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