powf(1.0, nan) returned 0x7fc00001; FreeBSD msun (lib/msun/src/e_powf.c)
returns 0x3f800000. That case now follows FreeBSD; other inputs are
unchanged.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
On Linux a guest stderr redirect also moves the host's: guest
descriptors are host descriptors, and the guest stderr stream wraps the
host stderr FILE. After dup2(fd, 2), or freopen(path, mode, stderr) with
full buffering, the libc terminate report, the host fprintf(stderr)
diagnostics and libstdc++'s terminate message go into the title's pipe
or file, and abort() discards what is still buffered. RetroArch
(PPSA99169) reopens stderr onto app0/trace.txt with full buffering, so
its stop on main left no message anywhere.
Before the first guest redirect of descriptor 2 (libkernel dup2, libc
freopen of a stream on descriptor 2), keep a close-on-exec duplicate of
the host descriptor 2 and point the host stderr at an unbuffered stream
on it. The guest stream keeps its own FILE and follows the redirect.
The libc terminate report writes to the kept descriptor with write()
instead of the stderr stream, and libkernel's sceKernelDebugOutText uses
the same kept descriptor.
APS5_SAMPLE_WORKER=<file> now also writes <file stem>.collapsed.txt: one
"frame;...;frame count" line per distinct stack of queue worker 0, root
first, frames as module+0xRVA, which speedscope.app and flamegraph.pl
open. Walks go up to 64 frames, and nothing allocates while the worker is
suspended.
The libraries are built with -fno-asynchronous-unwind-tables, so most of
their functions have no .pdata entry, only a DWARF record in .ehfram, and a
walk ended at the first such frame. The worker's walk now steps those
frames through their record, with the CIE/FDE decoding and the call frame
instructions of libc's unwinder, which move from Unwind.cpp into its
header unchanged. A module is indexed after the worker resumes, the first
time a walk meets it, and every register the step restores is read inside
the worker's stack. The process sampler (APS5_SAMPLE_THREADS) keeps its 12
frames through .pdata.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Throw a guest std::system_error for the Dinkumware _Cpp_error codes,
as in VC12 and microsoft/STL thread0.cpp: the error_code holds the
FreeBSD errno and a guest generic error category modelled in libc, and
what() is the table message followed by the category message. Codes
outside the table throw std::out_of_range. The system_error copy
constructor and assignment now copy the error_code too.
Imported by Deathloop (PPSA01670) and Minecraft Legends (PPSA05510).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
(cherry picked from commit bed1deafdee4b50bea9683a1cead0d0320150eb7)
VLC PPSA85300 imports readdir_r (J0kng1yac3M) from
libSceLibcInternal.prx. Predicted stop after getlogin_r, from relink
registry order (idx 343, call site 0x16A0B91):
FAIL: unresolved ELF import J0kng1yac3M from libSceLibcInternal.prx
The NID is readdir_r in aerolib (tools/nid_names.py --nid J0kng1yac3M:
rename-ready readdir_r); the title binds it to libSceLibcInternal, where
the PS5 payload SDK (ps5-payload-dev/sdk f5d40f02,
sce_stubs/libSceLibcInternal.c) lists it beside readdir, so it goes into
libc next to readdir.
FreeBSD 11.4 (freebsd-src 8c639945, lib/libc/gen/readdir.c:106-135):
save errno and clear it, take the stream lock, read the next entry and
copy _GENERIC_DIRSIZ(dp) bytes of it into the caller's entry, set
*result to the entry or NULL at the end, return errno when the read
fails, otherwise restore errno and return 0. The guest struct dirent is
the SDK's FreeBSD 11 layout (include/freebsd/sys/dirent.h, 264 bytes,
name at 8), and _GENERIC_DIRSIZ equals the recordLength readdir already
computes. The read itself is readdir's, moved into a helper that both
call under the per-stream mutex, so readdir and readdir_r share one
position. A null stream returns EBADF, as readdir sets it; a null entry
or result pointer throws instead of faulting.
The call site is libbluray 1.4.1 _dir_read_posix
(videolan/libbluray 7d94f266, src/file/dir_posix.c:73-88), reached when
VLC opens a Blu-ray folder or ISO. The disassembly at 0x16A0B91 passes a
264-byte stack buffer (sizeof(struct dirent)) and reads d_name at
offset 8.
Tested on Windows (MinGW): guest_directory 3/3 (readdir_r over a
temporary directory to the end gives the same names and types as
readdir, copies only recordLength bytes, keeps errno at the end,
continues the position of an interleaved readdir, EBADF for a null
stream, throw for a null entry).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
(cherry picked from commit 01085afe122d6d2c6af9e54c745e2a7c448f7b24)
Kart PS5 (PPSA99611) stops on gacfOmO8hNs (ceil, per tools/nid_names.py)
from libc.prx once __umodti3 resolves (title run on #4519). ceil rounds
toward positive infinity whatever the rounding mode, keeps the sign of
zero and of results that round to zero, and returns infinities and NaNs
unchanged, as std::ceil does.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
OutRun2006 (PPSA99106) imports nearbyintl and stops at start-up on main. Add the long double round-to-nearest-integer export next to nearbyintf; std::nearbyint rounds under the current direction and raises no inexact exception.
qsort was a heapsort. It sorted correctly, but elements that compare
equal ended in a different order from FreeBSD's Bentley-McIlroy qsort,
in 18947 of 20000 random arrays with repeated keys, and below 7
elements, where FreeBSD's insertion sort keeps equal elements in
place, a heapsort does not. qsort now follows FreeBSD 11 qsort.c,
including its comparator call sequence.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VZWLdTjf1S57iLgn2rcaFb
The Windows unwinder stopped at the first frame of a module without the
project's .ehmeta or .ehfram tables, so an exception could not cross
libstdc++-6.dll and libwinpthread-1.dll (std::call_once through
pthread_once) or system DLLs. For such a frame it now looks up the
function's PE unwind data with RtlLookupFunctionEntry and takes the
caller's registers, including the nonvolatile rsi, rdi and xmm6-xmm15,
from RtlVirtualUnwind. A frame whose unwind data has an exception or
termination handler still stops the walk, since those handlers are not
run.
windows_exceptions gets back the std::call_once case of #1423.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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