compiledIC_zero.cpp revision 4565:a6e09d6dd8e5 
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.
46void 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
55bool 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
64CompiledIC::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
91void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
92  ShouldNotReachHere(); // Only needed for COMPILER2.
93}
94
95int 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.
101int CompiledStaticCall::reloc_to_interp_stub() {
102  ShouldNotReachHere(); // Only needed for COMPILER2.
103  return 0;
104}
105
106void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
107  ShouldNotReachHere(); // Only needed for COMPILER2.
108}
109
110void 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
118void CompiledStaticCall::verify() {
119  ShouldNotReachHere(); // Only needed for COMPILER2.
120}
121
122#endif // !PRODUCT
123