\u5728Linux\u7cfb\u7edf\u4e2d\uff0cdump\u5806\u6808\u4fe1\u606f\u662f\u4e00\u9879\u975e\u5e38\u91cd\u8981\u7684\u4efb\u52a1\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u548c\u7cfb\u7edf\u7ba1\u7406\u5458\u5feb\u901f\u4e86\u89e3\u7a0b\u5e8f\u7684\u8fd0\u884c\u60c5\u51b5\uff0c\u5c24\u5176\u662f\u5f53\u7a0b\u5e8f\u51fa\u73b0\u5f02\u5e38\u6216\u8005\u5d29\u6e83\u65f6\uff0cdump\u5806\u6808\u4fe1\u606f\u53ef\u4ee5\u6709\u6548\u5730\u5e2e\u52a9\u6211\u4eec\u5b9a\u4f4d\u95ee\u9898\u7684\u6839\u6e90\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5728Linux\u7cfb\u7edf\u4e2d\u5982\u4f55dump\u5806\u6808\u4fe1\u606f\u3002<\/p>\n
\u4ec0\u4e48\u662f\u5806\u6808\uff1f<\/p>\n
\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\uff0c\u5806\u6808\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u662f\u4e00\u4e2a\u5148\u8fdb\u540e\u51fa\uff08LIFO\uff09\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5728\u5806\u6808\u4e2d\uff0c\u6700\u540e\u8fdb\u5165\u7684\u5143\u7d20\u662f\u9996\u5148\u88ab\u5904\u7406\u7684\u3002\u5806\u6808\u5e38\u5e38\u88ab\u7528\u6765\u5b9e\u73b0\u51fd\u6570\u8c03\u7528\u7684\u8fc7\u7a0b\uff0c\u6bcf\u4e2a\u51fd\u6570\u8c03\u7528\u90fd\u4f1a\u5728\u5806\u6808\u4e2d\u5206\u914d\u4e00\u5b9a\u7684\u7a7a\u95f4\uff0c\u5f53\u51fd\u6570\u8c03\u7528\u7ed3\u675f\u540e\uff0c\u8fd9\u4e9b\u7a7a\u95f4\u4f1a\u88ab\u91ca\u653e\u3002<\/p>\n
\u5f53\u7a0b\u5e8f\u51fa\u73b0\u5f02\u5e38\u6216\u8005\u5d29\u6e83\u65f6\uff0c\u5806\u6808\u4fe1\u606f\u53ef\u4ee5\u975e\u5e38\u6709\u7528\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u663e\u793a\u7a0b\u5e8f\u5728\u5d29\u6e83\u524d\u7684\u8c03\u7528\u6808\u4fe1\u606f\uff0c\u4ece\u800c\u5e2e\u52a9\u6211\u4eec\u786e\u5b9a\u7a0b\u5e8f\u5d29\u6e83\u7684\u539f\u56e0\u53ca\u5176\u5728\u4ee3\u7801\u4e2d\u7684\u4f4d\u7f6e\u3002<\/p>\n
\u5982\u4f55dump\u5806\u6808\u4fe1\u606f\uff1f<\/p>\n
\u5728Linux\u7cfb\u7edf\u4e2d\uff0cdump\u5806\u6808\u4fe1\u606f\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff0c\u4e0b\u9762\u6211\u4eec\u5c06\u4ecb\u7ecd\u51e0\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\u3002<\/p>\n
\u65b9\u6cd5\u4e00\u3001\u4f7f\u7528gdb\u8c03\u8bd5\u5668<\/p>\n
gdb\u662fLinux\u4e0b\u8457\u540d\u7684\u8c03\u8bd5\u5668\uff0c\u53ef\u4ee5\u7528\u6765\u8c03\u8bd5C\u8bed\u8a00\u3001C++\u3001Python\u7b49\u591a\u79cd\u7f16\u7a0b\u8bed\u8a00\u7684\u7a0b\u5e8f\u3002\u5728gdb\u4e2d\uff0c\u4f7f\u7528\u201cbt\u201d\u547d\u4ee4\u5373\u53ef\u67e5\u770b\u7a0b\u5e8f\u7684\u5806\u6808\u4fe1\u606f\uff0c\u5177\u4f53\u64cd\u4f5c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
1. \u4f7f\u7528gdb\u542f\u52a8\u7a0b\u5e8f\uff1a<\/p>\n
\u201c`<\/p>\n
gdb your_program<\/p>\n
\u201c`<\/p>\n
2. \u5728gdb\u4e2d\u6267\u884c\u201crun\u201d\u547d\u4ee4\u542f\u52a8\u7a0b\u5e8f\uff1a<\/p>\n
\u201c`<\/p>\n
(gdb) run<\/p>\n
\u201c`<\/p>\n
3. \u7b49\u7a0b\u5e8f\u51fa\u73b0\u5f02\u5e38\u6216\u8005\u5d29\u6e83\u540e\uff0c\u5728gdb\u4e2d\u6267\u884c\u201cbt\u201d\u547d\u4ee4\u67e5\u770b\u5806\u6808\u4fe1\u606f\uff1a<\/p>\n
\u201c`<\/p>\n
(gdb) bt<\/p>\n
\u201c`<\/p>\n
\u65b9\u6cd5\u4e8c\u3001\u4f7f\u7528pstack\u5de5\u5177<\/p>\n
pstack\u662fLinux\u4e0b\u7684\u4e00\u4e2a\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u663e\u793a\u5f53\u524d\u8fdb\u7a0b\u7684\u5806\u6808\u4fe1\u606f\u3002\u5177\u4f53\u64cd\u4f5c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
1. \u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u7a0b\u5e8f\u7684PID\uff1a<\/p>\n
\u201c`<\/p>\n
ps aux | grep your_program<\/p>\n
\u201c`<\/p>\n
\u5176\u4e2dyour_program\u662f\u6307\u8981\u67e5\u770b\u7684\u7a0b\u5e8f\u540d\u79f0\u3002<\/p>\n
2. \u4f7f\u7528pstack\u5de5\u5177\u67e5\u770bPID\u5bf9\u5e94\u7684\u8fdb\u7a0b\u7684\u5806\u6808\u4fe1\u606f\uff1a<\/p>\n
\u201c`<\/p>\n
pstack PID<\/p>\n
\u201c`<\/p>\n
\u5176\u4e2dPID\u662f\u4e0a\u4e00\u6b65\u67e5\u8be2\u5230\u7684\u7a0b\u5e8f\u7684PID\u3002<\/p>\n
\u65b9\u6cd5\u4e09\u3001\u4f7f\u7528jstack\u5de5\u5177<\/p>\n
