--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/RedefineTests/RedefineRunningMethodsWithBacktrace.java Thu Jul 23 15:18:56 2015 -0400
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2015, 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 8087315
+ * @summary Get old method's stack trace elements after GC
+ * @library /testlibrary
+ * @modules java.compiler
+ * java.instrument
+ * jdk.jartool/sun.tools.jar
+ * @build RedefineClassHelper
+ * @run main RedefineClassHelper
+ * @run main/othervm -javaagent:redefineagent.jar RedefineRunningMethodsWithBacktrace
+ */
+
+import static jdk.test.lib.Asserts.*;
+
+public class RedefineRunningMethodsWithBacktrace {
+
+ public static String newB =
+ "class RedefineRunningMethodsWithBacktrace$B {" +
+ " static int count1 = 0;" +
+ " static int count2 = 0;" +
+ " public static volatile boolean stop = false;" +
+ " static void localSleep() { " +
+ " try{ " +
+ " Thread.currentThread().sleep(10);" +
+ " } catch(InterruptedException ie) { " +
+ " } " +
+ " } " +
+ " public static void infinite() { " +
+ " System.out.println(\"infinite called\");" +
+ " }" +
+ " public static void throwable() { " +
+ " throw new RuntimeException(\"throwable called\");" +
+ " }" +
+ "}";
+
+ public static String evenNewerB =
+ "class RedefineRunningMethodsWithBacktrace$B {" +
+ " static int count1 = 0;" +
+ " static int count2 = 0;" +
+ " public static volatile boolean stop = false;" +
+ " static void localSleep() { " +
+ " try{ " +
+ " Thread.currentThread().sleep(1);" +
+ " } catch(InterruptedException ie) { " +
+ " } " +
+ " } " +
+ " public static void infinite() { }" +
+ " public static void throwable() { " +
+ " throw new RuntimeException(\"throwable called\");" +
+ " }" +
+ "}";
+
+ static class B {
+ static int count1 = 0;
+ static int count2 = 0;
+ public static volatile boolean stop = false;
+ static void localSleep() {
+ try {
+ Thread.currentThread().sleep(10);//sleep for 10 ms
+ } catch(InterruptedException ie) {
+ }
+ }
+
+ public static void infinite() {
+ while (!stop) { count1++; localSleep(); }
+ }
+ public static void throwable() {
+ // add some stuff to the original constant pool
+ String s1 = new String ("string1");
+ String s2 = new String ("string2");
+ String s3 = new String ("string3");
+ String s4 = new String ("string4");
+ String s5 = new String ("string5");
+ String s6 = new String ("string6");
+ String s7 = new String ("string7");
+ String s8 = new String ("string8");
+ String s9 = new String ("string9");
+ String s10 = new String ("string10");
+ String s11 = new String ("string11");
+ String s12 = new String ("string12");
+ String s13 = new String ("string13");
+ String s14 = new String ("string14");
+ String s15 = new String ("string15");
+ String s16 = new String ("string16");
+ String s17 = new String ("string17");
+ String s18 = new String ("string18");
+ String s19 = new String ("string19");
+ throw new RuntimeException("throwable called");
+ }
+ }
+
+ private static void touchRedefinedMethodInBacktrace(Throwable throwable) {
+ System.out.println("touchRedefinedMethodInBacktrace: ");
+ throwable.printStackTrace(); // this actually crashes with the bug in
+ // java_lang_StackTraceElement::create()
+
+ // Make sure that we can convert the backtrace, which is referring to
+ // the redefined method, to a StrackTraceElement[] without crashing.
+ StackTraceElement[] stackTrace = throwable.getStackTrace();
+ for (int i = 0; i < stackTrace.length; i++) {
+ StackTraceElement frame = stackTrace[i];
+ assertNotNull(frame.getClassName(),
+ "\nTest failed: trace[" + i + "].getClassName() returned null");
+ assertNotNull(frame.getMethodName(),
+ "\nTest failed: trace[" + i + "].getMethodName() returned null");
+ }
+ }
+
+ private static Throwable getThrowableInB() {
+ Throwable t = null;
+ try {
+ B.throwable();
+ } catch (Exception e) {
+ t = e;
+ // Don't print here because Throwable will cache the constructed stacktrace
+ // e.printStackTrace();
+ }
+ return t;
+ }
+
+
+ public static void main(String[] args) throws Exception {
+
+ new Thread() {
+ public void run() {
+ B.infinite();
+ }
+ }.start();
+
+ Throwable t1 = getThrowableInB();
+
+ RedefineClassHelper.redefineClass(B.class, newB);
+
+ System.gc();
+
+ Throwable t2 = getThrowableInB();
+
+ B.infinite();
+
+ for (int i = 0; i < 20 ; i++) {
+ String s = new String("some garbage");
+ System.gc();
+ }
+
+ RedefineClassHelper.redefineClass(B.class, evenNewerB);
+ System.gc();
+
+ Throwable t3 = getThrowableInB();
+
+ for (int i = 0; i < 20 ; i++) {
+ B.infinite();
+ String s = new String("some garbage");
+ System.gc();
+ }
+
+ touchRedefinedMethodInBacktrace(t1);
+ touchRedefinedMethodInBacktrace(t2);
+ touchRedefinedMethodInBacktrace(t3);
+
+ // purge should clean everything up.
+ B.stop = true;
+
+ for (int i = 0; i < 20 ; i++) {
+ B.infinite();
+ String s = new String("some garbage");
+ System.gc();
+ }
+ }
+}