1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/codeCache.hpp"
28 #include "code/compiledIC.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/nmethod.hpp"
31 #include "code/vtableStubs.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/metadataFactory.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "oops/method.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "oops/symbol.hpp"
39 #include "runtime/icache.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "utilities/events.hpp"
43
44
45 // Release the CompiledICHolder* associated with this call site is there is one.
46 void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
47 // This call site might have become stale so inspect it carefully.
48 NativeCall* call = nativeCall_at(call_site->addr());
49 if (is_icholder_entry(call->destination())) {
50 NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
51 InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
52 }
53 }
54
55 bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
56 // This call site might have become stale so inspect it carefully.
57 NativeCall* call = nativeCall_at(call_site->addr());
58 return is_icholder_entry(call->destination());
59 }
60
61 //-----------------------------------------------------------------------------
62 // High-level access to an inline cache. Guaranteed to be MT-safe.
63
64 CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
65 : _ic_call(call)
66 {
67 address ic_call = call->instruction_address();
68
69 assert(ic_call != NULL, "ic_call address must be set");
70 assert(nm != NULL, "must pass nmethod");
71 assert(nm->contains(ic_call), "must be in nmethod");
72
73 // Search for the ic_call at the given address.
74 RelocIterator iter(nm, ic_call, ic_call+1);
75 bool ret = iter.next();
76 assert(ret == true, "relocInfo must exist at this address");
77 assert(iter.addr() == ic_call, "must find ic_call");
78 if (iter.type() == relocInfo::virtual_call_type) {
79 virtual_call_Relocation* r = iter.virtual_call_reloc();
80 _is_optimized = false;
81 _value = nativeMovConstReg_at(r->cached_value());
82 } else {
83 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
84 _is_optimized = true;
85 _value = NULL;
86 }
87 }
88
89 // ----------------------------------------------------------------------------
90
91 void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
92 ShouldNotReachHere(); // Only needed for COMPILER2.
93 }
94
95 uint CompiledStaticCall::to_interp_stub_size() {
96 ShouldNotReachHere(); // Only needed for COMPILER2.
97 return 0;
98 }
99
100 // Relocation entries for call stub, compiled java to interpreter.
101 uint CompiledStaticCall::reloc_to_interp_stub() {
102 ShouldNotReachHere(); // Only needed for COMPILER2.
103 return 0;
104 }
105
106 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
107 ShouldNotReachHere(); // Only needed for COMPILER2.
108 }
109
110 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
111 ShouldNotReachHere(); // Only needed for COMPILER2.
112 }
113
114 //-----------------------------------------------------------------------------
115 // Non-product mode code.
116 #ifndef PRODUCT
117
118 void CompiledStaticCall::verify() {
119 ShouldNotReachHere(); // Only needed for COMPILER2.
120 }
121
122 #endif // !PRODUCT