ciSymbol.cpp revision 3718:b9a9ed0f8eeb 
1/*
2 * Copyright (c) 1999, 2012, 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.hpp"
28#include "memory/oopFactory.hpp"
29
30// ------------------------------------------------------------------
31// ciSymbol::ciSymbol
32//
33// Preallocated symbol variant.  Used with symbols from vmSymbols.
34ciSymbol::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}
41
42// Normal case for non-famous symbols.
43ciSymbol::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}
50
51// ciSymbol
52//
53// This class represents a Symbol* in the HotSpot virtual
54// machine.
55
56// ------------------------------------------------------------------
57// ciSymbol::as_utf8
58//
59// The text of the symbol as a null-terminated C string.
60const char* ciSymbol::as_utf8() {
61  VM_QUICK_ENTRY_MARK;
62  Symbol* s = get_symbol();
63  return s->as_utf8();
64}
65
66// ------------------------------------------------------------------
67// ciSymbol::base
68const jbyte* ciSymbol::base() {
69  GUARDED_VM_ENTRY(return get_symbol()->base();)
70}
71
72// ------------------------------------------------------------------
73// ciSymbol::byte_at
74int ciSymbol::byte_at(int i) {
75  GUARDED_VM_ENTRY(return get_symbol()->byte_at(i);)
76}
77
78// ------------------------------------------------------------------
79// ciSymbol::starts_with
80//
81// Tests if the symbol starts with the given prefix.
82bool ciSymbol::starts_with(const char* prefix, int len) const {
83  GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix, len);)
84}
85
86bool ciSymbol::is_signature_polymorphic_name()  const {
87  GUARDED_VM_ENTRY(return MethodHandles::is_signature_polymorphic_name(get_symbol());)
88}
89
90// ------------------------------------------------------------------
91// ciSymbol::index_of
92//
93// Determines where the symbol contains the given substring.
94int ciSymbol::index_of_at(int i, const char* str, int len) const {
95  GUARDED_VM_ENTRY(return get_symbol()->index_of_at(i, str, len);)
96}
97
98// ------------------------------------------------------------------
99// ciSymbol::utf8_length
100int ciSymbol::utf8_length() {
101  GUARDED_VM_ENTRY(return get_symbol()->utf8_length();)
102}
103
104// ------------------------------------------------------------------
105// ciSymbol::print_impl
106//
107// Implementation of the print method
108void ciSymbol::print_impl(outputStream* st) {
109  st->print(" value=");
110  print_symbol_on(st);
111}
112
113// ------------------------------------------------------------------
114// ciSymbol::print_symbol_on
115//
116// Print the value of this symbol on an outputStream
117void ciSymbol::print_symbol_on(outputStream *st) {
118  GUARDED_VM_ENTRY(get_symbol()->print_symbol_on(st);)
119}
120
121// ------------------------------------------------------------------
122// ciSymbol::make_impl
123//
124// Make a ciSymbol from a C string (implementation).
125ciSymbol* ciSymbol::make_impl(const char* s) {
126  EXCEPTION_CONTEXT;
127  TempNewSymbol sym = SymbolTable::new_symbol(s, THREAD);
128  if (HAS_PENDING_EXCEPTION) {
129    CLEAR_PENDING_EXCEPTION;
130    CURRENT_THREAD_ENV->record_out_of_memory_failure();
131    return ciEnv::_unloaded_cisymbol;
132  }
133  return CURRENT_THREAD_ENV->get_symbol(sym);
134}
135
136// ------------------------------------------------------------------
137// ciSymbol::make
138//
139// Make a ciSymbol from a C string.
140ciSymbol* ciSymbol::make(const char* s) {
141  GUARDED_VM_ENTRY(return make_impl(s);)
142}
143