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From: "paulo.cesar.pereira.de.andrade at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/17645] RFE: Improve performance of dynamic loader for deeply nested DSO dependencies.
Date: Tue, 25 Nov 2014 14:10:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=17645

--- Comment #2 from Paulo Andrade <paulo.cesar.pereira.de.andrade at gmail dot com> ---
The change to elf/Makefile is to make the test case have
only one valid result.

The expected result is:

start_a1
start_a2
start_b1
start_b2
start_a3
start_a4
main
finish_a4
finish_a3
finish_b2
finish_b1
finish_a2
finish_a1

but "a1" and "b1" do not have any dependencies, and
without the elf/Makefile patch it would result in:

start_a1
start_b1
start_a2
start_b2
start_a3
start_a4
main
finish_a4
finish_a3
finish_b2
finish_b1
finish_a2
finish_a1

The "input" of that test case, wihtout the patch is:

[0] = ""        ()
[1] = a4        (a4 a3 libc.so)
[2] = a1        (a1 libc.so)
[3] = b2        (b2 b1 a2 libc.so)
[4] = libc.so        (libc.so ld.so)
[5] = a3        (a3 b2 b1 libc.so)
[6] = b1        (b1 libc.so)
[7] = a2        (a2 a1 libc.so)
[8] = ld.so        ()

where items in () are the dependencies of an object,
and [] is the input order.

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