mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/* Test for IFUNC handling with local definitions.
|
|
Copyright (C) 2019-2020 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 is based on gcc.dg/attr-ifunc-4.c. */
|
|
|
|
#include <config.h>
|
|
|
|
#ifdef HAVE_GCC_IFUNC
|
|
|
|
# include <stdbool.h>
|
|
# include <stdio.h>
|
|
|
|
/* Do not use the test framework, so that the process setup is not
|
|
disturbed. */
|
|
|
|
static volatile int implementation_called;
|
|
static volatile int resolver_called;
|
|
|
|
/* Just a random constant, to check that we called the right
|
|
function. */
|
|
enum { random_constant = 0x3a88d66d };
|
|
|
|
static int
|
|
implementation (void)
|
|
{
|
|
++implementation_called;
|
|
return random_constant;
|
|
}
|
|
|
|
static __typeof__ (implementation) *
|
|
resolver (void)
|
|
{
|
|
++resolver_called;
|
|
return implementation;
|
|
}
|
|
|
|
static int magic (void) __attribute__ ((ifunc ("resolver")));
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
bool errors = false;
|
|
|
|
if (implementation_called != 0)
|
|
{
|
|
printf ("error: initial value of implementation_called is not zero:"
|
|
" %d\n", implementation_called);
|
|
errors = true;
|
|
}
|
|
|
|
/* This can be zero if the reference is bound lazily. */
|
|
printf ("info: initial value of resolver_called: %d\n", resolver_called);
|
|
|
|
int magic_value = magic ();
|
|
if (magic_value != random_constant)
|
|
{
|
|
printf ("error: invalid magic value: 0x%x\n", magic_value);
|
|
errors = true;
|
|
}
|
|
|
|
printf ("info: resolver_called value: %d\n", resolver_called);
|
|
if (resolver_called == 0)
|
|
{
|
|
/* In theory, the resolver could be called multiple times if
|
|
several relocations are needed. */
|
|
puts ("error: invalid resolver_called value (must not be zero)");
|
|
errors = true;
|
|
}
|
|
|
|
printf ("info: implementation_called value: %d\n", implementation_called);
|
|
if (implementation_called != 1)
|
|
{
|
|
puts ("error: invalid implementation_called value (must be 1)");
|
|
errors = true;
|
|
}
|
|
|
|
return errors;
|
|
}
|
|
|
|
#else /* !HAVE_GCC_IFUNC */
|
|
|
|
# include <support/check.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
FAIL_UNSUPPORTED ("GCC does not support the ifunc attribute");
|
|
return 1; /* Not reachable. */
|
|
}
|
|
|
|
# include <support/test-driver.c>
|
|
#endif
|