Florian Weimer abe2bb2b47 elf: Support recursive use of dynamic TLS in interposed malloc ... It turns out that quite a few applications use bundled mallocs that have been built to use global-dynamic TLS (instead of the recommended initial-exec TLS). The previous workaround from commit afe42e935b ("elf: Avoid some free (NULL) calls in _dl_update_slotinfo") does not fix all encountered cases unfortunatelly. This change avoids the TLS generation update for recursive use of TLS from a malloc that was called during a TLS update. This is possible because an interposed malloc has a fixed module ID and TLS slot. (It cannot be unloaded.) If an initially-loaded module ID is encountered in __tls_get_addr and the dynamic linker is already in the middle of a TLS update, use the outdated DTV, thus avoiding another call into malloc. It's still necessary to update the DTV to the most recent generation, to get out of the slow path, which is why the check for recursion is needed. The bookkeeping is done using a global counter instead of per-thread flag because TLS access in the dynamic linker is tricky. All this will go away once the dynamic linker stops using malloc for TLS, likely as part of a change that pre-allocates all TLS during pthread_create/dlopen. Fixes commit d2123d6827 ("elf: Fix slow tls access after dlopen [BZ #19924]"). Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com> (cherry picked from commit 018f0fc3b8)		2025-01-10 19:57:39 -08:00
..
net	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
netinet	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
nfs	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
sys	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
_G_config.h
_itoa.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
a.out.h
abort-instr.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
adaptive_spin_count.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
aio_misc.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
allocalim.h
arch-fd_to_filename.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
asm-syntax.h
atomic-machine.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
c++-types.data
confstr.h
crti.S	Introduce <elf-initfini.h> and ELF_INITFINI for all architectures	2020-02-18 15:12:25 +01:00
crtn.S	Introduce <elf-initfini.h> and ELF_INITFINI for all architectures	2020-02-18 15:12:25 +01:00
device-nrs.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dirstream.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-audit-check.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-auxv.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-cache.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-call_tls_init_tp.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-debug.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-dtprocnum.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-dtv.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-execve.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-fcntl.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-fileid.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-fixup-attribute.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-fptr.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-hash.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-hwcap-check.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-irel.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-isa-level.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-lookupcfg.h	sparc: Fix la_symbind for bind-now (BZ 23734)	2023-07-12 22:31:27 +02:00
dl-machine-rel.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-machine.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-minimal-malloc.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-mman.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-new-hash.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-osinfo.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-procinfo.c
dl-procinfo.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-procruntime.c
dl-prop.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-protected.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-r_debug.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-relocate-ld.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-symbol-redir-ifunc.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-sysdep.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-tls.h
dl-unistd.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-vdso-setup.c
dl-vdso-setup.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dl-vdso.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dwarf2.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
elf_machine_sym_no_match.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
elf-initfini.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
elf-read-prop.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
elide.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
eloop-threshold.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
entry.h
errqueue.h
fast-jitter.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fd_to_filename.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
features-time64.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fenv_private.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fips-private.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fix-float-double-convert-nan.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fix-fp-int-compare-invalid.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fix-fp-int-convert-overflow.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fix-int-fp-convert-zero.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
float128-abi.h
fork.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
fpu_control.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
framestate.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
gcc-compat.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
gccframe.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
get-rounding-mode.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
gmp-mparam.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
hp-timing-common.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
hp-timing.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
ifreq.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
ifunc-init.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
ifunc-sel.h
internal-signals.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
intr-msg.h
ld.abilist
ldbl-classify-compat.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
ldconfig.h	elf: Restore ldconfig libc6 implicit soname logic [BZ #30125]	2023-02-20 11:54:45 -03:00
ldsodefs.h	elf: Support recursive use of dynamic TLS in interposed malloc	2025-01-10 19:57:39 -08:00
libanl.abilist
libBrokenLocale.abilist
libc_malloc_debug.abilist	Move malloc hooks into a compat DSO	2021-07-22 18:37:59 +05:30
libc_start_call_main.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-lock-arch.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-lock.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-mmap.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-mtag.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-start.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-symver.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-tsd.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc.abilist	linux: Add pidfd_getfd	2022-05-17 10:33:07 -03:00
libcrypt.abilist
libdl.abilist
libm-alias-double.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libm-alias-float128.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libm-alias-float.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libm-alias-ldouble.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libm-test-ulps
