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gcc/libgomp/allocator.c
Tobias Burnus 8f3c4517b1 libgomp: call numa_available first when using libnuma 
The documentation requires that numa_available() is called and only
when successful, other libnuma function may be called. Internally,
it does a syscall to get_mempolicy with flag=0 (which would return
the default policy if mode were not NULL). If this returns -1 (and
not 0) and errno == ENOSYS, the Linux kernel does not have the
get_mempolicy syscall function; if so, numa_available() returns -1
(otherwise: 0).

libgomp/

	PR libgomp/111024
	* allocator.c (gomp_init_libnuma): Call numa_available; if
	not available or not returning 0, disable libnuma usage.
2023-08-17 15:20:55 +02:00

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/* Copyright (C) 2020-2023 Free Software Foundation, Inc.
Contributed by Jakub Jelinek <jakub@redhat.com>.
This file is part of the GNU Offloading and Multi Processing Library
(libgomp).
Libgomp is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Libgomp 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 General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* This file contains wrappers for the system allocation routines. Most
places in the OpenMP API do not make any provision for failure, so in
general we cannot allow memory allocation to fail. */
#define _GNU_SOURCE
#include "libgomp.h"
#include <stdlib.h>
#include <string.h>
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
#include <dlfcn.h>
#endif
#define omp_max_predefined_alloc omp_thread_mem_alloc
enum gomp_numa_memkind_kind
{
GOMP_MEMKIND_NONE = 0,
#define GOMP_MEMKIND_KINDS \
GOMP_MEMKIND_KIND (HBW_INTERLEAVE), \
GOMP_MEMKIND_KIND (HBW_PREFERRED), \
GOMP_MEMKIND_KIND (DAX_KMEM_ALL), \
GOMP_MEMKIND_KIND (DAX_KMEM), \
GOMP_MEMKIND_KIND (INTERLEAVE), \
GOMP_MEMKIND_KIND (DEFAULT)
#define GOMP_MEMKIND_KIND(kind) GOMP_MEMKIND_##kind
GOMP_MEMKIND_KINDS,
#undef GOMP_MEMKIND_KIND
GOMP_MEMKIND_COUNT,
GOMP_MEMKIND_LIBNUMA = GOMP_MEMKIND_COUNT
};
struct omp_allocator_data
{
omp_memspace_handle_t memspace;
omp_uintptr_t alignment;
omp_uintptr_t pool_size;
omp_uintptr_t used_pool_size;
omp_allocator_handle_t fb_data;
unsigned int sync_hint : 8;
unsigned int access : 8;
unsigned int fallback : 8;
unsigned int pinned : 1;
unsigned int partition : 7;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
unsigned int memkind : 8;
#endif
#ifndef HAVE_SYNC_BUILTINS
gomp_mutex_t lock;
#endif
};
struct omp_mem_header
{
void *ptr;
size_t size;
omp_allocator_handle_t allocator;
void *pad;
};
struct gomp_libnuma_data
{
void *numa_handle;
void *(*numa_alloc_local) (size_t);
void *(*numa_realloc) (void *, size_t, size_t);
void (*numa_free) (void *, size_t);
};
struct gomp_memkind_data
{
void *memkind_handle;
void *(*memkind_malloc) (void *, size_t);
void *(*memkind_calloc) (void *, size_t, size_t);
void *(*memkind_realloc) (void *, void *, size_t);
void (*memkind_free) (void *, void *);
int (*memkind_check_available) (void *);
void **kinds[GOMP_MEMKIND_COUNT];
};
#ifdef LIBGOMP_USE_LIBNUMA
static struct gomp_libnuma_data *libnuma_data;
static pthread_once_t libnuma_data_once = PTHREAD_ONCE_INIT;
static void
gomp_init_libnuma (void)
{
void *handle = dlopen ("libnuma.so.1", RTLD_LAZY);
struct gomp_libnuma_data *data;
data = calloc (1, sizeof (struct gomp_libnuma_data));
if (data == NULL)
{
if (handle)
dlclose (handle);
return;
}
if (handle)
{
int (*numa_available) (void);
numa_available
= (__typeof (numa_available)) dlsym (handle, "numa_available");
if (!numa_available || numa_available () != 0)
{
dlclose (handle);
handle = NULL;
}
}
if (!handle)
{
__atomic_store_n (&libnuma_data, data, MEMMODEL_RELEASE);
return;
}
data->numa_handle = handle;
data->numa_alloc_local
