Mercurial > hg > truffle
annotate src/share/vm/code/icBuffer.hpp @ 4530:6c6cb7be1324
bugfix
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Wed, 08 Feb 2012 21:13:35 -0800 |
parents | f95d63e2154a |
children | da91efe96a93 8c5333c80cfd |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_CODE_ICBUFFER_HPP |
26 #define SHARE_VM_CODE_ICBUFFER_HPP | |
27 | |
28 #include "code/stubs.hpp" | |
29 #include "interpreter/bytecodes.hpp" | |
30 #include "memory/allocation.hpp" | |
31 | |
0 | 32 // |
33 // For CompiledIC's: | |
34 // | |
35 // In cases where we do not have MT-safe state transformation, | |
36 // we go to a transition state, using ICStubs. At a safepoint, | |
37 // the inline caches are transferred from the transitional code: | |
38 // | |
39 // instruction_address --> 01 set xxx_oop, Ginline_cache_klass | |
40 // 23 jump_to Gtemp, yyyy | |
41 // 4 nop | |
42 | |
43 class ICStub: public Stub { | |
44 private: | |
45 int _size; // total size of the stub incl. code | |
46 address _ic_site; // points at call instruction of owning ic-buffer | |
47 /* stub code follows here */ | |
48 protected: | |
49 friend class ICStubInterface; | |
50 // This will be called only by ICStubInterface | |
51 void initialize(int size) { _size = size; _ic_site = NULL; } | |
52 void finalize(); // called when a method is removed | |
53 | |
54 // General info | |
55 int size() const { return _size; } | |
56 static int code_size_to_size(int code_size) { return round_to(sizeof(ICStub), CodeEntryAlignment) + code_size; } | |
57 | |
58 public: | |
59 // Creation | |
60 void set_stub(CompiledIC *ic, oop cached_value, address dest_addr); | |
61 | |
62 // Code info | |
63 address code_begin() const { return (address)this + round_to(sizeof(ICStub), CodeEntryAlignment); } | |
64 address code_end() const { return (address)this + size(); } | |
65 | |
66 // Call site info | |
67 address ic_site() const { return _ic_site; } | |
68 void clear(); | |
69 bool is_empty() const { return _ic_site == NULL; } | |
70 | |
71 // stub info | |
72 address destination() const; // destination of jump instruction | |
73 oop cached_oop() const; // cached_oop for stub | |
74 | |
75 // Debugging | |
76 void verify() PRODUCT_RETURN; | |
77 void print() PRODUCT_RETURN; | |
78 | |
79 // Creation | |
80 friend ICStub* ICStub_from_destination_address(address destination_address); | |
81 }; | |
82 | |
83 // ICStub Creation | |
84 inline ICStub* ICStub_from_destination_address(address destination_address) { | |
85 ICStub* stub = (ICStub*) (destination_address - round_to(sizeof(ICStub), CodeEntryAlignment)); | |
86 #ifdef ASSERT | |
87 stub->verify(); | |
88 #endif | |
89 return stub; | |
90 } | |
91 | |
92 class InlineCacheBuffer: public AllStatic { | |
93 private: | |
94 // friends | |
95 friend class ICStub; | |
96 | |
97 static int ic_stub_code_size(); | |
98 | |
99 static StubQueue* _buffer; | |
100 static ICStub* _next_stub; | |
101 | |
102 static StubQueue* buffer() { return _buffer; } | |
103 static void set_next_stub(ICStub* next_stub) { _next_stub = next_stub; } | |
104 static ICStub* get_next_stub() { return _next_stub; } | |
105 | |
106 static void init_next_stub(); | |
107 | |
108 static ICStub* new_ic_stub(); | |
109 | |
110 | |
111 // Machine-dependent implementation of ICBuffer | |
112 static void assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point); | |
113 static address ic_buffer_entry_point (address code_begin); | |
114 static oop ic_buffer_cached_oop (address code_begin); | |
115 | |
116 public: | |
117 | |
118 // Initialization; must be called before first usage | |
119 static void initialize(); | |
120 | |
121 // Access | |
122 static bool contains(address instruction_address); | |
123 | |
124 // removes the ICStubs after backpatching | |
125 static void update_inline_caches(); | |
126 | |
127 // for debugging | |
128 static bool is_empty(); | |
129 | |
130 | |
131 // New interface | |
132 static void create_transition_stub(CompiledIC *ic, oop cached_oop, address entry); | |
133 static address ic_destination_for(CompiledIC *ic); | |
134 static oop cached_oop_for(CompiledIC *ic); | |
135 }; | |
1972 | 136 |
137 #endif // SHARE_VM_CODE_ICBUFFER_HPP |