org.graalvm.compiler.hotspot.meta

Class HotSpotExceptionDispatchPlugin

java.lang.Object

org.graalvm.compiler.hotspot.meta.HotSpotExceptionDispatchPlugin

All Implemented Interfaces:

GraphBuilderPlugin, NodePlugin

public final class HotSpotExceptionDispatchPlugin
extends Object
implements NodePlugin

This plugin does HotSpot-specific instrumentation of exception dispatch to check the JavaThread.should_post_on_exceptions flag to see exceptions must be reported for the current thread.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HotSpotExceptionDispatchPlugin.Options

Constructor Summary

Constructors

Constructor and Description
HotSpotExceptionDispatchPlugin(GraalHotSpotVMConfig config, JavaKind wordKind)

Method Summary

Modifier and Type	Method and Description
FixedWithNextNode	instrumentExceptionDispatch(StructuredGraph graph, FixedWithNextNode afterExceptionLoaded, Supplier<FrameState> frameStateFunction) Allows this plugin to add nodes after the exception object has been loaded in the dispatch sequence.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin

canChangeStackKind, convertInvokeDynamic, handleCheckCast, handleInstanceOf, handleInvoke, handleLoadField, handleLoadIndexed, handleLoadStaticField, handleNewArray, handleNewInstance, handleNewMultiArray, handleStoreField, handleStoreIndexed, handleStoreStaticField

Constructor Detail

HotSpotExceptionDispatchPlugin

public HotSpotExceptionDispatchPlugin(GraalHotSpotVMConfig config,
                                      JavaKind wordKind)

Method Detail

instrumentExceptionDispatch

public FixedWithNextNode instrumentExceptionDispatch(StructuredGraph graph,
                                                     FixedWithNextNode afterExceptionLoaded,
                                                     Supplier<FrameState> frameStateFunction)

Description copied from interface: NodePlugin

Allows this plugin to add nodes after the exception object has been loaded in the dispatch sequence. Note that a StructuredGraph is provided to this call instead of a GraphBuilderContext so that the caller has a guarantee that its current control flow insertion point is not changed by this call. This means nodes must be added to the graph with the appropriate method (e.g., Graph.unique(T) for Node.ValueNumberable nodes) and fixed nodes must be manually added as successors of afterExceptionLoaded. The reason for this constraint is that when this plugin runs, it's inserting instructions into a different block than the one currently being parsed.

Specified by:

instrumentExceptionDispatch in interface NodePlugin

Parameters:

graph - the graph being parsed

afterExceptionLoaded - the last fixed node after loading the exception

frameStateFunction - a helper that produces a FrameState suitable for deopt

Returns:

the last fixed node after instrumentation