= (__typeof (data->numa_alloc_local)) dlsym (handle, "numa_alloc_local");
data->numa_realloc
= (__typeof (data->numa_realloc)) dlsym (handle, "numa_realloc");
data->numa_free
= (__typeof (data->numa_free)) dlsym (handle, "numa_free");
__atomic_store_n (&libnuma_data, data, MEMMODEL_RELEASE);
}
static struct gomp_libnuma_data *
gomp_get_libnuma (void)
{
struct gomp_libnuma_data *data
= __atomic_load_n (&libnuma_data, MEMMODEL_ACQUIRE);
if (data)
return data;
pthread_once (&libnuma_data_once, gomp_init_libnuma);
return __atomic_load_n (&libnuma_data, MEMMODEL_ACQUIRE);
}
#endif
#ifdef LIBGOMP_USE_MEMKIND
static struct gomp_memkind_data *memkind_data;
static pthread_once_t memkind_data_once = PTHREAD_ONCE_INIT;
static void
gomp_init_memkind (void)
{
void *handle = dlopen ("libmemkind.so.0", RTLD_LAZY);
struct gomp_memkind_data *data;
int i;
static const char *kinds[] = {
NULL,
#define GOMP_MEMKIND_KIND(kind) "MEMKIND_" #kind
GOMP_MEMKIND_KINDS
#undef GOMP_MEMKIND_KIND
};
data = calloc (1, sizeof (struct gomp_memkind_data));
if (data == NULL)
{
if (handle)
dlclose (handle);
return;
}
if (!handle)
{
__atomic_store_n (&memkind_data, data, MEMMODEL_RELEASE);
return;
}
data->memkind_handle = handle;
data->memkind_malloc
= (__typeof (data->memkind_malloc)) dlsym (handle, "memkind_malloc");
data->memkind_calloc
= (__typeof (data->memkind_calloc)) dlsym (handle, "memkind_calloc");
data->memkind_realloc
= (__typeof (data->memkind_realloc)) dlsym (handle, "memkind_realloc");
data->memkind_free
= (__typeof (data->memkind_free)) dlsym (handle, "memkind_free");
data->memkind_check_available
= (__typeof (data->memkind_check_available))
dlsym (handle, "memkind_check_available");
if (data->memkind_malloc
&& data->memkind_calloc
&& data->memkind_realloc
&& data->memkind_free
&& data->memkind_check_available)
for (i = 1; i < GOMP_MEMKIND_COUNT; ++i)
{
data->kinds[i] = (void **) dlsym (handle, kinds[i]);
if (data->kinds[i] && data->memkind_check_available (*data->kinds[i]))
data->kinds[i] = NULL;
}
__atomic_store_n (&memkind_data, data, MEMMODEL_RELEASE);
}
static struct gomp_memkind_data *
gomp_get_memkind (void)
{
struct gomp_memkind_data *data
= __atomic_load_n (&memkind_data, MEMMODEL_ACQUIRE);
if (data)
return data;
pthread_once (&memkind_data_once, gomp_init_memkind);
return __atomic_load_n (&memkind_data, MEMMODEL_ACQUIRE);
}
#endif
omp_allocator_handle_t
omp_init_allocator (omp_memspace_handle_t memspace, int ntraits,
const omp_alloctrait_t traits[])
{
struct omp_allocator_data data
= { memspace, 1, ~(uintptr_t) 0, 0, 0, omp_atv_contended, omp_atv_all,
omp_atv_default_mem_fb, omp_atv_false, omp_atv_environment,
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
GOMP_MEMKIND_NONE
#endif
};
struct omp_allocator_data *ret;
int i;
if (memspace > omp_low_lat_mem_space)
return omp_null_allocator;
for (i = 0; i < ntraits; i++)
switch (traits[i].key)
{
case omp_atk_sync_hint:
switch (traits[i].value)
{
case omp_atv_default:
data.sync_hint = omp_atv_contended;
break;
case omp_atv_contended:
case omp_atv_uncontended:
case omp_atv_serialized:
case omp_atv_private:
data.sync_hint = traits[i].value;
break;
default:
return omp_null_allocator;
}
break;
case omp_atk_alignment:
if (traits[i].value == omp_atv_default)
{
data.alignment = 1;
break;
}
if ((traits[i].value & (traits[i].value - 1)) != 0
|| !traits[i].value)
return omp_null_allocator;
data.alignment = traits[i].value;
break;
case omp_atk_access:
switch (traits[i].value)
{
case omp_atv_default:
data.access = omp_atv_all;
break;
case omp_atv_all:
case omp_atv_cgroup:
case omp_atv_pteam:
case omp_atv_thread:
data.access = traits[i].value;
break;
default:
return omp_null_allocator;
}
break;
case omp_atk_pool_size:
if (traits[i].value == omp_atv_default)
data.pool_size = ~(uintptr_t) 0;
else
data.pool_size = traits[i].value;
break;
