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From: "nsz at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug malloc/27237] deadlock in malloc/tst-malloc-stats-cancellation
Date: Wed, 27 Jan 2021 09:41:47 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27237

--- Comment #7 from Szabolcs Nagy <nsz at gcc dot gnu.org> ---
_IO_stdin_used is defined in csu/init.c which is built as

gcc init.c -c -std=3Dgnu11 -fgnu89-inline  -O2 [...] -D_LIBC_REENTRANT -inc=
lude
/work/build/libc-modules.h -DMODULE_NAME=3Dlibc -include
../include/libc-symbols.h  -DPIC     -DTOP_NAMESPACE=3Dglibc -o
/work/build/csu/init.o [...]

i think it should have -DLIBC_NONSHARED=3D1 since crt files end up in dynam=
ic
linked binaries, so that's the actual bug.

on new targets _IO_stdin_used is unused (it's for bw compat with < glibc 2.=
1).

and the reason i could not reproduce this on i386 is that my gcc is multi
arch and then NO_HIDDEN_EXTERN_FUNC_IN_PIE is set, so the visibility pragma
is not present.

--=20
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