blob: 35b0a50b22dd5076a6dff76d8cffd7a9f81fc893 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Copyright (C) 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.monitoring.runtime.instrumentation;
/**
* This interface describes a function that is used to sample an allocation.
*
* @author jeremymanson@google.com (Jeremy Manson)
*/
public interface Sampler {
/**
* Determines whether the object currently being allocated, with the given
* size, should be traced.
*
* <b>CAUTION: DO NOT DO ALLOCATION IN THIS METHOD WITHOUT ENSURING THAT
* THE SAMPLER WILL NOT BE INVOKED ON THE RESULTING ALLOCATION.</b>
* Otherwise, you will get an infinite regress of calls to the sampler.
*
* @param count the <code>int</code> count of how many instances are being
* allocated. -1 means a simple new to distinguish from a 1-element array. 0
* shows up as a value here sometimes; one reason is T[] toArray()-type
* methods that require an array type argument (see ArrayList.toArray() for
* example).
* @param desc the <code>String</code> descriptor of the class/primitive type
* being allocated.
* @param newObj the new <code>Object</code> whose allocation we're
* recording.
* @param size the size of the object being allocated.
*/
public void sampleAllocation(int count, String desc,
Object newObj, long size);
}
|
