test/hotspot/gtest/gc/shared/test_collectedHeap.cpp
changeset 47216 71c04702a3d5
parent 42592 6c1ca562e05a
child 54786 ebf733a324d4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/gtest/gc/shared/test_collectedHeap.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "precompiled.hpp"
+#include "gc/shared/collectedHeap.hpp"
+#include "unittest.hpp"
+
+TEST_VM(CollectedHeap, is_in) {
+  CollectedHeap* heap = Universe::heap();
+
+  uintptr_t epsilon = (uintptr_t) MinObjAlignment;
+  uintptr_t heap_start = (uintptr_t) heap->reserved_region().start();
+  uintptr_t heap_end = (uintptr_t) heap->reserved_region().end();
+
+  // Test that NULL is not in the heap.
+  ASSERT_FALSE(heap->is_in(NULL)) << "NULL is unexpectedly in the heap";
+
+  // Test that a pointer to before the heap start is reported as outside the heap.
+  ASSERT_GE(heap_start, ((uintptr_t) NULL + epsilon))
+          << "Sanity check - heap should not start at 0";
+
+  void* before_heap = (void*) (heap_start - epsilon);
+  ASSERT_FALSE(heap->is_in(before_heap)) << "before_heap: " << p2i(before_heap)
+          << " is unexpectedly in the heap";
+
+  // Test that a pointer to after the heap end is reported as outside the heap.
+  ASSERT_LE(heap_end, ((uintptr_t)-1 - epsilon))
+          << "Sanity check - heap should not end at the end of address space";
+
+  void* after_heap = (void*) (heap_end + epsilon);
+  ASSERT_FALSE(heap->is_in(after_heap)) << "after_heap: " << p2i(after_heap)
+          << " is unexpectedly in the heap";
+}