Thu, 27 May 2010 18:01:56 -0700
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
Summary: Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov
duke@435 | 1 | /* |
xdono@1383 | 2 | * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | class compiledVFrame: public javaVFrame { |
duke@435 | 26 | public: |
duke@435 | 27 | // JVM state |
cfang@1335 | 28 | methodOop method() const; |
cfang@1335 | 29 | int bci() const; |
cfang@1335 | 30 | bool should_reexecute() const; |
cfang@1335 | 31 | StackValueCollection* locals() const; |
cfang@1335 | 32 | StackValueCollection* expressions() const; |
cfang@1335 | 33 | GrowableArray<MonitorInfo*>* monitors() const; |
duke@435 | 34 | |
duke@435 | 35 | void set_locals(StackValueCollection* values) const; |
duke@435 | 36 | |
duke@435 | 37 | // Virtuals defined in vframe |
duke@435 | 38 | bool is_compiled_frame() const { return true; } |
duke@435 | 39 | vframe* sender() const; |
duke@435 | 40 | bool is_top() const; |
duke@435 | 41 | |
duke@435 | 42 | // Casting |
duke@435 | 43 | static compiledVFrame* cast(vframe* vf) { |
duke@435 | 44 | assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame"); |
duke@435 | 45 | return (compiledVFrame*) vf; |
duke@435 | 46 | } |
duke@435 | 47 | |
duke@435 | 48 | public: |
duke@435 | 49 | // Constructors |
duke@435 | 50 | compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm); |
duke@435 | 51 | |
duke@435 | 52 | // Update a local in a compiled frame. Update happens when deopt occurs |
duke@435 | 53 | void update_local(BasicType type, int index, jvalue value); |
duke@435 | 54 | |
duke@435 | 55 | // Returns the active nmethod |
duke@435 | 56 | nmethod* code() const; |
duke@435 | 57 | |
duke@435 | 58 | // Returns the scopeDesc |
duke@435 | 59 | ScopeDesc* scope() const { return _scope; } |
duke@435 | 60 | |
duke@435 | 61 | // Returns SynchronizationEntryBCI or bci() (used for synchronization) |
duke@435 | 62 | int raw_bci() const; |
duke@435 | 63 | |
duke@435 | 64 | protected: |
duke@435 | 65 | ScopeDesc* _scope; |
duke@435 | 66 | |
duke@435 | 67 | |
duke@435 | 68 | //StackValue resolve(ScopeValue* sv) const; |
duke@435 | 69 | BasicLock* resolve_monitor_lock(Location location) const; |
duke@435 | 70 | StackValue *create_stack_value(ScopeValue *sv) const; |
duke@435 | 71 | |
duke@435 | 72 | private: |
duke@435 | 73 | compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope); |
duke@435 | 74 | |
duke@435 | 75 | #ifndef PRODUCT |
duke@435 | 76 | public: |
duke@435 | 77 | void verify() const; |
duke@435 | 78 | #endif |
duke@435 | 79 | }; |
duke@435 | 80 | |
duke@435 | 81 | // In order to implement set_locals for compiled vframes we must |
duke@435 | 82 | // store updated locals in a data structure that contains enough |
duke@435 | 83 | // information to recognize equality with a vframe and to store |
duke@435 | 84 | // any updated locals. |
duke@435 | 85 | |
duke@435 | 86 | class jvmtiDeferredLocalVariable; |
duke@435 | 87 | class jvmtiDeferredLocalVariableSet : public CHeapObj { |
duke@435 | 88 | private: |
duke@435 | 89 | |
duke@435 | 90 | methodOop _method; // must be GC'd |
duke@435 | 91 | int _bci; |
duke@435 | 92 | intptr_t* _id; |
duke@435 | 93 | GrowableArray<jvmtiDeferredLocalVariable*>* _locals; |
duke@435 | 94 | |
duke@435 | 95 | public: |
duke@435 | 96 | // JVM state |
duke@435 | 97 | methodOop method() const { return _method; } |
duke@435 | 98 | int bci() const { return _bci; } |
duke@435 | 99 | intptr_t* id() const { return _id; } |
duke@435 | 100 | GrowableArray<jvmtiDeferredLocalVariable*>* locals() const { return _locals; } |
duke@435 | 101 | void set_local_at(int idx, BasicType typ, jvalue val); |
duke@435 | 102 | |
duke@435 | 103 | // Does the vframe match this jvmtiDeferredLocalVariableSet |
duke@435 | 104 | bool matches(vframe* vf); |
duke@435 | 105 | // GC |
duke@435 | 106 | void oops_do(OopClosure* f); |
duke@435 | 107 | |
duke@435 | 108 | // constructor |
duke@435 | 109 | jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id); |
duke@435 | 110 | |
duke@435 | 111 | // destructor |
duke@435 | 112 | ~jvmtiDeferredLocalVariableSet(); |
duke@435 | 113 | |
duke@435 | 114 | |
duke@435 | 115 | }; |
duke@435 | 116 | |
duke@435 | 117 | class jvmtiDeferredLocalVariable : public CHeapObj { |
duke@435 | 118 | public: |
duke@435 | 119 | |
duke@435 | 120 | jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value); |
duke@435 | 121 | |
duke@435 | 122 | BasicType type(void) { return _type; } |
duke@435 | 123 | int index(void) { return _index; } |
duke@435 | 124 | jvalue value(void) { return _value; } |
duke@435 | 125 | // Only mutator is for value as only it can change |
duke@435 | 126 | void set_value(jvalue value) { _value = value; } |
duke@435 | 127 | // For gc |
duke@435 | 128 | oop* oop_addr(void) { return (oop*) &_value.l; } |
duke@435 | 129 | |
duke@435 | 130 | private: |
duke@435 | 131 | |
duke@435 | 132 | BasicType _type; |
duke@435 | 133 | jvalue _value; |
duke@435 | 134 | int _index; |
duke@435 | 135 | |
duke@435 | 136 | }; |