case omp_atk_fallback:
switch (traits[i].value)
{
case omp_atv_default:
data.fallback = omp_atv_default_mem_fb;
break;
case omp_atv_default_mem_fb:
case omp_atv_null_fb:
case omp_atv_abort_fb:
case omp_atv_allocator_fb:
data.fallback = traits[i].value;
break;
default:
return omp_null_allocator;
}
break;
case omp_atk_fb_data:
data.fb_data = traits[i].value;
break;
case omp_atk_pinned:
switch (traits[i].value)
{
case omp_atv_default:
case omp_atv_false:
data.pinned = omp_atv_false;
break;
case omp_atv_true:
data.pinned = omp_atv_true;
break;
default:
return omp_null_allocator;
}
break;
case omp_atk_partition:
switch (traits[i].value)
{
case omp_atv_default:
data.partition = omp_atv_environment;
break;
case omp_atv_environment:
case omp_atv_nearest:
case omp_atv_blocked:
case omp_atv_interleaved:
data.partition = traits[i].value;
break;
default:
return omp_null_allocator;
}
break;
default:
return omp_null_allocator;
}
if (data.alignment < sizeof (void *))
data.alignment = sizeof (void *);
switch (memspace)
{
#ifdef LIBGOMP_USE_MEMKIND
case omp_high_bw_mem_space:
struct gomp_memkind_data *memkind_data;
memkind_data = gomp_get_memkind ();
if (data.partition == omp_atv_interleaved
&& memkind_data->kinds[GOMP_MEMKIND_HBW_INTERLEAVE])
{
data.memkind = GOMP_MEMKIND_HBW_INTERLEAVE;
break;
}
else if (memkind_data->kinds[GOMP_MEMKIND_HBW_PREFERRED])
{
data.memkind = GOMP_MEMKIND_HBW_PREFERRED;
break;
}
break;
case omp_large_cap_mem_space:
memkind_data = gomp_get_memkind ();
if (memkind_data->kinds[GOMP_MEMKIND_DAX_KMEM_ALL])
data.memkind = GOMP_MEMKIND_DAX_KMEM_ALL;
else if (memkind_data->kinds[GOMP_MEMKIND_DAX_KMEM])
data.memkind = GOMP_MEMKIND_DAX_KMEM;
break;
#endif
default:
#ifdef LIBGOMP_USE_MEMKIND
if (data.partition == omp_atv_interleaved)
{
memkind_data = gomp_get_memkind ();
if (memkind_data->kinds[GOMP_MEMKIND_INTERLEAVE])
data.memkind = GOMP_MEMKIND_INTERLEAVE;
}
#endif
break;
}
#ifdef LIBGOMP_USE_LIBNUMA
if (data.memkind == GOMP_MEMKIND_NONE && data.partition == omp_atv_nearest)
{
libnuma_data = gomp_get_libnuma ();
if (libnuma_data->numa_alloc_local != NULL)
data.memkind = GOMP_MEMKIND_LIBNUMA;
}
#endif
/* No support for this so far. */
if (data.pinned)
return omp_null_allocator;
ret = gomp_malloc (sizeof (struct omp_allocator_data));
*ret = data;
#ifndef HAVE_SYNC_BUILTINS
gomp_mutex_init (&ret->lock);
#endif
return (omp_allocator_handle_t) ret;
}
void
omp_destroy_allocator (omp_allocator_handle_t allocator)
{
if (allocator != omp_null_allocator)
{
#ifndef HAVE_SYNC_BUILTINS
gomp_mutex_destroy (&((struct omp_allocator_data *) allocator)->lock);
#endif
free ((void *) allocator);
}
}
ialias (omp_init_allocator)
ialias (omp_destroy_allocator)
void *
omp_aligned_alloc (size_t alignment, size_t size,
omp_allocator_handle_t allocator)
{
struct omp_allocator_data *allocator_data;
size_t new_size, new_alignment;
void *ptr, *ret;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
enum gomp_numa_memkind_kind memkind;
#endif
if (__builtin_expect (size == 0, 0))
return NULL;
retry:
new_alignment = alignment;
if (allocator == omp_null_allocator)
{
struct gomp_thread *thr = gomp_thread ();
if (thr->ts.def_allocator == omp_null_allocator)
thr->ts.def_allocator = gomp_def_allocator;
allocator = (omp_allocator_handle_t) thr->ts.def_allocator;
}
if (allocator > omp_max_predefined_alloc)
{
allocator_data = (struct omp_allocator_data *) allocator;
if (new_alignment < allocator_data->alignment)
new_alignment = allocator_data->alignment;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
memkind = allocator_data->memkind;
#endif
}
else
{
allocator_data = NULL;
if (new_alignment < sizeof (void *))
new_alignment = sizeof (void *);
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
memkind = GOMP_MEMKIND_NONE;
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (allocator == omp_high_bw_mem_alloc)
