下面列出了java.util.logging.LoggingPermission#sun.misc.SharedSecrets 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
static void runAllFinalizers() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f;
synchronized (lock) {
f = unfinalized;
if (f == null) break;
unfinalized = f.next;
}
f.runFinalizer(jla);
}}});
}
static void runFinalization() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f = (Finalizer)queue.poll();
if (f == null) break;
f.runFinalizer(jla);
}
}
});
}
static void runFinalization() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
// in case of recursive call to run()
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f = (Finalizer)queue.poll();
if (f == null) break;
f.runFinalizer(jla);
}
}
});
}
/**
* Reconstitutes the {@code PriorityQueue} instance from a stream
* (that is, deserializes it).
*
* @param s the stream
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
// Read in size, and any hidden stuff
s.defaultReadObject();
// Read in (and discard) array length
s.readInt();
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, size);
queue = new Object[size];
// Read in all elements.
for (int i = 0; i < size; i++)
queue[i] = s.readObject();
// Elements are guaranteed to be in "proper order", but the
// spec has never explained what that might be.
heapify();
}
static void runFinalization() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f = (Finalizer)queue.poll();
if (f == null) break;
f.runFinalizer(jla);
}
}
});
}
public static void main(String[]args) throws Exception {
final DomainCombiner dc = new DomainCombiner() {
@Override
public ProtectionDomain[] combine(ProtectionDomain[] currentDomains, ProtectionDomain[] assignedDomains) {
return currentDomains; // basically a no-op
}
};
// Get an instance of the saved ACC
AccessControlContext saved = AccessController.getContext();
// Simulate the stack ACC with a DomainCombiner attached
AccessControlContext stack = new AccessControlContext(AccessController.getContext(), dc);
// Now try to run JavaSecurityAccess.doIntersectionPrivilege() and assert
// whether the DomainCombiner from the stack ACC is preserved
boolean ret = SharedSecrets.getJavaSecurityAccess().doIntersectionPrivilege(new PrivilegedAction<Boolean>() {
@Override
public Boolean run() {
return dc == AccessController.getContext().getDomainCombiner();
}
}, stack, saved);
if (!ret) {
System.exit(1);
}
}
private static void forkSecondaryFinalizer(final Runnable proc) {
AccessController.doPrivileged(
new PrivilegedAction<Void>() {
public Void run() {
ThreadGroup tg = Thread.currentThread().getThreadGroup();
for (ThreadGroup tgn = tg;
tgn != null;
tg = tgn, tgn = tg.getParent());
Thread sft = new Thread(tg, proc, "Secondary finalizer");
if (TenantGlobals.isDataIsolationEnabled() && TenantContainer.current() != null) {
SharedSecrets.getTenantAccess()
.registerServiceThread(TenantContainer.current(), sft);
}
sft.start();
try {
sft.join();
} catch (InterruptedException x) {
Thread.currentThread().interrupt();
}
return null;
}});
}
static void runAllFinalizers() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f;
synchronized (lock) {
f = unfinalized;
if (f == null) break;
unfinalized = f.next;
}
f.runFinalizer(jla);
}}});
}
/**
* Reconstitutes the {@code PriorityQueue} instance from a stream
* (that is, deserializes it).
*
* @param s the stream
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
// Read in size, and any hidden stuff
s.defaultReadObject();
// Read in (and discard) array length
s.readInt();
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, size);
queue = new Object[size];
// Read in all elements.
for (int i = 0; i < size; i++)
queue[i] = s.readObject();
// Elements are guaranteed to be in "proper order", but the
// spec has never explained what that might be.
