Mercurial > hg > truffle
annotate src/share/vm/oops/symbol.cpp @ 4710:41406797186b
7113012: G1: rename not-fully-young GCs as "mixed"
Summary: Renamed partially-young GCs as mixed and fully-young GCs as young. Change all external output that includes those terms (GC log and GC ergo log) as well as any comments, fields, methods, etc. The changeset also includes very minor code tidying up (added some curly brackets).
Reviewed-by: johnc, brutisso
author | tonyp |
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date | Fri, 16 Dec 2011 02:14:27 -0500 |
parents | 1d1603768966 |
children | fc9d8850ab8b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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) : _refcount(0), _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 size, int len) { |
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40 return (void *) AllocateHeap(object_size(len) * HeapWordSize, "symbol"); |
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41 } |
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42 |
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43 // ------------------------------------------------------------------ |
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44 // Symbol::equals |
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45 // |
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46 // Compares the symbol with a string of the given length. |
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47 bool Symbol::equals(const char* str, int len) const { |
0 | 48 int l = utf8_length(); |
49 if (l != len) return false; | |
50 while (l-- > 0) { | |
51 if (str[l] != (char) byte_at(l)) | |
52 return false; | |
53 } | |
54 assert(l == -1, "we should be at the beginning"); | |
55 return true; | |
56 } | |
57 | |
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58 |
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59 // ------------------------------------------------------------------ |
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60 // Symbol::starts_with |
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61 // |
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62 // Tests if the symbol starts with the specified prefix of the given |
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63 // length. |
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64 bool Symbol::starts_with(const char* prefix, int len) const { |
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65 if (len > utf8_length()) return false; |
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66 while (len-- > 0) { |
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67 if (prefix[len] != (char) byte_at(len)) |
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68 return false; |
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69 } |
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70 assert(len == -1, "we should be at the beginning"); |
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71 return true; |
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72 } |
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73 |
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74 |
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75 // ------------------------------------------------------------------ |
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76 // Symbol::index_of |
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77 // |
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78 // Finds if the given string is a substring of this symbol's utf8 bytes. |
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79 // Return -1 on failure. Otherwise return the first index where str occurs. |
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80 int Symbol::index_of_at(int i, const char* str, int len) const { |
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81 assert(i >= 0 && i <= utf8_length(), "oob"); |
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82 if (len <= 0) return 0; |
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83 char first_char = str[0]; |
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84 address bytes = (address) ((Symbol*)this)->base(); |
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85 address limit = bytes + utf8_length() - len; // inclusive limit |
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86 address scan = bytes + i; |
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87 if (scan > limit) |
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88 return -1; |
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89 for (;;) { |
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90 scan = (address) memchr(scan, first_char, (limit + 1 - scan)); |
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91 if (scan == NULL) |
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92 return -1; // not found |
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93 assert(scan >= bytes+i && scan <= limit, "scan oob"); |
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94 if (memcmp(scan, str, len) == 0) |
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95 return (int)(scan - bytes); |
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96 } |
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97 } |
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98 |
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99 |
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100 char* Symbol::as_C_string(char* buf, int size) const { |
0 | 101 if (size > 0) { |
102 int len = MIN2(size - 1, utf8_length()); | |
103 for (int i = 0; i < len; i++) { | |
104 buf[i] = byte_at(i); | |
105 } | |
106 buf[len] = '\0'; | |
107 } | |
108 return buf; | |
109 } | |
110 | |
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111 char* Symbol::as_C_string() const { |
0 | 112 int len = utf8_length(); |
113 char* str = NEW_RESOURCE_ARRAY(char, len + 1); | |
114 return as_C_string(str, len + 1); | |
115 } | |
116 | |
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117 char* Symbol::as_C_string_flexible_buffer(Thread* t, |
0 | 118 char* buf, int size) const { |
119 char* str; | |
