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com.sun.btrace.BTraceRuntime Maven / Gradle / Ivy
/*
* Copyright 2008-2010 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package com.sun.btrace;
import java.lang.management.ManagementFactory;
import static java.lang.management.ManagementFactory.*;
import java.lang.instrument.Instrumentation;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URI;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedExceptionAction;
import java.util.concurrent.Executors;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.LinkedBlockingQueue;
import com.sun.management.HotSpotDiagnosticMXBean;
import com.sun.btrace.aggregation.Aggregation;
import com.sun.btrace.aggregation.AggregationKey;
import com.sun.btrace.aggregation.AggregationFunction;
import com.sun.btrace.annotations.OnError;
import com.sun.btrace.annotations.OnExit;
import com.sun.btrace.annotations.OnTimer;
import com.sun.btrace.annotations.OnEvent;
import com.sun.btrace.annotations.OnLowMemory;
import com.sun.btrace.comm.Command;
import com.sun.btrace.comm.ErrorCommand;
import com.sun.btrace.comm.EventCommand;
import com.sun.btrace.comm.ExitCommand;
import com.sun.btrace.comm.MessageCommand;
import com.sun.btrace.comm.NumberDataCommand;
import com.sun.btrace.comm.NumberMapDataCommand;
import com.sun.btrace.comm.StringMapDataCommand;
import com.sun.btrace.comm.GridDataCommand;
import com.sun.btrace.profiling.MethodInvocationProfiler;
import java.lang.management.GarbageCollectorMXBean;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectOutputStream;
import java.lang.management.LockInfo;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryNotificationInfo;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.MemoryUsage;
import java.lang.management.MonitorInfo;
import java.lang.management.RuntimeMXBean;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ThreadFactory;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanServer;
import javax.management.Notification;
import javax.management.NotificationEmitter;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import sun.misc.Perf;
import sun.misc.Unsafe;
import sun.reflect.Reflection;
import sun.security.action.GetPropertyAction;
/**
* Helper class used by BTrace built-in functions and
* also acts runtime "manager" for a specific BTrace client
* and sends Commands to the CommandListener passed.
*
* @author A. Sundararajan
* @author Christian Glencross (aggregation support)
* @author Joachim Skeie (GC MBean support, advanced Deque manipulation)
* @author KLynch
*/
public final class BTraceRuntime {
// we need Unsafe to load BTrace class bytes as
// bootstrap class
private static final Unsafe unsafe = Unsafe.getUnsafe();
private static Properties dotWriterProps;
// a dummy BTraceRuntime instance
private static BTraceRuntime dummy;
private static BTraceRuntime NULL;
// are we running with DTrace support enabled?
private static boolean dtraceEnabled;
private static final boolean messageTimestamp = false;
private static final String LINE_SEPARATOR;
final private static Thread samplerThread;
volatile public static long TIMESTAMP = 0L;
static {
dummy = new BTraceRuntime();
NULL = new BTraceRuntime();
LINE_SEPARATOR = System.getProperty("line.separator");
if (Boolean.getBoolean("btrace.timer.sampled")) {
final long interval = Long.parseLong(System.getProperty("btrace.timer.sampled.interval", "500"));
long time = System.nanoTime();
for(int i=0;i<1000;i++) {
unsafe.park(false, interval);
}
time = System.nanoTime() - time;
final long step = (long)(time / 1000);
samplerThread = new Thread(new Runnable() {
public void run() {
while (true) {
unsafe.park(false, interval);
TIMESTAMP+=step;
}
}
}, "BTrace Sampled Timer");
samplerThread.setDaemon(true);
samplerThread.start();
} else {
samplerThread = null;
}
}
private static ThreadEnteredMap map = new ThreadEnteredMap(NULL);
// BTraceRuntime against BTrace class name
private static Map runtimes =
Collections.synchronizedMap(new HashMap());
// jvmstat related stuff
// to read and write perf counters
private static volatile Perf perf;
// interface to read perf counters of this process
private static volatile PerfReader perfReader;
// performance counters created by this client
private static Map counters =
new HashMap();
// Few MBeans used to implement certain built-in functions
private static volatile HotSpotDiagnosticMXBean hotspotMBean;
private static volatile MemoryMXBean memoryMBean;
private static volatile RuntimeMXBean runtimeMBean;
private static volatile ThreadMXBean threadMBean;
private static volatile List gcBeanList;
private static volatile List memPoolList;
// bytecode generator that generates Runnable implementations
private static RunnableGenerator runnableGenerator;
// Per-client state starts here.
// current thread's exception
private ThreadLocal currentException = new ThreadLocal();
// "command line" args supplied by client
private String[] args;
// whether current runtime has been disabled?
private volatile boolean disabled;
// Class object of the BTrace class [of this client]
private String className;
// BTrace Class object corresponding to this client
private Class clazz;
// does the client have exit action?
private Method exitHandler;
// does the client have exception handler action?
private Method exceptionHandler;
// array of timer callback methods
private Method[] timerHandlers;
// map of client event handling methods
private Map eventHandlers;
// low memory handlers
private Map lowMemHandlers;
// timer to run profile provider actions
private volatile Timer timer;
// executer to run low memory handlers
private volatile ExecutorService threadPool;
// Memory MBean listener
private volatile NotificationListener memoryListener;
// Command queue for the client
private volatile LinkedBlockingQueue queue;
private static class SpeculativeQueueManager {
// maximum number of speculative buffers
private static final int MAX_SPECULATIVE_BUFFERS = Short.MAX_VALUE;
// per buffer message limit
private static final int MAX_SPECULATIVE_MSG_LIMIT = Short.MAX_VALUE;
// next speculative buffer id
private int nextSpeculationId;
// speculative buffers map
private ConcurrentHashMap> speculativeQueues;
// per thread current speculative buffer id
private ThreadLocal currentSpeculationId;
SpeculativeQueueManager() {
speculativeQueues = new ConcurrentHashMap>();
currentSpeculationId = new ThreadLocal();
}
void clear() {
speculativeQueues.clear();
speculativeQueues = null;
currentSpeculationId.remove();
currentSpeculationId = null;
}
int speculation() {
int nextId = getNextSpeculationId();
if (nextId != -1) {
speculativeQueues.put(nextId,
new LinkedBlockingQueue(MAX_SPECULATIVE_MSG_LIMIT));
}
return nextId;
}
boolean send(Command cmd) {
Integer curId = currentSpeculationId.get();
if ((curId != null) && (cmd.getType() != Command.EXIT)) {
LinkedBlockingQueue sb = speculativeQueues.get(curId);
if (sb != null) {
try {
sb.add(cmd);
} catch (IllegalStateException ise) {
sb.clear();
sb.add(new MessageCommand("speculative buffer overflow: " + curId));
}
return true;
}
}
return false;
}
void speculate(int id) {
validateId(id);
currentSpeculationId.set(id);
}
void commit(int id, LinkedBlockingQueue result) {
validateId(id);
currentSpeculationId.set(null);
