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java.lang

pack-priv final Class StackStreamFactory

extends Object
Class Inheritance
Imports
jdk.internal.reflect.MethodAccessor, .ConstructorAccessor, java.lang.StackWalker.Option, .StackWalker.StackFrame, java.lang.annotation.Native, java.lang.reflect.Array, .Method, .Constructor, java.util.Arrays, .HashSet, .NoSuchElementException, .Objects, .Set, .Spliterator, java.util.function.Consumer, .Function, java.util.stream.Stream, .StreamSupport, jdk.internal.vm.Continuation, .ContinuationScope
StackStreamFactory class provides static factory methods to get different kinds of stack walker/traverser. AbstractStackWalker provides the basic stack walking support fetching stack frames from VM in batches. AbstractStackWalker subclass is specialized for a specific kind of stack traversal to avoid overhead of Stream/Lambda 1. Support traversing Stream 2. StackWalker::getCallerClass 3. AccessControlContext getting ProtectionDomain

Nested and Inner Type Summary

Modifier and TypeClass and Description
pack-priv abstract static class
StackStreamFactory.AbstractStackWalker<
the type of the result returned from stack walking
R,
the type of the data gathered for each frame. For example, StackFrameInfo for StackWalker::walk or Class for StackWalker::getCallerClass
T>

Subclass of AbstractStackWalker implements a specific stack walking logic.

pack-priv static class
StackStreamFactory.CallerClassFinder

pack-priv static class
StackStreamFactory.ClassFrameBuffer

pack-priv abstract static class
StackStreamFactory.FrameBuffer<F>

pack-priv static class
StackStreamFactory.LiveStackInfoTraverser<T>

pack-priv static class
StackStreamFactory.StackFrameBuffer<T extends ClassFrameInfo>

pack-priv static class
StackStreamFactory.StackFrameTraverser<T>

pack-priv static enum
StackStreamFactory.WalkerState

Field Summary

Modifier and TypeField and Description
private static final int
BATCH_SIZE

private static final int
CLASS_INFO_ONLY

private static final int
DEFAULT_MODE

private static final int
FILL_LIVE_STACK_FRAMES

pack-priv static final boolean
isDebug

private static final int
LARGE_BATCH_SIZE

private static final int
MIN_BATCH_SIZE

private static final int
RESERVED_ELEMENTS

private static final int
SHOW_HIDDEN_FRAMES

private static final int
SMALL_BATCH

private static final Set<Class<?>>
stackWalkImplClasses

Constructor Summary

AccessConstructor and Description
private
StackStreamFactory()

Method Summary

Modifier and TypeMethod and Description
private static native boolean
checkStackWalkModes()

private static boolean
filterStackWalkImpl(Class<?> c)

private static Set<Class<?>>
init()

private static boolean
isMethodHandleFrame(Class<?> c)

private static boolean
isReflectionFrame(Class<?> c)

pack-priv static StackStreamFactory.CallerClassFinder
makeCallerFinder(StackWalker walker)

Gets a stack stream to find caller class.

pack-priv static <T> StackStreamFactory.StackFrameTraverser<T>
makeStackTraverser(StackWalker walker, Function<? super Stream<StackWalker.StackFrame>, ? extends T> function)

private static int
toStackWalkMode(StackWalker walker, int mode)

Inherited from java.lang.Object:
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