jdk8-mips64-public/hotspot: src/share/vm/prims/methodHandleWalk.hpp@c18cbe5936b8 (annotated)

src/share/vm/prims/methodHandleWalk.hpp@c18cbe5936b8 (annotated)

src/share/vm/prims/methodHandleWalk.hpp

Thu, 27 May 2010 19:08:38 -0700

author: trims
date: Thu, 27 May 2010 19:08:38 -0700
changeset 1907: c18cbe5936b8
parent 1587: cd37471eaecc
child 2314: f95d63e2154a
permissions: -rw-r--r--

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

 /*
  * Copyright (c) 2008, 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.
  *
  */
 // Low-level parser for method handle chains.
 class MethodHandleChain : StackObj {
 public:
   typedef MethodHandles::EntryKind EntryKind;
 private:
   Handle        _root;          // original target
   Handle        _method_handle; // current target
   bool          _is_last;       // final guy in chain
   bool          _is_bound;      // has a bound argument
   BasicType     _arg_type;      // if is_bound, the bound argument type
   int           _arg_slot;      // if is_bound or is_adapter, affected argument slot
   jint          _conversion;    // conversion field of AMH or -1
   methodHandle  _last_method;   // if is_last, which method we target
   Bytecodes::Code _last_invoke; // if is_last, type of invoke
   const char*   _lose_message;  // saved argument to lose()
   void set_method_handle(Handle target, TRAPS);
   void set_last_method(oop target, TRAPS);
   static BasicType compute_bound_arg_type(oop target, methodOop m, int arg_slot, TRAPS);
   oop MethodHandle_type_oop()     { return java_dyn_MethodHandle::type(method_handle_oop()); }
   oop MethodHandle_vmtarget_oop() { return java_dyn_MethodHandle::vmtarget(method_handle_oop()); }
   int MethodHandle_vmslots()      { return java_dyn_MethodHandle::vmslots(method_handle_oop()); }
   int DirectMethodHandle_vmindex()     { return sun_dyn_DirectMethodHandle::vmindex(method_handle_oop()); }
   oop BoundMethodHandle_argument_oop() { return sun_dyn_BoundMethodHandle::argument(method_handle_oop()); }
   int BoundMethodHandle_vmargslot()    { return sun_dyn_BoundMethodHandle::vmargslot(method_handle_oop()); }
   int AdapterMethodHandle_conversion() { return sun_dyn_AdapterMethodHandle::conversion(method_handle_oop()); }
 public:
   MethodHandleChain(Handle root, TRAPS)
     : _root(root)
   { set_method_handle(root, THREAD); }
   bool is_adapter()             { return _conversion != -1; }
   bool is_bound()               { return _is_bound; }
   bool is_last()                { return _is_last; }
   void next(TRAPS) {
     assert(!is_last(), "");
     set_method_handle(MethodHandle_vmtarget_oop(), THREAD);
   }
   Handle method_handle()        { return _method_handle; }
   oop    method_handle_oop()    { return _method_handle(); }
   oop    method_type_oop()      { return MethodHandle_type_oop(); }
   oop    vmtarget_oop()         { return MethodHandle_vmtarget_oop(); }
   jint adapter_conversion()     { assert(is_adapter(), ""); return _conversion; }
   int  adapter_conversion_op()  { return MethodHandles::adapter_conversion_op(adapter_conversion()); }
   BasicType adapter_conversion_src_type()
                                 { return MethodHandles::adapter_conversion_src_type(adapter_conversion()); }
   BasicType adapter_conversion_dest_type()
                                 { return MethodHandles::adapter_conversion_dest_type(adapter_conversion()); }
   int  adapter_conversion_stack_move()
                                 { return MethodHandles::adapter_conversion_stack_move(adapter_conversion()); }
   int  adapter_conversion_stack_pushes()
                                 { return adapter_conversion_stack_move() / MethodHandles::stack_move_unit(); }
   int  adapter_conversion_vminfo()
                                 { return MethodHandles::adapter_conversion_vminfo(adapter_conversion()); }
