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166bb3eac3
The next commit is going to introduce a new implementation of THREAD_GSCOPE_WAIT which needs to access the list of threads. Since it must be usable from the dynamic laoder, we have to move the symbols for the list of threads into the loader. Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-Id: <20210915171110.226187-2-bugaevc@gmail.com> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/* System dependent pthreads code. Hurd version.
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Copyright (C) 2000-2021 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 <stddef.h>
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#include <stdint.h>
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#include <mach.h>
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#include <mach/mig_support.h>
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#include <pt-internal.h>
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#include <pthreadP.h>
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__thread struct __pthread *___pthread_self;
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static void
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reset_pthread_total (void)
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{
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/* Only current thread remains */
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__pthread_total = 1;
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}
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/* This function is called from the Hurd-specific startup code. It
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should return a new stack pointer for the main thread. The caller
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will switch to this new stack before doing anything serious. */
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static void
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_init_routine (void *stack)
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{
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struct __pthread *thread;
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int err;
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pthread_attr_t attr, *attrp = 0;
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if (GL (dl_pthread_threads) != NULL)
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/* Already initialized */
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return;
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/* Initialize the library. */
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___pthread_init ();
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if (stack != NULL)
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{
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/* We are getting initialized due to dlopening a library using libpthread
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while the main program was not linked against libpthread. */
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/* Avoid allocating another stack */
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attrp = &attr;
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__pthread_attr_init (attrp);
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__pthread_attr_setstack (attrp, stack, __vm_page_size);
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}
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/* Create the pthread structure for the main thread (i.e. us). */
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err = __pthread_create_internal (&thread, attrp, 0, 0);
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assert_perror (err);
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/* XXX The caller copies the command line arguments and the environment
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to the new stack. Pretend it wasn't allocated so that it remains
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valid if the main thread terminates. */
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thread->stack = 0;
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thread->tcb = THREAD_SELF;
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#ifndef PAGESIZE
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__pthread_default_attr.__guardsize = __vm_page_size;
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#endif
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___pthread_self = thread;
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/* Decrease the number of threads, to take into account that the
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signal thread (which will be created by the glibc startup code
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when we return from here) shouldn't be seen as a user thread. */
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__pthread_total--;
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__pthread_atfork (NULL, NULL, reset_pthread_total);
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GL(dl_init_static_tls) = &__pthread_init_static_tls;
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/* Make MiG code thread aware. */
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__mig_init (thread->stackaddr);
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}
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void
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__pthread_initialize_minimal (void)
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{
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_init_routine (__libc_stack_end);
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}
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#ifdef SHARED
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__attribute__ ((constructor))
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static void
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dynamic_init_routine (void)
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{
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_init_routine (__libc_stack_end);
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}
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#endif
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