1 /* 2 * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "gc/shared/collectedHeap.hpp" 26 #include "unittest.hpp" 27 28 TEST_VM(CollectedHeap, is_in) { 29 CollectedHeap* heap = Universe::heap(); 30 31 uintptr_t epsilon = (uintptr_t) MinObjAlignment; 32 uintptr_t heap_start = (uintptr_t) heap->reserved_region().start(); 33 uintptr_t heap_end = (uintptr_t) heap->reserved_region().end(); 34 35 // Test that NULL is not in the heap. 36 ASSERT_FALSE(heap->is_in(NULL)) << "NULL is unexpectedly in the heap"; 37 38 // Test that a pointer to before the heap start is reported as outside the heap. 39 ASSERT_GE(heap_start, ((uintptr_t) NULL + epsilon)) 40 << "Sanity check - heap should not start at 0"; 41 42 void* before_heap = (void*) (heap_start - epsilon); 43 ASSERT_FALSE(heap->is_in(before_heap)) << "before_heap: " << p2i(before_heap) 44 << " is unexpectedly in the heap"; 45 46 // Test that a pointer to after the heap end is reported as outside the heap. 47 ASSERT_LE(heap_end, ((uintptr_t)-1 - epsilon)) 48 << "Sanity check - heap should not end at the end of address space"; 49 50 void* after_heap = (void*) (heap_end + epsilon); 51 ASSERT_FALSE(heap->is_in(after_heap)) << "after_heap: " << p2i(after_heap) 52 << " is unexpectedly in the heap"; 53 }