changeset 183:2bfddc119eea

6690122: Provide a mechanism for specifying Java-level USDT-like dtrace probes Summary: Initial checkin of JSDT code Reviewed-by: sspitsyn, sbohne
author kamg
date Thu, 17 Apr 2008 22:00:16 -0400
parents 74a42d77106b
children 79b594e72df0
files make/com/sun/Makefile make/com/sun/tracing/Makefile make/com/sun/tracing/dtrace/Makefile make/docs/Makefile make/docs/NON_CORE_PKGS.gmk make/sun/Makefile make/sun/tracing/Makefile make/sun/tracing/dtrace/Makefile make/sun/tracing/dtrace/mapfile-vers src/share/classes/com/sun/tracing/Probe.java src/share/classes/com/sun/tracing/ProbeName.java src/share/classes/com/sun/tracing/Provider.java src/share/classes/com/sun/tracing/ProviderFactory.java src/share/classes/com/sun/tracing/ProviderName.java src/share/classes/com/sun/tracing/dtrace/ArgsAttributes.java src/share/classes/com/sun/tracing/dtrace/Attributes.java src/share/classes/com/sun/tracing/dtrace/DependencyClass.java src/share/classes/com/sun/tracing/dtrace/FunctionAttributes.java src/share/classes/com/sun/tracing/dtrace/FunctionName.java src/share/classes/com/sun/tracing/dtrace/ModuleAttributes.java src/share/classes/com/sun/tracing/dtrace/ModuleName.java src/share/classes/com/sun/tracing/dtrace/NameAttributes.java src/share/classes/com/sun/tracing/dtrace/ProviderAttributes.java src/share/classes/com/sun/tracing/dtrace/StabilityLevel.java src/share/classes/com/sun/tracing/dtrace/package-info.java src/share/classes/com/sun/tracing/package-info.java src/share/classes/sun/tracing/MultiplexProviderFactory.java src/share/classes/sun/tracing/NullProviderFactory.java src/share/classes/sun/tracing/PrintStreamProviderFactory.java src/share/classes/sun/tracing/ProbeSkeleton.java src/share/classes/sun/tracing/ProviderSkeleton.java src/share/classes/sun/tracing/dtrace/Activation.java src/share/classes/sun/tracing/dtrace/DTraceProbe.java src/share/classes/sun/tracing/dtrace/DTraceProvider.java src/share/classes/sun/tracing/dtrace/DTraceProviderFactory.java src/share/classes/sun/tracing/dtrace/JVM.java src/share/classes/sun/tracing/package-info.java src/share/javavm/export/jvm.h src/share/native/sun/tracing/dtrace/JVM.c src/share/native/sun/tracing/dtrace/jvm_symbols.h src/solaris/native/sun/tracing/dtrace/jvm_symbols_md.c src/windows/native/sun/tracing/dtrace/jvm_symbols_md.c test/com/sun/tracing/BasicFunctionality.java
diffstat 43 files changed, 2885 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/make/com/sun/Makefile	Tue Apr 15 17:46:47 2008 -0700
+++ b/make/com/sun/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -41,7 +41,7 @@
 # Omit mirror since it's built with the apt tool.
 SUBDIRS = $(SCRIPT_SUBDIR) image security crypto/provider jndi jmx \
     java inputmethods org xml rowset net/httpserver net/ssl demo \
-    tools jarsigner
+    tools jarsigner tracing
 
 all build clean clobber::
 	$(SUBDIRS-loop)
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/com/sun/tracing/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,26 @@
+#
+# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+# SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+#
+
+#
+# Makefile for building tracing classes
+#
+
+BUILDDIR = ../../..
+PACKAGE = com.sun.tracing
+PRODUCT = sun
+include $(BUILDDIR)/common/Defs.gmk
+
+SUBDIRS = dtrace 
+all build:
+	$(SUBDIRS-loop)
+clean clobber::
+	$(SUBDIRS-loop)
+
+AUTO_FILES_JAVA_DIRS = com/sun/tracing
+
+#
+# Rules.
+#
+include $(BUILDDIR)/common/Classes.gmk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/com/sun/tracing/dtrace/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,19 @@
+#
+# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+# SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+#
+
+#
+# Makefile for building dtrace extension
+#
+BUILDDIR = ../../../..
+PACKAGE = com.sun.tracing.dtrace
+PRODUCT = sun
+include $(BUILDDIR)/common/Defs.gmk
+
+AUTO_FILES_JAVA_DIRS = com/sun/tracing/dtrace
+
+#
+# Rules.
+#
+include $(BUILDDIR)/common/Classes.gmk
--- a/make/docs/Makefile	Tue Apr 15 17:46:47 2008 -0700
+++ b/make/docs/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -273,6 +273,28 @@
 # SMARTCARDIO_PKGS is located in NON_CORE_PKGS.gmk
 
 #
+# Variables used by TRACING target
+#
+
+TRACING_SOURCEPATH  = $(TOPDIR)/src/share/classes
+TRACING_DOCDIR	 = $(DOCSDIR)/jre/api/tracing
+
+TRACING_JAVADOCFLAGS = $(COMMON_JAVADOCFLAGS)			    \
+		   -encoding ascii			            \
+                   -nodeprecatedlist                                \
+                   -d $(TRACING_DOCDIR)				    \
+                   -sourcepath $(TRACING_SOURCEPATH)                \
+                   -windowtitle $(TRACING_WINDOWTITLE)              \
+                   -doctitle $(TRACING_DOCTITLE)                    \
+                   -header $(TRACING_JAVADOCHEADER)                 \
+                   -linkoffline ../../../../../api $(DOCSDIR)/api/
+
+TRACING_WINDOWTITLE = "Tracing"
+TRACING_DOCTITLE    = "Java$(TRADEMARK) Platform Tracing"
+TRACING_JAVADOCHEADER      = "Platform Tracing"
+# TRACING_PKGS is located in NON_CORE_PKGS.gmk
+
+#
 # Variables used by HTTPSERVER target
 #
 
@@ -420,6 +442,7 @@
     jaasdocs \
     jgssdocs \
     smartcardiodocs \
+    tracingdocs \
     httpserverdocs  \
     mgmtdocs \
     attachdocs \
@@ -585,6 +608,14 @@
 	$(JAVADOC_CMD) $(SMARTCARDIO_JAVADOCFLAGS)                     \
 		   $(SMARTCARDIO_PKGS)
 
+.PHONY: tracingdocs
+tracingdocs:
+	@# ######## api-tracing ############################
+	$(RM) -r $(DTRACE_DOCDIR)
+	$(MKDIR) -p $(DTRACE_DOCDIR)
+	$(JAVADOC) $(DTRACE_JAVADOCFLAGS)                     \
+		   $(DTRACE_PKGS)
+
 .PHONY: httpserverdocs
 httpserverdocs:
 	@# ######## api-httpserver #######################
--- a/make/docs/NON_CORE_PKGS.gmk	Tue Apr 15 17:46:47 2008 -0700
+++ b/make/docs/NON_CORE_PKGS.gmk	Thu Apr 17 22:00:16 2008 -0400
@@ -84,6 +84,9 @@
 
 SMARTCARDIO_PKGS = javax.smartcardio
 
+TRACING_PKGS     = com.sun.tracing         \
+                   com.sun.tracing.dtrace
+
 # non-core packages in rt.jar
 NON_CORE_PKGS    = $(DOMAPI_PKGS) \
                    $(MGMT_PKGS) \
@@ -91,4 +94,5 @@
                    $(JGSS_PKGS) \
                    $(OLD_JSSE_PKGS) \
                    $(HTTPSERVER_PKGS) \
-                   $(SMARTCARDIO_PKGS)
+                   $(SMARTCARDIO_PKGS) \
+                   $(TRACING_PKGS)
--- a/make/sun/Makefile	Tue Apr 15 17:46:47 2008 -0700
+++ b/make/sun/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -63,7 +63,7 @@
           $(HEADLESS_SUBDIR) $(DGA_SUBDIR) \
 	  font jpeg cmm applet rmi beans $(JDBC_SUBDIR) \
 	  jawt text nio launcher management $(ORG_SUBDIR) \
-          native2ascii serialver tools jconsole
+          native2ascii serialver tools jconsole tracing
 
 all build clean clobber::
 	$(SUBDIRS-loop)
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/sun/tracing/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,26 @@
+#
+# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+# SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+#
+
+#
+# Makefile for building tracing package implementation classes
+#
+
+BUILDDIR = ../..
+PACKAGE = sun.tracing
+PRODUCT = sun
+include $(BUILDDIR)/common/Defs.gmk
+
+SUBDIRS = dtrace 
+all build:
+	$(SUBDIRS-loop)
+clean clobber::
+	$(SUBDIRS-loop)
+
+AUTO_FILES_JAVA_DIRS = sun/tracing
+
+#
+# Rules.
+#
+include $(BUILDDIR)/common/Classes.gmk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/sun/tracing/dtrace/Makefile	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,59 @@
+#
+# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+# SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+#
+
+#
+# Makefile for building dtrace extension
+#
+BUILDDIR = ../../..
+PACKAGE = sun.tracing.dtrace
+LIBRARY = jsdt
+PRODUCT = sun
+include $(BUILDDIR)/common/Defs.gmk
+
+#
+# Use mapfile
+#
+FILES_m = mapfile-vers
+include $(BUILDDIR)/common/Mapfile-vers.gmk
+
+NATIVE_DTRACE_DIR=native/sun/tracing/dtrace
+
+SRCDIR=$(SHARE_SRC)/$(NATIVE_DTRACE_DIR)
+PSRCDIR=$(PLATFORM_SRC)/$(NATIVE_DTRACE_DIR)
+
+FILES_c = JVM.c jvm_symbols_md.c
+
+FILES_java = \
+    sun/tracing/dtrace/Activation.java \
+    sun/tracing/dtrace/DTraceProvider.java \
+    sun/tracing/dtrace/DTraceProbe.java \
+    sun/tracing/dtrace/DTraceProviderFactory.java \
+    sun/tracing/dtrace/JVM.java 
+
+FILES_export = $(FILES_java)
+
+ifeq ($(PLATFORM), linux)
+OTHER_LDLIBS += -ldl
+endif
+
+#
+# Use JNI for generating header files
+#
+JAVAHFLAGS += -jni
+
+#
+# Don't need to link against -ljava
+#
+JAVALIB= 
+
+#
+# Rules.
+#
+include $(BUILDDIR)/common/Library.gmk
+
+#
+# Add to ambient vpath so we pick up the library files
+#
+vpath %.c $(SRCDIR):$(PSRCDIR)
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/sun/tracing/dtrace/mapfile-vers	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,19 @@
+#
+#ident "@(#)mapfile-vers	1.1 07/08/14"
+# 
+# Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+# SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+#
+
+# Define library interface.
+
+SUNWprivate_1.1 {
+    global:
+        Java_sun_tracing_dtrace_JVM_isSupported0;
+        Java_sun_tracing_dtrace_JVM_activate0;
+        Java_sun_tracing_dtrace_JVM_dispose0;
+        Java_sun_tracing_dtrace_JVM_isEnabled0;
+        Java_sun_tracing_dtrace_JVM_defineClass0;
+    local:
+        *;
+};
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/Probe.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing;
+
+/**
+ * The {@code Probe} interface represents a tracepoint.
+ *
+ * A {@code Probe} instance is obtained by calling the
+ * {@code Provider.getProbe()} method of a provider instance created by
+ * {@code ProviderFactory.createProvider()}.  A {@code Probe} can be used to
+ * trigger a probe manually (provided the correct arguments are passed to
+ * it), or to check a probe to see if anything is currently tracing it.
