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glibc/glibc-upstream-2.39-127.patch
Arjun Shankar 2a30b8f4b2 Sync with upstream branch release/2.39/master 
Upstream commit: dcaf51b41e259387602774829c45222d0507f90a

- elf: Change ldconfig auxcache magic number (bug 32231)
- Make tst-strtod-underflow type-generic
- Add crt1-2.0.o for glibc 2.0 compatibility tests
- Add tests of more strtod special cases
- Add more tests of strtod end pointer
- Make tst-strtod2 and tst-strtod5 type-generic
- powerpc64le: Build new strtod tests with long double ABI flags (bug 32145)
- Do not set errno for overflowing NaN payload in strtod/nan (bug 32045)
- Improve NaN payload testing
- Make __strtod_internal tests type-generic
- Fix strtod subnormal rounding (bug 30220)
- More thoroughly test underflow / errno in tst-strtod-round
- Test errno setting on strtod overflow in tst-strtod-round
- Add tests of fread
- stdio-common: Add new test for fdopen
- libio: Attempt wide backup free only for non-legacy code
- debug: Fix read error handling in pcprofiledump
- elf: Fix tst-dlopen-tlsreinit1.out test dependency
- elf: Avoid re-initializing already allocated TLS in dlopen (bug 31717)
- elf: Clarify and invert second argument of _dl_allocate_tls_init
- elf: Support recursive use of dynamic TLS in interposed malloc
- nptl: Use <support/check.h> facilities in tst-setuid3
- posix: Use <support/check.h> facilities in tst-truncate and tst-truncate64
- ungetc: Fix backup buffer leak on program exit [BZ #27821]
- ungetc: Fix uninitialized read when putting into unused streams [BZ #27821]
- Make tst-ungetc use libsupport
- stdio-common: Add test for vfscanf with matches longer than INT_MAX [BZ #27650]
- support: Add FAIL test failure helper
- string: strerror, strsignal cannot use buffer after dlmopen (bug 32026)
- Define __libc_initial for the static libc
- x86: Fix bug in strchrnul-evex512 [BZ #32078]
- Adjust check-local-headers test for libaudit 4.0
- x32/cet: Support shadow stack during startup for Linux 6.10
- x86-64: Remove sysdeps/x86_64/x32/dl-machine.h
- support: Add options list terminator to the test driver
- manual/stdio: Further clarify putc, putwc, getc, and getwc
- Fix name space violation in fortify wrappers (bug 32052)
- resolv: Fix tst-resolv-short-response for older GCC (bug 32042)
- Add mremap tests
- mremap: Update manual entry
- linux: Update the mremap C implementation [BZ #31968]
- Enhanced test coverage for strncmp, wcsncmp
- Enhance test coverage for strnlen, wcsnlen

Resolves: RHEL-57776
Resolves: RHEL-57777
Resolves: RHEL-61392
2024-11-20 17:12:17 +01:00

448 lines
14 KiB
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Raw Blame History

commit a7be595c67d12f1a442e3f6894d67e20c7724bed
Author: Joseph Myers <josmyers@redhat.com>
Date: Tue Aug 27 12:41:02 2024 +0000
Fix strtod subnormal rounding (bug 30220)
As reported in bug 30220, the implementation of strtod-family
functions has a bug in the following case: the input string would,
with infinite exponent range, take one more bit to represent than is
available in the normal precision of the return type; the value
represented is in the subnormal range; and there are no nonzero bits
in the value, below those that can be represented in subnormal
precision, other than the least significant bit and possibly the
0.5ulp bit. In this case, round_and_return ends up discarding the
least significant bit.
Fix by saving that bit to merge into more_bits (it can't be merged in
at the time it's computed, because more_bits mustn't include this bit
in the case of after-rounding tininess detection checking if the
result is still subnormal when rounded to normal precision, so merging
this bit into more_bits needs to take place after that check).
Tested for x86_64.
