jdk8-mips64-public/hotspot: src/share/vm/interpreter/bytecode.hpp@c7ec737733a6 (annotated)

src/share/vm/interpreter/bytecode.hpp@c7ec737733a6 (annotated)

src/share/vm/interpreter/bytecode.hpp

Thu, 30 Oct 2008 15:48:59 -0400

author: kamg
date: Thu, 30 Oct 2008 15:48:59 -0400
changeset 848: c7ec737733a6
parent 435: a61af66fc99e
child 1161: be93aad57795
permissions: -rw-r--r--

6756528: Bytecodes::special_length_at reads past end of code buffer
Summary: Add end-of-buffer indicator for paths used by the verifier
Reviewed-by: acorn, coleenp

 /*
  * Copyright 1997-2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.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 {
  private:
   int     sign_extend        (int x, int size)   const     { const int s = (BytesPerInt - size)*BitsPerByte; return (x << s) >> s; }
  public:
   // Address computation
   address addr_at            (int offset)        const     { return (address)this + 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); }
   // Java unsigned accessors (using Java spec byte ordering)
   int     java_byte_at       (int offset)        const     { return *(jubyte*)addr_at(offset); }
   int     java_hwrd_at       (int offset)        const     { return java_byte_at(offset) << (1 * BitsPerByte) | java_byte_at(offset + 1); }
   int     java_word_at       (int offset)        const     { return java_hwrd_at(offset) << (2 * BitsPerByte) | java_hwrd_at(offset + 2); }
   // Java signed accessors (using Java spec byte ordering)
   int     java_signed_byte_at(int offset)        const     { return sign_extend(java_byte_at(offset), 1); }
   int     java_signed_hwrd_at(int offset)        const     { return sign_extend(java_hwrd_at(offset), 2); }
   int     java_signed_word_at(int offset)        const     { return             java_word_at(offset)    ; }
   // Fast accessors (using the machine's natural byte ordering)
   int     fast_byte_at       (int offset)        const     { return *(jubyte *)addr_at(offset); }
   int     fast_hwrd_at       (int offset)        const     { return *(jushort*)addr_at(offset); }
   int     fast_word_at       (int offset)        const     { return *(juint  *)addr_at(offset); }
   // Fast signed accessors (using the machine's natural byte ordering)
   int     fast_signed_byte_at(int offset)        const     { return *(jbyte *)addr_at(offset); }
   int     fast_signed_hwrd_at(int offset)        const     { return *(jshort*)addr_at(offset); }
   int     fast_signed_word_at(int offset)        const     { return *(jint  *)addr_at(offset); }
   // Fast manipulators (using the machine's natural byte ordering)
   void    set_fast_byte_at   (int offset, int x) const     { *(jbyte *)addr_at(offset) = (jbyte )x; }
   void    set_fast_hwrd_at   (int offset, int x) const     { *(jshort*)addr_at(offset) = (jshort)x; }
   void    set_fast_word_at   (int offset, int x) const     { *(jint  *)addr_at(offset) = (jint  )x; }
 };
 // The base class for different kinds of bytecode abstractions.
 // Provides the primitive operations to manipulate code relative
 // to an objects 'this' pointer.
 //
 // Note: Even though it seems that the fast_index & set_fast_index
 //       functions are machine specific, they're not. They only use
 //       the natural way to store a 16bit index on a given machine,
 //       independent of the particular byte ordering. Since all other
 //       places in the system that refer to these indices use the
 //       same method (the natural byte ordering on the platform)
 //       this will always work and be machine-independent).
 class Bytecode: public ThisRelativeObj {
  protected:
   u_char byte_at(int offset) const               { return *addr_at(offset); }
   bool check_must_rewrite() const;
  public:
   // Attributes
   address bcp() const                            { return addr_at(0); }
   address next_bcp() const                       { return addr_at(0) + Bytecodes::length_at(bcp()); }
   Bytecodes::Code code() const                   { return Bytecodes::code_at(addr_at(0)); }
   Bytecodes::Code java_code() const              { return Bytecodes::java_code(code()); }
   bool must_rewrite() const                      { return Bytecodes::can_rewrite(code()) && check_must_rewrite(); }
   bool is_active_breakpoint() const              { return Bytecodes::is_active_breakpoint_at(bcp()); }
   int     one_byte_index() const                 { return byte_at(1); }
   int     two_byte_index() const                 { return (byte_at(1) << 8) + byte_at(2); }
   int     offset() const                         { return (two_byte_index() << 16) >> 16; }
   address destination() const                    { return bcp() + offset(); }
   int     fast_index() const                     { return Bytes::get_native_u2(addr_at(1)); }
   // Attribute modification
   void    set_code(Bytecodes::Code code);
   void    set_fast_index(int i);
   // Creation
   inline friend Bytecode* Bytecode_at(address bcp);
 };
 inline Bytecode* Bytecode_at(address bcp) {
   return (Bytecode*)bcp;
 }
 // Abstractions for lookupswitch bytecode
 class LookupswitchPair: ThisRelativeObj {
  private:
   int  _match;
   int  _offset;
  public:
   int  match() const                             { return java_signed_word_at(0 * jintSize); }
   int  offset() const                            { return java_signed_word_at(1 * jintSize); }
 };
 class Bytecode_lookupswitch: public Bytecode {
  public:
   void verify() const PRODUCT_RETURN;
   // Attributes
   int  default_offset() const                    { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); }
   int  number_of_pairs() const                   { return java_signed_word_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 java_signed_word_at(aligned_offset(1 + 0*jintSize)); }
   int  low_key() const                           { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); }
   int  high_key() const                          { return java_signed_word_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_valid() const                          { return is_invokeinterface() ||
                                                           is_invokevirtual()   ||
                                                           is_invokestatic()    ||
                                                           is_invokespecial();     }
   // 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 {get,put}static
 class Bytecode_static: public Bytecode {
  public:
   void verify() const;
   // Returns the result type of the send by inspecting the field ref
   BasicType result_type(methodOop method) const;
   // Creation
   inline friend Bytecode_static* Bytecode_static_at(const methodOop method, address bcp);
 };
 inline Bytecode_static* Bytecode_static_at(const methodOop method, address bcp) {
   Bytecode_static* b = (Bytecode_static*)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 java_hwrd_at(1); };
   // 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 java_hwrd_at(1); };
   // 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 java_hwrd_at(1); };
   // 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 java_hwrd_at(1); };
   // 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 java_hwrd_at(1); };
   // 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@c7ec737733a6 (annotated)

src/share/vm/interpreter/bytecode.hpp