Mercurial > hg > truffle
annotate src/share/vm/code/icBuffer.hpp @ 10408:836a62f43af9
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 19 Jun 2013 10:45:56 +0200 |
| parents | b9a918201d47 |
| children | d8041d695d19 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 * | |
|
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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 | |
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28 #include "asm/codeBuffer.hpp" |
| 1972 | 29 #include "code/stubs.hpp" |
| 30 #include "interpreter/bytecodes.hpp" | |
| 31 #include "memory/allocation.hpp" | |
| 32 | |
| 0 | 33 // |
| 34 // For CompiledIC's: | |
| 35 // | |
| 36 // In cases where we do not have MT-safe state transformation, | |
| 37 // we go to a transition state, using ICStubs. At a safepoint, | |
| 38 // the inline caches are transferred from the transitional code: | |
| 39 // | |
| 40 // instruction_address --> 01 set xxx_oop, Ginline_cache_klass | |
| 41 // 23 jump_to Gtemp, yyyy | |
| 42 // 4 nop | |
| 43 | |
| 44 class ICStub: public Stub { | |
| 45 private: | |
| 46 int _size; // total size of the stub incl. code | |
| 47 address _ic_site; // points at call instruction of owning ic-buffer | |
| 48 /* stub code follows here */ | |
| 49 protected: | |
| 50 friend class ICStubInterface; | |
| 51 // This will be called only by ICStubInterface | |
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52 void initialize(int size, |
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53 CodeStrings strings) { _size = size; _ic_site = NULL; } |
| 0 | 54 void finalize(); // called when a method is removed |
| 55 | |
| 56 // General info | |
| 57 int size() const { return _size; } | |
| 58 static int code_size_to_size(int code_size) { return round_to(sizeof(ICStub), CodeEntryAlignment) + code_size; } | |
| 59 | |
| 60 public: | |
| 61 // Creation | |
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62 void set_stub(CompiledIC *ic, void* cached_value, address dest_addr); |
| 0 | 63 |
| 64 // Code info | |
| 65 address code_begin() const { return (address)this + round_to(sizeof(ICStub), CodeEntryAlignment); } | |
| 66 address code_end() const { return (address)this + size(); } | |
| 67 | |
| 68 // Call site info | |
| 69 address ic_site() const { return _ic_site; } | |
| 70 void clear(); | |
| 71 bool is_empty() const { return _ic_site == NULL; } | |
| 72 | |
| 73 // stub info | |
| 74 address destination() const; // destination of jump instruction | |
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75 void* cached_value() const; // cached_value for stub |
| 0 | 76 |
| 77 // Debugging | |
| 78 void verify() PRODUCT_RETURN; | |
| 79 void print() PRODUCT_RETURN; | |
| 80 | |
| 81 // Creation | |
| 82 friend ICStub* ICStub_from_destination_address(address destination_address); | |
| 83 }; | |
| 84 | |
| 85 // ICStub Creation | |
| 86 inline ICStub* ICStub_from_destination_address(address destination_address) { | |
| 87 ICStub* stub = (ICStub*) (destination_address - round_to(sizeof(ICStub), CodeEntryAlignment)); | |
| 88 #ifdef ASSERT | |
| 89 stub->verify(); | |
| 90 #endif | |
| 91 return stub; | |
| 92 } | |
| 93 | |
| 94 class InlineCacheBuffer: public AllStatic { | |
| 95 private: | |
| 96 // friends | |
| 97 friend class ICStub; | |
| 98 | |
| 99 static int ic_stub_code_size(); | |
| 100 | |
| 101 static StubQueue* _buffer; | |
| 102 static ICStub* _next_stub; | |
| 103 | |
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104 static CompiledICHolder* _pending_released; |
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105 static int _pending_count; |
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106 |
| 0 | 107 static StubQueue* buffer() { return _buffer; } |
| 108 static void set_next_stub(ICStub* next_stub) { _next_stub = next_stub; } | |
| 109 static ICStub* get_next_stub() { return _next_stub; } | |
| 110 | |
| 111 static void init_next_stub(); | |
| 112 | |
| 113 static ICStub* new_ic_stub(); | |
| 114 | |
| 115 | |
| 116 // Machine-dependent implementation of ICBuffer | |
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117 static void assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point); |
| 0 | 118 static address ic_buffer_entry_point (address code_begin); |
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119 static void* ic_buffer_cached_value (address code_begin); |
| 0 | 120 |
| 121 public: | |
| 122 | |
| 123 // Initialization; must be called before first usage | |
| 124 static void initialize(); | |
| 125 | |
| 126 // Access | |
| 127 static bool contains(address instruction_address); | |
| 128 | |
| 129 // removes the ICStubs after backpatching | |
| 130 static void update_inline_caches(); | |
| 131 | |
| 132 // for debugging | |
| 133 static bool is_empty(); | |
| 134 | |
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135 static void release_pending_icholders(); |
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136 static void queue_for_release(CompiledICHolder* icholder); |
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137 static int pending_icholder_count() { return _pending_count; } |
| 0 | 138 |
| 139 // New interface | |
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140 static void create_transition_stub(CompiledIC *ic, void* cached_value, address entry); |
| 0 | 141 static address ic_destination_for(CompiledIC *ic); |
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142 static void* cached_value_for(CompiledIC *ic); |
| 0 | 143 }; |
| 1972 | 144 |
| 145 #endif // SHARE_VM_CODE_ICBUFFER_HPP |