JDevlieghere added a comment.

In D148380#4270085 <https://reviews.llvm.org/D148380#4270085>, @bulbazord wrote:

> In D148380#4269876 <https://reviews.llvm.org/D148380#4269876>, @bulbazord 
> wrote:
>
>> In D148380#4269862 <https://reviews.llvm.org/D148380#4269862>, @JDevlieghere 
>> wrote:
>>
>>> Does this actually have to be a //recursive// mutex?
>>
>> Good point, I don't think it does. I'll update this.
>
> Scratch that -- It unfortunately does need to be a recursive mutex. 
> `PathMappingList` has a callback that may try to perform another operation on 
> the list itself. This happens if you try to use `target modules search-paths 
> add` -- We append to the list, the specified callback tries to read the size 
> of the list. With a std::mutex we deadlock.

I see, and I assume it doesn't make sense to unlock the mutex before the 
callback?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D148380/new/

https://reviews.llvm.org/D148380

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