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authorUlrich Drepper <drepper@redhat.com>2002-10-09 09:42:48 +0000
committerUlrich Drepper <drepper@redhat.com>2002-10-09 09:42:48 +0000
commit6166815d696407069c33c1f0cad76fb1847e4bc7 (patch)
treed7aaf5fd8551eb6d69fb80863a4a415cfaa9c01a /linuxthreads
parent4c2821faea94c4300fe283f13e4a667f1f73b90b (diff)
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Update.
2002-10-09 Ulrich Drepper <drepper@redhat.com> * Versions.def (libc): Add GLIBC_2.3.1. (libpthread): Add GLIBC_2.3.1. * include/signal.h: Add libc_hidden_proto for __sigwait, __sigwaitinfo, and __sigtimedwait. * signal/Versions: Add __sigtimedwait, __sigwait, and __sigwaitinfo. * sysdeps/unix/sysv/linux/sigtimedwait.c (__sigtimedwait): Add libc_hidden_def. * sysdeps/unix/sysv/linux/sigwait.c (__sigwait): Likewise. * sysdeps/unix/sysv/linux/sigwaitinfo.c (__sigwaitinfo): Likewise. * include/sys/msg.h: Declare __libc_msgrcv and __libc_msgsnd. * sysdeps/unix/sysv/linux/msgrcv.c (__msgrcv): Rename to __libc_msgrcv and make old name an alias. * sysdeps/unix/sysv/linux/msgsnd.c (__msgsnd): Rename to __libc_msgsnd and make old name an alias. * sysvipc/Versions (libc) [GLIBC_PRIVATE]: Add __libc_msgrcv and __libc_msgsnd. * include/sys/uio.h: Declare __libc_readv and __libc_writev. * misc/Versions (libc) [GLIBC_PRIVATE]: Add __libc_readv and __libc_writev. * sysdeps/generic/readv.c (__readv): Rename to __libc_readv and make old name an alias. * sysdeps/posix/readv.c: Likewise * sysdeps/unix/sysv/aix/readv.c: Likewise. * sysdeps/unix/sysv/linux/readv.c: Likewise. * sysdeps/generic/writev.c (__writev): Rename to __libc_writev and make old name an alias. * sysdeps/posix/writev.c: Likewise * sysdeps/unix/sysv/aix/writev.c: Likewise. * sysdeps/unix/sysv/linux/writev.c: Likewise. * include/sys/wait.h: Declare __waitid. * posix/Versions (libc) [GLIBC_PRIVATE]: Add __waitid. * sysdeps/generic/waitid.c (waitid): Rename to __waitid and make old name an alias. * sysdeps/posix/waitid.c: Likewise. * sysdeps/unix/sysv/aix/waitid.c: Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Add creat syscall. 2002-10-07 Jakub Jelinek <jakub@redhat.com> * include/alloca.h (__libc_use_alloca, __libc_alloca_cutoff): New prototypes. (__MAX_ALLOCA_CUTOFF): Define. Include allocalim.h. * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyname2_r, _nss_dns_gethostbyaddr_r): Use alloca or malloc to allocate host_buffer depending on __libc_use_alloca. * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyname_r, _nss_dns_getnetbyaddr_r): Use alloca or malloc to allocate net_buffer depending on __libc_use_alloca. * resolv/res_query.c (res_nquery): Use alloca or malloc to allocate buf depending on __libc_use_alloca. * resolv/gethnamaddr.c (gethostbyname2, gethostbyaddr): Likewise. * stdio-common/vfprintf.c (vfprintf): Use __libc_use_alloca instead of hardcoded constants. Pass proper size argument to alloca and compute end for wide char version. * stdio-common/printf_fp.c (__printf_fp): Use __libc_use_alloca instead of hardcoded constants. * string/strcoll.c (strcoll): Likewise. * string/strxfrm.c (strxfrm): Likewise. * sysdeps/posix/readv.c (__readv): Likewise. * sysdeps/posix/writev.c (__writev): Likewise. * sysdeps/generic/allocalim.h: New file.
