jdk8-mips64-public/hotspot: src/share/vm/interpreter/bytecode.hpp@e9ff18c4ace7 (annotated)

src/share/vm/interpreter/bytecode.hpp@e9ff18c4ace7 (annotated)

src/share/vm/interpreter/bytecode.hpp

Wed, 02 Jun 2010 22:45:42 -0700

author: jrose
date: Wed, 02 Jun 2010 22:45:42 -0700
changeset 1934: e9ff18c4ace7
parent 1907: c18cbe5936b8
parent 1920: ab102d5d923e
child 1957: 136b78722a08
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 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.
  *
  */
 // Base class for different kinds of abstractions working
 // relative to an objects 'this' pointer.
 class ThisRelativeObj VALUE_OBJ_CLASS_SPEC {
  public:
   // Address computation
   address addr_at            (int offset)        const     { return (address)this + offset; }
   int     byte_at            (int offset)        const     { return *(addr_at(offset)); }
   address aligned_addr_at    (int offset)        const     { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
   int     aligned_offset     (int offset)        const     { return aligned_addr_at(offset) - addr_at(0); }
   // Word access:
   int     get_Java_u2_at     (int offset)        const     { return Bytes::get_Java_u2(addr_at(offset)); }
   int     get_Java_u4_at     (int offset)        const     { return Bytes::get_Java_u4(addr_at(offset)); }
   int     get_native_u2_at   (int offset)        const     { return Bytes::get_native_u2(addr_at(offset)); }
   int     get_native_u4_at   (int offset)        const     { return Bytes::get_native_u4(addr_at(offset)); }
 };
 // The base class for different kinds of bytecode abstractions.
 // Provides the primitive operations to manipulate code relative
 // to an objects 'this' pointer.
 // FIXME: Make this a ResourceObj, include the enclosing methodOop, and cache the opcode.
 class Bytecode: public ThisRelativeObj {
  protected:
   u_char byte_at(int offset) const               { return *addr_at(offset); }
   bool check_must_rewrite(Bytecodes::Code bc) const;
  public:
   // Attributes
   address bcp() const                            { return addr_at(0); }
   int instruction_size() const                   { return Bytecodes::length_at(bcp()); }
   // Warning: Use code() with caution on live bytecode streams.  4926272
   Bytecodes::Code code() const                   { return Bytecodes::code_at(addr_at(0)); }
   Bytecodes::Code java_code() const              { return Bytecodes::java_code(code()); }
   bool must_rewrite(Bytecodes::Code code) const  { return Bytecodes::can_rewrite(code) && check_must_rewrite(code); }
   // Creation
   inline friend Bytecode* Bytecode_at(address bcp);
   // Static functions for parsing bytecodes in place.
   int get_index_u1(Bytecodes::Code bc) const {
     assert_same_format_as(bc); assert_index_size(1, bc);
     return *(jubyte*)addr_at(1);
   }
   int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const {
     assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide);
     address p = addr_at(is_wide ? 2 : 1);
     if (can_use_native_byte_order(bc, is_wide))
           return Bytes::get_native_u2(p);
     else  return Bytes::get_Java_u2(p);
   }
   int get_index_u2_cpcache(Bytecodes::Code bc) const {
     assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc);
     return Bytes::get_native_u2(addr_at(1)) DEBUG_ONLY(+ constantPoolOopDesc::CPCACHE_INDEX_TAG);
   }
   int get_index_u4(Bytecodes::Code bc) const {
     assert_same_format_as(bc); assert_index_size(4, bc);
     assert(can_use_native_byte_order(bc), "");
     return Bytes::get_native_u4(addr_at(1));
   }
   bool has_index_u4(Bytecodes::Code bc) const {
     return bc == Bytecodes::_invokedynamic;
   }
   int get_offset_s2(Bytecodes::Code bc) const {
     assert_same_format_as(bc); assert_offset_size(2, bc);
     return (jshort) Bytes::get_Java_u2(addr_at(1));
   }
   int get_offset_s4(Bytecodes::Code bc) const {
     assert_same_format_as(bc); assert_offset_size(4, bc);
     return (jint) Bytes::get_Java_u4(addr_at(1));
   }
   int get_constant_u1(int offset, Bytecodes::Code bc) const {
     assert_same_format_as(bc); assert_constant_size(1, offset, bc);
     return *(jbyte*)addr_at(offset);
   }
   int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const {
     assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide);
     return (jshort) Bytes::get_Java_u2(addr_at(offset));
   }
   // These are used locally and also from bytecode streams.
   void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN;
   static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
   static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
   static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
   static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
   static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) {
     return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/));
   }
 };
 inline Bytecode* Bytecode_at(address bcp) {
   // Warning: Use with caution on live bytecode streams.  4926272
   return (Bytecode*)bcp;
 }
 // Abstractions for lookupswitch bytecode
 class LookupswitchPair: ThisRelativeObj {
  private:
   int  _match;
   int  _offset;
  public:
   int  match() const                             { return get_Java_u4_at(0 * jintSize); }
   int  offset() const                            { return get_Java_u4_at(1 * jintSize); }
 };
 class Bytecode_lookupswitch: public Bytecode {
  public:
   void verify() const PRODUCT_RETURN;
   // Attributes
   int  default_offset() const                    { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
   int  number_of_pairs() const                   { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
   LookupswitchPair* pair_at(int i) const         { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
                                                    return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); }
   // Creation
   inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp);
 };
 inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) {
   Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp;
   debug_only(b->verify());
   return b;
 }
 class Bytecode_tableswitch: public Bytecode {
  public:
   void verify() const PRODUCT_RETURN;
   // Attributes
   int  default_offset() const                    { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
   int  low_key() const                           { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
   int  high_key() const                          { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); }
   int  dest_offset_at(int i) const;
