.

wcfs/internal/wcfs_virtmem.cpp

@@ -366,6 +366,9 @@ void* virt_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
     if (err != nil)
 	panic("TODO");	// XXX
 
+    mmap->incref(); // vma->mmap_overlay_server is keeping ref to mmap
+    vma->mmap_overlay_server = mmap._ptr();
+
     panic("TODO");
 }
 
@@ -382,6 +385,8 @@ void virt_munmap(VMA *vma, BigFile *file) {
     vma->mmap_overlay_server = NULL;
 
     mmap->unmap();
+
+    // XXX close mmap->fileh
 }
 
 // resync resyncs connection and its mappings onto different database view.