Re: [uclibc-ng-devel] [PATCH] Fix _dl_deallocate_tls in !SHARED case

This patch seems needed in builds where - SHARED is not defined (no shared lib support) - and USE_TLS is set Without this patch, static_dtv is free'ed. See the following backtrace: This backtrace is obtained while debugging tst-basic3 from the uclibc-ng nptl testsuite. It aborts because of the assert in malloc: https://elixir.bootlin.com/uclibc-ng/v1.0.31/source/libc/stdlib/malloc-stan… Signed-off-by: Yann Sionneau <ysionneau(a)kalray.eu> --- libpthread/nptl/sysdeps/generic/dl-tls.c | 5 +++++ libpthread/nptl/sysdeps/generic/libc-tls.c | 5 ++++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/libpthread/nptl/sysdeps/generic/dl-tls.c b/libpthread/nptl/sysdeps/generic/dl-tls.c index 989e587a2..7d25e4706 100644 --- a/libpthread/nptl/sysdeps/generic/dl-tls.c +++ b/libpthread/nptl/sysdeps/generic/dl-tls.c @@ -48,6 +48,9 @@ /* Value used for dtv entries for which the allocation is delayed. */ # define TLS_DTV_UNALLOCATED ((void *) -1l) +#ifndef SHARED +extern dtv_t static_dtv; +#endif /* Out-of-memory handler. */ # ifdef SHARED @@ -584,6 +587,8 @@ _dl_deallocate_tls (void *tcb, bool dealloc_tcb) /* The array starts with dtv[-1]. */ #ifdef SHARED if (dtv != GL(dl_initial_dtv)) +#else + if ((dtv - 1) != &static_dtv) #endif free (dtv - 1); diff --git a/libpthread/nptl/sysdeps/generic/libc-tls.c b/libpthread/nptl/sysdeps/generic/libc-tls.c index a6df4cdc4..d746c9a38 100644 --- a/libpthread/nptl/sysdeps/generic/libc-tls.c +++ b/libpthread/nptl/sysdeps/generic/libc-tls.c @@ -42,7 +42,10 @@ extern size_t _dl_phnum; extern int __tdata_start; #endif -static dtv_t static_dtv[2 + TLS_SLOTINFO_SURPLUS]; +#ifdef SHARED +static +#endif +dtv_t static_dtv[2 + TLS_SLOTINFO_SURPLUS]; static struct