1 /*
   2  * Copyright (c) 1999, 2019, 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  */
  24 
  25 #include "precompiled.hpp"
  26 #include "ci/ciSymbol.hpp"
  27 #include "ci/ciUtilities.inline.hpp"
  28 #include "classfile/symbolTable.hpp"
  29 #include "memory/oopFactory.hpp"
  30 
  31 // ------------------------------------------------------------------
  32 // ciSymbol::ciSymbol
  33 //
  34 // Preallocated symbol variant.  Used with symbols from vmSymbols.
  35 ciSymbol::ciSymbol(Symbol* s, vmSymbols::SID sid)
  36   : _symbol(s), _sid(sid)
  37 {
  38   assert(_symbol != NULL, "adding null symbol");
  39   _symbol->increment_refcount();  // increment ref count
  40   assert(sid_ok(), "must be in vmSymbols");
  41 }
  42 
  43 // Normal case for non-famous symbols.
  44 ciSymbol::ciSymbol(Symbol* s)
  45   : _symbol(s), _sid(vmSymbols::NO_SID)
  46 {
  47   assert(_symbol != NULL, "adding null symbol");
  48   _symbol->increment_refcount();  // increment ref count
  49   assert(sid_ok(), "must not be in vmSymbols");
  50 }
  51 
  52 // ciSymbol
  53 //
  54 // This class represents a Symbol* in the HotSpot virtual
  55 // machine.
  56 
  57 // ------------------------------------------------------------------
  58 // ciSymbol::as_utf8
  59 //
  60 // The text of the symbol as a null-terminated C string.
  61 const char* ciSymbol::as_utf8() {
  62   GUARDED_VM_QUICK_ENTRY(return get_symbol()->as_utf8();)
  63 }
  64 
  65 // The text of the symbol as a null-terminated C string.
  66 const char* ciSymbol::as_quoted_ascii() {
  67   GUARDED_VM_QUICK_ENTRY(return get_symbol()->as_quoted_ascii();)
  68 }
  69 
  70 // ------------------------------------------------------------------
  71 // ciSymbol::base
  72 const u1* ciSymbol::base() {
  73   GUARDED_VM_ENTRY(return get_symbol()->base();)
  74 }
  75 
  76 // ------------------------------------------------------------------
  77 // ciSymbol::char_at
  78 char ciSymbol::char_at(int i) {
  79   GUARDED_VM_ENTRY(return get_symbol()->char_at(i);)
  80 }
  81 
  82 // ------------------------------------------------------------------
  83 // ciSymbol::starts_with
  84 //
  85 // Tests if the symbol starts with the given prefix.
  86 bool ciSymbol::starts_with(const char* prefix, int len) const {
  87   GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix, len);)
  88 }
  89 bool ciSymbol::starts_with(char prefix_char) const {
  90   GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix_char);)
  91 }
  92 
  93 // ------------------------------------------------------------------
  94 // ciSymbol::ends_with
  95 //
  96 // Tests if the symbol ends with the given suffix.
  97 bool ciSymbol::ends_with(const char* suffix, int len) const {
  98   GUARDED_VM_ENTRY(return get_symbol()->ends_with(suffix, len);)
  99 }
 100 bool ciSymbol::ends_with(char suffix_char) const {
 101   GUARDED_VM_ENTRY(return get_symbol()->ends_with(suffix_char);)
 102 }
 103 
 104 bool ciSymbol::is_signature_polymorphic_name()  const {
 105   GUARDED_VM_ENTRY(return MethodHandles::is_signature_polymorphic_name(get_symbol());)
 106 }
 107 
 108 // ------------------------------------------------------------------
 109 // ciSymbol::index_of
 110 //
 111 // Determines where the symbol contains the given substring.
 112 int ciSymbol::index_of_at(int i, const char* str, int len) const {
 113   GUARDED_VM_ENTRY(return get_symbol()->index_of_at(i, str, len);)
 114 }
 115 
 116 // ------------------------------------------------------------------
 117 // ciSymbol::utf8_length
 118 int ciSymbol::utf8_length() {
 119   GUARDED_VM_ENTRY(return get_symbol()->utf8_length();)
 120 }
 121 
 122 // ------------------------------------------------------------------
 123 // ciSymbol::is_Q_signature
 124 bool ciSymbol::is_Q_signature() {
 125   GUARDED_VM_ENTRY(return get_symbol()->is_Q_signature();)
 126 }
 127 
 128 // ------------------------------------------------------------------
 129 // ciSymbol::print_impl
 130 //
 131 // Implementation of the print method
 132 void ciSymbol::print_impl(outputStream* st) {
 133   st->print(" value=");
 134   print_symbol_on(st);
 135 }
 136 
 137 // ------------------------------------------------------------------
 138 // ciSymbol::print_symbol_on
 139 //
 140 // Print the value of this symbol on an outputStream
 141 void ciSymbol::print_symbol_on(outputStream *st) {
 142   GUARDED_VM_ENTRY(get_symbol()->print_symbol_on(st);)
 143 }
 144 
 145 const char* ciSymbol::as_klass_external_name() const {
 146   GUARDED_VM_ENTRY(return get_symbol()->as_klass_external_name(););
 147 }
 148 
 149 // ------------------------------------------------------------------
 150 // ciSymbol::make_impl
 151 //
 152 // Make a ciSymbol from a C string (implementation).
 153 ciSymbol* ciSymbol::make_impl(const char* s) {
 154   EXCEPTION_CONTEXT;
 155   TempNewSymbol sym = SymbolTable::new_symbol(s);
 156   return CURRENT_THREAD_ENV->get_symbol(sym);
 157 }
 158 
 159 // ------------------------------------------------------------------
 160 // ciSymbol::make
 161 //
 162 // Make a ciSymbol from a C string.
 163 ciSymbol* ciSymbol::make(const char* s) {
 164   GUARDED_VM_ENTRY(return make_impl(s);)
 165 }