RaiseOn suspends the target, reads its context and, while it is in host
code, resumes it and samples again after SwitchToThread. On a 16-core
Ryzen 9 5950X (Windows 11 22H2) that resampled the writer of
guest_raise_in_host_code about every 10 us before it could run: in the
raise that hung, 4,989 samples over 50 ms all found it in ucrtbase, so
the 50 ms host-code limit ran out and the handler was redirected into
fwrite, where it deadlocked on the stream lock (the test timed out at
30 s on every run). In a passing raise the samples sat at one RIP for
14,695 of 14,703 samples and the raise took 145 ms.
Spin for 20 us before each new host-code sample, so the target gets to
leave host code. With that, guest_raise_in_host_code passes 5 of 5 runs,
no raise is redirected in host code, and the longest raise is 0.46 to
0.53 ms. Other samples keep SwitchToThread.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
FreeBSD 11.4's lookup() (sys/kern/vfs_lookup.c) fails with ENOTDIR when
a path with a trailing slash ends at something that is not a directory.
On Windows a mount alias dropped the slash, and the host calls do not
report ENOTDIR for "file\", so unlink, rename and open acted on the file
or failed with EINVAL. Guest path resolution now rejects an existing
non-directory named with a trailing slash with ENOTDIR on every host, and
a mount alias keeps the slash on Windows as it does on Linux and macOS.
FreeBSD keeps every character device on devfs, whose devfs_statfs reports
512-byte blocks, 2 blocks and nothing free. Windows threw for any console,
NUL or the guest random device, and Linux described the host's /dev mount.
A kqueue now returns EINVAL, as getvnode does.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
sosend_generic fails a send on a socket that can send no more with EPIPE
before it looks at so_error. Winsock reports the same send as WSAECONNABORTED
or WSAECONNRESET, which reached the guest as ECONNABORTED or ECONNRESET.
A stream send now maps both to EPIPE. The send-after-close checks of
guest_tcp, guest_socket_read_write and guest_socket_pair run on Windows too.
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
FreeBSD 11's kern_connectat fails a nonblocking connect that is still
connecting with EINPROGRESS (36), a second one while it is still
connecting with EALREADY, and soconnectat fails one on a connected
stream socket with EISCONN. On Windows connect has reported
WSAEWOULDBLOCK as EINPROGRESS since 79e162110, but the poll test still
accepted EAGAIN (35) and the socket error numbers debt entry still
listed the gap. Require 36 in the poll test and cut the stale sentence.
PS5VR (PPSA99177) reads sysctl {CTL_KERN, KERN_PROC, KERN_PROC_ENV, pid}
for its own pid at start-up and stopped on "unsupported MIB 1.14.35.<pid>".
The call now returns the empty start-up environment that environ and
libc's getenv also begin with, and follows FreeBSD 11's
sysctl_kern_proc_env for the errors: EINVAL for a MIB without exactly one
pid, ESRCH for another pid or -1, EPERM for a write.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The PS5 3.20 export lists have ktimer_* in libkernel as well as
libkernel_sys, and on Windows a libkernel import never reaches
libkernel_sys. The implementation moves unchanged to
libkernel/Time/Ktimer.cpp.
Dean