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/*
* 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.
*
* 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.
*
*/
#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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