/test/099-vmdebug/src/Main.java
Java | 365 lines | 315 code | 31 blank | 19 comment | 34 complexity | f67bac12ff86ab592a501bf82ea24d0d MD5 | raw file
- /*
- * 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.
- */
- import java.io.File;
- import java.io.IOException;
- import java.lang.reflect.Method;
- import java.util.Arrays;
- import java.util.ArrayList;
- import java.util.Map;
- public class Main {
- private static final String TEMP_FILE_NAME_PREFIX = "test";
- private static final String TEMP_FILE_NAME_SUFFIX = ".trace";
- public static void main(String[] args) throws Exception {
- String name = System.getProperty("java.vm.name");
- if (!"Dalvik".equals(name)) {
- System.out.println("This test is not supported on " + name);
- return;
- }
- testMethodTracing();
- testCountInstances();
- testGetInstances();
- testRuntimeStat();
- testRuntimeStats();
- }
- private static File createTempFile() throws Exception {
- try {
- return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
- } catch (IOException e) {
- System.setProperty("java.io.tmpdir", "/data/local/tmp");
- try {
- return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
- } catch (IOException e2) {
- System.setProperty("java.io.tmpdir", "/sdcard");
- return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
- }
- }
- }
- private static void testMethodTracing() throws Exception {
- File tempFile = null;
- try {
- tempFile = createTempFile();
- testMethodTracingToFile(tempFile);
- } finally {
- if (tempFile != null) {
- tempFile.delete();
- }
- }
- }
- private static void testMethodTracingToFile(File tempFile) throws Exception {
- String tempFileName = tempFile.getPath();
- if (VMDebug.getMethodTracingMode() != 0) {
- VMDebug.stopMethodTracing();
- }
- System.out.println("Confirm enable/disable");
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- VMDebug.stopMethodTracing();
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- if (tempFile.length() == 0) {
- System.out.println("ERROR: tracing output file is empty");
- }
- System.out.println("Confirm sampling");
- VMDebug.startMethodTracing(tempFileName, 0, 0, true, 1000);
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- VMDebug.stopMethodTracing();
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- if (tempFile.length() == 0) {
- System.out.println("ERROR: sample tracing output file is empty");
- }
- System.out.println("Test starting when already started");
- VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- System.out.println("Test stopping when already stopped");
- VMDebug.stopMethodTracing();
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- VMDebug.stopMethodTracing();
- System.out.println("status=" + VMDebug.getMethodTracingMode());
- System.out.println("Test tracing with empty filename");
- try {
- VMDebug.startMethodTracing("", 0, 0, false, 0);
- System.out.println("Should have thrown an exception");
- } catch (Exception e) {
- System.out.println("Got expected exception");
- }
- System.out.println("Test tracing with bogus (< 1024 && != 0) filesize");
- try {
- VMDebug.startMethodTracing(tempFileName, 1000, 0, false, 0);
- System.out.println("Should have thrown an exception");
- } catch (Exception e) {
- System.out.println("Got expected exception");
- }
- System.out.println("Test sampling with bogus (<= 0) interval");
- try {
- VMDebug.startMethodTracing(tempFileName, 0, 0, true, 0);
- System.out.println("Should have thrown an exception");
- } catch (Exception e) {
- System.out.println("Got expected exception");
- }
- tempFile.delete();
- }
- private static void checkNumber(String s) throws Exception {
- if (s == null) {
- System.out.println("Got null string");
- return;
- }
- long n = Long.parseLong(s);
- if (n < 0) {
- System.out.println("Got negative number " + n);
- }
- }
- private static void checkHistogram(String s) throws Exception {
- if (s == null || s.length() == 0) {
- System.out.println("Got null or empty string");
- return;
- }
- String[] buckets = s.split(",");
- long last_key = 0;
- for (int i = 0; i < buckets.length; ++i) {
- String bucket = buckets[i];
- if (bucket.length() == 0) {
- System.out.println("Got empty bucket");
- continue;
- }
- String[] kv = bucket.split(":");
- if (kv.length != 2 || kv[0].length() == 0 || kv[1].length() == 0) {
- System.out.println("Got bad bucket " + bucket);
- continue;
- }
- long key = Long.parseLong(kv[0]);
- long value = Long.parseLong(kv[1]);
- if (key < 0 || value < 0) {
- System.out.println("Got negative key or value " + bucket);
- continue;
- }
- if (key < last_key) {
- System.out.println("Got decreasing key " + bucket);
- continue;
- }
- last_key = key;
- }
- }
- private static void testRuntimeStat() throws Exception {
- // Invoke at least one GC and wait for 20 seconds or so so we get at
- // least one bucket in the histograms.
