1 /* 2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. 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 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 class compiledVFrame: public javaVFrame { 26 public: 27 // JVM state 28 methodOop method() const; 29 int bci() const; 30 bool is_restart() const; 31 StackValueCollection* locals() const; 32 StackValueCollection* expressions() const; 33 GrowableArray<MonitorInfo*>* monitors() const; 34 35 void set_locals(StackValueCollection* values) const; 36 37 // Virtuals defined in vframe 38 bool is_compiled_frame() const { return true; } 39 vframe* sender() const; 40 bool is_top() const; 41 42 // Casting 43 static compiledVFrame* cast(vframe* vf) { 44 assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame"); 45 return (compiledVFrame*) vf; 46 } 47 48 public: 49 // Constructors 50 compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm); 51 52 // Update a local in a compiled frame. Update happens when deopt occurs 53 void update_local(BasicType type, int index, jvalue value); 54 55 // Returns the active nmethod 56 nmethod* code() const; 57 58 // Returns the scopeDesc 59 ScopeDesc* scope() const { return _scope; } 60 61 // Returns SynchronizationEntryBCI or bci() (used for synchronization) 62 int raw_bci() const; 63 64 protected: 65 ScopeDesc* _scope; 66 67 68 //StackValue resolve(ScopeValue* sv) const; 69 BasicLock* resolve_monitor_lock(Location location) const; 70 StackValue *create_stack_value(ScopeValue *sv) const; 71 72 private: 73 compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope); 74 75 #ifndef PRODUCT 76 public: 77 void verify() const; 78 #endif 79 }; 80 81 // In order to implement set_locals for compiled vframes we must 82 // store updated locals in a data structure that contains enough 83 // information to recognize equality with a vframe and to store 84 // any updated locals. 85 86 class jvmtiDeferredLocalVariable; 87 class jvmtiDeferredLocalVariableSet : public CHeapObj { 88 private: 89 90 methodOop _method; // must be GC'd 91 int _bci; 92 intptr_t* _id; 93 GrowableArray<jvmtiDeferredLocalVariable*>* _locals; 94 95 public: 96 // JVM state 97 methodOop method() const { return _method; } 98 int bci() const { return _bci; } 99 intptr_t* id() const { return _id; } 100 GrowableArray<jvmtiDeferredLocalVariable*>* locals() const { return _locals; } 101 void set_local_at(int idx, BasicType typ, jvalue val); 102 103 // Does the vframe match this jvmtiDeferredLocalVariableSet 104 bool matches(vframe* vf); 105 // GC 106 void oops_do(OopClosure* f); 107 108 // constructor 109 jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id); 110 111 // destructor 112 ~jvmtiDeferredLocalVariableSet(); 113 114 115 }; 116 117 class jvmtiDeferredLocalVariable : public CHeapObj { 118 public: 119 120 jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value); 121 122 BasicType type(void) { return _type; } 123 int index(void) { return _index; } 124 jvalue value(void) { return _value; } 125 // Only mutator is for value as only it can change 126 void set_value(jvalue value) { _value = value; } 127 // For gc 128 oop* oop_addr(void) { return (oop*) &_value.l; } 129 130 private: 131 132 BasicType _type; 133 jvalue _value; 134 int _index; 135 136 };