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comparison src/cpu/zero/vm/nativeInst_zero.cpp @ 1010:354d3184f6b2

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6890308: integrate zero assembler hotspot changes Reviewed-by: never Contributed-by: gbenson@redhat.com
author never
date Tue, 13 Oct 2009 12:04:21 -0700
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children c18cbe5936b8
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1009:03b336640699 1010:354d3184f6b2
1 /*
2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any 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
48 Unimplemented();
49 #endif // CC_INTERP
50 }