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 /*

  * Copyright (c) 2001, 2010, 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.

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  */

 #ifndef SHARE_VM_CI_CIMETHODDATA_HPP

 #define SHARE_VM_CI_CIMETHODDATA_HPP

 #include "ci/ciClassList.hpp"

 #include "ci/ciKlass.hpp"

 #include "ci/ciObject.hpp"

 #include "ci/ciUtilities.hpp"

 #include "oops/methodDataOop.hpp"

 #include "oops/oop.inline.hpp"

 class ciBitData;

 class ciCounterData;

 class ciJumpData;

 class ciReceiverTypeData;

 class ciRetData;

 class ciBranchData;

 class ciArrayData;

 class ciMultiBranchData;

 class ciArgInfoData;

 typedef ProfileData ciProfileData;

 class ciBitData : public BitData {

 public:

   ciBitData(DataLayout* layout) : BitData(layout) {};

 };

 class ciCounterData : public CounterData {

 public:

   ciCounterData(DataLayout* layout) : CounterData(layout) {};

 };

 class ciJumpData : public JumpData {

 public:

   ciJumpData(DataLayout* layout) : JumpData(layout) {};

 };

 class ciReceiverTypeData : public ReceiverTypeData {

 public:

   ciReceiverTypeData(DataLayout* layout) : ReceiverTypeData(layout) {};

   void set_receiver(uint row, ciKlass* recv) {

     assert((uint)row < row_limit(), "oob");

     set_intptr_at(receiver0_offset + row * receiver_type_row_cell_count,

                   (intptr_t) recv);

   }

   ciKlass* receiver(uint row) {

     assert((uint)row < row_limit(), "oob");

     ciObject* recv = (ciObject*)intptr_at(receiver0_offset + row * receiver_type_row_cell_count);

     assert(recv == NULL || recv->is_klass(), "wrong type");

     return (ciKlass*)recv;

   }

   // Copy & translate from oop based ReceiverTypeData

   virtual void translate_from(ProfileData* data) {

     translate_receiver_data_from(data);

   }

   void translate_receiver_data_from(ProfileData* data);

 #ifndef PRODUCT

   void print_data_on(outputStream* st);

   void print_receiver_data_on(outputStream* st);

 #endif

 };

 class ciVirtualCallData : public VirtualCallData {

   // Fake multiple inheritance...  It's a ciReceiverTypeData also.

   ciReceiverTypeData* rtd_super() { return (ciReceiverTypeData*) this; }

 public:

   ciVirtualCallData(DataLayout* layout) : VirtualCallData(layout) {};

   void set_receiver(uint row, ciKlass* recv) {

     rtd_super()->set_receiver(row, recv);

   }

   ciKlass* receiver(uint row) {

     return rtd_super()->receiver(row);

   }

   // Copy & translate from oop based VirtualCallData

   virtual void translate_from(ProfileData* data) {

     rtd_super()->translate_receiver_data_from(data);

   }

 #ifndef PRODUCT

   void print_data_on(outputStream* st);

 #endif

 };

 class ciRetData : public RetData {

 public:

   ciRetData(DataLayout* layout) : RetData(layout) {};

 };

 class ciBranchData : public BranchData {

 public:

   ciBranchData(DataLayout* layout) : BranchData(layout) {};

 };

 class ciArrayData : public ArrayData {

 public:

   ciArrayData(DataLayout* layout) : ArrayData(layout) {};

 };

 class ciMultiBranchData : public MultiBranchData {

 public:

   ciMultiBranchData(DataLayout* layout) : MultiBranchData(layout) {};

 };

 class ciArgInfoData : public ArgInfoData {

 public:

   ciArgInfoData(DataLayout* layout) : ArgInfoData(layout) {};

 };

 // ciMethodData

 //

 // This class represents a methodDataOop in the HotSpot virtual

 // machine.

 class ciMethodData : public ciObject {

   CI_PACKAGE_ACCESS

 private:

   // Size in bytes

   int _data_size;

   int _extra_data_size;

   // Data entries

   intptr_t* _data;

   // Cached hint for data_before()

   int _hint_di;

   // Is data attached?  And is it mature?

   enum { empty_state, immature_state, mature_state };

   u_char _state;

   // Set this true if empty extra_data slots are ever witnessed.

   u_char _saw_free_extra_data;

   // Support for interprocedural escape analysis

   intx              _eflags;          // flags on escape information

   intx              _arg_local;       // bit set of non-escaping arguments

   intx              _arg_stack;       // bit set of stack-allocatable arguments

   intx              _arg_returned;    // bit set of returned arguments

   // Maturity of the oop when the snapshot is taken.

   int _current_mileage;

   // These counters hold the age of MDO in tiered. In tiered we can have the same method

   // running at different compilation levels concurrently. So, in order to precisely measure