memkind = GOMP_MEMKIND_HBW_PREFERRED;
else if (allocator == omp_large_cap_mem_alloc)
memkind = GOMP_MEMKIND_DAX_KMEM_ALL;
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
if (!memkind_data->kinds[memkind])
memkind = GOMP_MEMKIND_NONE;
}
#endif
}
new_size = sizeof (struct omp_mem_header);
if (new_alignment > sizeof (void *))
new_size += new_alignment - sizeof (void *);
if (__builtin_add_overflow (size, new_size, &new_size))
goto fail;
if (__builtin_expect (allocator_data
&& allocator_data->pool_size < ~(uintptr_t) 0, 0))
{
uintptr_t used_pool_size;
if (new_size > allocator_data->pool_size)
goto fail;
#ifdef HAVE_SYNC_BUILTINS
used_pool_size = __atomic_load_n (&allocator_data->used_pool_size,
MEMMODEL_RELAXED);
do
{
uintptr_t new_pool_size;
if (__builtin_add_overflow (used_pool_size, new_size,
&new_pool_size)
|| new_pool_size > allocator_data->pool_size)
goto fail;
if (__atomic_compare_exchange_n (&allocator_data->used_pool_size,
&used_pool_size, new_pool_size,
true, MEMMODEL_RELAXED,
MEMMODEL_RELAXED))
break;
}
while (1);
#else
gomp_mutex_lock (&allocator_data->lock);
if (__builtin_add_overflow (allocator_data->used_pool_size, new_size,
&used_pool_size)
|| used_pool_size > allocator_data->pool_size)
{
gomp_mutex_unlock (&allocator_data->lock);
goto fail;
}
allocator_data->used_pool_size = used_pool_size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
ptr = libnuma_data->numa_alloc_local (new_size);
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
ptr = memkind_data->memkind_malloc (kind, new_size);
}
else
#endif
ptr = malloc (new_size);
if (ptr == NULL)
{
#ifdef HAVE_SYNC_BUILTINS
__atomic_add_fetch (&allocator_data->used_pool_size, -new_size,
MEMMODEL_RELAXED);
#else
gomp_mutex_lock (&allocator_data->lock);
allocator_data->used_pool_size -= new_size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
goto fail;
}
}
else
{
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
ptr = libnuma_data->numa_alloc_local (new_size);
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
ptr = memkind_data->memkind_malloc (kind, new_size);
}
else
#endif
ptr = malloc (new_size);
if (ptr == NULL)
goto fail;
}
if (new_alignment > sizeof (void *))
ret = (void *) (((uintptr_t) ptr
+ sizeof (struct omp_mem_header)
+ new_alignment - sizeof (void *))
& ~(new_alignment - 1));
else
ret = (char *) ptr + sizeof (struct omp_mem_header);
((struct omp_mem_header *) ret)[-1].ptr = ptr;
((struct omp_mem_header *) ret)[-1].size = new_size;
((struct omp_mem_header *) ret)[-1].allocator = allocator;
return ret;
fail:
if (allocator_data)
{
switch (allocator_data->fallback)
{
case omp_atv_default_mem_fb:
if ((new_alignment > sizeof (void *) && new_alignment > alignment)
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
|| memkind
#endif
|| (allocator_data
&& allocator_data->pool_size < ~(uintptr_t) 0))
{
allocator = omp_default_mem_alloc;
goto retry;
}
/* Otherwise, we've already performed default mem allocation
and if that failed, it won't succeed again (unless it was
intermittent. Return NULL then, as that is the fallback. */
break;
case omp_atv_null_fb:
break;
default:
case omp_atv_abort_fb:
gomp_fatal ("Out of memory allocating %lu bytes",
(unsigned long) size);
case omp_atv_allocator_fb:
allocator = allocator_data->fb_data;
goto retry;
}
}
return NULL;
}
ialias (omp_aligned_alloc)
void *
omp_alloc (size_t size, omp_allocator_handle_t allocator)
{
return ialias_call (omp_aligned_alloc) (1, size, allocator);
}
/* Like omp_aligned_alloc, but apply on top of that:
"For allocations that arise from this ... the null_fb value of the
fallback allocator trait behaves as if the abort_fb had been specified." */
void *
GOMP_alloc (size_t alignment, size_t size, uintptr_t allocator)
{
void *ret