(cherry picked from commit 457622c2fa8f9f7435822d5287a437bc8be8090d)
diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c
index be515ce659b35530..beb97b3d0cf3191a 100644
--- a/stdlib/strtod_l.c
+++ b/stdlib/strtod_l.c
@@ -222,6 +222,7 @@ round_and_return (mp_limb_t *retval, intmax_t exponent, int negative,
mp_size_t shift = MIN_EXP - 1 - exponent;
bool is_tiny = true;
+ bool old_half_bit = (round_limb & (((mp_limb_t) 1) << round_bit)) != 0;
more_bits |= (round_limb & ((((mp_limb_t) 1) << round_bit) - 1)) != 0;
if (shift == MANT_DIG)
@@ -292,6 +293,7 @@ round_and_return (mp_limb_t *retval, intmax_t exponent, int negative,
round_bit = shift - 1;
(void) __mpn_rshift (retval, retval, RETURN_LIMB_SIZE, shift);
}
+ more_bits |= old_half_bit;
/* This is a hook for the m68k long double format, where the
exponent bias is the same for normalized and denormalized
numbers. */
diff --git a/stdlib/tst-strtod-round-data b/stdlib/tst-strtod-round-data
index 84ab705709b24b6c..9489fbcc9ce7eee2 100644
--- a/stdlib/tst-strtod-round-data
+++ b/stdlib/tst-strtod-round-data
@@ -265,3 +265,15 @@
1.000000000000000000000000000000000385185988877447170611195588516985463707620329643077639047987759113311767578125
1.0000000000000000000000000000000001925929944387235853055977942584927318538101648215388195239938795566558837890625
1.00000000000000000000000000000000009629649721936179265279889712924636592690508241076940976199693977832794189453125
+0x30000002222225p-1077
+0x0.7fffffffffffeap-1022
+0x0.7fffffffffffe9p-1022
+0x0.7ffffd4p-126
+0x0.7ffffffffffffffd4p-16382
+0x0.7ffffffffffffffd4p-16383
+0x0.7ffffffffffffffffffffffffffeap-16382
+0x0.7000004p-126
+0x0.70000000000002p-1022
+0x0.70000000000000004p-16382
+0x0.70000000000000004p-16383
+0x0.70000000000000000000000000002p-16382
diff --git a/stdlib/tst-strtod-round-data.h b/stdlib/tst-strtod-round-data.h
index 13e62dd2b0588a16..ed50eb2537bc175c 100644
--- a/stdlib/tst-strtod-round-data.h
+++ b/stdlib/tst-strtod-round-data.h
@@ -15437,4 +15437,376 @@ static const struct test tests[] = {
0x1p+0, false, false,
0x1p+0, false, false,
0x1.0000000000000000000000000001p+0, false, false),
+ TEST ("0x30000002222225p-1077",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x1.800000111111p-1024, false, true,
+ 0x1.8000001111114p-1024, false, true,
+ 0x1.800000111111p-1024, false, true,
+ 0x1.8000001111114p-1024, false, true,
+ true,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ true,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ false,
+ 0x1.800000111111p-1024, false, true,
+ 0x1.8000001111114p-1024, false, true,
+ 0x1.800000111111p-1024, false, true,
+ 0x1.8000001111114p-1024, false, true,
+ true,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false,
+ 0x1.80000011111128p-1024, false, false),
+ TEST ("0x0.7fffffffffffeap-1022",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ true,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ true,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ false,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ true,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false,
+ 0x1.ffffffffffffa8p-1024, false, false),
+ TEST ("0x0.7fffffffffffe9p-1022",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ true,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ true,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ false,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ 0x1.ffffffffffff8p-1024, false, true,
+ 0x1.ffffffffffffcp-1024, false, true,
+ true,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false,
+ 0x1.ffffffffffffa4p-1024, false, false),
+ TEST ("0x0.7ffffd4p-126",
+ false,
+ 0x1.fffffp-128, false, true,
+ 0x1.fffff8p-128, false, true,
+ 0x1.fffffp-128, false, true,
+ 0x1.fffff8p-128, false, true,
+ true,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ true,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ true,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ true,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ true,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false,
+ 0x1.fffff5p-128, false, false),
+ TEST ("0x0.7ffffffffffffffd4p-16382",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0x1.fffffffffffffffp-16384, false, true,
+ 0x1.fffffffffffffff8p-16384, false, true,
+ 0x1.fffffffffffffffp-16384, false, true,
+ 0x1.fffffffffffffff8p-16384, false, true,
+ false,
