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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
214 lines
4.7 KiB
C
214 lines
4.7 KiB
C
/* Copyright (C) 2003-2022 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 <errno.h>
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#include <error.h>
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#include <limits.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ucontext.h>
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#include <support/support.h>
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#define N 4
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#if __WORDSIZE == 64
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#define GUARD_PATTERN 0xdeadbeafdeadbeaf
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#else
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#define GUARD_PATTERN 0xdeadbeaf
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#endif
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typedef struct {
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ucontext_t uctx;
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unsigned long guard[3];
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} tst_context_t;
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static char *stacks[N];
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static size_t stack_size;
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static tst_context_t ctx[N][2];
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static volatile int failures;
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static void
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fct (long int n)
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{
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char on_stack[1];
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/* Just to use the thread local descriptor. */
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printf ("%ld: in %s now, on_stack = %p\n", n, __FUNCTION__, on_stack);
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errno = 0;
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if (ctx[n][1].uctx.uc_link != &ctx[n][0].uctx)
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{
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printf ("context[%ld][1] uc_link damaged, = %p\n", n,
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ctx[n][1].uctx.uc_link);
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exit (1);
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}
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if ((ctx[n][0].guard[0] != GUARD_PATTERN)
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|| (ctx[n][0].guard[1] != GUARD_PATTERN)
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|| (ctx[n][0].guard[2] != GUARD_PATTERN))
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{
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printf ("%ld: %s context[0] overflow detected!\n", n, __FUNCTION__);
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++failures;
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}
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if ((ctx[n][1].guard[0] != GUARD_PATTERN)
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|| (ctx[n][1].guard[1] != GUARD_PATTERN)
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|| (ctx[n][1].guard[2] != GUARD_PATTERN))
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{
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printf ("%ld: %s context[1] overflow detected!\n", n, __FUNCTION__);
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++failures;
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}
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if (n < 0 || n >= N)
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{
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printf ("%ld out of range\n", n);
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exit (1);
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}
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if (on_stack < stacks[n] || on_stack >= stacks[n] + stack_size)
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{
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printf ("%ld: on_stack not on appropriate stack\n", n);
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exit (1);
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}
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}
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static void *
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tf (void *arg)
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{
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int n = (int) (long int) arg;
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ctx[n][0].guard[0] = GUARD_PATTERN;
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ctx[n][0].guard[1] = GUARD_PATTERN;
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ctx[n][0].guard[2] = GUARD_PATTERN;
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ctx[n][1].guard[0] = GUARD_PATTERN;
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ctx[n][1].guard[1] = GUARD_PATTERN;
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ctx[n][1].guard[2] = GUARD_PATTERN;
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if (getcontext (&ctx[n][1].uctx) != 0)
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{
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printf ("%d: cannot get context: %m\n", n);
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exit (1);
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}
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printf ("%d: %s: before makecontext\n", n, __FUNCTION__);
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ctx[n][1].uctx.uc_stack.ss_sp = stacks[n];
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ctx[n][1].uctx.uc_stack.ss_size = stack_size;
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ctx[n][1].uctx.uc_link = &ctx[n][0].uctx;
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makecontext (&ctx[n][1].uctx, (void (*) (void)) fct, 1, (long int) n);
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printf ("%d: %s: before swapcontext\n", n, __FUNCTION__);
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if (swapcontext (&ctx[n][0].uctx, &ctx[n][1].uctx) != 0)
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{
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++failures;
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printf ("%d: %s: swapcontext failed\n", n, __FUNCTION__);
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}
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else
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printf ("%d: back in %s\n", n, __FUNCTION__);
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return NULL;
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}
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static volatile int global;
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static int
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do_test (void)
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{
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int n;
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pthread_t th[N];
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ucontext_t mctx;
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stack_size = 2 * PTHREAD_STACK_MIN;
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for (int i = 0; i < N; i++)
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stacks[i] = xmalloc (stack_size);
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puts ("making contexts");
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if (getcontext (&mctx) != 0)
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{
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if (errno == ENOSYS)
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{
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puts ("context handling not supported");
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exit (0);
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}
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printf ("%s: getcontext: %m\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 (&mctx) != 0)
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{
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puts ("setcontext failed");
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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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puts ("global not incremented twice");
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exit (1);
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}
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puts ("global OK");
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pthread_attr_t at;
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if (pthread_attr_init (&at) != 0)
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{
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puts ("attr_init failed");
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return 1;
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}
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if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
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{
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puts ("attr_setstacksize failed");
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return 1;
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}
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for (n = 0; n < N; ++n)
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if (pthread_create (&th[n], &at, tf, (void *) (long int) n) != 0)
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{
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puts ("create failed");
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exit (1);
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}
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if (pthread_attr_destroy (&at) != 0)
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{
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puts ("attr_destroy failed");
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return 1;
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}
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for (n = 0; n < N; ++n)
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if (pthread_join (th[n], NULL) != 0)
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{
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puts ("join failed");
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exit (1);
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}
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for (int i = 0; i < N; i++)
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free (stacks[i]);
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return failures;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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