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/*
* Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
class compiledVFrame: public javaVFrame {
public:
// JVM state
methodOop method() const;
int bci() const;
bool should_reexecute() 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;
};
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