jstack\u662fJava jdk\u81ea\u5e26\u7684\u4e00\u79cd\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u67e5\u770bJava\u865a\u62df\u673a\u8fdb\u7a0b\u7684\u5806\u6808\u4fe1\u606f\u3002\u5e38\u5e38\u7528\u6765\u67e5\u770bJava\u8fdb\u7a0b\u662f\u5426\u51fa\u73b0\u6b7b\u9501\u3001\u7ebf\u7a0b\u963b\u585e\u7b49\u95ee\u9898\u3002\u5177\u4f53\u64cd\u4f5c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
1. \u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u7a0b\u5e8f\u7684PID\uff1a<\/p>\n
\u201c`<\/p>\n
ps aux | grep java | grep your_program<\/p>\n
\u201c`<\/p>\n
\u5176\u4e2dyour_program\u662f\u6307\u8981\u67e5\u770b\u7684Java\u7a0b\u5e8f\u540d\u79f0\u3002<\/p>\n
2. \u4f7f\u7528jstack\u5de5\u5177\u67e5\u770bPID\u5bf9\u5e94\u7684\u8fdb\u7a0b\u7684\u5806\u6808\u4fe1\u606f\uff1a<\/p>\n
\u201c`<\/p>\n
jstack PID<\/p>\n
\u201c`<\/p>\n
\u5176\u4e2dPID\u662f\u4e0a\u4e00\u6b65\u67e5\u8be2\u5230\u7684Java\u7a0b\u5e8f\u7684PID\u3002<\/p>\n
\u65e0\u8bba\u662f\u5bf9\u4e8e\u7a0b\u5e8f\u5458\u8fd8\u662f\u7cfb\u7edf\u7ba1\u7406\u5458\u6765\u8bf4\uff0cdump\u5806\u6808\u4fe1\u606f\u662f\u4e00\u9879\u975e\u5e38\u91cd\u8981\u7684\u4efb\u52a1\u3002\u901a\u8fc7\u5bf9\u5806\u6808\u4fe1\u606f\u7684\u5206\u6790\uff0c\u6211\u4eec\u53ef\u4ee5\u4e86\u89e3\u7a0b\u5e8f\u7684\u6574\u4e2a\u8c03\u7528\u8fc7\u7a0b\uff0c\u786e\u5b9a\u7a0b\u5e8f\u5d29\u6e83\u7684\u539f\u56e0\u53ca\u5176\u5728\u4ee3\u7801\u4e2d\u7684\u4f4d\u7f6e\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528gdb\u3001pstack\u3001jstack\u7b49\u5de5\u5177\u6765dump\u5806\u6808\u4fe1\u606f\u3002\u8fd9\u4e9b\u5de5\u5177\u7684\u4f7f\u7528\u65b9\u6cd5\u4e0d\u540c\uff0c\u4f46\u5176\u5b9e\u73b0\u7684\u76ee\u7684\u662f\u76f8\u540c\u7684\uff0c\u5373\u901a\u8fc7\u67e5\u770b\u7a0b\u5e8f\u7684\u5806\u6808\u4fe1\u606f\u6765\u5e2e\u52a9\u6211\u4eec\u5feb\u901f\u89e3\u51b3\u95ee\u9898\u3002<\/p>\n
\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n \u7ebf\u7a0bdump\u662f\u975e\u5e38\u6709\u7528\u7684\u8bca\u65adjava\u5e94\u7528\u95ee\u9898\u7684\u5de5\u5177\uff0c\u6bcf\u4e00\u4e2ajava\u865a\u65e9\u65c5\u62df\u673a\u90fd\u6709\u53ca\u65f6\u751f\u6210\u663e\u793a\u6240\u6709\u7ebf\u7a0b\u5728\u67d0\u4e00\u70b9\u72b6\u6001\u7684\u7ebf\u7a0bdump\u80fd\u529b\u3002\u867d\u7136\u6bcf\u4e2ajava\u865a\u62df\u673a\u7ebf\u7a0bdump\u6253\u5370\u8f93\u51fa\u683c\u5f0f\u4e0a\u7565\u5fae\u6709\u6563\u7741\u9675\u4e00\u4e9b\u4e0d\u540c\uff0c\u4f46\u662f\u7ebf\u7a0bdump\u7684\u4fe1\u606f\u5305\u542b\u7ebf\u7a0b\u57fa\u672c\u4fe1\u606f\u3001\u7ebf\u51b2\u621a\u7a0b\u7684\u8fd0\u884c\u72b6\u6001\u3001\u6807\u8bc6\u3001\u8c03\u7528\u7684\u5806\u6808\uff1b\u8c03\u7528\u7684\u5806\u6808\u5305\u542b\u5b8c\u6574\u7684\u7c7b\u540d\uff0c\u6240\u6267\u884c\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u53ef\u80fd\u7684\u8bdd\u8fd8\u6709\u6e90\u4ee3\u7801\u7684\u884c\u6570\u3002<\/p>\n \u4e4b\u4e00\u6b65\uff1a\u5728\u7ec8\u7aef\u8fd0\u884cJava\u7a0b\u5e8f<\/p>\n \u7b2c\u4e8c\u6b65\uff1a\u901a\u8fc7\u547d\u4ee4 pidof java \u627e\u5230\u5df2\u7ecf\u542f\u52a8\u7684java\u8fdb\u7a0b\u7684ID\uff0c\u9009\u62e9\u9700\u8981\u67e5\u770b\u7684java\u7a0b\u5e8f\u7684\u8fdb\u7a0bID<\/p>\n \u7b2c\u4e09\u6b65\uff1a\u4f7f\u7528\u547d\u4ee4 kill -3 \u6253\u5370\u51fajava\u7a0b\u5e8f\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f<\/p>\n \u7b2c\u56db\u6b65\uff1a\u901a\u5e38\u60c5\u51b5\u4e0b\u8fd0\u884c\u7684\u9879\u76ee\u53ef\u548c\u5356\u8fc5\u80fd\u4f1a\u6bd4\u8f83\u5927\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\u6253\u5370\u7684\u5806\u6808\u4fe1\u606f\u53ef\u80fd\u4f1a\u6709\u51e0\u5343\u5230\u51e0\u4e07\u884c\uff0c\u4e3a\u4e86\u65b9\u4fbf\u67e5\u770b\uff0c\u6211\u4eec\u5f80\u5f80\u9700\u8981\u5c06\u8f93\u51fa\u5185\u5bb9\u8fdb\u884c\u91cd\u5b9a\u5411<\/p>\n \u4f7f\u7528linux\u4e0b\u7684\u91cd\u5b9a\u5411\u547d\u4ee4\u65b9\u5f0f\u5373\u53ef\uff1a\u4f8b\u5982\uff1a demo.sh > run.log 2>&1 \u5c06\u8f93\u51fa\u4fe1\u606f\u91cd\u5b9a\u5411\u5230 