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Remove tst-sigcontext test.
It's bogus in many places.
This commit is contained in:
Ulrich Drepper
parent
9250545663
commit
a87cd2894c
@ -1,5 +1,6 @@
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2009-12-15 Maciej W. Rozycki <macro@codesourcery.com>
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[BZ #11115]
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* stdlib/tst-makecontext3.c: New file.
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* stdlib/tst-sigcontext.c: file.
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* stdlib/Makefile (tests): Add new tests.
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@ -71,7 +71,7 @@ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
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tst-atof1 tst-atof2 tst-strtod2 tst-strtod3 tst-rand48-2 \
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tst-makecontext tst-strtod4 tst-strtod5 tst-qsort2 \
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tst-makecontext2 tst-strtod6 tst-unsetenv1 \
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tst-makecontext3 tst-sigcontext
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tst-makecontext3
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include ../Makeconfig
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@ -1,312 +0,0 @@
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/* Copyright (C) 2009 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
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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, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include <errno.h>
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#include <signal.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 <time.h>
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#include <ucontext.h>
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#include <unistd.h>
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static volatile ucontext_t ctx[3];
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static volatile int flags[3];
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static volatile int oflag;
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static volatile int flag;
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static volatile int sig_errno_set;
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static volatile int sig_errno;
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static volatile int sig_ready;
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static int was_in_f1;
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static int was_in_f2;
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static char st2[32768];
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static long long int max;
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static volatile long long int count;
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/* These have to be run with the caller's frame. */
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static inline int sig_getcontext (int) __attribute__ ((always_inline));
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static inline int sig_swapcontext (int, int) __attribute__ ((always_inline));
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static void
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sig_gethandler (int signo, siginfo_t *info, void *context)
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{
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ucontext_t *ucp = context;
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if (! sig_ready)
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{
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alarm (1);
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return;
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}
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ctx[flag] = *ucp;
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flags[flag] = 1;
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sig_errno_set = 1;
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sig_errno = 0;
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}
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static void
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sig_swaphandler (int signo, siginfo_t *info, void *context)
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{
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ucontext_t *oucp = context;
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ucontext_t *ucp = (ucontext_t *) (ctx + flag);
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if (! sig_ready)
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{
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alarm (1);
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return;
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}
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ctx[oflag] = *oucp;
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flags[oflag] = 1;
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sig_errno_set = 1;
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sig_errno = setcontext (ucp);
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}
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static int
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sig_getcontext (int uci)
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{
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struct sigaction sa;
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sigemptyset (&sa.sa_mask);
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sa.sa_flags = SA_SIGINFO;
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sa.sa_sigaction = sig_gethandler;
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if (sigaction (SIGALRM, &sa, NULL) < 0)
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{
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printf ("%s: sigaction ALRM failed: %m\n", __FUNCTION__);
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exit (1);
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}
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flag = uci;
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sig_errno_set = 0;
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sig_ready = 0;
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alarm (1);
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/* Need to get the signal in this frame. */
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sig_ready = 1;
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for (count = max; count > 0; count--)
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if (sig_errno_set)
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break;
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if (! sig_errno_set)
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{
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printf ("%s: ALRM signal not received\n", __FUNCTION__);
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exit (1);
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}
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return 0;
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}
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static int
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sig_swapcontext (int ouci, int uci)
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{
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struct sigaction sa;
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sigemptyset (&sa.sa_mask);
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sa.sa_flags = SA_SIGINFO;
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sa.sa_sigaction = sig_swaphandler;
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if (sigaction (SIGALRM, &sa, NULL) < 0)
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{
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printf ("%s: sigaction ALRM failed: %m\n", __FUNCTION__);
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exit (1);
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}
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flag = uci;
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oflag = ouci;
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sig_errno_set = 0;
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sig_ready = 0;
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alarm (1);
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/* Need to get the signal in this frame. */
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sig_ready = 1;
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for (count = max; count > 0; count--)
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if (sig_errno_set)
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break;
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if (! sig_errno_set)
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{
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printf ("%s: ALRM signal not received\n", __FUNCTION__);
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exit (1);
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}
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return sig_errno;
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}
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static void
