1 /*
   2  * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2008 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "incls/_precompiled.incl"
  27 #include "incls/_nativeInst_zero.cpp.incl"










  28 
  29 // This method is called by nmethod::make_not_entrant_or_zombie to
  30 // insert a jump to SharedRuntime::get_handle_wrong_method_stub()
  31 // (dest) at the start of a compiled method (verified_entry) to avoid
  32 // a race where a method is invoked while being made non-entrant.
  33 //
  34 // In Shark, verified_entry is a pointer to a SharkEntry.  We can
  35 // handle this simply by changing it's entry point to point at the
  36 // interpreter.  This only works because the interpreter and Shark
  37 // calling conventions are the same.
  38 
  39 void NativeJump::patch_verified_entry(address entry,
  40                                       address verified_entry,
  41                                       address dest) {
  42   assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "should be");
  43 
  44 #ifdef CC_INTERP
  45   ((ZeroEntry*) verified_entry)->set_entry_point(
  46     (address) CppInterpreter::normal_entry);
  47 #else

   1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2008 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "assembler_zero.inline.hpp"
  28 #include "memory/resourceArea.hpp"
  29 #include "nativeInst_zero.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/handles.hpp"
  32 #include "runtime/sharedRuntime.hpp"
  33 #include "runtime/stubRoutines.hpp"
  34 #include "utilities/ostream.hpp"
  35 #ifdef COMPILER1
  36 #include "c1/c1_Runtime1.hpp"
  37 #endif
  38 
  39 // This method is called by nmethod::make_not_entrant_or_zombie to
  40 // insert a jump to SharedRuntime::get_handle_wrong_method_stub()
  41 // (dest) at the start of a compiled method (verified_entry) to avoid
  42 // a race where a method is invoked while being made non-entrant.
  43 //
  44 // In Shark, verified_entry is a pointer to a SharkEntry.  We can
  45 // handle this simply by changing it's entry point to point at the
  46 // interpreter.  This only works because the interpreter and Shark
  47 // calling conventions are the same.
  48 
  49 void NativeJump::patch_verified_entry(address entry,
  50                                       address verified_entry,
  51                                       address dest) {
  52   assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "should be");
  53 
  54 #ifdef CC_INTERP
  55   ((ZeroEntry*) verified_entry)->set_entry_point(
  56     (address) CppInterpreter::normal_entry);
  57 #else