An ITIMER_REAL expiry with a guest SIGALRM handler throws, since guest
handlers are never run from the timer thread. On Linux and Windows that
throw goes through libc's exception runtime, so an uncaught one runs the
guest's std::set_terminate handler. On macOS the host keeps libc++abi,
so the throw ended in libc++abi's terminate and the guest handler never
ran. Throw through the guest runtime there, and record the general
macOS gap in the libc debt file.
Ported from #8658.
Co-authored-by: Himansh Raj <[email protected]>
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The printf family formatted floating-point conversions through the host,
which prints every exact digit and rounds ties to even. The libc.prx
that titles ship keeps the exact digits only down to a position derived
from the binary exponent and prints zeros after them, rounds half up on
the kept digits, and rounds an exact tie down once that exponent
estimate reaches 8. So %.0f of 2.5 is 3 and %.1f of 0.25 is 0.3 there,
and %.20f of 0.1 is 0.10000000000000000555.
Format finite double and long double e, f and g conversions with those
rules from exactly generated digits, on every host. On 600,000 random
formats every output with up to 17 significant digits now matches the
copies bundled with PPSA07923, PPSA05916 and PPSA13934; longer outputs
still differ where the console's extended-precision digits end one unit
lower.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The libc debt entry for %a and %A still described the Windows-only
formatter and said Linux hands %a to glibc; since Linux routes %a and %A
to the same formatter, describe it for both platforms.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The Windows printf family handed %a and %A to the host, whose UCRT prints
a subnormal unnormalised (0x0.0000000000001p-1022) and pads with zeros
even when the - flag is given (%-010a of 1.5 gave 0x001.8p+0). The
libc.prx that titles ship normalises subnormals (0x1p-1074), rounds a
shorter precision half up without renormalising a carry, and lets -
override 0, as C requires.
Finite doubles are now formatted here, checked against three titles'
copies of libc.prx run side by side.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
A nonzero subnormal result from _Stodx, _Stofx or _Stoldx sets neither
errno nor the error argument; only underflow to zero and overflow do.
_Stofx used to keep the ERANGE that strtof sets for an inexact
subnormal. Measured by running firmware 13.60's libSceLibcInternal.sprx
in a Linux host process, not on a console.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Keep #3987's q, D, O, U, width, '-' and trailing '%' handling for
unknown conversions and fold it into this branch's measured path:
'#' and precision are ignored as measured, '+', space, apostrophe
and '0' with a width still throw.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The entry spliced the facet-lifetime sentence into the zeroed-storage claim; restore both, note that the new _Getcat entries ignore the locale name and always build the C facet, and mention std::wclog alongside std::clog.
The Windows printf family threw on the q length modifier, the D, O and U
conversions, an unknown conversion character and a format ending in a percent
sign, where FreeBSD's vfprintf formats the first three and prints the unknown
character itself or stops at the end of the format.
(cherry picked from commit 0e3b2896d228c601cefc992b2895723188ebf0fa)
Disaster