
releaseFolder = os.path.join(VSFolder, r"VC\Redist\MSVC", VCVersion, arch)
releaseModules = glob.glob(os.path.join(releaseFolder, r"**\*.dll"), recursive=True)
modules += [[module, True] for module in releaseModules]
debugFolder = os.path.join(VSFolder, r"VC\Redist\MSVC", VCVersion, r"debug_nonredist", arch)
debugModules = glob.glob(os.path.join(debugFolder, r"**\*.dll"), recursive=True)
modules += [[module, False] for module in debugModules]
# The LLVM modules do not ship _app versions, and we must skip them.
modules = [tpl for tpl in modules if ("LLVM" not in tpl[0])]
return modules
def GetImportLibFolder(arch):
return os.path.join(VSFolder, r"VC\Tools\MSVC", GetToolsVersion(VCVersion), "lib", arch)
def GetDumpbin():
return os.path.join(VSFolder, r"VC\Tools\MSVC", GetToolsVersion(VCVersion), r"bin\Hostx86\x86\dumpbin.exe")
def GenerateSymbolMapping(importLibPath):
symbolTable = {}
output = subprocess.Popen([GetDumpbin(), "/headers", importLibPath], stdout=subprocess.PIPE)
for line in iter(output.stdout.readline,b''):
strippedLine = line.strip().decode("windows-1251")
# ignore all lines other than for symbol entry
if "Symbol name" not in strippedLine:
continue
# skip a few lines to get to the nameType and name field
output.stdout.readline() # type
nameType = output.stdout.readline().strip().decode("windows-1251")
output.stdout.readline() # hint
name = output.stdout.readline().strip().decode("windows-1251")
# symbol line is in format of Symbol name : <symbol> [(extra info)]
symbol = strippedLine.split(":")[1].strip().split(" ")[0].strip()
name = name.split(":")[1].strip()
nameType = nameType.split(":")[1].strip()
if nameType == "no prefix":
finalMapping = symbol
elif nameType == "name":
finalMapping = name
elif nameType == "undecorate":
finalMapping = "_" + name
elif nameType == "exportas":
# exportas is seemingly used for symbol aliases, and can be ignored
# since we process this table by enumerating exports, we only
# see the names after they've gone through exportas.
continue
else:
raise ValueError(importLibPath, name, nameType)
if name in symbolTable and symbolTable[name] != finalMapping:
raise ValueError(importLibPath, name, symbolTable[name], finalMapping)
symbolTable[name] = finalMapping
return symbolTable
# Generate the same folder structure as the repo
# i.e. 140_debug\vcrt_fwd_x64_debug\concrt140d_app
def GetOutputFolder(arch, isRelease, module):
folderSuffix = "release" if isRelease else "debug"
return str.format(r"140_{0}\vcrt_fwd_{1}_{0}\{2}_app", folderSuffix, arch, module)
def WriteVersionInfo(resFile, module):
VersionResStyle = VCVersion.replace(".", ",") + ",0"
resFile.write(f'''
#include <Windows.h>
VS_VERSION_INFO VERSIONINFO
FILEVERSION {VersionResStyle}
PRODUCTVERSION {VersionResStyle}
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
FILEOS VOS__WINDOWS32
FILETYPE VFT_DLL
FILESUBTYPE VFT2_UNKNOWN
BEGIN
BLOCK "StringFileInfo"
BEGIN
BLOCK "040904E4"
BEGIN
VALUE "CompanyName", "Microsoft Corporation"
VALUE "FileDescription", "{module} Forwarder"
VALUE "FileVersion", "{VCVersion}"
VALUE "InternalName", "{module}_app"
VALUE "ProductName", "{module} Forwarder"
VALUE "ProductVersion", "{VCVersion}"
END
END
BLOCK "VarFileInfo"
BEGIN
VALUE "Translation", 0x0409, 1252
END
END
''')
def WriteProjectFile(projectFile, guid, module, arch, isRelease):
config = "Debug" if not isRelease else "Release"
onInDebug = "true" if not isRelease else "false"
offInDebug = "false" if not isRelease else "true"
dbgDefine = "_DEBUG" if not isRelease else "NDEBUG"
optimization = "Disabled" if not isRelease else "MaxSpeed"
arch = archProjectMap[arch]
if guid is None:
guid = str(uuid.uuid4()).upper()
cleanRootNamespace = module.replace("_", "") + "app"
projectFile.write(f'''<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup Label="ProjectConfigurations">
<ProjectConfiguration Include="{config}|{arch}">
<Configuration>{config}</Configuration>
<Platform>{arch}</Platform>
</ProjectConfiguration>
