jdk8-mips64-public/hotspot: src/share/vm/ci/ciSymbol.cpp@5eb9169b1a14

7092712: JSR 292: unloaded invokedynamic call sites can lead to a crash with signature types not on BCP
Reviewed-by: jrose, never

     1 /*

     2  * Copyright (c) 1999, 2011, 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/ciSymbol.hpp"

    27 #include "ci/ciUtilities.hpp"

    28 #include "memory/oopFactory.hpp"

    30 // ------------------------------------------------------------------

    31 // ciSymbol::ciSymbol

    32 //

    33 // Preallocated symbol variant.  Used with symbols from vmSymbols.

    34 ciSymbol::ciSymbol(Symbol* s, vmSymbols::SID sid)

    35   : _symbol(s), _sid(sid)

    36 {

    37   assert(_symbol != NULL, "adding null symbol");

    38   _symbol->increment_refcount();  // increment ref count

    39   assert(sid_ok(), "must be in vmSymbols");

    40 }

    42 // Normal case for non-famous symbols.

    43 ciSymbol::ciSymbol(Symbol* s)

    44   : _symbol(s), _sid(vmSymbols::NO_SID)

    45 {

    46   assert(_symbol != NULL, "adding null symbol");

    47   _symbol->increment_refcount();  // increment ref count

    48   assert(sid_ok(), "must not be in vmSymbols");

    49 }

    51 // ciSymbol

    52 //

    53 // This class represents a Symbol* in the HotSpot virtual

    54 // machine.

    56 // ------------------------------------------------------------------

    57 // ciSymbol::as_utf8

    58 //

    59 // The text of the symbol as a null-terminated C string.

    60 const char* ciSymbol::as_utf8() {

    61   VM_QUICK_ENTRY_MARK;

    62   Symbol* s = get_symbol();

    63   return s->as_utf8();

    64 }

    66 // ------------------------------------------------------------------

    67 // ciSymbol::base

    68 const jbyte* ciSymbol::base() {

    69   GUARDED_VM_ENTRY(return get_symbol()->base();)

    70 }

    72 // ------------------------------------------------------------------

    73 // ciSymbol::byte_at

    74 int ciSymbol::byte_at(int i) {

    75   GUARDED_VM_ENTRY(return get_symbol()->byte_at(i);)

    76 }

    78 // ------------------------------------------------------------------

    79 // ciSymbol::starts_with

    80 //

    81 // Tests if the symbol starts with the given prefix.

    82 bool ciSymbol::starts_with(const char* prefix, int len) const {

    83   GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix, len);)

    84 }

    86 // ------------------------------------------------------------------

    87 // ciSymbol::index_of

    88 //

    89 // Determines where the symbol contains the given substring.

    90 int ciSymbol::index_of_at(int i, const char* str, int len) const {

    91   GUARDED_VM_ENTRY(return get_symbol()->index_of_at(i, str, len);)

    92 }

    94 // ------------------------------------------------------------------

    95 // ciSymbol::utf8_length

    96 int ciSymbol::utf8_length() {

    97   GUARDED_VM_ENTRY(return get_symbol()->utf8_length();)

    98 }

   100 // ------------------------------------------------------------------

   101 // ciSymbol::print_impl

   102 //

   103 // Implementation of the print method

   104 void ciSymbol::print_impl(outputStream* st) {

   105   st->print(" value=");

   106   print_symbol_on(st);

   107 }

   109 // ------------------------------------------------------------------

   110 // ciSymbol::print_symbol_on

   111 //

   112 // Print the value of this symbol on an outputStream

   113 void ciSymbol::print_symbol_on(outputStream *st) {

   114   GUARDED_VM_ENTRY(get_symbol()->print_symbol_on(st);)

   115 }

   117 // ------------------------------------------------------------------

   118 // ciSymbol::make_impl

   119 //

   120 // Make a ciSymbol from a C string (implementation).

   121 ciSymbol* ciSymbol::make_impl(const char* s) {

   122   EXCEPTION_CONTEXT;

   123   TempNewSymbol sym = SymbolTable::new_symbol(s, THREAD);

   124   if (HAS_PENDING_EXCEPTION) {

   125     CLEAR_PENDING_EXCEPTION;

   126     CURRENT_THREAD_ENV->record_out_of_memory_failure();

   127     return ciEnv::_unloaded_cisymbol;

   128   }

   129   return CURRENT_THREAD_ENV->get_symbol(sym);

   130 }

   132 // ------------------------------------------------------------------

   133 // ciSymbol::make

   134 //

   135 // Make a ciSymbol from a C string.

   136 ciSymbol* ciSymbol::make(const char* s) {

   137   GUARDED_VM_ENTRY(return make_impl(s);)

   138 }

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