/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.io.File;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import java.util.ArrayList;
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import java.util.Map;
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public class Main {
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private static final String TEMP_FILE_NAME_PREFIX = "test";
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private static final String TEMP_FILE_NAME_SUFFIX = ".trace";
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public static void main(String[] args) throws Exception {
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String name = System.getProperty("java.vm.name");
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if (!"Dalvik".equals(name)) {
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System.out.println("This test is not supported on " + name);
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return;
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}
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testMethodTracing();
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testCountInstances();
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testGetInstances();
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testRuntimeStat();
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testRuntimeStats();
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}
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private static File createTempFile() throws Exception {
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try {
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return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
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} catch (IOException e) {
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System.setProperty("java.io.tmpdir", "/data/local/tmp");
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try {
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return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
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} catch (IOException e2) {
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System.setProperty("java.io.tmpdir", "/sdcard");
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return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
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}
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}
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}
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private static void testMethodTracing() throws Exception {
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File tempFile = null;
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try {
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tempFile = createTempFile();
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testMethodTracingToFile(tempFile);
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} finally {
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if (tempFile != null) {
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tempFile.delete();
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}
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}
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}
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private static void testMethodTracingToFile(File tempFile) throws Exception {
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String tempFileName = tempFile.getPath();
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if (VMDebug.getMethodTracingMode() != 0) {
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VMDebug.stopMethodTracing();
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}
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System.out.println("Confirm enable/disable");
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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VMDebug.stopMethodTracing();
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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if (tempFile.length() == 0) {
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System.out.println("ERROR: tracing output file is empty");
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}
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System.out.println("Confirm sampling");
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VMDebug.startMethodTracing(tempFileName, 0, 0, true, 1000);
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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VMDebug.stopMethodTracing();
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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if (tempFile.length() == 0) {
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System.out.println("ERROR: sample tracing output file is empty");
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}
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System.out.println("Test starting when already started");
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VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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System.out.println("Test stopping when already stopped");
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VMDebug.stopMethodTracing();
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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VMDebug.stopMethodTracing();
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System.out.println("status=" + VMDebug.getMethodTracingMode());
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System.out.println("Test tracing with empty filename");
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try {
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VMDebug.startMethodTracing("", 0, 0, false, 0);
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System.out.println("Should have thrown an exception");
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} catch (Exception e) {
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System.out.println("Got expected exception");
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}
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System.out.println("Test tracing with bogus (< 1024 && != 0) filesize");
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try {
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VMDebug.startMethodTracing(tempFileName, 1000, 0, false, 0);
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System.out.println("Should have thrown an exception");
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} catch (Exception e) {
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System.out.println("Got expected exception");
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}
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System.out.println("Test sampling with bogus (<= 0) interval");
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try {
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VMDebug.startMethodTracing(tempFileName, 0, 0, true, 0);
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System.out.println("Should have thrown an exception");
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} catch (Exception e) {
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System.out.println("Got expected exception");
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}
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tempFile.delete();
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}
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private static void checkNumber(String s) throws Exception {
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if (s == null) {
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System.out.println("Got null string");
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return;
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}
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long n = Long.parseLong(s);
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if (n < 0) {
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System.out.println("Got negative number " + n);
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}
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}
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private static void checkHistogram(String s) throws Exception {
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if (s == null || s.length() == 0) {
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System.out.println("Got null or empty string");
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return;
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}
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String[] buckets = s.split(",");
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long last_key = 0;
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for (int i = 0; i < buckets.length; ++i) {
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String bucket = buckets[i];
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if (bucket.length() == 0) {
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System.out.println("Got empty bucket");
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continue;
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}
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String[] kv = bucket.split(":");
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if (kv.length != 2 || kv[0].length() == 0 || kv[1].length() == 0) {
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System.out.println("Got bad bucket " + bucket);
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continue;
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}
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long key = Long.parseLong(kv[0]);
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long value = Long.parseLong(kv[1]);
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if (key < 0 || value < 0) {
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System.out.println("Got negative key or value " + bucket);
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continue;
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}
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if (key < last_key) {
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System.out.println("Got decreasing key " + bucket);
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continue;
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}
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last_key = key;
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}
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}
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private static void testRuntimeStat() throws Exception {
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// Invoke at least one GC and wait for 20 seconds or so so we get at
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// least one bucket in the histograms.
