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From: "mail at milianw dot de" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug dynamic-link/28248] is there a way to LD_PRELOAD library before
 other dynamic libraries?
Date: Thu, 09 Sep 2021 08:35:34 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28248

--- Comment #4 from Milian Wolff <mail at milianw dot de> ---
Thank you, I'll try out that linker flag and report back.

> So this is about destructors?

Yes, indeed. As a heap profiler and leak checker, I would like to call
`__libc_freeres` to silence leaks, similar to how valgrind does it. And I n=
eed
do that before any other library gets unloaded, as those could potentially =
try
to dlclose plugins loaded at runtime (this is what QtCore does). Doing that
after `__libc_freeres` would lead to crashes. So here I'm looking for ways =
of
preventing said crash.

> glibc currently does not guarantee that destructors run in the opposite o=
rder of constructors

Hm that sounds unfortunate. But if you say: "don't guarantee" - does it do =
it
normally, and there are just some corner cases where it wouldn't happen? As
long as it would help with the common case I'm running into (see above), it
would help me.

Cheers

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