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linux: Add a getauxval test [BZ #23293]

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This is for bug 23293 and it relies on the glibc test system running
tests via explicit ld.so invokation by default.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

---
v4:
- New patch.
This commit is contained in:
Szabolcs Nagy 2022-05-03 13:18:04 +01:00
parent 8db827d67c
commit 3f32aa2bdd
2 changed files with 75 additions and 0 deletions
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1
sysdeps/unix/sysv/linux/Makefile
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@ -126,6 +126,7 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
tst-prctl \
tst-scm_rights \
tst-epoll \
tst-getauxval \
# tests
# For +depfiles in Makerules.

74
sysdeps/unix/sysv/linux/tst-getauxval.c Normal file
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@ -0,0 +1,74 @@
/* Basic test for getauxval.
Copyright (C) 2022 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/>. */
#include <unistd.h>
#include <stdio.h>
#include <support/check.h>
#include <sys/auxv.h>
static int missing;
static int mismatch;
static void
check_nonzero (unsigned long t, const char *s)
{
unsigned long v = getauxval (t);
printf ("%s: %lu (0x%lx)\n", s, v, v);
if (v == 0)
missing++;
}
static void
check_eq (unsigned long t, const char *s, unsigned long want)
{
unsigned long v = getauxval (t);
printf ("%s: %lu want: %lu\n", s, v, want);
if (v != want)
mismatch++;
}
#define NZ(x) check_nonzero (x, #x)
#define EQ(x, want) check_eq (x, #x, want)
static int
do_test (void)
{
/* These auxv entries should be non-zero on Linux. */
NZ (AT_PHDR);
NZ (AT_PHENT);
NZ (AT_PHNUM);
NZ (AT_PAGESZ);
NZ (AT_ENTRY);
NZ (AT_CLKTCK);
NZ (AT_RANDOM);
NZ (AT_EXECFN);
if (missing)
FAIL_EXIT1 ("Found %d missing auxv entries.\n", missing);
/* Check against syscalls. */
EQ (AT_UID, getuid ());
EQ (AT_EUID, geteuid ());
EQ (AT_GID, getgid ());
EQ (AT_EGID, getegid ());
if (mismatch)
FAIL_EXIT1 ("Found %d mismatching auxv entries.\n", mismatch);
return 0;
}
#include <support/test-driver.c>