LinkedBlockingQueue sb = speculativeQueues.get(id);
if (sb != null) {
result.addAll(sb);
sb.clear();
}
}
void discard(int id) {
validateId(id);
currentSpeculationId.set(null);
speculativeQueues.get(id).clear();
}
// -- Internals only below this point
private synchronized int getNextSpeculationId() {
if (nextSpeculationId == MAX_SPECULATIVE_BUFFERS) {
return -1;
}
return nextSpeculationId++;
}
private void validateId(int id) {
if (! speculativeQueues.containsKey(id)) {
throw new RuntimeException("invalid speculative buffer id: " + id);
}
}
}
// per client speculative buffer manager
private volatile SpeculativeQueueManager specQueueManager;
// background thread that sends Commands to the handler
private volatile Thread cmdThread;
// CommandListener that receives the Commands
private volatile CommandListener cmdListener;
private Instrumentation instrumentation;
private BTraceRuntime() {
}
public BTraceRuntime(final String className, String[] args,
final CommandListener cmdListener,
Instrumentation inst) {
this.args = args;
this.queue = new LinkedBlockingQueue();
this.specQueueManager = new SpeculativeQueueManager();
this.cmdListener = cmdListener;
this.className = className;
this.instrumentation = inst;
runtimes.put(className, this);
this.cmdThread = new Thread(new Runnable() {
public void run() {
try {
BTraceRuntime.enter();
while (true) {
Command cmd = queue.take();
cmdListener.onCommand(cmd);
if (cmd.getType() == Command.EXIT) {
return;
}
}
} catch (InterruptedException ignored) {
} catch (IOException ignored) {
} finally {
runtimes.put(className, NULL);
queue.clear();
specQueueManager.clear();
BTraceRuntime.leave();
disabled = true;
}
}
});
cmdThread.setDaemon(true);
cmdThread.start();
}
public static boolean classNameExists(String name) {
return runtimes.containsKey(name);
}
public static void init(PerfReader perfRead, RunnableGenerator runGen) {
Class caller = Reflection.getCallerClass(2);
if (! caller.getName().equals("com.sun.btrace.agent.Client")) {
// workaround for "Reflection.getCallerClass(int)" problem
// in JDK7u25 - requiring one additional frame to get the caller
if (caller.getName().equals("com.sun.btrace.BTraceRuntime")) {
caller = Reflection.getCallerClass(3);
}
if (! caller.getName().equals("com.sun.btrace.agent.Client")) {
throw new SecurityException("unsafe init");
}
}
perfReader = perfRead;
runnableGenerator = runGen;
loadLibrary(perfRead.getClass().getClassLoader());
}
public Class defineClass(byte[] code) {
Class caller = Reflection.getCallerClass(2);
if (! caller.getName().equals("com.sun.btrace.agent.Client")) {
// workaround for "Reflection.getCallerClass(int)" problem
// in JDK7u25 - requiring one additional frame to get the caller
if (caller.getName().equals("com.sun.btrace.BTraceRuntime")) {
caller = Reflection.getCallerClass(3);
}
if (! caller.getName().equals("com.sun.btrace.agent.Client")) {
throw new SecurityException("unsafe defineClass");
}
}
return defineClassImpl(code, true);
}
public Class defineClass(byte[] code, boolean mustBeBootstrap) {
Class caller = Reflection.getCallerClass(2);
if (! caller.getName().equals("com.sun.btrace.agent.Client")) {
// workaround for "Reflection.getCallerClass(int)" problem
// in JDK7u25 - requiring one additional frame to get the caller
if (caller.getName().equals("com.sun.btrace.BTraceRuntime")) {
caller = Reflection.getCallerClass(3);
}
if (! caller.getName().equals("com.sun.btrace.agent.Client")) {
throw new SecurityException("unsafe defineClass");
}
}
return defineClassImpl(code, mustBeBootstrap);
}
/**
* Enter method is called by every probed method just
* before the probe actions start.
*/
public static boolean enter(BTraceRuntime current) {
if (current.disabled) return false;
return map.enter(current);
// // check we have entered already or disabled
// if (current.disabled || (tls.get() != null)) {
// return false;
// } else {
// tls.set(current);
// return true;
// }
}
public static boolean enter() {
return enter(dummy);
}
/**
* Leave method is called by every probed method just
* before the probe actions end (and actual probed
* method continues).
*/
public static void leave() {
map.exit();
// tls.remove();
}
/**
* start method is called by every BTrace (preprocesed) class
* just at the end of it's class initializer.
*/
public static void start() {
BTraceRuntime current = getCurrent();
if (current != null) {
current.startImpl();
}
}
public void handleExit(int exitCode) {
exitImpl(exitCode);
}
public void handleEvent(EventCommand ecmd) {
if (eventHandlers != null) {
String event = ecmd.getEvent();
Method eventHandler = eventHandlers.get(event);
if (eventHandler != null) {
// BTraceRuntime oldRuntime = tls.get();
BTraceRuntime oldRuntime = (BTraceRuntime)map.get();
leave();
try {
eventHandler.invoke(null, (Object[])null);
} catch (Throwable ignored) {
} finally {
if (oldRuntime != null) {
enter(oldRuntime);
}
}
}
}
}
/**
* One instance of BTraceRuntime is created per-client.
* This forClass method creates it. Class passed is the
* preprocessed BTrace program of the client.
*/
public static BTraceRuntime forClass(Class cl) {
BTraceRuntime runtime = runtimes.get(cl.getName());
runtime.init(cl);
return runtime;
}
/**
* Utility to create a new ThreadLocal object. Called
* by preprocessed BTrace class to create ThreadLocal
* for each @TLS variable.
* @param initValue Initial value.
* This value must be either a boxed primitive or {@linkplain Cloneable}.
* In case a {@linkplain Cloneable} value is provided the value is never used directly
* - instead, a new clone of the value is created per thread.
*/
public static ThreadLocal newThreadLocal(
final Object initValue) {
return new ThreadLocal() {
@Override
protected Object initialValue() {
if (initValue == null) return initValue;
if (initValue instanceof Cloneable) {
try {
Class clz = initValue.getClass();
Method m = clz.getDeclaredMethod("clone");
m.setAccessible(true);
return m.invoke(initValue);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
return initValue;
}
};
}
// The following constants are copied from VM code
// for jvmstat.
// perf counter variability - we always variable variability
private static final int V_Variable = 3;
// perf counter units
private static final int V_None = 1;
private static final int V_String = 5;
private static final int PERF_STRING_LIMIT = 256;
/**
* Utility to create a new jvmstat perf counter. Called
* by preprocessed BTrace class to create perf counter
* for each @Export variable.
*/
public static void newPerfCounter(String name, String desc, Object value) {
Perf perf = getPerf();
char tc = desc.charAt(0);
switch (tc) {
case 'C':
case 'Z':
case 'B':
case 'S':
case 'I':
case 'J':
case 'F':
case 'D': {
long initValue = (value != null)? ((Number)value).longValue() : 0L;
ByteBuffer b = perf.createLong(name, V_Variable, V_None, initValue);
b.order(ByteOrder.nativeOrder());
counters.put(name, b);
}
break;
case '[':
break;
case 'L': {
if (desc.equals("Ljava/lang/String;")) {
byte[] buf;
if (value != null) {
buf = getStringBytes((String)value);
} else {
buf = new byte[PERF_STRING_LIMIT];
buf[0] = '\0';
}
ByteBuffer b = perf.createByteArray(name, V_Variable, V_String,
buf, buf.length);
counters.put(name, b);
}
}
break;
}
}
/**
* Return the value of integer perf. counter of given name.