Diffstat (limited to 'linuxthreads')
-rw-r--r--linuxthreads/Versions5
-rw-r--r--linuxthreads/descr.h2
-rw-r--r--linuxthreads/manager.c15
-rw-r--r--linuxthreads/no-tsd.c5
-rw-r--r--linuxthreads/pthread.c138
-rw-r--r--linuxthreads/specific.c6
-rw-r--r--linuxthreads/sysdeps/unix/sysv/linux/allocalim.h26
7 files changed, 87 insertions, 110 deletions
diff --git a/linuxthreads/Versions b/linuxthreads/Versions
index ec4e873..4e4c6cc 100644
--- a/linuxthreads/Versions
+++ b/linuxthreads/Versions
@@ -20,8 +20,7 @@ libc {
GLIBC_PRIVATE {
# Internal libc interface to libpthread
__libc_internal_tsd_get; __libc_internal_tsd_set;
- __libc_internal_tsd_address;
-
+ __libc_internal_tsd_address; __libc_alloca_cutoff;
}
}
@@ -163,7 +162,7 @@ libpthread {
GLIBC_PRIVATE {
# Internal libc interface to libpthread
__libc_internal_tsd_get; __libc_internal_tsd_set;
- __libc_internal_tsd_address;
+ __libc_internal_tsd_address; __libc_alloca_cutoff;
__pthread_kill_other_threads_np;
}
}
diff --git a/linuxthreads/descr.h b/linuxthreads/descr.h
index cc64cbc..1e14823 100644
--- a/linuxthreads/descr.h
+++ b/linuxthreads/descr.h
@@ -165,6 +165,8 @@ struct _pthread_descr_struct {
#ifdef USE_TLS
char *p_stackaddr; /* Stack address. */
#endif
+ size_t p_alloca_cutoff; /* Maximum size which should be allocated
+ using alloca() instead of malloc(). */
/* New elements must be added at the end. */
} __attribute__ ((aligned(32))); /* We need to align the structure so that
doubles are aligned properly. This is 8
diff --git a/linuxthreads/manager.c b/linuxthreads/manager.c
index 08bf467..cb9c33e 100644
--- a/linuxthreads/manager.c
+++ b/linuxthreads/manager.c
@@ -334,7 +334,8 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
char ** out_new_thread,
char ** out_new_thread_bottom,
char ** out_guardaddr,
- size_t * out_guardsize)
+ size_t * out_guardsize,
+ size_t * out_stacksize)
{
pthread_descr new_thread;
char * new_thread_bottom;
@@ -388,6 +389,7 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
/* Clear the thread data structure. */
memset (new_thread, '\0', sizeof (*new_thread));
#endif
+ stacksize = attr->__stacksize;
}
else
{
@@ -559,6 +561,11 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
*out_new_thread_bottom = new_thread_bottom;
*out_guardaddr = guardaddr;
*out_guardsize = guardsize;
+#ifdef NEED_SEPARATE_REGISTER_STACK
+ *out_stacksize = stacksize / 2;
+#else
+ *out_stacksize = stacksize;
+#endif
return 0;
}
@@ -575,7 +582,7 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
char * new_thread_bottom;
pthread_t new_thread_id;
char *guardaddr = NULL;
- size_t guardsize = 0;
+ size_t guardsize = 0, stksize = 0;
int pagesize = __getpagesize();
int saved_errno = 0;
@@ -608,7 +615,7 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
continue;
if (pthread_allocate_stack(attr, thread_segment(sseg),
pagesize, &stack_addr, &new_thread_bottom,
- &guardaddr, &guardsize) == 0)
+ &guardaddr, &guardsize, &stksize) == 0)
{
#ifdef USE_TLS
new_thread->p_stackaddr = stack_addr;
@@ -639,6 +646,8 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
new_thread->p_guardsize = guardsize;
new_thread->p_nr = sseg;
new_thread->p_inheritsched = attr ? attr->__inheritsched : 0;
+ new_thread->p_alloca_cutoff = stksize / 4 > __MAX_ALLOCA_CUTOFF
+ ? __MAX_ALLOCA_CUTOFF : stksize / 4;
/* Initialize the thread handle */
__pthread_init_lock(&__pthread_handles[sseg].h_lock);
__pthread_handles[sseg].h_descr = new_thread;
diff --git a/linuxthreads/no-tsd.c b/linuxthreads/no-tsd.c
index 099e7b4..de6c294 100644
--- a/linuxthreads/no-tsd.c
+++ b/linuxthreads/no-tsd.c
@@ -38,3 +38,8 @@ void **(*__libc_internal_tsd_address) (enum __libc_tsd_key_t)
