The APC delivery was allocated after SuspendThread, so a target holding
the allocator lock deadlocked the raising thread; it is now allocated
before the suspend. The wait count a raise checks lived in the target's
thread_local storage and dangled once the thread exited; it is now a
member of PthreadPrivate, which TimedWait counts into through a
thread-local pointer bound when the thread starts, and a raise on a
thread that already finished returns ESRCH. TechnicalDebt gets one line
per unverified choice: Windows only, the FreeBSD ucontext layout, the
signal mask, the YMM upper halves, and delivery to threads outside
TimedWait.
AI-assisted: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
20 of the 31 NIDs have names in shadPS4's aerolib list. They are declared
under those names; POSIX sleep is implemented. The NpPartner001 and Psml
MFSR2 exports stay unnamed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
MAP_FIXED | MAP_NO_OVERWRITE over a range that already holds an
allocation fails with ENOMEM and leaves the mapping in place, as in
fpPS4's TVirtualManager.check_fixed. UFC 6 (PPSA23566) relies on it to
probe for a free address and aborted on the throw.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
UFC 6 (PPSA23566) passes type 0 to pthread_mutexattr_settype during
startup. libkernel rejects it with EINVAL and leaves the attribute
unchanged, as fpPS4's decompiled body does, instead of aborting.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(libkernel): implement sceKernelReleaseFlexibleMemory
Unmaps the range through sceKernelMunmap, which returns its pages to
the flexible memory budget, as fpPS4 and prosper do.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* test(libkernel): keep the flexible memory release check apart from the batch map checks
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
A thread suspended inside a system call returns through sysret, which
overwrites rcx and r11, so the delivery address passed in rcx was
garbage when the redirected thread resumed. PPSA12544 crashed that way
on its SaveDataProcessQueue thread, blocked in a host wait when Unity's
GC raised SIGUSR1. The redirected rip is now an entry stub that takes
the delivery from its fixed place above rsp. It also stores the live
general registers into the delivery's context first: the snapshot taken
while the thread was in the system call still holds the call number in
rax instead of its result, which the restore would have handed back to
the wait.
The guest test raises at a thread blocked on a host mutex in 20 rounds
and expects each delivery once the wait returns; it fails without this
change.
AI-assisted: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Four sources defined NOMINMAX unconditionally, which redefines the macro the build already passes and warns on every MinGW build. Use the #ifndef guard the rest of the tree uses.
The redirect entry's Windows x64 home area started inside the guest's
128-byte red zone, and the interrupted thread freed the delivery on the
heap, which it may have been suspended inside. The delivery is now copied
onto the target stack below the red zone, with the home area below it, and
the copy is refused when those pages are not committed.
AI-assisted: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A title's libc.prx passes the dso address of __cxa_thread_atexit to
_sceKernelRtldThreadAtexitIncrement and fails the registration when it
returns nonzero. Increment takes a reference on the loaded image that
contains the address, so it stays mapped while thread_local destructors
are pending, and Decrement releases one. An address outside every
loaded image and a Decrement without a reference throw.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ubuntu's GCC links with --as-needed by default, and the fixture uses
nothing from libc or libstdc++, so it ended up with no DT_NEEDED entry
and the dynamic string test had no needed names to check.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Returns the CPU mask threads get by default (DEFAULT_THREAD_AFFINITY,
0x1FFF), the value itself rather than an error code.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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