ART: Refactor test 911

Break out the different test cases. As the stack traces print line
numbers, this will reduce the amount of expected.txt churn when
new tests are added.

Bug: 31684812
Test: m test-art-host-run-test-911-get-stack-trace
Change-Id: I3b4cb80ec5dd851ebbdf25fd660038d20a9daa9e
diff --git a/test/911-get-stack-trace/src/Recurse.java b/test/911-get-stack-trace/src/Recurse.java
new file mode 100644
index 0000000..439fbaa
--- /dev/null
+++ b/test/911-get-stack-trace/src/Recurse.java
@@ -0,0 +1,58 @@
+/*
+ * 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.
+ */
+
+public class Recurse {
+  public static int foo(int x, int start, int max, ControlData data) {
+    bar(x, start, max, data);
+    return 0;
+  }
+
+  private static long bar(int x, int start, int max, ControlData data) {
+    baz(x, start, max, data);
+    return 0;
+  }
+
+  private static Object baz(int x, int start, int max, ControlData data) {
+    if (x == 0) {
+      printOrWait(start, max, data);
+    } else {
+      foo(x - 1, start, max, data);
+    }
+    return null;
+  }
+
+  private static void printOrWait(int start, int max, ControlData data) {
+    if (data == null) {
+      PrintThread.print(Thread.currentThread(), start, max);
+    } else {
+      if (data.waitFor != null) {
+        synchronized (data.waitFor) {
+          data.reached.countDown();
+          try {
+            data.waitFor.wait();  // Use wait() as it doesn't have a "hidden" Java call-graph.
+          } catch (Throwable t) {
+            throw new RuntimeException(t);
+          }
+        }
+      } else {
+        data.reached.countDown();
+        while (!data.stop) {
+          // Busy-loop.
+        }
+      }
+    }
+  }
+}
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