static boolean atBugLevel(String bl) { // package-private
if (bugLevel == null) {
if (!sun.misc.VM.isBooted()) return false;
String value = AccessController.doPrivileged(new GetPropertyAction("sun.nio.ch.bugLevel"));
bugLevel = (value != null) ? value : "";
}
return bugLevel.equals(bl);
}
/**
* Invoke at VM initialization time to disable the critical error message box.
*
* <p>The critial error message box is disabled unless the system property
* <tt>sun.io.allowCriticalErrorMessageBox</tt> is set to something other than <code>false</code>.
* This includes the empty string.
*
* <p>This method does nothing if invoked after VM and class library initialization has completed.
*/
public static void initialize() {
if (!sun.misc.VM.isBooted()) {
String s = (String) System.getProperty("sun.io.allowCriticalErrorMessageBox");
if (s == null || s.equals(Boolean.FALSE.toString())) {
long mode = setErrorMode(0);
mode |= SEM_FAILCRITICALERRORS;
setErrorMode(mode);
}
}
}
/* */ private Reference<? extends T> reallyPoll() {
/* 75 */ if (this.head != null) {
/* 76 */ Reference localReference = this.head;
/* 77 */ this.head = (localReference.next == localReference ? null : localReference.next);
/* 78 */ localReference.queue = NULL;
/* 79 */ localReference.next = localReference;
/* 80 */ this.queueLength -= 1L;
/* 81 */ if ((localReference instanceof FinalReference)) {
/* 82 */ VM.addFinalRefCount(-1);
/* */ }
/* 84 */ return localReference;
/* */ }
/* 86 */ return null;
/* */ }
/* */ boolean enqueue(Reference<? extends T> paramReference) {
/* 58 */ synchronized (paramReference) {
/* 59 */ if (paramReference.queue == ENQUEUED) return false;
/* 60 */ synchronized (this.lock) {
/* 61 */ paramReference.queue = ENQUEUED;
/* 62 */ paramReference.next = (this.head == null ? paramReference : this.head);
/* 63 */ this.head = paramReference;
/* 64 */ this.queueLength += 1L;
/* 65 */ if ((paramReference instanceof FinalReference)) {
/* 66 */ VM.addFinalRefCount(1);
/* */ }
/* 68 */ this.lock.notifyAll();
/* 69 */ return true;
/* */ }
/* */ }
/* */ }
/**
* Rehashes the contents of this map into a new array with a larger capacity. This method is
* called automatically when the number of keys in this map reaches its threshold.
*
* <p>If current capacity is MAXIMUM_CAPACITY, this method does not resize the map, but sets
* threshold to Integer.MAX_VALUE. This has the effect of preventing future calls.
*
* @param newCapacity the new capacity, MUST be a power of two; must be greater than current
* capacity unless current capacity is MAXIMUM_CAPACITY (in which case value is irrelevant).
*/
void resize(int newCapacity) {
Entry[] oldTable = table;
int oldCapacity = oldTable.length;
if (oldCapacity == MAXIMUM_CAPACITY) {
threshold = Integer.MAX_VALUE;
return;
}
Entry[] newTable = new Entry[newCapacity];
boolean oldAltHashing = useAltHashing;
useAltHashing |=
sun.misc.VM.isBooted() && (newCapacity >= Holder.ALTERNATIVE_HASHING_THRESHOLD);
boolean rehash = oldAltHashing ^ useAltHashing;
transfer(newTable, rehash);
table = newTable;
threshold = (int) Math.min(newCapacity * loadFactor, MAXIMUM_CAPACITY + 1);
}
/**
* Constructs an empty <tt>HashMap</tt> with the specified initial capacity and load factor.