*/
public static int getPerfInt(String name) {
return (int) getPerfLong(name);
}
/**
* Write the value of integer perf. counter of given name.
*/
public static void putPerfInt(int value, String name) {
long l = (long)value;
putPerfLong(l, name);
}
/**
* Return the value of float perf. counter of given name.
*/
public static float getPerfFloat(String name) {
int val = getPerfInt(name);
return Float.intBitsToFloat(val);
}
/**
* Write the value of float perf. counter of given name.
*/
public static void putPerfFloat(float value, String name) {
int i = Float.floatToRawIntBits(value);
putPerfInt(i, name);
}
/**
* Return the value of long perf. counter of given name.
*/
public static long getPerfLong(String name) {
ByteBuffer b = counters.get(name);
synchronized(b) {
long l = b.getLong();
b.rewind();
return l;
}
}
/**
* Write the value of float perf. counter of given name.
*/
public static void putPerfLong(long value, String name) {
ByteBuffer b = counters.get(name);
synchronized (b) {
b.putLong(value);
b.rewind();
}
}
/**
* Return the value of double perf. counter of given name.
*/
public static double getPerfDouble(String name) {
long val = getPerfLong(name);
return Double.longBitsToDouble(val);
}
/**
* write the value of double perf. counter of given name.
*/
public static void putPerfDouble(double value, String name) {
long l = Double.doubleToRawLongBits(value);
putPerfLong(l, name);
}
/**
* Return the value of String perf. counter of given name.
*/
public static String getPerfString(String name) {
ByteBuffer b = counters.get(name);
byte[] buf = new byte[b.limit()];
byte t = (byte)0;
int i = 0;
synchronized (b) {
while ((t = b.get()) != '\0') {
buf[i++] = t;
}
b.rewind();
}
try {
return new String(buf, 0, i, "UTF-8");
} catch (java.io.UnsupportedEncodingException e) {
// ignore, UTF-8 encoding is always known
}
return "";
}
/**
* Write the value of float perf. counter of given name.
*/
public static void putPerfString(String value, String name) {
ByteBuffer b = counters.get(name);
byte[] v = getStringBytes(value);
synchronized (b) {
b.put(v);
b.rewind();
}
}
/**
* Handles exception from BTrace probe actions.
*/
public static void handleException(Throwable th) {
BTraceRuntime current = getCurrent();
if (current != null) {
current.handleExceptionImpl(th);
} else {
th.printStackTrace();
}
}
// package-private interface to BTraceUtils class.
static int speculation() {
BTraceRuntime current = getCurrent();
return current.specQueueManager.speculation();
}
static void speculate(int id) {
BTraceRuntime current = getCurrent();
current.specQueueManager.speculate(id);
}
static void discard(int id) {
BTraceRuntime current = getCurrent();
current.specQueueManager.discard(id);
}
static void commit(int id) {
BTraceRuntime current = getCurrent();
current.specQueueManager.commit(id, current.queue);
}
/**
* Indicates whether two given objects are "equal to" one another.
* For bootstrap classes, returns the result of calling Object.equals()
* override. For non-bootstrap classes, the reference identity comparison
* is done.
*
* @param obj1 first object to compare equality
* @param obj2 second object to compare equality
* @return true if the given objects are equal;
* false otherwise.
*/
static boolean compare(Object obj1, Object obj2) {
if (obj1 instanceof String) {
return obj1.equals(obj2);
} else if (obj1.getClass().getClassLoader() == null) {
if (obj2 == null || obj2.getClass().getClassLoader() == null) {
return obj1.equals(obj2);
} // else fall through..
}
return obj1 == obj2;
}
// BTrace map functions
static Map newHashMap() {
return new BTraceMap(new HashMap());
}
static Map newWeakMap() {
return new BTraceMap(new WeakHashMap());
}
static Deque newDeque() {
return new BTraceDeque(new ArrayDeque());
}
static Appendable newStringBuilder(boolean threadSafe) {
return threadSafe ? new StringBuffer() : new StringBuilder();
}
static Appendable newStringBuilder() {
return newStringBuilder(false);
}
static int size(Collection coll) {
if (coll instanceof BTraceCollection || coll.getClass().getClassLoader() == null) {
return coll.size();
} else {
throw new IllegalArgumentException();
}
}
public static boolean isEmpty(Collection coll) {
if (coll instanceof BTraceCollection || coll.getClass().getClassLoader() == null) {
return coll.isEmpty();
} else {
throw new IllegalArgumentException();
}
}
static boolean contains(Collection coll, Object obj) {
if (coll instanceof BTraceCollection || coll.getClass().getClassLoader() == null) {
for (E e : coll) {
if (compare(e, obj)) {
return true;
}
}
return false;
} else {
throw new IllegalArgumentException();
}
}
static Object[] toArray(Collection collection) {
if (collection == null) {
return new Object[0];
} else {
return collection.toArray();
}
}
static V get(Map map, Object key) {
if (map instanceof BTraceMap ||
map.getClass().getClassLoader() == null) {
return map.get(key);
} else {
throw new IllegalArgumentException();
}
}
static boolean containsKey(Map map, Object key) {
if (map instanceof BTraceMap ||
map.getClass().getClassLoader() == null) {
return map.containsKey(key);
} else {
throw new IllegalArgumentException();
}
}
static boolean containsValue(Map map, Object value) {
if (map instanceof BTraceMap ||
map.getClass().getClassLoader() == null) {
return map.containsValue(value);
} else {
throw new IllegalArgumentException();
}
}
static V put(Map map, K key, V value) {
if (map instanceof BTraceMap) {
return map.put(key, value);
} else {
throw new IllegalArgumentException("not a btrace map");
}
}
static V remove(Map map, Object key) {
if (map instanceof BTraceMap) {
return map.remove(key);
} else {
throw new IllegalArgumentException("not a btrace map");
}
}
static void clear(Map map) {
if (map instanceof BTraceMap) {
map.clear();
} else {
throw new IllegalArgumentException("not a btrace map");
}
}
static int size(Map map) {
if (map instanceof BTraceMap ||
map.getClass().getClassLoader() == null) {
return map.size();
} else {
throw new IllegalArgumentException();
}
}
static boolean isEmpty(Map map) {
if (map instanceof BTraceMap ||
map.getClass().getClassLoader() == null) {
return map.isEmpty();
} else {
throw new IllegalArgumentException();
}
}
static void putAll(Map src, Map dst) {
dst.putAll(src);
}
static void copy(Map src, Map dst) {
dst.clear();
dst.putAll(src);
}
static void printMap(Map map) {
if (map instanceof BTraceMap ||
map.getClass().getClassLoader() == null) {
synchronized(map) {
Map m = new HashMap();
Set> entries = map.entrySet();
for (Map.Entry e : entries) {
m.put(BTraceUtils.Strings.str(e.getKey()), BTraceUtils.Strings.str(e.getValue()));
}
printStringMap(null, m);
}
} else {
print(BTraceUtils.Strings.str(map));
}
}
public static void push(Deque queue, V value) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
queue.push(value);
} else {
throw new IllegalArgumentException();
}
}
public static void addLast(Deque queue, V value) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
queue.addLast(value);
} else {
throw new IllegalArgumentException();
}
}
public static V peekFirst(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
return queue.peekFirst();