   // its maturity we need separate counters.

   int _invocation_counter;

   int _backedge_counter;

   // Coherent snapshot of original header.

   methodDataOopDesc _orig;

   ciMethodData(methodDataHandle h_md);

   ciMethodData();

   // Accessors

   int data_size() const { return _data_size; }

   int extra_data_size() const { return _extra_data_size; }

   intptr_t * data() const { return _data; }

   methodDataOop get_methodDataOop() const {

     if (handle() == NULL) return NULL;

     methodDataOop mdo = (methodDataOop)get_oop();

     assert(mdo != NULL, "illegal use of unloaded method data");

     return mdo;

   }

   const char* type_string()                      { return "ciMethodData"; }

   void print_impl(outputStream* st);

   DataLayout* data_layout_at(int data_index) const {

     assert(data_index % sizeof(intptr_t) == 0, "unaligned");

     return (DataLayout*) (((address)_data) + data_index);

   }

   bool out_of_bounds(int data_index) {

     return data_index >= data_size();

   }

   // hint accessors

   int      hint_di() const  { return _hint_di; }

   void set_hint_di(int di)  {

     assert(!out_of_bounds(di), "hint_di out of bounds");

     _hint_di = di;

   }

   ciProfileData* data_before(int bci) {

     // avoid SEGV on this edge case

     if (data_size() == 0)

       return NULL;

     int hint = hint_di();

     if (data_layout_at(hint)->bci() <= bci)

       return data_at(hint);

     return first_data();

   }

   // What is the index of the first data entry?

   int first_di() { return 0; }

   ciArgInfoData *arg_info() const;

 public:

   bool is_method_data()  { return true; }

   bool is_empty() { return _state == empty_state; }

   bool is_mature() { return _state == mature_state; }

   int creation_mileage() { return _orig.creation_mileage(); }

   int current_mileage()  { return _current_mileage; }

   int invocation_count() { return _invocation_counter; }

   int backedge_count()   { return _backedge_counter;   }

   // Transfer information about the method to methodDataOop.

   // would_profile means we would like to profile this method,

   // meaning it's not trivial.

   void set_would_profile(bool p);

   // Also set the numer of loops and blocks in the method.

   // Again, this is used to determine if a method is trivial.

   void set_compilation_stats(short loops, short blocks);

   void load_data();

   // Convert a dp (data pointer) to a di (data index).

   int dp_to_di(address dp) {

     return dp - ((address)_data);

   }

   // Get the data at an arbitrary (sort of) data index.

   ciProfileData* data_at(int data_index);

   // Walk through the data in order.

   ciProfileData* first_data() { return data_at(first_di()); }

   ciProfileData* next_data(ciProfileData* current);

   bool is_valid(ciProfileData* current) { return current != NULL; }

   // Get the data at an arbitrary bci, or NULL if there is none.

   ciProfileData* bci_to_data(int bci);

   ciProfileData* bci_to_extra_data(int bci, bool create_if_missing);

   uint overflow_trap_count() const {

     return _orig.overflow_trap_count();

   }

   uint overflow_recompile_count() const {

     return _orig.overflow_recompile_count();

   }

   uint decompile_count() const {

     return _orig.decompile_count();

   }

   uint trap_count(int reason) const {

     return _orig.trap_count(reason);

   }

   uint trap_reason_limit() const { return _orig.trap_reason_limit(); }

   uint trap_count_limit()  const { return _orig.trap_count_limit(); }

   // Helpful query functions that decode trap_state.

   int has_trap_at(ciProfileData* data, int reason);

   int has_trap_at(int bci, int reason) {

     return has_trap_at(bci_to_data(bci), reason);

   }

   int trap_recompiled_at(ciProfileData* data);

   int trap_recompiled_at(int bci) {

     return trap_recompiled_at(bci_to_data(bci));

   }

   void clear_escape_info();

   bool has_escape_info();

   void update_escape_info();

   void set_eflag(methodDataOopDesc::EscapeFlag f);

   void clear_eflag(methodDataOopDesc::EscapeFlag f);

   bool eflag_set(methodDataOopDesc::EscapeFlag f) const;

   void set_arg_local(int i);

   void set_arg_stack(int i);

   void set_arg_returned(int i);

   void set_arg_modified(int arg, uint val);

   bool is_arg_local(int i) const;

   bool is_arg_stack(int i) const;

   bool is_arg_returned(int i) const;

   uint arg_modified(int arg) const;

   // Code generation helper

   ByteSize offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data);

   int      byte_offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { return in_bytes(offset_of_slot(data, slot_offset_in_data)); }

 #ifndef PRODUCT

   // printing support for method data

   void print();

   void print_data_on(outputStream* st);

 #endif

 };

 #endif // SHARE_VM_CI_CIMETHODDATA_HPP