glibc/stdlib
Florian Weimer 12b4a1fc6e stdlib: Re-implement free (environ) compatibility kludge for setenv
For the originally failing application (userhelper from usermode),
it is not actually necessary to call realloc on the environ
pointer.  Yes, there will be a memory leak because the application
assigns a heap-allocated pointer to environ that it never frees,
but this leak was always there: the old realloc-based setenv had
a hidden internal variable, last_environ, that was used in a similar
way to __environ_array_list.  The application is not impacted by
the leak anyway because the relevant operations do not happen in
a loop.

The change here just uses a separte heap allocation and points
environ to that.  This means that if an application calls
free (environ) and restores the environ pointer to the value
at process start, and does not modify the environment further,
nothing bad happens.

This change should not invalidate any previous testing that went into
the original getenv thread safety change, commit 7a61e7f557
("stdlib: Make getenv thread-safe in more cases").

The new test cases are modeled in part on the env -i use case from
bug 32588 (with !DO_MALLOC && !DO_EARLY_SETENV), and the previous
stdlib/tst-setenv-malloc test.  The DO_MALLOC && !DO_EARLY_SETENV
case in the new test should approximate what userhelper from the
usermode package does.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2025-01-24 22:37:49 +01:00
..
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bug-fmtmsg1.c Fix locking problem in fmtmsg 2012-01-16 09:03:20 -05:00
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Makefile stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
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setenv.c stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
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tens_in_limb.c * stdlib/Makefile (aux): Add tens_in_limb. 2008-03-08 04:18:31 +00:00
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test-on_exit-race.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
testdiv.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
testdiv.input
testmb.c stdlib: Remove attr_write from mbstows if dst is NULL [BZ: 29265] 2022-06-22 11:12:33 -07:00
testmb2.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
testrand.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
testsort.c Update. 2000-12-05 08:17:58 +00:00
tst-abs.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-arc4random-fork.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-arc4random-stats.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-arc4random-thread.c Linux: Fixes for getrandom fork handling 2025-01-16 19:58:09 +01:00
tst-at_quick_exit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-atexit-common.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-atexit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-atof1.c * stdlib/strtod_l.c (____STRTOF_INTERNAL): Parse thousand 2006-12-11 21:43:56 +00:00
tst-atof2.c [BZ #3673] 2006-12-10 01:11:45 +00:00
tst-bsearch.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-bz20544.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-canon-bz26341.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-concurrent-exit-skeleton.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-concurrent-exit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-concurrent-quick_exit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-cxa_atexit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-empty-env.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-environ-change-1.c stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
tst-environ-change-2.c stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
tst-environ-change-3.c stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
tst-environ-change-4.c stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
tst-environ-change-skeleton.c stdlib: Re-implement free (environ) compatibility kludge for setenv 2025-01-24 22:37:49 +01:00
tst-environ.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-fmtmsg.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-fmtmsg.sh Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-getenv-signal.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-getenv-thread.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-getenv-unsetenv.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-getrandom-errno.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-getrandom.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-getrandom2.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-labs.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-limits.c Fix a couple of -Wundef warnings. 2014-12-29 23:14:38 -05:00
tst-llabs.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-makecontext-align.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-makecontext.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-makecontext2.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-makecontext3.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-on_exit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-putenv.c Update. 2005-01-04 07:48:13 +00:00
tst-putenvmod.c Update. 2005-01-04 07:48:13 +00:00
tst-qsort.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-qsort2.c stdlib/tst-qsort2.c: Fix off-by-one argc interpretation error 2014-06-20 21:29:33 +01:00
tst-qsort3.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-qsort4.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-qsort6.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-quick_exit.cc Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-rand-sequence.c stdlib: Test for expected sequence of random numbers from rand 2025-01-20 21:31:59 +01:00
tst-rand48-2.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-rand48.c stdlib: Fix tst-rand48.c printf types 2022-03-31 09:13:14 -03:00
tst-random-bz30584.c stdlib: random_r: fix unaligned access in initstate and initstate_r [BZ #30584] 2025-01-02 16:47:51 +00:00
tst-random.c Fix all the remaining misspellings -- BZ 25337 2023-06-02 01:39:48 +00:00
tst-random2.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
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 Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-secure-getenv.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext2.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext3.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext3.sh Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext4.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext5.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext6.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext7.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext8.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext9.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext10.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-setcontext11.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdbit-builtins.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdbit-Wconversion.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdbit.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_bit_ceil.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_bit_floor.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_bit_width.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_count_ones.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_count_zeros.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_first_leading_one.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_first_leading_zero.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_first_trailing_one.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_first_trailing_zero.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_has_single_bit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_leading_ones.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_leading_zeros.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_trailing_ones.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-stdc_trailing_zeros.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strfmon_l.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strfrom-locale.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strfrom.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strfrom.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-nan-locale-main.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-nan-locale.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-nan-sign-main.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-nan-sign.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-overflow.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -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 Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-round.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod-underflow.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod1i.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
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 Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod5i.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtod6.c Refactor strtod tests 2016-10-25 17:05:47 -02:00
tst-strtol-binary-c11.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol-binary-c23.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol-binary-gnu11.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol-binary-gnu23.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol-binary-main.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol-locale-main.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol-locale.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-strtol.c Convert 703 function definitions to prototype style. 2015-10-16 20:21:49 +00:00
tst-strtoll.c Convert 703 function definitions to prototype style. 2015-10-16 20:21:49 +00:00
tst-swapcontext1.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-swapcontext2.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-system.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-thread-quick_exit.cc Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-tininess.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-tls-atexit-lib.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-tls-atexit-nodelete.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-tls-atexit.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-unsetenv1.c * stdlib/Makefile (tests): Add tst-unsetenv1. 2008-12-02 02:27:43 +00:00
tst-width-stdint.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-width.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-xpg-basename.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
ucontext.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
udiv_qrnnd.c Moved to csu/errno-loc.c. 2005-12-14 15:06:39 +00:00
Versions Implement C23 <stdbit.h> 2024-01-03 12:07:14 +00:00
wcstombs.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
wctomb.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
xpg_basename.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00