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author | Mathieu Chartier <mathieuc@google.com> | 2014-09-08 14:48:25 -0700 |
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committer | Mathieu Chartier <mathieuc@google.com> | 2014-09-08 15:08:24 -0700 |
commit | bccf12317e7511d6c49e3d9ab3e40e7b9843eb5b (patch) | |
tree | 715f9231604277d60a2c8828b27faa206c0f0b5c /test/120-hashcode/src | |
parent | 6148d5340d5f2f4cffaa465229a1722b5a775c28 (diff) | |
download | art-bccf12317e7511d6c49e3d9ab3e40e7b9843eb5b.zip art-bccf12317e7511d6c49e3d9ab3e40e7b9843eb5b.tar.gz art-bccf12317e7511d6c49e3d9ab3e40e7b9843eb5b.tar.bz2 |
Add test for hashCode and System.identityHashCode.
Change-Id: I325e95c23bda05bc9babff428111bb8d21f7f2d4
Diffstat (limited to 'test/120-hashcode/src')
-rw-r--r-- | test/120-hashcode/src/Main.java | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/120-hashcode/src/Main.java b/test/120-hashcode/src/Main.java new file mode 100644 index 0000000..d2435ce --- /dev/null +++ b/test/120-hashcode/src/Main.java @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2014 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +public class Main { + public static void main(String[] args) { + Object o = new Object(); + // Generate a hashcode and put it in the lock word. + int hashOrig = o.hashCode(); + int hashInflated = 0; + int hashSystemOrig = System.identityHashCode(o); + int hashSystemInflated = 0; + // Inflate the monitor to move the hash from the lock word to the Monitor. + synchronized (o) { + hashInflated = o.hashCode(); + hashSystemInflated = System.identityHashCode(o); + } + // Make sure that all the hashes agree. + if (hashOrig != hashInflated || hashOrig != hashSystemOrig || + hashSystemOrig != hashSystemInflated) { + System.err.println("hash codes dont match: " + hashOrig + " " + hashInflated + " " + + hashSystemOrig + " " + hashSystemInflated); + } + System.out.println("Done."); + } +} + + |