run.log\u4e2d\u3002<\/p>\n \u6ce8\uff1a\u5728\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c0 1 2\u5206\u522b\u5bf9\u5e94\u7740\u4e0d\u540c\u7684\u542b\u4e49\uff0c \u5982\u4e0b\uff1a<\/p>\n 0 \uff1a \u6807\u51c6\u8f93\u5165\uff0c\u5373\uff1aC\u4e2d\u7684stdin \uff0c java\u4e2d\u7684System.in<\/p>\n 1 \uff1a \u6807\u51c6\u8f93\u51fa\uff0c \u5373\uff1aC\u4e2d\u7684stdout \uff0cjava\u4e2d\u7684\u914d\u6b63System.out<\/p>\n 2 \uff1a \u9519\u8bef\u8f93\u51fa\uff0c \u5373\uff1aC\u4e2d\u7684stderr \uff0c java\u4e2d\u7684System.err<\/p>\n Demo\uff1a<\/p>\n<\/p>\n Sources Code \uff1a<\/p>\n public class PrintThreadTrace {<\/p>\n Object obj1 = new Object();<\/p>\n Object obj2 = new Object();<\/p>\n public void func1(){<\/p>\n synchronized (obj1){<\/p>\n func2();<\/p>\n }<\/p>\n }<\/p>\n public void func2(){<\/p>\n synchronized (obj2){<\/p>\n while(true){<\/p>\n System.out.print(\u201c\u201d);<\/p>\n }<\/p>\n }<\/p>\n }<\/p>\n public static void main(String args){<\/p>\n PrintThreadTrace ptt = new PrintThreadTrace();<\/p>\n ptt.func1();<\/p>\n }<\/p>\n } <\/p>\n<\/p>\n \u6309\u7167\u6b65\u9aa4\u64cd\u4f5c\u540e\u5524\u6b64\u7684\u6253\u5370\u8f93\u51fa\u4fe1\u606f\uff1a<\/p>\n Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.79-b02 mixed mode):<\/p>\n \u201cService Thread\u201d daemon prio=10 tid=0x00007fdc880a9000 nid=0x12a4 runnable <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cC2 CompilerThread1\u201d daemon prio=10 tid=0x00007fdc880a7000 nid=0x12a3 waiting on condition <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cC2 CompilerThread0\u201d daemon prio=10 tid=0x00007fdc880a4000 nid=0x12a2 waiting on condition <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cJDWP Command Reader\u201d daemon prio=10 tid=0x00007fdcnid=0x1299 runnable <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cJDWP Event Helper Thread\u201d daemon prio=10 tid=0x00007fdc880a1800 nid=0x1298 runnable <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cJDWP Transport Listener: dt_socket\u201d daemon prio=10 tid=0x00007fdc8809e000 nid=0x1297 runnable <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cSignal Dispatcher\u201d daemon prio=10 tid=0x00007fdcnid=0x1296 waiting on condition <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n \u201cFinalizer\u201d daemon prio=10 tid=0x00007fdcnid=0x1295 in Object.wait() <\/p>\n<\/p>\n java.lang.Thread.State: WAITING (on object monitor)<\/p>\n at java.lang.Object.wait(Native Method)<\/p>\n \u2013 waiting on (a java.lang.ref.ReferenceQueue$Lock)<\/p>\n at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)<\/p>\n \u2013 locked (a java.lang.ref.ReferenceQueue$Lock)<\/p>\n at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)<\/p>\n at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)<\/p>\n \u201cReference Handler\u201d daemon prio=10 tid=0x00007fdc8806f800 nid=0x1294 in Object.wait() <\/p>\n<\/p>\n java.lang.Thread.State: WAITING (on object monitor)<\/p>\n at java.lang.Object.wait(Native Method)<\/p>\n \u2013 waiting on (a java.lang.ref.Reference$Lock)<\/p>\n at java.lang.Object.wait(Object.java:503)<\/p>\n at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)<\/p>\n \u2013 locked (a java.lang.ref.Reference$Lock)<\/p>\n \u201cmain\u201d prio=10 tid=0x00007fdc8800b800 nid=0x128e runnable <\/p>\n<\/p>\n java.lang.Thread.State: RUNNABLE<\/p>\n at com.wenchain.study.PrintThreadTrace.func2(PrintThreadTrace.java:20)<\/p>\n \u2013 locked (a java.lang.Object)<\/p>\n at com.wenchain.study.PrintThreadTrace.func1(PrintThreadTrace.java:13)<\/p>\n \u2013 locked (a java.lang.Object)<\/p>\n at com.wenchain.study.PrintThreadTrace.main(PrintThreadTrace.java:27)<\/p>\n \u201cVM Thread\u201d prio=10 tid=0x00007fdc8806b000 nid=0x1293 runnable <\/p>\n \u201cGC task thread#0 (ParallelGC)\u201d prio=10 tid=0x00007fdcnid=0x128f runnable <\/p>\n \u201cGC task thread#1 (ParallelGC)\u201d prio=10 