/*
* Copyright ( c ) 1997 , 2020 , 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 .
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#ifndef SHARE_RUNTIME_VFRAME_HP_HPP
#define SHARE_RUNTIME_VFRAME_HP_HPP
#include "runtime/vframe.hpp"
class compiledVFrame: public javaVFrame {
friend class EscapeBarrier;
public :
// JVM state
Method* method() const ;
int bci() const ;
bool should_reexecute() const ;
StackValueCollection* locals() const ;
StackValueCollection* expressions() const ;
GrowableArray<MonitorInfo*>* monitors() const ;
int vframe_id() const { return _vframe_id; }
bool has_ea_local_in_scope() const ;
bool arg_escape() const ; // at call with arg escape in parameter list
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;
}
void update_deferred_value(BasicType type, int index, jvalue value);
// After object deoptimization, that is object reallocation and relocking, we
// create deferred updates for all objects in scope. No new update will be
// created if a deferred update already exists.
void create_deferred_updates_after_object_deoptimization();
public :
// Constructors
compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, CompiledMethod* nm);
// Update a local in a compiled frame. Update happens when deopt occurs
void update_local(BasicType type, int index, jvalue value);
// Update an expression stack value in a compiled frame. Update happens when deopt occurs
void update_stack(BasicType type, int index, jvalue value);
// Update a lock value in a compiled frame. Update happens when deopt occurs
void update_monitor(int index, MonitorInfo* value);
// Returns the active nmethod
CompiledMethod* code() const ;
// Returns the scopeDesc
ScopeDesc* scope() const { return _scope; }
// Return the compiledVFrame for the desired scope
compiledVFrame* at_scope(int decode_offset, int vframe_id);
// Returns SynchronizationEntryBCI or bci() (used for synchronization)
int raw_bci() const ;
protected :
ScopeDesc* _scope;
int _vframe_id;
//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, int vframe_id);
};
#endif // SHARE_RUNTIME_VFRAME_HP_HPP
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