com.oracle.svm.core.monitor

Class MonitorSnippets

java.lang.Object

org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates

com.oracle.svm.core.graal.snippets.SubstrateTemplates

com.oracle.svm.core.monitor.MonitorSnippets

All Implemented Interfaces:

org.graalvm.compiler.api.replacements.SnippetTemplateCache, org.graalvm.compiler.replacements.Snippets

public class MonitorSnippets
extends SubstrateTemplates
implements org.graalvm.compiler.replacements.Snippets

Snippets for lowering of monitor nodes (the nodes representing the Java "synchronized" keyword). There is currently no fast path, because the ReentrantLock used for monitor operations cannot be inlined in a snippet without changes or code duplication. For AOT compiled code, the null check for the object is already inserted by the bytecode parser, i.e., the object is already guaranteed to be non-null. For JIT compiled code though the null check needs to be inserted during lowering. To enable further high-level optimizations, the null check is inserted during high-tier lowerings, while the snippets are only lowered during the lower tier lowering.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	MonitorSnippets.MonitorLowering

Field Summary

Fields

Modifier and Type	Field and Description
protected static SnippetRuntime.SubstrateForeignCallDescriptor[]	FOREIGN_CALLS
protected static SnippetRuntime.SubstrateForeignCallDescriptor	SLOW_PATH_MONITOR_ENTER
protected static SnippetRuntime.SubstrateForeignCallDescriptor	SLOW_PATH_MONITOR_EXIT

Fields inherited from class org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates

factories, metaAccess, options, providers, snippetReflection, target

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MonitorSnippets(org.graalvm.compiler.options.OptionValues options, Iterable<org.graalvm.compiler.debug.DebugHandlersFactory> factories, org.graalvm.compiler.phases.util.Providers providers, org.graalvm.compiler.api.replacements.SnippetReflectionProvider snippetReflection)

Method Summary

Modifier and Type	Method and Description
protected static void	callSlowPath(org.graalvm.compiler.core.common.spi.ForeignCallDescriptor descriptor, Object obj)
protected static void	monitorEnterSnippet(Object obj)
protected static void	monitorExitSnippet(Object obj)
protected void	registerLowerings(Map<Class<? extends org.graalvm.compiler.graph.Node>,NodeLoweringProvider<?>> lowerings)

Methods inherited from class com.oracle.svm.core.graal.snippets.SubstrateTemplates

snippet, snippet, snippet, snippet

Methods inherited from class org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates

createMidTierPhases, findMethod, findMethod, getMetaAccess, snippet, template

Methods inherited from class java.lang.Object

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

Field Detail

SLOW_PATH_MONITOR_ENTER

protected static final SnippetRuntime.SubstrateForeignCallDescriptor SLOW_PATH_MONITOR_ENTER

SLOW_PATH_MONITOR_EXIT

protected static final SnippetRuntime.SubstrateForeignCallDescriptor SLOW_PATH_MONITOR_EXIT

FOREIGN_CALLS

protected static final SnippetRuntime.SubstrateForeignCallDescriptor[] FOREIGN_CALLS

Constructor Detail

MonitorSnippets

protected MonitorSnippets(org.graalvm.compiler.options.OptionValues options,
                          Iterable<org.graalvm.compiler.debug.DebugHandlersFactory> factories,
                          org.graalvm.compiler.phases.util.Providers providers,
                          org.graalvm.compiler.api.replacements.SnippetReflectionProvider snippetReflection)

Method Detail

monitorEnterSnippet

protected static void monitorEnterSnippet(Object obj)

monitorExitSnippet

protected static void monitorExitSnippet(Object obj)

callSlowPath

protected static void callSlowPath(org.graalvm.compiler.core.common.spi.ForeignCallDescriptor descriptor,
                                   Object obj)

registerLowerings

protected void registerLowerings(Map<Class<? extends org.graalvm.compiler.graph.Node>,NodeLoweringProvider<?>> lowerings)