+ * <p>
+ * A tracing check can be used to avoid lengthy work that might be
+ * needed to set up the probe's arguments.  However, checking
+ * whether the probe is enabled generally takes the same amount of time
+ * as actually triggering the probe. So, you should only check a probe's status
+ * without triggering it if setting up the arguments is very expensive.
+ * <p>
+ * Users do not need to implement this interface: instances are
+ * created automatically by the system when a {@code Provider)} instance is
+ * created.
+ * <p>
+ * @since 1.7
+ */
+
+public interface Probe {
+    /**
+     * Checks whether there is an active trace of this probe.
+     *
+     * @return true if an active trace is detected.
+     */
+    boolean isEnabled();
+
+    /**
+     * Determines whether a tracepoint is enabled.
+     *
+     * Typically, users do not need to use this method. It is called
+     * automatically when a Provider's instance method is called. Calls to
+     * this method expect the arguments to match the declared parameters for
+     * the method associated with the probe.
+     *
+     * @param args the parameters to pass to the method.
+     * @throws IllegalArgumentException if the provided parameters do not
+     * match the method declaration for this probe.
+     */
+    void trigger(Object ... args);
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/ProbeName.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * An annotation used to override the name of a probe.
+ * <p>
+ * This annotation can be added to a method in a user-defined {@code Provider}
+ * interface, to set the name that will be used for the generated probe
+ * associated with that method.  Without this annotation, the name will be the
+ * name of the method.
+ * <p>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface ProbeName {
+    String value();
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/Provider.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing;
+
+/**
+ * {@code Provider} is a superinterface for user-defined tracing providers.
+ * <p>
+ * To define tracepoints, users must extend this interface
+ * and then use a {@code ProviderFactory} to create an instance of the
+ * newly-defined interface.  Each method in the defined interface represents a
+ * tracepoint (or probe), which can be triggered by calling the associated
+ * method on the returned instance.
+ * <p>
+ * This interface also contains a {@code getProbe()} method, which can be
+ * used to get direct handles to the {@code Probe} objects themselves.
+ * {@code Probe} objects can be triggered manually, or they can be queried to
+ * check their state.
+ * <p>
+ * When an application has finished triggering probes, it should call
+ * {@code dispose()} to free up any system resources associated with the
+ * Provider.
+ * <p>
+ * All methods declared in a subclass of this interface should have a
+ * {@code void} return type. Methods can have parameters, and when called the
+ * values of the arguments will be passed to the tracing implementation.
+ * If any methods do not have a {@code void} return type, an
+ * {@code java.lang.IllegalArgumentException} will be thrown when the
+ * provider is registered.
+ * @since 1.7
+ */
+
+public interface Provider {
+    /**
+     * Retrieves a reference to a Probe object, which is used to check status
+     * or to trigger the probe manually.
+     *
+     * If the provided method parameter is not a method of the provider
+     * interface,  or if the provider interface has been disposed, then
+     * this returns null
+     *
+     * @param method a method declared in the provider.
+     * @return the specified probe represented by that method, or null.
+     */
+    Probe getProbe(java.lang.reflect.Method method);
+
+    /**
+     * Disposes system resources associated with this provider.
+     *
+     * After calling this method, triggering the probes will have no effect.
+     * Additional calls to this method after the first call are ignored.
+     */
+    void dispose();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/ProviderFactory.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,110 @@
+
+package com.sun.tracing;
+
+import java.util.HashSet;
+import java.io.PrintStream;
+import java.lang.reflect.Field;
+import java.util.logging.Logger;
+
+import sun.tracing.NullProviderFactory;
+import sun.tracing.PrintStreamProviderFactory;
+import sun.tracing.MultiplexProviderFactory;
+import sun.tracing.dtrace.DTraceProviderFactory;
+
+/**
+ * {@code ProviderFactory} is a factory class used to create instances of
+ * providers.
+ *
+ * To enable tracing in an application, this class must be used to create
+ * instances of the provider interfaces defined by users.
+ * The system-defined factory is obtained by using the
+ * {@code getDefaultFactory()} static method.  The resulting instance can be
+ * used to create any number of providers.
+ *
+ * @since 1.7
+ */
+public abstract class ProviderFactory {
+
+    protected ProviderFactory() {}
+
+    /**
+     * Creates an implementation of a Provider interface.
+     *
+     * @param cls the provider interface to be defined.
+     * @return an implementation of {@code cls}, whose methods, when called,
+     * will trigger tracepoints in the application.
+     * @throws NullPointerException if cls is null
+     * @throws IllegalArgumentException if the class definition contains
+     * non-void methods
+     */
+    public abstract <T extends Provider> T createProvider(Class<T> cls);
+
+    /**
+     * Returns an implementation of a {@code ProviderFactory} which
+     * creates instances of Providers.
+     *
+     * The created Provider instances will be linked to all appropriate
+     * and enabled system-defined tracing mechanisms in the JDK.
+     *
+     * @return a {@code ProviderFactory} that is used to create Providers.
+     */
+    public static ProviderFactory getDefaultFactory() {
+        HashSet<ProviderFactory> factories = new HashSet<ProviderFactory>();
+
+        // Try to instantiate a DTraceProviderFactory
+        String prop = null;
+        try { prop = System.getProperty("com.sun.tracing.dtrace"); }
+        catch (java.security.AccessControlException e) {
+            Logger.getAnonymousLogger().fine(
+                "Cannot access property com.sun.tracing.dtrace");
+        }
+        if ( (prop == null || !prop.equals("disable")) &&
+             DTraceProviderFactory.isSupported() ) {
+            factories.add(new DTraceProviderFactory());
+        }
+
+        // Try to instantiate an output stream factory
+        try { prop = System.getProperty("sun.tracing.stream"); }
+        catch (java.security.AccessControlException e) {
+            Logger.getAnonymousLogger().fine(
+                "Cannot access property sun.tracing.stream");
+        }
+        if (prop != null) {
+            for (String spec : prop.split(",")) {
+                PrintStream ps = getPrintStreamFromSpec(spec);
+                if (ps != null) {
+                    factories.add(new PrintStreamProviderFactory(ps));
+                }
+            }
+        }
+
+        // See how many factories we instantiated, and return an appropriate
+        // factory that encapsulates that.
+        if (factories.size() == 0) {
+            return new NullProviderFactory();
+        } else if (factories.size() == 1) {
+            return factories.toArray(new ProviderFactory[1])[0];
+        } else {
+            return new MultiplexProviderFactory(factories);
+        }
+    }
+
+    private static PrintStream getPrintStreamFromSpec(String spec) {
+        try {
+            // spec is in the form of <class>.<field>, where <class> is
+            // a fully specified class name, and <field> is a static member
+            // in that class.  The <field> must be a 'PrintStream' or subtype
+            // in order to be used.
+            int fieldpos = spec.lastIndexOf('.');
+            Class<?> cls = Class.forName(spec.substring(0, fieldpos));
+            Field f = cls.getField(spec.substring(fieldpos + 1));
+            Class<?> fieldType = f.getType();
+            return (PrintStream)f.get(null);
+        } catch (Exception e) {
+            Logger.getAnonymousLogger().warning(
+                "Could not parse sun.tracing.stream property: " + e);
+        }
+        return null;
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/ProviderName.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * An annotation used to specify the name of a provider.
+ * <p>
+ * This annotation can be added to a user-defined {@code Provider}
+ * interface, to set the name that will be used
+ * for the provider in the generated probes.  Without this annotation,
+ * the simple class name of the provider interface is used.
+ * <p>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface ProviderName {
+    String value();
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/ArgsAttributes.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+
+/**
+ * This annotation describes the interface attributes of the probe arguments in
+ * a single provider.
+ *
+ * This annotation can be added to a user-defined {@code Provider} specification
+ * interface to set the stability attributes of the probe arguments, for
+ * all the probes specified in that provider.
+ * <p>
+ * If this annotation is not present, the interface attributes for the
+ * arguments are Private/Private/Unknown.
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.TYPE })
+public @interface ArgsAttributes {
+  Attributes value();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/Attributes.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+
+/**
+ * This annotation describes the interface's field attributes
+ * for the probes in a provider.
+ *
+ * This annotation provides the contents of field-specific annotations
+ * that specify the stability attributes and dependency class of a
+ * particular field, for the probes in a provider.
+ * <p>
+ * The default interface attributes for unspecified fields is
+ * Private/Private/Unknown.
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({})
+public @interface Attributes {
+  /**
+   * The stability level of the name.
+   */
+  StabilityLevel name() default StabilityLevel.PRIVATE;
+
+  /**
+   * The stability level of the data.
+   */
+  StabilityLevel data() default StabilityLevel.PRIVATE;
+
+  /**
+   * The interface attribute's dependency class.
+   */
+  DependencyClass dependency()  default DependencyClass.UNKNOWN;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/DependencyClass.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+/**
+ * Enumeration for the DTrace dependency classes.
+ *
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide for details, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+public enum DependencyClass {
+    /**
+     * The interface has an unknown set of architectural dependencies.
+     */
+    UNKNOWN  (0),
+    /**
+     * The interface is specific to the CPU model of the current system.
+     */
+    CPU      (1),
+    /**
+     * The interface is specific to the hardware platform of the current
+     * system.
+     */
+    PLATFORM (2),
+    /**
+     * The interface is specific to the hardware platform group of the
+     * current system.
+     */
+    GROUP    (3),
+    /**
+     * The interface is specific to the instruction set architecture (ISA)
+     * supported by the microprocessors on this system.
+     */
+    ISA      (4),
+    /**
+     * The interface is common to all Solaris systems regardless of the
+     * underlying hardware.
+     */
+    COMMON   (5);
+
+    public String toDisplayString() {
+        return toString().substring(0,1) +
+               toString().substring(1).toLowerCase();
+    }
+
+    public int getEncoding() { return encoding; }
+
+    private int encoding;
+
+    private DependencyClass(int encoding) {
+        this.encoding = encoding;
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/FunctionAttributes.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * This annotation describes the interface attributes of the
+ * {@code function} field for a single provider.
+ *
+ * This annotation can be added to a user-defined {@code Provider} specification
+ * interface to set the stability attributes of the {@code function} field for
+ * all probes specified in that provider.
+ * <p>
+ * If this annotation is not present, the interface attributes for the
+ * {@code function} field are Private/Private/Unknown.
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.TYPE })
+public @interface FunctionAttributes {
+    Attributes value();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/FunctionName.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * An annotation used to specify the {@code function} field for a DTrace probe.
+ *
+ * This annotation can be added to a method in a user-defined Provider
+ * specification interface to set the {@code function} field that is used
+ * for the generated DTrace probe associated with that method.
+ * <p>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface FunctionName {
+    String value();
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/ModuleAttributes.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * This annotation is used to describe the interface attributes of the
+ * {@code module} field for a single provider.
+ *
+ * This annotation can be added to a user-defined Provider specification
+ * interface to set the stability attributes of the {@code module} field for
+ * all probes specified in that provider.
+ * <p>
+ * If this annotation is not present, the interface attributes for the
+ * {@code module} field is Private/Private/Unknown.
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.TYPE })
+public @interface ModuleAttributes {
+    Attributes value();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/ModuleName.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * An annotation used to specify the {@code module} field for a DTrace probe.
+ *
+ * This annotation can be added to a method in a user-defined Provider
+ * specification interface to set the {@code module} field that will be used
+ * for the generated DTrace probe associated with that method.
