Mercurial > hg > graal-compiler
annotate src/share/vm/code/icBuffer.hpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
| author | johnc |
|---|---|
| date | Wed, 12 Oct 2011 10:25:51 -0700 |
| parents | f95d63e2154a |
| children | da91efe96a93 8c5333c80cfd |
| rev | line source |
|---|---|
| 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 * | |
|
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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 |