libm-test-ulps-name
libm.abilist
libnsl.abilist
libnss_compat.abilist
libnss_db.abilist
libnss_dns.abilist
libnss_files.abilist
libnss_hesiod.abilist
libnss_nis.abilist
libnss_nisplus.abilist
libpthread.abilist
libresolv.abilist
librt.abilist
libutil.abilist
link_map.h	Initial support for GNU_PROPERTY_1_NEEDED	2021-10-07 10:26:08 -07:00
linkmap.h
local-setxid.h
localplt.data	elf: Rework exception handling in the dynamic loader [BZ #25486]	2022-11-03 09:39:31 +01:00
machine-gmon.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
machine-lock.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
machine-sp.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
Makefile	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
malloc-alignment.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
malloc-hugepages.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
malloc-hugepages.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
malloc-machine.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
malloc-size.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
malloc-sysdep.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math_ldbl_opt.h
math_ldbl.h
math_private_calls.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math_private.h	math: Remove mpa files [BZ #15267]	2021-03-11 14:26:36 +00:00
math-barriers.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-nan-payload-double.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-nan-payload-float.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-narrow-alias-float128.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-narrow-alias.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-arch.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-exceptions.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-rounding.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-snan-cast.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-snan-payload.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-snan.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-trap-force.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests-trap.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-tests.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-type-macros-double.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-type-macros-float128.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-type-macros-float.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-type-macros-ldouble.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-type-macros.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
math-use-builtins-ceil.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-copysign.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-fabs.h	math: Add math-use-builtins-fabs (BZ#29027)	2022-05-23 17:49:18 -03:00
math-use-builtins-floor.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-fma.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-fmax.h	math: Add math-use-builtinds-fmax.h	2021-12-13 09:08:07 -03:00
math-use-builtins-fmin.h	math: Add math-use-builtinds-fmin.h	2021-12-13 10:08:43 -03:00
math-use-builtins-llrint.h	Use GCC builtins for llrint functions if desired.	2022-11-29 16:00:28 +08:00
math-use-builtins-logb.h	Use GCC builtins for logb functions if desired.	2022-11-29 16:00:28 +08:00
math-use-builtins-lrint.h	Use GCC builtins for lrint functions if desired.	2022-11-29 16:00:28 +08:00
math-use-builtins-nearbyint.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-rint.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-round.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-roundeven.h	Use GCC builtins for roundeven functions if desired.	2021-06-27 07:56:57 -07:00
math-use-builtins-sqrt.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins-trunc.h	math: Decompose math-use-builtins.h	2020-06-22 11:09:45 -03:00
math-use-builtins.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
memcopy.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
mmap_info.h
mremap-failure.h	Add mremap tests	2024-08-01 17:00:54 +02:00
nan-high-order-bit.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
not-cancel.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
not-errno.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
nscd-types.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
pagecopy.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
paths.h
pointer_guard.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
profil-counter.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
pty-private.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
rtld_static_init.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
rtld-lowlevel.h
safe-fatal.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
set-hooks-arch.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
setjmpP.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
sigcontextinfo.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
siglist-compat-def.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
siglist.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
sigset-cvt-mask.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
sigsetops.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
single-thread.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
spawn_int_def.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
stackguard-macros.h
stackinfo.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
stap-probe-machine.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
startup.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
stdio-lock.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
string_private.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
struct_stat_time64.h	linux: Add {f}stat{at} y2038 support	2020-10-09 17:02:07 -03:00
symbol-hacks.h	Disable symbol hack in libc_nonshared.a	2021-09-27 07:46:25 -07:00
sysdep-cancel.h
sysdep.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
thread_state.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
time64-compat.h	y2038: Add support for 64-bit time on legacy ABIs	2021-06-15 10:42:11 -03:00
time-clockid.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tininess.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tls-internal-struct.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tls-internal.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tls-internal.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tls-setup.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tls.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tst-audit.h
tst-file-align.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
tst-stack-align.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unsecvars.h	elf: Remove LD_USE_LOAD_BIAS	2022-02-10 09:18:15 -03:00
unwind-arch.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-dw2-fde-glibc.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-dw2-fde.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-dw2-fde.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-dw2.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-link.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-pe.c
unwind-pe.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-resume.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind-resume.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
unwind.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
utmp-equal.h	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
utmp-size.h	login: Check default sizes of structs utmp, utmpx, lastlog	2024-05-02 17:48:45 +02:00
xstatver.h	Remove mknod wrapper functions, move them to symbols	2020-10-09 17:02:06 -03:00