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/*
* Copyright (c) 2007, 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.
*/
package nsk.jvmti.unit.GetAllStackTraces;
import java.io.PrintStream;
import nsk.share.Consts;
public class getallstktr001 {
final static int THREADS_LIMIT = 40;
final static String NAME_PREFIX = "getallstktr001-";
final static String THREAD_WAIT_METHOD_NAME = "RawMonitorEnter";
native static int GetResult();
native static void CreateRawMonitor();
native static void RawMonitorEnter();
native static void RawMonitorExit();
native static void GetAllStackTraces();
native static void GetThreadsInfo();
native static void GetThreadListStackTraces();
native static void ForceGC();
native static void CompareStackTraces();
native static void DeallocateBuffers();
static volatile int thrCount = 0;
public static void main(String args[]) {
args = nsk.share.jvmti.JVMTITest.commonInit(args);
// produce JCK-like exit status.
System.exit(run(args, System.out) + Consts.JCK_STATUS_BASE);
}
public static int run(String args[], PrintStream out) {
CreateRawMonitor();
TestThread thr[] = new TestThread[THREADS_LIMIT];
RawMonitorEnter();
for (int i=0; i < THREADS_LIMIT; i++) {
thr[i] = new TestThread(NAME_PREFIX + i);
thr[i].start();
}
// Wait until all hreads reach the expected state.
TestThread.waitAll();
// Now some of them have increased the counter,
// but may haven't reached RawMonitorEnter yet
// Wait for such threads to enter raw monitor
int tries = 100;
for ( ;; ) {
try { Thread.sleep(500); } catch ( InterruptedException e ) {}
boolean allThreadsReady = true;
for ( Thread t : thr ) {
StackTraceElement[] stack = t.getStackTrace();
if ( stack.length == 0 ) {
System.out.println("Thread " + t.getName() + " has an empty stack. Seems strange.");
continue;
}
if ( ! stack[0].getMethodName().equals(THREAD_WAIT_METHOD_NAME) ) {
System.out.println("Thread " + t.getName() + " hasn't reached the raw monitor yet:");
for ( StackTraceElement s : stack ) {
System.out.println("\t" + s);
}
allThreadsReady = false;
break;
}
}
if ( allThreadsReady )
break;
if ( --tries <= 0 )
throw new Error("Timed out waiting for all threads reaching the raw monitor");
}
GetAllStackTraces();
GetThreadsInfo();
GetThreadListStackTraces();
ForceGC();
CompareStackTraces();
DeallocateBuffers();
RawMonitorExit();
try {
for (int i=0; i < THREADS_LIMIT; i++) {
thr[i].join();
}
} catch (InterruptedException e) {
throw new Error("Unexpected: " + e);
}
return GetResult();
}
static class TestThread extends Thread {
static int counter=0;
int ind;
public TestThread(String name) {
super(name);
}
public void run() {
thrCount++;
foo(0);
}
private static synchronized void incrCounter() {
if (++counter == THREADS_LIMIT) {
TestThread.class.notify();
}
}
public static void waitAll() {
synchronized(TestThread.class) {
while (counter < THREADS_LIMIT) {
try {
TestThread.class.wait();
} catch (InterruptedException ex) {
}
}
}
}
public void foo(int i) {
i++;
if ( i < 10 ) {
foo(i);
} else {
incrCounter();
RawMonitorEnter();
RawMonitorExit();
}
}
}
}
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