1 /*
2  * Copyright (C) 2017 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 
17 #include <atomic>
18 
19 #include "android-base/logging.h"
20 #include "jni.h"
21 #include "scoped_local_ref.h"
22 #include "scoped_primitive_array.h"
23 
24 #include "jvmti.h"
25 
26 // Test infrastructure
27 #include "jvmti_helper.h"
28 #include "test_env.h"
29 
30 namespace art {
31 namespace Test1920NativeSuspendMonitor {
32 
33 std::atomic<bool> should_pause(false);
34 std::atomic<bool> paused(false);
35 std::atomic<bool> done(false);
36 std::atomic<bool> started(false);
37 
38 extern "C" JNIEXPORT void JNICALL Java_art_Test1920_nativeSpin(JNIEnv* env, jclass) {
39   jrawMonitorID mon;
40   if (JvmtiErrorToException(
41       env, jvmti_env, jvmti_env->CreateRawMonitor("Test1920 monitor", &mon))) {
42     return;
43   }
44   while (!done.load()) {
45     while (should_pause.load()) {
46       paused.store(true);
47     }
48     paused.store(false);
49     if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(mon))) {
50       return;
51     }
52     started.store(true);
53     if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon))) {
54       return;
55     }
56   }
57 }
58 
59 extern "C" JNIEXPORT jboolean JNICALL Java_art_Test1920_isNativeThreadSpinning(JNIEnv*, jclass) {
60   return started.load();
61 }
62 
63 extern "C" JNIEXPORT void JNICALL Java_art_Test1920_pause(JNIEnv*, jclass) {
64   should_pause.store(true);
65   paused.store(false);
66   while (!paused.load()) { }
67 }
68 extern "C" JNIEXPORT void JNICALL Java_art_Test1920_resume(JNIEnv*, jclass) {
69   should_pause.store(false);
70   while (paused.load()) { }
71 }
72 
73 extern "C" JNIEXPORT void JNICALL Java_art_Test1920_reset(JNIEnv*, jclass) {
74   started.store(false);
75 }
76 extern "C" JNIEXPORT void JNICALL Java_art_Test1920_nativeFinish(JNIEnv*, jclass) {
77   done.store(true);
78 }
79 
80 }  // namespace Test1920NativeSuspendMonitor
81 }  // namespace art
82