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author | Elliott Hughes <enh@google.com> | 2012-06-05 14:13:59 -0700 |
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committer | Android Git Automerger <android-git-automerger@android.com> | 2012-06-05 14:13:59 -0700 |
commit | 2436ea181dc24ec4d91a6052394d24bf60987f25 (patch) | |
tree | bc0ebc9a59e222b94c4438c6675a07dad6cbd991 /tests | |
parent | 5e037ee6df37069ba12c9a9eccbf01dd232b1d7d (diff) | |
parent | 90d3e3b3999aa22d0cecc4f064e5686c555ad700 (diff) | |
download | android_dalvik-2436ea181dc24ec4d91a6052394d24bf60987f25.tar.gz android_dalvik-2436ea181dc24ec4d91a6052394d24bf60987f25.tar.bz2 android_dalvik-2436ea181dc24ec4d91a6052394d24bf60987f25.zip |
am 90d3e3b3: Merge "Add test cases for concurrent gc and System.arraycopy"
* commit '90d3e3b3999aa22d0cecc4f064e5686c555ad700':
Add test cases for concurrent gc and System.arraycopy
Diffstat (limited to 'tests')
-rw-r--r-- | tests/096-array-copy-concurrent-gc/expected.txt | 3 | ||||
-rw-r--r-- | tests/096-array-copy-concurrent-gc/info.txt | 2 | ||||
-rw-r--r-- | tests/096-array-copy-concurrent-gc/src/Main.java | 86 |
3 files changed, 91 insertions, 0 deletions
diff --git a/tests/096-array-copy-concurrent-gc/expected.txt b/tests/096-array-copy-concurrent-gc/expected.txt new file mode 100644 index 000000000..23b9dab6b --- /dev/null +++ b/tests/096-array-copy-concurrent-gc/expected.txt @@ -0,0 +1,3 @@ +Initializing... +Starting the test +Test OK diff --git a/tests/096-array-copy-concurrent-gc/info.txt b/tests/096-array-copy-concurrent-gc/info.txt new file mode 100644 index 000000000..37dd8be9b --- /dev/null +++ b/tests/096-array-copy-concurrent-gc/info.txt @@ -0,0 +1,2 @@ +This is a test to verify that System.arraycopy works nice together with +the concurrent gc. diff --git a/tests/096-array-copy-concurrent-gc/src/Main.java b/tests/096-array-copy-concurrent-gc/src/Main.java new file mode 100644 index 000000000..c8e538b5e --- /dev/null +++ b/tests/096-array-copy-concurrent-gc/src/Main.java @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2011 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. + */ + +/** + * Running concurrent gc and doing some System.arraycopy + * Several threads is created in order to increase the probability + * of thread switches at critical points. Without creating several + * threads the test case usually passed even when there were bugs. + * Size of array and amount of garbage created is based on experimental + * numbers and is a tradeoff between time that the test takes when + * it succeeds and the probability that the test discovers a problem. + */ +public class Main { + public static void main(String args[]) { + new ObjectCreatorThread(true).start(); + new ObjectCreatorThread(false).start(); + new ObjectCreatorThread(false).start(); + } + + static class ObjectCreatorThread extends Thread { + boolean mDoLog; + public ObjectCreatorThread(boolean doLog) { + mDoLog = doLog; + } + + @Override + public void run() { + new Main().stressArray(mDoLog); + } + } + + Object [] array = new Object[10000]; + + void stressArray(boolean doLog) { + // We want many references in the array + // We also want elements close to each other to have large + // diff in address so lets skip every 2:nd address so it is null + if (doLog) { + System.out.println("Initializing..."); + } + for (int i = 0; i < array.length; i+=2) { + array[i] = new String("Creating some garbage" + i); + } + + if (doLog) { + System.out.println("Starting the test"); + } + + for (int j = 0; j < array.length; j++) { + Object obj = array[array.length - 1]; + System.arraycopy(array, 0, array, 1, array.length - 1); + array[0] = obj; + new String("Creating some garbage" + Math.random()); + new String("Creating some garbage" + Math.random()); + new String("Creating some garbage" + Math.random()); + new String("Creating some garbage" + Math.random()); + } + + for (int j = 0; j < array.length; j++) { + Object obj = array[0]; + System.arraycopy(array, 1, array, 0, array.length - 1); + array[array.length - 1] = obj; + new String("Creating some garbage" + Math.random()); + new String("Creating some garbage" + Math.random()); + new String("Creating some garbage" + Math.random()); + new String("Creating some garbage" + Math.random()); + } + + if (doLog) { + System.out.println("Test OK"); + } + } +} |