heapify();
}
static void runFinalization() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
// in case of recursive call to run()
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f = (Finalizer)queue.poll();
if (f == null) break;
f.runFinalizer(jla);
}
}
});
}
public static void main(String[]args) throws Exception {
final DomainCombiner dc = new DomainCombiner() {
@Override
public ProtectionDomain[] combine(ProtectionDomain[] currentDomains, ProtectionDomain[] assignedDomains) {
return currentDomains; // basically a no-op
}
};
// Get an instance of the saved ACC
AccessControlContext saved = AccessController.getContext();
// Simulate the stack ACC with a DomainCombiner attached
AccessControlContext stack = new AccessControlContext(AccessController.getContext(), dc);
// Now try to run JavaSecurityAccess.doIntersectionPrivilege() and assert
// whether the DomainCombiner from the stack ACC is preserved
boolean ret = SharedSecrets.getJavaSecurityAccess().doIntersectionPrivilege(new PrivilegedAction<Boolean>() {
@Override
public Boolean run() {
return dc == AccessController.getContext().getDomainCombiner();
}
}, stack, saved);
if (!ret) {
System.exit(1);
}
}
/**
* Reconstitutes the <tt>IdentityHashMap</tt> instance from a stream (i.e.,
* deserializes it).
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
// Read in any hidden stuff
s.defaultReadObject();
// Read in size (number of Mappings)
int size = s.readInt();
if (size < 0)
throw new java.io.StreamCorruptedException
("Illegal mappings count: " + size);
int cap = capacity(size);
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, cap);
init(cap);
// Read the keys and values, and put the mappings in the table
for (int i=0; i<size; i++) {
@SuppressWarnings("unchecked")
K key = (K) s.readObject();
@SuppressWarnings("unchecked")
V value = (V) s.readObject();
putForCreate(key, value);
}
}
PolicyInfo(int numCaches) {
policyEntries = new ArrayList<>();
identityPolicyEntries =
Collections.synchronizedList(new ArrayList<PolicyEntry>(2));
aliasMapping = Collections.synchronizedMap(new HashMap<>(11));
pdMapping = new ProtectionDomainCache[numCaches];
JavaSecurityProtectionDomainAccess jspda
= SharedSecrets.getJavaSecurityProtectionDomainAccess();
for (int i = 0; i < numCaches; i++) {
pdMapping[i] = jspda.getProtectionDomainCache();
}
if (numCaches > 1) {
random = new java.util.Random();
}
}
/**
* Reconstitutes this list from a stream (that is, deserializes it).
* @param s the stream
* @throws ClassNotFoundException if the class of a serialized object
* could not be found
* @throws java.io.IOException if an I/O error occurs
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject();
// bind to new lock
resetLock();
// Read in array length and allocate array
int len = s.readInt();
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, len);
Object[] elements = new Object[len];
// Read in all elements in the proper order.
for (int i = 0; i < len; i++)
elements[i] = s.readObject();
setArray(elements);
}
static void runFinalization() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f = (Finalizer)queue.poll();
if (f == null) break;
f.runFinalizer(jla);
}
}
});
}
static void runAllFinalizers() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
// in case of recursive call to run()
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f;
synchronized (lock) {
f = unfinalized;
if (f == null) break;
unfinalized = f.next;
}
f.runFinalizer(jla);
}}});
}
private static String getOriginalHostname(InetAddress inetAddress) {
/*
* Get the original hostname via sun.misc.SharedSecrets.
*/
JavaNetAccess jna = SharedSecrets.getJavaNetAccess();
String originalHostname = jna.getOriginalHostName(inetAddress);
/*
* If no application specified hostname, use the IP address.
*/
if (originalHostname == null || originalHostname.length() == 0) {
originalHostname = inetAddress.getHostAddress();
}
return originalHostname;
}
/**
* Reconstitutes the <tt>IdentityHashMap</tt> instance from a stream (i.e.,
* deserializes it).
