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      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 <pthread.h>
     18 
     19 #include <cstdio>
     20 #include <iostream>
     21 #include <vector>
     22 
     23 #include "android-base/logging.h"
     24 #include "jni.h"
     25 #include "jvmti.h"
     26 
     27 #include "scoped_local_ref.h"
     28 #include "scoped_primitive_array.h"
     29 
     30 // Test infrastructure
     31 #include "jvmti_helper.h"
     32 #include "test_env.h"
     33 
     34 namespace art {
     35 namespace Test1934SignalThreads {
     36 
     37 struct NativeMonitor {
     38   jrawMonitorID continue_monitor;
     39   bool should_continue;
     40   jrawMonitorID start_monitor;
     41   bool should_start;
     42 };
     43 
     44 extern "C" JNIEXPORT jlong JNICALL Java_art_Test1934_allocNativeMonitor(JNIEnv* env, jclass) {
     45   NativeMonitor* mon;
     46   if (JvmtiErrorToException(env,
     47                             jvmti_env,
     48                             jvmti_env->Allocate(sizeof(NativeMonitor),
     49                                                 reinterpret_cast<unsigned char**>(&mon)))) {
     50     return -1L;
     51   }
     52   if (JvmtiErrorToException(env,
     53                             jvmti_env,
     54                             jvmti_env->CreateRawMonitor("test-1934 start",
     55                                                         &mon->start_monitor))) {
     56     return -1L;
     57   }
     58   if (JvmtiErrorToException(env,
     59                             jvmti_env,
     60                             jvmti_env->CreateRawMonitor("test-1934 continue",
     61                                                         &mon->continue_monitor))) {
     62     return -1L;
     63   }
     64   mon->should_continue = false;
     65   mon->should_start = false;
     66   return static_cast<jlong>(reinterpret_cast<intptr_t>(mon));
     67 }
     68 
     69 extern "C" JNIEXPORT void Java_art_Test1934_nativeWaitForOtherThread(JNIEnv* env,
     70                                                                      jclass,
     71                                                                      jlong id) {
     72   NativeMonitor* mon = reinterpret_cast<NativeMonitor*>(static_cast<intptr_t>(id));
     73   // Start
     74   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(mon->start_monitor))) {
     75     return;
     76   }
     77   mon->should_start = true;
     78   if (JvmtiErrorToException(env,
     79                             jvmti_env,
     80                             jvmti_env->RawMonitorNotifyAll(mon->start_monitor))) {
     81     JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->start_monitor));
     82     return;
     83   }
     84   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->start_monitor))) {
     85     return;
     86   }
     87 
     88   // Finish
     89   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(mon->continue_monitor))) {
     90     return;
     91   }
     92   while (!mon->should_continue) {
     93     if (JvmtiErrorToException(env,
     94                               jvmti_env,
     95                               jvmti_env->RawMonitorWait(mon->continue_monitor, -1L))) {
     96       JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->continue_monitor));
     97       return;
     98     }
     99   }
    100   JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->continue_monitor));
    101 }
    102 
    103 extern "C" JNIEXPORT void Java_art_Test1934_nativeDoInterleaved(JNIEnv* env,
    104                                                                 jclass,
    105                                                                 jlong id,
    106                                                                 jobject closure) {
    107   NativeMonitor* mon = reinterpret_cast<NativeMonitor*>(static_cast<intptr_t>(id));
    108   // Wait for start.
    109   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(mon->start_monitor))) {
    110     return;
    111   }
    112   while (!mon->should_start) {
    113     if (JvmtiErrorToException(env,
    114                               jvmti_env,
    115                               jvmti_env->RawMonitorWait(mon->start_monitor, -1L))) {
    116       return;
    117     }
    118   }
    119   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->start_monitor))) {
    120     return;
    121   }
    122 
    123   // Call closure.
    124   ScopedLocalRef<jclass> runnable_klass(env, env->FindClass("java/lang/Runnable"));
    125   if (env->ExceptionCheck()) {
    126     return;
    127   }
    128   jmethodID doRun = env->GetMethodID(runnable_klass.get(), "run", "()V");
    129   if (env->ExceptionCheck()) {
    130     return;
    131   }
    132   env->CallVoidMethod(closure, doRun);
    133 
    134   // Tell other thread to finish.
    135   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(mon->continue_monitor))) {
    136     return;
    137   }
    138   mon->should_continue = true;
    139   if (JvmtiErrorToException(env,
    140                             jvmti_env,
    141                             jvmti_env->RawMonitorNotifyAll(mon->continue_monitor))) {
    142     JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->continue_monitor));
    143     return;
    144   }
    145   JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(mon->continue_monitor));
    146 }
    147 
    148 extern "C" JNIEXPORT void Java_art_Test1934_destroyNativeMonitor(JNIEnv*, jclass, jlong id) {
    149   NativeMonitor* mon = reinterpret_cast<NativeMonitor*>(static_cast<intptr_t>(id));
    150   jvmti_env->DestroyRawMonitor(mon->start_monitor);
    151   jvmti_env->DestroyRawMonitor(mon->continue_monitor);
    152   jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(mon));
    153 }
    154 
    155 }  // namespace Test1934SignalThreads
    156 }  // namespace art
    157 
    158