*
* @param initialCapacity the initial capacity
* @param loadFactor the load factor
* @throws IllegalArgumentException if the initial capacity is negative or the load factor is
* nonpositive
*/
public HashMap(int initialCapacity, float loadFactor) {
if (initialCapacity < 0)
throw new IllegalArgumentException("Illegal initial capacity: " + initialCapacity);
if (initialCapacity > MAXIMUM_CAPACITY) initialCapacity = MAXIMUM_CAPACITY;
if (loadFactor <= 0 || Float.isNaN(loadFactor))
throw new IllegalArgumentException("Illegal load factor: " + loadFactor);
// Find a power of 2 >= initialCapacity
int capacity = 1;
while (capacity < initialCapacity) capacity <<= 1;
this.loadFactor = loadFactor;
threshold = (int) Math.min(capacity * loadFactor, MAXIMUM_CAPACITY + 1);
table = new Entry[capacity];
useAltHashing = sun.misc.VM.isBooted() && (capacity >= Holder.ALTERNATIVE_HASHING_THRESHOLD);
init();
}
/** Reconstitute the {@code HashMap} instance from a stream (i.e., deserialize it). */
private void readObject(java.io.ObjectInputStream s) throws IOException, ClassNotFoundException {
// Read in the threshold (ignored), loadfactor, and any hidden stuff
s.defaultReadObject();
if (loadFactor <= 0 || Float.isNaN(loadFactor))
throw new InvalidObjectException("Illegal load factor: " + loadFactor);
// set hashSeed (can only happen after VM boot)
Holder.UNSAFE.putIntVolatile(
this, Holder.HASHSEED_OFFSET, sun.misc.Hashing.randomHashSeed(this));
// Read in number of buckets and allocate the bucket array;
s.readInt(); // ignored
// Read number of mappings
int mappings = s.readInt();
if (mappings < 0) throw new InvalidObjectException("Illegal mappings count: " + mappings);
int initialCapacity =
(int)
Math.min(
// capacity chosen by number of mappings
// and desired load (if >= 0.25)
mappings * Math.min(1 / loadFactor, 4.0f),
// we have limits...
HashMap.MAXIMUM_CAPACITY);
int capacity = 1;
// find smallest power of two which holds all mappings
while (capacity < initialCapacity) {
capacity <<= 1;
}
table = new Entry[capacity];
threshold = (int) Math.min(capacity * loadFactor, MAXIMUM_CAPACITY + 1);
useAltHashing = sun.misc.VM.isBooted() && (capacity >= Holder.ALTERNATIVE_HASHING_THRESHOLD);
init(); // Give subclass a chance to do its thing.
// Read the keys and values, and put the mappings in the HashMap
for (int i = 0; i < mappings; i++) {
K key = (K) s.readObject();
V value = (V) s.readObject();
putForCreate(key, value);
}
}
/** Initialize the system class. Called after thread initialization. */
private static void initializeSystemClass() {
// VM might invoke JNU_NewStringPlatform() to set those encoding
// sensitive properties (user.home, user.name, boot.class.path, etc.)
// during "props" initialization, in which it may need access, via
// System.getProperty(), to the related system encoding property that
// have been initialized (put into "props") at early stage of the
// initialization. So make sure the "props" is available at the
// very beginning of the initialization and all system properties to
// be put into it directly.
props = new Properties();
initProperties(props); // initialized by the VM
// There are certain system configurations that may be controlled by
// VM options such as the maximum amount of direct memory and
// Integer cache size used to support the object identity semantics
// of autoboxing. Typically, the library will obtain these values
// from the properties set by the VM. If the properties are for
// internal implementation use only, these properties should be
// removed from the system properties.
//
// See java.lang.Integer.IntegerCache and the
// sun.misc.VM.saveAndRemoveProperties method for example.
//
// Save a private copy of the system properties object that
// can only be accessed by the internal implementation. Remove
// certain system properties that are not intended for public access.
sun.misc.VM.saveAndRemoveProperties(props);
lineSeparator = props.getProperty("line.separator");
sun.misc.Version.init();
FileInputStream fdIn = new FileInputStream(FileDescriptor.in);
FileOutputStream fdOut = new FileOutputStream(FileDescriptor.out);
FileOutputStream fdErr = new FileOutputStream(FileDescriptor.err);
setIn0(new BufferedInputStream(fdIn));
setOut0(new PrintStream(new BufferedOutputStream(fdOut, 128), true));
setErr0(new PrintStream(new BufferedOutputStream(fdErr, 128), true));
// Load the zip library now in order to keep java.util.zip.ZipFile
// from trying to use itself to load this library later.
loadLibrary("zip");
// Setup Java signal handlers for HUP, TERM, and INT (where available).
Terminator.setup();
// Initialize any miscellenous operating system settings that need to be
// set for the class libraries. Currently this is no-op everywhere except
// for Windows where the process-wide error mode is set before the java.io
// classes are used.
sun.misc.VM.initializeOSEnvironment();
// The main thread is not added to its thread group in the same
// way as other threads; we must do it ourselves here.
Thread current = Thread.currentThread();
current.getThreadGroup().add(current);
// register shared secrets
setJavaLangAccess();
// Subsystems that are invoked during initialization can invoke
// sun.misc.VM.isBooted() in order to avoid doing things that should
// wait until the application class loader has been set up.
