jdk8-mips64-public/hotspot: src/share/vm/interpreter/bytecode.cpp@136b78722a08 (annotated)

src/share/vm/interpreter/bytecode.cpp@136b78722a08 (annotated)

src/share/vm/interpreter/bytecode.cpp

Wed, 09 Jun 2010 18:50:45 -0700

author: jrose
date: Wed, 09 Jun 2010 18:50:45 -0700
changeset 1957: 136b78722a08
parent 1934: e9ff18c4ace7
child 2314: f95d63e2154a
permissions: -rw-r--r--

6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never

 /*
  * 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.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_bytecode.cpp.incl"
 // Implementation of Bytecode
 bool Bytecode::check_must_rewrite(Bytecodes::Code code) const {
   assert(Bytecodes::can_rewrite(code), "post-check only");
   // Some codes are conditionally rewriting.  Look closely at them.
   switch (code) {
   case Bytecodes::_aload_0:
     // Even if RewriteFrequentPairs is turned on,
     // the _aload_0 code might delay its rewrite until
     // a following _getfield rewrites itself.
     return false;
   case Bytecodes::_lookupswitch:
     return false;  // the rewrite is not done by the interpreter
   case Bytecodes::_new:
     // (Could actually look at the class here, but the profit would be small.)
     return false;  // the rewrite is not always done
   }
   // No other special cases.
   return true;
 }
 #ifdef ASSERT
 void Bytecode::assert_same_format_as(Bytecodes::Code testbc, bool is_wide) const {
   Bytecodes::Code thisbc = Bytecodes::cast(byte_at(0));
   if (thisbc == Bytecodes::_breakpoint)  return;  // let the assertion fail silently
   if (is_wide) {
     assert(thisbc == Bytecodes::_wide, "expected a wide instruction");
     thisbc = Bytecodes::cast(byte_at(1));
     if (thisbc == Bytecodes::_breakpoint)  return;
   }
   int thisflags = Bytecodes::flags(testbc, is_wide) & Bytecodes::_all_fmt_bits;
   int testflags = Bytecodes::flags(thisbc, is_wide) & Bytecodes::_all_fmt_bits;
   if (thisflags != testflags)
     tty->print_cr("assert_same_format_as(%d) failed on bc=%d%s; %d != %d",
                   (int)testbc, (int)thisbc, (is_wide?"/wide":""), testflags, thisflags);
   assert(thisflags == testflags, "expected format");
 }
 void Bytecode::assert_index_size(int size, Bytecodes::Code bc, bool is_wide) {
   int have_fmt = (Bytecodes::flags(bc, is_wide)
                   & (Bytecodes::_fmt_has_u2 | Bytecodes::_fmt_has_u4 |
                      Bytecodes::_fmt_not_simple |
                      // Not an offset field:
                      Bytecodes::_fmt_has_o));
   int need_fmt = -1;
   switch (size) {
   case 1: need_fmt = 0;                      break;
   case 2: need_fmt = Bytecodes::_fmt_has_u2; break;
   case 4: need_fmt = Bytecodes::_fmt_has_u4; break;
   }
   if (is_wide)  need_fmt |= Bytecodes::_fmt_not_simple;
   if (have_fmt != need_fmt) {
     tty->print_cr("assert_index_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt);
     assert(have_fmt == need_fmt, "assert_index_size");
   }
 }
 void Bytecode::assert_offset_size(int size, Bytecodes::Code bc, bool is_wide) {
   int have_fmt = Bytecodes::flags(bc, is_wide) & Bytecodes::_all_fmt_bits;
   int need_fmt = -1;
   switch (size) {
   case 2: need_fmt = Bytecodes::_fmt_bo2; break;
   case 4: need_fmt = Bytecodes::_fmt_bo4; break;
   }
   if (is_wide)  need_fmt |= Bytecodes::_fmt_not_simple;
   if (have_fmt != need_fmt) {
     tty->print_cr("assert_offset_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt);
     assert(have_fmt == need_fmt, "assert_offset_size");
   }
 }
 void Bytecode::assert_constant_size(int size, int where, Bytecodes::Code bc, bool is_wide) {
   int have_fmt = Bytecodes::flags(bc, is_wide) & (Bytecodes::_all_fmt_bits
                                                   // Ignore any 'i' field (for iinc):
                                                   & ~Bytecodes::_fmt_has_i);
   int need_fmt = -1;
   switch (size) {
   case 1: need_fmt = Bytecodes::_fmt_bc;                          break;
   case 2: need_fmt = Bytecodes::_fmt_bc | Bytecodes::_fmt_has_u2; break;
   }
   if (is_wide)  need_fmt |= Bytecodes::_fmt_not_simple;
   int length = is_wide ? Bytecodes::wide_length_for(bc) : Bytecodes::length_for(bc);
   if (have_fmt != need_fmt || where + size != length) {
     tty->print_cr("assert_constant_size %d @%d: bc=%d%s %d != %d", size, where, bc, (is_wide?"/wide":""), have_fmt, need_fmt);
   }
   assert(have_fmt == need_fmt, "assert_constant_size");
   assert(where + size == length, "assert_constant_size oob");
 }
 void Bytecode::assert_native_index(Bytecodes::Code bc, bool is_wide) {
