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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.diagnostic;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.Arrays;
import java.util.Comparator;
/**
* @author yole
*/
public class ThreadDumper {
private ThreadDumper() {
}
public static String dumpThreadsToString() {
StringWriter writer = new StringWriter();
dumpThreadsToFile(ManagementFactory.getThreadMXBean(), writer);
return writer.toString();
}
@Nullable
static StackTraceElement[] dumpThreadsToFile(final ThreadMXBean threadMXBean, final Writer f) {
StackTraceElement[] edtStack = null;
boolean dumpSuccessful = false;
try {
ThreadInfo[] threads = sort(threadMXBean.dumpAllThreads(false, false));
for(ThreadInfo info: threads) {
if (info != null) {
if (info.getThreadName().equals("AWT-EventQueue-1")) {
edtStack = info.getStackTrace();
}
dumpThreadInfo(info, f);
}
}
dumpSuccessful = true;
}
catch (Exception ignored) {
}
if (!dumpSuccessful) {
final long[] threadIds = threadMXBean.getAllThreadIds();
final ThreadInfo[] threadInfo = sort(threadMXBean.getThreadInfo(threadIds, Integer.MAX_VALUE));
for (ThreadInfo info : threadInfo) {
if (info != null) {
if (info.getThreadName().equals("AWT-EventQueue-1")) {
edtStack = info.getStackTrace();
}
dumpThreadInfo(info, f);
}
}
}
return edtStack;
}
private static ThreadInfo[] sort(ThreadInfo[] threads) {
Arrays.sort(threads, new Comparator<ThreadInfo>() {
@Override
public int compare(ThreadInfo o1, ThreadInfo o2) {
final String t1 = o1.getThreadName();
final String t2 = o2.getThreadName();
if (t1.startsWith("AWT-EventQueue")) return -1;
if (t2.startsWith("AWT-EventQueue")) return 1;
final boolean r1 = o1.getThreadState() == Thread.State.RUNNABLE;
final boolean r2 = o2.getThreadState() == Thread.State.RUNNABLE;
if (r1 && !r2) return -1;
if (r2 && !r1) return 1;
return 0;
}
});
return threads;
}
private static void dumpThreadInfo(final ThreadInfo info, final Writer f) {
dumpCallStack(info, f, info.getStackTrace());
}
private static void dumpCallStack(final ThreadInfo info, final Writer f, final StackTraceElement[] stackTraceElements) {
try {
@NonNls StringBuilder sb = new StringBuilder("\"").append(info.getThreadName()).append("\"");
sb.append(" prio=0 tid=0x0 nid=0x0 ").append(getReadableState(info.getThreadState())).append("\n");
sb.append(" java.lang.Thread.State: ").append(info.getThreadState()).append("\n");
if (info.getLockName() != null) {
sb.append(" on ").append(info.getLockName());
}
if (info.getLockOwnerName() != null) {
sb.append(" owned by \"").append(info.getLockOwnerName()).append("\" Id=").append(info.getLockOwnerId());
}
if (info.isSuspended()) {
sb.append(" (suspended)");
}
if (info.isInNative()) {
sb.append(" (in native)");
}
f.write(sb + "\n");
for (StackTraceElement element : stackTraceElements) {
f.write("\tat " + element.toString() + "\n");
}
f.write("\n");
}
catch (IOException e) {
e.printStackTrace();
}
}
private static String getReadableState(Thread.State state) {
switch (state) {
case BLOCKED: return "blocked";
case TIMED_WAITING:
case WAITING: return "waiting on condition";
case RUNNABLE: return "runnable";
case NEW: return "new";
case TERMINATED: return "terminated";
}
return null;
}
}
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