From: "H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>
To: libc-alpha@sourceware.org
Subject: [PATCH v5] Define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN)
Date: Fri, 9 Jul 2021 14:09:18 -0700 [thread overview]
Message-ID: <20210709210918.4246-1-hjl.tools@gmail.com> (raw)
The constant PTHREAD_STACK_MIN may be too small for some processors.
Rename _SC_SIGSTKSZ_SOURCE to _DYNAMIC_STACK_SIZE_SOURCE. When
_DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined, define
PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN) which is changed
to MIN (PTHREAD_STACK_MIN, sysconf(_SC_MINSIGSTKSZ)).
Consolidate <bits/local_lim.h> with <bits/pthread_stack_min.h> to
provide a constant target specific PTHREAD_STACK_MIN value.
---
NEWS | 8 +-
include/bits/local_lim.h | 7 ++
include/features.h | 18 ++--
manual/creature.texi | 4 +-
nptl/tst-context1.c | 15 ++-
stdlib/test-atexit-race-common.c | 11 +-
support/support_path_support_time64.c | 1 +
sysdeps/posix/sysconf-pthread_stack_min.h | 29 +++++
sysdeps/posix/sysconf.c | 7 +-
sysdeps/unix/sysv/linux/Makefile | 3 +-
.../unix/sysv/linux/aarch64/bits/local_lim.h | 101 ------------------
.../linux/aarch64/bits/pthread_stack_min.h | 22 ++++
.../unix/sysv/linux/alpha/bits/local_lim.h | 99 -----------------
.../sysv/linux/alpha/bits/pthread_stack_min.h | 20 ++++
sysdeps/unix/sysv/linux/bits/local_lim.h | 8 +-
.../unix/sysv/linux/bits/pthread_stack_min.h | 20 ++++
sysdeps/unix/sysv/linux/bits/sigstksz.h | 2 +-
sysdeps/unix/sysv/linux/ia64/bits/local_lim.h | 99 -----------------
.../sysv/linux/ia64/bits/pthread_stack_min.h | 20 ++++
sysdeps/unix/sysv/linux/mips/bits/local_lim.h | 99 -----------------
.../sysv/linux/mips/bits/pthread_stack_min.h | 20 ++++
.../unix/sysv/linux/powerpc/bits/local_lim.h | 100 -----------------
.../linux/powerpc/bits/pthread_stack_min.h | 21 ++++
.../unix/sysv/linux/sparc/bits/local_lim.h | 99 -----------------
.../sysv/linux/sparc/bits/pthread_stack_min.h | 20 ++++
.../sysv/linux/sysconf-pthread_stack_min.h | 39 +++++++
26 files changed, 266 insertions(+), 626 deletions(-)
create mode 100644 include/bits/local_lim.h
create mode 100644 sysdeps/posix/sysconf-pthread_stack_min.h
delete mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h
create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/pthread_stack_min.h
delete mode 100644 sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
create mode 100644 sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h
create mode 100644 sysdeps/unix/sysv/linux/bits/pthread_stack_min.h
delete mode 100644 sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
create mode 100644 sysdeps/unix/sysv/linux/ia64/bits/pthread_stack_min.h
delete mode 100644 sysdeps/unix/sysv/linux/mips/bits/local_lim.h
create mode 100644 sysdeps/unix/sysv/linux/mips/bits/pthread_stack_min.h
delete mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
create mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/pthread_stack_min.h
delete mode 100644 sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
create mode 100644 sysdeps/unix/sysv/linux/sparc/bits/pthread_stack_min.h
create mode 100644 sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h
diff --git a/NEWS b/NEWS
index 91d5f17598..13ffe627da 100644
--- a/NEWS
+++ b/NEWS
@@ -9,8 +9,12 @@ Version 2.34
Major new features:
-* Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _SC_SIGSTKSZ_SOURCE or
- _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
+* When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined,
+ PTHREAD_STACK_MIN is no longer constant and is redefined to
+ sysconf(_SC_THREAD_STACK_MIN).