- for (int i = 0; i < 20; ++i) {
- Runtime.getRuntime().gc();
- Thread.sleep(1000L);
- }
- String gc_count = VMDebug.getRuntimeStat("art.gc.gc-count");
- String gc_time = VMDebug.getRuntimeStat("art.gc.gc-time");
- String bytes_allocated = VMDebug.getRuntimeStat("art.gc.bytes-allocated");
- String bytes_freed = VMDebug.getRuntimeStat("art.gc.bytes-freed");
- String blocking_gc_count = VMDebug.getRuntimeStat("art.gc.blocking-gc-count");
- String blocking_gc_time = VMDebug.getRuntimeStat("art.gc.blocking-gc-time");
- String gc_count_rate_histogram = VMDebug.getRuntimeStat("art.gc.gc-count-rate-histogram");
- String blocking_gc_count_rate_histogram =
- VMDebug.getRuntimeStat("art.gc.blocking-gc-count-rate-histogram");
- checkNumber(gc_count);
- checkNumber(gc_time);
- checkNumber(bytes_allocated);
- checkNumber(bytes_freed);
- checkNumber(blocking_gc_count);
- checkNumber(blocking_gc_time);
- checkHistogram(gc_count_rate_histogram);
- checkHistogram(blocking_gc_count_rate_histogram);
- }
- private static void testRuntimeStats() throws Exception {
- // Invoke at least one GC and wait for 20 seconds or so so we get at
- // least one bucket in the histograms.
- for (int i = 0; i < 20; ++i) {
- Runtime.getRuntime().gc();
- Thread.sleep(1000L);
- }
- Map<String, String> map = VMDebug.getRuntimeStats();
- String gc_count = map.get("art.gc.gc-count");
- String gc_time = map.get("art.gc.gc-time");
- String bytes_allocated = map.get("art.gc.bytes-allocated");
- String bytes_freed = map.get("art.gc.bytes-freed");
- String blocking_gc_count = map.get("art.gc.blocking-gc-count");
- String blocking_gc_time = map.get("art.gc.blocking-gc-time");
- String gc_count_rate_histogram = map.get("art.gc.gc-count-rate-histogram");
- String blocking_gc_count_rate_histogram =
- map.get("art.gc.blocking-gc-count-rate-histogram");
- checkNumber(gc_count);
- checkNumber(gc_time);
- checkNumber(bytes_allocated);
- checkNumber(bytes_freed);
- checkNumber(blocking_gc_count);
- checkNumber(blocking_gc_time);
- checkHistogram(gc_count_rate_histogram);
- checkHistogram(blocking_gc_count_rate_histogram);
- }
- static class ClassA { }
- static class ClassB { }
- static class ClassC extends ClassA { }
- private static void testCountInstances() throws Exception {
- ArrayList<Object> l = new ArrayList<Object>();
- l.add(new ClassA());
- l.add(new ClassB());
- l.add(new ClassA());
- l.add(new ClassC());
- Runtime.getRuntime().gc();
- System.out.println("Instances of ClassA " +
- VMDebug.countInstancesofClass(ClassA.class, false));
- System.out.println("Instances of ClassB " +
- VMDebug.countInstancesofClass(ClassB.class, false));
- System.out.println("Instances of null " + VMDebug.countInstancesofClass(null, false));
- System.out.println("Instances of ClassA assignable " +
- VMDebug.countInstancesofClass(ClassA.class, true));
- Class<?>[] classes = new Class<?>[] {ClassA.class, ClassB.class, null};
- long[] counts = VMDebug.countInstancesofClasses(classes, false);
- System.out.println("Array counts " + Arrays.toString(counts));
- counts = VMDebug.countInstancesofClasses(classes, true);
- System.out.println("Array counts assignable " + Arrays.toString(counts));
- }
- static class ClassD {
- public int mask;
- public ClassD(int mask) {
- this.mask = mask;
- }
- }
- static class ClassE extends ClassD {
- public ClassE(int mask) {
- super(mask);
- }
- }
- private static void testGetInstances() throws Exception {
- ArrayList<Object> l = new ArrayList<Object>();
- l.add(new ClassD(0x01));
- l.add(new ClassE(0x02));
- l.add(new ClassD(0x04));
- l.add(new ClassD(0x08));
- l.add(new ClassE(0x10));
- Runtime.getRuntime().gc();
- Class<?>[] classes = new Class<?>[] {ClassD.class, ClassE.class, null};