tid=0x00007fdcnid=0x1290 runnable <\/p>\n \u201cGC task thread#2 (ParallelGC)\u201d prio=10 tid=0x00007fdcnid=0x1291 runnable <\/p>\n \u201cGC task thread#3 (ParallelGC)\u201d prio=10 tid=0x00007fdcnid=0x1292 runnable <\/p>\n \u201cVM Periodic Task Thread\u201d prio=10 tid=0x00007fdc880b3800 nid=0x12a5 waiting on condition <\/p>\n JNI global references: 1391<\/p>\n Heap<\/p>\n PSYoungGen total 17920K, used 1270K <\/p>\n eden space 15872K, 8% used <\/p>\n from space 2023K, 0% used <\/p>\n to space 2023K, 0% used <\/p>\n ParOldGentotal 39424K, used 0K <\/p>\n object space 39424K, 0% used <\/p>\n PSPermGentotal 21504K, used 2619K <\/p>\n object space 21504K, 12% used <\/p>\n<\/p>\n \u4e0a\u9762\u7684\u4fe1\u606f\u4e2d\u5305\u542b\u4e86\u5f53\u524dJVM\u4e2d\u6240\u6709\u8fd0\u884c\u7684\u7ebf\u7a0b\u4fe1\u606f\uff0c\u5176\u4e2d\u5728\u793a\u4f8b\u4e2d\u6211\u4eec\u542f\u52a8\u7684\u7ebf\u7a0b\u4e3amain\u7ebf\u7a0b\uff0c\u5176\u4f59\u7684\u90fd\u662fJVM\u81ea\u5df1\u521b\u5efa\u7684\u3002<\/p>\n \u5728\u6253\u5370\u7684\u4fe1\u606f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6e05\u695a\u7684\u770b\u89c1\u5f53\u524d\u7ebf\u7a0b\u7684\u8c03\u7528\u4e0a\u4e0b\u6587\uff0c\u53ef\u4ee5\u5f88\u6e05\u695a\u7684\u77e5\u9053\u7a0b\u5e8f\u7684\u8fd0\u884c\u60c5\u51b5\u3002<\/p>\n \u5e76\u4e14\u6211\u4eec\u5728\u6700\u540e\u9762\u8fd8\u80fd\u770b\u89c1\u5f53\u524d\u865a\u62df\u673a\u4e2d\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u9752\u5e74\u4e16\u4ee3\uff0c\u8001\u5e74\u4e16\u4ee3\u7684\u4fe1\u606f\u7b49\u7b49\u2026<\/p>\n PS: \u5728JDK1.5\u4ee5\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728Java\u7a0b\u5e8f\u4e2d\u8c03\u7528Thread.getStackTrace()\u65b9\u6cd5\u6765\u8fdb\u884c\u5806\u6808\u7684\u81ea\u52a8\u6253\u5370\uff0c\u4f7f\u5f97\u7ebf\u7a0b\u5806\u6808\u7684\u6253\u5370\u65f6\u673a\u53ef\u7f16\u7a0b\u63a7\u5236\u3002<\/p>\n \u6587\u7ae0\u77e5\u8bc6\u70b9\u4e0e\u5b98\u65b9\u77e5\u8bc6\u6863\u6848\u5339\u914d<\/p>\n Java\u6280\u80fd\u6811\u9996\u9875\u6982\u89c8<\/p>\n 89841 \u4eba\u6b63\u5728\u7cfb\u7edf\u5b66\u4e60\u4e2d<\/p>\n \u70b9\u51fb\u9605\u8bfb\u5168\u6587 <\/p>\n \u6253\u5f00CSDN\uff0c\u9605\u8bfb\u4f53\u9a8c\u66f4\u4f73<\/p>\n jstack-\u67e5\u770bJava\u8fdb\u7a0b\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f,\u9501\u5b9a\u9ad8\u6d88\u8017\u8d44\u6e90\u4ee3\u7801<\/p>\n jstack\u4e3b\u8981\u7528\u6765\u67e5\u770b\u67d0\u4e2aJava\u8fdb\u7a0b\u5185\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b: jstackpid jstackexecutable core jstackremote-hostname-or-ip \u547d\u4ee4\u884c\u53c2\u6570\u9009\u9879\u8bf4\u660e\u5982\u4e0b: \u2026<\/p>\n<\/p>\n 011Java\u5e76\u53d1\u5305018\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f_\u6267\u7b14\u672a\u6765\u7684\u535a\u5ba2<\/p>\n java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088) java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809) java.util.concurre\u2026<\/p>\n \u6700\u65b0\u53d1\u5e03 jstack \u2014 java\u5806\u6808\u5e38\u7528\u6392\u67e5\u6307\u4ee4<\/p>\n jstack \u2014 java\u5806\u6808\u5e38\u7528\u6392\u67e5\u6307\u4ee4<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n \u70ed\u95e8\u63a8\u8350 jstack \u547d\u4ee4\u67e5\u770bJAVA\u7ebf\u7a0b\u5806\u6808<\/p>\n JAVA\u5806\u6808\u4fe1\u606f\u5b9e\u9645\u751f\u4ea7\u4e2d\uff0c\u53ef\u80fd\u7531\u4e8e\u5f00\u53d1\u4ee5\u53ca\u6d4b\u8bd5\u672a\u80fd\u5168\u9762\u8986\u76d6\u7684\u4ee3\u7801\u8d28\u91cf\u3001\u6027\u80fd\u95ee\u9898\uff0c\u800c\u5f15\u81f4\u7ebf\u7a0b\u6302\u8d77\u751a\u81f3\u5d29\u6e83\u3002\u53ef\u80fd\u5c31\u9700\u8981\u67e5\u770b\u5806\u6808\u4fe1\u606f\u6765\u6392\u67e5\u95ee\u9898\u4e86\u3002jps -lvmjps -lvm \u7528\u4e8e\u67e5\u770b\u5f53\u524d\u673a\u5668\u4e0a\u8fd0\u884c\u7684java\u8fdb\u7a0b\u3002C:\\Users\\Administrator>jps -lvmDosgi.requiredJavaVersion=1.8 -Dosgi.instance.area.defa<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n