Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/vframe_hp.hpp @ 3979:4dfb2df418f2
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| author | johnc |
|---|---|
| date | Thu, 22 Sep 2011 10:57:37 -0700 |
| parents | f95d63e2154a |
| children | 5857923e563c d2a62e0f25eb |
| 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_RUNTIME_VFRAME_HP_HPP |
| 26 #define SHARE_VM_RUNTIME_VFRAME_HP_HPP | |
| 27 | |
| 28 #include "runtime/vframe.hpp" | |
| 29 | |
| 0 | 30 class compiledVFrame: public javaVFrame { |
| 31 public: | |
| 32 // JVM state | |
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33 methodOop method() const; |
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34 int bci() const; |
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35 bool should_reexecute() const; |
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36 StackValueCollection* locals() const; |
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37 StackValueCollection* expressions() const; |
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38 GrowableArray<MonitorInfo*>* monitors() const; |
| 0 | 39 |
| 40 void set_locals(StackValueCollection* values) const; | |
| 41 | |
| 42 // Virtuals defined in vframe | |
| 43 bool is_compiled_frame() const { return true; } | |
| 44 vframe* sender() const; | |
| 45 bool is_top() const; | |
| 46 | |
| 47 // Casting | |
| 48 static compiledVFrame* cast(vframe* vf) { | |
| 49 assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame"); | |
| 50 return (compiledVFrame*) vf; | |
| 51 } | |
| 52 | |
| 53 public: | |
| 54 // Constructors | |
| 55 compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm); | |
| 56 | |
| 57 // Update a local in a compiled frame. Update happens when deopt occurs | |
| 58 void update_local(BasicType type, int index, jvalue value); | |
| 59 | |
| 60 // Returns the active nmethod | |
| 61 nmethod* code() const; | |
| 62 | |
| 63 // Returns the scopeDesc | |
| 64 ScopeDesc* scope() const { return _scope; } | |
| 65 | |
| 66 // Returns SynchronizationEntryBCI or bci() (used for synchronization) | |
| 67 int raw_bci() const; | |
| 68 | |
| 69 protected: | |
| 70 ScopeDesc* _scope; | |
| 71 | |
| 72 | |
| 73 //StackValue resolve(ScopeValue* sv) const; | |
| 74 BasicLock* resolve_monitor_lock(Location location) const; | |
| 75 StackValue *create_stack_value(ScopeValue *sv) const; | |
| 76 | |
| 77 private: | |
| 78 compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope); | |
| 79 | |
| 80 #ifndef PRODUCT | |
| 81 public: | |
| 82 void verify() const; | |
| 83 #endif | |
| 84 }; | |
| 85 | |
| 86 // In order to implement set_locals for compiled vframes we must | |
| 87 // store updated locals in a data structure that contains enough | |
| 88 // information to recognize equality with a vframe and to store | |
| 89 // any updated locals. | |
| 90 | |
| 91 class jvmtiDeferredLocalVariable; | |
| 92 class jvmtiDeferredLocalVariableSet : public CHeapObj { | |
| 93 private: | |
| 94 | |
| 95 methodOop _method; // must be GC'd | |
| 96 int _bci; | |
| 97 intptr_t* _id; | |
| 98 GrowableArray<jvmtiDeferredLocalVariable*>* _locals; | |
| 99 | |
| 100 public: | |
| 101 // JVM state | |
| 102 methodOop method() const { return _method; } | |
| 103 int bci() const { return _bci; } | |
| 104 intptr_t* id() const { return _id; } | |
| 105 GrowableArray<jvmtiDeferredLocalVariable*>* locals() const { return _locals; } | |
| 106 void set_local_at(int idx, BasicType typ, jvalue val); | |
| 107 | |
| 108 // Does the vframe match this jvmtiDeferredLocalVariableSet | |
| 109 bool matches(vframe* vf); | |
| 110 // GC | |
| 111 void oops_do(OopClosure* f); | |
| 112 | |
| 113 // constructor | |
| 114 jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id); | |
| 115 | |
| 116 // destructor | |
| 117 ~jvmtiDeferredLocalVariableSet(); | |
| 118 | |
| 119 | |
| 120 }; | |
| 121 | |
| 122 class jvmtiDeferredLocalVariable : public CHeapObj { | |
| 123 public: | |
| 124 | |
| 125 jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value); | |
| 126 | |
| 127 BasicType type(void) { return _type; } | |
| 128 int index(void) { return _index; } | |
| 129 jvalue value(void) { return _value; } | |
| 130 // Only mutator is for value as only it can change | |
| 131 void set_value(jvalue value) { _value = value; } | |
| 132 // For gc | |
| 133 oop* oop_addr(void) { return (oop*) &_value.l; } | |
| 134 | |
| 135 private: | |
| 136 | |
| 137 BasicType _type; | |
| 138 jvalue _value; | |
| 139 int _index; | |
| 140 | |
| 141 }; | |
| 1972 | 142 |
| 143 #endif // SHARE_VM_RUNTIME_VFRAME_HP_HPP |