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
// Read in any hidden stuff
s.defaultReadObject();
// Read in size (number of Mappings)
int size = s.readInt();
if (size < 0)
throw new java.io.StreamCorruptedException
("Illegal mappings count: " + size);
int cap = capacity(size);
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, cap);
init(cap);
// Read the keys and values, and put the mappings in the table
for (int i=0; i<size; i++) {
@SuppressWarnings("unchecked")
K key = (K) s.readObject();
@SuppressWarnings("unchecked")
V value = (V) s.readObject();
putForCreate(key, value);
}
}
/**
* Test SharedSecrets checkArray with an ObjectInputStream subclassed to
* handle all input stream functions.
*/
@Test(dataProvider = "Patterns")
public void subclassedOIS(String pattern, int arraySize, Object[] array) throws IOException {
byte[] bytes = SerialFilterTest.writeObjects(array);
try (ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new MyInputStream(bais)) {
// Check the arraysize against the filter
ObjectInputFilter filter = ObjectInputFilter.Config.createFilter(pattern);
ObjectInputFilter.Config.setObjectInputFilter(ois, filter);
SharedSecrets.getJavaOISAccess()
.checkArray(ois, array.getClass(), arraySize);
Assert.assertTrue(array.length >= arraySize,
"Should have thrown InvalidClassException due to array size");
} catch (InvalidClassException ice) {
Assert.assertFalse(array.length > arraySize,
"Should NOT have thrown InvalidClassException due to array size");
}
}
static void runFinalization() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
// in case of recursive call to run()
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f = (Finalizer)queue.poll();
if (f == null) break;
f.runFinalizer(jla);
}
}
});
}
static void runAllFinalizers() {
if (!VM.isBooted()) {
return;
}
forkSecondaryFinalizer(new Runnable() {
private volatile boolean running;
public void run() {
if (running)
return;
final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
running = true;
for (;;) {
Finalizer f;
synchronized (lock) {
f = unfinalized;
if (f == null) break;
unfinalized = f.next;
}
f.runFinalizer(jla);
}}});
}
/**
* Reconstitutes this deque from a stream (that is, deserializes it).
*/
private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject();
// Read in size and allocate array
int size = s.readInt();
int capacity = calculateSize(size);
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, capacity);
allocateElements(size);
head = 0;
tail = size;
// Read in all elements in the proper order.
for (int i = 0; i < size; i++) {
elements[i] = s.readObject();
}
}
/**
* 从流中重构ArrayList实例（即反序列化）。
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
elementData = EMPTY_ELEMENTDATA;
// 执行默认的序列化/反序列化过程
s.defaultReadObject();
// 读入数组长度
s.readInt(); // ignored
if (size > 0) {
// 像clone()方法 ，但根据大小而不是容量分配数组
int capacity = calculateCapacity(elementData, size);
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, capacity);
ensureCapacityInternal(size);
Object[] a = elementData;
//读入所有元素
for (int i = 0; i < size; i++) {
a[i] = s.readObject();
}
}
}
/**
* Reconstitutes this list from a stream (that is, deserializes it).
* @param s the stream
* @throws ClassNotFoundException if the class of a serialized object
* could not be found
* @throws java.io.IOException if an I/O error occurs
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject();
// bind to new lock
resetLock();
// Read in array length and allocate array
int len = s.readInt();
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, len);
Object[] elements = new Object[len];
// Read in all elements in the proper order.
for (int i = 0; i < len; i++)
elements[i] = s.readObject();
setArray(elements);
}
/**
* Reconstitute the <tt>ArrayList</tt> instance from a stream (that is,
* deserialize it).
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
elementData = EMPTY_ELEMENTDATA;
// Read in size, and any hidden stuff
s.defaultReadObject();
// Read in capacity
s.readInt(); // ignored
if (size > 0) {
// be like clone(), allocate array based upon size not capacity
int capacity = calculateCapacity(elementData, size);
SharedSecrets.getJavaOISAccess().checkArray(s, Object[].class, capacity);
ensureCapacityInternal(size);
Object[] a = elementData;
// Read in all elements in the proper order.