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for (int i = 0; i < 20; ++i) {
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Runtime.getRuntime().gc();
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Thread.sleep(1000L);
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}
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String gc_count = VMDebug.getRuntimeStat("art.gc.gc-count");
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String gc_time = VMDebug.getRuntimeStat("art.gc.gc-time");
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String bytes_allocated = VMDebug.getRuntimeStat("art.gc.bytes-allocated");
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String bytes_freed = VMDebug.getRuntimeStat("art.gc.bytes-freed");
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String blocking_gc_count = VMDebug.getRuntimeStat("art.gc.blocking-gc-count");
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String blocking_gc_time = VMDebug.getRuntimeStat("art.gc.blocking-gc-time");
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String gc_count_rate_histogram = VMDebug.getRuntimeStat("art.gc.gc-count-rate-histogram");
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String blocking_gc_count_rate_histogram =
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VMDebug.getRuntimeStat("art.gc.blocking-gc-count-rate-histogram");
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checkNumber(gc_count);
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checkNumber(gc_time);
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checkNumber(bytes_allocated);
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checkNumber(bytes_freed);
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checkNumber(blocking_gc_count);
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checkNumber(blocking_gc_time);
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checkHistogram(gc_count_rate_histogram);
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checkHistogram(blocking_gc_count_rate_histogram);
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}
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private static void testRuntimeStats() throws Exception {
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// Invoke at least one GC and wait for 20 seconds or so so we get at
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// least one bucket in the histograms.
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for (int i = 0; i < 20; ++i) {
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Runtime.getRuntime().gc();
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Thread.sleep(1000L);
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}
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Map<String, String> map = VMDebug.getRuntimeStats();
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String gc_count = map.get("art.gc.gc-count");
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String gc_time = map.get("art.gc.gc-time");
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String bytes_allocated = map.get("art.gc.bytes-allocated");
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String bytes_freed = map.get("art.gc.bytes-freed");
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String blocking_gc_count = map.get("art.gc.blocking-gc-count");
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String blocking_gc_time = map.get("art.gc.blocking-gc-time");
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String gc_count_rate_histogram = map.get("art.gc.gc-count-rate-histogram");
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String blocking_gc_count_rate_histogram =
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map.get("art.gc.blocking-gc-count-rate-histogram");
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checkNumber(gc_count);
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checkNumber(gc_time);
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checkNumber(bytes_allocated);
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checkNumber(bytes_freed);
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checkNumber(blocking_gc_count);
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checkNumber(blocking_gc_time);
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checkHistogram(gc_count_rate_histogram);
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checkHistogram(blocking_gc_count_rate_histogram);
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}
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static class ClassA { }
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static class ClassB { }
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static class ClassC extends ClassA { }
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private static void testCountInstances() throws Exception {
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ArrayList<Object> l = new ArrayList<Object>();
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l.add(new ClassA());
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l.add(new ClassB());
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l.add(new ClassA());
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l.add(new ClassC());
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Runtime.getRuntime().gc();
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System.out.println("Instances of ClassA " +
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VMDebug.countInstancesofClass(ClassA.class, false));
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System.out.println("Instances of ClassB " +
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VMDebug.countInstancesofClass(ClassB.class, false));
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System.out.println("Instances of null " + VMDebug.countInstancesofClass(null, false));
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System.out.println("Instances of ClassA assignable " +
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VMDebug.countInstancesofClass(ClassA.class, true));
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Class<?>[] classes = new Class<?>[] {ClassA.class, ClassB.class, null};
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long[] counts = VMDebug.countInstancesofClasses(classes, false);
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System.out.println("Array counts " + Arrays.toString(counts));
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counts = VMDebug.countInstancesofClasses(classes, true);
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System.out.println("Array counts assignable " + Arrays.toString(counts));
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}
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static class ClassD {
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public int mask;
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public ClassD(int mask) {
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this.mask = mask;
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}
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}
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static class ClassE extends ClassD {
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public ClassE(int mask) {
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super(mask);
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}
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}
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private static void testGetInstances() throws Exception {
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ArrayList<Object> l = new ArrayList<Object>();
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l.add(new ClassD(0x01));
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l.add(new ClassE(0x02));
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l.add(new ClassD(0x04));
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l.add(new ClassD(0x08));
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l.add(new ClassE(0x10));
