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comparison agent/src/share/classes/sun/jvm/hotspot/tools/PermStat.java @ 4061:e3e363b2bf19

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7108242: jinfo -permstat shouldn't report interned strings as part of perm Reviewed-by: kvn, twisti
author never
date Tue, 08 Nov 2011 20:42:26 -0800
parents c18cbe5936b8
children da91efe96a93
comparison
equal deleted inserted replaced
4060:c9a03402fe56 4061:e3e363b2bf19
61 long classSize; 61 long classSize;
62 List classDetail = new ArrayList(); // List<ClassData> 62 List classDetail = new ArrayList(); // List<ClassData>
63 } 63 }
64 64
65 public void run() { 65 public void run() {
66 printInternStringStatistics();
67 printClassLoaderStatistics(); 66 printClassLoaderStatistics();
68 }
69
70 private void printInternStringStatistics() {
71 class StringStat implements StringTable.StringVisitor {
72 private int count;
73 private long size;
74 private OopField stringValueField;
75
76 StringStat() {
77 VM vm = VM.getVM();
78 SystemDictionary sysDict = vm.getSystemDictionary();
79 InstanceKlass strKlass = sysDict.getStringKlass();
80 // String has a field named 'value' of type 'char[]'.
81 stringValueField = (OopField) strKlass.findField("value", "[C");
82 }
83
84 private long stringSize(Instance instance) {
85 // We include String content in size calculation.
86 return instance.getObjectSize() +
87 stringValueField.getValue(instance).getObjectSize();
88 }
89
90 public void visit(Instance str) {
91 count++;
92 size += stringSize(str);
93 }
94
95 public void print() {
96 System.out.println(count +
97 " intern Strings occupying " + size + " bytes.");
98 }
99 }
100
101 StringStat stat = new StringStat();
102 StringTable strTable = VM.getVM().getStringTable();
103 strTable.stringsDo(stat);
104 stat.print();
105 } 67 }
106 68
107 private void printClassLoaderStatistics() { 69 private void printClassLoaderStatistics() {
108 final PrintStream out = System.out; 70 final PrintStream out = System.out;
109 final PrintStream err = System.err; 71 final PrintStream err = System.err;