From c273895d8232528bbde7d66692b88f6f2309a7fc Mon Sep 17 00:00:00 2001
From: Robert Muir <rmuir@apache.org>
Date: Wed, 9 Sep 2015 18:00:46 -0400
Subject: [PATCH] Remove noise when IDE test runners try to System.exit

---
 .../bootstrap/BootstrapForTesting.java        |  2 +-
 .../bootstrap/XTestSecurityManager.java       | 95 +++++++++++++++++++
 2 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 core/src/test/java/org/elasticsearch/bootstrap/XTestSecurityManager.java

diff --git a/core/src/test/java/org/elasticsearch/bootstrap/BootstrapForTesting.java b/core/src/test/java/org/elasticsearch/bootstrap/BootstrapForTesting.java
index 58f4406ae7e..a779db2326b 100644
--- a/core/src/test/java/org/elasticsearch/bootstrap/BootstrapForTesting.java
+++ b/core/src/test/java/org/elasticsearch/bootstrap/BootstrapForTesting.java
@@ -114,7 +114,7 @@ public class BootstrapForTesting {
                     perms.add(new FilePermission(coverageDir.resolve("jacoco-it.exec").toString(), "read,write"));
                 }
                 Policy.setPolicy(new ESPolicy(perms));
-                System.setSecurityManager(new TestSecurityManager());
+                System.setSecurityManager(new XTestSecurityManager());
                 Security.selfTest();
             } catch (Exception e) {
                 throw new RuntimeException("unable to install test security manager", e);
diff --git a/core/src/test/java/org/elasticsearch/bootstrap/XTestSecurityManager.java b/core/src/test/java/org/elasticsearch/bootstrap/XTestSecurityManager.java
new file mode 100644
index 00000000000..3c25c0aa05b
--- /dev/null
+++ b/core/src/test/java/org/elasticsearch/bootstrap/XTestSecurityManager.java
@@ -0,0 +1,95 @@
+package org.elasticsearch.bootstrap;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * A {@link SecurityManager} that prevents tests calling {@link System#exit(int)}.
+ * Only the test runner itself is allowed to exit the JVM.
+ * All other security checks are handled by the default security policy.
+ * <p>
+ * Use this with {@code -Djava.security.manager=org.apache.lucene.util.TestSecurityManager}.
+ */ 
+// TODO: remove me when https://issues.apache.org/jira/browse/LUCENE-6794 is committed
+public final class XTestSecurityManager extends SecurityManager {
+  
+  static final String JUNIT4_TEST_RUNNER_PACKAGE = "com.carrotsearch.ant.tasks.junit4.";
+  static final String ECLIPSE_TEST_RUNNER_PACKAGE = "org.eclipse.jdt.internal.junit.runner.";
+  static final String IDEA_TEST_RUNNER_PACKAGE = "com.intellij.rt.execution.junit.JUnitStarter.";
+
+  /**
+   * Creates a new TestSecurityManager. This ctor is called on JVM startup,
+   * when {@code -Djava.security.manager=org.apache.lucene.util.TestSecurityManager}
+   * is passed to JVM.
+   */
+  public XTestSecurityManager() {
+    super();
+  }
+
+  /**
+   * {@inheritDoc}
+   * <p>This method inspects the stack trace and checks who is calling
+   * {@link System#exit(int)} and similar methods
+   * @throws SecurityException if the caller of this method is not the test runner itself.
+   */
+  @Override
+  public void checkExit(final int status) {
+    AccessController.doPrivileged(new PrivilegedAction<Void>() {
+      @Override
+      public Void run() {
+        final String systemClassName = System.class.getName(),
+            runtimeClassName = Runtime.class.getName();
+        String exitMethodHit = null;
+        for (final StackTraceElement se : Thread.currentThread().getStackTrace()) {
+          final String className = se.getClassName(), methodName = se.getMethodName();
+          if (
+            ("exit".equals(methodName) || "halt".equals(methodName)) &&
+            (systemClassName.equals(className) || runtimeClassName.equals(className))
+          ) {
+            exitMethodHit = className + '#' + methodName + '(' + status + ')';
+            continue;
+          }
+          
+          if (exitMethodHit != null) {
+            if (className.startsWith(JUNIT4_TEST_RUNNER_PACKAGE) || 
+                className.startsWith(ECLIPSE_TEST_RUNNER_PACKAGE) ||
+                className.startsWith(IDEA_TEST_RUNNER_PACKAGE)) {
+              // this exit point is allowed, we return normally from closure:
+              return /*void*/ null;
+            } else {
+              // anything else in stack trace is not allowed, break and throw SecurityException below:
+              break;
+            }
+          }
+        }
+        
+        if (exitMethodHit == null) {
+          // should never happen, only if JVM hides stack trace - replace by generic:
+          exitMethodHit = "JVM exit method";
+        }
+        throw new SecurityException(exitMethodHit + " calls are not allowed because they terminate the test runner's JVM.");
+      }
+    });
+    
+    // we passed the stack check, delegate to super, so default policy can still deny permission:
+    super.checkExit(status);
+  }
+
+}