Mercurial > hg > graal-compiler
annotate src/share/vm/interpreter/interpreter.hpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | 126ea7725993 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2007, 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 | |
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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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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 | |
605 | 25 // This file contains the platform-independent parts |
0 | 26 // of the interpreter and the interpreter generator. |
27 | |
28 //------------------------------------------------------------------------------------------------------------------------ | |
29 // An InterpreterCodelet is a piece of interpreter code. All | |
30 // interpreter code is generated into little codelets which | |
31 // contain extra information for debugging and printing purposes. | |
32 | |
33 class InterpreterCodelet: public Stub { | |
34 friend class VMStructs; | |
35 private: | |
36 int _size; // the size in bytes | |
37 const char* _description; // a description of the codelet, for debugging & printing | |
38 Bytecodes::Code _bytecode; // associated bytecode if any | |
39 | |
40 public: | |
41 // Initialization/finalization | |
42 void initialize(int size) { _size = size; } | |
43 void finalize() { ShouldNotCallThis(); } | |
44 | |
45 // General info/converters | |
46 int size() const { return _size; } | |
47 static int code_size_to_size(int code_size) { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; } | |
48 | |
49 // Code info | |
50 address code_begin() const { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); } | |
51 address code_end() const { return (address)this + size(); } | |
52 | |
53 // Debugging | |
54 void verify(); | |
55 void print(); | |
56 | |
57 // Interpreter-specific initialization | |
58 void initialize(const char* description, Bytecodes::Code bytecode); | |
59 | |
60 // Interpreter-specific attributes | |
61 int code_size() const { return code_end() - code_begin(); } | |
62 const char* description() const { return _description; } | |
63 Bytecodes::Code bytecode() const { return _bytecode; } | |
64 }; | |
65 | |
66 // Define a prototype interface | |
67 DEF_STUB_INTERFACE(InterpreterCodelet); | |
68 | |
69 | |
70 //------------------------------------------------------------------------------------------------------------------------ | |
71 // A CodeletMark serves as an automatic creator/initializer for Codelets | |
72 // (As a subclass of ResourceMark it automatically GC's the allocated | |
73 // code buffer and assemblers). | |
74 | |
75 class CodeletMark: ResourceMark { | |
76 private: | |
77 InterpreterCodelet* _clet; | |
78 InterpreterMacroAssembler** _masm; | |
79 CodeBuffer _cb; | |
80 | |
81 int codelet_size() { | |
82 // Request the whole code buffer (minus a little for alignment). | |
83 // The commit call below trims it back for each codelet. | |
84 int codelet_size = AbstractInterpreter::code()->available_space() - 2*K; | |
85 | |
86 // Guarantee there's a little bit of code space left. | |
87 guarantee (codelet_size > 0 && (size_t)codelet_size > 2*K, | |
88 "not enough space for interpreter generation"); | |
89 | |
90 return codelet_size; | |
91 } | |
92 | |
93 public: | |
94 CodeletMark( | |
95 InterpreterMacroAssembler*& masm, | |
96 const char* description, | |
97 Bytecodes::Code bytecode = Bytecodes::_illegal): | |
98 _clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())), | |
99 _cb(_clet->code_begin(), _clet->code_size()) | |
100 | |
101 { // request all space (add some slack for Codelet data) | |
102 assert (_clet != NULL, "we checked not enough space already"); | |
103 | |
104 // initialize Codelet attributes | |
105 _clet->initialize(description, bytecode); | |
106 // create assembler for code generation | |
107 masm = new InterpreterMacroAssembler(&_cb); | |
108 _masm = &masm; | |
109 } | |
110 | |
111 ~CodeletMark() { | |
112 // align so printing shows nop's instead of random code at the end (Codelets are aligned) | |
113 (*_masm)->align(wordSize); | |
114 // make sure all code is in code buffer | |
115 (*_masm)->flush(); | |
116 | |
117 | |
118 // commit Codelet | |
119 AbstractInterpreter::code()->commit((*_masm)->code()->pure_code_size()); | |
120 // make sure nobody can use _masm outside a CodeletMark lifespan | |
121 *_masm = NULL; | |
122 } | |
123 }; | |
124 | |
125 // Wrapper classes to produce Interpreter/InterpreterGenerator from either | |
126 // the c++ interpreter or the template interpreter. | |
127 | |
128 class Interpreter: public CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) { | |
129 | |
130 public: | |
131 // Debugging/printing | |
132 static InterpreterCodelet* codelet_containing(address pc) { return (InterpreterCodelet*)_code->stub_containing(pc); } | |
133 #include "incls/_interpreter_pd.hpp.incl" | |
134 }; |