+
+* Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE
+ or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ).
diff --git a/include/bits/local_lim.h b/include/bits/local_lim.h
new file mode 100644
index 0000000000..46d82dc729
--- /dev/null
+++ b/include/bits/local_lim.h
@@ -0,0 +1,7 @@
+/* Don't define PTHREAD_STACK_MIN to sysconf (_SC_THREAD_STACK_MIN) for
+ glibc build. */
+#if !defined _ISOMAC
+# undef __USE_DYNAMIC_STACK_SIZE
+#endif
+
+#include_next <bits/local_lim.h>
diff --git a/include/features.h b/include/features.h
index 039bcb112b..51c8a98fb0 100644
--- a/include/features.h
+++ b/include/features.h
@@ -50,8 +50,8 @@
_LARGEFILE64_SOURCE Additional functionality from LFS for large files.
_FILE_OFFSET_BITS=N Select default filesystem interface.
_ATFILE_SOURCE Additional *at interfaces.
- _SC_SIGSTKSZ_SOURCE Select correct (but non compile-time constant)
- MINSIGSTKSZ and SIGSTKSZ.
+ _DYNAMIC_STACK_SIZE_SOURCE Select correct (but non compile-time constant)
+ MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN.
_GNU_SOURCE All of the above, plus GNU extensions.
_DEFAULT_SOURCE The default set of features (taking precedence over
__STRICT_ANSI__).
@@ -98,8 +98,8 @@
__USE_FILE_OFFSET64 Define 64bit interface as default.
__USE_MISC Define things from 4.3BSD or System V Unix.
__USE_ATFILE Define *at interfaces and AT_* constants for them.
- __USE_SC_SIGSTKSZ Define correct (but non compile-time constant)
- MINSIGSTKSZ and SIGSTKSZ.
+ __USE_DYNAMIC_STACK_SIZE Define correct (but non compile-time constant)
+ MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN.
__USE_GNU Define GNU extensions.
__USE_FORTIFY_LEVEL Additional security measures used, according to level.
@@ -143,7 +143,7 @@
#undef __USE_FILE_OFFSET64
#undef __USE_MISC
#undef __USE_ATFILE
-#undef __USE_SC_SIGSTKSZ
+#undef __USE_DYNAMIC_STACK_SIZE
#undef __USE_GNU
#undef __USE_FORTIFY_LEVEL
#undef __KERNEL_STRICT_NAMES
@@ -220,8 +220,8 @@
# define _DEFAULT_SOURCE 1
# undef _ATFILE_SOURCE
# define _ATFILE_SOURCE 1
-# undef _SC_SIGSTKSZ_SOURCE
-# define _SC_SIGSTKSZ_SOURCE 1
+# undef _DYNAMIC_STACK_SIZE_SOURCE
+# define _DYNAMIC_STACK_SIZE_SOURCE 1
#endif
/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
@@ -399,8 +399,8 @@
# define __USE_ATFILE 1
#endif
-#ifdef _SC_SIGSTKSZ_SOURCE
-# define __USE_SC_SIGSTKSZ 1
+#ifdef _DYNAMIC_STACK_SIZE_SOURCE
+# define __USE_DYNAMIC_STACK_SIZE 1
#endif
#ifdef _GNU_SOURCE
diff --git a/manual/creature.texi b/manual/creature.texi
index d3c4fa4702..c13de52f1f 100644
--- a/manual/creature.texi
+++ b/manual/creature.texi
@@ -308,10 +308,10 @@ checks are applied. If defined to @math{3}, @theglibc{} may also use
checks that may have an additional performance overhead.
@end defvr
-@defvr Macro _SC_SIGSTKSZ_SOURCE
+@defvr Macro _DYNAMIC_STACK_SIZE_SOURCE
@standards{GNU, (none)}
If this macro is defined, correct (but non compile-time constant)
-MINSIGSTKSZ and SIGSTKSZ are defined.
+MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN are defined.
