jdk8-mips64-public/hotspot: src/share/vm/ci/ciSignature.cpp@3582bf76420e

6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank

     1 /*

     2  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "ci/ciSignature.hpp"

    27 #include "ci/ciUtilities.hpp"

    28 #include "memory/allocation.inline.hpp"

    29 #include "oops/oop.inline.hpp"

    30 #include "runtime/signature.hpp"

    32 // ciSignature

    33 //

    34 // This class represents the signature of a method.

    36 // ------------------------------------------------------------------

    37 // ciSignature::ciSignature

    38 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol) {

    39   ASSERT_IN_VM;

    40   EXCEPTION_CONTEXT;

    41   _accessing_klass = accessing_klass;

    42   _symbol = symbol;

    44   ciEnv* env = CURRENT_ENV;

    45   Arena* arena = env->arena();

    46   _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);

    48   int size = 0;

    49   int count = 0;

    50   ResourceMark rm(THREAD);

    51   Symbol* sh = symbol->get_symbol();

    52   SignatureStream ss(sh);

    53   for (; ; ss.next()) {

    54     // Process one element of the signature

    55     ciType* type;

    56     if (!ss.is_object()) {

    57       type = ciType::make(ss.type());

    58     } else {

    59       Symbol* name = ss.as_symbol(THREAD);

    60       if (HAS_PENDING_EXCEPTION) {

    61         type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()

    62           : (ciType*)ciEnv::unloaded_ciinstance_klass();

    63         env->record_out_of_memory_failure();

    64         CLEAR_PENDING_EXCEPTION;

    65       } else {

    66         ciSymbol* klass_name = env->get_symbol(name);

    67         type = env->get_klass_by_name_impl(_accessing_klass, klass_name, false);

    68       }

    69     }

    70     _types->append(type);

    71     if (ss.at_return_type()) {

    72       // Done processing the return type; do not add it into the count.

    73       break;

    74     }

    75     size += type->size();

    76     count++;

    77   }

    78   _size = size;

    79   _count = count;

    80 }

    82 // ------------------------------------------------------------------

    83 // ciSignature::return_ciType

    84 //

    85 // What is the return type of this signature?

    86 ciType* ciSignature::return_type() const {

    87   return _types->at(_count);

    88 }

    90 // ------------------------------------------------------------------

    91 // ciSignature::ciType_at

    92 //

    93 // What is the type of the index'th element of this

    94 // signature?

    95 ciType* ciSignature::type_at(int index) const {

    96   assert(index < _count, "out of bounds");

    97   // The first _klasses element holds the return klass.

    98   return _types->at(index);

    99 }

   101 // ------------------------------------------------------------------

   102 // ciSignature::print_signature

   103 void ciSignature::print_signature() {

   104   _symbol->print_symbol();

   105 }

   107 // ------------------------------------------------------------------

   108 // ciSignature::print

   109 void ciSignature::print() {

   110   tty->print("<ciSignature symbol=");

   111   print_signature();

   112  tty->print(" accessing_klass=");

   113   _accessing_klass->print();

   114   tty->print(" address=0x%x>", (address)this);

   115 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/ci/ciSignature.cpp@3582bf76420e

src/share/vm/ci/ciSignature.cpp