= ialias_call (omp_aligned_alloc) (alignment, size,
(omp_allocator_handle_t) allocator);
if (__builtin_expect (ret == NULL, 0) && size)
gomp_fatal ("Out of memory allocating %lu bytes",
(unsigned long) size);
return ret;
}
void
omp_free (void *ptr, omp_allocator_handle_t allocator)
{
struct omp_mem_header *data;
if (ptr == NULL)
return;
(void) allocator;
data = &((struct omp_mem_header *) ptr)[-1];
if (data->allocator > omp_max_predefined_alloc)
{
struct omp_allocator_data *allocator_data
= (struct omp_allocator_data *) (data->allocator);
if (allocator_data->pool_size < ~(uintptr_t) 0)
{
#ifdef HAVE_SYNC_BUILTINS
__atomic_add_fetch (&allocator_data->used_pool_size, -data->size,
MEMMODEL_RELAXED);
#else
gomp_mutex_lock (&allocator_data->lock);
allocator_data->used_pool_size -= data->size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
}
#ifdef LIBGOMP_USE_LIBNUMA
if (allocator_data->memkind == GOMP_MEMKIND_LIBNUMA)
{
libnuma_data->numa_free (data->ptr, data->size);
return;
}
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (allocator_data->memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[allocator_data->memkind];
memkind_data->memkind_free (kind, data->ptr);
return;
}
#endif
}
#ifdef LIBGOMP_USE_MEMKIND
else
{
enum gomp_numa_memkind_kind memkind = GOMP_MEMKIND_NONE;
if (data->allocator == omp_high_bw_mem_alloc)
memkind = GOMP_MEMKIND_HBW_PREFERRED;
else if (data->allocator == omp_large_cap_mem_alloc)
memkind = GOMP_MEMKIND_DAX_KMEM_ALL;
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
if (memkind_data->kinds[memkind])
{
void *kind = *memkind_data->kinds[memkind];
memkind_data->memkind_free (kind, data->ptr);
return;
}
}
}
#endif
free (data->ptr);
}
ialias (omp_free)
void
GOMP_free (void *ptr, uintptr_t allocator)
{
return ialias_call (omp_free) (ptr, (omp_allocator_handle_t) allocator);
}
void *
omp_aligned_calloc (size_t alignment, size_t nmemb, size_t size,
omp_allocator_handle_t allocator)
{
struct omp_allocator_data *allocator_data;
size_t new_size, size_temp, new_alignment;
void *ptr, *ret;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
enum gomp_numa_memkind_kind memkind;
#endif
if (__builtin_expect (size == 0 || nmemb == 0, 0))
return NULL;
retry:
new_alignment = alignment;
if (allocator == omp_null_allocator)
{
struct gomp_thread *thr = gomp_thread ();
if (thr->ts.def_allocator == omp_null_allocator)
thr->ts.def_allocator = gomp_def_allocator;
allocator = (omp_allocator_handle_t) thr->ts.def_allocator;
}
if (allocator > omp_max_predefined_alloc)
{
allocator_data = (struct omp_allocator_data *) allocator;
if (new_alignment < allocator_data->alignment)
new_alignment = allocator_data->alignment;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
memkind = allocator_data->memkind;
#endif
}
else
{
allocator_data = NULL;
if (new_alignment < sizeof (void *))
new_alignment = sizeof (void *);
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
memkind = GOMP_MEMKIND_NONE;
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (allocator == omp_high_bw_mem_alloc)
memkind = GOMP_MEMKIND_HBW_PREFERRED;
else if (allocator == omp_large_cap_mem_alloc)
memkind = GOMP_MEMKIND_DAX_KMEM_ALL;
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
if (!memkind_data->kinds[memkind])
memkind = GOMP_MEMKIND_NONE;
}
#endif
}
new_size = sizeof (struct omp_mem_header);
if (new_alignment > sizeof (void *))
new_size += new_alignment - sizeof (void *);
if (__builtin_mul_overflow (size, nmemb, &size_temp))
goto fail;
if (__builtin_add_overflow (size_temp, new_size, &new_size))
goto fail;
if (__builtin_expect (allocator_data
&& allocator_data->pool_size < ~(uintptr_t) 0, 0))
{
uintptr_t used_pool_size;
if (new_size > allocator_data->pool_size)
goto fail;
#ifdef HAVE_SYNC_BUILTINS
used_pool_size = __atomic_load_n (&allocator_data->used_pool_size,
