Add test for calling into destroyed JNI env

The test calls into ExceptionCheck with a destroyed JNI env and
expects to never come back out.

Bug: 18577101
Change-Id: I96832c78d20de4a7d8a9ddf2d0636f08fc4ed9f2
diff --git a/test/136-daemon-jni-shutdown/daemon_jni_shutdown.cc b/test/136-daemon-jni-shutdown/daemon_jni_shutdown.cc
new file mode 100644
index 0000000..54879fb
--- /dev/null
+++ b/test/136-daemon-jni-shutdown/daemon_jni_shutdown.cc
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#include <iostream>
+
+#include "base/casts.h"
+#include "base/macros.h"
+#include "java_vm_ext.h"
+#include "jni_env_ext.h"
+#include "thread-inl.h"
+
+namespace art {
+namespace {
+
+static volatile std::atomic<bool> vm_was_shutdown(false);
+
+extern "C" JNIEXPORT void JNICALL Java_Main_waitAndCallIntoJniEnv(JNIEnv* env, jclass) {
+  // Wait until the runtime is shutdown.
+  while (!vm_was_shutdown.load()) {
+    usleep(1000);
+  }
+  std::cout << "About to call exception check\n";
+  env->ExceptionCheck();
+  LOG(ERROR) << "Should not be reached!";
+}
+
+// NO_RETURN does not work with extern "C" for target builds.
+extern "C" JNIEXPORT void JNICALL Java_Main_destroyJavaVMAndExit(JNIEnv* env, jclass) {
+  // Fake up the managed stack so we can detach.
+  Thread* const self = Thread::Current();
+  self->SetTopOfStack(nullptr);
+  self->SetTopOfShadowStack(nullptr);
+  JavaVM* vm = down_cast<JNIEnvExt*>(env)->vm;
+  vm->DetachCurrentThread();
+  vm->DestroyJavaVM();
+  vm_was_shutdown.store(true);
+  // Give threads some time to get stuck in ExceptionCheck.
+  usleep(1000000);
+  if (env != nullptr) {
+    // Use env != nullptr to trick noreturn.
+    exit(0);
+  }
+}
+
+}  // namespace
+}  // namespace art
diff --git a/test/136-daemon-jni-shutdown/expected.txt b/test/136-daemon-jni-shutdown/expected.txt
new file mode 100644
index 0000000..f0b6353
--- /dev/null
+++ b/test/136-daemon-jni-shutdown/expected.txt
@@ -0,0 +1,5 @@
+JNI_OnLoad called
+About to call exception check
+About to call exception check
+About to call exception check
+About to call exception check
diff --git a/test/136-daemon-jni-shutdown/info.txt b/test/136-daemon-jni-shutdown/info.txt
new file mode 100644
index 0000000..06a12df
--- /dev/null
+++ b/test/136-daemon-jni-shutdown/info.txt
@@ -0,0 +1 @@
+Test that daemon threads that call into a JNI env after the runtime is shutdown do not crash.
\ No newline at end of file
diff --git a/test/136-daemon-jni-shutdown/src/Main.java b/test/136-daemon-jni-shutdown/src/Main.java
new file mode 100644
index 0000000..6eceb75
--- /dev/null
+++ b/test/136-daemon-jni-shutdown/src/Main.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+/**
+ * Test that daemon threads that call into a JNI env after the runtime is shutdown do not crash.
+ */
+public class Main {
+
+    public final static int THREAD_COUNT = 4;
+
+    public static void main(String[] args) throws Exception {
+        System.loadLibrary(args[0]);
+
+        for (int i = 0; i < THREAD_COUNT; i++) {
+            Thread t = new Thread(new DaemonRunnable());
+            t.setDaemon(true);
+            t.start();
+        }
+        // Give threads time to start and become stuck in waitAndCallIntoJniEnv.
+        Thread.sleep(1000);
+        destroyJavaVMAndExit();
+    }
+
+    static native void waitAndCallIntoJniEnv();
+    static native void destroyJavaVMAndExit();
+
+    private static class DaemonRunnable implements Runnable {
+        public void run() {
+            for (;;) {
+                waitAndCallIntoJniEnv();
+            }
+        }
+    }
+}
diff --git a/test/Android.libarttest.mk b/test/Android.libarttest.mk
index f74a516..b922b45 100644
--- a/test/Android.libarttest.mk
+++ b/test/Android.libarttest.mk
@@ -30,6 +30,7 @@
   051-thread/thread_test.cc \
   117-nopatchoat/nopatchoat.cc \
   1337-gc-coverage/gc_coverage.cc \
+  136-daemon-jni-shutdown/daemon_jni_shutdown.cc \
   137-cfi/cfi.cc \
   139-register-natives/regnative.cc \
   141-class-unload/jni_unload.cc \