+ * <p>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface ModuleName {
+    String value();
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/NameAttributes.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * This annotation describes the interface attributes of the
+ * {@code name} field for a single provider.
+ *
+ * This annotation can be added to a user-defined Provider specification
+ * interface to set the stability attributes of the {@code name} field for
+ * all probes specified in that provider.
+ * <p>
+ * If this annotation is not present, the interface attributes for the
+ * {@code name} field will be Private/Private/Unknown.
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.TYPE })
+public @interface NameAttributes {
+    Attributes value();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/ProviderAttributes.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+import java.lang.annotation.Target;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.ElementType;
+
+/**
+ * This annotation is used to describe the interface attributes of the
+ * {@code provider} field for a single provider.
+ *
+ * This annotation can be added to a user-defined Provider specification
+ * interface to set the stability attributes of the {@code provider} field for
+ * all probes specified in that provider.
+ * <p>
+ * If this annotation is not present, the interface attributes for the
+ * {@code provider} field will be Private/Private/Unknown.
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.TYPE })
+public @interface ProviderAttributes {
+    Attributes value();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/StabilityLevel.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package com.sun.tracing.dtrace;
+
+/**
+ * Enumeration for the DTrace stability levels.
+ *
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ * @since 1.7
+ */
+public enum StabilityLevel {
+    /**
+     * The interface is private to DTrace and represents an implementation
+     * detail of DTrace.
+     */
+    INTERNAL  (0),
+    /**
+     * The interface is private to Sun for use by other Sun products. It is
+     * not yet publicly documented for use by customers and ISVs.
+     */
+    PRIVATE  (1),
+    /**
+     * The interface is supported in the current release but is scheduled
+     * to be removed, most likely in a future minor release.
+     */
+    OBSOLETE (2),
+    /**
+     * The interface is controlled by an entity other than Sun.
+     */
+    EXTERNAL (3),
+    /**
+     * The interface gives developers early access to new or
+     * rapidly changing technology or to an implementation artifact that is
+     * essential for observing or debugging system behavior. A more
+     * stable solution is anticipated in the future.
+     */
+    UNSTABLE (4),
+    /**
+     * The interface might eventually become Standard or Stable but is
+     * still in transition.
+     */
+    EVOLVING (5),
+    /**
+     * The interface is a mature interface under Sun's control.
+     */
+    STABLE   (6),
+    /**
+     * The interface complies with an industry standard.
+     */
+    STANDARD (7);
+
+    String toDisplayString() {
+        return toString().substring(0,1) +
+               toString().substring(1).toLowerCase();
+    }
+
+    public int getEncoding() { return encoding; }
+
+    private int encoding;
+
+    private StabilityLevel(int encoding) {
+        this.encoding = encoding;
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/dtrace/package-info.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+/**
+ * This package contains annotations and enumerations that are used to
+ * add DTrace-specific information to a tracing provider.
+ * <p>
+ * The DTrace-specific annotations modify the attributes of a DTrace provider
+ * implementation when it is used by the tracing subsystem.  The annotations are
+ * added to a {@code com.sun.tracing} provider specification to control
+ * specific attributes of the provider as it relates to DTrace.
+ * <p>
+ * Any other tracing subsystems supported by the system will ignore these
+ * annotations.
+ * <p>
+ * DTrace probes have additional fields and stability attributes that are
+ * not accounted for in the generic tracing package.  If unspecified, the
+ * default values are used for the stability and dependency attributes of
+ * probes, as well as for the module and field names of the generated probes.
+ * The values can be specified by adding the appropriate annotations to the
+ * provider specification.
+ * <p>
+ * The {@code FunctionName} annotation is used to annotate the tracepoint
+ * methods defined in the provider specification.  The value of this annotation
+ * is used as the {@code function} field in the generated DTrace probes. It
+ * is typically set to the name of the enclosing function where the
+ * tracepoint is triggered.
+ * <p>
+ * The {@code ModuleName} annotation is used to annotate the provider
+ * specification itself and applies to all the probes in the provider.  It
+ * sets the value of the {@code module} field in the generated DTrace probes.
+ * <p>
+ * The remaining annotations, are also applied to the provider itself, and
+ * are used to set the stability and dependency attributes of all probes in
+ * that provider.  Each probe field and the probe arguments can be
+ * independently assigned interface attributes to control the stability
+ * ratings of the probes.
+ * <p>
+ * Here is an example of how to declare a provider, specifying additional DTrace
+ * data:
+<PRE>
+    &#064;ProviderName("my_app_provider")
+    &#064;ModuleName("app.jar")
+    &#064;ProviderAttributes(&#064;Attributes={
+        name=StabilityLevel.STABLE,data=StabilityLevel.STABLE,
+        dependency=DependencyClass.COMMON})
+    &#064;ProbeAttributes(&#064;Attributes={
+        name=StabilityLevel.STABLE,data=StabilityLevel.STABLE,
+        dependency=DependencyClass.COMMON})
+    &#064;ModuleAttributes(&#064;Attributes={name=StabilityLevel.UNSTABLE})
+    public class MyProvider {
+        &#064;FunctionName("main") void startProbe();
+    }
+</PRE>
+ * <p>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlms?a=view">Solaris Dynamic Tracing Guide, Chapter 34: Statically Defined Tracing for User Applications</a>
+ * @see <a href="http://docs.sun.com/app/docs/doc/817-6223/6mlkidlnp?a=view">Solaris Dynamic Tracing Guide, Chapter 39: Stability</a>
+ */
+
+package com.sun.tracing.dtrace;
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tracing/package-info.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+/**
+ * This package provides a mechanism for defining and
+ * inserting tracepoints into Java-technology based applications, which
+ * can then be monitored by the tracing tools available on the system.
+ * <p>
+ * To add tracepoints to a program, you must first decide where to place the
+ * tracepoints, what the logical names are for these points, what information
+ * will be available to the tracing mechanisms at each point, and decide upon
+ * any logical grouping.
+ * <p>
+ * You add instrumentation to a program in three steps:
+ * <ul>
+ * <li>First, declare tracepoints by creating interfaces to define
+ * them, and include these interfaces in the program definition.
+ * The declared interfaces are standard Java technology-based
+ * interfaces and are compiled with the program.</li>
+ * <li>Second, add code in the application to create an instance of the
+ * interface at some point during the initialization of the application,
+ * using a factory class provided by the system. The reference to the
+ * instance can be stored as a global static, or passed as context to all
+ * the places where it is needed.</li>
+ * <li>Finally, add the actual tracepoints to the desired locations in the
+ * application by inserting a call to one of the methods defined in the
+ * interface, via the factory-created reference.</li>
+ * </ul>
+ * <p>
+ * The method calls representing the tracepoints have no logical
+ * impact on the program.  The side effect of the call is that any
+ * activated tracing mechanisms will be notified that the tracepoint has
+ * been hit, and will take whatever actions are appropriate (for example,
+ * logging  the tracepoint, or triggering a DTrace probe, etc.).  In most
+ * cases, the impact on performance of adding tracepoints to the application
+ * will be minimal.
+ * <p>
+ * Each logical grouping of tracepoints should be defined in a common
+ * interface, called a <i>provider</i>.  An application can have one or many
+ * providers.  Each provider is independent and can be created whenever
+ * it is appropriate for that provider, for example, when a subsytem is
+ * initialized.  Providers should be disposed of when they are no longer
+ * needed, to free up any associated system resources.  Each tracepoint
+ * in a provider is represented by a method in that interface.  These methods
+ * are referred to as <i>probes</i>.  The method signature determines the probe
+ * parameters.  A call to the method with the specified parameters triggers
+ * the probe and makes its parameter values visible to any associated tracing
+ * mechanism.
+ * <p>
+ * User-defined interfaces which represent providers must extend the
+ * {@code Provider} interface.  To activate the system-defined
+ * tracing mechanisms, you must obtain an instance of the
+ * {@code ProviderFactory} class, and pass the class of the provider to
+ * the {@code createProvider()} method.  The returned instance is then used to
+ * trigger the probes later in the application.
+ * <p>
+ * In addition to triggering the probes, the provider instance can be used
+ * to obtain direct references to the {@code Probe} objects, which can be used
+ * directly for triggering, or can be queried to determine whether the probe is
+ * currently being traced.  The {@code Provider} interface also defines a
+ * {@code Provider.dispose()} method which is used to free up any resources
+ * that might be associated with that provider.
+ * <p>
+ * When a probe is triggered, any activated tracing system will be given
+ * the provider name, the probe name, and the values of the probe arguments.
+ * The tracing system is free to consume this data is whatever way is
+ * appropriate.
+ * By default, the provider name is the same as the class name of the interface
+ * that defines the provider. Similarly, the probe name is
+ * the name of the method that defines the probe. These default values
+ * can be over-ridden by annotations.  The provider definition can be
+ * annotated with the {@code @ProviderName} annotation, whose value will
+ * indicate the provider name that the tracing system will use.  Similarly,
+ * the {@code @ProbeName} annotation annotates a declared method and
+ * indicates the probe name that should be used in the place of the
+ * method name.  These annotations can be used to define providers and
+ * probes with the same name, in cases where the semantics of the Java language
+ * may prevent this.
+ * <p>
+ * Here is a very small and simple usage example:
+ * <p>
+ *
+<PRE>
+   import com.sun.tracing.Provider;
+   import com.sun.tracing.ProviderFactory;
+
+   interface MyProvider extends Provider {
+       void startProbe();
+       void finishProbe(int value);
+   }
+
+   public class MyApplication {
+       public static void main(String argv[]) {
+           ProviderFactory factory = ProviderFactory.getDefaultFactory();
+           MyProvider trace = factory.createProvider(MyProvider.class);
+
+           trace.startProbe();
+           int result = foo();
+           trace.finishProbe(result);
+
+           trace.dispose();
+       }
+   }
+</PRE>
+ * <p>
+ * The Java Development Kit (JDK) currently only includes one system-defined
+ * tracing framework: DTrace. DTrace is enabled automatically whenever an
+ * application is run on a system and a JDK release that supports it. When
+ * DTrace is enabled, probes are made available for listing and matching by
+ * DTrace scripts as soon as the provider is created. At the tracepoint, an
+ * associated DTrace script is informed of the creation of the provider, and
+ * it takes whatever action it is designed to take. Tracepoints in the
+ * program have the following DTrace probe names:<br>
+ *   {@code <provider><pid>:<module>:<function>:<probe>}
+ * Where:
+ * <ul>
+ * <li>{@code <provider>} the provider name as specified by the application</li>
+ * <li>{@code <pid>} the operating system process ID</li>
+ * <li>{@code <module>} undefined, unless specified by the application</li>
+ * <li>{@code <function>} undefined, unless specified by the application</li>
+ * <li>{@code <probe>} the probe name as specified by the application</li>
+ * </ul>
+ * <p>
+ * The {@code com.sun.tracing.dtrace} package contains additional
+ * annotations that can be used to control the names used for the
+ * <code>module</code> and <code>function</code> fields, as well as annotations
+ * that can be added to the provider to control probe stability and dependency
+ * attributes.
+ * <p>
+ * Integer, float and string probe parameters are made available to DTrace
+ * using
+ * the built-in argument variables, {@code arg0 ... arg_n}.  Integer-types
+ * are passed by value (boxed values are unboxed), floating-point types are
+ * passed as encoded integer
+ * arguments, and {@code java.lang.String} objects are converted
+ * to UTF8 strings, so they can be read into the DTrace script using the
+ * {@code copyinstr()} intrinsic.  Non-string and non-boxed primitive
+ * reference arguments are only
+ * placeholders and have no value.
