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Subject: [Bug 221337] -fsanitize=address (asan) fails on i386
Date: Wed, 16 Aug 2017 10:37:37 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D221337

--- Comment #2 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Dimitry Andric from comment #1)
Module tls is allocated in rtld.c:allocate_module_tls().  We use the reques=
ted
alignment of the TLS initialization segment as the guaranteed alignment val=
ue.

There are several possibilities how something might not get aligned:
1. The segment has inappropriate alignment requirement, check with readelf.
2. The symbol inside the TLS segment is unaligned, so the segment alignment
does not help.  Again, check with readelf.
3. The allocate_module_tls() is buggy. Probably check this last, by inserti=
ng
rtld_printf() into rtld code.

I would bet that the cause is either 1 or 2, esp. because this sounds like a
deja vu, isn't it ?

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