   int adapter_arg_slot()        { assert(is_adapter(), ""); return _arg_slot; }
   oop adapter_arg_oop()         { assert(is_adapter(), ""); return BoundMethodHandle_argument_oop(); }
   BasicType bound_arg_type()    { assert(is_bound(), ""); return _arg_type; }
   int       bound_arg_slot()    { assert(is_bound(), ""); return _arg_slot; }
   oop       bound_arg_oop()     { assert(is_bound(), ""); return BoundMethodHandle_argument_oop(); }
   methodOop last_method_oop()   { assert(is_last(), ""); return _last_method(); }
   Bytecodes::Code last_invoke_code() { assert(is_last(), ""); return _last_invoke; }
   void lose(const char* msg, TRAPS);
   const char* lose_message()    { return _lose_message; }
 };
 // Structure walker for method handles.
 // Does abstract interpretation on top of low-level parsing.
 // You supply the tokens shuffled by the abstract interpretation.
 class MethodHandleWalker : StackObj {
 public:
   // Stack values:
   enum TokenType {
     tt_void,
     tt_parameter,
     tt_temporary,
     tt_constant,
     tt_illegal
   };
   // Argument token:
   class ArgToken {
   private:
     TokenType _tt;
     BasicType _bt;
     jvalue    _value;
     Handle    _handle;
   public:
     ArgToken(TokenType tt = tt_illegal) : _tt(tt) {}
     ArgToken(TokenType tt, BasicType bt, jvalue value) : _tt(tt), _bt(bt), _value(value) {}
     ArgToken(TokenType tt, BasicType bt, int index) : _tt(tt), _bt(bt) {
       _value.i = index;
     }
     ArgToken(TokenType tt, BasicType bt, Handle value) : _tt(tt), _bt(bt) {
       _handle = value;
     }
     TokenType token_type()  const { return _tt; }
     BasicType basic_type()  const { return _bt; }
     int       index()       const { return _value.i; }
     Handle    object()      const { return _handle; }
     jint      get_jint()    const { return _value.i; }
     jlong     get_jlong()   const { return _value.j; }
     jfloat    get_jfloat()  const { return _value.f; }
     jdouble   get_jdouble() const { return _value.d; }
   };
   // Abstract interpretation state:
   struct SlotState {
     BasicType _type;
     ArgToken  _arg;
     SlotState() : _type(), _arg() {}
   };
   static SlotState make_state(BasicType type, ArgToken arg) {
     SlotState ss;
     ss._type = type; ss._arg = arg;
     return ss;
   }
 private:
   MethodHandleChain _chain;
   bool              _for_invokedynamic;
   int               _local_index;
   GrowableArray<SlotState> _outgoing;       // current outgoing parameter slots
   int                      _outgoing_argc;  // # non-empty outgoing slots
   // Replace a value of type old_type at slot (and maybe slot+1) with the new value.
   // If old_type != T_VOID, remove the old argument at that point.
   // If new_type != T_VOID, insert the new argument at that point.
   // Insert or delete a second empty slot as needed.
   void change_argument(BasicType old_type, int slot, BasicType new_type, const ArgToken& new_arg);
   SlotState* slot_state(int slot) {
     if (slot < 0 || slot >= _outgoing.length())
       return NULL;
     return _outgoing.adr_at(slot);
   }
   BasicType slot_type(int slot) {
     SlotState* ss = slot_state(slot);
     if (ss == NULL)
       return T_ILLEGAL;
     return ss->_type;
   }
   bool slot_has_argument(int slot) {
     return slot_type(slot) < T_VOID;
   }
 #ifdef ASSERT
   int argument_count_slow();
 #endif
   // Return a bytecode for converting src to dest, if one exists.
   Bytecodes::Code conversion_code(BasicType src, BasicType dest);
   void walk_incoming_state(TRAPS);
 public:
   MethodHandleWalker(Handle root, bool for_invokedynamic, TRAPS)
     : _chain(root, THREAD),
       _for_invokedynamic(for_invokedynamic),
       _outgoing(THREAD, 10),
       _outgoing_argc(0)
   {
     _local_index = for_invokedynamic ? 0 : 1;
   }
   MethodHandleChain& chain() { return _chain; }
   bool for_invokedynamic() const { return _for_invokedynamic; }
