查看“Jstack”的源代码

jstack 用于查看指定 java 进程的线程信息

=== 示例 ===

==== 代码 ====
<syntaxhighlight lang="java">
public class NewTest {
    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread();
        t.start();
        t.sleep(1000000);
        System.out.println("after t.sleep(1000000) ");
        t.join();
        System.out.println("after t.join() ");
    }
}
</syntaxhighlight><syntaxhighlight lang="powershell">
C:\Users\Administrator>jps -lm|findstr NewTest
33392 io.github.jihch.thread.NewTest

C:\Users\Administrator>jstack 33392 > NewTest.txt
</syntaxhighlight>






==== NewTest.txt ====
<syntaxhighlight lang="console">
2023-02-20 20:37:27
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.101-b13 mixed mode):

"Service Thread" #11 daemon prio=9 os_prio=0 tid=0x000000000a92f000 nid=0x410c runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C1 CompilerThread3" #10 daemon prio=9 os_prio=2 tid=0x000000000a925800 nid=0x93a4 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread2" #9 daemon prio=9 os_prio=2 tid=0x000000000a924800 nid=0x77e4 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" #8 daemon prio=9 os_prio=2 tid=0x000000000a924000 nid=0x8fcc waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #7 daemon prio=9 os_prio=2 tid=0x000000000a921000 nid=0x84dc waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Monitor Ctrl-Break" #6 daemon prio=5 os_prio=0 tid=0x000000000a941800 nid=0x558c runnable [0x000000000b1de000]
   java.lang.Thread.State: RUNNABLE
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
	at java.net.SocketInputStream.read(SocketInputStream.java:170)
	at java.net.SocketInputStream.read(SocketInputStream.java:141)
	at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
	at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
	- locked <0x0000000715fd2660> (a java.io.InputStreamReader)
	at java.io.InputStreamReader.read(InputStreamReader.java:184)
	at java.io.BufferedReader.fill(BufferedReader.java:161)
	at java.io.BufferedReader.readLine(BufferedReader.java:324)
	- locked <0x0000000715fd2660> (a java.io.InputStreamReader)
	at java.io.BufferedReader.readLine(BufferedReader.java:389)
	at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:49)

"Attach Listener" #5 daemon prio=5 os_prio=2 tid=0x00000000093fb800 nid=0xbc80 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=2 tid=0x00000000093a6800 nid=0x3c28 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=1 tid=0x0000000009383000 nid=0x3710 in Object.wait() [0x000000000a6df000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x0000000715d08ee0> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
	- locked <0x0000000715d08ee0> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" #2 daemon prio=10 os_prio=2 tid=0x0000000007cac800 nid=0x5e50 in Object.wait() [0x000000000a5df000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x0000000715d06b50> (a java.lang.ref.Reference$Lock)
	at java.lang.Object.wait(Object.java:502)
	at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
	- locked <0x0000000715d06b50> (a java.lang.ref.Reference$Lock)
	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

"main" #1 prio=5 os_prio=0 tid=0x00000000038b6000 nid=0x7c70 waiting on condition [0x00000000036af000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
	at java.lang.Thread.sleep(Native Method)
	at io.github.jihch.thread.NewTest.main(NewTest.java:7)

"VM Thread" os_prio=2 tid=0x0000000009362800 nid=0x92e0 runnable 

"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x00000000038cb800 nid=0xb220 runnable 

"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x00000000038cd000 nid=0x95cc runnable 

"GC task thread#2 (ParallelGC)" os_prio=0 tid=0x00000000038ce800 nid=0x195c runnable 

"GC task thread#3 (ParallelGC)" os_prio=0 tid=0x00000000038d0000 nid=0x99c8 runnable 

"GC task thread#4 (ParallelGC)" os_prio=0 tid=0x00000000038d3800 nid=0x96f0 runnable 

"GC task thread#5 (ParallelGC)" os_prio=0 tid=0x00000000038d4800 nid=0x7018 runnable 

"GC task thread#6 (ParallelGC)" os_prio=0 tid=0x00000000038d8000 nid=0x73b0 runnable 

"GC task thread#7 (ParallelGC)" os_prio=0 tid=0x00000000038d9000 nid=0x1270 runnable 

"GC task thread#8 (ParallelGC)" os_prio=0 tid=0x00000000038da000 nid=0x282c runnable 

"GC task thread#9 (ParallelGC)" os_prio=0 tid=0x00000000038db800 nid=0x8634 runnable 

"VM Periodic Task Thread" os_prio=2 tid=0x000000000aa8c000 nid=0x83d0 waiting on condition 

JNI global references: 16


</syntaxhighlight>