__THROW __attribute__ ((__const__));
#endif /* !(USE_TLS && HAVE___THREAD) */
+
+int __libc_alloca_cutoff (size_t size)
+{
+ return size <= __MAX_ALLOCA_CUTOFF;
+}
diff --git a/linuxthreads/pthread.c b/linuxthreads/pthread.c
index 9281a41..e2042bd 100644
--- a/linuxthreads/pthread.c
+++ b/linuxthreads/pthread.c
@@ -63,58 +63,20 @@ static pthread_descr manager_thread;
/* Descriptor of the initial thread */
struct _pthread_descr_struct __pthread_initial_thread = {
- {
- {
- .self = &__pthread_initial_thread /* pthread_descr self */
- }
- },
- &__pthread_initial_thread, /* pthread_descr p_nextlive */
- &__pthread_initial_thread, /* pthread_descr p_prevlive */
- NULL, /* pthread_descr p_nextwaiting */
- NULL, /* pthread_descr p_nextlock */
- PTHREAD_THREADS_MAX, /* pthread_t p_tid */
- 0, /* int p_pid */
- 0, /* int p_priority */
- &__pthread_handles[0].h_lock, /* struct _pthread_fastlock * p_lock */
- 0, /* int p_signal */
- NULL, /* sigjmp_buf * p_signal_buf */
- NULL, /* sigjmp_buf * p_cancel_buf */
- 0, /* char p_terminated */
- 0, /* char p_detached */
- 0, /* char p_exited */
- NULL, /* void * p_retval */
- 0, /* int p_retval */
- NULL, /* pthread_descr p_joining */
- NULL, /* struct _pthread_cleanup_buffer * p_cleanup */
- 0, /* char p_cancelstate */
- 0, /* char p_canceltype */
- 0, /* char p_canceled */
- NULL, /* char * p_in_sighandler */
- 0, /* char p_sigwaiting */
- PTHREAD_START_ARGS_INITIALIZER(NULL),
- /* struct pthread_start_args p_start_args */
- {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */
- {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */
- &_errno, /* int *p_errnop */
- 0, /* int p_errno */
- &_h_errno, /* int *p_h_errnop */
- 0, /* int p_h_errno */
- &_res, /* struct __res_state *p_resp */
- {}, /* struct __res_state p_res */
- 1, /* int p_userstack */
- NULL, /* void * p_guardaddr */
- 0, /* size_t p_guardsize */
- 0, /* Always index 0 */
- 0, /* int p_report_events */
- {{{0, }}, 0, NULL}, /* td_eventbuf_t p_eventbuf */
- __ATOMIC_INITIALIZER, /* struct pthread_atomic p_resume_count */
- 0, /* char p_woken_by_cancel */
- 0, /* char p_condvar_avail */
- 0, /* char p_sem_avail */
- NULL, /* struct pthread_extricate_if *p_extricate */
- NULL, /* pthread_readlock_info *p_readlock_list; */
- NULL, /* pthread_readlock_info *p_readlock_free; */
- 0 /* int p_untracked_readlock_count; */
+ .p_header.data.self = &__pthread_initial_thread,
+ .p_nextlive = &__pthread_initial_thread,
+ .p_prevlive = &__pthread_initial_thread,
+ .p_tid = PTHREAD_THREADS_MAX,
+ .p_lock = &__pthread_handles[0].h_lock,
+ .p_start_args = PTHREAD_START_ARGS_INITIALIZER(NULL),
+#if !(USE_TLS && HAVE___THREAD)
+ .p_errnop = &_errno,
+ .p_h_errnop = &_h_errno,
+ .p_resp = &_res,
+#endif
+ .p_userstack = 1,
+ .p_resume_count = __ATOMIC_INITIALIZER,
+ .p_alloca_cutoff = __MAX_ALLOCA_CUTOFF
};
/* Descriptor of the manager thread; none of this is used but the error
@@ -123,58 +85,15 @@ struct _pthread_descr_struct __pthread_initial_thread = {
#define manager_thread (&__pthread_manager_thread)
struct _pthread_descr_struct __pthread_manager_thread = {
- {
- {
- .self = &__pthread_manager_thread /* pthread_descr self */
- }
- },
- NULL, /* pthread_descr p_nextlive */
- NULL, /* pthread_descr p_prevlive */
- NULL, /* pthread_descr p_nextwaiting */
- NULL, /* pthread_descr p_nextlock */
- 0, /* int p_tid */
- 0, /* int p_pid */
- 0, /* int p_priority */
- &__pthread_handles[1].h_lock, /* struct _pthread_fastlock * p_lock */
- 0, /* int p_signal */
- NULL, /* sigjmp_buf * p_signal_buf */
- NULL, /* sigjmp_buf * p_cancel_buf */
- 0, /* char p_terminated */
- 0, /* char p_detached */