Java\u591a\u7ebf\u7a0b\u2014\u2014\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f<\/p>\n Java\u591a\u7ebf\u7a0b\u2014\u2014\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f \u6458\u8981\uff1a\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e86\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u7684\u65b9\u6cd5\u3002 \u4f7f\u7528Thread\u7c7b\u7684getAllStackTraces()\u65b9\u6cd5 \u65b9\u6cd5\u5b9a\u4e49 \u53ef\u4ee5\u770b\u5230getAllStackTraces()\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2aMap\u5bf9\u8c61\uff0ckey\u662fThread\u7684\u5b9e\u4f8b\uff0cvalue\u662f\u4e00\u4e2aStackTraceElement\u5b9e\u4f8b\u6570\u7ec4\uff1a 1 public static Map\u7684\u7ebf\u7a0bCPU\u7c7b\u4f3c 1\u3001\u652f\u6301\u4e00\u952e\u5c55\u793a\u5f53\u524d\u6700\u5fd9\u7684\u524dN\u4e2a\u7ebf\u7a0b\u5e76\u6253\u5370\u5806\u6808 thread -n 3 \u6ca1\u6709\u7ebf\u7a0bID\uff0c\u5305\u542b\u8868\u793a\u4e3aJVM\u5185\u90e8\u7ebf\u7a0b\uff0c\u53c2\u8003dashboard\u547d\u4ee4\u7684\u4ecb\u7ecd\u3002 cpuUsage\u4e3a\u91c7\u6837\u95f4\u9694\u65f6\u95f4\u5185\u7ebf\u7a0b\u7684CPU\u4f7f\u7528\u7387\uff0c\u4e0edashboard\u547d\u4ee4\u7684\u6570\u636e\u4e00\u81f4\u3002 deltaTime\u4e3a\u91c7\u6837\u95f4\u9694\u65f6\u95f4\u5185\u7ebf\u7a0b\u7684\u589e\u91cfCPU\u65f6\u95f4\uff0c\u5c0f\u4e8e1ms\u65f6\u88ab\u53d6\u6574\u663e\u793a\u4e3a0ms\u3002 time\u7ebf\u7a0b\u8fd0\u884c\u603bCPU\u2026<\/p>\n<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java\u67e5\u770b\u7ebf\u7a0b\u7684\u5806\u6808\u4fe1\u606f<\/p>\n \u901a\u8fc7\u4f7f\u7528jps \u547d\u4ee4\u83b7\u53d6\u9700\u8981\u76d1\u63a7\u7684\u8fdb\u7a0b\u7684pid\uff0c\u7136\u540e\u4f7f\u7528jstackpid \u547d\u4ee4\u67e5\u770b\u7ebf\u7a0b\u7684\u5806\u6808\u4fe1\u606f\u3002 \u901a\u8fc7jstack\u547d\u4ee4\u53ef\u4ee5\u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684\u6240\u6709\u7ebf\u7a0b\u4fe1\u606f\u3002 \u6bcf\u4e2a\u7ebf\u7a0b\u5806\u4e2d\u4fe1\u606f\u4e2d\uff0c\u90fd\u53ef\u4ee5\u67e5\u770b\u5230\u7ebf\u7a0bID\u3001\u7ebf\u7a0b\u7684\u72b6\u6001\uff08wait\u3001sleep\u3001running \u7b49\u72b6\u6001\uff09\u3001\u662f\u5426\u6301\u6709\u9501\u4fe1\u606f\u7b49\u3002 jstack -l >jvm_listlocks.txt \u8f6c\u2026<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java \u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f_Java\u591a\u7ebf\u7a0b\u2014\u2014\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f<\/p>\n java\u591a\u7ebf\u7a0b\u2014\u2014\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u6458\u8981\uff1a\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e86\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u7684\u65b9\u6cd5\u3002\u4f7f\u7528thread\u7c7b\u7684getallstacktraces()\u65b9\u6cd5\u65b9\u6cd5\u5b9a\u4e49\u53ef\u4ee5\u770b\u5230getallstacktraces()\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2amap\u5bf9\u8c61\uff0ckey\u662fthread\u7684\u5b9e\u4f8b\uff0cvalue\u662f\u4e00\u4e2astacktraceelement\u5b9e\u4f8b\u6570\u7ec4\uff1a1 public static map getallstacktraces()\u4f7f\u7528\u53ef\u4ee5\u4f7f\u2026<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u5206\u6790<\/p>\n java\u5806\u6808\u4fe1\u606f\u5206\u6790<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java \u67e5\u770b\u5806\u6808_javap \u547d\u4ee4\u67e5\u770b\u5806\u6808\u4e2d\u4fe1\u606f<\/p>\n javap\u547d\u4ee4\u662f\u5bf9.java\u6587\u4ef6\u8fdb\u884c\u53cd\u7f16\u8bd1\uff0c\u901a\u8fc7\u8fd9\u4e2a\u547d\u4ee4\u53ef\u4ee5\u770b\u5230\u5806\u6808\u4e2d\u662f\u600e\u4e48\u538b\u6808\u548c\u51fa\u6808\u7684\u5df2\u7ecf\u6267\u884c\u987a\u5e8f\uff0c\u8fd9\u91cc\u7b80\u5355\u89e3\u91ca\u4e0bjavap\u7684\u7b80\u5355\u7684\u4f7f\u7528\uff0c\u4e0b\u9762\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u9898\u76ee\uff1ai++ \u548c++i\u7684\u533a\u522b\u89e3\u91ca\uff1a\u7b80\u5355\u70b9\u8bf4 \u8fd9\u4e2a\u95ee\u9898\u90fd\u4e0d\u96be\u56de\u7b54\uff0c\u8fd9\u91cc\u5c31\u4e0d\u8bf4\u4e86\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u5806\u6808\u4e2d\u533a\u522b\u4e5f\u662f\u8001\u5927\u4e86(\u8fd9\u91cc\u5c31\u7528\u5230\u4e86javap\u547d\u4ee4)\uff0c \u6b65\u9aa4\uff1a1.