   int new_local_index(BasicType bt) {
     //int index = _for_invokedynamic ? _local_index : _local_index - 1;
     int index = _local_index;
     _local_index += type2size[bt];
     return index;
   }
   int max_locals() const { return _local_index; }
   // plug-in abstract interpretation steps:
   virtual ArgToken make_parameter( BasicType type, klassOop tk, int argnum, TRAPS ) = 0;
   virtual ArgToken make_prim_constant( BasicType type, jvalue* con, TRAPS ) = 0;
   virtual ArgToken make_oop_constant( oop con, TRAPS ) = 0;
   virtual ArgToken make_conversion( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS ) = 0;
   virtual ArgToken make_fetch( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS ) = 0;
   virtual ArgToken make_invoke( methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS ) = 0;
   // For make_invoke, the methodOop can be NULL if the intrinsic ID
   // is something other than vmIntrinsics::_none.
   // and in case anyone cares to related the previous actions to the chain:
   virtual void set_method_handle(oop mh) { }
   void lose(const char* msg, TRAPS) { chain().lose(msg, THREAD); }
   const char* lose_message()        { return chain().lose_message(); }
   ArgToken walk(TRAPS);
 };
 // An abstract interpreter for method handle chains.
 // Produces an account of the semantics of a chain, in terms of a static IR.
 // The IR happens to be JVM bytecodes.
 class MethodHandleCompiler : public MethodHandleWalker {
 private:
   methodHandle _callee;
   KlassHandle  _rklass;        // Return type for casting.
   BasicType    _rtype;
   KlassHandle  _target_klass;
   Thread*      _thread;
   // Fake constant pool entry.
   class ConstantValue {
   private:
     int       _tag;   // Constant pool tag type.
     JavaValue _value;
     Handle    _handle;
   public:
     // Constructor for oop types.
     ConstantValue(int tag, Handle con) : _tag(tag), _handle(con) {
       assert(tag == JVM_CONSTANT_Utf8   ||
              tag == JVM_CONSTANT_Class  ||
              tag == JVM_CONSTANT_String ||
              tag == JVM_CONSTANT_Object, "must be oop type");
     }
     // Constructor for oop reference types.
     ConstantValue(int tag, int index) : _tag(tag) {
       assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type");
       _value.set_jint(index);
     }
     ConstantValue(int tag, int first_index, int second_index) : _tag(tag) {
       assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type");
       _value.set_jint(first_index << 16 | second_index);
     }
     // Constructor for primitive types.
     ConstantValue(BasicType bt, jvalue con) {
       _value.set_type(bt);
       switch (bt) {
       case T_INT:    _tag = JVM_CONSTANT_Integer; _value.set_jint(   con.i); break;
       case T_LONG:   _tag = JVM_CONSTANT_Long;    _value.set_jlong(  con.j); break;
       case T_FLOAT:  _tag = JVM_CONSTANT_Float;   _value.set_jfloat( con.f); break;
       case T_DOUBLE: _tag = JVM_CONSTANT_Double;  _value.set_jdouble(con.d); break;
       default: ShouldNotReachHere();
       }
     }
     int       tag()          const { return _tag; }
     symbolOop symbol_oop()   const { return (symbolOop) _handle(); }
     klassOop  klass_oop()    const { return (klassOop)  _handle(); }
     oop       object_oop()   const { return _handle(); }
     int       index()        const { return _value.get_jint(); }
     int       first_index()  const { return _value.get_jint() >> 16; }
     int       second_index() const { return _value.get_jint() & 0x0000FFFF; }
     bool      is_primitive() const { return is_java_primitive(_value.get_type()); }
     jint      get_jint()     const { return _value.get_jint();    }
     jlong     get_jlong()    const { return _value.get_jlong();   }
     jfloat    get_jfloat()   const { return _value.get_jfloat();  }