   assert((Bytecodes::flags(bc, is_wide) & Bytecodes::_fmt_has_nbo) != 0, "native index");
 }
 #endif //ASSERT
 // Implementation of Bytecode_tableupswitch
 int Bytecode_tableswitch::dest_offset_at(int i) const {
   return get_Java_u4_at(aligned_offset(1 + (3 + i)*jintSize));
 }
 // Implementation of Bytecode_invoke
 void Bytecode_invoke::verify() const {
   assert(is_valid(), "check invoke");
   assert(method()->constants()->cache() != NULL, "do not call this from verifier or rewriter");
 }
 symbolOop Bytecode_member_ref::signature() const {
   constantPoolOop constants = method()->constants();
   return constants->signature_ref_at(index());
 }
 symbolOop Bytecode_member_ref::name() const {
   constantPoolOop constants = method()->constants();
   return constants->name_ref_at(index());
 }
 BasicType Bytecode_member_ref::result_type(Thread *thread) const {
   symbolHandle sh(thread, signature());
   ResultTypeFinder rts(sh);
   rts.iterate();
   return rts.type();
 }
 methodHandle Bytecode_invoke::static_target(TRAPS) {
   methodHandle m;
   KlassHandle resolved_klass;
   constantPoolHandle constants(THREAD, _method->constants());
   if (java_code() == Bytecodes::_invokedynamic) {
     LinkResolver::resolve_dynamic_method(m, resolved_klass, constants, index(), CHECK_(methodHandle()));
   } else if (java_code() != Bytecodes::_invokeinterface) {
     LinkResolver::resolve_method(m, resolved_klass, constants, index(), CHECK_(methodHandle()));
   } else {
     LinkResolver::resolve_interface_method(m, resolved_klass, constants, index(), CHECK_(methodHandle()));
   }
   return m;
 }
 int Bytecode_member_ref::index() const {
   // Note:  Rewriter::rewrite changes the Java_u2 of an invokedynamic to a native_u4,
   // at the same time it allocates per-call-site CP cache entries.
   Bytecodes::Code rawc = code();
   Bytecode* invoke = bytecode();
   if (invoke->has_index_u4(rawc))
     return invoke->get_index_u4(rawc);
   else
     return invoke->get_index_u2_cpcache(rawc);
 }
 int Bytecode_member_ref::pool_index() const {
   int index = this->index();
   DEBUG_ONLY({
       if (!bytecode()->has_index_u4(code()))
         index -= constantPoolOopDesc::CPCACHE_INDEX_TAG;
     });
   return _method->constants()->cache()->entry_at(index)->constant_pool_index();
 }
 // Implementation of Bytecode_field
 void Bytecode_field::verify() const {
   assert(is_valid(), "check field");
 }
 // Implementation of Bytecode_loadconstant
 int Bytecode_loadconstant::raw_index() const {
   Bytecode* bcp = bytecode();
   Bytecodes::Code rawc = bcp->code();
   assert(rawc != Bytecodes::_wide, "verifier prevents this");
   if (Bytecodes::java_code(rawc) == Bytecodes::_ldc)
     return bcp->get_index_u1(rawc);
   else
     return bcp->get_index_u2(rawc, false);
 }
 int Bytecode_loadconstant::pool_index() const {
   int index = raw_index();
   if (has_cache_index()) {
     return _method->constants()->cache()->entry_at(index)->constant_pool_index();
   }
   return index;
 }
 BasicType Bytecode_loadconstant::result_type() const {
   int index = pool_index();
   constantTag tag = _method->constants()->tag_at(index);
   return tag.basic_type();
 }
 oop Bytecode_loadconstant::resolve_constant(TRAPS) const {
   assert(_method.not_null(), "must supply method to resolve constant");
   int index = raw_index();
   constantPoolOop constants = _method->constants();
   if (has_cache_index()) {
     return constants->resolve_cached_constant_at(index, THREAD);
   } else {
     return constants->resolve_constant_at(index, THREAD);
   }
 }
 //------------------------------------------------------------------------------
 // Non-product code
 #ifndef PRODUCT
 void Bytecode_lookupswitch::verify() const {
   switch (Bytecodes::java_code(code())) {
     case Bytecodes::_lookupswitch:
       { int i = number_of_pairs() - 1;
         while (i-- > 0) {
           assert(pair_at(i)->match() < pair_at(i+1)->match(), "unsorted table entries");
         }
       }
       break;
     default:
       fatal("not a lookupswitch bytecode");
   }
 }
 void Bytecode_tableswitch::verify() const {
   switch (Bytecodes::java_code(code())) {
     case Bytecodes::_tableswitch:
       { int lo = low_key();
         int hi = high_key();
         assert (hi >= lo, "incorrect hi/lo values in tableswitch");
         int i  = hi - lo - 1 ;
         while (i-- > 0) {
           // no special check needed
         }
       }
       break;
     default:
       fatal("not a tableswitch bytecode");
   }
 }
 #endif

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src/share/vm/interpreter/bytecode.cpp@136b78722a08 (annotated)

src/share/vm/interpreter/bytecode.cpp