+ * <p>
+ * Using the example above, with a theoretical process ID of 123, these are
+ * the probes that can be traced from DTrace:
+<PRE>
+    MyProvider123:::startProbe
+    MyProvider123:::finishProbe
+</PRE>
+ * When {@code finishProbe} executes, {@code arg0} will contain the
+ * value of {@code result}.
+ * <p>
+ * The DTrace tracing mechanism is enabled for all providers, apart from in the
+ * following circumstances:
+ * <ul>
+ * <li>DTrace is not supported on the underlying system.</li>
+ * <li>The property {@code com.sun.tracing.dtrace} is set to "disable".</li>
+ * <li>The RuntimePermission {@code com.sun.tracing.dtrace.createProvider}
+ * is denied to the process.</li>
+ * </ul>
+ * <p>
+ */
+
+package com.sun.tracing;
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/MultiplexProviderFactory.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.InvocationTargetException;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.logging.Logger;
+
+import com.sun.tracing.ProviderFactory;
+import com.sun.tracing.Provider;
+import com.sun.tracing.Probe;
+
+/**
+ * Factory class to create tracing Providers.
+ *
+ * This factory creates a "multiplex provider", which is a provider that
+ * encapsulates a list of providers and whose probes trigger a corresponding
+ * trigger in each of the encapsulated providers' probes.
+ *
+ * This is used when there are multiple tracing frameworks activated at once.
+ * A user-defined provider gets implementation for each of the activated
+ * frameworks and this multiplex framework is what is ultimately passed
+ * back to the user.  All probe triggers are multiplexed to each
+ * active framework.
+ *
+ * @since 1.7
+ */
+public class MultiplexProviderFactory extends ProviderFactory {
+
+    private Set<ProviderFactory> factories;
+
+    public MultiplexProviderFactory(Set<ProviderFactory> factories) {
+        this.factories = factories;
+    }
+
+    public <T extends Provider> T createProvider(Class<T> cls) {
+        HashSet<Provider> providers = new HashSet<Provider>();
+        for (ProviderFactory factory : factories) {
+            providers.add(factory.createProvider(cls));
+        }
+        MultiplexProvider provider = new MultiplexProvider(cls, providers);
+        try {
+            provider.init();
+        } catch (Exception e) {
+            // Probably a permission problem (can't get declared members)
+            Logger.getAnonymousLogger().warning(
+                "Could not initialize tracing provider: " + e.getMessage());
+        }
+        return provider.newProxyInstance();
+    }
+}
+
+class MultiplexProvider extends ProviderSkeleton {
+
+    private Set<Provider> providers;
+
+    protected ProbeSkeleton createProbe(Method m) {
+        return new MultiplexProbe(m, providers);
+    }
+
+    MultiplexProvider(Class<? extends Provider> type, Set<Provider> providers) {
+        super(type);
+        this.providers = providers;
+    }
+
+    public void dispose() {
+        for (Provider p : providers) {
+            p.dispose();
+        }
+        super.dispose();
+    }
+}
+
+class MultiplexProbe extends ProbeSkeleton {
+
+    private Set<Probe> probes;
+
+    MultiplexProbe(Method m, Set<Provider> providers) {
+        super(m.getParameterTypes());
+        probes = new HashSet<Probe>();
+        for (Provider p : providers) {
+            Probe probe = p.getProbe(m);
+            if (probe != null) {
+                probes.add(probe);
+            }
+        }
+    }
+
+    public boolean isEnabled() {
+        for (Probe p : probes) {
+            if (p.isEnabled()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public void uncheckedTrigger(Object[] args) {
+        for (Probe p : probes) {
+            try {
+                // try the fast path
+                ProbeSkeleton ps = (ProbeSkeleton)p;
+                ps.uncheckedTrigger(args);
+            } catch (ClassCastException e) {
+                // Probe.trigger takes an "Object ..." varargs parameter,
+                // so we can't call it directly.
+                try {
+                    Method m = Probe.class.getMethod(
+                        "trigger", Class.forName("[java.lang.Object"));
+                    m.invoke(p, args);
+                } catch (Exception e1) {
+                    assert false; // This shouldn't happen
+                }
+            }
+        }
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/NullProviderFactory.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing;
+
+import java.lang.reflect.Method;
+import java.util.logging.Logger;
+
+import com.sun.tracing.ProviderFactory;
+import com.sun.tracing.Provider;
+
+/**
+ * Factory class to create tracing Providers.
+ *
+ * This factory will create tracing instances that do nothing.
+ * It is used when no tracing is desired, but Provider instances still
+ * must be generated so that tracing calls in the application continue to
+ * run.
+ *
+ * @since 1.7
+ */
+public class NullProviderFactory extends ProviderFactory {
+
+    /**
+     * Creates and returns a Null provider.
+     *
+     * See comments at {@code ProviderSkeleton.createProvider()} for more
+     * details.
+     *
+     * @return a provider whose probe trigger are no-ops.
+     */
+    public <T extends Provider> T createProvider(Class<T> cls) {
+        NullProvider provider = new NullProvider(cls);
+        try {
+            provider.init();
+        } catch (Exception e) {
+            // Probably a permission problem (can't get declared members)
+            Logger.getAnonymousLogger().warning(
+                "Could not initialize tracing provider: " + e.getMessage());
+        }
+        return provider.newProxyInstance();
+    }
+}
+
+class NullProvider extends ProviderSkeleton {
+
+    NullProvider(Class<? extends Provider> type) {
+        super(type);
+    }
+
+    protected ProbeSkeleton createProbe(Method m) {
+        return new NullProbe(m.getParameterTypes());
+    }
+}
+
+class NullProbe extends ProbeSkeleton {
+
+    public NullProbe(Class<?>[] parameters) {
+        super(parameters);
+    }
+
+    public boolean isEnabled() {
+        return false;
+    }
+
+    public void uncheckedTrigger(Object[] args) {
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/PrintStreamProviderFactory.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing;
+
+import java.lang.reflect.Method;
+import java.io.PrintStream;
+import java.util.HashMap;
+import java.util.logging.Logger;
+
+import com.sun.tracing.ProviderFactory;
+import com.sun.tracing.Provider;
+import com.sun.tracing.ProviderName;
+import com.sun.tracing.Probe;
+import com.sun.tracing.ProbeName;
+
+/**
+ * Factory class to create tracing Providers.
+ *
+ * This factory will create tracing instances that print to a PrintStream
+ * when activated.
+ *
+ * @since 1.7
+ */
+public class PrintStreamProviderFactory extends ProviderFactory {
+
+    private PrintStream stream;
+
+    public PrintStreamProviderFactory(PrintStream stream) {
+        this.stream = stream;
+    }
+
+    public <T extends Provider> T createProvider(Class<T> cls) {
+        PrintStreamProvider provider = new PrintStreamProvider(cls, stream);
+        try {
+            provider.init();
+        } catch (Exception e) {
+            // Probably a permission problem (can't get declared members)
+            Logger.getAnonymousLogger().warning(
+                "Could not initialize tracing provider: " + e.getMessage());
+        }
+        return provider.newProxyInstance();
+    }
+}
+
+class PrintStreamProvider extends ProviderSkeleton {
+
+    private PrintStream stream;
+    private String providerName;
+
+    protected ProbeSkeleton createProbe(Method m) {
+        String probeName = getAnnotationString(m, ProbeName.class, m.getName());
+        return new PrintStreamProbe(this, probeName, m.getParameterTypes());
+    }
+
+    PrintStreamProvider(Class<? extends Provider> type, PrintStream stream) {
+        super(type);
+        this.stream = stream;
+        this.providerName = getProviderName();
+    }
+
+    PrintStream getStream() {
+        return stream;
+    }
+
+    String getName() {
+        return providerName;
+    }
+}
+
+class PrintStreamProbe extends ProbeSkeleton {
+
+    private PrintStreamProvider provider;
+    private String name;
+
+    PrintStreamProbe(PrintStreamProvider p, String name, Class<?>[] params) {
+        super(params);
+        this.provider = p;
+        this.name = name;
+    }
+
+    public boolean isEnabled() {
+        return true;
+    }
+
+    public void uncheckedTrigger(Object[] args) {
+        StringBuffer sb = new StringBuffer();
+        sb.append(provider.getName());
+        sb.append(".");
+        sb.append(name);
+        sb.append("(");
+        boolean first = true;
+        for (Object o : args) {
+            if (first == false) {
+                sb.append(",");
+            } else {
+                first = false;
+            }
+            sb.append(o.toString());
+        }
+        sb.append(")");
+        provider.getStream().println(sb.toString());
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/ProbeSkeleton.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Field;
+import com.sun.tracing.Probe;
+
+/**
+ * Provides common code for implementation of {@code Probe} classes.
+ *
+ * @since 1.7
+ */
+public abstract class ProbeSkeleton implements Probe {
+
+    protected Class<?>[] parameters;
+
+    protected ProbeSkeleton(Class<?>[] parameters) {
+        this.parameters = parameters;
+    }
+
+    public abstract boolean isEnabled();  // framework-dependent
+
+    /**
+     * Triggers the probe with verified arguments.
+     *
+     * The caller of this method must have already determined that the
+     * arity and types of the arguments match what the probe was
+     * declared with.
+     */
+    public abstract void uncheckedTrigger(Object[] args); // framework-dependent
+
+    private static boolean isAssignable(Object o, Class<?> formal) {
+        if (o != null) {
+            if ( !formal.isInstance(o) ) {
+                if ( formal.isPrimitive() ) { // o might be a boxed primitive
+                    try {
+                        // Yuck.  There must be a better way of doing this
+                        Field f = o.getClass().getField("TYPE");
+                        return formal.isAssignableFrom((Class<?>)f.get(null));
+                    } catch (Exception e) {
+                        /* fall-through. */
+                    }
+                }
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Performs a type-check of the parameters before triggering the probe.
+     */
+    public void trigger(Object ... args) {
+        if (args.length != parameters.length) {
+            throw new IllegalArgumentException("Wrong number of arguments");
+        } else {
+            for (int i = 0; i < parameters.length; ++i) {
+                if ( !isAssignable(args[i], parameters[i]) ) {
+                    throw new IllegalArgumentException(
+                            "Wrong type of argument at position " + i);
+                }
+            }
+            uncheckedTrigger(args);
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/ProviderSkeleton.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,223 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.AnnotatedElement;
+import java.lang.annotation.Annotation;
+import java.util.HashMap;
+
+import com.sun.tracing.Provider;
+import com.sun.tracing.Probe;
+import com.sun.tracing.ProviderName;
+
+/**
+ * Provides a common code for implementation of {@code Provider} classes.
+ *
+ * Each tracing subsystem needs to provide three classes, a factory
+ * (derived from {@code ProviderFactory}, a provider (a subclass of
+ * {@code Provider}, and a probe type (subclass of {@code ProbeSkeleton}).
+ *
+ * The factory object takes a user-defined interface and provides an
+ * implementation of it whose method calls will trigger probes in the
+ * tracing framework.
+ *
+ * The framework's provider class, and its instances, are not seen by the
+ * user at all -- they usually sit in the background and receive and dispatch
+ * the calls to the user's provider interface.  The {@code ProviderSkeleton}
+ * class provides almost all of the implementation needed by a framework
+ * provider.  Framework providers must only provide a constructor and
+ * disposal method, and implement the {@code createProbe} method to create
+ * an appropriate {@code ProbeSkeleton} subclass.
