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ciSymbol.cpp 
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/*
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 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "ci/ciSymbol.hpp"
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#include "ci/ciSymbols.hpp"
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#include "ci/ciUtilities.inline.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "memory/oopFactory.hpp"
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#include "prims/methodHandles.hpp"
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// ------------------------------------------------------------------
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// ciSymbol::ciSymbol
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ciSymbol::ciSymbol(Symbol* s, vmSymbolID sid)
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  : _symbol(s), _sid(sid)
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{
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  assert(_symbol != nullptr, "adding null symbol");
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  _symbol->increment_refcount();  // increment ref count
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  assert(sid_ok(), "sid must be consistent with vmSymbols");
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}
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DEBUG_ONLY(bool ciSymbol::sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; })
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// ciSymbol
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//
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// This class represents a Symbol* in the HotSpot virtual
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// machine.
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// ------------------------------------------------------------------
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// ciSymbol::as_utf8
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//
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// The text of the symbol as a null-terminated C string.
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const char* ciSymbol::as_utf8() {
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  GUARDED_VM_QUICK_ENTRY(return get_symbol()->as_utf8();)
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}
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// The text of the symbol as a null-terminated C string.
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const char* ciSymbol::as_quoted_ascii() {
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  GUARDED_VM_QUICK_ENTRY(return get_symbol()->as_quoted_ascii();)
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}
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// ------------------------------------------------------------------
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// ciSymbol::base
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const u1* ciSymbol::base() {
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  GUARDED_VM_ENTRY(return get_symbol()->base();)
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}
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// ------------------------------------------------------------------
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// ciSymbol::char_at
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char ciSymbol::char_at(int i) {
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  GUARDED_VM_ENTRY(return get_symbol()->char_at(i);)
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}
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// ------------------------------------------------------------------
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// ciSymbol::starts_with
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//
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// Tests if the symbol starts with the given prefix.
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bool ciSymbol::starts_with(const char* prefix, int len) const {
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  GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix, len);)
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}
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bool ciSymbol::is_signature_polymorphic_name()  const {
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  GUARDED_VM_ENTRY(return MethodHandles::is_signature_polymorphic_name(get_symbol());)
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}
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// ------------------------------------------------------------------
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// ciSymbol::index_of
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//
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// Determines where the symbol contains the given substring.
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int ciSymbol::index_of_at(int i, const char* str, int len) const {
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  GUARDED_VM_ENTRY(return get_symbol()->index_of_at(i, str, len);)
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}
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// ------------------------------------------------------------------
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// ciSymbol::utf8_length
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int ciSymbol::utf8_length() {
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  GUARDED_VM_ENTRY(return get_symbol()->utf8_length();)
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}
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// ------------------------------------------------------------------
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// ciSymbol::print_impl
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//
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// Implementation of the print method
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void ciSymbol::print_impl(outputStream* st) {
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  st->print(" value=");
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  print_symbol_on(st);
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}
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// ------------------------------------------------------------------
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// ciSymbol::print_symbol_on
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//
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// Print the value of this symbol on an outputStream
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void ciSymbol::print_symbol_on(outputStream *st) {
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  GUARDED_VM_ENTRY(get_symbol()->print_symbol_on(st);)
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}
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const char* ciSymbol::as_klass_external_name() const {
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  GUARDED_VM_ENTRY(return get_symbol()->as_klass_external_name(););
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}
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// ------------------------------------------------------------------
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// ciSymbol::make_impl
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//
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// Make a ciSymbol from a C string (implementation).
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ciSymbol* ciSymbol::make_impl(const char* s) {
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  EXCEPTION_CONTEXT;
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  TempNewSymbol sym = SymbolTable::new_symbol(s);
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  return CURRENT_THREAD_ENV->get_symbol(sym);
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}
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// ------------------------------------------------------------------
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// ciSymbol::make
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//
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// Make a ciSymbol from a C string.
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ciSymbol* ciSymbol::make(const char* s) {
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  GUARDED_VM_ENTRY(return make_impl(s);)
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}
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