} else {
throw new IllegalArgumentException();
}
}
public static V peekLast(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
return queue.peekLast();
} else {
throw new IllegalArgumentException();
}
}
public static V removeLast(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
return queue.removeLast();
} else {
throw new IllegalArgumentException();
}
}
public static V removeFirst(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
return queue.removeFirst();
} else {
throw new IllegalArgumentException();
}
}
public static V poll(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
return queue.poll();
} else {
throw new IllegalArgumentException();
}
}
public static V peek(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
return queue.peek();
} else {
throw new IllegalArgumentException();
}
}
public static void clear(Deque queue) {
if (queue instanceof BTraceDeque || queue.getClass().getClassLoader() == null) {
queue.clear();
} else {
throw new IllegalArgumentException();
}
}
public static Appendable append(Appendable buffer, String strToAppend) {
try {
if (buffer != null && strToAppend != null) {
return buffer.append(strToAppend);
} else {
throw new IllegalArgumentException();
}
} catch (IOException e) {
throw new IllegalArgumentException(e);
}
}
public static int length(Appendable buffer) {
if (buffer != null && buffer instanceof CharSequence) {
return ((CharSequence)buffer).length();
} else {
throw new IllegalArgumentException();
}
}
static void printNumber(String name, Number value) {
getCurrent().send(new NumberDataCommand(name, value));
}
static void printNumberMap(String name, Map data) {
getCurrent().send(new NumberMapDataCommand(name, data));
}
static void printStringMap(String name, Map data) {
getCurrent().send(new StringMapDataCommand(name, data));
}
// BTrace exit built-in function
static void exit(int exitCode) {
BTraceRuntime runtime = getCurrent();
if (runtime != null) {
Throwable th = runtime.currentException.get();
if (! (th instanceof ExitException)) {
runtime.currentException.set(null);
}
throw new ExitException(exitCode);
}
}
public static void retransform(String runtimeName, Class clazz) {
try {
BTraceRuntime rt = runtimes.get(runtimeName);
if (rt != null && rt.instrumentation.isModifiableClass(clazz)) {
rt.instrumentation.retransformClasses(clazz);
}
} catch (Exception e) {
e.printStackTrace();
}
}
static long sizeof(Object obj) {
BTraceRuntime runtime = getCurrent();
return runtime.instrumentation.getObjectSize(obj);
}
// BTrace command line argument functions
static int $length() {
BTraceRuntime runtime = getCurrent();
return runtime.args == null? 0 : runtime.args.length;
}
static String $(int n) {
BTraceRuntime runtime = getCurrent();
if (runtime.args == null) {
return null;
} else {
if (n >= 0 && n < runtime.args.length) {
return runtime.args[n];
} else {
return null;
}
}
}
private final static class BTraceAtomicInteger extends AtomicInteger {
BTraceAtomicInteger(int initVal) {
super(initVal);
}
}
static AtomicInteger newAtomicInteger(int initVal) {
return new BTraceAtomicInteger(initVal);
}
static int get(AtomicInteger ai) {
if (ai instanceof BTraceAtomicInteger ||
ai.getClass().getClassLoader() == null) {
return ai.get();
} else {
throw new IllegalArgumentException();
}
}
static void set(AtomicInteger ai, int i) {
if (ai instanceof BTraceAtomicInteger) {
ai.set(i);
} else {
throw new IllegalArgumentException();
}
}
static void lazySet(AtomicInteger ai, int i) {
if (ai instanceof BTraceAtomicInteger) {
ai.lazySet(i);
} else {
throw new IllegalArgumentException();
}
}
static boolean compareAndSet(AtomicInteger ai, int i, int j) {
if (ai instanceof BTraceAtomicInteger) {
return ai.compareAndSet(i, j);
} else {
throw new IllegalArgumentException();
}
}
static boolean weakCompareAndSet(AtomicInteger ai, int i, int j) {
if (ai instanceof BTraceAtomicInteger) {
return ai.weakCompareAndSet(i, j);
} else {
throw new IllegalArgumentException();
}
}
static int getAndIncrement(AtomicInteger ai) {
if (ai instanceof BTraceAtomicInteger) {
return ai.getAndIncrement();
} else {
throw new IllegalArgumentException();
}
}
static int getAndDecrement(AtomicInteger ai) {
if (ai instanceof BTraceAtomicInteger) {
return ai.getAndDecrement();
} else {
throw new IllegalArgumentException();
}
}
static int incrementAndGet(AtomicInteger ai) {
if (ai instanceof BTraceAtomicInteger) {
return ai.incrementAndGet();
} else {
throw new IllegalArgumentException();
}
}
static int decrementAndGet(AtomicInteger ai) {
if (ai instanceof BTraceAtomicInteger) {
return ai.decrementAndGet();
} else {
throw new IllegalArgumentException();
}
}
static int getAndAdd(AtomicInteger ai, int i) {
if (ai instanceof BTraceAtomicInteger) {
return ai.getAndAdd(i);
} else {
throw new IllegalArgumentException();
}
}
static int addAndGet(AtomicInteger ai, int i) {
if (ai instanceof BTraceAtomicInteger) {
return ai.addAndGet(i);
} else {
throw new IllegalArgumentException();
}
}
static int getAndSet(AtomicInteger ai, int i) {
if (ai instanceof BTraceAtomicInteger) {
return ai.getAndSet(i);
} else {
throw new IllegalArgumentException();
}
}
private final static class BTraceAtomicLong extends AtomicLong {
BTraceAtomicLong(long initVal) {
super(initVal);
}
}
static AtomicLong newAtomicLong(long initVal) {
return new BTraceAtomicLong(initVal);
}
static long get(AtomicLong al) {
if (al instanceof BTraceAtomicLong ||
al.getClass().getClassLoader() == null) {
return al.get();
} else {
throw new IllegalArgumentException();
}
}
static void set(AtomicLong al, long i) {
if (al instanceof BTraceAtomicLong) {
al.set(i);
} else {
throw new IllegalArgumentException();
}
}
static void lazySet(AtomicLong al, long i) {
if (al instanceof BTraceAtomicLong) {
al.lazySet(i);
} else {
throw new IllegalArgumentException();
}
}
static boolean compareAndSet(AtomicLong al, long i, long j) {
if (al instanceof BTraceAtomicLong) {
return al.compareAndSet(i, j);
} else {
throw new IllegalArgumentException();
}
}
static boolean weakCompareAndSet(AtomicLong al, long i, long j) {
if (al instanceof BTraceAtomicLong) {
return al.weakCompareAndSet(i, j);
} else {
throw new IllegalArgumentException();
}
}
static long getAndIncrement(AtomicLong al) {
if (al instanceof BTraceAtomicLong) {
return al.getAndIncrement();
} else {
throw new IllegalArgumentException();
}
}
static long getAndDecrement(AtomicLong al) {
if (al instanceof BTraceAtomicLong) {
return al.getAndDecrement();
} else {
throw new IllegalArgumentException();
}
}
static long incrementAndGet(AtomicLong al) {
if (al instanceof BTraceAtomicLong) {
return al.incrementAndGet();
} else {
throw new IllegalArgumentException();
}
}
static long decrementAndGet(AtomicLong al) {
if (al instanceof BTraceAtomicLong) {
return al.decrementAndGet();
} else {
throw new IllegalArgumentException();
}
}
static long getAndAdd(AtomicLong al, long i) {
if (al instanceof BTraceAtomicLong) {
return al.getAndAdd(i);
} else {
throw new IllegalArgumentException();
}
}
static long addAndGet(AtomicLong al, long i) {
if (al instanceof BTraceAtomicLong) {
return al.addAndGet(i);
} else {