+ *
+ * The framework's probe class provides the implementation of the two
+ * probe methods, {@code isEnabled()} and {@code uncheckedTrigger()}.  Both are
+ * framework-dependent implementations.
+ *
+ * @since 1.7
+ */
+
+public abstract class ProviderSkeleton implements InvocationHandler, Provider {
+
+    protected boolean active; // set to false after dispose() is called
+    protected Class<? extends Provider> providerType; // user's interface
+    protected HashMap<Method, ProbeSkeleton> probes; // methods to probes
+
+
+    /**
+     * Creates a framework-specific probe subtype.
+     *
+     * This method is implemented by the framework's provider and returns
+     * framework-specific probes for a method.
+     *
+     * @param method A method in the user's interface
+     * @return a subclass of ProbeSkeleton for the particular framework.
+     */
+    protected abstract ProbeSkeleton createProbe(Method method);
+
+    /**
+     * Initializes the provider.
+     *
+     * @param type the user's interface
+     */
+    protected ProviderSkeleton(Class<? extends Provider> type) {
+        this.active = false; // in case of some error during initialization
+        this.providerType = type;
+        this.probes = new HashMap<Method,ProbeSkeleton>();
+    }
+
+    /**
+     * Post-constructor initialization routine.
+     *
+     * Subclass instances must be initialized before they can create probes.
+     * It is up to the factory implementations to call this after construction.
+     */
+    public void init() {
+        for (Method m : providerType.getDeclaredMethods()) {
+            if ( m.getReturnType() != Void.TYPE ) {
+                throw new IllegalArgumentException(
+                   "Return value of method is not void");
+            } else {
+                probes.put(m, createProbe(m));
+            }
+        }
+        this.active = true;
+    }
+
+    /**
+     * Magic routine which creates an implementation of the user's interface.
+     *
+     * This method creates the instance of the user's interface which is
+     * passed back to the user.  Every call upon that interface will be
+     * redirected to the {@code invoke()} method of this class (until
+     * overridden by the VM).
+     *
+     * @return an implementation of the user's interface
+     */
+    @SuppressWarnings("unchecked")
+    public <T extends Provider> T newProxyInstance() {
+        return (T)Proxy.newProxyInstance(providerType.getClassLoader(),
+               new Class<?>[] { providerType }, this);
+    }
+
+    /**
+     * Triggers a framework probe when a user interface method is called.
+     *
+     * This method dispatches a user interface method call to the appropriate
+     * probe associated with this framework.
+     *
+     * If the invoked method is not a user-defined member of the interface,
+     * then it is a member of {@code Provider} or {@code Object} and we
+     * invoke the method directly.
+     *
+     * @param proxy the instance whose method was invoked
+     * @param method the method that was called
+     * @param args the arguments passed in the call.
+     * @return always null, if the method is a user-defined probe
+     */
+    public Object invoke(Object proxy, Method method, Object[] args) {
+        if (method.getDeclaringClass() != providerType) {
+            try {
+                return method.invoke(this, args);
+            } catch (IllegalAccessException e) {
+                assert false;
+            } catch (InvocationTargetException e) {
+                assert false;
+            }
+        } else if (active) {
+            ProbeSkeleton p = probes.get(method);
+            if (p != null) {
+                // Skips argument check -- already done by javac
+                p.uncheckedTrigger(args);
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Direct accessor for {@code Probe} objects.
+     *
+     * @param m the method corresponding to a probe
+     * @return the method associated probe object, or null
+     */
+    public Probe getProbe(Method m) {
+        return active ? probes.get(m) : null;
+    }
+
+    /**
+     * Default provider disposal method.
+     *
+     * This is overridden in subclasses as needed.
+     */
+    public void dispose() {
+        active = false;
+        probes.clear();
+    }
+
+    /**
+     * Gets the user-specified provider name for the user's interface.
+     *
+     * If the user's interface has a {@ProviderName} annotation, that value
+     * is used.  Otherwise we use the simple name of the user interface's class.
+     * @return the provider name
+     */
+    protected String getProviderName() {
+        return getAnnotationString(
+                providerType, ProviderName.class, providerType.getSimpleName());
+    }
+
+    /**
+     * Utility method for getting a string value from an annotation.
+     *
+     * Used for getting a string value from an annotation with a 'value' method.
+     *
+     * @param element the element that was annotated, either a class or method
+     * @param annotation the class of the annotation we're interested in
+     * @param defaultValue the value to return if the annotation doesn't
+     * exist, doesn't have a "value", or the value is empty.
+     */
+    protected static String getAnnotationString(
+            AnnotatedElement element, Class<? extends Annotation> annotation,
+            String defaultValue) {
+        String ret = (String)getAnnotationValue(
+                element, annotation, "value", defaultValue);
+        return ret.isEmpty() ? defaultValue : ret;
+    }
+
+    /**
+     * Utility method for calling an arbitrary method in an annotation.
+     *
+     * @param element the element that was annotated, either a class or method
+     * @param annotation the class of the annotation we're interested in
+     * @param methodName the name of the method in the annotation we wish
+     * to call.
+     * @param defaultValue the value to return if the annotation doesn't
+     * exist, or we couldn't invoke the method for some reason.
+     * @return the result of calling the annotation method, or the default.
+     */
+    protected static Object getAnnotationValue(
+            AnnotatedElement element, Class<? extends Annotation> annotation,
+            String methodName, Object defaultValue) {
+        Object ret = defaultValue;
+        try {
+            Method m = annotation.getMethod(methodName);
+            Annotation a = element.getAnnotation(annotation);
+            ret = m.invoke(a);
+        } catch (NoSuchMethodException e) {
+            assert false;
+        } catch (IllegalAccessException e) {
+            assert false;
+        } catch (InvocationTargetException e) {
+            assert false;
+        } catch (NullPointerException e) {
+            assert false;
+        }
+        return ret;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/dtrace/Activation.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing.dtrace;
+
+import java.lang.ref.WeakReference;
+import java.lang.ref.ReferenceQueue;
+import java.security.Permission;
+import java.util.HashSet;
+
+class Activation {
+    private SystemResource resource;
+    private int referenceCount;
+
+    Activation(String moduleName, DTraceProvider[] providers) {
+        SecurityManager security = System.getSecurityManager();
+        if (security != null) {
+            Permission perm =
+                new RuntimePermission("com.sun.tracing.dtrace.createProvider");
+            security.checkPermission(perm);
+        }
+        referenceCount = providers.length;
+        for (DTraceProvider p : providers) {
+            p.setActivation(this);
+        }
+        resource = new SystemResource(
+            this, JVM.activate(moduleName, providers));
+    }
+
+    void disposeProvider(DTraceProvider p) {
+        if (--referenceCount == 0) {
+            resource.dispose();
+        }
+    }
+}
+
+/**
+ * The native resource part of an Activation.
+ *
+ * This holds the native handle.
+ *
+ * If the user loses a reference to a set of Providers without disposing them,
+ * and GC determines the Activation is unreachable, then the next
+ * activation or flush call will automatically dispose the unreachable objects
+ *
+ * The SystemResource instances are creating during activation, and
+ * unattached during disposal.  When created, they always have a
+ * strong reference to them via the {@code resources} static member.  Explicit
+ * {@code dispose} calls will unregister the native resource and remove
+ * references to the SystemResource object.  Absent an explicit dispose,
+ * when their associated Activation object becomes garbage, the SystemResource
+ * object will be enqueued on the reference queue and disposed at the
+ * next call to {@code flush}.
+ */
+class SystemResource extends WeakReference<Activation> {
+
+    private long handle;
+
+    private static ReferenceQueue<Activation> referenceQueue =
+        referenceQueue = new ReferenceQueue<Activation>();
+    static HashSet<SystemResource> resources = new HashSet<SystemResource>();
+
+    SystemResource(Activation activation, long handle) {
+        super(activation, referenceQueue);
+        this.handle = handle;
+        flush();
+        resources.add(this);
+    }
+
+    void dispose() {
+        JVM.dispose(handle);
+        resources.remove(this);
+        handle = 0;
+    }
+
+    static void flush() {
+        SystemResource resource = null;
+        while ((resource = (SystemResource)referenceQueue.poll()) != null) {
+            if (resource.handle != 0) {
+                resource.dispose();
+            }
+        }
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/dtrace/DTraceProbe.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing.dtrace;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.InvocationTargetException;
+
+import sun.tracing.ProbeSkeleton;
+
+class DTraceProbe extends ProbeSkeleton {
+    private Object proxy;
+    private Method declared_method;
+    private Method implementing_method;
+
+    DTraceProbe(Object proxy, Method m) {
+        super(m.getParameterTypes());
+        this.proxy = proxy;
+        this.declared_method = m;
+        try {
+            // The JVM will override the proxy method's implementation with
+            // a version that will invoke the probe.
+            this.implementing_method =  proxy.getClass().getMethod(
+                m.getName(), m.getParameterTypes());
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException("Internal error, wrong proxy class");
+        }
+    }
+
+    public boolean isEnabled() {
+        return JVM.isEnabled(implementing_method);
+    }
+
+    public void uncheckedTrigger(Object[] args) {
+        try {
+            implementing_method.invoke(proxy, args);
+        } catch (IllegalAccessException e) {
+            assert false;
+        } catch (InvocationTargetException e) {
+            assert false;
+        }
+    }
+
+    String getProbeName() {
+        return DTraceProvider.getProbeName(declared_method);
+    }
+
+    String getFunctionName() {
+        return DTraceProvider.getFunctionName(declared_method);
+    }
+
+    Method getMethod() {
+        return implementing_method;
+    }
+
+    Class<?>[] getParameterTypes() {
+        return this.parameters;
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/dtrace/DTraceProvider.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing.dtrace;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.annotation.Annotation;
+import java.util.HashMap;
+
+import sun.tracing.ProviderSkeleton;
+import sun.tracing.ProbeSkeleton;
+import com.sun.tracing.Provider;
+import com.sun.tracing.ProviderName;
+import com.sun.tracing.ProbeName;
+import com.sun.tracing.dtrace.Attributes;
+import com.sun.tracing.dtrace.ModuleName;
+import com.sun.tracing.dtrace.FunctionName;
+import com.sun.tracing.dtrace.StabilityLevel;
+import com.sun.tracing.dtrace.DependencyClass;
+
+import sun.misc.ProxyGenerator;
+
+class DTraceProvider extends ProviderSkeleton {
+
+    private Activation activation;
+    private Object proxy;
+
+    // For proxy generation
+    private final static Class[] constructorParams = { InvocationHandler.class };
+    private final String proxyClassNamePrefix = "$DTraceTracingProxy";
+
+    static final String DEFAULT_MODULE = "java_tracing";
+    static final String DEFAULT_FUNCTION = "unspecified";
+
+    private static long nextUniqueNumber = 0;
+    private static synchronized long getUniqueNumber() {
+        return nextUniqueNumber++;
+    }
+
+    protected ProbeSkeleton createProbe(Method m) {
+        return new DTraceProbe(proxy, m);
+    }
+
+    DTraceProvider(Class<? extends Provider> type) {
+        super(type);
+    }
+
+    void setProxy(Object p) {
+        proxy = p;
+    }
+
+    void setActivation(Activation a) {
+        this.activation = a;
+    }
+
+    public void dispose() {
+        if (activation != null) {
+            activation.disposeProvider(this);
+            activation = null;
+        }
+        super.dispose();
+    }
+
+    /**
+     * Magic routine which creates an implementation of the user's interface.
+     *
+     * This method uses the ProxyGenerator directly to bypass the
+     * java.lang.reflect.proxy cache so that we get a unique class each
+     * time it's called and can't accidently reuse a $Proxy class.
