[WTF] Make CRASH_WITH_INFO more useful when using GCC

• Component: Web Template Framework
• Status: RESOLVED FIXED

[Adrian Perez]

As per the comment in wtf/Assertions.h:

  // GCC does not allow ##__VA_ARGS__ unless GNU extensions are enabled (--std=gnu++NN instead of
  // --std=c++NN) and I think we don't want that, so we'll have a fallback path for GCC. Obviously
  // this will not actually succeed at getting the desired info into registers before crashing, but
  // it's just a fallback anyway.
  //
  // FIXME: When we enable C++20, we should replace ##__VA_ARGS__ with format __VA_OPT__(,) __VA_ARGS__
  // so that we can remove this fallback.

Nowadays we are passing -std=c++20 to the compiler, so we can use __VA_OPT__ and remove the FIXME.

[Adrian Perez]

Created attachment 449917 [details]
Patch

[Michael Catanzaro]

Comment on attachment 449917 [details]
Patch

WinCairo and Windows EWS are red. Maybe we need to wait for Visual Studio 2022?

[Adrian Perez]

(In reply to Michael Catanzaro from comment #2)
> Comment on attachment 449917 [details]
> Patch
> 
> WinCairo and Windows EWS are red. Maybe we need to wait for Visual Studio
> 2022?

Probably, but we can keep using ##__VA_ARGS__ with MSVC, and go with
__VA_OPT__(,) __VA_ARGS__ for GCC/Clang. I'm going to update the patch
to try that.

[Adrian Perez]

Created attachment 449930 [details]
Patch v2

[EWS]

Committed r288577 (246400@main): <https://commits.webkit.org/246400@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 449930 [details].

[Radar WebKit Bug Importer]

<rdar://problem/88040547>