95 return null;
96 }
97 return charArrayToString(charArray, 0, (int) charArray.getLength());
98 }
99
100 public static String charArrayToString(TypeArray charArray, int offset, int length) {
101 if (charArray == null) {
102 return null;
103 }
104 final int limit = offset + length;
105 if (Assert.ASSERTS_ENABLED) {
106 Assert.that(offset >= 0 && limit <= charArray.getLength(), "out of bounds");
107 }
108 StringBuffer buf = new StringBuffer(length);
109 for (int i = offset; i < limit; i++) {
110 buf.append(charArray.getCharAt(i));
111 }
112 return buf.toString();
113 }
114
115 public static String stringOopToString(Oop stringOop) {
116 if (offsetField == null) {
117 InstanceKlass k = (InstanceKlass) stringOop.getKlass();
118 offsetField = (IntField) k.findField("offset", "I");
119 countField = (IntField) k.findField("count", "I");
120 valueField = (OopField) k.findField("value", "[C");
121 if (Assert.ASSERTS_ENABLED) {
122 Assert.that(offsetField != null &&
123 countField != null &&
124 valueField != null, "must find all java.lang.String fields");
125 }
126 }
127 return charArrayToString((TypeArray) valueField.getValue(stringOop),
128 offsetField.getValue(stringOop),
129 countField.getValue(stringOop));
130 }
131
132 private static void initThreadGroupFields() {
133 if (threadGroupParentField == null) {
134 SystemDictionary sysDict = VM.getVM().getSystemDictionary();
135 InstanceKlass k = sysDict.getThreadGroupKlass();
136 threadGroupParentField = (OopField) k.findField("parent", "Ljava/lang/ThreadGroup;");
137 threadGroupNameField = (OopField) k.findField("name", "Ljava/lang/String;");
138 threadGroupNThreadsField = (IntField) k.findField("nthreads", "I");
139 threadGroupThreadsField = (OopField) k.findField("threads", "[Ljava/lang/Thread;");
140 threadGroupNGroupsField = (IntField) k.findField("ngroups", "I");
141 threadGroupGroupsField = (OopField) k.findField("groups", "[Ljava/lang/ThreadGroup;");
142 if (Assert.ASSERTS_ENABLED) {
143 Assert.that(threadGroupParentField != null &&
144 threadGroupNameField != null &&
145 threadGroupNThreadsField != null &&
146 threadGroupThreadsField != null &&
147 threadGroupNGroupsField != null &&
148 threadGroupGroupsField != null, "must find all java.lang.ThreadGroup fields");
149 }
150 }
151 }
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95 return null;
96 }
97 return charArrayToString(charArray, 0, (int) charArray.getLength());
98 }
99
100 public static String charArrayToString(TypeArray charArray, int offset, int length) {
101 if (charArray == null) {
102 return null;
103 }
104 final int limit = offset + length;
105 if (Assert.ASSERTS_ENABLED) {
106 Assert.that(offset >= 0 && limit <= charArray.getLength(), "out of bounds");
107 }
108 StringBuffer buf = new StringBuffer(length);
109 for (int i = offset; i < limit; i++) {
110 buf.append(charArray.getCharAt(i));
111 }
112 return buf.toString();
113 }
114
115 public static String escapeString(String s) {
116 StringBuilder sb = null;
117 for (int index = 0; index < s.length(); index++) {
118 char value = s.charAt(index);
119 if (value >= 32 && value < 127 || value == '\'' || value == '\\') {
120 if (sb != null) {
121 sb.append(value);
122 }
123 } else {
124 if (sb == null) {
125 sb = new StringBuilder(s.length() * 2);
126 sb.append(s, 0, index);
127 }
128 sb.append("\\u");
129 if (value < 0x10) sb.append("000");
130 else if (value < 0x100) sb.append("00");
131 else if (value < 0x1000) sb.append("0");
132 sb.append(Integer.toHexString(value));
133 }
134 }
135 if (sb != null) {
136 return sb.toString();
137 }
138 return s;
139 }
140
141 public static String stringOopToString(Oop stringOop) {
142 if (offsetField == null) {
143 InstanceKlass k = (InstanceKlass) stringOop.getKlass();
144 offsetField = (IntField) k.findField("offset", "I");
145 countField = (IntField) k.findField("count", "I");
146 valueField = (OopField) k.findField("value", "[C");
147 if (Assert.ASSERTS_ENABLED) {
148 Assert.that(offsetField != null &&
149 countField != null &&
150 valueField != null, "must find all java.lang.String fields");
151 }
152 }
153 return charArrayToString((TypeArray) valueField.getValue(stringOop),
154 offsetField.getValue(stringOop),
155 countField.getValue(stringOop));
156 }
157
158 public static String stringOopToEscapedString(Oop stringOop) {
159 return escapeString(stringOopToString(stringOop));
160 }
161
162 private static void initThreadGroupFields() {
163 if (threadGroupParentField == null) {
164 SystemDictionary sysDict = VM.getVM().getSystemDictionary();
165 InstanceKlass k = sysDict.getThreadGroupKlass();
166 threadGroupParentField = (OopField) k.findField("parent", "Ljava/lang/ThreadGroup;");
167 threadGroupNameField = (OopField) k.findField("name", "Ljava/lang/String;");
168 threadGroupNThreadsField = (IntField) k.findField("nthreads", "I");
169 threadGroupThreadsField = (OopField) k.findField("threads", "[Ljava/lang/Thread;");
170 threadGroupNGroupsField = (IntField) k.findField("ngroups", "I");
171 threadGroupGroupsField = (OopField) k.findField("groups", "[Ljava/lang/ThreadGroup;");
172 if (Assert.ASSERTS_ENABLED) {
173 Assert.that(threadGroupParentField != null &&
174 threadGroupNameField != null &&
175 threadGroupNThreadsField != null &&
176 threadGroupThreadsField != null &&
177 threadGroupNGroupsField != null &&
178 threadGroupGroupsField != null, "must find all java.lang.ThreadGroup fields");
179 }
180 }
181 }
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