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133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/* Tests for powerpc GLIBC_TUNABLES=glibc.cpu.hwcaps filter.
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Copyright (C) 2023-2025 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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<http://www.gnu.org/licenses/>. */
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#include <array_length.h>
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#include <getopt.h>
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#include <ifunc-impl-list.h>
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#include <spawn.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 <support/check.h>
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#include <support/support.h>
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#include <support/xunistd.h>
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#include <sys/auxv.h>
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#include <sys/wait.h>
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/* Nonzero if the program gets called via `exec'. */
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#define CMDLINE_OPTIONS \
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{ "restart", no_argument, &restart, 1 },
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static int restart;
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/* Hold the four initial argument used to respawn the process, plus the extra
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'--direct', '--restart', and the function to check */
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static char *spargs[8];
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static int fc;
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/* Called on process re-execution. */
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_Noreturn static void
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handle_restart (int argc, char *argv[])
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{
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TEST_VERIFY_EXIT (argc == 1);
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const char *funcname = argv[0];
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struct libc_ifunc_impl impls[32];
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int cnt = __libc_ifunc_impl_list ("memcpy", impls, array_length (impls));
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if (cnt == 0)
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_exit (EXIT_SUCCESS);
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TEST_VERIFY_EXIT (cnt >= 1);
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for (int i = 0; i < cnt; i++) {
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if (strcmp (impls[i].name, funcname) == 0)
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{
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TEST_COMPARE (impls[i].usable, false);
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break;
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}
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}
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_exit (EXIT_SUCCESS);
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}
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static void
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run_test (const char *filter, const char *funcname)
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{
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printf ("info: checking filter %s (expect %s ifunc selection to be removed)\n",
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filter, funcname);
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char *tunable = xasprintf ("GLIBC_TUNABLES=glibc.cpu.hwcaps=%s", filter);
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char *const newenvs[] = { (char*) tunable, NULL };
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spargs[fc] = (char *) funcname;
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pid_t pid;
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TEST_COMPARE (posix_spawn (&pid, spargs[0], NULL, NULL, spargs, newenvs), 0);
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int status;
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TEST_COMPARE (xwaitpid (pid, &status, 0), pid);
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TEST_VERIFY (WIFEXITED (status));
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TEST_VERIFY (!WIFSIGNALED (status));
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TEST_COMPARE (WEXITSTATUS (status), 0);
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free (tunable);
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}
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static int
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do_test (int argc, char *argv[])
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{
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if (restart)
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handle_restart (argc - 1, &argv[1]);
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TEST_VERIFY_EXIT (argc == 2 || argc == 5);
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int i;
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for (i = 0; i < argc - 1; i++)
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spargs[i] = argv[i + 1];
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spargs[i++] = (char *) "--direct";
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spargs[i++] = (char *) "--restart";
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fc = i++;
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spargs[i] = NULL;
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unsigned long int hwcap = getauxval (AT_HWCAP);
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unsigned long int hwcap2 = getauxval (AT_HWCAP2);
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if (__WORDSIZE == 64)
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{
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if (hwcap2 & PPC_FEATURE2_ARCH_3_1)
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run_test ("-arch_3_1", "__memcpy_power10");
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if (hwcap2 & PPC_FEATURE2_ARCH_2_07)
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run_test ("-arch_2_07", "__memcpy_power8_cached");
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if (hwcap & PPC_FEATURE_ARCH_2_06)
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run_test ("-arch_2_06", "__memcpy_power7");
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if (hwcap & PPC_FEATURE_ARCH_2_05)
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run_test ("-arch_2_06,-arch_2_05","__memcpy_power6");
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run_test ("-arch_2_06,-arch_2_05,-power5+,-power5,-power4",
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"__memcpy_power4");
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/* Also run with valid, but empty settings. */
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run_test (",-,-arch_2_06,-arch_2_05,-power5+,-power5,,-power4,-",
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"__memcpy_power4");
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}
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else
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{
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if (hwcap & PPC_FEATURE_HAS_VSX)
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run_test ("-vsx", "__memcpy_power7");
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if (hwcap & PPC_FEATURE_ARCH_2_06)
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run_test ("-arch_2_06", "__memcpy_a2");
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if (hwcap & PPC_FEATURE_ARCH_2_05)
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run_test ("-arch_2_05", "__memcpy_power6");
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}
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return 0;
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}
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#define TEST_FUNCTION_ARGV do_test
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#include <support/test-driver.c>
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