Linux如何查看进程栈信息示例

今天在Linux上调试程序程序的时候发现有时候程序会莫名其妙的hang住,于是就想能不能找到当时程序有那些线程,都在做什么。找了一下linux命令,还真可以满足我的需求。下面看一个小例子。

先准备一段程序,为了简单起见这里使用python来写,其中创建了两个线程来执行各自的任务。

import threading

import time

def test1():

while(True):

time.sleep(1)

print 'test1'

def test2():

while(True):

time.sleep(1)

print 'test2'

t1 = threading.Thread(target=test1, args=())

t2 = threading.Thread(target=test2, args=())

t1.start()

t2.start()

time.sleep(12345)

然后运行这个程序

$ python test.py

先使用 “pstree -apl ” 查看进程结构

$ pstree -apl 26855

python,26855 test.py

|-{python},26858

|-{python},26859

然后使用 “ps -Lf ” 查看线程信息

$ ps -Lf 26855

UID PID PPID LWP C NLWP STIME TTY STAT TIME CMD

jhadmin 26855 25902 26855 0 3 15:15 pts/5 Sl+ 0:00 python test.py

jhadmin 26855 25902 26858 0 3 15:15 pts/5 Sl+ 0:00 python test.py

jhadmin 26855 25902 26859 0 3 15:15 pts/5 Sl+ 0:00 python test.py

最后,可以使用 “pstack ” 查看线程的详细信息,如下:

$ pstack 26855

Thread 3 (Thread 0x7f8a344f2700 (LWP 26858)):

#0 0x00007f8a3b5387a3 in select () from /lib64/libc.so.6

#1 0x00007f8a344f5070 in time_sleep () from /usr/lib64/python2.7/lib-dynload/timemodule.so

#2 0x00007f8a3c215af0 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#3 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#4 0x00007f8a3c1a188d in function_call () from /lib64/libpython2.7.so.1.0

#5 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#6 0x00007f8a3c2104fd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#7 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#8 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#9 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#10 0x00007f8a3c1a1798 in function_call () from /lib64/libpython2.7.so.1.0

#11 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#12 0x00007f8a3c18b8d5 in instancemethod_call () from /lib64/libpython2.7.so.1.0

#13 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#14 0x00007f8a3c20e6f7 in PyEval_CallObjectWithKeywords () from /lib64/libpython2.7.so.1.0

#15 0x00007f8a3c2465c2 in t_bootstrap () from /lib64/libpython2.7.so.1.0

#16 0x00007f8a3bf1ce25 in start_thread () from /lib64/libpthread.so.0

#17 0x00007f8a3b54134d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f8a33cf1700 (LWP 26859)):

#0 0x00007f8a3b5387a3 in select () from /lib64/libc.so.6

#1 0x00007f8a344f5070 in time_sleep () from /usr/lib64/python2.7/lib-dynload/timemodule.so

#2 0x00007f8a3c215af0 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#3 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#4 0x00007f8a3c1a188d in function_call () from /lib64/libpython2.7.so.1.0

#5 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#6 0x00007f8a3c2104fd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#7 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#8 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#9 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#10 0x00007f8a3c1a1798 in function_call () from /lib64/libpython2.7.so.1.0

#11 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#12 0x00007f8a3c18b8d5 in instancemethod_call () from /lib64/libpython2.7.so.1.0

#13 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#14 0x00007f8a3c20e6f7 in PyEval_CallObjectWithKeywords () from /lib64/libpython2.7.so.1.0

#15 0x00007f8a3c2465c2 in t_bootstrap () from /lib64/libpython2.7.so.1.0

#16 0x00007f8a3bf1ce25 in start_thread () from /lib64/libpthread.so.0

#17 0x00007f8a3b54134d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f8a3c6f3740 (LWP 26855)):

#0 0x00007f8a3bf22a0b in do_futex_wait.constprop.1 () from /lib64/libpthread.so.0

#1 0x00007f8a3bf22a9f in __new_sem_wait_slow.constprop.0 () from /lib64/libpthread.so.0

#2 0x00007f8a3bf22b3b in sem_wait@@GLIBC_2.2.5 () from /lib64/libpthread.so.0

#3 0x00007f8a3c242535 in PyThread_acquire_lock () from /lib64/libpython2.7.so.1.0

#4 0x00007f8a3c2461c2 in lock_PyThread_acquire_lock () from /lib64/libpython2.7.so.1.0

#5 0x00007f8a3c215af0 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#6 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#7 0x00007f8a3c21533c in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#8 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#9 0x00007f8a3c21533c in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0

#10 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0

#11 0x00007f8a3c1a1798 in function_call () from /lib64/libpython2.7.so.1.0

#12 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#13 0x00007f8a3c18b8d5 in instancemethod_call () from /lib64/libpython2.7.so.1.0

#14 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0

#15 0x00007f8a3c17c9c5 in call_function_tail () from /lib64/libpython2.7.so.1.0

#16 0x00007f8a3c17ccfb in PyObject_CallMethod () from /lib64/libpython2.7.so.1.0

#17 0x00007f8a3c232f29 in Py_Finalize () from /lib64/libpython2.7.so.1.0

#18 0x00007f8a3c244325 in Py_Main () from /lib64/libpython2.7.so.1.0

#19 0x00007f8a3b46ac05 in __libc_start_main () from /lib64/libc.so.6

#20 0x000000000040071e in _start ()

这里多说一句,如果要看java程序的栈信息,可以使用 “kill -3 ” 来查看,比如:

$ nohub java Test > test.out &

$ kill -3 <pid>

以上是 Linux如何查看进程栈信息示例 的全部内容, 来源链接: utcz.com/z/319222.html

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