| /* |
| * Copyright (c) 2015, 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 8087315 |
| * @summary Get old method's stack trace elements after GC |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * @modules java.compiler |
| * java.instrument |
| * jdk.jartool/sun.tools.jar |
| * @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(); |
| } |
| } |
| } |