- Object[][] instances = VMDebug.getInstancesOfClasses(classes, false);
- int mask = 0;
- for (Object instance : instances[0]) {
- mask |= ((ClassD)instance).mask;
- }
- System.out.println("ClassD got " + instances[0].length + ", combined mask: " + mask);
- mask = 0;
- for (Object instance : instances[1]) {
- mask |= ((ClassD)instance).mask;
- }
- System.out.println("ClassE got " + instances[1].length + ", combined mask: " + mask);
- System.out.println("null got " + instances[2].length);
- instances = VMDebug.getInstancesOfClasses(classes, true);
- mask = 0;
- for (Object instance : instances[0]) {
- mask |= ((ClassD)instance).mask;
- }
- System.out.println("ClassD assignable got " + instances[0].length + ", combined mask: " + mask);
- mask = 0;
- for (Object instance : instances[1]) {
- mask |= ((ClassD)instance).mask;
- }
- System.out.println("ClassE assignable got " + instances[1].length + ", combined mask: " + mask);
- System.out.println("null assignable got " + instances[2].length);
- }
- private static class VMDebug {
- private static final Method startMethodTracingMethod;
- private static final Method stopMethodTracingMethod;
- private static final Method getMethodTracingModeMethod;
- private static final Method getRuntimeStatMethod;
- private static final Method getRuntimeStatsMethod;
- private static final Method countInstancesOfClassMethod;
- private static final Method countInstancesOfClassesMethod;
- private static final Method getInstancesOfClassesMethod;
- static {
- try {
- Class<?> c = Class.forName("dalvik.system.VMDebug");
- startMethodTracingMethod = c.getDeclaredMethod("startMethodTracing", String.class,
- Integer.TYPE, Integer.TYPE, Boolean.TYPE, Integer.TYPE);
- stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing");
- getMethodTracingModeMethod = c.getDeclaredMethod("getMethodTracingMode");
- getRuntimeStatMethod = c.getDeclaredMethod("getRuntimeStat", String.class);
- getRuntimeStatsMethod = c.getDeclaredMethod("getRuntimeStats");
- countInstancesOfClassMethod = c.getDeclaredMethod("countInstancesOfClass",
- Class.class, Boolean.TYPE);
- countInstancesOfClassesMethod = c.getDeclaredMethod("countInstancesOfClasses",
- Class[].class, Boolean.TYPE);
- getInstancesOfClassesMethod = c.getDeclaredMethod("getInstancesOfClasses",
- Class[].class, Boolean.TYPE);
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
- public static void startMethodTracing(String filename, int bufferSize, int flags,
- boolean samplingEnabled, int intervalUs) throws Exception {
- startMethodTracingMethod.invoke(null, filename, bufferSize, flags, samplingEnabled,
- intervalUs);
- }
- public static void stopMethodTracing() throws Exception {
- stopMethodTracingMethod.invoke(null);
- }
- public static int getMethodTracingMode() throws Exception {
- return (int) getMethodTracingModeMethod.invoke(null);
- }
- public static String getRuntimeStat(String statName) throws Exception {
- return (String) getRuntimeStatMethod.invoke(null, statName);
- }
- public static Map<String, String> getRuntimeStats() throws Exception {
- return (Map<String, String>) getRuntimeStatsMethod.invoke(null);
- }
- public static long countInstancesofClass(Class<?> c, boolean assignable) throws Exception {
- return (long) countInstancesOfClassMethod.invoke(null, new Object[]{c, assignable});
- }
- public static long[] countInstancesofClasses(Class<?>[] classes, boolean assignable)
- throws Exception {
- return (long[]) countInstancesOfClassesMethod.invoke(
- null, new Object[]{classes, assignable});
- }
- public static Object[][] getInstancesOfClasses(Class<?>[] classes, boolean assignable) throws Exception {
- return (Object[][]) getInstancesOfClassesMethod.invoke(
- null, new Object[]{classes, assignable});
- }
- }
- }