throw new IllegalArgumentException();
}
}
static long getAndSet(AtomicLong al, long i) {
if (al instanceof BTraceAtomicLong) {
return al.getAndSet(i);
} else {
throw new IllegalArgumentException();
}
}
// BTrace perf counter reading functions
static int perfInt(String name) {
return getPerfReader().perfInt(name);
}
static long perfLong(String name) {
return getPerfReader().perfLong(name);
}
static String perfString(String name) {
return getPerfReader().perfString(name);
}
// the number of stack frames taking a thread dump adds
private static final int THRD_DUMP_FRAMES = 1;
// stack trace functions
private static String stackTraceAllStr(int numFrames, boolean printWarning) {
Set> traces =
Thread.getAllStackTraces().entrySet();
StringBuilder buf = new StringBuilder();
for (Map.Entry t : traces) {
buf.append(t.getKey().toString());
buf.append(LINE_SEPARATOR);
buf.append(LINE_SEPARATOR);
StackTraceElement[] st = t.getValue();
buf.append(stackTraceStr("\t", st, 0, numFrames, printWarning));
buf.append(LINE_SEPARATOR);
}
return buf.toString();
}
static String stackTraceAllStr(int numFrames) {
return stackTraceAllStr(numFrames, false);
}
static void stackTraceAll(int numFrames) {
getCurrent().send(stackTraceAllStr(numFrames, true));
}
static String stackTraceStr(StackTraceElement[] st,
int strip, int numFrames) {
return stackTraceStr(null, st, strip, numFrames, false);
}
static String stackTraceStr(String prefix, StackTraceElement[] st,
int strip, int numFrames) {
return stackTraceStr(prefix, st, strip, numFrames, false);
}
private static String stackTraceStr(String prefix, StackTraceElement[] st,
int strip, int numFrames, boolean printWarning) {
strip = strip > 0 ? strip + THRD_DUMP_FRAMES : 0;
numFrames = numFrames > 0 ? numFrames : st.length - strip;
int limit = strip + numFrames;
limit = limit <= st.length ? limit : st.length;
if (prefix == null) { prefix = ""; }
StringBuilder buf = new StringBuilder();
for (int i = strip; i < limit; i++) {
buf.append(prefix);
buf.append(st[i].toString());
buf.append(LINE_SEPARATOR);
}
if (printWarning && limit < st.length) {
buf.append(prefix);
buf.append(st.length - limit);
buf.append(" more frame(s) ...");
buf.append(LINE_SEPARATOR);
}
return buf.toString();
}
static void stackTrace(StackTraceElement[] st,
int strip, int numFrames) {
stackTrace(null, st, strip, numFrames);
}
static void stackTrace(String prefix, StackTraceElement[] st,
int strip, int numFrames) {
getCurrent().send(stackTraceStr(prefix, st, strip, numFrames, true));
}
// print/println functions
static void print(String str) {
getCurrent().send(str);
}
static void println(String str) {
getCurrent().send(str + LINE_SEPARATOR);
}
static void println() {
getCurrent().send(LINE_SEPARATOR);
}
static String property(String name) {
return AccessController.doPrivileged(
new GetPropertyAction(name));
}
static Properties properties() {
return AccessController.doPrivileged(
new PrivilegedAction() {
public Properties run() {
return System.getProperties();
}
}
);
}
static String getenv(final String name) {
return AccessController.doPrivileged(
new PrivilegedAction() {
public String run() {
return System.getenv(name);
}
}
);
}
static Map getenv() {
return AccessController.doPrivileged(
new PrivilegedAction>() {
public Map run() {
return System.getenv();
}
}
);
}
static MemoryUsage heapUsage() {
initMemoryMBean();
return memoryMBean.getHeapMemoryUsage();
}
static MemoryUsage nonHeapUsage() {
initMemoryMBean();
return memoryMBean.getNonHeapMemoryUsage();
}
static long finalizationCount() {
initMemoryMBean();
return memoryMBean.getObjectPendingFinalizationCount();
}
static long vmStartTime() {
initRuntimeMBean();
return runtimeMBean.getStartTime();
}
static long vmUptime() {
initRuntimeMBean();
return runtimeMBean.getUptime();
}
static List getInputArguments() {
initRuntimeMBean();
return runtimeMBean.getInputArguments();
}
static String getVmVersion() {
initRuntimeMBean();
return runtimeMBean.getVmVersion();
}
static boolean isBootClassPathSupported() {
initRuntimeMBean();
return runtimeMBean.isBootClassPathSupported();
}
static String getBootClassPath() {
initRuntimeMBean();
return runtimeMBean.getBootClassPath();
}
static long getThreadCount() {
initThreadMBean();
return threadMBean.getThreadCount();
}
static long getPeakThreadCount() {
initThreadMBean();
return threadMBean.getPeakThreadCount();
}
static long getTotalStartedThreadCount() {
initThreadMBean();
return threadMBean.getTotalStartedThreadCount();
}
static long getDaemonThreadCount() {
initThreadMBean();
return threadMBean.getDaemonThreadCount();
}
static long getCurrentThreadCpuTime() {
initThreadMBean();
threadMBean.setThreadCpuTimeEnabled(true);
return threadMBean.getCurrentThreadCpuTime();
}
static long getCurrentThreadUserTime() {
initThreadMBean();
threadMBean.setThreadCpuTimeEnabled(true);
return threadMBean.getCurrentThreadUserTime();
}
static void dumpHeap(String fileName, boolean live) {
initHotspotMBean();
try {
String name = resolveFileName(fileName);
hotspotMBean.dumpHeap(name, live);
} catch (RuntimeException re) {
throw re;
} catch (Exception exp) {
throw new RuntimeException(exp);
}
}
static long getTotalGcTime() {
initGarbageCollectionBeans();
long totalGcTime = 0;
for (GarbageCollectorMXBean gcBean : gcBeanList) {
totalGcTime += gcBean.getCollectionTime();
}
return totalGcTime;
}
static String getMemoryPoolUsage(String poolFormat) {
if (poolFormat == null) {
poolFormat = "%1$s;%2$d;%3$d;%4$d;%5$d";
}
Object[][] poolOutput = new Object[memPoolList.size()][5];
StringBuilder membuffer = new StringBuilder();
for (int i = 0; i < memPoolList.size(); i++) {
MemoryPoolMXBean memPool = memPoolList.get(i);
poolOutput[i][0] = memPool.getName();
poolOutput[i][1] = new Long(memPool.getUsage().getMax());
poolOutput[i][2] = new Long(memPool.getUsage().getUsed());
poolOutput[i][3] = new Long(memPool.getUsage().getCommitted());
poolOutput[i][4] = new Long(memPool.getUsage().getInit());
}
for (Object[] memPoolOutput : poolOutput) {
membuffer.append(String.format(poolFormat, memPoolOutput)).append("\n");
}
return membuffer.toString();
}
static void serialize(Object obj, String fileName) {
try {
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream(resolveFileName(fileName)));
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(obj);
oos.close();
} catch (RuntimeException re) {
throw re;
} catch (Exception exp) {
throw new RuntimeException(exp);
}
}
static String toXML(Object obj) {
try {
return XMLSerializer.toXML(obj);
} catch (RuntimeException re) {
throw re;
} catch (Exception exp) {
throw new RuntimeException(exp);
}
}
static void writeXML(Object obj, String fileName) {
try {
BufferedWriter bw = new BufferedWriter(
new FileWriter(resolveFileName(fileName)));
XMLSerializer.write(obj, bw);
bw.close();
} catch (RuntimeException re) {
throw re;
} catch (Exception exp) {
throw new RuntimeException(exp);
}
}
private synchronized static void initDOTWriterProps() {
if (dotWriterProps == null) {
dotWriterProps = new Properties();
InputStream is = BTraceRuntime.class.getResourceAsStream("resources/btrace.dotwriter.properties");
if (is != null) {
