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Use libnss_files.so for tests posix/bug-ga2 and resolv/tst-leaks2 [BZ #26821]

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The tests posix/bug-ga2-mem and resolv/mtrace-tst-leaks2 are failing on
fedora 33 as mtrace reports memory leaks.

The /etc/nsswitch.conf differs between
Fedora 32: hosts:      files dns myhostname
Fedora 33: hosts:      files resolve [!UNAVAIL=return] myhostname dns

Therefore /lib64/libnss_resolve.so.2 (from systemd) and the dependencies
libgcc_s.so.1 and libpthread.so.0 are loaded.

Usually all malloc'ed resources from getaddrinfo / gethostbyname are freed
and the libraries are dlclose'd in nss/nsswitch.c:libc_freeres_fn (free_mem).
Unfortunately, /lib64/libnss_resolve.so.2 is marked with DF_1_NODELETE.
As this library is not unmapped, you'll see "Memory not freed".

Therefore those tests are now only relying on libnss_files.so by making
them test-container tests and providing the required configuration files.

By moving the tests to tests-container, those are now running with
"make check".  Therefore the mtrace part of the tests are also moved
from "make xcheck" to "make check".

bug-ga2.c is now using test-driver.c in order to support WAIT_FOR_DEBUGGER
environment variable.
This commit is contained in:
Stefan Liebler
2020-11-23 10:51:24 +01:00
parent 76ea70c613
commit 29fddfc7df
9 changed files with 23 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
resolv/Makefile
View File

@ -32,7 +32,7 @@ routines := herror inet_addr inet_ntop inet_pton nsap_addr res_init \
resolv_context resolv_conf
tests = tst-aton tst-leaks tst-inet_ntop
xtests = tst-leaks2
tests-container = tst-leaks2
tests-internal += tst-inet_aton_exact
@ -125,9 +125,8 @@ endif
ifeq ($(run-built-tests),yes)
ifneq (no,$(PERL))
tests-special += $(objpfx)mtrace-tst-leaks.out
xtests-special += $(objpfx)mtrace-tst-leaks2.out
tests-special += $(objpfx)mtrace-tst-resolv-res_ninit.out
tests-special += $(objpfx)mtrace-tst-leaks.out $(objpfx)mtrace-tst-leaks2.out \
$(objpfx)mtrace-tst-resolv-res_ninit.out
endif
endif

6
resolv/tst-leaks2.c
View File

@ -21,6 +21,7 @@
#include <mcheck.h>
#include <netdb.h>
#include <resolv.h>
#include <support/check.h>
static int
do_test (void)
@ -28,8 +29,9 @@ do_test (void)
mtrace ();
for (int i = 0; i < 20; ++i)
{
res_init ();
gethostbyname ("www.gnu.org");
TEST_VERIFY_EXIT (res_init () == 0);
if (gethostbyname ("www.gnu.org") == NULL)
FAIL_EXIT1 ("%s\n", hstrerror (h_errno));
}
return 0;
}

1
resolv/tst-leaks2.root/etc/hosts Normal file
View File

@ -0,0 +1 @@
192.0.2.1 www.gnu.org

1
resolv/tst-leaks2.root/etc/nsswitch.conf Normal file
View File

@ -0,0 +1 @@
hosts: files