Adhemerval Zanella d40ac01cbb stdlib: Make abort/_Exit AS-safe (BZ 26275) ...

The recursive lock used on abort does not synchronize with a new process
creation (either by fork-like interfaces or posix_spawn ones), nor it
is reinitialized after fork().

Also, the SIGABRT unblock before raise() shows another race condition,
where a fork or posix_spawn() call by another thread, just after the
recursive lock release and before the SIGABRT signal, might create
programs with a non-expected signal mask.  With the default option
(without POSIX_SPAWN_SETSIGDEF), the process can see SIG_DFL for
SIGABRT, where it should be SIG_IGN.

To fix the AS-safe, raise() does not change the process signal mask,
and an AS-safe lock is used if a SIGABRT is installed or the process
is blocked or ignored.  With the signal mask change removal,
there is no need to use a recursive loc.  The lock is also taken on
both _Fork() and posix_spawn(), to avoid the spawn process to see the
abort handler as SIG_DFL.

A read-write lock is used to avoid serialize _Fork and posix_spawn
execution.  Both sigaction (SIGABRT) and abort() requires to lock
as writer (since both change the disposition).

The fallback is also simplified: there is no need to use a loop of
ABORT_INSTRUCTION after _exit() (if the syscall does not terminate the
process, the system is broken).

The proposed fix changes how setjmp works on a SIGABRT handler, where
glibc does not save the signal mask.  So usage like the below will now
always abort.

  static volatile int chk_fail_ok;
  static jmp_buf chk_fail_buf;

  static void
  handler (int sig)
  {
    if (chk_fail_ok)
      {
        chk_fail_ok = 0;
        longjmp (chk_fail_buf, 1);
      }
    else
      _exit (127);
  }
  [...]
  signal (SIGABRT, handler);
  [....]
  chk_fail_ok = 1;
  if (! setjmp (chk_fail_buf))
    {
      // Something that can calls abort, like a failed fortify function.
      chk_fail_ok = 0;
      printf ("FAIL\n");
    }

Such cases will need to use sigsetjmp instead.

The _dl_start_profile calls sigaction through _profil, and to avoid
pulling abort() on loader the call is replaced with __libc_sigaction.

Checked on x86_64-linux-gnu and aarch64-linux-gnu.

Reviewed-by: DJ Delorie <dj@redhat.com>

2024-10-08 14:40:12 -03:00

..

bits

Fix name space violation in fortify wrappers (bug 32052)

2024-08-05 16:49:58 +02:00

sys

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2024-01-01 10:53:40 -08:00

a64l.c

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abort.c

stdlib: Make abort/_Exit AS-safe (BZ 26275)

2024-10-08 14:40:12 -03:00

abs.c

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add_n.c

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addmul_1.c

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alloca.h

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arc4random_uniform.c

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arc4random.c

stdlib: fix arc4random fallback to /dev/urandom (BZ 31612)

2024-07-08 10:05:10 -03:00

at_quick_exit.c

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atexit.c

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atof.c

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atoi.c

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atol.c

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atoll.c

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bsearch.c

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bug-fmtmsg1.c

…

bug-getcontext.c

Simplify tilegx sysdeps folder

2017-12-20 16:55:26 -02:00

bug-strtod2.c

…

bug-strtod.c

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canonicalize.c

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cmp.c

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cxa_at_quick_exit.c

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cxa_atexit.c

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cxa_finalize.c

stdlib: Describe __cxa_finalize usage in function comment

2024-06-03 19:04:58 +02:00

cxa_thread_atexit_impl.c

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dbl2mpn.c

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Depend

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div.c

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divmod_1.c

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divrem.c

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drand48_r.c

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drand48-iter.c

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drand48.c

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erand48_r.c

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erand48.c

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errno.h

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exit.c

stdlib: Allow concurrent quick_exit (BZ 31997)

