[test] Introducing new proposed metavars \lhost_read and \lhost_written

tests/meta/lhost.c

+/* run.config
+OPT: @META@ @PRINT@
+*/
+
+struct S {
+  unsigned owner;
+  int data;
+};
+
+extern unsigned current_id;
+
+int read(struct S* s) {
+  if (s->owner != current_id) return -1;
+  return s->data;
+}
+
+int write(struct S* s, int val) {
+  if (s->owner != current_id) return -1;
+  s->data = val;
+  return 0;
+}
+
+/*@ meta \prop,
+  \name(only_owner_reads),
+  \targets(\ALL),
+  \context(\reading),
+  \tguard(
+    \assert_type((struct S*)\lhost_read) &&
+    (!\separated(&(\lhost_read->data),\read) ==>
+     \lhost_read->owner == current_id);
+*/
+
+/*@ meta \prop,
+  \name(only_owner_writes),
+  \targets(\ALL),
+  \context(\writing),
+  \tguard(
+    \assert_type((struct S*)\lhost_written) &&
+    (!\separated(&(\lhost_written->data),\written) ==>
+     \lhost_written->owner == current_id);
+*/