\u5728\u4efb\u610f\u4e00\u4e2a\u76d8\u4e0b\u9762\u5efa\u4e00\u4e2a\u540d\u4e3aTest.java\u7684\u6587\u4ef6(\u6587\u4ef6\u540d\u53ef\u4ee5\u968f\u610f\u547d\u540d)\u4ee3\u7801\u5982\u4e0b\uff1apublic\u2026<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java \u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f_jstack-\u67e5\u770bJava\u8fdb\u7a0b\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\uff0c\u9501\u5b9a\u9ad8\u6d88\u8017\u8d44\u6e90\u4ee3\u7801\u3002\u2026<\/p>\n jstack\u4e3b\u8981\u7528\u6765\u67e5\u770b\u67d0\u4e2aJava\u8fdb\u7a0b\u5185\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1ajstackpidjstackexecutablecorejstackremote-hostname-or-ip\u547d\u4ee4\u884c\u53c2\u6570\u9009\u9879\u8bf4\u660e\u5982\u4e0b\uff1a-llonglistings\uff0c\u4f1a\u6253\u5370\u51fa\u989d\u5916\u7684\u9501\u4fe1\u606f\uff0c\u5728\u53d1\u751f\u6b7b\u9501\u65f6\u53ef\u4ee5\u7528jstack-lpid\u6765\u89c2\u5bdf\u2026<\/p>\n<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java\u5806\u6808\u4fe1\u606f\u600e\u4e48\u770b_\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u600e\u4e48\u770b\uff1f \u2013 cs_person\u7684\u4e2a\u4eba\u7a7a\u95f4 \u2013 OSCHINA \u2013 \u4e2d\u6587\u5f00\u6e90\u6280\u672f\u4ea4\u6d41\u793e\u533a\u2026<\/p>\n \u4e00\u6761\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u5927\u6982\u957f\u6210\u4e0b\u9762\u8fd9\u4e2a\u6837\u5b50\uff1aRMI TCP Connection(267865)-172.16.5.25\u2033 daemon prio=10 tid=0x00007fdnid=0x55ae waiting for monitor entry java.lang.Thread.State: BLOCKED (on object m\u2026<\/p>\n<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n \u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u600e\u4e48\u770b\uff1f<\/p>\n \u4e00\u6761\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u5927\u6982\u957f\u6210\u4e0b\u9762\u8fd9\u4e2a\u6837\u5b50\uff1a RMI TCP Connection(267865)-172.16.5.25\u2033 daemon prio=10 tid=0x00007fdnid=0x55ae waiting for monitor entry <\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java\u7684\u6808\u548c\u5806<\/p>\n \u6808\u4e0e\u5806\u90fd\u662fJava\u7528\u6765\u5728Ram\u4e2d\u5b58\u653e\u6570\u636e\u7684\u5730\u65b9\u3002\u4e0eC++\u4e0d\u540c\uff0cJava\u81ea\u52a8\u7ba1\u7406\u6808\u548c\u5806\uff0c\u7a0b\u5e8f\u5458\u4e0d\u80fd\u76f4\u63a5\u5730\u8bbe\u7f6e\u6808\u6216\u5806\u3002 Java \u7684\u5806\u662f\u4e00\u4e2a\u8fd0\u884c\u65f6\u6570\u636e\u533a,\u7c7b\u7684(\u5bf9\u8c61\u4ece\u4e2d\u5206\u914d\u7a7a\u95f4\u3002\u8fd9\u4e9b\u5bf9\u8c61\u901a\u8fc7new\u3001newarray\u3001anewarray\u548cmultianewarray\u7b49\u6307\u4ee4\u5efa\u7acb\uff0c\u5b83\u4eec\u4e0d\u9700\u8981\u7a0b\u5e8f\u4ee3\u7801\u6765\u663e\u5f0f\u7684\u91ca\u653e\u3002\u5806\u662f\u7531\u5783\u573e\u56de\u6536\u6765\u8d1f\u8d23\u7684\uff0c\u5806\u7684\u4f18\u52bf\u662f\u53ef\u4ee5\u52a8\u6001\u5730\u5206\u914d\u5185\u5b58\u5927\u5c0f\uff0c\u751f\u5b58\u671f\u4e5f\u4e0d\u5fc5\u4e8b\u5148\u544a\u8bc9\u7f16\u8bd1\u5668\uff0c\u56e0\u4e3a\u5b83\u662f\u5728\u2026<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n \u67e5\u770bjava\u7ebf\u7a0b_\u3010JAVA\u3011Java\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u67e5\u770b<\/p>\n \u5982\u4f55\u83b7\u5f97\u7ebf\u7a0b\u7684\u5806\u6808\u4fe1\u606f\uff1f\u7ebf\u4e0a\u670d\u52a1\u5668cpu 100%\u4e86\uff0c\u8be5\u5982\u4f55\u6392\u67e5\u95ee\u9898\uff1f1.top\u547d\u4ee4\u67e5\u8be2\u54ea\u4e2apid\u8fdb\u7a0b\u5360\u7528cpu\u9ad8(ps -ef|grep java \u83b7\u53d6PID\u53f7)2.\u901a\u8fc7 top -Hp pid \u53ef\u4ee5\u67e5\u770b\u8be5\u8fdb\u7a0b\u4e0b\u5404\u4e2a\u7ebf\u7a0b\u7684cpu\u4f7f\u7528\u60c5\u51b5,\u83b7\u53d6\u5360\u7528cpu\u9ad8\u7684\u7ebf\u7a0bid3.\u6267\u884c\u547d\u4ee4\uff1aprintf \u201c%X\\n\u201d \u7ebf\u7a0btid(\u7528\u4e8e\u83b7\u53d6\u5360\u7528cpu\u9ad8\u7684\u7ebf\u7a0bid\u768416\u8fdb\u5236\u6570)4.