diff -r 4ebc2e2fb97c -r 71c04702a3d5 test/hotspot/gtest/gc/shared/test_collectedHeap.cpp --- /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"; +}