blob: 8e03fe04bfbeee5f6cdbeb9409af7d81865555b2 (
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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
* Copyright (C) 2024 The Android Open Source Project
*
* 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.
*/
import dalvik.system.InMemoryDexClassLoader;
import static java.lang.invoke.MethodType.methodType;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.ref.WeakReference;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.util.Base64;
import java.util.List;
import java.util.function.Consumer;
public class Main {
// src-ex/ClassWithAMethod.java
private static final String DEX_FILE =
"ZGV4CjA0MQC4x9/g6TtIcd5240Zevdlr1D/wRBHV4Tv0BAAAeAAAAHhWNBIAAAAAAAAAADAEAAAW" +
"AAAAeAAAAAcAAADQAAAABAAAAOwAAAAAAAAAAAAAAAcAAAAcAQAAAQAAAFQBAAAAAAAAAAAAAPQE" +
"AAAAAAAAGgIAAB8CAAAnAgAAOQIAAFACAABTAgAAVgIAAGoCAACOAgAAqgIAAL4CAADfAgAA4gIA" +
"AOYCAAD5AgAABQMAABgDAAAeAwAAJgMAADQDAAA7AwAASAMAAAQAAAAGAAAABwAAAAgAAAAJAAAA" +
"CgAAAAsAAAAEAAAAAAAAAAAAAAAFAAAABQAAAAAAAAALAAAABgAAAAAAAAAMAAAABgAAABQCAAAB" +
"AAIAAQAAAAEAAQANAAAAAQAAABEAAAABAAEAEgAAAAEAAgAUAAAAAwADAAEAAAAEAAIAAQAAAAEA" +
"AAABAAAABAAAAAAAAAADAAAAGAQAAPYDAAAAAAAABAAAAAIAAAABAAAAAAAAAPwBAAACAAAAEhAP" +
"AAEAAAAAAAAAAAIAAAMAAAD+AAAAEQAAAAEAAAAAAAAABAIAAAUAAABxAAQAAAASABEAAAABAAEA" +
"AQAAAAkCAAAEAAAAcBAGAAAADgACAAAAAgAAAA0CAAAIAAAAIgADABoBFABwIAUAEAAnABoADgAs" +
"AA4AJwAOPAAYAA4AHgAOAAAAAAEAAAAEAAMoKUkABjxpbml0PgAQQ2xhc3NXaXRoQU1ldGhvZAAV" +
"Q2xhc3NXaXRoQU1ldGhvZC5qYXZhAAFJAAFMABJMQ2xhc3NXaXRoQU1ldGhvZDsAIkxhbm5vdGF0" +
"aW9ucy9Db25zdGFudE1ldGhvZEhhbmRsZTsAGkxqYXZhL2xhbmcvQXNzZXJ0aW9uRXJyb3I7ABJM" +
"amF2YS9sYW5nL09iamVjdDsAH0xqYXZhL2xhbmcvaW52b2tlL01ldGhvZEhhbmRsZTsAAVYAAlZM" +
"ABFjb25zdE1ldGhvZEhhbmRsZQAKZGVzY3JpcHRvcgARZmllbGRPck1ldGhvZE5hbWUABGtpbmQA" +
"Bm1ldGhvZAAMbWV0aG9kSGFuZGxlAAVvd25lcgALdW5yZWFjaGFibGUAnAF+fkQ4eyJiYWNrZW5k" +
"IjoiZGV4IiwiY29tcGlsYXRpb24tbW9kZSI6ImRlYnVnIiwiaGFzLWNoZWNrc3VtcyI6ZmFsc2Us" +
"Im1pbi1hcGkiOjI4LCJzaGEtMSI6IjdkZTM3N2E4MGI1MzQ1MGY1Y2ExYTNmYzUwZjZkYzk5M2U3" +
"ZThhM2UiLCJ2ZXJzaW9uIjoiOC44LjQtZGV2In0AAQIEDhcADxcREAQEExcCAAAFAACBgATEAwEJ" +
"kAMBCfwCAQqoAwEK3AMBAAAA5wMAAAAAAAAAAAAAAQAAAAAAAAADAAAAEAQAABAAAAAAAAAAAQAA" +
"AAAAAAABAAAAFgAAAHgAAAACAAAABwAAANAAAAADAAAABAAAAOwAAAAFAAAABwAAABwBAAAGAAAA" +
"AQAAAFQBAAAIAAAAAQAAAHQBAAABIAAABQAAAHwBAAADIAAABQAAAPwBAAABEAAAAQAAABQCAAAC" +
"IAAAFgAAABoCAAAEIAAAAQAAAOcDAAAAIAAAAQAAAPYDAAADEAAAAQAAABAEAAAGIAAAAQAAABgE" +
"AAAAEAAAAQAAADAEAAA=";
private static final int ITERATIONS = 5;
public static void main(String[] args) throws Throwable {
verify($noinline$getJavaApiMethodHandle());
verify($noinline$getConstMethodHandle());
}
private static void verify(MethodHandle mh) {
int result = 0;
for (int i = 0; i < ITERATIONS; ++i) {
try {
result += (int) mh.invokeWithArguments(List.of());
} catch (Throwable t) {
throw new RuntimeException(t);
}
Runtime.getRuntime().gc();
System.runFinalization();
}
if (result != ITERATIONS) {
throw new AssertionError();
}
}
private static MethodHandle $noinline$getJavaApiMethodHandle() throws Throwable {
ClassLoader loader = new InMemoryDexClassLoader(
ByteBuffer.wrap(Base64.getDecoder().decode(DEX_FILE)),
ClassLoader.getSystemClassLoader());
Class<?> clazz = loader.loadClass("ClassWithAMethod");
return MethodHandles.publicLookup().findStatic(clazz, "method", methodType(int.class));
}
private static MethodHandle $noinline$getConstMethodHandle() throws Throwable {
ClassLoader loader = new InMemoryDexClassLoader(
ByteBuffer.wrap(Base64.getDecoder().decode(DEX_FILE)),
ClassLoader.getSystemClassLoader());
Class<?> clazz = loader.loadClass("ClassWithAMethod");
return (MethodHandle) clazz.getDeclaredMethod("constMethodHandle").invoke(null);
}
}
|