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hotspot/src/share/vm/runtime/vframe_hp.hpp

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+/*
+ * Copyright 1997-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+class compiledVFrame: public javaVFrame {
+ public:
+  // JVM state
+  methodOop                    method()         const;
+  int                          bci()            const;
+  StackValueCollection*        locals()         const;
+  StackValueCollection*        expressions()    const;
+  GrowableArray<MonitorInfo*>* monitors()       const;
+
+  void set_locals(StackValueCollection* values) const;
+
+  // Virtuals defined in vframe
+  bool is_compiled_frame() const { return true; }
+  vframe* sender() const;
+  bool is_top() const;
+
+  // Casting
+  static compiledVFrame* cast(vframe* vf) {
+    assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame");
+    return (compiledVFrame*) vf;
+  }
+
+ public:
+  // Constructors
+  compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm);
+
+  // Update a local in a compiled frame. Update happens when deopt occurs
+  void update_local(BasicType type, int index, jvalue value);
+
+  // Returns the active nmethod
+  nmethod*  code() const;
+
+  // Returns the scopeDesc
+  ScopeDesc* scope() const { return _scope; }
+
+  // Returns SynchronizationEntryBCI or bci() (used for synchronization)
+  int raw_bci() const;
+
+ protected:
+  ScopeDesc* _scope;
+
+
+  //StackValue resolve(ScopeValue* sv) const;
+  BasicLock* resolve_monitor_lock(Location location) const;
+  StackValue *create_stack_value(ScopeValue *sv) const;
+
+ private:
+  compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope);
+
+#ifndef PRODUCT
+ public:
+  void verify() const;
+#endif
+};
+
+// In order to implement set_locals for compiled vframes we must
+// store updated locals in a data structure that contains enough
+// information to recognize equality with a vframe and to store
+// any updated locals.
+
+class jvmtiDeferredLocalVariable;
+class jvmtiDeferredLocalVariableSet : public CHeapObj {
+private:
+
+  methodOop _method;           // must be GC'd
+  int       _bci;
+  intptr_t* _id;
+  GrowableArray<jvmtiDeferredLocalVariable*>* _locals;
+
+ public:
+  // JVM state
+  methodOop                         method()         const  { return _method; }
+  int                               bci()            const  { return _bci; }
+  intptr_t*                         id()             const  { return _id; }
+  GrowableArray<jvmtiDeferredLocalVariable*>* locals()         const  { return _locals; }
+  void                              set_local_at(int idx, BasicType typ, jvalue val);
+
+  // Does the vframe match this jvmtiDeferredLocalVariableSet
+  bool                              matches(vframe* vf);
+  // GC
+  void                              oops_do(OopClosure* f);
+
+  // constructor
+  jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id);
+
+  // destructor
+  ~jvmtiDeferredLocalVariableSet();
+
+
+};
+
+class jvmtiDeferredLocalVariable : public CHeapObj {
+  public:
+
+    jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value);
+
+    BasicType type(void)                   { return _type; }
+    int index(void)                        { return _index; }
+    jvalue value(void)                     { return _value; }
+    // Only mutator is for value as only it can change
+    void set_value(jvalue value)           { _value = value; }
+    // For gc
+    oop* oop_addr(void)                    { return (oop*) &_value.l; }
+
+  private:
+
+    BasicType         _type;
+    jvalue            _value;
+    int               _index;
+
+};