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glibc/elf/tst-dlopen-constructor-null.c
Florian Weimer d604f9c500 elf: Test dlopen (NULL, RTLD_LAZY) from an ELF constructor
This call must not complete initialization of all shared objects
in the global scope because the ELF constructor which makes the call
likely has not finished initialization.  Calling more constructors
at this point would expose those to a partially constructed
dependency.

This completes the revert of commit 9897ced8e78db5d813166a7ccccfd5a
("elf: Run constructors on cyclic recursive dlopen (bug 31986)").
2025-03-11 15:30:52 +01:00

39 lines
1.3 KiB
C

/* Verify that dlopen (NULL, RTLD_LAZY) does not complete initialization.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* This test mimics what the glvndSetupPthreads function in libglvnd
does. */
#include <stdlib.h>
#include <support/check.h>
/* Defined and initialized in the shared objects. */
extern int mod1_status;
extern int mod2_status;
static int
do_test (void)
{
TEST_COMPARE (mod1_status, 1);
TEST_COMPARE (mod2_status, 1);
TEST_COMPARE_STRING (getenv ("mod2_status"), "constructed");
return 0;
}
#include <support/test-driver.c>