requesting review on JDK-8348828: Windows dll loading now resolves symlinks

Alan Bateman alan.bateman at oracle.com
Tue Oct 7 16:08:52 UTC 2025



On 07/10/2025 16:15, Benjamin Peterson wrote:
> I've had a PR for the native library loading code up for a months that
> I'd appreciate any review on:
> https://github.com/openjdk/jdk/pull/24694
>
> To summarize the issue and proposed fix: Before OpenJDK 24,
> System.loadLibrary on Windows passed symbolic links unresolved to the
> underlying LoadLibrary function. JDK-8003887 caused symbolic links to
> be resolved by Java before the system LoadLibrary function.
> Unfortunately, LoadLibrary is clever and may mangle the filename
> passed to it, which means passing a symlink may not have the same
> behavior as presenting the fully resolved path. I propose to fix this
> problem in the PR by disabling LoadLibrary's clever mangling behavior.
>
The reason this didn't come to a conclusion is because this isn't really 
a JDK bug, instead it's a about a strange environment where some 
"mystery product" has moved the DLLs out the JDK run-time image 
directory and put them somewhere without the .dll suffix. The JDK 
expects the DLLs to be in the bin directory and named ".dll".  So it's 
really a question as to whether the JDK should accept a change to allow 
this strange setup.

-Alan
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