+     *
+     * @return an implementation of the user's interface
+     */
+    @SuppressWarnings("unchecked")
+    public <T extends Provider> T newProxyInstance() {
+        /*
+         * Choose a name for the proxy class to generate.
+         */
+        long num = getUniqueNumber();
+
+        String proxyPkg = "";
+        if (!Modifier.isPublic(providerType.getModifiers())) {
+            String name = providerType.getName();
+            int n = name.lastIndexOf('.');
+            proxyPkg = ((n == -1) ? "" : name.substring(0, n + 1));
+        }
+
+        String proxyName = proxyPkg + proxyClassNamePrefix + num;
+
+        /*
+         * Generate the specified proxy class.
+         */
+        Class<?> proxyClass = null;
+        byte[] proxyClassFile = ProxyGenerator.generateProxyClass(
+                proxyName, new Class<?>[] { providerType });
+        try {
+            proxyClass = JVM.defineClass(
+                providerType.getClassLoader(), proxyName,
+                proxyClassFile, 0, proxyClassFile.length);
+        } catch (ClassFormatError e) {
+            /*
+             * A ClassFormatError here means that (barring bugs in the
+             * proxy class generation code) there was some other
+             * invalid aspect of the arguments supplied to the proxy
+             * class creation (such as virtual machine limitations
+             * exceeded).
+             */
+            throw new IllegalArgumentException(e.toString());
+        }
+
+        /*
+         * Invoke its constructor with the designated invocation handler.
+         */
+        try {
+            Constructor cons = proxyClass.getConstructor(constructorParams);
+            return (T)cons.newInstance(new Object[] { this });
+        } catch (NoSuchMethodException e) {
+            throw new InternalError(e.toString());
+        } catch (IllegalAccessException e) {
+            throw new InternalError(e.toString());
+        } catch (InstantiationException e) {
+            throw new InternalError(e.toString());
+        } catch (InvocationTargetException e) {
+            throw new InternalError(e.toString());
+        }
+    }
+
+    // In the normal case, the proxy object's method implementations will call
+    // this method (it usually calls the ProviderSkeleton's version).  That
+    // method uses the passed 'method' object to lookup the associated
+    // 'ProbeSkeleton' and calls uncheckedTrigger() on that probe to cause the
+    // probe to fire.  DTrace probes are different in that the proxy class's
+    // methods are immediately overridden with native code to fire the probe
+    // directly.  So this method should never get invoked.  We also wire up the
+    // DTraceProbe.uncheckedTrigger() method to call the proxy method instead
+    // of doing the work itself.
+    public Object invoke(Object proxy, Method method, Object[] args) {
+        if (method.getDeclaringClass() != providerType) {
+            try {
+                return method.invoke(this, args);
+            } catch (IllegalAccessException e) {
+                assert false;
+            } catch (InvocationTargetException e) {
+                assert false;
+            }
+        } else if (active) {
+            assert false : "This method should have been overridden by the JVM";
+        }
+        return null;
+    }
+
+    public String getProviderName() {
+        return super.getProviderName();
+    }
+
+    String getModuleName() {
+        return getAnnotationString(
+            providerType, ModuleName.class, DEFAULT_MODULE);
+    }
+
+    static String getProbeName(Method method) {
+        return getAnnotationString(
+            method, ProbeName.class, method.getName());
+    }
+
+    static String getFunctionName(Method method) {
+        return getAnnotationString(
+            method, FunctionName.class, DEFAULT_FUNCTION);
+    }
+
+    DTraceProbe[] getProbes() {
+        return probes.values().toArray(new DTraceProbe[0]);
+    }
+
+    StabilityLevel getNameStabilityFor(Class<? extends Annotation> type) {
+        Attributes attrs = (Attributes)getAnnotationValue(
+            providerType, type, "value", null);
+        if (attrs == null) {
+            return StabilityLevel.PRIVATE;
+        } else {
+            return attrs.name();
+        }
+    }
+
+    StabilityLevel getDataStabilityFor(Class<? extends Annotation> type) {
+        Attributes attrs = (Attributes)getAnnotationValue(
+            providerType, type, "value", null);
+        if (attrs == null) {
+            return StabilityLevel.PRIVATE;
+        } else {
+            return attrs.data();
+        }
+    }
+
+    DependencyClass getDependencyClassFor(Class<? extends Annotation> type) {
+        Attributes attrs = (Attributes)getAnnotationValue(
+            providerType, type, "value", null);
+        if (attrs == null) {
+            return DependencyClass.UNKNOWN;
+        } else {
+            return attrs.dependency();
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/dtrace/DTraceProviderFactory.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing.dtrace;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.logging.Logger;
+import java.security.Permission;
+
+import com.sun.tracing.ProviderFactory;
+import com.sun.tracing.Provider;
+
+/**
+ * Factory class to create JSDT Providers.
+ *
+ * This class contains methods to create an instance of a Provider
+ * interface which can be used to place tracepoints in an application.
+ * Method calls upon that instance trigger DTrace probes that
+ * are visible from DTrace scripts.   Such calls have no other
+ * side effects in the application.
+ * <p>
+ * The DTrace script mechanisms for listing and matching probes will not see
+ * nor match any probes until the provider they reside in is created by a
+ * call to {@code createProvider()} (or {@code createProviders()}).
+ * <p>
+ * Providers that are created should be disposed of when they are no longer
+ * needed to free up system resources, at which point the associated
+ * DTrace probes will no longer be available to DTrace.  One disposes a
+ * provider by calling
+ * {@link com.sun.tracing.Provider#dispose Provider.dispose()} on a
+ * created provider instance.
+ *
+ * @since 1.7
+ */
+public final class DTraceProviderFactory extends ProviderFactory {
+    /**
+     * Creates an instance of a provider which can then be used to trigger
+     * DTrace probes.
+     *
+     * The provider specification, provided as an argument, should only
+     * contain methods which have a 'void' return type and String or
+     * integer-based typed arguments (long, int, short, char, byte, or boolean).
+     *
+     * @param cls A user-defined interface which extends {@code Provider}.
+     * @return An instance of the interface which is used to trigger
+     * the DTrace probes.
+     * @throws java.lang.SecurityException if a security manager has been
+     * installed and it denies
+     * RuntimePermission("com.sun.dtrace.jsdt.createProvider")
+     * @throws java.lang.IllegalArgumentException if the interface contains
+     * methods that do not return null, or that contain arguments that are
+     * not String or integer types.
+     */
+    public <T extends Provider> T createProvider(Class<T> cls) {
+        DTraceProvider jsdt = new DTraceProvider(cls);
+        T proxy = jsdt.newProxyInstance();
+        jsdt.setProxy(proxy);
+        try {
+            jsdt.init();
+            new Activation(jsdt.getModuleName(), new DTraceProvider[] { jsdt });
+        } catch (Exception e) {
+            // Probably a permission problem (can't get declared members)
+            Logger.getAnonymousLogger().warning(
+                "Could not initialize tracing provider: " + e.getMessage());
+            jsdt.dispose();
+        }
+        return proxy;
+    }
+
+    /**
+     * Creates multiple providers at once.
+     *
+     * This method batches together a number of provider instantiations.
+     * It works similarly
+     * to {@code createProvider}, but operates on a set of providers instead
+     * of one at a time.  This method is in place since some DTrace
+     * implementations limit the number of times that providers can be
+     * created.  When numerous providers can be created at once with this
+     * method, it will count only as a single creation point to DTrace, thus
+     * it uses less system resources.
+     * <p>
+     * All of the probes in the providers will be visible to DTrace after
+     * this call and all will remain visible until all of the providers
+     * are disposed.
+     * <p>
+     * The {@code moduleName} parameter will override any {@code ModuleName}
+     * annotation associated with any of the providers in the set.
+     * All of the probes created by this call will share the same
+     * module name.
+     * <p>
+     * @param providers a set of provider specification interfaces
+     * @param moduleName the module name to associate with all probes
+     * @return A map which maps the provider interface specification to an
+     * implementing instance.
+     * @throws java.lang.SecurityException if a security manager has been
+     * installed and it denies
+     * RuntimePermission("com.sun.dtrace.jsdt.createProvider")
+     * @throws java.lang.IllegalArgumentException if any of the interface
+     * contains methods that do not return null, or that contain arguments
+     * that are not String or integer types.
+     */
+    public Map<Class<? extends Provider>,Provider> createProviders(
+            Set<Class<? extends Provider>> providers, String moduleName) {
+        HashMap<Class<? extends Provider>,Provider> map =
+            new HashMap<Class<? extends Provider>,Provider>();
+        HashSet<DTraceProvider> jsdts = new HashSet<DTraceProvider>();
+        for (Class<? extends Provider> cls : providers) {
+            DTraceProvider jsdt = new DTraceProvider(cls);
+            jsdts.add(jsdt);
+            map.put(cls, jsdt.newProxyInstance());
+        }
+        new Activation(moduleName, jsdts.toArray(new DTraceProvider[0]));
+        return map;
+    }
+
+    /**
+     * Used to check the status of DTrace support in the underlying JVM and
+     * operating system.
+     *
+     * This is an informative method only - the Java-level effects of
+     * creating providers and triggering probes will not change whether or
+     * not DTrace is supported by the underlying systems.
+     *
+     * @return true if DTrace is supported
+     */
+    public static boolean isSupported() {
+        try {
+            SecurityManager security = System.getSecurityManager();
+            if (security != null) {
+                Permission perm = new RuntimePermission(
+                        "com.sun.tracing.dtrace.createProvider");
+                security.checkPermission(perm);
+            }
+            return JVM.isSupported();
+        } catch (SecurityException e) {
+            return false;
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/dtrace/JVM.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+package sun.tracing.dtrace;
+
+import java.lang.reflect.Method;
+
+/**
+ * Container class for JVM interface native methods
+ *
+ * @since 1.7
+ */
+class JVM {
+
+    static {
+      java.security.AccessController.doPrivileged(
+              new sun.security.action.LoadLibraryAction("jsdt"));
+    }
+
+    static long activate(String moduleName, DTraceProvider[] providers) {
+        return activate0(moduleName, providers);
+    }
+
+    static void dispose(long handle) {
+        dispose0(handle);
+    }
+
+    static boolean isEnabled(Method m) {
+        return isEnabled0(m);
+    }
+
+    static boolean isSupported() {
+        return isSupported0();
+    }
+
+    static Class<?> defineClass(
+            ClassLoader loader, String name, byte[] b, int off, int len) {
+        return defineClass0(loader, name, b, off, len);
+    }
+
+    private static native long activate0(
+        String moduleName, DTraceProvider[] providers);
+    private static native void dispose0(long activation_handle);
+    private static native boolean isEnabled0(Method m);
+    private static native boolean isSupported0();
+    private static native Class<?> defineClass0(
+        ClassLoader loader, String name, byte[] b, int off, int len);
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/sun/tracing/package-info.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+/**
+ * This package contains internal common code for implementing tracing
+ * frameworks, and defined a number of existing frameworks.
+ * <p>
+ * There are four tracing frameworks currently defined.  The "Null" and
+ * "Multiplex" frameworks are used internally as part of the implementation.
+ * The "DTrace" framework is the prime consumer framework at the moment,
+ * while the "PrintStream" framework is a functional, but hidden, framework
+ * which can be used to track probe firings.  All but the "DTrace" framework
+ * are defined in this package.  The "DTrace" framework is implemented in the
+ * {@code sun.tracing.dtrace} package.