2024-08-05 17:07:57 -03:00

exit.h

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fmtmsg.c

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fmtmsg.h

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fpioconst.c

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fpioconst.h

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gen-fpioconst.c

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gen-tst-strtod-round.c

More thoroughly test underflow / errno in tst-strtod-round

2024-08-27 12:38:01 +00:00

getcontext.c

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getentropy.c

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getenv.c

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getrandom.c

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getsubopt.c

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gmp-impl.h

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gmp.h

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grouping.c

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grouping.h

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groupingwc.c

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inlines.c

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inttypes.h

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isomac.c

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jrand48_r.c

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jrand48.c

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l64a.c

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labs.c

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lcong48_r.c

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lcong48.c

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ldbl2mpn.c

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ldiv.c

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llabs.c

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lldiv.c

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longlong.h

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lrand48_r.c

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lrand48.c

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lshift.c

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makecontext.c

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Makefile

stdlib: Link tst-concurrent-quick_exit with $(shared-thread-library)

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mblen.c

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mbstowcs.c

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mbtowc.c

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mod_1.c

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monetary.h

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mp_clz_tab.c

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mpn2dbl.c

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mpn2flt.c

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mpn2ldbl.c

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mrand48_r.c

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mrand48.c

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mul_1.c

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mul_n.c

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mul.c

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nrand48_r.c

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nrand48.c

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old_atexit.c

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on_exit.c

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putenv.c

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qsort.c

qsort: Fix a typo causing unnecessary malloc/free (BZ 31276)

2024-01-23 05:17:31 -08:00

quick_exit.c

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rand_r.c

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rand.c

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random_r.c

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random.c

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rpmatch.c

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rshift.c

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secure-getenv.c

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seed48_r.c

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seed48.c

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setcontext.c

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setenv.c

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srand48_r.c

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srand48.c

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stdbit.h

Use gcc __builtin_stdc_* builtins in stdbit.h if possible

2024-01-31 19:17:27 +01:00

stdc_bit_ceil_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_ceil_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_ceil_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_ceil_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_ceil_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_floor_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_floor_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_floor_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_floor_ull.c

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2024-01-03 12:07:14 +00:00

stdc_bit_floor_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_width_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_width_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_width_ul.c

Implement C23 <stdbit.h>

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stdc_bit_width_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_bit_width_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_ones_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_ones_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_ones_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_ones_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_ones_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_zeros_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_zeros_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_zeros_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_zeros_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_count_zeros_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_one_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_one_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_one_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_one_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_one_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_zero_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_zero_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_zero_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_zero_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_leading_zero_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_one_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_one_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_one_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_one_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_one_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_zero_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_zero_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_zero_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_zero_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_first_trailing_zero_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_has_single_bit_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_has_single_bit_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_has_single_bit_ul.c

Implement C23 <stdbit.h>

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stdc_has_single_bit_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_has_single_bit_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_ones_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_ones_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_ones_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_ones_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_ones_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_zeros_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_zeros_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_zeros_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_zeros_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_leading_zeros_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_ones_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_ones_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_ones_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_ones_ull.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_ones_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_zeros_uc.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_zeros_ui.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_zeros_ul.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdc_trailing_zeros_ull.c

Implement C23 <stdbit.h>

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stdc_trailing_zeros_us.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

stdint.h

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

stdlib.h

stdlib: Mark abort as cold

2024-07-31 14:26:00 +08:00

strfmon_l.c

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strfmon.c

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strfrom-skeleton.c

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strfromd.c

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strfromf.c

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strfroml.c

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strtod_l.c

Fix strtod subnormal rounding (bug 30220)

2024-08-27 12:41:02 +00:00

strtod_nan_main.c

Do not set errno for overflowing NaN payload in strtod/nan (bug 32045)

2024-09-04 13:21:23 +00:00

strtod_nan_narrow.h

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strtod_nan_wide.h

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strtod_nan.c

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strtod.c

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strtof_l.c

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strtof_nan.c

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strtof.c

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strtol_l.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

strtol.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

strtold_l.c

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strtold_nan.c

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2024-01-01 10:53:40 -08:00

strtold.c

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2024-01-01 10:53:40 -08:00

strtoll_l.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

strtoll.c

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2024-01-01 10:53:40 -08:00

strtoul_l.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

strtoul.c

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2024-01-01 10:53:40 -08:00

strtoull_l.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

strtoull.c

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sub_n.c

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submul_1.c

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swapcontext.c

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system.c

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tens_in_limb.c

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test-a64l.c

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test-at_quick_exit-race.c

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test-atexit-race-common.c

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test-atexit-race.c

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test-atexit-recursive.c

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test-bz22786.c

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test-canon2.c

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test-canon.c

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2024-01-01 10:53:40 -08:00

test-cxa_atexit-race2.c

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test-cxa_atexit-race.c

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test-dlclose-exit-race-helper.c