MEMMODEL_RELAXED);
do
{
uintptr_t new_pool_size;
if (__builtin_add_overflow (used_pool_size, new_size,
&new_pool_size)
|| new_pool_size > allocator_data->pool_size)
goto fail;
if (__atomic_compare_exchange_n (&allocator_data->used_pool_size,
&used_pool_size, new_pool_size,
true, MEMMODEL_RELAXED,
MEMMODEL_RELAXED))
break;
}
while (1);
#else
gomp_mutex_lock (&allocator_data->lock);
if (__builtin_add_overflow (allocator_data->used_pool_size, new_size,
&used_pool_size)
|| used_pool_size > allocator_data->pool_size)
{
gomp_mutex_unlock (&allocator_data->lock);
goto fail;
}
allocator_data->used_pool_size = used_pool_size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
/* numa_alloc_local uses mmap with MAP_ANONYMOUS, returning
memory that is initialized to zero. */
ptr = libnuma_data->numa_alloc_local (new_size);
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
ptr = memkind_data->memkind_calloc (kind, 1, new_size);
}
else
#endif
ptr = calloc (1, new_size);
if (ptr == NULL)
{
#ifdef HAVE_SYNC_BUILTINS
__atomic_add_fetch (&allocator_data->used_pool_size, -new_size,
MEMMODEL_RELAXED);
#else
gomp_mutex_lock (&allocator_data->lock);
allocator_data->used_pool_size -= new_size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
goto fail;
}
}
else
{
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
/* numa_alloc_local uses mmap with MAP_ANONYMOUS, returning
memory that is initialized to zero. */
ptr = libnuma_data->numa_alloc_local (new_size);
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
ptr = memkind_data->memkind_calloc (kind, 1, new_size);
}
else
#endif
ptr = calloc (1, new_size);
if (ptr == NULL)
goto fail;
}
if (new_alignment > sizeof (void *))
ret = (void *) (((uintptr_t) ptr
+ sizeof (struct omp_mem_header)
+ new_alignment - sizeof (void *))
& ~(new_alignment - 1));
else
ret = (char *) ptr + sizeof (struct omp_mem_header);
((struct omp_mem_header *) ret)[-1].ptr = ptr;
((struct omp_mem_header *) ret)[-1].size = new_size;
((struct omp_mem_header *) ret)[-1].allocator = allocator;
return ret;
fail:
if (allocator_data)
{
switch (allocator_data->fallback)
{
case omp_atv_default_mem_fb:
if ((new_alignment > sizeof (void *) && new_alignment > alignment)
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
|| memkind
#endif
|| (allocator_data
&& allocator_data->pool_size < ~(uintptr_t) 0))
{
allocator = omp_default_mem_alloc;
goto retry;
}
/* Otherwise, we've already performed default mem allocation
and if that failed, it won't succeed again (unless it was
intermittent. Return NULL then, as that is the fallback. */
break;
case omp_atv_null_fb:
break;
default:
case omp_atv_abort_fb:
gomp_fatal ("Out of memory allocating %lu bytes",
(unsigned long) (size * nmemb));
case omp_atv_allocator_fb:
allocator = allocator_data->fb_data;
goto retry;
}
}
return NULL;
}
ialias (omp_aligned_calloc)
void *
omp_calloc (size_t nmemb, size_t size, omp_allocator_handle_t allocator)
{
return ialias_call (omp_aligned_calloc) (1, nmemb, size, allocator);
}
void *
omp_realloc (void *ptr, size_t size, omp_allocator_handle_t allocator,
omp_allocator_handle_t free_allocator)
{
struct omp_allocator_data *allocator_data, *free_allocator_data;
size_t new_size, old_size, new_alignment, old_alignment;
void *new_ptr, *ret;
struct omp_mem_header *data;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
enum gomp_numa_memkind_kind memkind, free_memkind;
#endif
if (__builtin_expect (ptr == NULL, 0))
return ialias_call (omp_aligned_alloc) (1, size, allocator);
if (__builtin_expect (size == 0, 0))
{
ialias_call (omp_free) (ptr, free_allocator);
return NULL;
}
data = &((struct omp_mem_header *) ptr)[-1];
free_allocator = data->allocator;
retry:
new_alignment = sizeof (void *);
if (allocator == omp_null_allocator)
allocator = free_allocator;
