Mercurial > hg > truffle
annotate src/share/vm/oops/symbol.cpp @ 6027:8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
Summary: Removed the HeapRegion::_top_at_conc_mark_count field. It is no longer needed as a result of the changes for 6888336 and 7127706. Refactored the closures that finalize and verify the liveness counting data so that common functionality was placed into a base class.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Wed, 25 Apr 2012 10:23:12 -0700 |
parents | fc9d8850ab8b |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
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25 |
1972 | 26 #include "precompiled.hpp" |
27 #include "oops/oop.inline.hpp" | |
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28 #include "oops/symbol.hpp" |
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29 #include "runtime/os.hpp" |
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30 #include "memory/allocation.inline.hpp" |
0 | 31 |
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32 Symbol::Symbol(const u1* name, int length, int refcount) : _refcount(refcount), _length(length) { |
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33 _identity_hash = os::random(); |
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34 for (int i = 0; i < _length; i++) { |
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35 byte_at_put(i, name[i]); |
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36 } |
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37 } |
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38 |
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39 void* Symbol::operator new(size_t sz, int len, TRAPS) { |
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40 int alloc_size = object_size(len)*HeapWordSize; |
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41 address res = (address) AllocateHeap(alloc_size, "symbol"); |
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42 DEBUG_ONLY(set_allocation_type(res, ResourceObj::C_HEAP);) |
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43 return res; |
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44 } |
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45 |
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46 void* Symbol::operator new(size_t sz, int len, Arena* arena, TRAPS) { |
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47 int alloc_size = object_size(len)*HeapWordSize; |
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48 address res = (address)arena->Amalloc(alloc_size); |
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49 DEBUG_ONLY(set_allocation_type(res, ResourceObj::ARENA);) |
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50 return res; |
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51 } |
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52 |
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53 // ------------------------------------------------------------------ |
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54 // Symbol::equals |
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55 // |
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56 // Compares the symbol with a string of the given length. |
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57 bool Symbol::equals(const char* str, int len) const { |
0 | 58 int l = utf8_length(); |
59 if (l != len) return false; | |
60 while (l-- > 0) { | |
61 if (str[l] != (char) byte_at(l)) | |
62 return false; | |
63 } | |
64 assert(l == -1, "we should be at the beginning"); | |
65 return true; | |
66 } | |
67 | |
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68 |
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69 // ------------------------------------------------------------------ |
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70 // Symbol::starts_with |
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71 // |
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72 // Tests if the symbol starts with the specified prefix of the given |
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73 // length. |
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74 bool Symbol::starts_with(const char* prefix, int len) const { |
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75 if (len > utf8_length()) return false; |
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76 while (len-- > 0) { |
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77 if (prefix[len] != (char) byte_at(len)) |
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78 return false; |
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79 } |
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80 assert(len == -1, "we should be at the beginning"); |
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81 return true; |
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82 } |
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83 |
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84 |
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85 // ------------------------------------------------------------------ |
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86 // Symbol::index_of |
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87 // |
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88 // Finds if the given string is a substring of this symbol's utf8 bytes. |
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89 // Return -1 on failure. Otherwise return the first index where str occurs. |
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90 int Symbol::index_of_at(int i, const char* str, int len) const { |
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91 assert(i >= 0 && i <= utf8_length(), "oob"); |
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92 if (len <= 0) return 0; |
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93 char first_char = str[0]; |
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94 address bytes = (address) ((Symbol*)this)->base(); |
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95 address limit = bytes + utf8_length() - len; // inclusive limit |
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96 address scan = bytes + i; |
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97 if (scan > limit) |
