Internal testing has shown these result in higher committed memory usage in some systems.
Also Ob2 is already implied by O2, so that can be removed as well.
There are still some other issues not addressed here, but it's a start.
Workarounds for false-positive reports:
- `RasterizerAccelerated`: Put a gigantic array behind a `unique_ptr`,
because UBSan has a [hardcoded limit](https://stackoverflow.com/questions/64531383/c-runtime-error-using-fsanitize-undefined-object-has-a-possibly-invalid-vp)
of how big it thinks objects can be, specifically when dealing with
offset-to-top values used with multiple inheritance. Hopefully this
doesn't have a performance impact.
- `QueryCacheBase::QueryCacheBase`: Avoid an operation that UBSan thinks
is UB even though it at least arguably isn't. See the link in the
comment for more information.
Fixes for correct reports:
- `PageTable`, `Memory`: Use `uintptr_t` values instead of pointers to
avoid UB from pointer overflow (when pointer arithmetic wraps around
the address space).
- `KScheduler::Reload`: `thread->GetOwnerProcess()` can be `nullptr`;
avoid calling methods on it in this case. (The existing code returns
a garbage reference to a field, which is then passed into
`LoadWatchpointArray`, and apparently it's never used, so it's
harmless in practice but still triggers UBSan.)
- `KAutoObject::Close`: This function calls `this->Destroy()`, which
overwrites the beginning of the object with junk (specifically a free
list pointer). Then it calls `this->UnregisterWithKernel()`. UBSan
complains about a type mismatch because the vtable has been
overwritten, and I believe this is indeed UB. `UnregisterWithKernel`
also loads `m_kernel` from the 'freed' object, which seems to be
technically safe (the overwriting doesn't extend as far as that
field), but seems dubious. Switch to a `static` method and load
`m_kernel` in advance.
Allow for displaying options in the home options that are disabled with messages that explain why they are disabled.
This includes reasoning for the GPU driver installation button.
MinGW's strftime implementation does not work and cannot be used to
determine the time zone. Besides that, the string operations are
actually unnecessary since we can get the offset from
std::localtime.
Compare localtime to gmtime to find the zone offset on all platforms.
While this can be convenient in some scenarios, this will be a big problem for users trying to sideload different APK versions. If they forget the last one they had installed, they could have problems installing a new copy.
This allows to share the mappings between Nintendo and non-Nintendo controllers.
Breaks the controller configuration for existing users who are using a Nintendo controller.
(Documentation of the hint 92b3c53c92/include/SDL_hints.h (L512-L532))
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Valeri Ochinski
GPUCode
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Alexandre Bouvier
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Charles Lombardo
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