\u6267\u884c\u547d\u4ee4\uff1ajstack pid \u2026<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n kill -3 java_kill -3 PID\u547d\u4ee4\u83b7\u53d6java\u5e94\u7528\u5806\u6808\u4fe1\u606f<\/p>\n \u4e00\u3001\u5e94\u7528\u573a\u666f\uff1a\u5f53linux\u670d\u52a1\u5668\u51fa\u73b0\u5f02\u5e38\u60c5\u51b5(\u54cd\u5e94\u7f13\u6162\uff0c\u8d1f\u8f7d\u6301\u7eed\u98d9\u5347)\u5e76\u4e14\u670d\u52a1\u5668\u6ca1\u6709\u5b89\u88c5\u5bf9\u5e94\u7684\u5305\u800c\u65e0\u6cd5\u4f7f\u7528jstack\u7b49\u547d\u4ee4\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528linux\u7684kill\u76f8\u5173\u547d\u4ee4\u6253\u5370\u5806\u6808\u4fe1\u606f\u3002\u547d\u4ee4\u683c\u5f0f\uff1akill -3 PID\u4e8c\u3001\u6267\u884c\u6b65\u9aa4\uff1a2.1\u3001\u83b7\u53d6java\u8fdb\u7a0b\u7684PIDps -ef|grep java\u7ed3\u679c\u7684\u7b2c\u4e8c\u5217\u6570\u5b57\u5c31\u662f\u8fdb\u7a0b\u5bf9\u5e94\u7684pid\u30022.2\u3001kill -3 PID(1)\u5982\u679c\u9879\u76ee\u901a\u8fc7Tomcat\u8fdb\u884c\u53d1\u5e03(\u666e\u901a\u2026<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n jstack \u5de5\u5177 \u67e5\u770bJVM\u5806\u6808\u4fe1\u606f<\/p>\n 1|0\u4ecb\u7ecd jstack\u662fjava\u865a\u62df\u673a\u81ea\u5e26\u7684\u4e00\u79cd\u5806\u6808\u8ddf\u8e2a\u5de5\u5177\u3002jstack\u7528\u4e8e\u6253\u5370\u51fa\u7ed9\u5b9a\u7684java\u8fdb\u7a0bID\u6216corefile\u6216\u8fdc\u7a0b\u8c03\u8bd5\u670d\u52a1\u7684Java\u5806\u6808\u4fe1\u606f\uff0c\u5982\u679c\u662f\u572864\u4f4d\u673a\u5668\u4e0a\uff0c\u9700\u8981\u6307\u5b9a\u9009\u9879\u201d-J-d64\u2033\uff0cWindows\u7684jstack\u4f7f\u7528\u65b9\u5f0f\u53ea\u652f\u6301\u4ee5\u4e0b\u7684\u8fd9\u79cd\u65b9\u5f0f\uff1a jstack pid \u4e3b\u8981\u5206\u4e3a\u4e24\u4e2a\u529f\u80fd\uff1a a\uff0e \u9488\u5bf9\u6d3b\u7740\u7684\u8fdb\u7a0b\u505a\u672c\u5730\u7684\u6216\u8fdc\u7a0b\u7684\u7ebf\u7a0bdump\uff1b b\uff0e \u9488\u5bf9core\u6587\u4ef6\u505a\u7ebf\u7a0bdump\u3002 jstack\u7528\u4e8e\u751f\u6210java\u865a\u62df\u673a\u5f53\u524d\u65f6\u523b\u7684\u7ebf\u7a0b\u5feb\u7167\u3002\u7ebf\u7a0b\u5feb\u7167\u662f\u2026<\/p>\n<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n linux\u67e5\u770bjava\u5806\u6808<\/p>\n 1\u3001\u67e5\u770bJAVA\u8fdb\u7a0bJVM\u53c2\u6570 jinfo -flags pid(\u8fdb\u7a0b\u53f7) -XX:CICompilerCount=2 \u66f4\u5927\u7684\u5e76\u884c\u7f16\u8bd1\u6570 -XX:InitialHeapSize=JVM \u7684\u521d\u59cb\u5806\u5185\u5b58\u5927\u5c0f -XX:MaxHeapSize=JVM \u7684\u66f4\u5927\u5806\u5185\u5b58\u5927\u5c0f -XX:MaxNewSize=XX:MinHeapDeltaBytes=XX:NewSize=XX:OldSize=\u3001JVM \u67e5\u770b.<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n Linux \u5982\u4f55\u67e5\u770b\u4e00\u4e2a\u8fdb\u7a0b\u7684\u5806\u6808<\/p>\n \u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4e4b\u4e00\u79cd\uff1apstack \u8fdb\u7a0bID\u7b2c\u4e8c\u79cd\uff0c\u4f7f\u7528gdb \u7136\u540eattach \u8fdb\u7a0bID\uff0c\u7136\u540e\u518d\u4f7f\u7528\u547d\u4ee4 thread apply all bt \u4e24\u79cd\u65b9\u6cd5\u90fd\u53ef\u4ee5\u5217\u51fa\u8fdb\u7a0b\u6240\u6709\u7684\u7ebf\u7a0b\u7684\u5f53\u524d\u7684\u8c03\u7528\u6808\u3002\u4e0d\u8fc7\uff0c\u4f7f\u7528gdb\u7684\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u67e5\u770b\u67d0\u4e9b\u4fe1\u606f\uff0c\u4f8b\u5982\u5c40\u90e8\u53d8\u91cf\uff0c\u6307\u9488\u7b49\u3002\u4e0d\u8fc7\uff0c\u5982\u679c\u53ea\u770b\u8c03\u7528\u6808\u7684\u8bdd\uff0cpstack\u8fd8\u662f\u5f88\u65b9\u4fbf\u7684\u3002<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n JAVA\u83b7\u53d6\u5806\u6808\u4fe1\u606f<\/p>\n 1. \u901a\u8fc7Throwable\u83b7\u53d6 StackTraceElement stackTrace = new Throwable().getStackTrace(); 2. \u901a\u8fc7Thread\u83b7\u53d6 StackTraceElement stackTrace = Thread.currentThread().getStackTrace();<\/p>\n \u7ee7\u7eed\u8bbf\u95ee<\/p>\n java \u67e5\u770b\u7ebf\u7a0b\u6808\u5927\u5c0f_\u57fa\u4e8e Java \u7ebf\u7a0b\u6808\u7684\u95ee\u9898\u6392\u67e5<\/p>\n \u7ecf\u5e38\u78b0\u5230\u7cfb\u7edf\u8dd1\u7740\u8dd1\u7740\u4e00\u6bb5\u65f6\u95f4\u5185\u5b58\u6ee1\u4e86\uff0c\u51fa\u73b0\u5185\u5b58\u6cc4\u6f0f\u7684\u95ee\u9898\uff0c\u7cfb\u7edf\u8f6f\u4ef6\u592a\u5e9e\u5927\uff0c\u8fd9\u7c7b\u95ee\u9898\u53c8\u4e0d\u597d\u76f4\u63a5\u4ece\u6e90\u7801\u4e2d\u5206\u6790\uff0c\u6240\u4ee5\u9700\u8981\u501f\u52a9\u5de5\u5177\u6765\u5206\u6790\u4e86\uff0ckmemleak\u5c31\u662f\u8fd9\u6837\u7684\u4e00\u4e2a\u5de5\u5177\u3002<\/p>\n \u5728Kernel hacking\u4e2d\u6253\u5f00CONFIG_DEBUG_KMEMLEAK =y\u5373\u4f7f\u80fd\u4e86kmemleak\uff0c\u5176\u5b9e\u5c31\u662f\u5f00\u4e86\u4e00\u4e2a\u5185\u6838\u7ebf\u7a0b\uff0c\u8be5\u5185\u6838\u7ebf\u7a0b\u6bcf10\u5206\u949f\uff08\u9ed8\u8ba4\u503c\uff09\u626b\u63cf\u5185\u5b58\uff0c\u5e76\u6253\u5370\u53d1\u73b0\u6d3e\u8010\u65b0\u7684\u672a\u5f15\u7528\u7684\u5bf9\u8c61\u7684\u6570\u91cf\u3002kmemleak\u7684\u539f\u7406\u5176\u5b9e\u5c31\u662f\u901a\u8fc7kmalloc\u3001vmalloc\u3001kmem_cache_alloc\u7b49\u5185\u5b58\u7684\u5206\u914d\uff0c\u8ddf\u8e2a\u5176\u6307\u9488\uff0c\u8fde\u540c\u5176\u4ed6\u7684\u5206\u914d\u5927\u5c0f\u548c\u5806\u6808\u8ddf\u8e2a\u4fe1\u606f\uff0c\u5b58\u50a8\u5728PRIO\u641c\u7d22\u6811\u3002\u5982\u679c\u5b58\u5728\u76f8\u5e94\u7684\u91ca\u653e\u51fd\u6570\u8c03\u7528\u8ddf\u8e2a\u548c\u6307\u9488\uff0c\u5c31\u4f1a\u4ecekmemleak\u6570\u636e\u7ed3\u6784\u4e2d\u79fb\u9664\u5c18\u6bc1\u6625\u3002\u4e0b\u9762\u6211\u4eec\u770b\u770b\u5177\u4f53\u7684\u7528\u6cd5\u3002<\/p>\n \u67e5\u770b\u5185\u6838\u6253\u5370\u4fe1\u606f\u8be6\u7ec6\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n 1\u3001\u6302\u8f7ddebugfs\u6587\u4ef6\u7cfb\u7edf<\/p>\n mount -t debugfs nodev \/sys\/kernel\/debug\/<\/p>\n 2\u3001\u5f00\u542f\u5185\u6838\u81ea\u52a8\u68c0\u6d4b\u7ebf\u7a0b<\/p>\n echo scan > \/sys\/kernel\/debug\/kmemleak<\/p>\n 3\u3001\u67e5\u770b\u6253\u5370\u4fe1\u606f<\/p>\n cat \/sys\/kernel\/debug\/kmemleak<\/p>\n 4\u3001\u6e05\u9664\u5185\u6838\u68c0\u6d4b\u62a5\u544a\uff0c\u65b0\u7684\u5185\u5b58\u6cc4\u9732\u62a5\u544a\u5c06\u91cd\u65b0\u5199\u5165\/sys\/kernel\/debug\/kmemleak<\/p>\n echo clear > \/sys\/kernel\/debug\/kmemleak<\/p>\n \u5185\u5b58\u626b\u63cf\u53c2\u6570\u53ef\u4ee5\u8fdb\u884c\u4fee\u6539\u901a\u8fc7\u5411\/sys\/kernel\/debug\/kmemleak \u6587\u4ef6\u5199\u5165\u3002 \u53c2\u6570\u4f7f\u7528\u5982\u4e0b\uff1a<\/p>\n off \u7981\u7528kmemleak\uff08\u4e0d\u53ef\u9006\uff09<\/p>\n stack=on \u542f\u7528\u4efb\u52a1\u5806\u6808\u626b\u63cf(default)<\/p>\n stack=off \u7981\u7528\u4efb\u52a1\u5806\u6808\u626b\u63cf<\/p>\n scan=on \u542f\u52a8\u81ea\u52a8\u8bb0\u5fc6\u626b\u63cf\u7ebf\u7a0b(default)<\/p>\n scan=off \u505c\u6b62\u81ea\u52a8\u8bb0\u5fc6\u626b\u63cf\u7ebf\u7a0b<\/p>\n scan= \u8bbe\u7f6en\u79d2\u5185\u81ea\u52a8\u8bb0\u5fc6\u626b\u63cf\uff0c\u9ed8\u8ba4600s<\/p>\n scan \u5f00\u542f\u5185\u6838\u626b\u63cf<\/p>\n clear \u6e05\u9664\u5185\u5b58\u6cc4\u9732\u62a5\u544a<\/p>\n dump= \u8f6c\u5b58\u4fe1\u606f\u5bf9\u8c61\u5728<\/p>\n \u901a\u8fc7\u201ckmemleak = off\u201d\uff0c\u4e5f\u53ef\u4ee5\u5728\u542f\u52a8\u65f6\u7981\u7528Kmemleak\u5728\u5185\u6838\u547d\u4ee4\u884c\u3002\u5728\u521d\u59cb\u5316kmemleak\u4e4b\u524d\uff0c\u5185\u5b58\u7684\u5206\u914d\u6216\u91ca\u653e\u8fd9\u4e9b\u52a8\u4f5c\u88ab\u5b58\u50a8\u5728\u4f59\u5f0a\u4e00\u4e2a\u524d\u671f\u65e5\u5fd7\u7f13\u51b2\u533a\u3002\u8fd9\u4e2a\u7f13\u51b2\u533a\u7684\u5927\u5c0f\u901a\u8fc7\u914dCONFIG_DEBUG_KMEMLEAK_EAR_LOG_SIZE\u8bbe\u7f6e\u3002<\/p>\n \u5173\u4e8elinux dump\u5806\u6808\u4fe1\u606f\u7684\u4ecb\u7ecd\u5230\u6b64\u5c31\u7ed3\u675f\u4e86\uff0c\u4e0d\u77e5\u9053\u4f60\u4ece\u4e2d\u627e\u5230\u4f60\u9700\u8981\u7684\u4fe1\u606f\u4e86\u5417 \uff1f\u5982\u679c\u4f60\u8fd8\u60f3\u4e86\u89e3\u66f4\u591a\u8fd9\u65b9\u9762\u7684\u4fe1\u606f\uff0c\u8bb0\u5f97\u6536\u85cf\u5173\u6ce8\u672c\u7ad9\u3002<\/p>\n\n
Linux\u91cc\u9762\u4ec0\u4e48\u662fdump\u7ebf\u7a0b\uff1f<\/h3>\n
kill-3\u751f\u6210\u7684\u7ebf\u7a0b\u5806\u6808\u600e\u4e48\u67e5\u770b<\/h3>\n
linux\u5185\u6838\u5185\u5b58\u6cc4\u9732\u68c0\u6d4b<\/h3>\n