- 0, /* char p_exited */
- NULL, /* void * p_retval */
- 0, /* int p_retval */
- NULL, /* pthread_descr p_joining */
- NULL, /* struct _pthread_cleanup_buffer * p_cleanup */
- 0, /* char p_cancelstate */
- 0, /* char p_canceltype */
- 0, /* char p_canceled */
- NULL, /* char * p_in_sighandler */
- 0, /* char p_sigwaiting */
- PTHREAD_START_ARGS_INITIALIZER(__pthread_manager),
- /* struct pthread_start_args p_start_args */
- {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */
- {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */
- &__pthread_manager_thread.p_errno, /* int *p_errnop */
- 0, /* int p_errno */
- NULL, /* int *p_h_errnop */
- 0, /* int p_h_errno */
- NULL, /* struct __res_state *p_resp */
- {}, /* struct __res_state p_res */
- 0, /* int p_userstack */
- NULL, /* void * p_guardaddr */
- 0, /* size_t p_guardsize */
- 1, /* Always index 1 */
- 0, /* int p_report_events */
- {{{0, }}, 0, NULL}, /* td_eventbuf_t p_eventbuf */
- __ATOMIC_INITIALIZER, /* struct pthread_atomic p_resume_count */
- 0, /* char p_woken_by_cancel */
- 0, /* char p_condvar_avail */
- 0, /* char p_sem_avail */
- NULL, /* struct pthread_extricate_if *p_extricate */
- NULL, /* pthread_readlock_info *p_readlock_list; */
- NULL, /* pthread_readlock_info *p_readlock_free; */
- 0 /* int p_untracked_readlock_count; */
+ .p_header.data.self = &__pthread_manager_thread,
+ .p_lock = &__pthread_handles[1].h_lock,
+ .p_start_args = PTHREAD_START_ARGS_INITIALIZER(__pthread_manager),
+#if !(USE_TLS && HAVE___THREAD)
+ .p_errnop = &__pthread_manager_thread.p_errno,
+#endif
+ .p_nr = 1,
+ .p_resume_count = __ATOMIC_INITIALIZER,
+ .p_alloca_cutoff = PTHREAD_STACK_MIN / 4
};
#endif
@@ -418,6 +337,7 @@ __pthread_initialize_minimal(void)
# if __LT_SPINLOCK_INIT != 0
self->p_resume_count = (struct pthread_atomic) __ATOMIC_INITIALIZER;
# endif
+ self->p_alloca_cutoff = __MAX_ALLOCA_CUTOFF;
/* Another variable which points to the thread descriptor. */
__pthread_main_thread = self;
@@ -487,6 +407,15 @@ __pthread_init_max_stacksize(void)
}
#endif
__pthread_max_stacksize = max_stack;
+ if (max_stack / 4 < __MAX_ALLOCA_CUTOFF)
+ {
+#ifdef USE_TLS
+ pthread_descr self = THREAD_SELF;
+ self->p_alloca_cutoff = max_stack / 4;
+#else
+ __pthread_initial_thread.p_alloca_cutoff = max_stack / 4;
+#endif
+ }
}
@@ -629,6 +558,7 @@ int __pthread_initialize_manager(void)
# if __LT_SPINLOCK_INIT != 0
self->p_resume_count = (struct pthread_atomic) __ATOMIC_INITIALIZER;
# endif
+ tcb->p_alloca_cutoff = PTHREAD_STACK_MIN / 4;
#else
tcb = &__pthread_manager_thread;
#endif
diff --git a/linuxthreads/specific.c b/linuxthreads/specific.c
index c5d742d..17e62e8 100644
--- a/linuxthreads/specific.c
+++ b/linuxthreads/specific.c
@@ -239,3 +239,9 @@ void **(*const __libc_internal_tsd_address) (enum __libc_tsd_key_t key)
__THROW __attribute__ ((__const__)) = libc_internal_tsd_address;
#endif
+
+int __libc_alloca_cutoff (size_t size)
+{
+ pthread_descr self = thread_self();
+ return size <= THREAD_GETMEM_NC(self, p_alloca_cutoff);
+}
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/allocalim.h b/linuxthreads/sysdeps/unix/sysv/linux/allocalim.h
new file mode 100644
index 0000000..f62f7d6
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/allocalim.h
@@ -0,0 +1,26 @@
+/* Determine whether block of given size can be allocated on the stack or not.
+ Copyright (C) 2002 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,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <limits.h>
+
+extern inline int __libc_use_alloca (size_t size)
+{
+ return (__builtin_expect (size <= PTHREAD_STACK_MIN / 4, 1)
+ || __libc_alloca_cutoff (size));
+}