@end defvr
@defvr Macro _REENTRANT
diff --git a/nptl/tst-context1.c b/nptl/tst-context1.c
index 821f3c2133..00e39aff9f 100644
--- a/nptl/tst-context1.c
+++ b/nptl/tst-context1.c
@@ -23,6 +23,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <ucontext.h>
+#include <support/support.h>
#define N 4
#if __WORDSIZE == 64
@@ -36,7 +37,8 @@ typedef struct {
unsigned long guard[3];
} tst_context_t;
-static char stacks[N][2 * PTHREAD_STACK_MIN];
+static char *stacks[N];
+static size_t stack_size;
static tst_context_t ctx[N][2];
static volatile int failures;
@@ -79,7 +81,7 @@ fct (long int n)
exit (1);
}
- if (on_stack < stacks[n] || on_stack >= stacks[n] + sizeof (stacks[0]))
+ if (on_stack < stacks[n] || on_stack >= stacks[n] + stack_size)
{
printf ("%ld: on_stack not on appropriate stack\n", n);
exit (1);
@@ -109,7 +111,7 @@ tf (void *arg)
printf ("%d: %s: before makecontext\n", n, __FUNCTION__);
ctx[n][1].uctx.uc_stack.ss_sp = stacks[n];
- ctx[n][1].uctx.uc_stack.ss_size = sizeof (stacks[n]);
+ ctx[n][1].uctx.uc_stack.ss_size = stack_size;
ctx[n][1].uctx.uc_link = &ctx[n][0].uctx;
makecontext (&ctx[n][1].uctx, (void (*) (void)) fct, 1, (long int) n);
@@ -137,6 +139,10 @@ do_test (void)
pthread_t th[N];
ucontext_t mctx;
+ stack_size = 2 * PTHREAD_STACK_MIN;
+ for (int i = 0; i < N; i++)
+ stacks[i] = xmalloc (stack_size);
+
puts ("making contexts");
if (getcontext (&mctx) != 0)
{
@@ -198,6 +204,9 @@ do_test (void)
exit (1);
}
+ for (int i = 0; i < N; i++)
+ free (stacks[i]);
+
return failures;
}
diff --git a/stdlib/test-atexit-race-common.c b/stdlib/test-atexit-race-common.c
index a2b5468580..b48bb16285 100644
--- a/stdlib/test-atexit-race-common.c
+++ b/stdlib/test-atexit-race-common.c
@@ -38,11 +38,6 @@
const size_t kNumThreads = 1024;
const size_t kNumHandlers = 1024;
-const size_t kStacksize =
-#ifdef PTHREAD_STACK_MIN
- 0x20000 < PTHREAD_STACK_MIN ? PTHREAD_STACK_MIN :
-#endif
- 0x20000;
static void *
threadfunc (void *unused)
@@ -66,6 +61,12 @@ do_test (void)
/* With default 8MiB Linux stack size, creating 1024 threads can cause
VM exhausiton on 32-bit machines. Reduce stack size of each thread to
128KiB for a maximum required VM size of 128MiB. */
+ size_t kStacksize =
+#ifdef PTHREAD_STACK_MIN
+ 0x20000 < PTHREAD_STACK_MIN ? PTHREAD_STACK_MIN :
+#endif
+ 0x20000;
+
xpthread_attr_setstacksize (&attr, kStacksize);
for (i = 0; i < kNumThreads; ++i) {
diff --git a/support/support_path_support_time64.c b/support/support_path_support_time64.c
index 33b2bdff66..619a4eab00 100644
--- a/support/support_path_support_time64.c
+++ b/support/support_path_support_time64.c
@@ -17,6 +17,7 @@
<https://www.gnu.org/licenses/>. */
#include <fcntl.h>
+#include <unistd.h>
#include <support/check.h>
#include <support/support.h>
#include <sys/stat.h>
diff --git a/sysdeps/posix/sysconf-pthread_stack_min.h b/sysdeps/posix/sysconf-pthread_stack_min.h
new file mode 100644
index 0000000000..f5be2e6f9f
--- /dev/null
+++ b/sysdeps/posix/sysconf-pthread_stack_min.h
@@ -0,0 +1,29 @@
+/* __get_pthread_stack_min (). POSIX version.