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98 return -1; |
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99 for (;;) { |
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100 scan = (address) memchr(scan, first_char, (limit + 1 - scan)); |
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101 if (scan == NULL) |
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102 return -1; // not found |
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103 assert(scan >= bytes+i && scan <= limit, "scan oob"); |
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104 if (memcmp(scan, str, len) == 0) |
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105 return (int)(scan - bytes); |
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106 } |
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107 } |
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108 |
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109 |
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110 char* Symbol::as_C_string(char* buf, int size) const { |
0 | 111 if (size > 0) { |
112 int len = MIN2(size - 1, utf8_length()); | |
113 for (int i = 0; i < len; i++) { | |
114 buf[i] = byte_at(i); | |
115 } | |
116 buf[len] = '\0'; | |
117 } | |
118 return buf; | |
119 } | |
120 | |
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121 char* Symbol::as_C_string() const { |
0 | 122 int len = utf8_length(); |
123 char* str = NEW_RESOURCE_ARRAY(char, len + 1); | |
124 return as_C_string(str, len + 1); | |
125 } | |
126 | |
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127 char* Symbol::as_C_string_flexible_buffer(Thread* t, |
0 | 128 char* buf, int size) const { |
129 char* str; | |
130 int len = utf8_length(); | |
131 int buf_len = len + 1; | |
132 if (size < buf_len) { | |
133 str = NEW_RESOURCE_ARRAY(char, buf_len); | |
134 } else { | |
135 str = buf; | |
136 } | |
137 return as_C_string(str, buf_len); | |
138 } | |
139 | |
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140 void Symbol::print_symbol_on(outputStream* st) const { |
0 | 141 st = st ? st : tty; |
222 | 142 int length = UTF8::unicode_length((const char*)bytes(), utf8_length()); |
143 const char *ptr = (const char *)bytes(); | |
144 jchar value; | |
145 for (int index = 0; index < length; index++) { | |
146 ptr = UTF8::next(ptr, &value); | |
147 if (value >= 32 && value < 127 || value == '\'' || value == '\\') { | |
148 st->put(value); | |
149 } else { | |
150 st->print("\\u%04x", value); | |
151 } | |
152 } | |
0 | 153 } |
154 | |
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155 jchar* Symbol::as_unicode(int& length) const { |
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156 Symbol* this_ptr = (Symbol*)this; |
0 | 157 length = UTF8::unicode_length((char*)this_ptr->bytes(), utf8_length()); |
158 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); | |
159 if (length > 0) { | |
160 UTF8::convert_to_unicode((char*)this_ptr->bytes(), result, length); | |
161 } | |
162 return result; | |
163 } | |
164 | |
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165 const char* Symbol::as_klass_external_name(char* buf, int size) const { |
0 | 166 if (size > 0) { |
167 char* str = as_C_string(buf, size); | |
168 int length = (int)strlen(str); | |
169 // Turn all '/'s into '.'s (also for array klasses) | |
170 for (int index = 0; index < length; index++) { | |
171 if (str[index] == '/') { | |
172 str[index] = '.'; | |
173 } | |
174 } | |
175 return str; | |
176 } else { | |
177 return buf; | |
178 } | |
179 } | |
180 | |
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181 const char* Symbol::as_klass_external_name() const { |
0 | 182 char* str = as_C_string(); |
183 int length = (int)strlen(str); | |
184 // Turn all '/'s into '.'s (also for array klasses) | |
185 for (int index = 0; index < length; index++) { | |
186 if (str[index] == '/') { | |
187 str[index] = '.'; | |
188 } | |
189 } | |
190 return str; | |
191 } | |
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192 |
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193 |
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194 void Symbol::print_on(outputStream* st) const { |
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195 if (this == NULL) { |
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196 st->print_cr("NULL"); |
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197 } else { |
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198 st->print("Symbol: '"); |
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199 print_symbol_on(st); |
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200 st->print("'"); |
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201 st->print(" count %d", refcount()); |
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202 } |
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203 } |
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204 |
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205 // The print_value functions are present in all builds, to support the |
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206 // disassembler and error reporting. |
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207 void Symbol::print_value_on(outputStream* st) const { |
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208 if (this == NULL) { |
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209 st->print("NULL"); |
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210 } else { |
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211 st->print("'"); |
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212 for (int i = 0; i < utf8_length(); i++) { |
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213 st->print("%c", byte_at(i)); |
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214 } |
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215 st->print("'"); |
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216 } |
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217 } |
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218 |
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219 // SymbolTable prints this in its statistics |
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220 NOT_PRODUCT(int Symbol::_total_count = 0;) |