if (allocator > omp_max_predefined_alloc)
{
allocator_data = (struct omp_allocator_data *) allocator;
if (new_alignment < allocator_data->alignment)
new_alignment = allocator_data->alignment;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
memkind = allocator_data->memkind;
#endif
}
else
{
allocator_data = NULL;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
memkind = GOMP_MEMKIND_NONE;
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (allocator == omp_high_bw_mem_alloc)
memkind = GOMP_MEMKIND_HBW_PREFERRED;
else if (allocator == omp_large_cap_mem_alloc)
memkind = GOMP_MEMKIND_DAX_KMEM_ALL;
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
if (!memkind_data->kinds[memkind])
memkind = GOMP_MEMKIND_NONE;
}
#endif
}
if (free_allocator > omp_max_predefined_alloc)
{
free_allocator_data = (struct omp_allocator_data *) free_allocator;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
free_memkind = free_allocator_data->memkind;
#endif
}
else
{
free_allocator_data = NULL;
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
free_memkind = GOMP_MEMKIND_NONE;
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (free_allocator == omp_high_bw_mem_alloc)
free_memkind = GOMP_MEMKIND_HBW_PREFERRED;
else if (free_allocator == omp_large_cap_mem_alloc)
free_memkind = GOMP_MEMKIND_DAX_KMEM_ALL;
if (free_memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
if (!memkind_data->kinds[free_memkind])
free_memkind = GOMP_MEMKIND_NONE;
}
#endif
}
old_alignment = (uintptr_t) ptr - (uintptr_t) (data->ptr);
new_size = sizeof (struct omp_mem_header);
if (new_alignment > sizeof (void *))
new_size += new_alignment - sizeof (void *);
if (__builtin_add_overflow (size, new_size, &new_size))
goto fail;
old_size = data->size;
if (__builtin_expect (allocator_data
&& allocator_data->pool_size < ~(uintptr_t) 0, 0))
{
uintptr_t used_pool_size;
size_t prev_size = 0;
/* Check if we can use realloc. Don't use it if extra alignment
was used previously or newly, because realloc might return a pointer
with different alignment and then we'd need to memmove the data
again. */
if (free_allocator_data
&& free_allocator_data == allocator_data
&& new_alignment == sizeof (void *)
&& old_alignment == sizeof (struct omp_mem_header))
prev_size = old_size;
if (new_size > prev_size
&& new_size - prev_size > allocator_data->pool_size)
goto fail;
#ifdef HAVE_SYNC_BUILTINS
used_pool_size = __atomic_load_n (&allocator_data->used_pool_size,
MEMMODEL_RELAXED);
do
{
uintptr_t new_pool_size;
if (new_size > prev_size)
{
if (__builtin_add_overflow (used_pool_size, new_size - prev_size,
&new_pool_size)
|| new_pool_size > allocator_data->pool_size)
goto fail;
}
else
new_pool_size = used_pool_size + new_size - prev_size;
if (__atomic_compare_exchange_n (&allocator_data->used_pool_size,
&used_pool_size, new_pool_size,
true, MEMMODEL_RELAXED,
MEMMODEL_RELAXED))
break;
}
while (1);
#else
gomp_mutex_lock (&allocator_data->lock);
if (new_size > prev_size)
{
if (__builtin_add_overflow (allocator_data->used_pool_size,
new_size - prev_size,
&used_pool_size)
|| used_pool_size > allocator_data->pool_size)
{
gomp_mutex_unlock (&allocator_data->lock);
goto fail;
}
}
else
used_pool_size = (allocator_data->used_pool_size
+ new_size - prev_size);
allocator_data->used_pool_size = used_pool_size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
{
if (prev_size)
new_ptr = libnuma_data->numa_realloc (data->ptr, data->size,
new_size);
else
new_ptr = libnuma_data->numa_alloc_local (new_size);
}
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
if (prev_size)
new_ptr = memkind_data->memkind_realloc (kind, data->ptr,
new_size);
else
new_ptr = memkind_data->memkind_malloc (kind, new_size);
}
else
#endif
if (prev_size)
new_ptr = realloc (data->ptr, new_size);
else
new_ptr = malloc (new_size);
if (new_ptr == NULL)
{