</ItemGroup>
<PropertyGroup Label="Globals">
<VCProjectVersion>15.0</VCProjectVersion>
<ProjectGuid>{{{guid}}}</ProjectGuid>
<Keyword>Win32Proj</Keyword>
<RootNamespace>{cleanRootNamespace}</RootNamespace>
<WindowsTargetPlatformVersion>10.0.22621.0</WindowsTargetPlatformVersion>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='{config}|{arch}'" Label="Configuration">
<ConfigurationType>DynamicLibrary</ConfigurationType>
<UseDebugLibraries>{onInDebug}</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
<WholeProgramOptimization>{offInDebug}</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
<ImportGroup Label="Shared">
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='{config}|{arch}'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='{config}|{arch}'">
<LinkIncremental>{onInDebug}</LinkIncremental>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='{config}|{arch}'">
<ClCompile>
<PrecompiledHeader>NotUsing</PrecompiledHeader>
<WarningLevel>Level3</WarningLevel>
<Optimization>{optimization}</Optimization>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>{dbgDefine};_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
</ClCompile>
<Link>
<SubSystem>Windows</SubSystem>
<EnableCOMDATFolding>{offInDebug}</EnableCOMDATFolding>
<OptimizeReferences>{offInDebug}</OptimizeReferences>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalOptions>/NOENTRY %(AdditionalOptions)</AdditionalOptions>
</Link>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="{module}_app.cpp" />
</ItemGroup>
<ItemGroup>
<ResourceCompile Include="version.rc" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>''')
def GetProjectGuid(projectFile):
for line in iter(projectFile.readline,b''):
strippedLine = line.strip()
# ignore all lines other than for symbol entry
if "ProjectGuid" not in strippedLine:
continue
return strippedLine.split("{")[1].split("}")[0]
# main logic to go through each module and generate forwarders
errors = []
for arch in archs:
for item in GetModules(arch):
modulePath = item[0]
module = os.path.splitext(os.path.basename(modulePath))[0]
if module in importLibMapping.keys() and None == importLibMapping[module]:
# We're skipping this library on purpose.
continue
symbolMapping = GenerateSymbolMapping(os.path.join(GetImportLibFolder(arch), importLibMapping[module]))
outputFolder = GetOutputFolder(arch, item[1], module)
if not os.path.exists(outputFolder):
os.makedirs(outputFolder)
projects = glob.glob(os.path.join(outputFolder, "*.vcxproj"))
existingProjectGuid = None
if len(projects) == 1:
with open(projects[0], "r") as projectFile:
existingProjectGuid = GetProjectGuid(projectFile)
with open(os.path.join(outputFolder, str.format("{0}_app.vcxproj", module)), "w") as projectFile:
WriteProjectFile(projectFile, existingProjectGuid, module, arch, item[1])
with open(os.path.join(outputFolder, "version.rc"), "w") as resFile:
WriteVersionInfo(resFile, module)
outputFile = open(os.path.join(outputFolder, module + "_app.cpp"), "w")
output = subprocess.Popen([GetDumpbin(), "/exports", modulePath], stdout=subprocess.PIPE)
headerParsed = False
for line in iter(output.stdout.readline,b''):
strippedLine = line.strip().decode("windows-1251")
if not headerParsed:
if ("ordinal" in strippedLine and "hint" in strippedLine):
# Skip line after header
output.stdout.readline()
headerParsed = True
continue
if strippedLine == "Summary":
break
if strippedLine == "":
continue
function = list(filter(None, strippedLine.split(" ")))[3]
if function not in symbolMapping:
# handle edge case for _EH_PROLOG as for some reason it is not in the symbol table and is only in X86.
if function == "_EH_prolog":
outputFile.write(str.format("""#pragma comment(linker, "/export:{0}={1}.{2}")\n""", "__EH_prolog", module, function))
else:
errors += [[arch, module, function]]
else:
outputFile.write(str.format("""#pragma comment(linker, "/export:{0}={1}.{2}")\n""", symbolMapping[function], module, function))
outputFile.close()
print(errors)