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* allocatestack.c (queue_stack): Move freeing of surplus stacks to...
(free_stacks): ...here. (__free_stack_cache): New function. * pthreadP.h: Declare __free_stack_cache. * sysdeps/pthread/pthread-functions.h (pthread_functions): Add ptr_freeres. * init.c (pthread_functions): Initialize ptr_freeres. * sysdeps/unix/sysv/linux/libc_pthread_init.c (freeres_libptread): New freeres function.
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@ -1,3 +1,15 @@
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2006-08-23 Ulrich Drepper <drepper@redhat.com>
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* allocatestack.c (queue_stack): Move freeing of surplus stacks to...
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(free_stacks): ...here.
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(__free_stack_cache): New function.
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* pthreadP.h: Declare __free_stack_cache.
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* sysdeps/pthread/pthread-functions.h (pthread_functions): Add
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ptr_freeres.
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* init.c (pthread_functions): Initialize ptr_freeres.
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* sysdeps/unix/sysv/linux/libc_pthread_init.c (freeres_libptread):
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New freeres function.
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2006-07-30 Joseph S. Myers <joseph@codesourcery.com>
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[BZ #3018]
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@ -211,6 +211,45 @@ get_cached_stack (size_t *sizep, void **memp)
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}
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/* Free stacks until cache size is lower than LIMIT. */
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static void
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free_stacks (size_t limit)
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{
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/* We reduce the size of the cache. Remove the last entries until
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the size is below the limit. */
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list_t *entry;
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list_t *prev;
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/* Search from the end of the list. */
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list_for_each_prev_safe (entry, prev, &stack_cache)
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{
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struct pthread *curr;
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curr = list_entry (entry, struct pthread, list);
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if (FREE_P (curr))
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{
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/* Unlink the block. */
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list_del (entry);
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/* Account for the freed memory. */
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stack_cache_actsize -= curr->stackblock_size;
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/* Free the memory associated with the ELF TLS. */
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_dl_deallocate_tls (TLS_TPADJ (curr), false);
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/* Remove this block. This should never fail. If it does
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something is really wrong. */
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if (munmap (curr->stackblock, curr->stackblock_size) != 0)
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abort ();
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/* Maybe we have freed enough. */
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if (stack_cache_actsize <= limit)
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break;
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}
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}
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}
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/* Add a stack frame which is not used anymore to the stack. Must be
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called with the cache lock held. */
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static inline void
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@ -224,40 +263,15 @@ queue_stack (struct pthread *stack)
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stack_cache_actsize += stack->stackblock_size;
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if (__builtin_expect (stack_cache_actsize > stack_cache_maxsize, 0))
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{
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/* We reduce the size of the cache. Remove the last entries
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until the size is below the limit. */
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list_t *entry;
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list_t *prev;
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free_stacks (stack_cache_maxsize);
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}
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/* Search from the end of the list. */
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list_for_each_prev_safe (entry, prev, &stack_cache)
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{
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struct pthread *curr;
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curr = list_entry (entry, struct pthread, list);
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if (FREE_P (curr))
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{
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/* Unlink the block. */
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list_del (entry);
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/* Account for the freed memory. */
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stack_cache_actsize -= curr->stackblock_size;
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/* Free the memory associated with the ELF TLS. */
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_dl_deallocate_tls (TLS_TPADJ (curr), false);
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/* Remove this block. This should never fail. If it
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does something is really wrong. */
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if (munmap (curr->stackblock, curr->stackblock_size) != 0)
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abort ();
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/* Maybe we have freed enough. */
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if (stack_cache_actsize <= stack_cache_maxsize)
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break;
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}
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}
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}
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/* This function is called indirectly from the freeres code in libc. */
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void
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__free_stack_cache (void)
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{
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free_stacks (0);
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}
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@ -136,7 +136,9 @@ static const struct pthread_functions pthread_functions =
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.ptr_nthreads = &__nptl_nthreads,
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.ptr___pthread_unwind = &__pthread_unwind,
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.ptr__nptl_deallocate_tsd = __nptl_deallocate_tsd,
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.ptr__nptl_setxid = __nptl_setxid
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.ptr__nptl_setxid = __nptl_setxid,
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/* For now only the stack cache needs to be freed. */
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.ptr_freeres = __free_stack_cache
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};
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# define ptr_pthread_functions &pthread_functions
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#else
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@ -543,6 +543,8 @@ extern void __nptl_deallocate_tsd (void) attribute_hidden;
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extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
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extern void __free_stack_cache (void) attribute_hidden;
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#ifdef SHARED
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# define PTHREAD_STATIC_FN_REQUIRE(name)
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#else
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@ -1,4 +1,4 @@
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/* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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/* Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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@ -95,6 +95,7 @@ struct pthread_functions
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__attribute ((noreturn)) __cleanup_fct_attribute;
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void (*ptr__nptl_deallocate_tsd) (void);
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int (*ptr__nptl_setxid) (struct xid_command *);
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void (*ptr_freeres) (void);
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};
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/* Variable in libc.so. */
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@ -1,4 +1,4 @@
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/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
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/* Copyright (C) 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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@ -57,3 +57,9 @@ __libc_pthread_init (ptr, reclaim, functions)
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return &__libc_multiple_threads;
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#endif
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}
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libc_freeres_fn (freeres_libptread)
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{
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__libc_pthread_functions.ptr_freeres ();
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}
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