try {
dotWriterProps.load(is);
} catch (IOException ioExp) {
ioExp.printStackTrace();
}
}
try {
String home = System.getProperty("user.home");
File file = new File(home, "btrace.dotwriter.properties");
if (file.exists() && file.isFile()) {
is = new BufferedInputStream(new FileInputStream(file));
if (is != null) {
dotWriterProps.load(is);
}
}
} catch (Exception exp) {
exp.printStackTrace();
}
}
}
static void writeDOT(Object obj, String fileName) {
DOTWriter writer = new DOTWriter(resolveFileName(fileName));
initDOTWriterProps();
writer.customize(dotWriterProps);
writer.addNode(null, obj);
writer.close();
}
private static String INDENT = " ";
static void deadlocks(boolean stackTrace) {
initThreadMBean();
if (threadMBean.isSynchronizerUsageSupported()) {
long[] tids = threadMBean.findDeadlockedThreads();
if (tids != null && tids.length > 0) {
ThreadInfo[] infos = threadMBean.getThreadInfo(tids, true, true);
StringBuilder sb = new StringBuilder();
for (ThreadInfo ti : infos) {
sb.append("\"" + ti.getThreadName() + "\"" +
" Id=" + ti.getThreadId() +
" in " + ti.getThreadState());
if (ti.getLockName() != null) {
sb.append(" on lock=" + ti.getLockName());
}
if (ti.isSuspended()) {
sb.append(" (suspended)");
}
if (ti.isInNative()) {
sb.append(" (running in native)");
}
if (ti.getLockOwnerName() != null) {
sb.append(INDENT + " owned by " +
ti.getLockOwnerName() +
" Id=" + ti.getLockOwnerId());
sb.append(LINE_SEPARATOR);
}
if (stackTrace) {
// print stack trace with locks
StackTraceElement[] stacktrace = ti.getStackTrace();
MonitorInfo[] monitors = ti.getLockedMonitors();
for (int i = 0; i < stacktrace.length; i++) {
StackTraceElement ste = stacktrace[i];
sb.append(INDENT + "at " + ste.toString());
sb.append(LINE_SEPARATOR);
for (MonitorInfo mi : monitors) {
if (mi.getLockedStackDepth() == i) {
sb.append(INDENT + " - locked " + mi);
sb.append(LINE_SEPARATOR);
}
}
}
sb.append(LINE_SEPARATOR);
}
LockInfo[] locks = ti.getLockedSynchronizers();
sb.append(INDENT + "Locked synchronizers: count = " + locks.length);
sb.append(LINE_SEPARATOR);
for (LockInfo li : locks) {
sb.append(INDENT + " - " + li);
sb.append(LINE_SEPARATOR);
}
sb.append(LINE_SEPARATOR);
}
getCurrent().send(sb.toString());
}
}
}
static int dtraceProbe(String s1, String s2, int i1, int i2) {
if (dtraceEnabled) {
return dtraceProbe0(s1, s2, i1, i2);
} else {
return 0;
}
}
// BTrace aggregation support
static Aggregation newAggregation(AggregationFunction type) {
return new Aggregation(type);
}
static AggregationKey newAggregationKey(Object... elements) {
return new AggregationKey(elements);
}
static void addToAggregation(Aggregation aggregation, long value) {
aggregation.add(value);
}
static void addToAggregation(Aggregation aggregation, AggregationKey key, long value) {
aggregation.add(key, value);
}
static void clearAggregation(Aggregation aggregation) {
aggregation.clear();
}
static void truncateAggregation(Aggregation aggregation, int count) {
aggregation.truncate(count);
}
static void printAggregation(String name, Aggregation aggregation) {
getCurrent().send(new GridDataCommand(name, aggregation.getData()));
}
static void printSnapshot(String name, Profiler.Snapshot snapshot) {
getCurrent().send(new GridDataCommand(name, snapshot.getGridData()));
}
/**
* Prints profiling snapshot using the provided format
* @param name The name of the aggregation to be used in the textual output
* @param snapshot The snapshot to print
* @param format The format to use. It mimics {@linkplain String#format(java.lang.String, java.lang.Object[]) } behaviour
* with the addition of the ability to address the key title as a 0-indexed item
* @see String#format(java.lang.String, java.lang.Object[])
*/
static void printSnapshot(String name, Profiler.Snapshot snapshot, String format) {
getCurrent().send(new GridDataCommand(name, snapshot.getGridData(), format));
}
/**
* Precondition: Only values from the first Aggregation are printed. If the subsequent aggregations have
* values for keys which the first aggregation does not have, these rows are ignored.
* @param name
* @param format
* @param aggregationArray
*/
static void printAggregation(String name, String format, Aggregation[] aggregationArray) {
if (aggregationArray.length > 1 && aggregationArray[0].getKeyData().size() > 1) {
int aggregationDataSize = aggregationArray[0].getKeyData().get(0).getElements().length + aggregationArray.length;
List aggregationData = new ArrayList();
//Iterate through all keys in the first Aggregation and build up an array of aggregationData
for (AggregationKey aggKey : aggregationArray[0].getKeyData()) {
int aggDataIndex = 0;
Object[] currAggregationData = new Object[aggregationDataSize];
//Add the key to the from of the current aggregation Data
for (Object obj : aggKey.getElements()) {
currAggregationData[aggDataIndex] = obj;
aggDataIndex++;
}
for (Aggregation agg : aggregationArray) {
currAggregationData[aggDataIndex] = agg.getValueForKey(aggKey);
aggDataIndex++;
}
aggregationData.add(currAggregationData);
}
getCurrent().send(new GridDataCommand(name, aggregationData, format));
}
}
/**
* Prints aggregation using the provided format
* @param name The name of the aggregation to be used in the textual output
* @param aggregation The aggregation to print
* @param format The format to use. It mimics {@linkplain String#format(java.lang.String, java.lang.Object[]) } behaviour
* with the addition of the ability to address the key title as a 0-indexed item
* @see String#format(java.lang.String, java.lang.Object[])
*/
static void printAggregation(String name, Aggregation aggregation, String format) {
getCurrent().send(new GridDataCommand(name, aggregation.getData(), format));
}
// profiling related methods
/**
* @see BTraceUtils.Profiling#newProfiler()
*/
static Profiler newProfiler() {
return new MethodInvocationProfiler(600);
}
/**
* @see BTraceUtils.Profiling#newProfiler(int)
*/
static Profiler newProfiler(int expectedMethodCnt) {
return new MethodInvocationProfiler(expectedMethodCnt);
}
/**
* @see BTraceUtils.Profiling#recordEntry(com.sun.btrace.Profiler, java.lang.String)
*/
static void recordEntry(Profiler profiler, String methodName) {
profiler.recordEntry(methodName);
}
/**
* @see BTraceUtils.Profiling#recordExit(com.sun.btrace.Profiler, java.lang.String, long)
*/
static void recordExit(Profiler profiler, String methodName, long duration) {
profiler.recordExit(methodName, duration);
}
/**
* @see BTraceUtils.Profiling#snapshot(com.sun.btrace.Profiler)
*/
static Profiler.Snapshot snapshot(Profiler profiler) {
return profiler.snapshot();
}
/**
* @see BTraceUtils.Profiling#snapshotAndReset(com.sun.btrace.Profiler)
*/
static Profiler.Snapshot snapshotAndReset(Profiler profiler) {
return profiler.snapshot(true);
}
static void resetProfiler(Profiler profiler) {
profiler.reset();
}
// private methods below this point
// raise DTrace USDT probe
private static native int dtraceProbe0(String s1, String s2, int i1, int i2);
private static final String HOTSPOT_BEAN_NAME =
"com.sun.management:type=HotSpotDiagnostic";
/**
* Get the current thread BTraceRuntime instance
* if there is one.