+ Copyright (C) 2021 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/>. */
+
+/* Return sysconf (_SC_THREAD_STACK_MIN). */
+
+static inline long int
+__get_pthread_stack_min (void)
+{
+#ifdef PTHREAD_STACK_MIN
+ return PTHREAD_STACK_MIN;
+#else
+ return -1;
+#endif
+}
diff --git a/sysdeps/posix/sysconf.c b/sysdeps/posix/sysconf.c
index 3e8ec5cd51..5fb3fb6c1c 100644
--- a/sysdeps/posix/sysconf.c
+++ b/sysdeps/posix/sysconf.c
@@ -31,6 +31,7 @@
#include <sys/types.h>
#include <sys/uio.h>
#include <regex.h>
+#include <sysconf-pthread_stack_min.h>
#define NEED_SPEC_ARRAY 0
#include <posix-conf-vars.h>
@@ -569,11 +570,7 @@ __sysconf (int name)
#endif
case _SC_THREAD_STACK_MIN:
-#ifdef PTHREAD_STACK_MIN
- return PTHREAD_STACK_MIN;
-#else
- return -1;
-#endif
+ return __get_pthread_stack_min ();
case _SC_THREAD_THREADS_MAX:
#ifdef PTHREAD_THREADS_MAX
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index d45a16af8b..7d43dc95f2 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -108,7 +108,8 @@ sysdep_headers += sys/mount.h sys/acct.h \
bits/types/struct_semid64_ds.h \
bits/types/struct_semid64_ds_helper.h \
bits/types/struct_shmid64_ds.h \
- bits/types/struct_shmid64_ds_helper.h
+ bits/types/struct_shmid64_ds_helper.h \
+ bits/pthread_stack_min.h
tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h b/sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h
deleted file mode 100644
index 0652bf4a06..0000000000
--- a/sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/* Minimum guaranteed maximum values for system limits. Linux version.
- Copyright (C) 1993-2021 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/>. */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
- and defines LINK_MAX although filesystems have different maxima. A
- similar thing is true for OPEN_MAX: the limit can be changed at
- runtime and therefore the macro must not be defined. Remove this
- after including the header if necessary. */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information. */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN? */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX? */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX? */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX? */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process. */
-#define _POSIX_THREAD_KEYS_MAX 128
-/* This is the value this implementation supports. */
-#define PTHREAD_KEYS_MAX 1024
-
-/* Controlling the iterations of destructors for thread-specific data. */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
-/* Number of iterations this implementation does. */
-#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process. */
-#define _POSIX_THREAD_THREADS_MAX 64
-/* We have no predefined limit on the number of threads. */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
- priority level. */
-#define AIO_PRIO_DELTA_MAX 20
-
-/* Minimum size for a thread. At least two pages for systems with 64k
- pages. */
-#define PTHREAD_STACK_MIN 131072
-
-/* Maximum number of timer expiration overruns. */
-#define DELAYTIMER_MAX 2147483647
-
-/* Maximum tty name length. */
-#define TTY_NAME_MAX 32
-
-/* Maximum login name length. This is arbitrary. */
-#define LOGIN_NAME_MAX 256
-
-/* Maximum host name length. */
-#define HOST_NAME_MAX 64
-
-/* Maximum message queue priority level. */
-#define MQ_PRIO_MAX 32768
-
-/* Maximum value the semaphore can have. */
-#define SEM_VALUE_MAX (2147483647)
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/aarch64/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..97215687ad
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/pthread_stack_min.h
@@ -0,0 +1,22 @@
+/* Definition of PTHREAD_STACK_MIN. Linux/aarch64 version.
+ Copyright (C) 2021 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/>. */
+
+/* Minimum size for a thread. At least two pages for systems with 64k
+ pages. */
+#define PTHREAD_STACK_MIN 131072
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h b/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
deleted file mode 100644
index 523407dc48..0000000000
--- a/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits. Linux/Alpha version.
- Copyright (C) 1993-2021 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library. If not, see
- <https://www.gnu.org/licenses/>. */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
- and defines LINK_MAX although filesystems have different maxima. A
- similar thing is true for OPEN_MAX: the limit can be changed at
- runtime and therefore the macro must not be defined. Remove this
- after including the header if necessary. */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information. */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN? */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX? */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX? */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX? */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process. */
-#define _POSIX_THREAD_KEYS_MAX 128
-/* This is the value this implementation supports. */
-#define PTHREAD_KEYS_MAX 1024
-
-/* Controlling the iterations of destructors for thread-specific data. */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
-/* Number of iterations this implementation does. */
-#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process. */
-#define _POSIX_THREAD_THREADS_MAX 64
-/* We have no predefined limit on the number of threads. */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
- priority level. */
-#define AIO_PRIO_DELTA_MAX 20
-
-/* Minimum size for a thread. We are free to choose a reasonable value. */
-#define PTHREAD_STACK_MIN 24576
-
-/* Maximum number of timer expiration overruns. */
-#define DELAYTIMER_MAX 2147483647
-
-/* Maximum tty name length. */
-#define TTY_NAME_MAX 32
-
-/* Maximum login name length. This is arbitrary. */
-#define LOGIN_NAME_MAX 256
-
-/* Maximum host name length. */
-#define HOST_NAME_MAX 64
-
-/* Maximum message queue priority level. */
-#define MQ_PRIO_MAX 32768
-
-/* Maximum value the semaphore can have. */
-#define SEM_VALUE_MAX (2147483647)
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..5bfb0e10dd
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN. Linux/Alpha version.