+ * <p>
+ * This package also contains the {@code ProviderSkeleton} class, which
+ * holds most of the common code needed for implementing frameworks.
+ * <p>
+ * The "Null" framework is used when there are no other active frameworks.
+ * It accomplishes absolutely nothing and is merely a placeholder so that
+ * the application can call the tracing routines without error.
+ * <p>
+ * The "Multiplex" framework is used when there are multiple active frameworks.
+ * It is initialized with the framework factories and create providers and
+ * probes that dispatch to each active framework in turn.
+ * <p>
+ * The "PrintStream" framework is currently a debugging framework which
+ * dispatches trace calls to a user-defined PrintStream class, defined by
+ * a property.  It may some day be opened up to general use.
+ * <p>
+ * See the {@code sun.tracing.dtrace} and {@code com.sun.tracing.dtrace}
+ * packages for information on the "DTrace" framework.
+ */
+
+package sun.tracing;
--- a/src/share/javavm/export/jvm.h	Tue Apr 15 17:46:47 2008 -0700
+++ b/src/share/javavm/export/jvm.h	Thu Apr 17 22:00:16 2008 -0400
@@ -591,6 +591,80 @@
 JNIEXPORT jboolean JNICALL
 JVM_SupportsCX8(void);
 
+/*
+ * com.sun.dtrace.jsdt support
+ */
+
+#define JVM_TRACING_DTRACE_VERSION 1
+
+/*
+ * Structure to pass one probe description to JVM
+ */
+typedef struct {
+    jmethodID method;
+    jstring   function;
+    jstring   name;
+    void*            reserved[4];     // for future use
+} JVM_DTraceProbe;
+
+/**
+ * Encapsulates the stability ratings for a DTrace provider field
+ */
+typedef struct {
+    jint nameStability;
+    jint dataStability;
+    jint dependencyClass;
+} JVM_DTraceInterfaceAttributes;
+
+/*
+ * Structure to pass one provider description to JVM
+ */
+typedef struct {
+    jstring                       name;
+    JVM_DTraceProbe*              probes;
+    jint                          probe_count;
+    JVM_DTraceInterfaceAttributes providerAttributes;
+    JVM_DTraceInterfaceAttributes moduleAttributes;
+    JVM_DTraceInterfaceAttributes functionAttributes;
+    JVM_DTraceInterfaceAttributes nameAttributes;
+    JVM_DTraceInterfaceAttributes argsAttributes;
+    void*                         reserved[4]; // for future use
+} JVM_DTraceProvider;
+
+/*
+ * Get the version number the JVM was built with
+ */
+JNIEXPORT jint JNICALL
+JVM_DTraceGetVersion(JNIEnv* env);
+
+/*
+ * Register new probe with given signature, return global handle
+ *
+ * The version passed in is the version that the library code was
+ * built with.
+ */
+JNIEXPORT jlong JNICALL
+JVM_DTraceActivate(JNIEnv* env, jint version, jstring module_name,
+  jint providers_count, JVM_DTraceProvider* providers);
+
+/*
+ * Check JSDT probe
+ */
+JNIEXPORT jboolean JNICALL
+JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method);
+
+/*
+ * Destroy custom DOF
+ */
+JNIEXPORT void JNICALL
+JVM_DTraceDispose(JNIEnv* env, jlong activation_handle);
+
+/*
+ * Check to see if DTrace is supported by OS
+ */
+JNIEXPORT jboolean JNICALL
+JVM_DTraceIsSupported(JNIEnv* env);
+
 /*************************************************************************
  PART 2: Support for the Verifier and Class File Format Checker
  ************************************************************************/
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/native/sun/tracing/dtrace/JVM.c	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,304 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+#include <stdlib.h>
+
+#include "jvm.h"
+#include "jni.h"
+#include "jni_util.h"
+
+#include "jvm_symbols.h"
+#include "sun_tracing_dtrace_JVM.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static JvmSymbols* jvm_symbols = NULL;
+
+static void initialize() {
+    static int initialized = 0;
+    if (initialized == 0) {
+        jvm_symbols = lookupJvmSymbols();
+        initialized = 1;
+    }
+}
+
+/*
+ * Class:     sun_tracing_dtrace_JVM
+ * Method:    isSupported0
+ * Signature: ()I
+ */
+JNIEXPORT jboolean JNICALL Java_sun_tracing_dtrace_JVM_isSupported0(
+        JNIEnv* env, jclass cls) {
+    initialize();
+    if (jvm_symbols != NULL) {
+        return jvm_symbols->IsSupported(env) ? JNI_TRUE : JNI_FALSE;
+    } else {
+        return JNI_FALSE;
+    }
+}
+
+// Macros that cause an immediate return if we detect an exception
+#define CHECK if ((*env)->ExceptionOccurred(env)) { return; }
+#define CHECK_(x) if ((*env)->ExceptionOccurred(env)) { return x; }
+
+static void readProbeData (
+        JNIEnv* env, jobject probe, JVM_DTraceProbe* jvm_probe) {
+    jclass clazz;
+    jmethodID mid;
+    jobject method;
+
+    if (jvm_probe == NULL) {
+        return; // just in case
+    }
+
+    clazz = (*env)->GetObjectClass(env, probe); CHECK
+
+    mid = (*env)->GetMethodID(
+        env, clazz, "getFunctionName", "()Ljava/lang/String;"); CHECK
+    jvm_probe->function = (jstring)(*env)->CallObjectMethod(
+        env, probe, mid); CHECK
+
+    mid = (*env)->GetMethodID(
+        env, clazz, "getProbeName", "()Ljava/lang/String;"); CHECK
+    jvm_probe->name = (jstring)(*env)->CallObjectMethod(env, probe, mid); CHECK
+
+    mid = (*env)->GetMethodID(
+        env, clazz, "getMethod", "()Ljava/lang/reflect/Method;"); CHECK
+    method = (*env)->CallObjectMethod(env, probe, mid); CHECK
+    jvm_probe->method = (*env)->FromReflectedMethod(env, method); CHECK
+}
+
+static void readFieldInterfaceAttributes(
+        char* annotationName, JNIEnv* env, jobject provider,
+        JVM_DTraceInterfaceAttributes* attrs) {
+    jobject result;
+    jobject result_clazz;
+    jclass provider_clazz;
+    jclass annotation_clazz;
+    jmethodID get;
+    jmethodID enc;
+
+    provider_clazz = (*env)->GetObjectClass(env, provider); CHECK
+    annotation_clazz = (*env)->FindClass(env, annotationName); CHECK
+
+    get = (*env)->GetMethodID(env, provider_clazz, "getNameStabilityFor",
+        "(Ljava/lang/Class;)Lcom/sun/tracing/dtrace/StabilityLevel;"); CHECK
+    result = (*env)->CallObjectMethod(
+        env, provider, get, annotation_clazz); CHECK
+    result_clazz = (*env)->GetObjectClass(env, result); CHECK
+    enc = (*env)->GetMethodID(env, result_clazz, "getEncoding", "()I"); CHECK
+    attrs->nameStability = (*env)->CallIntMethod(env, result, enc); CHECK
+
+    get = (*env)->GetMethodID(env, provider_clazz, "getDataStabilityFor",
+        "(Ljava/lang/Class;)Lcom/sun/tracing/dtrace/StabilityLevel;"); CHECK
+    result = (*env)->CallObjectMethod(
+        env, provider, get, annotation_clazz); CHECK
+    result_clazz = (*env)->GetObjectClass(env, result); CHECK
+    enc = (*env)->GetMethodID(env, result_clazz, "getEncoding", "()I"); CHECK
+    attrs->dataStability = (*env)->CallIntMethod(env, result, enc); CHECK
+
+    get = (*env)->GetMethodID(env, provider_clazz, "getDependencyClassFor",
+        "(Ljava/lang/Class;)Lcom/sun/tracing/dtrace/DependencyClass;"); CHECK
+    result = (*env)->CallObjectMethod(
+        env, provider, get, annotation_clazz); CHECK
+    result_clazz = (*env)->GetObjectClass(env, result); CHECK
+    enc = (*env)->GetMethodID(env, result_clazz, "getEncoding", "()I"); CHECK
+    attrs->dependencyClass = (*env)->CallIntMethod(env, result, enc); CHECK
+}
+
+static void readInterfaceAttributes(
+        JNIEnv* env, jobject provider, JVM_DTraceProvider* jvm_provider) {
+    readFieldInterfaceAttributes("com/sun/tracing/dtrace/ProviderAttributes",
+        env, provider, &(jvm_provider->providerAttributes));
+    readFieldInterfaceAttributes("com/sun/tracing/dtrace/ModuleAttributes",
+        env, provider, &(jvm_provider->moduleAttributes));
+    readFieldInterfaceAttributes("com/sun/tracing/dtrace/FunctionAttributes",
+        env, provider, &(jvm_provider->functionAttributes));
+    readFieldInterfaceAttributes("com/sun/tracing/dtrace/NameAttributes",
+        env, provider, &(jvm_provider->nameAttributes));
+    readFieldInterfaceAttributes("com/sun/tracing/dtrace/ArgsAttributes",
+        env, provider, &(jvm_provider->argsAttributes));
+}
+
+static void readProviderData(
+        JNIEnv* env, jobject provider, JVM_DTraceProvider* jvm_provider) {
+    jmethodID mid;
+    jobjectArray probes;
+    jsize i;
+    jclass clazz = (*env)->GetObjectClass(env, provider); CHECK
+    mid = (*env)->GetMethodID(
+        env, clazz, "getProbes", "()[Lsun/tracing/dtrace/DTraceProbe;"); CHECK
+    probes = (jobjectArray)(*env)->CallObjectMethod(
+        env, provider, mid); CHECK
+
+    // Fill JVM structure, describing provider
+    jvm_provider->probe_count = (*env)->GetArrayLength(env, probes); CHECK
+    jvm_provider->probes = (JVM_DTraceProbe*)calloc(
+        jvm_provider->probe_count, sizeof(*jvm_provider->probes));
+    mid = (*env)->GetMethodID(
+        env, clazz, "getProviderName", "()Ljava/lang/String;"); CHECK
+    jvm_provider->name = (jstring)(*env)->CallObjectMethod(
+        env, provider, mid); CHECK
+
+    readInterfaceAttributes(env, provider, jvm_provider); CHECK
+
+    for (i = 0; i < jvm_provider->probe_count; ++i) {
+        jobject probe = (*env)->GetObjectArrayElement(env, probes, i); CHECK
+        readProbeData(env, probe, &jvm_provider->probes[i]); CHECK
+    }
+}
+
+/*
+ * Class:     sun_tracing_dtrace_JVM
+ * Method:    activate0
+ * Signature: ()J
+ */
+JNIEXPORT jlong JNICALL Java_sun_tracing_dtrace_JVM_activate0(
+        JNIEnv* env, jclass cls, jstring moduleName, jobjectArray providers) {
+    jlong handle = 0;
+    jsize num_providers;
+    jsize i;
+    JVM_DTraceProvider* jvm_providers;
+
+    initialize();
+
+    if (jvm_symbols == NULL) {
+      return 0;
+    }
+
+    num_providers = (*env)->GetArrayLength(env, providers); CHECK_(0L)
+
+    jvm_providers = (JVM_DTraceProvider*)calloc(
+        num_providers, sizeof(*jvm_providers));
+
+    for (i = 0; i < num_providers; ++i) {
+        JVM_DTraceProvider* p = &(jvm_providers[i]);
+        jobject provider = (*env)->GetObjectArrayElement(
+            env, providers, i);
+        readProviderData(env, provider, p);
+    }
+
+    handle = jvm_symbols->Activate(
+        env, JVM_TRACING_DTRACE_VERSION, moduleName,
+        num_providers, jvm_providers);
+
+    for (i = 0; i < num_providers; ++i) {
+        JVM_DTraceProvider* p = &(jvm_providers[i]);
+        free(p->probes);
+    }
+    free(jvm_providers);
+
+    return handle;
+}
+
+/*
+ * Class:     sun_tracing_dtrace_JVM
+ * Method:    dispose0
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_sun_tracing_dtrace_JVM_dispose0(
+        JNIEnv* env, jclass cls, jlong handle) {
+    if (jvm_symbols != NULL && handle != 0) {
+        jvm_symbols->Dispose(env, handle);
+    }
+}
+
+/*
+ * Class:     sun_tracing_dtrace_JVM
+ * Method:    isEnabled0
+ * Signature: (Ljava/lang/String;Ljava/lang/String;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_sun_tracing_dtrace_JVM_isEnabled0(
+        JNIEnv* env, jclass cls, jobject method) {
+    jmethodID mid;
+    if (jvm_symbols != NULL && method != NULL) {
+        mid = (*env)->FromReflectedMethod(env, method);
+        return jvm_symbols->IsProbeEnabled(env, mid);
+    }
+    return JNI_FALSE;
+}
+
+/*
+ * Class:     sun_tracing_dtrace_JVM
+ * Method:    defineClass0
+ * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BII)Ljava/lang/Class;
+ *
+ * The implementation of this native static method is a copy of that of
+ * the native instance method Java_java_lang_ClassLoader_defineClass0()
+ * with the implicit "this" parameter becoming the "loader" parameter.
