diff options
Diffstat (limited to 'sysdeps/mips/tst-mode-switch-2.c')
| -rw-r--r-- | sysdeps/mips/tst-mode-switch-2.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/sysdeps/mips/tst-mode-switch-2.c b/sysdeps/mips/tst-mode-switch-2.c new file mode 100644 index 0000000000..c328896c2c --- /dev/null +++ b/sysdeps/mips/tst-mode-switch-2.c @@ -0,0 +1,163 @@ +/* Copyright (C) 2014 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 + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <limits.h> +#include <pthread.h> +#include <sys/prctl.h> + +#if __mips_fpr != 0 || _MIPS_SPFPSET != 16 +# error This test requires -mfpxx -mno-odd-spreg +#endif + +/* This test verifies that all threads in a process see a mode + change when any thread causes a mode change. */ + +static int mode[6] = + { + 0, + PR_FP_MODE_FR, + PR_FP_MODE_FR | PR_FP_MODE_FRE, + PR_FP_MODE_FR, + 0, + PR_FP_MODE_FR | PR_FP_MODE_FRE + }; +static volatile int current_mode; +static volatile int finished; +static pthread_barrier_t barr_ready; +static pthread_barrier_t barr_cont; + +static void * +thread_function (void * arg __attribute__ ((unused))) +{ + while (!finished) + { + int res = pthread_barrier_wait (&barr_ready); + + if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) + { + printf ("barrier wait failed: %m\n"); + exit (1); + } + + int mode = prctl (PR_GET_FP_MODE); + + if (mode != current_mode) + { + printf ("unexpected mode: %d != %d\n", mode, current_mode); + exit (1); + } + + res = pthread_barrier_wait (&barr_cont); + + if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) + { + printf ("barrier wait failed: %m\n"); + exit (1); + } + } + return NULL; +} + +int +main (void) +{ + int count = sysconf (_SC_NPROCESSORS_ONLN); + if (count <= 0) + count = 1; + count *= 4; + + pthread_t th[count]; + int i; + int result = 0; + + if (pthread_barrier_init (&barr_ready, NULL, count + 1) != 0) + { + printf ("failed to initialize barrier: %m\n"); + exit (1); + } + + if (pthread_barrier_init (&barr_cont, NULL, count + 1) != 0) + { + printf ("failed to initialize barrier: %m\n"); + exit (1); + } + + for (i = 0; i < count; ++i) + if (pthread_create (&th[i], NULL, thread_function, 0) != 0) + { + printf ("creation of thread %d failed\n", i); + exit (1); + } + + for (i = 0 ; i < 7 ; i++) + { + if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0) + { + if (errno != ENOTSUP) + { + printf ("prctl PR_SET_FP_MODE failed: %m"); + exit (1); + } + } + else + current_mode = mode[i % 6]; + + + int res = pthread_barrier_wait (&barr_ready); + + if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) + { + printf ("barrier wait failed: %m\n"); + exit (1); + } + + if (i == 6) + finished = 1; + + res = pthread_barrier_wait (&barr_cont); + + if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) + { + printf ("barrier wait failed: %m\n"); + exit (1); + } + } + + for (i = 0; i < count; ++i) + { + void *v; + if (pthread_join (th[i], &v) != 0) + { + printf ("join of thread %d failed\n", i); + result = 1; + } + else if (v != NULL) + { + printf ("join %d successful, but child failed\n", i); + result = 1; + } + else + printf ("join %d successful\n", i); + } + + return result; +} |