*/
private static BTraceRuntime getCurrent() {
// BTraceRuntime current = tls.get();
BTraceRuntime current = (BTraceRuntime)map.get();
assert current != null : "BTraceRuntime is null!";
return current;
}
private void initThreadPool() {
if (threadPool == null) {
synchronized (this) {
if (threadPool == null) {
threadPool = Executors.newFixedThreadPool(1,
new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread th = new Thread(r);
th.setDaemon(true);
return th;
}
});
}
}
}
}
private static void initHotspotMBean() {
if (hotspotMBean == null) {
synchronized (BTraceRuntime.class) {
if (hotspotMBean == null) {
hotspotMBean = getHotspotMBean();
}
}
}
}
private static HotSpotDiagnosticMXBean getHotspotMBean() {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public HotSpotDiagnosticMXBean run() throws Exception {
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
Set s = server.queryNames(new ObjectName(HOTSPOT_BEAN_NAME), null);
Iterator itr = s.iterator();
if (itr.hasNext()) {
ObjectName name = itr.next();
HotSpotDiagnosticMXBean bean =
ManagementFactory.newPlatformMXBeanProxy(server,
name.toString(), HotSpotDiagnosticMXBean.class);
return bean;
} else {
return null;
}
}
});
} catch (Exception exp) {
throw new UnsupportedOperationException(exp);
}
}
private static void initMemoryMBean() {
if (memoryMBean == null) {
synchronized (BTraceRuntime.class) {
if (memoryMBean == null) {
memoryMBean = getMemoryMBean();
}
}
}
}
private void initMemoryListener() {
initThreadPool();
memoryListener = new NotificationListener() {
public void handleNotification(Notification notif, Object handback) {
String notifType = notif.getType();
if (notifType.equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED)) {
CompositeData cd = (CompositeData) notif.getUserData();
final MemoryNotificationInfo info = MemoryNotificationInfo.from(cd);
String name = info.getPoolName();
final Method handler = lowMemHandlers.get(name);
if (handler != null) {
threadPool.submit(new Runnable() {
public void run() {
try {
if (handler.getParameterTypes().length == 1) {
handler.invoke(null, info.getUsage());
} else {
handler.invoke(null, (Object[])null);
}
} catch (Throwable th) { }
}
});
}
}
}
};
}
private static MemoryMXBean getMemoryMBean() {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public MemoryMXBean run() throws Exception {
return ManagementFactory.getMemoryMXBean();
}
});
} catch (Exception exp) {
throw new UnsupportedOperationException(exp);
}
}
private static void initRuntimeMBean() {
if (runtimeMBean == null) {
synchronized (BTraceRuntime.class) {
if (runtimeMBean == null) {
runtimeMBean = getRuntimeMBean();
}
}
}
}
private static RuntimeMXBean getRuntimeMBean() {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public RuntimeMXBean run() throws Exception {
return ManagementFactory.getRuntimeMXBean();
}
});
} catch (Exception exp) {
throw new UnsupportedOperationException(exp);
}
}
private static void initThreadMBean() {
if (threadMBean == null) {
synchronized (BTraceRuntime.class) {
if (threadMBean == null) {
threadMBean = getThreadMBean();
}
}
}
}
private static ThreadMXBean getThreadMBean() {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public ThreadMXBean run() throws Exception {
return ManagementFactory.getThreadMXBean();
}
});
} catch (Exception exp) {
throw new UnsupportedOperationException(exp);
}
}
private static List getMemoryPoolMXBeans() {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction>() {
public List run() throws Exception {
return ManagementFactory.getMemoryPoolMXBeans();
}
});
} catch (Exception exp) {
throw new UnsupportedOperationException(exp);
}
}
private static List getGarbageCollectionMBeans() {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction>() {
public List run() throws Exception {
return ManagementFactory.getGarbageCollectorMXBeans();
}
});
} catch (Exception exp) {
throw new UnsupportedOperationException(exp);
}
}
private static void initGarbageCollectionBeans() {
if (gcBeanList == null) {
synchronized (BTraceRuntime.class) {
if (gcBeanList == null) {
gcBeanList = getGarbageCollectionMBeans();
}
}
}
}
private static void initMemoryPoolList() {
if (memPoolList == null) {
synchronized (BTraceRuntime.class) {
if (memPoolList == null) {
memPoolList = getMemoryPoolMXBeans();
}
}
}
}
private static PerfReader getPerfReader() {
if (perfReader == null) {
throw new UnsupportedOperationException();
}
return perfReader;
}
private static RunnableGenerator getRunnableGenerator() {
return runnableGenerator;
}
private void send(String msg) {
send(new MessageCommand(messageTimestamp? System.nanoTime() : 0L,
msg));
}
public void send(Command cmd) {
try {
boolean speculated = specQueueManager.send(cmd);
if (! speculated) {
queue.put(cmd);
}
} catch (InterruptedException ie) {
ie.printStackTrace();
}
}
private void handleExceptionImpl(Throwable th) {
if (currentException.get() != null) {
return;
}
leave();
currentException.set(th);
try {
if (th instanceof ExitException) {
exitImpl(((ExitException)th).exitCode());
} else {
if (exceptionHandler != null) {
try {
exceptionHandler.invoke(null, th);
} catch (Throwable ignored) {
}
} else {
try {
// Do not call send(Command). Exception messages should not
// go to speculative buffers!