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f1 (int a0, int a1, int a2, int a3)
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{
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int status;
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printf ("start f1(a0=%x,a1=%x,a2=%x,a3=%x)\n", a0, a1, a2, a3);
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if (a0 != 1 || a1 != 2 || a2 != 3 || a3 != -4)
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{
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puts ("arg mismatch");
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exit (-1);
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}
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status = sig_swapcontext (1, 2);
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if (status != 0)
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{
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printf ("%s: swapping contexts failed: %s\n",
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__FUNCTION__, strerror (status));
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exit (1);
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}
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puts ("finish f1");
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was_in_f1 = 1;
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}
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static void
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f2 (void)
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{
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int status;
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puts ("start f2");
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status = sig_swapcontext (2, 1);
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if (status != 0)
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{
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printf ("%s: swapping contexts failed: %s\n",
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__FUNCTION__, strerror (status));
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exit (1);
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}
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puts ("finish f2");
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was_in_f2 = 1;
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}
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static int back_in_main;
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static void
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check_called (void)
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{
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if (back_in_main == 0)
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{
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printf ("%s: program did not reach main again", __FUNCTION__);
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_exit (1);
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}
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}
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volatile int global;
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int
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main (void)
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{
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char st1[32768];
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time_t t0, t1;
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int status;
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atexit (check_called);
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puts ("calibrating delay loop");
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for (max = 0x10000; max < LLONG_MAX / 2; max *= 2)
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{
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t0 = time (NULL);
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for (count = max; count > 0; count--);
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t1 = time (NULL);
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if (difftime (t1, t0) > 10.0)
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break;
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}
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puts ("making contexts");
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sig_getcontext (1);
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if (! flags[1])
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{
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printf ("%s: context not retrieved\n", __FUNCTION__);
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exit (1);
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}
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/* Play some tricks with this context. */
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if (++global == 1)
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if (setcontext ((ucontext_t *) &ctx[1]) != 0)
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{
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if (errno == ENOSYS)
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{
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back_in_main = 1;
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exit (0);
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}
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printf ("%s: setcontext: %m\n", __FUNCTION__);
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exit (1);
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}
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if (global != 2)
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{
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printf ("%s: 'global' not incremented twice\n", __FUNCTION__);
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exit (1);
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}
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ctx[1].uc_stack.ss_sp = st1;
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ctx[1].uc_stack.ss_size = sizeof st1;
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ctx[1].uc_link = (ucontext_t *) &ctx[0];
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{
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ucontext_t tempctx = ctx[1];
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makecontext ((ucontext_t *) &ctx[1], (void (*) (void)) f1, 4, 1, 2, 3, -4);
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/* Without this check, a stub makecontext can make us spin forever. */
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if (memcmp (&tempctx, (void *) &ctx[1], sizeof ctx[1]) == 0)
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{
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puts ("makecontext was a no-op, presuming not implemented");
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return 0;
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}
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}
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sig_getcontext (2);
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if (! flags[2])
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{
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printf ("%s: second context not retrieved\n", __FUNCTION__);
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exit (1);
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}
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ctx[2].uc_stack.ss_sp = st2;
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ctx[2].uc_stack.ss_size = sizeof st2;
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ctx[2].uc_link = (ucontext_t *) &ctx[1];
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makecontext ((ucontext_t *) &ctx[2], f2, 0);
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puts ("swapping contexts");
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status = sig_swapcontext (0, 2);
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if (status != 0)
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{
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printf ("%s: swapping contexts failed: %s\n",
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__FUNCTION__, strerror (status));
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exit (1);
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}
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puts ("back at main program");
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back_in_main = 1;
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if (was_in_f1 == 0)
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{
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puts ("didn't reach f1");
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exit (1);
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}
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if (was_in_f2 == 0)
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{
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puts ("didn't reach f2");
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exit (1);
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}
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puts ("test succeeded");
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return 0;
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}
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