+ Copyright (C) 2021 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+/* Minimum size for a thread. We are free to choose a reasonable value. */
+#define PTHREAD_STACK_MIN 24576
diff --git a/sysdeps/unix/sysv/linux/bits/local_lim.h b/sysdeps/unix/sysv/linux/bits/local_lim.h
index b88ca3d4d2..0b1c7f40be 100644
--- a/sysdeps/unix/sysv/linux/bits/local_lim.h
+++ b/sysdeps/unix/sysv/linux/bits/local_lim.h
@@ -78,7 +78,13 @@
#define AIO_PRIO_DELTA_MAX 20
/* Minimum size for a thread. We are free to choose a reasonable value. */
-#define PTHREAD_STACK_MIN 16384
+#undef PTHREAD_STACK_MIN
+#if defined __USE_DYNAMIC_STACK_SIZE && __USE_DYNAMIC_STACK_SIZE
+# include <unistd.h>
+# define PTHREAD_STACK_MIN sysconf (_SC_THREAD_STACK_MIN)
+#else
+# include <bits/pthread_stack_min.h>
+#endif
/* Maximum number of timer expiration overruns. */
#define DELAYTIMER_MAX 2147483647
diff --git a/sysdeps/unix/sysv/linux/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..7bd6fa1242
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN. Linux version.
+ Copyright (C) 2021 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/>. */
+
+/* Minimum size for a thread. We are free to choose a reasonable value. */
+#define PTHREAD_STACK_MIN 16384
diff --git a/sysdeps/unix/sysv/linux/bits/sigstksz.h b/sysdeps/unix/sysv/linux/bits/sigstksz.h
index 926508f2b4..cd45d122e0 100644
--- a/sysdeps/unix/sysv/linux/bits/sigstksz.h
+++ b/sysdeps/unix/sysv/linux/bits/sigstksz.h
@@ -20,7 +20,7 @@
# error "Never include <bits/sigstksz.h> directly; use <signal.h> instead."
#endif
-#if defined __USE_SC_SIGSTKSZ && __USE_SC_SIGSTKSZ
+#if defined __USE_DYNAMIC_STACK_SIZE && __USE_DYNAMIC_STACK_SIZE
# include <unistd.h>
/* Default stack size for a signal handler: sysconf (SC_SIGSTKSZ). */
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h b/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
deleted file mode 100644
index 7a9f677ec8..0000000000
--- a/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits. Linux/IA-64 version.
- Copyright (C) 1993-2021 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/>. */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
- and defines LINK_MAX although filesystems have different maxima. A
- similar thing is true for OPEN_MAX: the limit can be changed at
- runtime and therefore the macro must not be defined. Remove this
- after including the header if necessary. */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information. */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN? */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX? */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX? */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX? */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process. */
-#define _POSIX_THREAD_KEYS_MAX 128
-/* This is the value this implementation supports. */
-#define PTHREAD_KEYS_MAX 1024
-
-/* Controlling the iterations of destructors for thread-specific data. */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
-/* Number of iterations this implementation does. */
-#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process. */
-#define _POSIX_THREAD_THREADS_MAX 64
-/* We have no predefined limit on the number of threads. */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
- priority level. */
-#define AIO_PRIO_DELTA_MAX 20
-
-/* Minimum size for a thread. We are free to choose a reasonable value. */
-#define PTHREAD_STACK_MIN 196608
-
-/* Maximum number of timer expiration overruns. */
-#define DELAYTIMER_MAX 2147483647
-
-/* Maximum tty name length. */
-#define TTY_NAME_MAX 32
-
-/* Maximum login name length. This is arbitrary. */
-#define LOGIN_NAME_MAX 256
-
-/* Maximum host name length. */
-#define HOST_NAME_MAX 64
-
-/* Maximum message queue priority level. */
-#define MQ_PRIO_MAX 32768
-
-/* Maximum value the semaphore can have. */
-#define SEM_VALUE_MAX (2147483647)
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/ia64/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..73581506b2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN. Linux/IA-64 version.
