jdk8-mips64-public/hotspot: src/share/vm/ci/ciSymbol.hpp@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.

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    23  */

    25 #ifndef SHARE_VM_CI_CISYMBOL_HPP

    26 #define SHARE_VM_CI_CISYMBOL_HPP

    28 #include "ci/ciObject.hpp"

    29 #include "ci/ciObjectFactory.hpp"

    30 #include "classfile/vmSymbols.hpp"

    31 #include "oops/symbol.hpp"

    33 // ciSymbol

    34 //

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

    36 // machine.

    37 class ciSymbol : public ResourceObj {

    38   Symbol* _symbol;

    39   uint _ident;

    41   CI_PACKAGE_ACCESS

    42   // These friends all make direct use of get_symbol:

    43   friend class ciEnv;

    44   friend class ciInstanceKlass;

    45   friend class ciSignature;

    46   friend class ciMethod;

    47   friend class ciObjArrayKlass;

    49 private:

    50   const vmSymbols::SID _sid;

    51   DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; } )

    53   ciSymbol(Symbol* s);  // normal case, for symbols not mentioned in vmSymbols

    54   ciSymbol(Symbol* s, vmSymbols::SID sid);   // for use with vmSymbols

    56   Symbol* get_symbol() const { return _symbol; }

    58   const char* type_string() { return "ciSymbol"; }

    60   void print_impl(outputStream* st);

    62   // This is public in Symbol* but private here, because the base can move:

    63   const jbyte* base();

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

    66   static ciSymbol* make_impl(const char* s);

    68   void set_ident(uint id) { _ident = id; }

    69 public:

    70   // A number unique to this object.

    71   uint ident() { return _ident; }

    73   // The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none.

    74   vmSymbols::SID sid() const { return _sid; }

    76   // The text of the symbol as a null-terminated utf8 string.

    77   const char* as_utf8();

    78   int         utf8_length();

    80   // Return the i-th utf8 byte, where i < utf8_length

    81   int         byte_at(int i);

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

    84   bool starts_with(const char* prefix, int len) const;

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

    87   int index_of_at(int i, const char* str, int len) const;

    89   void print_symbol_on(outputStream* st);

    90   void print_symbol() {

    91     print_symbol_on(tty);

    92   }

    94   // Make a ciSymbol from a C string.

    95   // Consider adding to vmSymbols.hpp instead of using this constructor.

    96   // (Your code will be less subject to typographical bugs.)

    97   static ciSymbol* make(const char* s);

    99 #define CI_SYMBOL_DECLARE(name, ignore_def) \

   100   static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); }

   101   VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE)

   102 #undef CI_SYMBOL_DECLARE

   104   void print() {

   105     _symbol->print();

   106   }

   108   // Are two ciSymbols equal?

   109   bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); }

   110 };

   112 #endif // SHARE_VM_CI_CISYMBOL_HPP

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