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33237fe83d
And make always supported. The configure option was added on glibc 2.25 and some features require it (such as hwcap mask, huge pages support, and lock elisition tuning). It also simplifies the build permutations. Changes from v1: * Remove glibc.rtld.dynamic_sort changes, it is orthogonal and needs more discussion. * Cleanup more code. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/* pthread initialization called from __libc_early_init. NPTL version.
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Copyright (C) 2021-2023 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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#ifndef _PTHREAD_EARLY_INIT_H
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#define _PTHREAD_EARLY_INIT_H 1
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#include <nptl/nptl-stack.h>
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#include <pthreadP.h>
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#include <pthread_mutex_conf.h>
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#include <sys/resource.h>
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static inline void
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__pthread_early_init (void)
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{
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/* Determine the default allowed stack size. This is the size used
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in case the user does not specify one. */
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struct rlimit limit;
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if (__getrlimit (RLIMIT_STACK, &limit) != 0
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|| limit.rlim_cur == RLIM_INFINITY)
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/* The system limit is not usable. Use an architecture-specific
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default. */
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limit.rlim_cur = ARCH_STACK_DEFAULT_SIZE;
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else if (limit.rlim_cur < PTHREAD_STACK_MIN)
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/* The system limit is unusably small.
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Use the minimal size acceptable. */
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limit.rlim_cur = PTHREAD_STACK_MIN;
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/* Make sure it meets the minimum size that allocate_stack
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(allocatestack.c) will demand, which depends on the page size. */
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const uintptr_t pagesz = GLRO(dl_pagesize);
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const size_t minstack = (pagesz + __nptl_tls_static_size_for_stack ()
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+ MINIMAL_REST_STACK);
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if (limit.rlim_cur < minstack)
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limit.rlim_cur = minstack;
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/* Round the resource limit up to page size. */
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limit.rlim_cur = ALIGN_UP (limit.rlim_cur, pagesz);
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__default_pthread_attr.internal.stacksize = limit.rlim_cur;
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__default_pthread_attr.internal.guardsize = GLRO (dl_pagesize);
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__pthread_tunables_init ();
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}
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#endif /* _PTHREAD_EARLY_INIT_H */
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