hotspot/test/runtime/Throwable/TestThrowable.java
changeset 37064 5c82fa70d313
child 38152 80e5da81fb2c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/Throwable/TestThrowable.java	Thu Mar 10 13:43:47 2016 -0500
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8150778
+ * @summary Test exception depths, and code to get stack traces
+ * @library /testlibrary
+ * @run main/othervm -XX:MaxJavaStackTraceDepth=1024 TestThrowable
+ */
+
+import java.lang.reflect.Field;
+import jdk.test.lib.Asserts;
+
+public class TestThrowable {
+
+  // Inner class that throws a lot of exceptions
+  static class Thrower {
+    static int MaxJavaStackTraceDepth = 1024; // as above
+    int[] depths = {10, 34, 100, 1024, 2042};
+    int count = 0;
+
+    int getDepth(Throwable t) throws Exception {
+      Field f = Throwable.class.getDeclaredField("depth");
+      f.setAccessible(true); // it's private
+      return f.getInt(t);
+    }
+
+    void callThrow(int depth) {
+      if (++count < depth) {
+        callThrow(depth);
+      } else {
+        throw new RuntimeException("depth tested " + depth);
+      }
+    }
+    void testThrow() throws Exception {
+      for (int d : depths) {
+        try {
+          count = getDepth(new Throwable());
+          callThrow(d);
+        } catch(Exception e) {
+          e.getStackTrace();
+          System.out.println(e.getMessage());
+          int throwableDepth = getDepth(e);
+          Asserts.assertTrue(throwableDepth == d ||
+                     (d > MaxJavaStackTraceDepth && throwableDepth == MaxJavaStackTraceDepth),
+                     "depth should return the correct value: depth tested=" +
+                     d + " throwableDepth=" + throwableDepth);
+        }
+      }
+    }
+  }
+
+  public static void main(String... unused) throws Exception {
+    Thrower t = new Thrower();
+    t.testThrow();
+  }
+}