Region-map attach/detach stress depot_autopilot test

Issue #3715

repos/base/src/test/rm_stress/main.cc

@@ -0,0 +1,70 @@
+/*
+ * \brief  Test program for stressing region-map attachments
+ * \author Christian Helmuth
+ * \date   2020-04-03
+ */
+
+/*
+ * Copyright (C) 2020 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+/* Genode includes */
+#include <base/component.h>
+#include <base/log.h>
+#include <base/attached_ram_dataspace.h>
+
+
+using namespace Genode;
+
+struct X : Genode::Hex
+{
+	template <typename T>
+	explicit X(T value) : Genode::Hex(value, OMIT_PREFIX, PAD) { }
+};
+
+
+struct Page : Attached_ram_dataspace
+{
+	unsigned char const color;
+
+	Page(Env &env, unsigned char color)
+	:
+		Attached_ram_dataspace(env.ram(), env.rm(), 0x1000),
+		color(color)
+	{
+		memset(local_addr<void>(), color, size());
+
+		log("new page @ ", local_addr<void>(), " with color ", X(*local_addr<unsigned char>()));
+	}
+};
+
+
+void Component::construct(Env &env)
+{
+	log("--- region-map attachment stress test ---");
+
+	Page page[] = { { env, 0xaa }, { env, 0x55 } };
+
+	enum { ROUNDS = 10000 };
+
+	for (unsigned r = 0; r < ROUNDS; ++r) {
+		for (unsigned i = 0; i < sizeof(page)/sizeof(*page); ++i) {
+			off_t const offset = 0;
+
+			unsigned char volatile const *v =
+				env.rm().attach(page[i].cap(), page[i].size(), offset);
+
+			if (page[i].color != *v) {
+				error("value @ ", v, "  ", X(*v), " != ", X(page[i].color), " in round ", r);
+				env.parent().exit(-1);
+			}
+
+			env.rm().detach(Region_map::Local_addr(v));
+		}
+	}
+
+	env.parent().exit(0);
+}

repos/base/src/test/rm_stress/target.mk

@@ -0,0 +1,3 @@
+TARGET = test-rm_stress
+SRC_CC = main.cc
+LIBS   = base