queue.put(new ErrorCommand(th));
} catch (InterruptedException ie) {
ie.printStackTrace();
}
}
}
} finally {
currentException.set(null);
}
}
private void startImpl() {
if (timerHandlers != null && timerHandlers.length != 0) {
timer = new Timer(true);
RunnableGenerator gen = getRunnableGenerator();
Runnable[] runnables = new Runnable[timerHandlers.length];
if (gen != null) {
generateRunnables(gen, runnables);
} else {
wrapToRunnables(runnables);
}
for (int index = 0; index < timerHandlers.length; index++) {
Method m = timerHandlers[index];
OnTimer tp = m.getAnnotation(OnTimer.class);
long period = tp.value();
final Runnable r = runnables[index];
timer.schedule(new TimerTask() {
public void run() { r.run(); }
}, period, period);
}
}
if (! lowMemHandlers.isEmpty()) {
initMemoryMBean();
initMemoryListener();
NotificationEmitter emitter = (NotificationEmitter) memoryMBean;
emitter.addNotificationListener(memoryListener, null, null);
}
leave();
}
private void generateRunnables(RunnableGenerator gen, Runnable[] runnables) {
final MemoryClassLoader loader = AccessController.doPrivileged(
new PrivilegedAction() {
public MemoryClassLoader run() {
return new MemoryClassLoader(clazz.getClassLoader());
}
});
for (int index = 0; index < timerHandlers.length; index++) {
Method m = timerHandlers[index];
try {
final String className = "com/sun/btrace/BTraceRunnable$" + index;
final byte[] buf = gen.generate(m, className);
Class cls = AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public Class run() throws Exception {
return loader.loadClass(className.replace('/', '.'), buf);
}
});
runnables[index] = (Runnable) cls.newInstance();
} catch (RuntimeException re) {
throw re;
} catch (Exception exp) {
throw new RuntimeException(exp);
}
}
}
private void wrapToRunnables(Runnable[] runnables) {
for (int index = 0; index < timerHandlers.length; index++) {
final Method m = timerHandlers[index];
runnables[index] = new Runnable() {
public void run() {
try {
m.invoke(null, (Object[])null);
} catch (Throwable th) {
}
}
};
}
}
private synchronized void exitImpl(int exitCode) {
if (exitHandler != null) {
try {
exitHandler.invoke(null, exitCode);
} catch (Throwable ignored) {
}
}
disabled = true;
if (timer != null) {
timer.cancel();
}
if (memoryListener != null && memoryMBean != null) {
NotificationEmitter emitter = (NotificationEmitter) memoryMBean;
try {
emitter.removeNotificationListener(memoryListener);
} catch (ListenerNotFoundException lnfe) {}
}
if (threadPool != null) {
threadPool.shutdownNow();
}
send(new ExitCommand(exitCode));
}
private static Perf getPerf() {
if (perf == null) {
synchronized(BTraceRuntime.class) {
if (perf == null) {
perf = (Perf) AccessController.doPrivileged(new Perf.GetPerfAction());
}
}
}
return perf;
}
private static byte[] getStringBytes(String value) {
byte[] v = null;
try {
v = value.getBytes("UTF-8");
} catch (java.io.UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
byte[] v1 = new byte[v.length+1];
System.arraycopy(v, 0, v1, 0, v.length);
v1[v.length] = '\0';
return v1;
}
private Class defineClassImpl(byte[] code, boolean mustBeBootstrap) {
ClassLoader loader = null;
if (! mustBeBootstrap) {
loader = new ClassLoader(null) {};
}
Class cl = unsafe.defineClass(className, code, 0, code.length, loader, null);
unsafe.ensureClassInitialized(cl);
return cl;
}
private void init(Class cl) {
if (this.clazz != null) {
return;
}
this.clazz = cl;
List timersList = new ArrayList();
this.eventHandlers = new HashMap();
this.lowMemHandlers = new HashMap();
Method[] methods = clazz.getMethods();
for (Method m : methods) {
int modifiers = m.getModifiers();
if (! Modifier.isStatic(modifiers)) {
continue;
}
OnEvent oev = m.getAnnotation(OnEvent.class);
if (oev != null && m.getParameterTypes().length == 0) {
eventHandlers.put(oev.value(), m);
}
OnError oer = m.getAnnotation(OnError.class);
if (oer != null) {
Class[] argTypes = m.getParameterTypes();
if (argTypes.length == 1 && argTypes[0] == Throwable.class) {
this.exceptionHandler = m;
}
}
OnExit oex = m.getAnnotation(OnExit.class);
if (oex != null) {
Class[] argTypes = m.getParameterTypes();
if (argTypes.length == 1 && argTypes[0] == int.class) {
this.exitHandler = m;
}
}
OnTimer ot = m.getAnnotation(OnTimer.class);
if (ot != null && m.getParameterTypes().length == 0) {
timersList.add(m);
}
OnLowMemory olm = m.getAnnotation(OnLowMemory.class);
if (olm != null) {
Class[] argTypes = m.getParameterTypes();
if ((argTypes.length == 0) ||
(argTypes.length == 1 && argTypes[0] == MemoryUsage.class)) {
lowMemHandlers.put(olm.pool(), m);
}
}
}
initMemoryPoolList();
for (MemoryPoolMXBean mpoolBean : memPoolList) {
String name = mpoolBean.getName();
if (lowMemHandlers.containsKey(name)) {
Method m = lowMemHandlers.get(name);
OnLowMemory olm = m.getAnnotation(OnLowMemory.class);
if (mpoolBean.isUsageThresholdSupported()) {
mpoolBean.setUsageThreshold(olm.threshold());
}
}
}
timerHandlers = new Method[timersList.size()];
timersList.toArray(timerHandlers);
BTraceMBean.registerMBean(clazz);
}
private static String resolveFileName(String name) {
if (name.indexOf(File.separatorChar) != -1) {
throw new IllegalArgumentException("directories are not allowed");
}
StringBuilder buf = new StringBuilder();
buf.append('.');
buf.append(File.separatorChar);
BTraceRuntime runtime = getCurrent();
buf.append("btrace");
if (runtime.args != null && runtime.args.length > 0) {
buf.append(runtime.args[0]);
}
buf.append(File.separatorChar);
buf.append(runtime.className);
new File(buf.toString()).mkdirs();
buf.append(File.separatorChar);
buf.append(name);
return buf.toString();
}
private static void loadLibrary(final ClassLoader cl) {
AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
loadBTraceLibrary(cl);
return null;
}
});
}
private static void loadBTraceLibrary(final ClassLoader loader) {
boolean isSolaris = System.getProperty("os.name").equals("SunOS");
if (isSolaris) {
try {
System.loadLibrary("btrace");
dtraceEnabled = true;
} catch (LinkageError le) {
if (loader == null ||
loader.getResource("com/sun/btrace") == null) {
System.err.println("cannot load libbtrace.so, will miss DTrace probes from BTrace");
return;
}
String path = loader.getResource("com/sun/btrace").toString();
path = path.substring(0, path.indexOf("!"));
path = path.substring("jar:".length(), path.lastIndexOf('/'));
String cpu = System.getProperty("os.arch");
if (cpu.equals("x86")) {
cpu = "i386";
}
path += "/" + cpu + "/libbtrace.so";
try {
path = new File(new URI(path)).getAbsolutePath();
} catch (RuntimeException re) {
throw re;
} catch (Exception e) {
throw new RuntimeException(e);
}
try {
System.load(path);
dtraceEnabled = true;
} catch (LinkageError le1) {
System.err.println("cannot load libbtrace.so, will miss DTrace probes from BTrace");
}
}
}
}
}