     jdouble   get_jdouble()  const { return _value.get_jdouble(); }
   };
   // Fake constant pool.
   GrowableArray<ConstantValue*> _constants;
   // Accumulated compiler state:
   GrowableArray<unsigned char> _bytecode;
   int _cur_stack;
   int _max_stack;
   int _num_params;
   int _name_index;
   int _signature_index;
   void stack_push(BasicType bt) {
     _cur_stack += type2size[bt];
     if (_cur_stack > _max_stack) _max_stack = _cur_stack;
   }
   void stack_pop(BasicType bt) {
     _cur_stack -= type2size[bt];
     assert(_cur_stack >= 0, "sanity");
   }
   unsigned char* bytecode()        const { return _bytecode.adr_at(0); }
   int            bytecode_length() const { return _bytecode.length(); }
   // Fake constant pool.
   int cpool_oop_put(int tag, Handle con) {
     if (con.is_null())  return 0;
     ConstantValue* cv = new ConstantValue(tag, con);
     return _constants.append(cv);
   }
   int cpool_oop_reference_put(int tag, int first_index, int second_index) {
     if (first_index == 0 && second_index == 0)  return 0;
     assert(first_index != 0 && second_index != 0, "no zero indexes");
     ConstantValue* cv = new ConstantValue(tag, first_index, second_index);
     return _constants.append(cv);
   }
   int cpool_primitive_put(BasicType type, jvalue* con);
   int cpool_int_put(jint value) {
     jvalue con; con.i = value;
     return cpool_primitive_put(T_INT, &con);
   }
   int cpool_long_put(jlong value) {
     jvalue con; con.j = value;
     return cpool_primitive_put(T_LONG, &con);
   }
   int cpool_float_put(jfloat value) {
     jvalue con; con.f = value;
     return cpool_primitive_put(T_FLOAT, &con);
   }
   int cpool_double_put(jdouble value) {
     jvalue con; con.d = value;
     return cpool_primitive_put(T_DOUBLE, &con);
   }
   int cpool_object_put(Handle obj) {
     return cpool_oop_put(JVM_CONSTANT_Object, obj);
   }
   int cpool_symbol_put(symbolOop sym) {
     return cpool_oop_put(JVM_CONSTANT_Utf8, sym);
   }
   int cpool_klass_put(klassOop klass) {
     return cpool_oop_put(JVM_CONSTANT_Class, klass);
   }
   int cpool_methodref_put(int class_index, int name_and_type_index) {
     return cpool_oop_reference_put(JVM_CONSTANT_Methodref, class_index, name_and_type_index);
   }
   int cpool_name_and_type_put(int name_index, int signature_index) {
     return cpool_oop_reference_put(JVM_CONSTANT_NameAndType, name_index, signature_index);
   }
   void emit_bc(Bytecodes::Code op, int index = 0);
   void emit_load(BasicType bt, int index);
   void emit_store(BasicType bt, int index);
   void emit_load_constant(ArgToken arg);
   virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
     return ArgToken(tt_parameter, type, argnum);
   }
   virtual ArgToken make_oop_constant(oop con, TRAPS) {
     Handle h(THREAD, con);
     return ArgToken(tt_constant, T_OBJECT, h);
   }
   virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
     return ArgToken(tt_constant, type, *con);
   }
   virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS);
   virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS);
   virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS);
   // Get a real constant pool.
   constantPoolHandle get_constant_pool(TRAPS) const;
   // Get a real methodOop.
   methodHandle get_method_oop(TRAPS) const;
 public:
   MethodHandleCompiler(Handle root, methodHandle call_method, bool for_invokedynamic, TRAPS);
   // Compile the given MH chain into bytecode.
   methodHandle compile(TRAPS);
   // Tests if the given class is a MH adapter holder.
   static bool klass_is_method_handle_adapter_holder(klassOop klass) {
     return (klass == SystemDictionary::MethodHandle_klass() ||
             klass == SystemDictionary::InvokeDynamic_klass());
   }
 };

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/methodHandleWalk.hpp@c18cbe5936b8 (annotated)

src/share/vm/prims/methodHandleWalk.hpp