mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/* pthread initialization called from __libc_early_init. NPTL version.
|
|
Copyright (C) 2021-2025 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _PTHREAD_EARLY_INIT_H
|
|
#define _PTHREAD_EARLY_INIT_H 1
|
|
|
|
#include <nptl/nptl-stack.h>
|
|
#include <pthreadP.h>
|
|
#include <pthread_mutex_conf.h>
|
|
#include <sys/resource.h>
|
|
|
|
static inline void
|
|
__pthread_early_init (void)
|
|
{
|
|
/* Determine the default allowed stack size. This is the size used
|
|
in case the user does not specify one. */
|
|
struct rlimit limit;
|
|
if (__getrlimit (RLIMIT_STACK, &limit) != 0
|
|
|| limit.rlim_cur == RLIM_INFINITY)
|
|
/* The system limit is not usable. Use an architecture-specific
|
|
default. */
|
|
limit.rlim_cur = ARCH_STACK_DEFAULT_SIZE;
|
|
else if (limit.rlim_cur < PTHREAD_STACK_MIN)
|
|
/* The system limit is unusably small.
|
|
Use the minimal size acceptable. */
|
|
limit.rlim_cur = PTHREAD_STACK_MIN;
|
|
|
|
/* Make sure it meets the minimum size that allocate_stack
|
|
(allocatestack.c) will demand, which depends on the page size. */
|
|
const uintptr_t pagesz = GLRO(dl_pagesize);
|
|
const size_t minstack = (pagesz + __nptl_tls_static_size_for_stack ()
|
|
+ MINIMAL_REST_STACK);
|
|
if (limit.rlim_cur < minstack)
|
|
limit.rlim_cur = minstack;
|
|
|
|
/* Round the resource limit up to page size. */
|
|
limit.rlim_cur = ALIGN_UP (limit.rlim_cur, pagesz);
|
|
__default_pthread_attr.internal.stacksize = limit.rlim_cur;
|
|
__default_pthread_attr.internal.guardsize = GLRO (dl_pagesize);
|
|
|
|
__pthread_tunables_init ();
|
|
}
|
|
|
|
#endif /* _PTHREAD_EARLY_INIT_H */
|