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A tool to decompile MSVC PDB files to C++ source code.

License: MIT License

Rust 99.62% Python 0.38%

cpp msvc pdb rust windows xbox xbox360 xbox-one decompiler decompile

pdb-decompiler's Introduction

PDB Decompiler

About
Usage
Contributing

About

A tool to decompile MSVC PDB files to C++ source code.

This tool is a work in progress and will most likely crash, have duplicate output, have invalid output, or miss output entirely. Feel free to file an issue or submit a pull request.

Usage

cargo run --release -- --out=/path/to/out/ --pdb=/path/to/file.pdb --base-address=0x180000000 > file.pdb.log

Short	Long	Description
`-o`	`--out`	The output directory to dump all C++ code to.
`-p`	`--pdb`	The file path to the MSVC PDB file to decompile.
`-b`	`--base-address`	The base address to add when resolving an RVA (optional).

Contributing

Any assistance or valid criticism would be appreciated. Please feel free to have a look at some of the open issues, especially those tagged with help wanted.

pdb-decompiler's People

Contributors

Stargazers

Watchers

Forkers

rodrigobmg fengjixuchui hayate891 hengle iq-scm apprentice9999

pdb-decompiler's Issues

Determining source file and line information for global symbols (UDT, modules)

Currently there appears to be no way to determine what source file and line a global symbol belongs to, which particularly afflicts decompilation of some user datatypes. Not all PDB files have identifier data in the IPI stream, or any private user datatypes, but may have global symbols which have all of the type information that would typically be present in the IPI stream.

While it is possible to keep track of the previous module of some global symbols by way of iterating over the module contributions, this still does not help with telling us which file and line in the module's include hierarchy they originate from. How are we supposed to retrieve this data?

ERROR: could not decompile PDB because it does not contain a string table: StreamNameNotFound

using official Microsoft pdb file for mmc.exe link
Running in Github CodeSpaces

mmc.pdb (notepad++ opened)

Determine the format of float constant values

Float constants that have a value appear to have a non-standard format? To be determined.

Map out include hierarchy

Noting that a header file is of extension .h/.hpp/.inc/.inl/etc, and a source file is of extension .c/.cpp/.cc/etc:

Currently all header files are lacking #include statements.
Source files also have a flattened list of #include statements, which is unnecessary.

It might be useful to store a mapping of each type's index to its declaring header file. This would allow for a list of all required #include statements to be generated for each header file. Once header files have their generated list of #include statements, then the flattened list of #include statements in each source file can be truncated (potentially) to only the required #include statements, allowing for carry-over #include statements from header files.

Construct inline unions and structures based on field offsets

Field lists do not store inline unions and structures as unions and structures, instead are only denoted by having a field offset that collides with another field offset. Ideally, when populating a field list, it would be ideal to construct inline unions and structures based on the colliding field offsets.

Unhandled characters in build info arg

thread 'main' panicked at 'Unhandled characters in build info arg: 'Brepro'', src\cpp\module.rs:530:32
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library\std\src\panicking.rs:575
   1: core::panicking::panic_fmt
             at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library\core\src\panicking.rs:64
   2: pdb_decompiler::cpp::module::Module::add_build_info
             at .\src\cpp\module.rs:530
   3: pdb_decompiler::process_id_information
             at .\src\main.rs:188
   4: pdb_decompiler::decompile_pdb
             at .\src\main.rs:108
   5: pdb_decompiler::main
             at .\src\main.rs:76
   6: core::ops::function::FnOnce::call_once<enum2$<core::result::Result<tuple$<>,alloc::boxed::Box<dyn$<core::error::Error>,alloc::alloc::Global> > > (*)(),tuple$<> >
             at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74\library\core\src\ops\function.rs:250```

Determine when to include constant declarations in source files

Currently there is no differentiation between a constant variable reference and a declaration. This needs to be resolved. Determine when to include constant declarations in source files.

Build namespace blocks where necessary (AST)

C++ symbols store their namespace. Currently, the namespace is left inline in the symbol when decompiled. It would be ideal to determine where namespace are used and construct namespace blocks in the output source files.

error: Type 124 not found on windows

i get in log file ERROR: could not decompile PDB because it failed to process id info: Type 124 not found

Find the corresponding source files of top-level user datatype symbols (`S_UDT`)

Find the corresponding source files of top-level user datatype symbols (S_UDT).

Currently, typedef are not loaded correctly due to being replaced with their underlying type at compile time. The source file and line information should be retrievable for each typedef, hower. To be determined.

Unhandled characters in build info args

Hello, im getting a weird error, something about MultipleProcessSupport flag?
here is the log

0x180000000`
thread 'main' panicked at src/cpp/module.rs:873:36:
Unhandled characters in build info arg: 'MP1...'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Im running the script on ubuntu 22.04 and rustc 1.74.0

Unhandled characters in build info arg: 'source-charset:utf-8'

i seem to be getting this error and i don't know how to solve it here is the log:

Running `target/release/pdb-decompiler --out=outp --pdb=fnaf9-Win64-Shipping.pdb`
thread 'main' panicked at 'Unhandled characters in build info arg: 'source-charset:utf-8'; Data: "-Zc:inline -nologo -Oi -c -Gw -Gy -Zm1000 -wd4819 -D_CRT_STDIO_LEGACY_WIDE_SPECIFIERS=1 -D_SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS=1 -D_DISABLE_EXTENDED_ALIGNED_STORAGE -source-charset:utf-8 -execution-charset:utf-8 -Ob2 -Ox -Ot -GF -errorreport:prompt -D_HAS_EXCEPTIONS=0 -Z7 -MD -bigobj -fp:fast -Zo -Zp8 -we4456 -we4458 -we4459 -wd4463 -we4668 -wd4244 -wd4838 -ID:\BuildAgent\work\FNAF9\Engine\Source -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Launch\Private -ID:\BuildAgent\work\FNAF9\Engine\Source\Developer\DerivedDataCache\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\TraceLog\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Core\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\CoreUObject -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\CoreUObject\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\Engine -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Engine\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Engine\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\NetCore -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Net -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Net\Core\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Net\Core\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\ApplicationCore\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\RHI\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Json\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\SlateCore -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SlateCore\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\InputCore -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\InputCore\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\InputCore\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\Slate -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Slate\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\ImageWrapper -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\ImageWrapper\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Messaging\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\MessagingCommon\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\RenderCore\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Analytics -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Analytics\AnalyticsET\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Analytics\Analytics\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Sockets\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Net\Common\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\AssetRegistry -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AssetRegistry\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\EngineMessages -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\EngineMessages\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\EngineSettings -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\EngineSettings\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\EngineSettings\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SynthBenchmark\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\Renderer -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Renderer\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\GameplayTags -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\GameplayTags\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\GameplayTags\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\DeveloperSettings -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\DeveloperSettings\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\PacketHandler -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PacketHandlers -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PacketHandlers\PacketHandler\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PacketHandlers\PacketHandler\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PacketHandlers\ReliabilityHandlerComponent\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\AudioPlatformConfiguration -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AudioPlatformConfiguration\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\MeshDescription -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\MeshDescription\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\StaticMeshDescription -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\StaticMeshDescription\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PakFile\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\RSA\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\NetworkReplayStreaming -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\NetworkReplayStreaming\NetworkReplayStreaming\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\PhysicsCore -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PhysicsCore\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\Chaos -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Experimental -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Experimental\Chaos\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Experimental\ChaosCore\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\Intel -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Experimental\Voronoi\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SignalProcessing\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\AudioExtensions -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AudioExtensions\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AudioMixerCore\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\PropertyAccess -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PropertyAccess\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\ClothingSystemRuntimeInterface -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\ClothingSystemRuntimeInterface\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\AudioMixer -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AudioMixer\Classes -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AudioMixer\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Developer -ID:\BuildAgent\work\FNAF9\Engine\Source\Developer\TargetPlatform\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\AnimationCore -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AnimationCore\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\MoviePlayer -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\MoviePlayer\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Networking\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Projects\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SandboxFile\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\Serialization -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Serialization\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Cbor\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\Overlay -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Overlay\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\PreLoadScreen\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\InstallBundleManager\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\HeadMountedDisplay -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\HeadMountedDisplay\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\AugmentedReality -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\AugmentedReality\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\MRMesh -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\MRMesh\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\MediaUtils -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\MediaUtils\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Media\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\ClothingSystemRuntimeNv -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\ClothingSystemRuntimeNv\Public -ID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Inc\ClothingSystemRuntimeCommon -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\ClothingSystemRuntimeCommon\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Developer\AutomationController\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Developer\TaskGraph\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SlateNullRenderer\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SlateRHIRenderer\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\Launch\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\Runtime\SessionServices\Public -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PxShared\include -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PxShared\include\cudamanager -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PxShared\include\filebuf -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PxShared\include\foundation -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PxShared\include\pvd -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PxShared\include\task -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PhysX_3.4\Include -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PhysX_3.4\Include\cooking -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PhysX_3.4\Include\common -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PhysX_3.4\Include\extensions -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\PhysX_3.4\Include\geometry -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\include -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\include\clothing -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\include\nvparameterized -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\include\legacy -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\include\PhysX3 -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\common\include -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\common\include\autogen -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\framework\include -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\framework\include\autogen -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\shared\general\RenderDebug\public -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\shared\general\PairFilter\include -ID:\BuildAgent\work\FNAF9\Engine\Source\ThirdParty\PhysX3\APEX_1.4\shared\internal\include -I"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\INCLUDE" -I"C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.2\include\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" -FID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Shipping\Engine\SharedPCH.Engine.ShadowErrors.h -YuD:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Shipping\Engine\SharedPCH.Engine.ShadowErrors.h -FpD:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Shipping\Engine\SharedPCH.Engine.ShadowErrors.h.pch -FID:\BuildAgent\work\FNAF9\fnaf9\Intermediate\Build\Win64\fnaf9\Shipping\Launch\Definitions.Launch.h -TP -GR- -W4 -showIncludes -X"', src/cpp/module.rs:1211:32
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Issue running on windows

Hi, I've tried to run this tool but gives me
Error: StreamNameNotFound
I'm on Windows 11

Thanks

ERROR: could not decompile PDB because it The filename, directory name, or volume label syntax is incorrect. (os error 123)

This happens on The King of Fighters XIV. You can find the debug symbols via http://debugging.games/.

EDIT: User error. Fixed by copying pdb-decompiler into the same directory as the PDB file.

Panicked: Unhandled characters in build info arg:

Hello,

When I try to run, I get the following error

    Finished release [optimized] target(s) in 11.83s
     Running `target\release\pdb-decompiler.exe --out=./out/ --pdb=test.pdb`
thread 'main' panicked at 'Unhandled characters in build info arg: 'analyze-'', src\cpp\module.rs:507:32
stack backtrace:

Propagate parameter names from definition to declaration

Type definitions do not store the names of their function parameters in the function declaration. In order to obtain them, the function definition must be traversed in the module.

A better C++ AST

The current C++ AST (if you can even call it that) is extremely non-optimal. It would be ideal to leave the PDB data in place for as long as possible before converting to the C++ AST in order to alleviate in duplicate code elimination, among other things.

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