for (int i=0; i<size; i++) {
a[i] = s.readObject();
}
}
}
FileDescriptor duplicateForMapping(FileDescriptor fd) throws IOException {
// on Windows we need to keep a handle to the file
JavaIOFileDescriptorAccess fdAccess =
SharedSecrets.getJavaIOFileDescriptorAccess();
FileDescriptor result = new FileDescriptor();
long handle = duplicateHandle(fdAccess.getHandle(fd));
fdAccess.setHandle(result, handle);
return result;
}
private LoggerContext getUserContext() {
LoggerContext context = null;
SecurityManager sm = System.getSecurityManager();
JavaAWTAccess javaAwtAccess = SharedSecrets.getJavaAWTAccess();
if (sm != null && javaAwtAccess != null) {
// for each applet, it has its own LoggerContext isolated from others
final Object ecx = javaAwtAccess.getAppletContext();
if (ecx != null) {
synchronized (javaAwtAccess) {
// find the AppContext of the applet code
// will be null if we are in the main app context.
if (contextsMap == null) {
contextsMap = new WeakHashMap<>();
}
context = contextsMap.get(ecx);
if (context == null) {
// Create a new LoggerContext for the applet.
context = new LoggerContext();
contextsMap.put(ecx, context);
}
}
}
}
// for standalone app, return userContext
return context != null ? context : userContext;
}
private void inferCaller() {
needToInferCaller = false;
JavaLangAccess access = SharedSecrets.getJavaLangAccess();
Throwable throwable = new Throwable();
int depth = access.getStackTraceDepth(throwable);
boolean lookingForLogger = true;
for (int ix = 0; ix < depth; ix++) {
// Calling getStackTraceElement directly prevents the VM
// from paying the cost of building the entire stack frame.
StackTraceElement frame =
access.getStackTraceElement(throwable, ix);
String cname = frame.getClassName();
boolean isLoggerImpl = isLoggerImplFrame(cname);
if (lookingForLogger) {
// Skip all frames until we have found the first logger frame.
if (isLoggerImpl) {
lookingForLogger = false;
}
} else {
if (!isLoggerImpl) {
// skip reflection call
if (!cname.startsWith("java.lang.reflect.") && !cname.startsWith("sun.reflect.")) {
// We've found the relevant frame.
setSourceClassName(cname);
setSourceMethodName(frame.getMethodName());
return;
}
}
}
}
// We haven't found a suitable frame, so just punt. This is
// OK as we are only committed to making a "best effort" here.
}
private void inferCaller() {
needToInferCaller = false;
JavaLangAccess access = SharedSecrets.getJavaLangAccess();
Throwable throwable = new Throwable();
int depth = access.getStackTraceDepth(throwable);
boolean lookingForLogger = true;
for (int ix = 0; ix < depth; ix++) {
// Calling getStackTraceElement directly prevents the VM
// from paying the cost of building the entire stack frame.
StackTraceElement frame =
access.getStackTraceElement(throwable, ix);
String cname = frame.getClassName();
boolean isLoggerImpl = isLoggerImplFrame(cname);
if (lookingForLogger) {
// Skip all frames until we have found the first logger frame.
if (isLoggerImpl) {
lookingForLogger = false;
}
} else {
if (!isLoggerImpl) {
// skip reflection call
if (!cname.startsWith("java.lang.reflect.") && !cname.startsWith("sun.reflect.")) {
// We've found the relevant frame.
setSourceClassName(cname);
setSourceMethodName(frame.getMethodName());
return;
}
}
}
}
// We haven't found a suitable frame, so just punt. This is
// OK as we are only committed to making a "best effort" here.
}
Thread createThread(final Runnable r) {
final AccessControlContext acc = AccessController.getContext();
// 4290486: doPrivileged is needed to create a thread in
// an environment that restricts "modifyThreadGroup".
return AccessController.doPrivileged(
new PrivilegedAction<Thread>() {
public Thread run() {
return SharedSecrets.getJavaLangAccess()
.newThreadWithAcc(r, acc);
}
}
);
}