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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.Instrumentation;
import java.util.Map;
import java.util.Set;
/**
* Agent used by TraceUsageTest. The premain and agentmain methods invoke Instrumentation
* methods so the usages can be traced by the test.
*/
public class TraceUsageAgent {
public static void premain(String methodNames, Instrumentation inst) throws Exception {
test(methodNames, inst);
}
public static void agentmain(String methodNames, Instrumentation inst) throws Exception {
test(methodNames, inst);
}
private static void test(String methodNames, Instrumentation inst) throws Exception {
for (String methodName : methodNames.split(",")) {
switch (methodName) {
case "addTransformer" -> {
var transformer = new ClassFileTransformer() { };
inst.addTransformer(transformer);
}
case "retransformClasses" -> {
inst.retransformClasses(Object.class);
}
case "redefineModule" -> {
Module base = Object.class.getModule();
inst.redefineModule(base, Set.of(), Map.of(), Map.of(), Set.of(), Map.of());
}
default -> {
throw new RuntimeException("Unknown method name: " + methodName);
}
}
}
}
}
|
