/* Copyright (C) 2020-2026 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 /* Keeping track whether a Fortran scalar allocatable/pointer has been   allocated via 'omp allocators'/'omp allocate'.  */ struct fort_alloc_splay_tree_key_s {  void *ptr;}; typedef struct fort_alloc_splay_tree_node_s *fort_alloc_splay_tree_node;typedef struct fort_alloc_splay_tree_s *fort_alloc_splay_tree;typedef struct fort_alloc_splay_tree_key_s *fort_alloc_splay_tree_key; static inline intfort_alloc_splay_compare (fort_alloc_splay_tree_key x, fort_alloc_splay_tree_key y){  if (x->ptr < y->ptr)    return -1;  if (x->ptr > y->ptr)    return 1;  return 0;}#define splay_tree_prefix fort_alloc#define splay_tree_static#include "splay-tree.h" #define splay_tree_prefix fort_alloc#define splay_tree_static#define splay_tree_c#include "splay-tree.h" static struct fort_alloc_splay_tree_s fort_alloc_scalars; /* Add pointer as being alloced by GOMP_alloc.  */voidGOMP_add_alloc (void *ptr){  if (ptr == NULL)    return;  fort_alloc_splay_tree_node item;  item = gomp_malloc (sizeof (struct splay_tree_node_s));  item->key.ptr = ptr;  item->left = NULL;  item->right = NULL;  fort_alloc_splay_tree_insert (&fort_alloc_scalars, item);} /* Remove pointer, either called by FREE or by REALLOC,   either of them can change the allocation status.  */boolGOMP_is_alloc (void *ptr){  struct fort_alloc_splay_tree_key_s needle;  fort_alloc_splay_tree_node n;  needle.ptr = ptr;  n = fort_alloc_splay_tree_lookup_node (&fort_alloc_scalars, &needle);  if (n)    {      fort_alloc_splay_tree_remove (&fort_alloc_scalars, &n->key);      free (n);    }  return n != NULL;}  #define omp_max_predefined_alloc omp_thread_mem_alloc#define ompx_gnu_min_predefined_alloc ompx_gnu_pinned_mem_alloc#define ompx_gnu_max_predefined_alloc ompx_gnu_managed_mem_alloc _Static_assert (GOMP_OMP_PREDEF_ALLOC_MAX == omp_thread_mem_alloc,		"GOMP_OMP_PREDEF_ALLOC_MAX == omp_thread_mem_alloc");_Static_assert (GOMP_OMPX_PREDEF_ALLOC_MIN == ompx_gnu_min_predefined_alloc,		"GOMP_OMPX_PREDEF_ALLOC_MIN == ompx_gnu_min_predefined_alloc");_Static_assert (GOMP_OMPX_PREDEF_ALLOC_MAX == ompx_gnu_max_predefined_alloc,		"GOMP_OMPX_PREDEF_ALLOC_MAX == ompx_gnu_max_predefined_alloc");_Static_assert (GOMP_OMP_PREDEF_ALLOC_THREADS == omp_thread_mem_alloc,		"GOMP_OMP_PREDEF_ALLOC_THREADS == omp_thread_mem_alloc"); #define omp_max_predefined_mem_space omp_low_lat_mem_space#define ompx_gnu_min_predefined_mem_space ompx_gnu_managed_mem_space#define ompx_gnu_max_predefined_mem_space ompx_gnu_managed_mem_space _Static_assert (GOMP_OMP_PREDEF_MEMSPACE_MAX == omp_max_predefined_mem_space,		"GOMP_OMP_PREDEF_MEMSPACE_MAX == omp_max_predefined_mem_space");_Static_assert (GOMP_OMPX_PREDEF_MEMSPACE_MIN == ompx_gnu_min_predefined_mem_space,		"GOMP_OMPX_PREDEF_MEMSPACE_MIN == ompx_gnu_min_predefined_mem_space");_Static_assert (GOMP_OMPX_PREDEF_MEMSPACE_MAX == ompx_gnu_max_predefined_mem_space,		"GOMP_OMPX_PREDEF_MEMSPACE_MAX == ompx_gnu_max_predefined_mem_space"); #if 0 /* For testing the fall-back macros compile, only.  */#undef MEMSPACE_ALLOC#undef MEMSPACE_CALLOC#undef MEMSPACE_REALLOC#undef MEMSPACE_FREE#undef MEMSPACE_VALIDATE#endif /* These macros may be overridden in config/<target>/allocator.c.   The defaults (no override) are to return NULL for pinned memory requests   or non-standard memory spaces (these need a deliberate implementation), and   pass through to the regular OS calls otherwise.   The following definitions (ab)use comma operators to avoid unused   variable errors.  */#ifndef MEMSPACE_ALLOC#define MEMSPACE_ALLOC(MEMSPACE, SIZE, PIN) \  ((PIN) || (MEMSPACE) > GOMP_OMP_PREDEF_MEMSPACE_MAX \   ? NULL : malloc (((void)(MEMSPACE), (SIZE))))#endif#ifndef MEMSPACE_CALLOC#define MEMSPACE_CALLOC(MEMSPACE, SIZE, PIN) \  ((PIN) || (MEMSPACE) > GOMP_OMP_PREDEF_MEMSPACE_MAX \   ? NULL : calloc (1, (((void)(MEMSPACE), (SIZE)))))#endif#ifndef MEMSPACE_REALLOC#define MEMSPACE_REALLOC(MEMSPACE, ADDR, OLDSIZE, SIZE, OLDPIN, PIN) \   ((PIN) || (OLDPIN) || (MEMSPACE) > GOMP_OMP_PREDEF_MEMSPACE_MAX \    ? NULL \    : realloc (ADDR, (((void)(MEMSPACE), (void)(OLDSIZE), (SIZE)))))#endif#ifndef MEMSPACE_FREE#define MEMSPACE_FREE(MEMSPACE, ADDR, SIZE, PIN) \  if (PIN) free (((void)(MEMSPACE), (void)(SIZE), (ADDR)))#endif#ifndef MEMSPACE_VALIDATE#define MEMSPACE_VALIDATE(MEMSPACE, ACCESS, PIN) \  ((PIN) || (MEMSPACE) > GOMP_OMP_PREDEF_MEMSPACE_MAX \   ? 0 : ((void)(MEMSPACE), (void)(ACCESS), 1))#endif /* Map the predefined allocators to the correct memory space.   The index to this table is the omp_allocator_handle_t enum value.   When the user calls omp_alloc with a predefined allocator this   table determines what memory they get.  */static const omp_memspace_handle_t predefined_omp_alloc_mapping[] = {  omp_default_mem_space,   /* omp_null_allocator doesn't actually use this. */  omp_default_mem_space,   /* omp_default_mem_alloc. */  omp_large_cap_mem_space, /* omp_large_cap_mem_alloc. */  omp_const_mem_space,     /* omp_const_mem_alloc. */  omp_high_bw_mem_space,   /* omp_high_bw_mem_alloc. */  omp_low_lat_mem_space,   /* omp_low_lat_mem_alloc. */  omp_low_lat_mem_space,   /* omp_cgroup_mem_alloc (implementation defined). */  omp_low_lat_mem_space,   /* omp_pteam_mem_alloc (implementation defined). */  omp_low_lat_mem_space,   /* omp_thread_mem_alloc (implementation defined). */};static const omp_memspace_handle_t predefined_ompx_gnu_alloc_mapping[] = {  omp_default_mem_space,   /* ompx_gnu_pinned_mem_alloc. */  ompx_gnu_managed_mem_space,  /* ompx_gnu_managed_mem_alloc. */}; #define ARRAY_SIZE(A) (sizeof (A) / sizeof ((A)[0]))_Static_assert (ARRAY_SIZE (predefined_omp_alloc_mapping)		== omp_max_predefined_alloc + 1,		"predefined_omp_alloc_mapping must match omp_memspace_handle_t");_Static_assert (ARRAY_SIZE (predefined_ompx_gnu_alloc_mapping)		== (ompx_gnu_max_predefined_alloc		    - ompx_gnu_min_predefined_alloc) + 1,		"predefined_ompx_gnu_alloc_mapping must match"		" omp_memspace_handle_t"); static inline boolpredefined_allocator_p (omp_allocator_handle_t allocator){  return allocator <= ompx_gnu_max_predefined_alloc;} static inline omp_memspace_handle_tpredefined_alloc_mapping (omp_allocator_handle_t allocator){  if (allocator <= omp_max_predefined_alloc)    return predefined_omp_alloc_mapping[allocator];  else if (allocator >= ompx_gnu_min_predefined_alloc	   && allocator <= ompx_gnu_max_predefined_alloc)    {      int index = allocator - ompx_gnu_min_predefined_alloc;      return predefined_ompx_gnu_alloc_mapping[index];    }  else    /* This should never happen.  */    return omp_default_mem_space;} 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_LIBNUMAstatic struct gomp_libnuma_data *libnuma_data;static pthread_once_t libnuma_data_once = PTHREAD_ONCE_INIT; static voidgomp_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_MEMKINDstatic struct gomp_memkind_data *memkind_data;static pthread_once_t memkind_data_once = PTHREAD_ONCE_INIT; static voidgomp_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_tomp_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_max_predefined_mem_space      && (memspace < ompx_gnu_min_predefined_mem_space	  || memspace > ompx_gnu_max_predefined_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;

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