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test-dlclose-exit-race.c

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test-on_exit-race.c

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testdiv.c

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2024-01-01 10:53:40 -08:00

testdiv.input

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testmb2.c

Remove "Contributed by" lines

2021-09-03 22:06:44 +05:30

testmb.c

stdlib: Remove attr_write from mbstows if dst is NULL [BZ: 29265]

2022-06-22 11:12:33 -07:00

testrand.c

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2024-01-01 10:53:40 -08:00

testsort.c

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tst-abs.c

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tst-arc4random-fork.c

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tst-arc4random-stats.c

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tst-arc4random-thread.c

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tst-at_quick_exit.c

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tst-atexit-common.c

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tst-atexit.c

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tst-atof1.c

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tst-atof2.c

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tst-bsearch.c

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tst-bz20544.c

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tst-canon-bz26341.c

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2024-01-01 10:53:40 -08:00

tst-concurrent-exit-skeleton.c

stdlib: Allow concurrent quick_exit (BZ 31997)

2024-08-05 17:07:57 -03:00

tst-concurrent-exit.c

stdlib: Allow concurrent quick_exit (BZ 31997)

2024-08-05 17:07:57 -03:00

tst-concurrent-quick_exit.c

stdlib: Allow concurrent quick_exit (BZ 31997)

2024-08-05 17:07:57 -03:00

tst-cxa_atexit.c

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tst-empty-env.c

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tst-environ.c

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tst-fmtmsg.c

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tst-fmtmsg.sh

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tst-getrandom.c

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tst-labs.c

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tst-limits.c

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tst-llabs.c

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tst-makecontext2.c

stdlib: Fix tst-makecontext2 log when swapcontext fails

2024-03-23 08:36:28 +00:00

tst-makecontext3.c

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tst-makecontext-align.c

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tst-makecontext.c

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tst-on_exit.c

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tst-putenv.c

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tst-putenvmod.c

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tst-qsort2.c

…

tst-qsort3.c

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2024-01-01 10:53:40 -08:00

tst-qsort4.c

stdlib: Verify heapsort for two-element cases

2024-01-16 11:00:51 -03:00

tst-qsort6.c

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2024-01-01 10:53:40 -08:00

tst-qsort.c

Remove "Contributed by" lines

2021-09-03 22:06:44 +05:30

tst-quick_exit.cc

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2024-01-01 10:53:40 -08:00

tst-rand48-2.c

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tst-rand48.c

stdlib: Fix tst-rand48.c printf types

2022-03-31 09:13:14 -03:00

tst-random2.c

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2024-01-01 10:53:40 -08:00

tst-random.c

Fix all the remaining misspellings -- BZ 25337

2023-06-02 01:39:48 +00:00

tst-realpath-toolong.c

tst-realpath-toolong: return "unsupported" when PATH_MAX is undefined

2023-08-03 22:43:27 +02:00

tst-realpath.c

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2024-01-01 10:53:40 -08:00

tst-secure-getenv.c

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tst-setcontext2.c

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tst-setcontext3.c

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tst-setcontext3.sh

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tst-setcontext4.c

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tst-setcontext5.c

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tst-setcontext6.c

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tst-setcontext7.c

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tst-setcontext8.c

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tst-setcontext9.c

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tst-setcontext10.c

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tst-setcontext11.c

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tst-setcontext.c

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2024-01-01 10:53:40 -08:00

tst-stdbit-builtins.c

Use gcc __builtin_stdc_* builtins in stdbit.h if possible

2024-01-31 19:17:27 +01:00

tst-stdbit-Wconversion.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdbit.h

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_bit_ceil.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_bit_floor.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_bit_width.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_count_ones.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_count_zeros.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_first_leading_one.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_first_leading_zero.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_first_trailing_one.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_first_trailing_zero.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_has_single_bit.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_leading_ones.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_leading_zeros.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_trailing_ones.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-stdc_trailing_zeros.c

