[PATCH v4 1/5] server: Fix shared object offset when additional blocks are allocated.

[Rémi Bernon]

From: Rémi Bernon

The shared object offset is an absolute offset from the start of the
session shared memory file, as it is used to identify the corresponding
mmapped block on the client side.
---
 server/mapping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/mapping.c b/server/mapping.c
index 61e026359ae..7edadcbbeda 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -1394,7 +1394,7 @@ volatile void *alloc_shared_object(void)

if (!(block = find_free_session_block( size ))) return NULL;
         object = (struct session_object *)(block->data + block->used_size);
-        object->offset = (char *)&object->obj - block->data;
+        object->offset = block->offset + (char *)&object->obj - block->data;
         block->used_size += size;
     }