+ *
+ * This code was cloned and modified from java_lang_reflect_Proxy
+ */
+JNIEXPORT jclass JNICALL
+Java_sun_tracing_dtrace_JVM_defineClass0(
+        JNIEnv *env, jclass ignore, jobject loader, jstring name, jbyteArray data,
+        jint offset, jint length)
+{
+    jbyte *body;
+    char *utfName;
+    jclass result = 0;
+    char buf[128];
+
+    if (data == NULL) {
+        return 0;
+    }
+
+    /* Work around 4153825. malloc crashes on Solaris when passed a
+     * negative size.
+     */
+    if (length < 0) {
+        return 0;
+    }
+
+    body = (jbyte *)malloc(length);
+
+    if (body == 0) {
+        return 0;
+    }
+
+    (*env)->GetByteArrayRegion(env, data, offset, length, body);
+
+    if ((*env)->ExceptionOccurred(env))
+        goto free_body;
+
+    if (name != NULL) {
+        int i;
+        int len = (*env)->GetStringUTFLength(env, name);
+        int unicode_len = (*env)->GetStringLength(env, name);
+        if (len >= sizeof(buf)) {
+            utfName = malloc(len + 1);
+            if (utfName == NULL) {
+                goto free_body;
+            }
+        } else {
+            utfName = buf;
+        }
+        (*env)->GetStringUTFRegion(env, name, 0, unicode_len, utfName);
+
+        // Convert '.' to '/' in the package name
+        for (i = 0; i < unicode_len; ++i) {
+            if (utfName[i] == '.') {
+                utfName[i] = '/';
+            }
+        }
+    } else {
+        utfName = NULL;
+    }
+
+    result = (*env)->DefineClass(env, utfName, loader, body, length);
+
+    if (utfName && utfName != buf)
+        free(utfName);
+
+ free_body:
+    free(body);
+    return result;
+}
+
+#ifdef __cplusplus
+}
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/native/sun/tracing/dtrace/jvm_symbols.h	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+#ifndef _JVM_SYMBOLS_H
+#define _JVM_SYMBOLS_H
+
+#include "jvm.h"
+
+typedef jint (JNICALL* GetVersion_t)(JNIEnv*);
+typedef jboolean (JNICALL *IsSupported_t)(JNIEnv*);
+typedef jlong (JNICALL* Activate_t)(
+    JNIEnv*, jint, jstring, jint, JVM_DTraceProvider*);
+typedef void (JNICALL *Dispose_t)(JNIEnv*, jlong);
+typedef jboolean (JNICALL *IsProbeEnabled_t)(JNIEnv*, jmethodID);
+
+typedef struct {
+    GetVersion_t     GetVersion;
+    IsSupported_t    IsSupported;
+    Activate_t       Activate;
+    Dispose_t        Dispose;
+    IsProbeEnabled_t IsProbeEnabled;
+} JvmSymbols;
+
+// Platform-dependent implementation.
+// Returns NULL if the symbols are not found
+extern JvmSymbols* lookupJvmSymbols();
+
+#endif // def _JVM_SYMBOLS_H
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/solaris/native/sun/tracing/dtrace/jvm_symbols_md.c	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+#include <dlfcn.h>
+#include <stdlib.h>
+
+#include <jvm.h>
+
+#include "jvm_symbols.h"
+
+JvmSymbols* lookupJvmSymbols() {
+    JvmSymbols* syms = (JvmSymbols*)malloc(sizeof(JvmSymbols));
+    if (syms != NULL) {
+        syms->GetVersion = (GetVersion_t)
+            dlsym(RTLD_DEFAULT, "JVM_DTraceGetVersion");
+        syms->IsSupported = (IsSupported_t)
+            dlsym(RTLD_DEFAULT, "JVM_DTraceIsSupported");
+        syms->Activate = (Activate_t)
+            dlsym(RTLD_DEFAULT, "JVM_DTraceActivate");
+        syms->Dispose = (Dispose_t)
+            dlsym(RTLD_DEFAULT, "JVM_DTraceDispose");
+        syms->IsProbeEnabled = (IsProbeEnabled_t)
+            dlsym(RTLD_DEFAULT, "JVM_DTraceIsProbeEnabled");
+
+        if ( syms->GetVersion == NULL || syms->Activate == NULL ||
+             syms->IsProbeEnabled == NULL || syms->Dispose == NULL ||
+             syms->IsSupported == NULL) {
+            free(syms);
+            syms = NULL;
+        }
+    }
+    return syms;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/windows/native/sun/tracing/dtrace/jvm_symbols_md.c	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+#include <windows.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <jvm.h>
+
+#include "jvm_symbols.h"
+
+JvmSymbols* lookupJvmSymbols() {
+    JvmSymbols* syms = (JvmSymbols*)malloc(sizeof(JvmSymbols));
+    if (syms != NULL) {
+        HINSTANCE jvm = LoadLibrary("jvm.dll");
+        if (jvm == NULL) {
+            free(syms);
+            return NULL;
+        }
+        syms->GetVersion = (GetVersion_t)
+            GetProcAddress(jvm, "JVM_DTraceGetVersion");
+        syms->IsSupported = (IsSupported_t)
+            GetProcAddress(jvm, "JVM_DTraceIsSupported");
+        syms->Activate = (Activate_t)
+            GetProcAddress(jvm, "JVM_DTraceActivate");
+        syms->Dispose = (Dispose_t)
+            GetProcAddress(jvm, "JVM_DTraceDispose");
+        syms->IsProbeEnabled = (IsProbeEnabled_t)
+            GetProcAddress(jvm, "JVM_DTraceIsProbeEnabled");
+
+        (void)FreeLibrary(jvm);
+        if ( syms->GetVersion == NULL || syms->IsSupported == NULL ||
+             syms->Activate == NULL || syms->Dispose == NULL ||
+             syms->IsProbeEnabled == NULL) {
+            free(syms);
+            syms = NULL;
+        }
+
+    }
+    return syms;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/com/sun/tracing/BasicFunctionality.java	Thu Apr 17 22:00:16 2008 -0400
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 6537506
+ * @summary Basic unit test for tracing framework
+ */
+
+import com.sun.tracing.*;
+import java.lang.reflect.Method;
+
+@ProviderName("NamedProvider")
+interface BasicProvider extends Provider {
+    void plainProbe();
+    void probeWithArgs(int a, float f, String s, Long l);
+    @ProbeName("namedProbe") void probeWithName();
+    void overloadedProbe();
+    void overloadedProbe(int i);
+}
+
+interface InvalidProvider extends Provider {
+    int nonVoidProbe();
+}
+
+public class BasicFunctionality {
+
+    public static ProviderFactory factory;
+    public static BasicProvider bp;
+
+    public static void main(String[] args) throws Exception {
+
+        factory = ProviderFactory.getDefaultFactory();
+        if (factory != null) {
+            bp = factory.createProvider(BasicProvider.class);
+        }
+
+        testProviderFactory();
+        testProbe();
+        testProvider();
+    }
+
+    static void fail(String s) throws Exception {
+        throw new Exception(s);
+    }
+
+    static void testProviderFactory() throws Exception {
+        if (factory == null) {
+            fail("ProviderFactory.getDefaultFactory: Did not create factory");
+        }
+        if (bp == null) {
+            fail("ProviderFactory.createProvider: Did not create provider");
+        }
+        try {
+            factory.createProvider(null);
+            fail("ProviderFactory.createProvider: Did not throw NPE for null");
+        } catch (NullPointerException e) {}
+
+       try {
+           factory.createProvider(InvalidProvider.class);
+           fail("Factory.createProvider: Should error with non-void probes");
+       } catch (IllegalArgumentException e) {}
+    }
+
+    public static void testProvider() throws Exception {
+
+       // These just shouldn't throw any exeptions:
+       bp.plainProbe();
+       bp.probeWithArgs(42, (float)3.14, "spam", new Long(2L));
+       bp.probeWithArgs(42, (float)3.14, null, null);
+       bp.probeWithName();
+       bp.overloadedProbe();
+       bp.overloadedProbe(42);
+
+       Method m = BasicProvider.class.getMethod("plainProbe");
+       Probe p = bp.getProbe(m);
+       if (p == null) {
+           fail("Provider.getProbe: Did not return probe");
+       }
+
+       Method m2 = BasicFunctionality.class.getMethod("testProvider");
+       p = bp.getProbe(m2);
+       if (p != null) {
+           fail("Provider.getProbe: Got probe with invalid spec");
+       }
+
+       bp.dispose();
+       // These just shouldn't throw any exeptions:
+       bp.plainProbe();
+       bp.probeWithArgs(42, (float)3.14, "spam", new Long(2L));
+       bp.probeWithArgs(42, (float)3.14, null, null);
+       bp.probeWithName();
+       bp.overloadedProbe();
+       bp.overloadedProbe(42);
+
+       if (bp.getProbe(m) != null) {
+           fail("Provider.getProbe: Should return null after dispose()");
+       }
+
+       bp.dispose(); // just to make sure nothing bad happens
+    }
+
+    static void testProbe() throws Exception {
+       Method m = BasicProvider.class.getMethod("plainProbe");
+       Probe p = bp.getProbe(m);
+       p.isEnabled(); // just make sure it doesn't do anything bad
+       p.trigger();
+
+       try {
+         p.trigger(0);
+         fail("Probe.trigger: too many arguments not caught");
+       } catch (IllegalArgumentException e) {}
+
+       p = bp.getProbe(BasicProvider.class.getMethod(
+           "probeWithArgs", int.class, float.class, String.class, Long.class));
+       try {
+         p.trigger();
+         fail("Probe.trigger: too few arguments not caught");
+       } catch (IllegalArgumentException e) {}
+
+       try {
+         p.trigger((float)3.14, (float)3.14, "", new Long(0L));
+         fail("Probe.trigger: wrong type primitive arguments not caught");
+       } catch (IllegalArgumentException e) {}
+    }
+}