mingw-ldd

Lists dependencies of a PE (exe/dll) file.

Features

• Mimics ldd output
• Allows to specify dll lookup paths
• Has no hardcoded dll lookup paths
• Makes sure the dependencies are of the same CPU architecture
• Sorts the output by dll name
• Can also print per-dep or tree outputs
• Uses multiprocessing to speed up the dll lookup

Note that the arguments do not mimic ldd arguments.

Usage

The script can be installed from PyPi:

pip install mingw_ldd
mingw-ldd --help

The script can be used stanalone, given you have pefile installed:

sudo apt-get install python3-pefile
./mingw_ldd/mingw_ldd.py --help

or:

sudo apt-get install virtualenv
virtualenv -p /usr/bin/python3 env
./env/bin/pip install -r requirements.txt
./env/bin/python3 ./mingw_ldd/mingw_ldd.py --help

The mingw_ldd.py script file is self-contained and can be easily copied into other project's codebase.

Example

$ mingw-ldd.py -h
usage: mingw_ldd.py [-h] [--output-format {ldd-like,per-dep-list,tree}] --dll-lookup-dirs DLL_LOOKUP_DIR [DLL_LOOKUP_DIR ...] [--disable-multiprocessing] PE_FILE

Ldd-like output:

$ ./mingw-ldd.py /home/nurupo/qtox/workspace/i686/qtox/release/libtoxcore.dll \
                 --dll-lookup-dirs /usr/lib/gcc/i686-w64-mingw32/*-posix \
                                   /usr/i686-w64-mingw32/lib \
                                   /home/nurupo/qtox/workspace/i686/qtox/release
        advapi32.dll => not found
        iphlpapi.dll => not found
        kernel32.dll => not found
        libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
        libopus-0.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libopus-0.dll
        libsodium-23.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libsodium-23.dll
        libvpx.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libvpx.dll
        libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
        msvcrt.dll => not found
        user32.dll => not found
        ws2_32.dll => not found

Per-dep-list output:

$ ./mingw-ldd.py /home/nurupo/qtox/workspace/i686/qtox/release/libtoxcore.dll \
                 --output-format per-dep-list \
                 --dll-lookup-dirs /usr/lib/gcc/i686-w64-mingw32/*-posix \
                                   /usr/i686-w64-mingw32/lib \
                                   /home/nurupo/qtox/workspace/i686/qtox/release
/home/nurupo/qtox/workspace/i686/qtox/release/libopus-0.dll
        KERNEL32.dll => not found
        libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
        msvcrt.dll => not found
/home/nurupo/qtox/workspace/i686/qtox/release/libsodium-23.dll
        ADVAPI32.dll => not found
        KERNEL32.dll => not found
        libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
        msvcrt.dll => not found
        USER32.dll => not found
/home/nurupo/qtox/workspace/i686/qtox/release/libtoxcore.dll
        IPHLPAPI.DLL => not found
        KERNEL32.dll => not found
        libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
        libopus-0.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libopus-0.dll
        libsodium-23.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libsodium-23.dll
        libvpx.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libvpx.dll
        libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
        msvcrt.dll => not found
        WS2_32.dll => not found
/home/nurupo/qtox/workspace/i686/qtox/release/libvpx.dll
        KERNEL32.dll => not found
        libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
        libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
        msvcrt.dll => not found
/usr/i686-w64-mingw32/lib/libwinpthread-1.dll
        KERNEL32.dll => not found
        msvcrt.dll => not found
/usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
        KERNEL32.dll => not found
        libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
        msvcrt.dll => not found

Tree output:

$ ./mingw-ldd.py /home/nurupo/qtox/workspace/i686/qtox/release/libtoxcore.dll \
                 --output-format tree \
                 --dll-lookup-dirs /usr/lib/gcc/i686-w64-mingw32/*-posix \
                                   /usr/i686-w64-mingw32/lib \
                                   /home/nurupo/qtox/workspace/i686/qtox/release
/home/nurupo/qtox/workspace/i686/qtox/release/libtoxcore.dll
├── IPHLPAPI.DLL => not found
├── KERNEL32.dll => not found
├── libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
│   ├── KERNEL32.dll => not found
│   ├── libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
│   │   ├── KERNEL32.dll => not found
│   │   └── msvcrt.dll => not found
│   └── msvcrt.dll => not found
├── libopus-0.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libopus-0.dll
│   ├── KERNEL32.dll => not found
│   ├── libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
│   │   ├── KERNEL32.dll => not found
│   │   ├── libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
│   │   │   ├── KERNEL32.dll => not found
│   │   │   └── msvcrt.dll => not found
│   │   └── msvcrt.dll => not found
│   └── msvcrt.dll => not found
├── libsodium-23.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libsodium-23.dll
│   ├── ADVAPI32.dll => not found
│   ├── KERNEL32.dll => not found
│   ├── libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
│   │   ├── KERNEL32.dll => not found
│   │   ├── libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
│   │   │   ├── KERNEL32.dll => not found
│   │   │   └── msvcrt.dll => not found
│   │   └── msvcrt.dll => not found
│   ├── msvcrt.dll => not found
│   └── USER32.dll => not found
├── libvpx.dll => /home/nurupo/qtox/workspace/i686/qtox/release/libvpx.dll
│   ├── KERNEL32.dll => not found
│   ├── libgcc_s_sjlj-1.dll => /usr/lib/gcc/i686-w64-mingw32/9.3-posix/libgcc_s_sjlj-1.dll
│   │   ├── KERNEL32.dll => not found
│   │   ├── libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
│   │   │   ├── KERNEL32.dll => not found
│   │   │   └── msvcrt.dll => not found
│   │   └── msvcrt.dll => not found
│   ├── libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
│   │   ├── KERNEL32.dll => not found
│   │   └── msvcrt.dll => not found
│   └── msvcrt.dll => not found
├── libwinpthread-1.dll => /usr/i686-w64-mingw32/lib/libwinpthread-1.dll
│   ├── KERNEL32.dll => not found
│   └── msvcrt.dll => not found
├── msvcrt.dll => not found
└── WS2_32.dll => not found

Performance

The performance might be a bit slower than expected due to pefile sometimes taking up to few seconds to parse a dll. We try to mitigate this by multiprocessing pefile's parsing. Using the most up to date pefile should help too. Specifically, the current version of pefile on PyPi -- version 2019.4.18, is noticeably faster than the version 2018.8.8 packaged in Debian Buster.

If the performance is an issue, you could give these projects a try:

• ntldd - a cross-platform ldd-like program written in C
• Dependency Walker - a freeware Windows GUI application that displays PE dependencies

Disclaimer

This project is not affiliated with MinGW, the name "mingw-ldd" is used primarely to facilitate online search discoverability as MinGW suit is missing ldd.

License

MIT