+ Copyright (C) 2021 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/>. */
+
+/* Minimum size for a thread. We are free to choose a reasonable value. */
+#define PTHREAD_STACK_MIN 196608
diff --git a/sysdeps/unix/sysv/linux/mips/bits/local_lim.h b/sysdeps/unix/sysv/linux/mips/bits/local_lim.h
deleted file mode 100644
index a6a0d8a980..0000000000
--- a/sysdeps/unix/sysv/linux/mips/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits. MIPS Linux version.
- Copyright (C) 1993-2021 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/>. */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
- and defines LINK_MAX although filesystems have different maxima. A
- similar thing is true for OPEN_MAX: the limit can be changed at
- runtime and therefore the macro must not be defined. Remove this
- after including the header if necessary. */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information. */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN? */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX? */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX? */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX? */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process. */
-#define _POSIX_THREAD_KEYS_MAX 128
-/* This is the value this implementation supports. */
-#define PTHREAD_KEYS_MAX 1024
-
-/* Controlling the iterations of destructors for thread-specific data. */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
-/* Number of iterations this implementation does. */
-#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process. */
-#define _POSIX_THREAD_THREADS_MAX 64
-/* We have no predefined limit on the number of threads. */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
- priority level. */
-#define AIO_PRIO_DELTA_MAX 20
-
-/* Minimum size for a thread. At least two pages with 64k pages. */
-#define PTHREAD_STACK_MIN 131072
-
-/* Maximum number of timer expiration overruns. */
-#define DELAYTIMER_MAX 2147483647
-
-/* Maximum tty name length. */
-#define TTY_NAME_MAX 32
-
-/* Maximum login name length. This is arbitrary. */
-#define LOGIN_NAME_MAX 256
-
-/* Maximum host name length. */
-#define HOST_NAME_MAX 64
-
-/* Maximum message queue priority level. */
-#define MQ_PRIO_MAX 32768
-
-/* Maximum value the semaphore can have. */
-#define SEM_VALUE_MAX (2147483647)
diff --git a/sysdeps/unix/sysv/linux/mips/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/mips/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..132f1704a5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN. MIPS Linux version.
+ Copyright (C) 2021 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/>. */
+
+/* Minimum size for a thread. At least two pages with 64k pages. */
+#define PTHREAD_STACK_MIN 131072
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h b/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
deleted file mode 100644
index 6caa627506..0000000000
--- a/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/* Minimum guaranteed maximum values for system limits. Linux/PPC version.
- Copyright (C) 1993-2021 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; see the file COPYING.LIB. If
- not, see <https://www.gnu.org/licenses/>. */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
- and defines LINK_MAX although filesystems have different maxima. A
- similar thing is true for OPEN_MAX: the limit can be changed at
- runtime and therefore the macro must not be defined. Remove this
- after including the header if necessary. */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information. */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN? */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX? */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX? */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX? */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process. */
-#define _POSIX_THREAD_KEYS_MAX 128
-/* This is the value this implementation supports. */
-#define PTHREAD_KEYS_MAX 1024
-
-/* Controlling the iterations of destructors for thread-specific data. */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
-/* Number of iterations this implementation does. */
-#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process. */
-#define _POSIX_THREAD_THREADS_MAX 64
-/* We have no predefined limit on the number of threads. */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
- priority level. */
-#define AIO_PRIO_DELTA_MAX 20
-
-/* Minimum size for a thread. At least two pages for systems with 64k
- pages. */
-#define PTHREAD_STACK_MIN 131072
-
-/* Maximum number of timer expiration overruns. */
-#define DELAYTIMER_MAX 2147483647
-
-/* Maximum tty name length. */
-#define TTY_NAME_MAX 32
-
-/* Maximum login name length. This is arbitrary. */
-#define LOGIN_NAME_MAX 256
-
-/* Maximum host name length. */
-#define HOST_NAME_MAX 64
-
-/* Maximum message queue priority level. */
-#define MQ_PRIO_MAX 32768
-
-/* Maximum value the semaphore can have. */
-#define SEM_VALUE_MAX (2147483647)
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/powerpc/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..d7017e7b24
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/pthread_stack_min.h
@@ -0,0 +1,21 @@
+/* Definition of PTHREAD_STACK_MIN. Linux/PPC version.
