VM: Add a few pre-composed context stacks.

divine/vm/context.hpp

+// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+
+/*
+ * (c) 2016 Petr Ročkai <code@fixp.eu>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#pragma once
+
+#include <divine/vm/ctx-base.hpp>
+#include <divine/vm/ctx-track.hpp>
+#include <divine/vm/ctx-memory.hpp>
+#include <divine/vm/ctx-fault.hpp>
+#include <divine/vm/ctx-frame.hpp>
+#include <divine/vm/ctx-legacy.hpp>
+#include <divine/vm/ctx-debug.hpp>
+
+namespace divine::vm::ctx
+{
+    template< typename prog, typename heap >
+    using common = compose< track_nothing, snapshot, ptr2i, base< prog, heap > >;
+    using with_tracking = compose< track_loops, track_nothing >;
+    using with_debug = compose< legacy, fault, debug >;
+}
+
+namespace divine::vm
+{
+    using State = ctx::State;
+
+    template< typename prog, typename heap >
+    struct Context : compose_stack< ctx::with_debug, ctx::with_tracking, ctx::common< prog, heap > > {};
+
+    template< typename prog, typename heap >
+    struct ctx_const : compose_stack< ctx::track_nothing, ctx::common< prog, heap > >
+    {
+        void setup( int gds, int cds )
+        {
+            this->set( _VM_CR_Constants, this->heap().make( cds ).cooked() );
+            if ( gds )
+                this->set( _VM_CR_Globals, this->heap().make( gds ).cooked() );
+        }
+    };
+
+}