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

tst-strfmon_l.c

localedata: hr_HR: change currency to EUR/€

2024-02-08 08:13:37 +01:00

tst-strfrom-locale.c

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2024-01-01 10:53:40 -08:00

tst-strfrom.c

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2024-01-01 10:53:40 -08:00

tst-strfrom.h

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2024-01-01 10:53:40 -08:00

tst-strtod1i.c

Make __strtod_internal tests type-generic

2024-08-27 20:41:54 +00:00

tst-strtod2.c

Add tests of more strtod special cases

2024-09-20 23:24:45 +00:00

tst-strtod3.c

Make __strtod_internal tests type-generic

2024-08-27 20:41:54 +00:00

tst-strtod4.c

Make __strtod_internal tests type-generic

2024-08-27 20:41:54 +00:00

tst-strtod5.c

Make tst-strtod2 and tst-strtod5 type-generic

2024-09-20 23:23:13 +00:00

tst-strtod5i.c

Make __strtod_internal tests type-generic

2024-08-27 20:41:54 +00:00

tst-strtod6.c

…

tst-strtod-nan-locale-main.c

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tst-strtod-nan-locale.c

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tst-strtod-nan-sign-main.c

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2024-01-01 10:53:40 -08:00

tst-strtod-nan-sign.c

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2024-01-01 10:53:40 -08:00

tst-strtod-overflow.c

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2024-01-01 10:53:40 -08:00

tst-strtod-round-data

Fix strtod subnormal rounding (bug 30220)

2024-08-27 12:41:02 +00:00

tst-strtod-round-data.h

Fix strtod subnormal rounding (bug 30220)

2024-08-27 12:41:02 +00:00

tst-strtod-round-skeleton.c

More thoroughly test underflow / errno in tst-strtod-round

2024-08-27 12:38:01 +00:00

tst-strtod-round.c

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2024-01-01 10:53:40 -08:00

tst-strtod-underflow.c

Make tst-strtod-underflow type-generic

2024-09-20 23:25:32 +00:00

tst-strtod.c

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2024-01-01 10:53:40 -08:00

tst-strtod.h

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2024-01-01 10:53:40 -08:00

tst-strtol-binary-c11.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

tst-strtol-binary-c23.c

Rename c2x / gnu2x tests to c23 / gnu23

2024-02-01 17:55:57 +00:00

tst-strtol-binary-gnu11.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

tst-strtol-binary-gnu23.c

Rename c2x / gnu2x tests to c23 / gnu23

2024-02-01 17:55:57 +00:00

tst-strtol-binary-main.c

Refer to C23 in place of C2X in glibc

2024-02-01 11:02:01 +00:00

tst-strtol-locale-main.c

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2024-01-01 10:53:40 -08:00

tst-strtol-locale.c

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2024-01-01 10:53:40 -08:00

tst-strtol.c

…

tst-strtoll.c

…

tst-swapcontext1.c

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2024-01-01 10:53:40 -08:00

tst-swapcontext2.c

Fix usage of _STACK_GROWS_DOWN and _STACK_GROWS_UP defines [BZ 31989]

2024-07-19 10:10:17 -04:00

tst-system.c

support: Use macros for *stat wrappers

2024-08-16 16:05:20 +02:00

tst-thread-quick_exit.cc

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2024-01-01 10:53:40 -08:00

tst-tininess.c

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2024-01-01 10:53:40 -08:00

tst-tls-atexit-lib.c

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2024-01-01 10:53:40 -08:00

tst-tls-atexit-nodelete.c

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2024-01-01 10:53:40 -08:00

tst-tls-atexit.c

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2024-01-01 10:53:40 -08:00

tst-unsetenv1.c

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tst-width-stdint.c

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2024-01-01 10:53:40 -08:00

tst-width.c

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2024-01-01 10:53:40 -08:00

tst-xpg-basename.c

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2024-01-01 10:53:40 -08:00

ucontext.h

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2024-01-01 10:53:40 -08:00

udiv_qrnnd.c

…

Versions

Implement C23 <stdbit.h>

2024-01-03 12:07:14 +00:00

wcstombs.c

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2024-01-01 10:53:40 -08:00

wctomb.c

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2024-01-01 10:53:40 -08:00

xpg_basename.c

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2024-01-01 10:53:40 -08:00