1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_RUNTIME_VFRAME_HP_HPP 26 #define SHARE_VM_RUNTIME_VFRAME_HP_HPP 27 28 #include "runtime/vframe.hpp" 29 30 class compiledVFrame: public javaVFrame { 31 public: 32 // JVM state 33 Method* method() const; 34 int bci() const; 35 bool should_reexecute() const; 36 StackValueCollection* locals() const; 37 StackValueCollection* expressions() const; 38 GrowableArray<MonitorInfo*>* monitors() const; 39 int vframe_id() const { return _vframe_id; } 40 41 void set_locals(StackValueCollection* values) const; 42 43 // Virtuals defined in vframe 44 bool is_compiled_frame() const { return true; } 45 vframe* sender() const; 46 bool is_top() const; 47 48 // Casting 49 static compiledVFrame* cast(vframe* vf) { 50 assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame"); 51 return (compiledVFrame*) vf; 52 } 53 54 public: 55 // Constructors 56 compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, CompiledMethod* nm); 57 58 // Update a local in a compiled frame. Update happens when deopt occurs 59 void update_local(BasicType type, int index, jvalue value); 60 61 // Returns the active nmethod 62 CompiledMethod* code() const; 63 64 // Returns the scopeDesc 65 ScopeDesc* scope() const { return _scope; } 66 67 // Returns SynchronizationEntryBCI or bci() (used for synchronization) 68 int raw_bci() const; 69 70 protected: 71 ScopeDesc* _scope; 72 int _vframe_id; 73 74 //StackValue resolve(ScopeValue* sv) const; 75 BasicLock* resolve_monitor_lock(Location location) const; 76 StackValue *create_stack_value(ScopeValue *sv) const; 77 78 private: 79 compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope, int vframe_id); 80 81 #ifndef PRODUCT 82 public: 83 void verify() const; 84 #endif 85 }; 86 87 // In order to implement set_locals for compiled vframes we must 88 // store updated locals in a data structure that contains enough 89 // information to recognize equality with a vframe and to store 90 // any updated locals. 91 92 class jvmtiDeferredLocalVariable; 93 class jvmtiDeferredLocalVariableSet : public CHeapObj<mtCompiler> { 94 private: 95 96 Method* _method; 97 int _bci; 98 intptr_t* _id; 99 int _vframe_id; 100 GrowableArray<jvmtiDeferredLocalVariable*>* _locals; 101 102 public: 103 // JVM state 104 Method* method() const { return _method; } 105 int bci() const { return _bci; } 106 intptr_t* id() const { return _id; } 107 int vframe_id() const { return _vframe_id; } 108 GrowableArray<jvmtiDeferredLocalVariable*>* locals() const { return _locals; } 109 void set_local_at(int idx, BasicType typ, jvalue val); 110 111 // Does the vframe match this jvmtiDeferredLocalVariableSet 112 bool matches(vframe* vf); 113 // GC 114 void oops_do(OopClosure* f); 115 116 // constructor 117 jvmtiDeferredLocalVariableSet(Method* method, int bci, intptr_t* id, int vframe_id); 118 119 // destructor 120 ~jvmtiDeferredLocalVariableSet(); 121 122 123 }; 124 125 class jvmtiDeferredLocalVariable : public CHeapObj<mtCompiler> { 126 public: 127 128 jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value); 129 130 BasicType type(void) { return _type; } 131 int index(void) { return _index; } 132 jvalue value(void) { return _value; } 133 // Only mutator is for value as only it can change 134 void set_value(jvalue value) { _value = value; } 135 // For gc 136 oop* oop_addr(void) { return (oop*) &_value.l; } 137 138 private: 139 140 BasicType _type; 141 jvalue _value; 142 int _index; 143 144 }; 145 146 #endif // SHARE_VM_RUNTIME_VFRAME_HP_HPP