Mercurial > hg > truffle
comparison src/share/vm/code/icBuffer.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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1 /* | |
2 * Copyright 1997-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // | |
26 // For CompiledIC's: | |
27 // | |
28 // In cases where we do not have MT-safe state transformation, | |
29 // we go to a transition state, using ICStubs. At a safepoint, | |
30 // the inline caches are transferred from the transitional code: | |
31 // | |
32 // instruction_address --> 01 set xxx_oop, Ginline_cache_klass | |
33 // 23 jump_to Gtemp, yyyy | |
34 // 4 nop | |
35 | |
36 class ICStub: public Stub { | |
37 private: | |
38 int _size; // total size of the stub incl. code | |
39 address _ic_site; // points at call instruction of owning ic-buffer | |
40 /* stub code follows here */ | |
41 protected: | |
42 friend class ICStubInterface; | |
43 // This will be called only by ICStubInterface | |
44 void initialize(int size) { _size = size; _ic_site = NULL; } | |
45 void finalize(); // called when a method is removed | |
46 | |
47 // General info | |
48 int size() const { return _size; } | |
49 static int code_size_to_size(int code_size) { return round_to(sizeof(ICStub), CodeEntryAlignment) + code_size; } | |
50 | |
51 public: | |
52 // Creation | |
53 void set_stub(CompiledIC *ic, oop cached_value, address dest_addr); | |
54 | |
55 // Code info | |
56 address code_begin() const { return (address)this + round_to(sizeof(ICStub), CodeEntryAlignment); } | |
57 address code_end() const { return (address)this + size(); } | |
58 | |
59 // Call site info | |
60 address ic_site() const { return _ic_site; } | |
61 void clear(); | |
62 bool is_empty() const { return _ic_site == NULL; } | |
63 | |
64 // stub info | |
65 address destination() const; // destination of jump instruction | |
66 oop cached_oop() const; // cached_oop for stub | |
67 | |
68 // Debugging | |
69 void verify() PRODUCT_RETURN; | |
70 void print() PRODUCT_RETURN; | |
71 | |
72 // Creation | |
73 friend ICStub* ICStub_from_destination_address(address destination_address); | |
74 }; | |
75 | |
76 // ICStub Creation | |
77 inline ICStub* ICStub_from_destination_address(address destination_address) { | |
78 ICStub* stub = (ICStub*) (destination_address - round_to(sizeof(ICStub), CodeEntryAlignment)); | |
79 #ifdef ASSERT | |
80 stub->verify(); | |
81 #endif | |
82 return stub; | |
83 } | |
84 | |
85 class InlineCacheBuffer: public AllStatic { | |
86 private: | |
87 // friends | |
88 friend class ICStub; | |
89 | |
90 static int ic_stub_code_size(); | |
91 | |
92 static StubQueue* _buffer; | |
93 static ICStub* _next_stub; | |
94 | |
95 static StubQueue* buffer() { return _buffer; } | |
96 static void set_next_stub(ICStub* next_stub) { _next_stub = next_stub; } | |
97 static ICStub* get_next_stub() { return _next_stub; } | |
98 | |
99 static void init_next_stub(); | |
100 | |
101 static ICStub* new_ic_stub(); | |
102 | |
103 | |
104 // Machine-dependent implementation of ICBuffer | |
105 static void assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point); | |
106 static address ic_buffer_entry_point (address code_begin); | |
107 static oop ic_buffer_cached_oop (address code_begin); | |
108 | |
109 public: | |
110 | |
111 // Initialization; must be called before first usage | |
112 static void initialize(); | |
113 | |
114 // Access | |
115 static bool contains(address instruction_address); | |
116 | |
117 // removes the ICStubs after backpatching | |
118 static void update_inline_caches(); | |
119 | |
120 // for debugging | |
121 static bool is_empty(); | |
122 | |
123 | |
124 // New interface | |
125 static void create_transition_stub(CompiledIC *ic, oop cached_oop, address entry); | |
126 static address ic_destination_for(CompiledIC *ic); | |
127 static oop cached_oop_for(CompiledIC *ic); | |
128 }; |