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Runtime.getRuntime().gc();
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Class<?>[] classes = new Class<?>[] {ClassD.class, ClassE.class, null};
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Object[][] instances = VMDebug.getInstancesOfClasses(classes, false);
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int mask = 0;
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for (Object instance : instances[0]) {
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mask |= ((ClassD)instance).mask;
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}
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System.out.println("ClassD got " + instances[0].length + ", combined mask: " + mask);
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mask = 0;
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for (Object instance : instances[1]) {
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mask |= ((ClassD)instance).mask;
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}
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System.out.println("ClassE got " + instances[1].length + ", combined mask: " + mask);
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System.out.println("null got " + instances[2].length);
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instances = VMDebug.getInstancesOfClasses(classes, true);
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mask = 0;
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for (Object instance : instances[0]) {
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mask |= ((ClassD)instance).mask;
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}
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System.out.println("ClassD assignable got " + instances[0].length + ", combined mask: " + mask);
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mask = 0;
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for (Object instance : instances[1]) {
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mask |= ((ClassD)instance).mask;
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}
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System.out.println("ClassE assignable got " + instances[1].length + ", combined mask: " + mask);
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System.out.println("null assignable got " + instances[2].length);
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}
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private static class VMDebug {
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private static final Method startMethodTracingMethod;
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private static final Method stopMethodTracingMethod;
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private static final Method getMethodTracingModeMethod;
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private static final Method getRuntimeStatMethod;
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private static final Method getRuntimeStatsMethod;
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private static final Method countInstancesOfClassMethod;
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private static final Method countInstancesOfClassesMethod;
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private static final Method getInstancesOfClassesMethod;
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static {
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try {
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Class<?> c = Class.forName("dalvik.system.VMDebug");
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startMethodTracingMethod = c.getDeclaredMethod("startMethodTracing", String.class,
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Integer.TYPE, Integer.TYPE, Boolean.TYPE, Integer.TYPE);
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stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing");
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getMethodTracingModeMethod = c.getDeclaredMethod("getMethodTracingMode");
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getRuntimeStatMethod = c.getDeclaredMethod("getRuntimeStat", String.class);
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getRuntimeStatsMethod = c.getDeclaredMethod("getRuntimeStats");
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countInstancesOfClassMethod = c.getDeclaredMethod("countInstancesOfClass",
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Class.class, Boolean.TYPE);
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countInstancesOfClassesMethod = c.getDeclaredMethod("countInstancesOfClasses",
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Class[].class, Boolean.TYPE);
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getInstancesOfClassesMethod = c.getDeclaredMethod("getInstancesOfClasses",
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Class[].class, Boolean.TYPE);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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public static void startMethodTracing(String filename, int bufferSize, int flags,
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boolean samplingEnabled, int intervalUs) throws Exception {
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startMethodTracingMethod.invoke(null, filename, bufferSize, flags, samplingEnabled,
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intervalUs);
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}
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public static void stopMethodTracing() throws Exception {
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stopMethodTracingMethod.invoke(null);
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}
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public static int getMethodTracingMode() throws Exception {
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return (int) getMethodTracingModeMethod.invoke(null);
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}
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public static String getRuntimeStat(String statName) throws Exception {
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return (String) getRuntimeStatMethod.invoke(null, statName);
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}
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public static Map<String, String> getRuntimeStats() throws Exception {
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return (Map<String, String>) getRuntimeStatsMethod.invoke(null);
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}
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public static long countInstancesofClass(Class<?> c, boolean assignable) throws Exception {
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return (long) countInstancesOfClassMethod.invoke(null, new Object[]{c, assignable});
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}
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public static long[] countInstancesofClasses(Class<?>[] classes, boolean assignable)
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throws Exception {
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return (long[]) countInstancesOfClassesMethod.invoke(
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null, new Object[]{classes, assignable});
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}
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public static Object[][] getInstancesOfClasses(Class<?>[] classes, boolean assignable) throws Exception {
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return (Object[][]) getInstancesOfClassesMethod.invoke(
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null, new Object[]{classes, assignable});
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}
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}
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}
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