// IMPORTANT: Ensure that this remains the last initialization action!
sun.misc.VM.booted();
}
private synchronized String getStackTrace() {
if (stackTrace == null) {
boolean gotoSourceAvailable =
heapFragmentWalker.getHeapDumpProject() != null && GoToSource.isAvailable();
StringBuilder sb = new StringBuilder();
Heap h = heapFragmentWalker.getHeapFragment();
Collection<GCRoot> roots = h.getGCRoots();
Map<ThreadObjectGCRoot, Map<Integer, List<JavaFrameGCRoot>>> javaFrameMap =
computeJavaFrameMap(roots);
// Use this to enable VisualVM color scheme for threads dumps:
// sw.append("<pre style='color: #cc3300;'>"); // NOI18N
sb.append("<pre>"); // NOI18N
for (GCRoot root : roots) {
if (root.getKind().equals(GCRoot.THREAD_OBJECT)) {
ThreadObjectGCRoot threadRoot = (ThreadObjectGCRoot) root;
Instance threadInstance = threadRoot.getInstance();
if (threadInstance != null) {
String threadName = getThreadName(threadInstance);
Boolean daemon = (Boolean) threadInstance.getValueOfField("daemon"); // NOI18N
Integer priority = (Integer) threadInstance.getValueOfField("priority"); // NOI18N
Long threadId = (Long) threadInstance.getValueOfField("tid"); // NOI18N
Integer threadStatus =
(Integer) threadInstance.getValueOfField("threadStatus"); // NOI18N
StackTraceElement stack[] = threadRoot.getStackTrace();
Map<Integer, List<JavaFrameGCRoot>> localsMap = javaFrameMap.get(threadRoot);
String style = "";
if (threadRoot.equals(oome)) {
style = "style=\"color: #FF0000\"";
}
// --- Use this to enable VisualVM color scheme for threads dumps: ---
// sw.append(" <span style=\"color: #0033CC\">"); // NOI18N
sb.append(" <a name=")
.append(threadInstance.getInstanceId())
.append("></a><b ")
.append(style)
.append(">"); // NOI18N
// -------------------------------------------------------------------
sb.append("\"")
.append(htmlize(threadName))
.append("\"")
.append(daemon.booleanValue() ? " daemon" : "")
.append(" prio=")
.append(priority); // NOI18N
if (threadId != null) {
sb.append(" tid=").append(threadId); // NOI18N
}
if (threadStatus != null) {
State tState = sun.misc.VM.toThreadState(threadStatus.intValue());
sb.append(" ").append(tState); // NOI18N
}
// --- Use this to enable VisualVM color scheme for threads dumps: ---
// sw.append("</span><br>"); // NOI18N
sb.append("</b><br>"); // NOI18N
// -------------------------------------------------------------------
if (stack != null) {
for (int i = 0; i < stack.length; i++) {
String stackElHref;
StackTraceElement stackElement = stack[i];
String stackElementText = htmlize(stackElement.toString());
if (gotoSourceAvailable) {
String className = stackElement.getClassName();
String method = stackElement.getMethodName();
int lineNo = stackElement.getLineNumber();
String stackUrl =
OPEN_THREADS_URL + className + "|" + method + "|" + lineNo; // NOI18N
// --- Use this to enable VisualVM color scheme for threads dumps: ---
// stackElHref = " <a style=\"color: #CC3300;\"
// href=\""+stackUrl+"\">"+stackElement+"</a>"; // NOI18N
stackElHref =
"<a href=\"" + stackUrl + "\">" + stackElementText + "</a>"; // NOI18N
// -------------------------------------------------------------------
} else {
stackElHref = stackElementText;
}
sb.append("\tat ").append(stackElHref).append("<br>"); // NOI18N
if (localsMap != null) {
List<JavaFrameGCRoot> locals = localsMap.get(Integer.valueOf(i));
if (locals != null) {
for (JavaFrameGCRoot localVar : locals) {
Instance localInstance = localVar.getInstance();
if (localInstance != null) {
sb.append("\t Local Variable: ")
.append(printInstance(localInstance))
.append("<br>"); // NOI18N
} else {
sb.append(
"\t Unknown Local Variable<br>"); // NOI18N
}
}
}
}
}
}
} else {
sb.append(" Unknown thread"); // NOI18N
}
sb.append("<br>"); // NOI18N
}
}
sb.append("</pre>"); // NOI18N
stackTrace = sb.toString();
}
return stackTrace;
}