annotate src/share/vm/oops/symbolOop.cpp @ 1091:6aa7255741f3

6906727: UseCompressedOops: some card-marking fixes related to object arrays Summary: Introduced a new write_ref_array(HeapWords* start, size_t count) method that does the requisite MemRegion range calculation so (some of the) clients of the erstwhile write_ref_array(MemRegion mr) do not need to worry. This removed all external uses of array_size(), which was also simplified and made private. Asserts were added to catch other possible issues. Further, less essential, fixes stemming from this investigation are deferred to CR 6904516 (to follow shortly in hs17). Reviewed-by: kvn, coleenp, jmasa
author ysr
date Thu, 03 Dec 2009 15:01:57 -0800
parents 2a1a77d3458f
children dd57230ba8fe
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1 /*
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2 * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_symbolOop.cpp.incl"
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27
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28 bool symbolOopDesc::equals(const char* str, int len) const {
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29 int l = utf8_length();
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30 if (l != len) return false;
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31 while (l-- > 0) {
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32 if (str[l] != (char) byte_at(l))
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33 return false;
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34 }
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35 assert(l == -1, "we should be at the beginning");
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36 return true;
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37 }
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38
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39 char* symbolOopDesc::as_C_string(char* buf, int size) const {
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40 if (size > 0) {
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41 int len = MIN2(size - 1, utf8_length());
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42 for (int i = 0; i < len; i++) {
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43 buf[i] = byte_at(i);
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44 }
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45 buf[len] = '\0';
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46 }
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47 return buf;
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48 }
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49
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50 char* symbolOopDesc::as_C_string() const {
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51 int len = utf8_length();
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52 char* str = NEW_RESOURCE_ARRAY(char, len + 1);
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53 return as_C_string(str, len + 1);
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54 }
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55
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56 char* symbolOopDesc::as_C_string_flexible_buffer(Thread* t,
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57 char* buf, int size) const {
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58 char* str;
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59 int len = utf8_length();
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60 int buf_len = len + 1;
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61 if (size < buf_len) {
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62 str = NEW_RESOURCE_ARRAY(char, buf_len);
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63 } else {
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64 str = buf;
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65 }
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66 return as_C_string(str, buf_len);
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67 }
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68
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69 void symbolOopDesc::print_symbol_on(outputStream* st) {
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70 st = st ? st : tty;
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71 int length = UTF8::unicode_length((const char*)bytes(), utf8_length());
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72 const char *ptr = (const char *)bytes();
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73 jchar value;
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74 for (int index = 0; index < length; index++) {
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75 ptr = UTF8::next(ptr, &value);
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76 if (value >= 32 && value < 127 || value == '\'' || value == '\\') {
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77 st->put(value);
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78 } else {
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79 st->print("\\u%04x", value);
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80 }
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81 }
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82 }
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83
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84 jchar* symbolOopDesc::as_unicode(int& length) const {
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85 symbolOopDesc* this_ptr = (symbolOopDesc*)this;
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86 length = UTF8::unicode_length((char*)this_ptr->bytes(), utf8_length());
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87 jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
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88 if (length > 0) {
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89 UTF8::convert_to_unicode((char*)this_ptr->bytes(), result, length);
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90 }
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91 return result;
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92 }
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93
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94 const char* symbolOopDesc::as_klass_external_name(char* buf, int size) const {
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95 if (size > 0) {
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96 char* str = as_C_string(buf, size);
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97 int length = (int)strlen(str);
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98 // Turn all '/'s into '.'s (also for array klasses)
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99 for (int index = 0; index < length; index++) {
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100 if (str[index] == '/') {
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101 str[index] = '.';
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102 }
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103 }
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104 return str;
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105 } else {
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106 return buf;
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107 }
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108 }
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109
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110 const char* symbolOopDesc::as_klass_external_name() const {
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111 char* str = as_C_string();
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112 int length = (int)strlen(str);
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113 // Turn all '/'s into '.'s (also for array klasses)
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114 for (int index = 0; index < length; index++) {
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115 if (str[index] == '/') {
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116 str[index] = '.';
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117 }
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118 }
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119 return str;
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120 }