+ 0x1.fffffffffffffff4p-16384, false, true,
+ 0x1.fffffffffffffff4p-16384, false, true,
+ 0x1.fffffffffffffff4p-16384, false, true,
+ 0x1.fffffffffffffff8p-16384, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ true,
+ 0x1.fffffffffffffff5p-16384, false, false,
+ 0x1.fffffffffffffff5p-16384, false, false,
+ 0x1.fffffffffffffff5p-16384, false, false,
+ 0x1.fffffffffffffff5p-16384, false, false),
+ TEST ("0x0.7ffffffffffffffd4p-16383",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0xf.ffffffffffffff8p-16388, false, true,
+ 0xf.ffffffffffffff8p-16388, false, true,
+ 0xf.ffffffffffffff8p-16388, false, true,
+ 0x1p-16384, false, true,
+ false,
+ 0xf.ffffffffffffff8p-16388, false, true,
+ 0xf.ffffffffffffffcp-16388, false, true,
+ 0xf.ffffffffffffff8p-16388, false, true,
+ 0xf.ffffffffffffffcp-16388, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ true,
+ 0xf.ffffffffffffffa8p-16388, false, false,
+ 0xf.ffffffffffffffa8p-16388, false, false,
+ 0xf.ffffffffffffffa8p-16388, false, false,
+ 0xf.ffffffffffffffa8p-16388, false, false),
+ TEST ("0x0.7ffffffffffffffffffffffffffeap-16382",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0x1.fffffffffffffff8p-16384, false, true,
+ 0x2p-16384, false, true,
+ 0x1.fffffffffffffff8p-16384, false, true,
+ 0x2p-16384, false, true,
+ false,
+ 0x1.fffffffffffffffcp-16384, false, true,
+ 0x2p-16384, false, true,
+ 0x1.fffffffffffffffcp-16384, false, true,
+ 0x2p-16384, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0x1.fffffffffffffffffffffffffff8p-16384, false, true,
+ 0x1.fffffffffffffffffffffffffffcp-16384, false, true,
+ 0x1.fffffffffffffffffffffffffff8p-16384, false, true,
+ 0x1.fffffffffffffffffffffffffffcp-16384, false, true),
+ TEST ("0x0.7000004p-126",
+ false,
+ 0x1.cp-128, false, true,
+ 0x1.cp-128, false, true,
+ 0x1.cp-128, false, true,
+ 0x1.c00008p-128, false, true,
+ true,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ true,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ true,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ true,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ true,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false,
+ 0x1.c00001p-128, false, false),
+ TEST ("0x0.70000000000002p-1022",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x1.cp-1024, false, true,
+ 0x1.cp-1024, false, true,
+ 0x1.cp-1024, false, true,
+ 0x1.c000000000004p-1024, false, true,
+ true,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ true,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ false,
+ 0x1.cp-1024, false, true,
+ 0x1.cp-1024, false, true,
+ 0x1.cp-1024, false, true,
+ 0x1.c000000000004p-1024, false, true,
+ true,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false,
+ 0x1.c0000000000008p-1024, false, false),
+ TEST ("0x0.70000000000000004p-16382",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.c000000000000008p-16384, false, true,
+ false,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.c000000000000004p-16384, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ true,
+ 0x1.c000000000000001p-16384, false, false,
+ 0x1.c000000000000001p-16384, false, false,
+ 0x1.c000000000000001p-16384, false, false,
+ 0x1.c000000000000001p-16384, false, false),
+ TEST ("0x0.70000000000000004p-16383",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0xep-16388, false, true,
+ 0xep-16388, false, true,
+ 0xep-16388, false, true,
+ 0xe.000000000000008p-16388, false, true,
+ false,
+ 0xep-16388, false, true,
+ 0xep-16388, false, true,
+ 0xep-16388, false, true,
+ 0xe.000000000000004p-16388, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ true,
+ 0xe.0000000000000008p-16388, false, false,
+ 0xe.0000000000000008p-16388, false, false,
+ 0xe.0000000000000008p-16388, false, false,
+ 0xe.0000000000000008p-16388, false, false),
+ TEST ("0x0.70000000000000000000000000002p-16382",
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x8p-152, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.c000000000000008p-16384, false, true,
+ false,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.c000000000000004p-16384, false, true,
+ false,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x0p+0, false, true,
+ 0x4p-1076, false, true,
+ false,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.cp-16384, false, true,
+ 0x1.c000000000000000000000000004p-16384, false, true),
};
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