--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/Thread/GenerifyStackTraces.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,181 @@
+/*
+ * Copyright 2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 4919105
+ * @summary Generified basic unit test of Thread.getAllStackTraces()
+ * @author Mandy Chung
+ *
+ * @compile -source 1.5 GenerifyStackTraces.java
+ * @run main GenerifyStackTraces
+ */
+
+import java.util.*;
+
+public class GenerifyStackTraces {
+
+ private static Object go = new Object();
+ private static Object dumpObj = new Object();
+ private static String[] methodNames = {"run", "A", "B", "C", "Done"};
+ private static int DONE_DEPTH = 5;
+ private static boolean testFailed = false;
+
+ private static Thread one;
+ private static boolean trace = false;
+ public static void main(String[] args) throws Exception {
+ if (args.length > 0 && args[0].equals("trace")) {
+ trace = true;
+ }
+
+ one = new ThreadOne();
+ one.start();
+
+ Thread dt = new DumpThread();
+ dt.setDaemon(true);
+ dt.start();
+
+ if (testFailed) {
+ throw new RuntimeException("Test Failed.");
+ }
+ }
+
+ static class DumpThread extends Thread {
+ public void run() {
+ int depth = 2;
+ while (true) {
+ // At each iterator, wait until ThreadOne blocks
+ // to wait for thread dump.
+ // Then dump stack trace and notify ThreadOne to continue.
+ try {
+ sleep(2000);
+ dumpStacks(depth);
+ depth++;
+ finishDump();
+ } catch (Exception e) {
+ e.printStackTrace();
+ testFailed = true;
+ }
+ }
+ }
+ }
+
+ static class ThreadOne extends Thread {
+ public void run() {
+ A();
+ }
+ private void A() {
+ waitForDump();
+ B();
+ }
+ private void B() {
+ waitForDump();
+ C();
+ }
+ private void C() {
+ waitForDump();
+ Done();
+ }
+ private void Done() {
+ waitForDump();
+
+ // Get stack trace of current thread
+ StackTraceElement[] stack = getStackTrace();
+ try {
+ checkStack(this, stack, DONE_DEPTH);
+ } catch (Exception e) {
+ e.printStackTrace();
+ testFailed = true;
+ }
+ }
+
+ }
+
+
+ static private void waitForDump() {
+ synchronized(go) {
+ try {
+ go.wait();
+ } catch (Exception e) {
+ throw new RuntimeException("Unexpected exception" + e);
+ }
+ }
+ }
+
+ static private void finishDump() {
+ synchronized(go) {
+ try {
+ go.notifyAll();
+ } catch (Exception e) {
+ throw new RuntimeException("Unexpected exception" + e);
+ }
+ }
+ }
+
+ public static void dumpStacks(int depth) throws Exception {
+ // Get stack trace of another thread
+ StackTraceElement[] stack = one.getStackTrace();
+ checkStack(one, stack, depth);
+
+
+ // Get stack traces of all Threads
+ for (Map.Entry<Thread, StackTraceElement[]> entry :
+ Thread.getAllStackTraces().entrySet()) {
+ Thread t = entry.getKey();
+ stack = entry.getValue();
+ if (t == null || stack == null) {
+ throw new RuntimeException("Null thread or stacktrace returned");
+ }
+ if (t == one) {
+ checkStack(t, stack, depth);
+ }
+ }
+ }
+
+ private static void checkStack(Thread t, StackTraceElement[] stack,
+ int depth) throws Exception {
+ if (trace) {
+ printStack(t, stack);
+ }
+ int frame = stack.length - 1;
+ for (int i = 0; i < depth; i++) {
+ if (! stack[frame].getMethodName().equals(methodNames[i])) {
+ throw new RuntimeException("Expected " + methodNames[i] +
+ " in frame " + frame + " but got " +
+ stack[frame].getMethodName());
+ }
+ frame--;
+ }
+ }
+
+ private static void printStack(Thread t, StackTraceElement[] stack) {
+ System.out.println(t +
+ " stack: (length = " + stack.length + ")");
+ if (t != null) {
+ for (int j = 0; j < stack.length; j++) {
+ System.out.println(stack[j]);
+ }
+ System.out.println();
+ }
+ }
+}