Main.java revision 5949fa0cb9a8d26ac20b9b02065a63b4b20443be 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17public class Main {
18  public Main() {
19  }
20
21  static int testLiveArgument(int arg) {
22    doStaticNativeCallLiveVreg();
23    return arg;
24  }
25
26  static void moveArgToCalleeSave() {
27    try {
28      Thread.sleep(0);
29    } catch (Exception e) {
30      throw new Error(e);
31    }
32  }
33
34  static void $opt$noinline$testIntervalHole(int arg, boolean test) {
35    // Move the argument to callee save to ensure it is in
36    // a readable register.
37    moveArgToCalleeSave();
38    if (test) {
39      staticField1 = arg;
40      // The environment use of `arg` should not make it live.
41      doStaticNativeCallLiveVreg();
42    } else {
43      staticField2 = arg;
44      // The environment use of `arg` should not make it live.
45      doStaticNativeCallLiveVreg();
46    }
47    if (staticField1 == 2) {
48      throw new Error("");
49    }
50  }
51
52  static native void doStaticNativeCallLiveVreg();
53
54  public static void main(String[] args) {
55    System.loadLibrary(args[0]);
56    if (testLiveArgument(staticField3) != staticField3) {
57      throw new Error("Expected " + staticField3);
58    }
59
60    if (testLiveArgument(staticField3) != staticField3) {
61      throw new Error("Expected " + staticField3);
62    }
63
64    testWrapperIntervalHole(1, true);
65    testWrapperIntervalHole(1, false);
66  }
67
68  // Wrapper method to avoid inlining, which affects liveness
69  // of dex registers.
70  static void testWrapperIntervalHole(int arg, boolean test) {
71    try {
72      Thread.sleep(0);
73      $opt$noinline$testIntervalHole(arg, test);
74    } catch (Exception e) {
75      throw new Error(e);
76    }
77  }
78
79  static int staticField1;
80  static int staticField2;
81  static int staticField3 = 42;
82}
83