2 files changed, 111 insertions, 0 deletions
diff --git a/java/lang/management/CompilationMXBean.java b/java/lang/management/CompilationMXBean.java
new file mode 100644
index 000000000..7f666f2c6
--- /dev/null
+++ b/java/lang/management/CompilationMXBean.java
@@ -0,0 +1,85 @@
+/* CompilationMXBean.java - Interface for a compilation bean
+   Copyright (C) 2006 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.lang.management;
+
+/**
+ * Provides access to information about the Just-In-Time
+ * (JIT) compiler provided by the virtual machine, if one
+ * exists.  An instance of this bean is obtainable by
+ * calling {@link ManagementFactory#getCompilationMXBean()}
+ * if a JIT is available.  Otherwise, the method returns
+ * <code>null</code>.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+public interface CompilationMXBean
+{
+  
+  /**
+   * Returns the name of the Just-In-Time (JIT) compiler.
+   *
+   * @return the name of the JIT compiler.
+   */
+  String getName();
+
+  /**
+   * Returns true if the virtual machine's JIT compiler
+   * supports monitoring of the time spent compiling.
+   *
+   * @return true if the JIT compiler can be monitored
+   *         for time spent compiling.
+   */
+  boolean isCompilationTimeMonitoringSupported();
+
+  /**
+   * Returns the accumulated time, in milliseconds, that
+   * the JIT compiler has spent compiling Java bytecodes
+   * to native machine code.  This value represents a single
+   * time measurement for the whole virtual machine, including
+   * all multiple threads of operation.  The value is not
+   * intended as a performance measurement.
+   *
+   * @return the accumulated number of milliseconds the JIT
+   *         compiler has spent compiling.
+   * @throws UnsupportedOperationException if time monitoring
+   *                                       is not supported.
+   */
+  long getTotalCompilationTime();
+
+}
diff --git a/java/lang/management/ManagementFactory.java b/java/lang/management/ManagementFactory.java
index 915ca50c1..6e8010089 100644
--- a/java/lang/management/ManagementFactory.java
+++ b/java/lang/management/ManagementFactory.java
@@ -37,7 +37,10 @@ exception statement from your version. */
 
 package java.lang.management;
 
+import gnu.classpath.SystemProperties;
+
 import gnu.java.lang.management.ClassLoadingMXBeanImpl;
+import gnu.java.lang.management.CompilationMXBeanImpl;
 import gnu.java.lang.management.OperatingSystemMXBeanImpl;
 import gnu.java.lang.management.MemoryMXBeanImpl;
 import gnu.java.lang.management.RuntimeMXBeanImpl;
@@ -89,6 +92,11 @@ public class ManagementFactory
   private static MemoryMXBean memoryBean;
 
   /**
+   * The compilation bean (may remain null).
+   */
+  private static CompilationMXBean compilationBean;
+
+  /**
    * Private constructor to prevent instance creation.
    */
   private ManagementFactory() {}
@@ -163,4 +171,22 @@ public class ManagementFactory
     return memoryBean;
   }
 
+  /**
+   * Returns the compilation bean for the running
+   * virtual machine, if supported.  Otherwise,
+   * it returns <code>null</code>.
+   *
+   * @return an instance of {@link CompilationMXBean} for
+   *         this virtual machine, or <code>null</code>
+   *         if the virtual machine doesn't include
+   *         a Just-In-Time (JIT) compiler.
+   */
+  public static CompilationMXBean getCompilationMXBean()
+  {
+    if (compilationBean == null &&
+	SystemProperties.getProperty("gnu.java.compiler.name") != null)
+      compilationBean = new CompilationMXBeanImpl();
+    return compilationBean;
+  }
+
 }