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 "memory/universe.hpp" |
27 | #include "unittest.hpp" |
28 | |
29 | TEST_VM(CollectedHeap, is_in) { |
30 | CollectedHeap* heap = Universe::heap(); |
31 | |
32 | uintptr_t epsilon = (uintptr_t) MinObjAlignment; |
33 | uintptr_t heap_start = (uintptr_t) heap->reserved_region().start(); |
34 | uintptr_t heap_end = (uintptr_t) heap->reserved_region().end(); |
35 | |
36 | // Test that NULL is not in the heap. |
37 | ASSERT_FALSE(heap->is_in(NULL)) << "NULL is unexpectedly in the heap" ; |
38 | |
39 | // Test that a pointer to before the heap start is reported as outside the heap. |
40 | ASSERT_GE(heap_start, ((uintptr_t) NULL + epsilon)) |
41 | << "Sanity check - heap should not start at 0" ; |
42 | |
43 | void* before_heap = (void*) (heap_start - epsilon); |
44 | ASSERT_FALSE(heap->is_in(before_heap)) << "before_heap: " << p2i(before_heap) |
45 | << " is unexpectedly in the heap" ; |
46 | |
47 | // Test that a pointer to after the heap end is reported as outside the heap. |
48 | ASSERT_LE(heap_end, ((uintptr_t)-1 - epsilon)) |
49 | << "Sanity check - heap should not end at the end of address space" ; |
50 | |
51 | void* after_heap = (void*) (heap_end + epsilon); |
52 | ASSERT_FALSE(heap->is_in(after_heap)) << "after_heap: " << p2i(after_heap) |
53 | << " is unexpectedly in the heap" ; |
54 | } |
55 | |