Fixes crash that occurs in applications that use both GL and Vulkan,
Like UE5 Vulkan native games. Fixes Ender Magnolia.
The issue here is that UE5 loads libGL first, which initializes our
libGL thunks, setting its X11Manager's functions.
It then loads libvulkan, which calls our oninit constructor, which
because of the symbol conflict, calls in to the libGL thunk's host
functions to reinitialize its function pointers, never initializing the
Vulkan X11Manager's functions. It would then crash as soon as an X11
function was used.
Give them unique symbol names so we don't accidentally look up the
incorrect symbol.
Some applications create multiple Vulkan instances with different sets of
extensions. We might hence miss some of these pointers during the initial
function pointer query.
The Vulkan specification states that querying "global commands" like
vkCreateInstance with a non-NULL instance is undefined behavior. Indeed, some
implementations will return null pointers in such cases.
Instead, we can drop the query from DoSetupWithInstance altogether, since
the library initializer will load the function pointer using dlsym instead.
Fixes#3519.
Pointer types inherently cause data layout compatibility issues, so they're
worth special-casing here. The wrappers will type-pun pointers to 32-bit or
64-bit integers (matching the guest architecture) to avoid direct host-side
use of guest pointers without consideration.
This annotation can be used for data types that can't be repacked
automatically even with custom repack annotations. With ptr_passthrough,
the types are wrapped in guest_layout and passed to the host like that.
This was checking for the wrong debug structure and it wasn't actually
unlinking it correctly from the linked list.
Since it was talking directly to a_0 instead of the current modifying
struct.
Instead of having a stubbed debug report struct, we can just remove the
structure from the linked list. Since we are already abusing a const
cast there anyway.
Fixes Vulkan thunks on Snapdragon.
Justin Becker