#ifdef HAVE_SYNC_BUILTINS
__atomic_add_fetch (&allocator_data->used_pool_size,
prev_size - new_size,
MEMMODEL_RELAXED);
#else
gomp_mutex_lock (&allocator_data->lock);
allocator_data->used_pool_size -= new_size - prev_size;
gomp_mutex_unlock (&allocator_data->lock);
#endif
goto fail;
}
else if (prev_size)
{
ret = (char *) new_ptr + sizeof (struct omp_mem_header);
((struct omp_mem_header *) ret)[-1].ptr = new_ptr;
((struct omp_mem_header *) ret)[-1].size = new_size;
((struct omp_mem_header *) ret)[-1].allocator = allocator;
return ret;
}
}
else if (new_alignment == sizeof (void *)
&& old_alignment == sizeof (struct omp_mem_header)
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
&& memkind == free_memkind
#endif
&& (free_allocator_data == NULL
|| free_allocator_data->pool_size == ~(uintptr_t) 0))
{
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
new_ptr = libnuma_data->numa_realloc (data->ptr, data->size, new_size);
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
new_ptr = memkind_data->memkind_realloc (kind, data->ptr,
new_size);
}
else
#endif
new_ptr = realloc (data->ptr, new_size);
if (new_ptr == NULL)
goto fail;
ret = (char *) new_ptr + sizeof (struct omp_mem_header);
((struct omp_mem_header *) ret)[-1].ptr = new_ptr;
((struct omp_mem_header *) ret)[-1].size = new_size;
((struct omp_mem_header *) ret)[-1].allocator = allocator;
return ret;
}
else
{
#ifdef LIBGOMP_USE_LIBNUMA
if (memkind == GOMP_MEMKIND_LIBNUMA)
new_ptr = libnuma_data->numa_alloc_local (new_size);
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[memkind];
new_ptr = memkind_data->memkind_malloc (kind, new_size);
}
else
#endif
new_ptr = malloc (new_size);
if (new_ptr == NULL)
goto fail;
}
if (new_alignment > sizeof (void *))
ret = (void *) (((uintptr_t) new_ptr
+ sizeof (struct omp_mem_header)
+ new_alignment - sizeof (void *))
& ~(new_alignment - 1));
else
ret = (char *) new_ptr + sizeof (struct omp_mem_header);
((struct omp_mem_header *) ret)[-1].ptr = new_ptr;
((struct omp_mem_header *) ret)[-1].size = new_size;
((struct omp_mem_header *) ret)[-1].allocator = allocator;
if (old_size - old_alignment < size)
size = old_size - old_alignment;
memcpy (ret, ptr, size);
if (__builtin_expect (free_allocator_data
&& free_allocator_data->pool_size < ~(uintptr_t) 0, 0))
{
#ifdef HAVE_SYNC_BUILTINS
__atomic_add_fetch (&free_allocator_data->used_pool_size, -data->size,
MEMMODEL_RELAXED);
#else
gomp_mutex_lock (&free_allocator_data->lock);
free_allocator_data->used_pool_size -= data->size;
gomp_mutex_unlock (&free_allocator_data->lock);
#endif
}
#ifdef LIBGOMP_USE_LIBNUMA
if (free_memkind == GOMP_MEMKIND_LIBNUMA)
{
libnuma_data->numa_free (data->ptr, data->size);
return ret;
}
# ifdef LIBGOMP_USE_MEMKIND
else
# endif
#endif
#ifdef LIBGOMP_USE_MEMKIND
if (free_memkind)
{
struct gomp_memkind_data *memkind_data = gomp_get_memkind ();
void *kind = *memkind_data->kinds[free_memkind];
memkind_data->memkind_free (kind, data->ptr);
return ret;
}
#endif
free (data->ptr);
return ret;
fail:
if (allocator_data)
{
switch (allocator_data->fallback)
{
case omp_atv_default_mem_fb:
if (new_alignment > sizeof (void *)
#if defined(LIBGOMP_USE_MEMKIND) || defined(LIBGOMP_USE_LIBNUMA)
|| memkind
#endif
|| (allocator_data
&& allocator_data->pool_size < ~(uintptr_t) 0))
{
allocator = omp_default_mem_alloc;
goto retry;
}
/* Otherwise, we've already performed default mem allocation
and if that failed, it won't succeed again (unless it was
intermittent. Return NULL then, as that is the fallback. */
break;
case omp_atv_null_fb:
break;
default:
case omp_atv_abort_fb:
gomp_fatal ("Out of memory allocating %lu bytes",
(unsigned long) size);
case omp_atv_allocator_fb:
allocator = allocator_data->fb_data;
goto retry;
}
}
return NULL;
}
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