+ Copyright (C) 2021 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; see the file COPYING.LIB. If
+ not, see <https://www.gnu.org/licenses/>. */
+
+/* Minimum size for a thread. At least two pages for systems with 64k
+ pages. */
+#define PTHREAD_STACK_MIN 131072
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h b/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
deleted file mode 100644
index 4a9a8c1325..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits. Linux/SPARC version.
- Copyright (C) 1993-2021 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, see <https://www.gnu.org/licenses/>. */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
- and defines LINK_MAX although filesystems have different maxima. A
- similar thing is true for OPEN_MAX: the limit can be changed at
- runtime and therefore the macro must not be defined. Remove this
- after including the header if necessary. */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information. */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN? */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX? */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX? */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX? */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process. */
-#define _POSIX_THREAD_KEYS_MAX 128
-/* This is the value this implementation supports. */
-#define PTHREAD_KEYS_MAX 1024
-
-/* Controlling the iterations of destructors for thread-specific data. */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
-/* Number of iterations this implementation does. */
-#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process. */
-#define _POSIX_THREAD_THREADS_MAX 64
-/* We have no predefined limit on the number of threads. */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
- priority level. */
-#define AIO_PRIO_DELTA_MAX 20
-
-/* Minimum size for a thread. We are free to choose a reasonable value. */
-#define PTHREAD_STACK_MIN 24576
-
-/* Maximum number of timer expiration overruns. */
-#define DELAYTIMER_MAX 2147483647
-
-/* Maximum tty name length. */
-#define TTY_NAME_MAX 32
-
-/* Maximum login name length. This is arbitrary. */
-#define LOGIN_NAME_MAX 256
-
-/* Maximum host name length. */
-#define HOST_NAME_MAX 64
-
-/* Maximum message queue priority level. */
-#define MQ_PRIO_MAX 32768
-
-/* Maximum value the semaphore can have. */
-#define SEM_VALUE_MAX (2147483647)
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/sparc/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..bcacedb73b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN. Linux/SPARC version.
+ Copyright (C) 2021 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, see <https://www.gnu.org/licenses/>. */
+
+/* Minimum size for a thread. We are free to choose a reasonable value. */
+#define PTHREAD_STACK_MIN 24576
diff --git a/sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h b/sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h
new file mode 100644
index 0000000000..9e0eb0f7fc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h
@@ -0,0 +1,39 @@
+/* __get_pthread_stack_min (). Linux version.
+ Copyright (C) 2021 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/>. */
+
+/* Return sysconf (_SC_THREAD_STACK_MIN). */
+
+static inline long int
+__get_pthread_stack_min (void)
+{
+ /* sysconf (_SC_THREAD_STACK_MIN) >= sysconf (_SC_MINSIGSTKSZ). */
+ long int pthread_stack_min = GLRO(dl_minsigstacksize);
+ assert (pthread_stack_min != 0);
+ _Static_assert (__builtin_constant_p (PTHREAD_STACK_MIN),
+ "PTHREAD_STACK_MIN is constant");
+ /* Return MAX (PTHREAD_STACK_MIN, pthread_stack_min). */
+ if (pthread_stack_min < PTHREAD_STACK_MIN)
+ pthread_stack_min = PTHREAD_STACK_MIN;
+ /* We have a private interface, __pthread_get_minstack@GLIBC_PRIVATE
+ which returns a larger size that includes the required TLS variable
+ space which has been determined at startup. For sysconf here we are
+ conservative and don't include the space required for TLS access.
+ Eventually the TLS variable space will not be part of the stack
+ (Bug 11787). */
+ return pthread_stack_min;
+}
--
2.31.1
next reply other threads:[~2021-07-09 21:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-09 21:09 H.J. Lu via Libc-alpha [this message]
2021-07-09 22:07 ` [PATCH v5] Define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN) Carlos O'Donell via Libc-alpha
2021-07-12 19:07 ` Maxim Kuvyrkov via Libc-alpha
2021-07-12 19:45 ` H.J. Lu via Libc-alpha
2021-07-12 19:50 ` Florian Weimer via Libc-alpha
2021-07-16 22:17 ` Khem Raj via Libc-alpha
2021-07-17 21:59 ` Carlos O'Donell via Libc-alpha
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