AppKit, which SDL uses for windows, Metal surfaces, event pumping and game
controllers, works only on the main thread, and a guest never hands its
thread back. The macOS relinker emits a call to Aps5StartGuest as the
entry of a relinked executable; no library provided it.
- Aps5StartGuest runs the guest entry on a new thread with the stack size
of the main thread (at least 8 MiB) and serves the main dispatch queue
from the run loop of the main thread. The guest ends the process with
exit; a guest entry that returns aborts.
- Aps5RunOnMainThread runs a function on the main thread and waits for it,
or in place where the main thread is the caller or Aps5StartGuest was
never called.
- libSceVideoOut sends its SDL calls through OnMainThread, which carries
the exceptions back to the caller: the initialisation and shutdown of the
video and game controller subsystems, the window, its Vulkan surface and
drawable size, the event polling and the pad, mouse and keyboard input,
which are created and destroyed there. On the other platforms the
functions run in place.
- The flip test starts its tests through Aps5StartGuest on macOS, as a
relinked guest does.
Co-authored-by: mugurc <[email protected]>
The public header declared the unimplemented placeholder int __tls_get_addr(void). It now declares void* __tls_get_addr(const KernelTlsIndex*), the tls_index pointer the ABI passes, and the implementation and the test use that declaration and type instead of their own.
Resolve a FreeBSD/ELF tls_index {module, offset} the way the relinker's
DTPMOD64 values are laid out: on Windows through the PE _tls_index the
module word points at and the thread's ThreadLocalStoragePointer, on
Linux through glibc's __tls_get_addr.
scePthreadMutexTimedlock on a mutex the caller holds, and
scePthreadRwlockTimedrdlock and scePthreadRwlockTimedwrlock on a rwlock
it holds for writing, returned EDEADLK at once. The console returns
ETIMEDOUT, as the prosper console oracle measured. They now sleep until
the timeout and return ETIMEDOUT, as FreeBSD libthr does. The POSIX
timed locks call these and change with them.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
fcntl(fd, F_DUPFD, min) with min at or above RLIMIT_NOFILE duplicated the
descriptor repeatedly until the CRT table was full and then failed with
EMFILE, after opening thousands of descriptors. FreeBSD checks the minimum
first: kern_dup returns EINVAL for FDDUP_FCNTL when new < 0 or
new >= maxfd (sys/kern/kern_descrip.c:836-840). Linux already answers
EINVAL through the host fcntl. Check the minimum against the guest
RLIMIT_NOFILE before the Windows loop.
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
fstat, _fstat, sceKernelFstat, stat, lstat, sceKernelStat and _fstatfs
filled the caller's struct in place, or copied into it after a check that
only tests for null, so a pointer into unmapped memory crashed the host.
Fill a local struct and copy it out with a checked write that fails with
EFAULT. FreeBSD 11.4 does the same after the lookup has succeeded:
copyout(&ub, uap->sb) in sys_fstat (sys/kern/kern_descrip.c:1328),
copyout(&sb, uap->ub) in sys_stat (sys/kern/vfs_syscalls.c:2066) and
copyout(sfp, uap->buf) in sys_fstatfs (sys/kern/vfs_syscalls.c:337).
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
