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03f42a56eb
Enabling --enable-stack-protector=all causes the following tests to fail:
FAIL: elf/ifuncmain9picstatic
FAIL: elf/ifuncmain9static
Nick Alcock (who committed the stack protector code) marked the IFUNC
resolvers with inhibit_stack_protector when he done the original work and
suggested doing so again @ BZ #25680. This patch adds
inhibit_stack_protector to ifuncmain9.
After patch is applied, --enable-stack-protector=all does not fail the
above tests.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/* Test for IFUNC handling with local definitions.
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Copyright (C) 2019-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This test is based on gcc.dg/attr-ifunc-4.c. */
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#include <config.h>
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#ifdef HAVE_GCC_IFUNC
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# include <stdbool.h>
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# include <stdio.h>
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/* Do not use the test framework, so that the process setup is not
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disturbed. */
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static volatile int implementation_called;
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static volatile int resolver_called;
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/* Just a random constant, to check that we called the right
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function. */
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enum { random_constant = 0x3a88d66d };
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static int
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implementation (void)
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{
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++implementation_called;
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return random_constant;
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}
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static __typeof__ (implementation) *
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inhibit_stack_protector
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resolver (void)
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{
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++resolver_called;
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return implementation;
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}
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static int magic (void) __attribute__ ((ifunc ("resolver")));
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int
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main (void)
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{
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bool errors = false;
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if (implementation_called != 0)
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{
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printf ("error: initial value of implementation_called is not zero:"
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" %d\n", implementation_called);
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errors = true;
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}
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/* This can be zero if the reference is bound lazily. */
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printf ("info: initial value of resolver_called: %d\n", resolver_called);
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int magic_value = magic ();
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if (magic_value != random_constant)
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{
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printf ("error: invalid magic value: 0x%x\n", magic_value);
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errors = true;
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}
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printf ("info: resolver_called value: %d\n", resolver_called);
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if (resolver_called == 0)
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{
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/* In theory, the resolver could be called multiple times if
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several relocations are needed. */
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puts ("error: invalid resolver_called value (must not be zero)");
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errors = true;
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}
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printf ("info: implementation_called value: %d\n", implementation_called);
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if (implementation_called != 1)
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{
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puts ("error: invalid implementation_called value (must be 1)");
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errors = true;
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}
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return errors;
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}
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#else /* !HAVE_GCC_IFUNC */
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# include <support/check.h>
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static int
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do_test (void)
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{
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FAIL_UNSUPPORTED ("GCC does not support the ifunc attribute");
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return 1; /* Not reachable. */
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}
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# include <support/test-driver.c>
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#endif
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