--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/services/heapDumper.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2005-2007 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.
+ *
+ */
+
+// HeapDumper is used to dump the java heap to file in HPROF binary format:
+//
+//  { HeapDumper dumper(true /* full GC before heap dump */);
+//    if (dumper.dump("/export/java.hprof")) {
+//      ResourceMark rm;
+//      tty->print_cr("Dump failed: %s", dumper.error_as_C_string());
+//    } else {
+//      // dump succeeded
+//    }
+//  }
+//
+
+class HeapDumper : public StackObj {
+ private:
+  char* _error;
+  bool _print_to_tty;
+  bool _gc_before_heap_dump;
+  elapsedTimer _t;
+
+  // string representation of error
+  char* error() const                   { return _error; }
+  void set_error(char* error);
+
+  // indicates if progress messages can be sent to tty
+  bool print_to_tty() const             { return _print_to_tty; }
+
+  // internal timer.
+  elapsedTimer* timer()                 { return &_t; }
+
+ public:
+  HeapDumper(bool gc_before_heap_dump) :
+    _gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(false)  { }
+  HeapDumper(bool gc_before_heap_dump, bool print_to_tty) :
+    _gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(print_to_tty) { }
+
+  ~HeapDumper();
+
+  // dumps the heap to the specified file, returns 0 if success.
+  int dump(const char* path);
+
+  // returns error message (resource allocated), or NULL if no error
+  char* error_as_C_string() const;
+
+  static void dump_heap()    KERNEL_RETURN;
+};