Linux如何查看進程棧信息示例
發(fā)布日期：2022-04-12 12:28 | 文章來源：腳本之家
今天在Linux上調(diào)試程序程序的時候發(fā)現(xiàn)有時候程序會莫名其妙的hang住，于是就想能不能找到當時程序有那些線程，都在做什么。找了一下linux命令，還真可以滿足我的需求。下面看一個小例子。
先準備一段程序，為了簡單起見這里使用python來寫，其中創(chuàng)建了兩個線程來執(zhí)行各自的任務(wù)。
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)
然后運行這個程序
$ python test.py
先使用 “pstree -apl ” 查看進程結(jié)構(gòu)
$ pstree -apl 26855
python,26855 test.py
|-{python},26858
|-{python},26859
然后使用 “ps -Lf ” 查看線程信息
$ 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 ” 查看線程的詳細信息，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 ()
這里多說一句，如果要看java程序的棧信息，可以使用 “kill -3 ” 來查看，比如：
$ nohub java Test > test.out & $ kill -3 <pid>
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