--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/sparc/vm/dump_sparc.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2004-2007 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.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_dump_sparc.cpp.incl"
+
+
+
+// Generate the self-patching vtable method:
+//
+// This method will be called (as any other Klass virtual method) with
+// the Klass itself as the first argument.  Example:
+//
+//      oop obj;
+//      int size = obj->klass()->klass_part()->oop_size(this);
+//
+// for which the virtual method call is Klass::oop_size();
+//
+// The dummy method is called with the Klass object as the first
+// operand, and an object as the second argument.
+//
+
+//=====================================================================
+
+// All of the dummy methods in the vtable are essentially identical,
+// differing only by an ordinal constant, and they bear no releationship
+// to the original method which the caller intended. Also, there needs
+// to be 'vtbl_list_size' instances of the vtable in order to
+// differentiate between the 'vtable_list_size' original Klass objects.
+
+#define __ masm->
+
+void CompactingPermGenGen::generate_vtable_methods(void** vtbl_list,
+                                                   void** vtable,
+                                                   char** md_top,
+                                                   char* md_end,
+                                                   char** mc_top,
+                                                   char* mc_end) {
+
+  intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*);
+  *(intptr_t *)(*md_top) = vtable_bytes;
+  *md_top += sizeof(intptr_t);
+  void** dummy_vtable = (void**)*md_top;
+  *vtable = dummy_vtable;
+  *md_top += vtable_bytes;
+
+  guarantee(*md_top <= md_end, "Insufficient space for vtables.");
+
+  // Get ready to generate dummy methods.
+
+  CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top);
+  MacroAssembler* masm = new MacroAssembler(&cb);
+
+  Label common_code;
+  for (int i = 0; i < vtbl_list_size; ++i) {
+    for (int j = 0; j < num_virtuals; ++j) {
+      dummy_vtable[num_virtuals * i + j] = (void*)masm->pc();
+      __ save(SP, -256, SP);
+      __ brx(Assembler::always, false, Assembler::pt, common_code);
+
+      // Load L0 with a value indicating vtable/offset pair.
+      // -- bits[ 7..0]  (8 bits) which virtual method in table?
+      // -- bits[12..8]  (5 bits) which virtual method table?
+      // -- must fit in 13-bit instruction immediate field.
+      __ delayed()->set((i << 8) + j, L0);
+    }
+  }
+
+  __ bind(common_code);
+
+  // Expecting to be called with the "this" pointer in O0/I0 (where
+  // "this" is a Klass object).  In addition, L0 was set (above) to
+  // identify the method and table.
+
+  // Look up the correct vtable pointer.
+
+  __ set((intptr_t)vtbl_list, L2);      // L2 = address of new vtable list.
+  __ srl(L0, 8, L3);                    // Isolate L3 = vtable identifier.
+  __ sll(L3, LogBytesPerWord, L3);
+  __ ld_ptr(L2, L3, L3);                // L3 = new (correct) vtable pointer.
+  __ st_ptr(L3, Address(I0, 0));        // Save correct vtable ptr in entry.
+
+  // Restore registers and jump to the correct method;
+
+  __ and3(L0, 255, L4);                 // Isolate L3 = method offset;.
+  __ sll(L4, LogBytesPerWord, L4);
+  __ ld_ptr(L3, L4, L4);                // Get address of correct virtual method
+  Address method(L4, 0);
+  __ jmpl(method, G0);                  // Jump to correct method.
+  __ delayed()->restore();              // Restore registers.
+
+  __ flush();
+  *mc_top = (char*)__ pc();
+
+  guarantee(*mc_top <= mc_end, "Insufficient space for method wrappers.");
+}