Improve JVMCrashByEAVServlet

k-tamura · Feb 13, 2017 · a2cc9fd · a2cc9fd
1 parent aa4efd4
commit a2cc9fd
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Showing 3 changed files with 15 additions and 23 deletions.
diff --git a/src/main/java/org/t246osslab/easybuggy/troubles/JVMCrashByEAVServlet.java b/src/main/java/org/t246osslab/easybuggy/troubles/JVMCrashByEAVServlet.java
@@ -1,8 +1,7 @@
 package org.t246osslab.easybuggy.troubles;
 
 import java.io.IOException;
-import java.io.PrintWriter;
-import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
 
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
@@ -11,31 +10,26 @@
 import javax.servlet.http.HttpServletResponse;
 
 import org.pmw.tinylog.Logger;
-import org.t246osslab.easybuggy.utils.Closer;
-import org.t246osslab.easybuggy.utils.HTTPResponseCreator;
-import org.t246osslab.easybuggy.utils.MessageUtils;
 
-//import sun.dc.path.PathConsumer;
-//import sun.dc.pr.PathDasher;
+import sun.misc.Unsafe;
 
 @SuppressWarnings("serial")
 @WebServlet(urlPatterns = { "/jvmcrasheav" })
 public class JVMCrashByEAVServlet extends HttpServlet {
 
     protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
-        // PathDasher dasher = new PathDasher(null);
-        PrintWriter writer = null;
+
         try {
-            Class<?> cl = Class.forName("sun.dc.pr.PathDasher");
-            Class<?> cl2 = Class.forName("sun.dc.path.PathConsumer");
-            Constructor<?> cunstructor = cl.getConstructor(new Class[] { cl2 });
-            cunstructor.newInstance(new Object[] { null });
+            getUnsafe().getByte(0);
         } catch (Exception e) {
             Logger.error(e);
-            HTTPResponseCreator.createSimpleResponse(res, null,
-                    MessageUtils.getMsg("msg.info.jvm.not.crash", req.getLocale()));
-        } finally {
-            Closer.close(writer);
         }
     }
+
+    private static Unsafe getUnsafe()
+            throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
+        Field singleoneInstanceField = Unsafe.class.getDeclaredField("theUnsafe");
+        singleoneInstanceField.setAccessible(true);
+        return (Unsafe) singleoneInstanceField.get(null);
+    }
 }
diff --git a/src/main/resources/indexpage_en.properties b/src/main/resources/indexpage_en.properties
@@ -15,9 +15,8 @@ function.name.dead.lock2=Dead Lock (SQL)
 function.description.dead.lock2=Dead lock (SQL) occurs after loading the page few times.
 function.name.endless.waiting.process=Endless Waiting Process
 function.description.endless.waiting.process=Endless waiting process occurs after loading the page.
-function.name.jvm.crash.eav=JVM Crash (EXCEPTION_ACCESS_VIOLATION)
-function.description.jvm.crash.eav=JVM crashes after clicking this link.<br>\
-(* JVM crash only occurs if using Oracle JDK 6 or 7)
+function.name.jvm.crash.eav=JVM Crash
+function.description.jvm.crash.eav=JVM crashes after clicking this link.
 function.name.redirect.loop=Redirect Loop
 function.description.redirect.loop=Redirect loop occurs after clicking this link.
 function.name.network.socket.leak=Network Socket Leak

diff --git a/src/main/resources/indexpage_ja.properties b/src/main/resources/indexpage_ja.properties
@@ -15,9 +15,8 @@ function.name.dead.lock2=\u30c7\u30c3\u30c9\u30ed\u30c3\u30af (SQL)
 function.description.dead.lock2=\u30da\u30fc\u30b8\u3092\u6570\u56de\u30ed\u30fc\u30c9\u3059\u308b\u3068\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af(SQL)\u304c\u767a\u751f\u3057\u307e\u3059\u3002
 function.name.endless.waiting.process=\u5b8c\u4e86\u3057\u306a\u3044\u30d7\u30ed\u30bb\u30b9\u306e\u5f85\u6a5f
 function.description.endless.waiting.process=\u30da\u30fc\u30b8\u3092\u30ed\u30fc\u30c9\u3059\u308b\u3068\u3001\u5b8c\u4e86\u3057\u306a\u3044\u30d7\u30ed\u30bb\u30b9\u306e\u5f85\u6a5f\u304c\u767a\u751f\u3057\u307e\u3059\u3002
-function.name.jvm.crash.eav=JVM\u30af\u30e9\u30c3\u30b7\u30e5 (EXCEPTION_ACCESS_VIOLATION)
-function.description.jvm.crash.eav=\u3053\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068JVM\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002<br> \
-(* JVM\u306e\u30af\u30e9\u30c3\u30b7\u30e5\u306f\u3001Oracle JDK 6\u307e\u305f\u306f7\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306b\u306e\u307f\u767a\u751f\u3057\u307e\u3059)
+function.name.jvm.crash.eav=JVM\u30af\u30e9\u30c3\u30b7\u30e5
+function.description.jvm.crash.eav=\u3053\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068JVM\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002
 function.name.redirect.loop=\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u30eb\u30fc\u30d7
 function.description.redirect.loop=\u3053\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u30eb\u30fc\u30d7\u304c\u767a\u751f\u3057\u307e\u3059\u3002
 function.name.network.socket.leak=\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bd\u30b1\u30c3\u30c8\u30ea\u30fc\u30af