mirror of git://sourceware.org/git/glibc.git
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/* Test the state save/restore procedures during signal handling.
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Copyright (C) 2025-2026 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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#include <assert.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdatomic.h>
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#include <mach/message.h>
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#include <mach/gnumach.h>
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#include <mach/mach_traps.h>
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#include <mach-shortcuts.h>
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#include <mach_init.h>
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#include <hurd/io.h>
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#include <hurd/io_reply.h>
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#include <support/check.h>
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#include <support/xthread.h>
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#include "test-xstate.h"
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static volatile atomic_bool startflag = ATOMIC_VAR_INIT (false);
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static volatile atomic_bool loopflag = ATOMIC_VAR_INIT (true);
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void handler (int signum, siginfo_t *info, void *context)
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{
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char mmxbuf3[MMXSTATE_BUFFER_SIZE];
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char xbuf3[XSTATE_BUFFER_SIZE];
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memset (mmxbuf3, 0x77, MMXSTATE_BUFFER_SIZE);
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memset (xbuf3, 0x77, XSTATE_BUFFER_SIZE);
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SET_MMXSTATE (mmxbuf3);
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SET_XSTATE (xbuf3);
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printf ("signal %d setting a different CPU state\n", signum);
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atomic_store_explicit (&loopflag, false, memory_order_release);
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}
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/* Helper thread to send a signal to the main thread */
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void* signal_sender (void *arg)
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{
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sigset_t ss;
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assert (! sigemptyset (&ss));
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assert (! sigaddset (&ss, SIGUSR1));
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assert (! sigprocmask (SIG_BLOCK, &ss, NULL));
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while (!atomic_load_explicit (&startflag, memory_order_acquire))
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;
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TEST_COMPARE (kill (getpid (), SIGUSR1), 0);
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return NULL;
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}
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static int do_test (void)
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{
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#if ! XSTATE_HELPERS_SUPPORTED
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FAIL_UNSUPPORTED ("Test not supported on this arch.");
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#endif
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struct sigaction act = { 0 };
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act.sa_sigaction = &handler;
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TEST_COMPARE (sigaction (SIGUSR1, &act, NULL), 0);
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pthread_t thsender = xpthread_create (NULL, signal_sender, NULL);
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char mmxbuf1[MMXSTATE_BUFFER_SIZE], mmxbuf2[MMXSTATE_BUFFER_SIZE];
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char xbuf1[XSTATE_BUFFER_SIZE], xbuf2[XSTATE_BUFFER_SIZE];
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memset (mmxbuf1, 0x33, MMXSTATE_BUFFER_SIZE);
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memset (xbuf1, 0x33, XSTATE_BUFFER_SIZE);
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SET_MMXSTATE (mmxbuf1);
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SET_XSTATE (xbuf1);
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atomic_store_explicit (&startflag, true, memory_order_release);
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while (atomic_load_explicit (&loopflag, memory_order_acquire))
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;
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GET_MMXSTATE (mmxbuf2);
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GET_XSTATE (xbuf2);
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TEST_COMPARE_BLOB (mmxbuf1, sizeof (mmxbuf1), mmxbuf2, sizeof (mmxbuf2));
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TEST_COMPARE_BLOB (xbuf1, sizeof (xbuf1), xbuf2, sizeof (xbuf2));
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xpthread_join (thsender);
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return EXIT_SUCCESS;
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}
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#include <support/test-driver.c>
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