120 int len = utf8_length(); | |
121 int buf_len = len + 1; | |
122 if (size < buf_len) { | |
123 str = NEW_RESOURCE_ARRAY(char, buf_len); | |
124 } else { | |
125 str = buf; | |
126 } | |
127 return as_C_string(str, buf_len); | |
128 } | |
129 | |
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130 void Symbol::print_symbol_on(outputStream* st) const { |
0 | 131 st = st ? st : tty; |
222 | 132 int length = UTF8::unicode_length((const char*)bytes(), utf8_length()); |
133 const char *ptr = (const char *)bytes(); | |
134 jchar value; | |
135 for (int index = 0; index < length; index++) { | |
136 ptr = UTF8::next(ptr, &value); | |
137 if (value >= 32 && value < 127 || value == '\'' || value == '\\') { | |
138 st->put(value); | |
139 } else { | |
140 st->print("\\u%04x", value); | |
141 } | |
142 } | |
0 | 143 } |
144 | |
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145 jchar* Symbol::as_unicode(int& length) const { |
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146 Symbol* this_ptr = (Symbol*)this; |
0 | 147 length = UTF8::unicode_length((char*)this_ptr->bytes(), utf8_length()); |
148 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); | |
149 if (length > 0) { | |
150 UTF8::convert_to_unicode((char*)this_ptr->bytes(), result, length); | |
151 } | |
152 return result; | |
153 } | |
154 | |
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155 const char* Symbol::as_klass_external_name(char* buf, int size) const { |
0 | 156 if (size > 0) { |
157 char* str = as_C_string(buf, size); | |
158 int length = (int)strlen(str); | |
159 // Turn all '/'s into '.'s (also for array klasses) | |
160 for (int index = 0; index < length; index++) { | |
161 if (str[index] == '/') { | |
162 str[index] = '.'; | |
163 } | |
164 } | |
165 return str; | |
166 } else { | |
167 return buf; | |
168 } | |
169 } | |
170 | |
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171 const char* Symbol::as_klass_external_name() const { |
0 | 172 char* str = as_C_string(); |
173 int length = (int)strlen(str); | |
174 // Turn all '/'s into '.'s (also for array klasses) | |
175 for (int index = 0; index < length; index++) { | |
176 if (str[index] == '/') { | |
177 str[index] = '.'; | |
178 } | |
179 } | |
180 return str; | |
181 } | |
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182 |
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183 |
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184 void Symbol::print_on(outputStream* st) const { |
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185 if (this == NULL) { |
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186 st->print_cr("NULL"); |
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187 } else { |
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188 st->print("Symbol: '"); |
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189 print_symbol_on(st); |
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190 st->print("'"); |
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191 st->print(" count %d", refcount()); |
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192 } |
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193 } |
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194 |
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195 // The print_value functions are present in all builds, to support the |
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196 // disassembler and error reporting. |
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197 void Symbol::print_value_on(outputStream* st) const { |
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198 if (this == NULL) { |
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199 st->print("NULL"); |
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200 } else { |
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201 st->print("'"); |
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202 for (int i = 0; i < utf8_length(); i++) { |
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203 st->print("%c", byte_at(i)); |
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204 } |
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205 st->print("'"); |
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206 } |
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207 } |
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208 |
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209 void Symbol::increment_refcount() { |
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210 // Only increment the refcount if positive. If negative either |
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211 // overflow has occurred or it is a permanent symbol in a read only |
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212 // shared archive. |
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213 if (_refcount >= 0) { |
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214 Atomic::inc(&_refcount); |
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215 NOT_PRODUCT(Atomic::inc(&_total_count);) |
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216 } |
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217 } |
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218 |
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219 void Symbol::decrement_refcount() { |
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220 if (_refcount >= 0) { |
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221 Atomic::dec(&_refcount); |
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222 #ifdef ASSERT |
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223 if (_refcount < 0) { |
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224 print(); |
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225 assert(false, "reference count underflow for symbol"); |
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226 } |
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227 #endif |
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228 } |
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229 } |
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230 |
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231 NOT_PRODUCT(int Symbol::_total_count = 0;) |