   int  length()                                  { return high_key()-low_key()+1; }
   // Creation
   inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp);
 };
 inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) {
   Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp;
   debug_only(b->verify());
   return b;
 }
 // Abstraction for invoke_{virtual, static, interface, special}
 class Bytecode_invoke: public ResourceObj {
  protected:
   methodHandle _method;                          // method containing the bytecode
   int          _bci;                             // position of the bytecode
   Bytecode_invoke(methodHandle method, int bci)  : _method(method), _bci(bci) {}
  public:
   void verify() const;
   // Attributes
   methodHandle method() const                    { return _method; }
   int          bci() const                       { return _bci; }
   address      bcp() const                       { return _method->bcp_from(bci()); }
   int          index() const;                    // the constant pool index for the invoke
   symbolOop    name() const;                     // returns the name of the invoked method
   symbolOop    signature() const;                // returns the signature of the invoked method
   BasicType    result_type(Thread *thread) const; // returns the result type of the invoke
   Bytecodes::Code code() const                   { return Bytecodes::code_at(bcp(), _method()); }
   Bytecodes::Code adjusted_invoke_code() const   { return Bytecodes::java_code(code()); }
   methodHandle static_target(TRAPS);             // "specified" method   (from constant pool)
   // Testers
   bool is_invokeinterface() const                { return adjusted_invoke_code() == Bytecodes::_invokeinterface; }
   bool is_invokevirtual() const                  { return adjusted_invoke_code() == Bytecodes::_invokevirtual; }
   bool is_invokestatic() const                   { return adjusted_invoke_code() == Bytecodes::_invokestatic; }
   bool is_invokespecial() const                  { return adjusted_invoke_code() == Bytecodes::_invokespecial; }
   bool is_invokedynamic() const                  { return adjusted_invoke_code() == Bytecodes::_invokedynamic; }
   bool has_receiver() const                      { return !is_invokestatic() && !is_invokedynamic(); }
   bool is_valid() const                          { return is_invokeinterface() ||
                                                           is_invokevirtual()   ||
                                                           is_invokestatic()    ||
                                                           is_invokespecial()   ||
                                                           is_invokedynamic(); }
   // Creation
   inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci);
   // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke.
   inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci);
 };
 inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) {
   Bytecode_invoke* b = new Bytecode_invoke(method, bci);
   debug_only(b->verify());
   return b;
 }
 inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) {
   Bytecode_invoke* b = new Bytecode_invoke(method, bci);
   return b->is_valid() ? b : NULL;
 }
 // Abstraction for all field accesses (put/get field/static_
 class Bytecode_field: public Bytecode {
 public:
   void verify() const;
   int  index() const;
   bool is_static() const;
   // Creation
   inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp);
 };
 inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) {
   Bytecode_field* b = (Bytecode_field*)bcp;
   debug_only(b->verify());
   return b;
 }
 // Abstraction for checkcast
 class Bytecode_checkcast: public Bytecode {
  public:
   void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
   // Returns index
   long index() const   { return get_index_u2(Bytecodes::_checkcast); };
   // Creation
   inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp);
 };
 inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) {
   Bytecode_checkcast* b = (Bytecode_checkcast*)bcp;
   debug_only(b->verify());
   return b;
 }
 // Abstraction for instanceof
 class Bytecode_instanceof: public Bytecode {
  public:
   void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
   // Returns index
   long index() const   { return get_index_u2(Bytecodes::_instanceof); };
   // Creation
   inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp);
 };
 inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) {
   Bytecode_instanceof* b = (Bytecode_instanceof*)bcp;
   debug_only(b->verify());
   return b;
 }
 class Bytecode_new: public Bytecode {
  public:
   void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
   // Returns index
   long index() const   { return get_index_u2(Bytecodes::_new); };
   // Creation
   inline friend Bytecode_new* Bytecode_new_at(address bcp);
 };
 inline Bytecode_new* Bytecode_new_at(address bcp) {
   Bytecode_new* b = (Bytecode_new*)bcp;
   debug_only(b->verify());
   return b;
 }
 class Bytecode_multianewarray: public Bytecode {
  public:
   void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
   // Returns index
   long index() const   { return get_index_u2(Bytecodes::_multianewarray); };
   // Creation
   inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp);
 };
 inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) {
   Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp;
   debug_only(b->verify());
   return b;
 }
 class Bytecode_anewarray: public Bytecode {
  public:
   void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
   // Returns index
   long index() const   { return get_index_u2(Bytecodes::_anewarray); };
   // Creation
   inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp);
 };
 inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) {
   Bytecode_anewarray* b = (Bytecode_anewarray*)bcp;
   debug_only(b->verify());
   return b;
 }
 // Abstraction for ldc, ldc_w and ldc2_w
 class Bytecode_loadconstant: public Bytecode {
  public:
   void verify() const {
     Bytecodes::Code stdc = Bytecodes::java_code(code());
     assert(stdc == Bytecodes::_ldc ||
            stdc == Bytecodes::_ldc_w ||
            stdc == Bytecodes::_ldc2_w, "load constant");
   }
   int index() const;
   inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp);
 };
 inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) {
   Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp;
   debug_only(b->verify());
   return b;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/bytecode.hpp@e9ff18c4ace7 (annotated)

src/share/vm/interpreter/bytecode.hpp