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Diffstat (limited to 'libgomp/target.c')
-rw-r--r--libgomp/target.c87
1 files changed, 72 insertions, 15 deletions
diff --git a/libgomp/target.c b/libgomp/target.c
index 932b176..1ab30f7 100644
--- a/libgomp/target.c
+++ b/libgomp/target.c
@@ -464,7 +464,7 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
}
else
n = splay_tree_lookup (mem_map, &cur_node);
- if (n)
+ if (n && n->refcount != REFCOUNT_LINK)
gomp_map_vars_existing (devicep, n, &cur_node, &tgt->list[i],
kind & typemask);
else
@@ -628,11 +628,19 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
else
k->host_end = k->host_start + sizeof (void *);
splay_tree_key n = splay_tree_lookup (mem_map, k);
- if (n)
+ if (n && n->refcount != REFCOUNT_LINK)
gomp_map_vars_existing (devicep, n, k, &tgt->list[i],
kind & typemask);
else
{
+ k->link_key = NULL;
+ if (n && n->refcount == REFCOUNT_LINK)
+ {
+ /* Replace target address of the pointer with target address
+ of mapped object in the splay tree. */
+ splay_tree_remove (mem_map, n);
+ k->link_key = n;
+ }
size_t align = (size_t) 1 << (kind >> rshift);
tgt->list[i].key = k;
k->tgt = tgt;
@@ -752,6 +760,16 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
gomp_fatal ("%s: unhandled kind 0x%.2x", __FUNCTION__,
kind);
}
+
+ if (k->link_key)
+ {
+ /* Set link pointer on target to the device address of the
+ mapped object. */
+ void *tgt_addr = (void *) (tgt->tgt_start + k->tgt_offset);
+ devicep->host2dev_func (devicep->target_id,
+ (void *) n->tgt_offset,
+ &tgt_addr, sizeof (void *));
+ }
array++;
}
}
@@ -884,6 +902,9 @@ gomp_unmap_vars (struct target_mem_desc *tgt, bool do_copyfrom)
if (do_unmap)
{
splay_tree_remove (&devicep->mem_map, k);
+ if (k->link_key)
+ splay_tree_insert (&devicep->mem_map,
+ (splay_tree_node) k->link_key);
if (k->tgt->refcount > 1)
k->tgt->refcount--;
else
@@ -1020,31 +1041,40 @@ gomp_load_image_to_device (struct gomp_device_descr *devicep, unsigned version,
k->tgt_offset = target_table[i].start;
k->refcount = REFCOUNT_INFINITY;
k->async_refcount = 0;
+ k->link_key = NULL;
array->left = NULL;
array->right = NULL;
splay_tree_insert (&devicep->mem_map, array);
array++;
}
+ /* Most significant bit of the size in host and target tables marks
+ "omp declare target link" variables. */
+ const uintptr_t link_bit = 1ULL << (sizeof (uintptr_t) * __CHAR_BIT__ - 1);
+ const uintptr_t size_mask = ~link_bit;
+
for (i = 0; i < num_vars; i++)
{
struct addr_pair *target_var = &target_table[num_funcs + i];
- if (target_var->end - target_var->start
- != (uintptr_t) host_var_table[i * 2 + 1])
+ uintptr_t target_size = target_var->end - target_var->start;
+
+ if ((uintptr_t) host_var_table[i * 2 + 1] != target_size)
{
gomp_mutex_unlock (&devicep->lock);
if (is_register_lock)
gomp_mutex_unlock (&register_lock);
- gomp_fatal ("Can't map target variables (size mismatch)");
+ gomp_fatal ("Cannot map target variables (size mismatch)");
}
splay_tree_key k = &array->key;
k->host_start = (uintptr_t) host_var_table[i * 2];
- k->host_end = k->host_start + (uintptr_t) host_var_table[i * 2 + 1];
+ k->host_end
+ = k->host_start + (size_mask & (uintptr_t) host_var_table[i * 2 + 1]);
k->tgt = tgt;
k->tgt_offset = target_var->start;
- k->refcount = REFCOUNT_INFINITY;
+ k->refcount = target_size & link_bit ? REFCOUNT_LINK : REFCOUNT_INFINITY;
k->async_refcount = 0;
+ k->link_key = NULL;
array->left = NULL;
array->right = NULL;
splay_tree_insert (&devicep->mem_map, array);
@@ -1072,7 +1102,6 @@ gomp_unload_image_from_device (struct gomp_device_descr *devicep,
int num_funcs = host_funcs_end - host_func_table;
int num_vars = (host_vars_end - host_var_table) / 2;
- unsigned j;
struct splay_tree_key_s k;
splay_tree_key node = NULL;
@@ -1088,21 +1117,46 @@ gomp_unload_image_from_device (struct gomp_device_descr *devicep,
devicep->unload_image_func (devicep->target_id, version, target_data);
/* Remove mappings from splay tree. */
- for (j = 0; j < num_funcs; j++)
+ int i;
+ for (i = 0; i < num_funcs; i++)
{
- k.host_start = (uintptr_t) host_func_table[j];
+ k.host_start = (uintptr_t) host_func_table[i];
k.host_end = k.host_start + 1;
splay_tree_remove (&devicep->mem_map, &k);
}
- for (j = 0; j < num_vars; j++)
+ /* Most significant bit of the size in host and target tables marks
+ "omp declare target link" variables. */
+ const uintptr_t link_bit = 1ULL << (sizeof (uintptr_t) * __CHAR_BIT__ - 1);
+ const uintptr_t size_mask = ~link_bit;
+ bool is_tgt_unmapped = false;
+
+ for (i = 0; i < num_vars; i++)
{
- k.host_start = (uintptr_t) host_var_table[j * 2];
- k.host_end = k.host_start + (uintptr_t) host_var_table[j * 2 + 1];
- splay_tree_remove (&devicep->mem_map, &k);
+ k.host_start = (uintptr_t) host_var_table[i * 2];
+ k.host_end
+ = k.host_start + (size_mask & (uintptr_t) host_var_table[i * 2 + 1]);
+
+ if (!(link_bit & (uintptr_t) host_var_table[i * 2 + 1]))
+ splay_tree_remove (&devicep->mem_map, &k);
+ else
+ {
+ splay_tree_key n = splay_tree_lookup (&devicep->mem_map, &k);
+ splay_tree_remove (&devicep->mem_map, n);
+ if (n->link_key)
+ {
+ if (n->tgt->refcount > 1)
+ n->tgt->refcount--;
+ else
+ {
+ is_tgt_unmapped = true;
+ gomp_unmap_tgt (n->tgt);
+ }
+ }
+ }
}
- if (node)
+ if (node && !is_tgt_unmapped)
{
free (node->tgt);
free (node);
@@ -1658,6 +1712,9 @@ gomp_exit_data (struct gomp_device_descr *devicep, size_t mapnum,
if (k->refcount == 0)
{
splay_tree_remove (&devicep->mem_map, k);
+ if (k->link_key)
+ splay_tree_insert (&devicep->mem_map,
+ (splay_tree_node) k->link_key);
if (k->tgt->refcount > 1)
k->tgt->refcount--;
else
generated by cgit v1.1 at 2025-08-09 15:00:17 +0000