Tue, 08 Aug 2017 15:57:29 +0800
merge
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 */
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
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.
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");
54 #ifdef CC_INTERP
55 ((ZeroEntry*) verified_entry)->set_entry_point(
56 (address) CppInterpreter::normal_entry);
57 #else
58 Unimplemented();
59 #endif // CC_INTERP
60 }