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/*
* Copyright (c) 2015, 2018, 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 8010319
* @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.*;
// package access top-level class to avoid problem with RedefineClassHelper
// and nested types.
class RedefineRunningMethodsWithBacktrace_B {
static int count1 = 0;
static int count2 = 0;
public static volatile boolean stop = false;
static void localSleep() {
try {
Thread.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");
}
}
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.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.sleep(1);" +
" } catch(InterruptedException ie) { " +
" } " +
" } " +
" public static void infinite() { }" +
" public static void throwable() { " +
" 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 {
RedefineRunningMethodsWithBacktrace_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() {
RedefineRunningMethodsWithBacktrace_B.infinite();
}
}.start();
Throwable t1 = getThrowableInB();
RedefineClassHelper.redefineClass(RedefineRunningMethodsWithBacktrace_B.class, newB);
System.gc();
Throwable t2 = getThrowableInB();
RedefineRunningMethodsWithBacktrace_B.infinite();
for (int i = 0; i < 20 ; i++) {
String s = new String("some garbage");
System.gc();
}
RedefineClassHelper.redefineClass(RedefineRunningMethodsWithBacktrace_B.class, evenNewerB);
System.gc();
Throwable t3 = getThrowableInB();
for (int i = 0; i < 20 ; i++) {
RedefineRunningMethodsWithBacktrace_B.infinite();
String s = new String("some garbage");
System.gc();
}
touchRedefinedMethodInBacktrace(t1);
touchRedefinedMethodInBacktrace(t2);
touchRedefinedMethodInBacktrace(t3);
// purge should clean everything up.
RedefineRunningMethodsWithBacktrace_B.stop = true;
for (int i = 0; i < 20 ; i++) {
RedefineRunningMethodsWithBacktrace_B.infinite();
String s = new String("some garbage");
System.gc();
}
}
}
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