Linux如何查看进程栈信息示例
<p>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。</p>
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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。</p>
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<code class="py keyword">import</code> <code class="py plain">threading</code>
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<code class="py keyword">import</code> <code class="py plain">time</code>
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<code class="py keyword">def</code> <code class="py plain">test1():</code>
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<code class="py spaces"> </code><code class="py keyword">while</code><code class="py plain">(</code><code class="py color1">True</code><code class="py plain">):</code>
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<code class="py spaces"> </code><code class="py plain">time.sleep(</code><code class="py value">1</code><code class="py plain">)</code>
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<code class="py spaces"> </code><code class="py functions">print</code> <code class="py string">'test1'</code>
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<code class="py keyword">def</code> <code class="py plain">test2():</code>
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<code class="py spaces"> </code><code class="py keyword">while</code><code class="py plain">(</code><code class="py color1">True</code><code class="py plain">):</code>
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<code class="py spaces"> </code><code class="py plain">time.sleep(</code><code class="py value">1</code><code class="py plain">)</code>
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<code class="py spaces"> </code><code class="py functions">print</code> <code class="py string">'test2'</code>
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<code class="py plain">t1 </code><code class="py keyword">=</code> <code class="py plain">threading.Thread(target</code><code class="py keyword">=</code><code class="py plain">test1, args</code><code class="py keyword">=</code><code class="py plain">())</code>
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<code class="py plain">t2 </code><code class="py keyword">=</code> <code class="py plain">threading.Thread(target</code><code class="py keyword">=</code><code class="py plain">test2, args</code><code class="py keyword">=</code><code class="py plain">())</code>
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<code class="py plain">t1.start()</code>
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<code class="py plain">t2.start()</code>
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<code class="py plain">time.sleep(</code><code class="py value">12345</code><code class="py plain">)</code>
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然后运行这个程序</p>
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<code class="plain plain">$ python test.py</code>
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<p>
先使用 “pstree -apl ” 查看进程结构</p>
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<code class="plain plain">$ pstree -apl 26855</code>
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<code class="plain plain">python,26855 test.py</code>
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<code class="plain spaces"> </code><code class="plain plain">|-{python},26858</code>
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<code class="plain spaces"> </code><code class="plain plain">|-{python},26859</code>
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然后使用 “ps -Lf ” 查看线程信息</p>
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<code class="plain plain">$ ps -Lf 26855</code>
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<code class="plain plain">UID PID PPID LWP C NLWP STIME TTY STAT TIME CMD</code>
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<code class="plain plain">jhadmin 26855 25902 26855 0 3 15:15 pts/5 Sl+ 0:00 python test.py</code>
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<code class="plain plain">jhadmin 26855 25902 26858 0 3 15:15 pts/5 Sl+ 0:00 python test.py</code>
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<code class="plain plain">jhadmin 26855 25902 26859 0 3 15:15 pts/5 Sl+ 0:00 python test.py</code>
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<p>
最后，可以使用 “pstack ” 查看线程的详细信息，如下：</p>
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<code class="plain plain">$ pstack 26855</code>
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<code class="plain plain">Thread 3 (Thread 0x7f8a344f2700 (LWP 26858)):</code>
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<code class="plain plain">#0 0x00007f8a3b5387a3 in select () from /lib64/libc.so.6</code>
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<code class="plain plain">#1 0x00007f8a344f5070 in time_sleep () from /usr/lib64/python2.7/lib-dynload/timemodule.so</code>
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<code class="plain plain">#2 0x00007f8a3c215af0 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#3 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#4 0x00007f8a3c1a188d in function_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#5 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#6 0x00007f8a3c2104fd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#7 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#8 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#9 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#10 0x00007f8a3c1a1798 in function_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#11 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#12 0x00007f8a3c18b8d5 in instancemethod_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#13 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#14 0x00007f8a3c20e6f7 in PyEval_CallObjectWithKeywords () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#15 0x00007f8a3c2465c2 in t_bootstrap () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#16 0x00007f8a3bf1ce25 in start_thread () from /lib64/libpthread.so.0</code>
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<code class="plain plain">#17 0x00007f8a3b54134d in clone () from /lib64/libc.so.6</code>
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<code class="plain plain">Thread 2 (Thread 0x7f8a33cf1700 (LWP 26859)):</code>
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<code class="plain plain">#0 0x00007f8a3b5387a3 in select () from /lib64/libc.so.6</code>
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<code class="plain plain">#1 0x00007f8a344f5070 in time_sleep () from /usr/lib64/python2.7/lib-dynload/timemodule.so</code>
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<code class="plain plain">#2 0x00007f8a3c215af0 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#3 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#4 0x00007f8a3c1a188d in function_call () from /lib64/libpython2.7.so.1.0 </code>
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<code class="plain plain">#5 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0 </code>
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<code class="plain plain">#6 0x00007f8a3c2104fd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 </code>
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<code class="plain plain">#7 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 </code>
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<code class="plain plain">#8 0x00007f8a3c2154bd in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 </code>
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<code class="plain plain">#9 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#10 0x00007f8a3c1a1798 in function_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#11 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#12 0x00007f8a3c18b8d5 in instancemethod_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#13 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#14 0x00007f8a3c20e6f7 in PyEval_CallObjectWithKeywords () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#15 0x00007f8a3c2465c2 in t_bootstrap () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#16 0x00007f8a3bf1ce25 in start_thread () from /lib64/libpthread.so.0</code>
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<code class="plain plain">#17 0x00007f8a3b54134d in clone () from /lib64/libc.so.6</code>
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<code class="plain plain">Thread 1 (Thread 0x7f8a3c6f3740 (LWP 26855)):</code>
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<code class="plain plain">#0 0x00007f8a3bf22a0b in do_futex_wait.constprop.1 () from /lib64/libpthread.so.0</code>
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<code class="plain plain">#1 0x00007f8a3bf22a9f in __new_sem_wait_slow.constprop.0 () from /lib64/libpthread.so.0</code>
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<code class="plain plain">#2 0x00007f8a3bf22b3b in sem_wait@@GLIBC_2.2.5 () from /lib64/libpthread.so.0</code>
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<code class="plain plain">#3 0x00007f8a3c242535 in PyThread_acquire_lock () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#4 0x00007f8a3c2461c2 in lock_PyThread_acquire_lock () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#5 0x00007f8a3c215af0 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#6 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#7 0x00007f8a3c21533c in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#8 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#9 0x00007f8a3c21533c in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#10 0x00007f8a3c217e3d in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#11 0x00007f8a3c1a1798 in function_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#12 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#13 0x00007f8a3c18b8d5 in instancemethod_call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#14 0x00007f8a3c17c8e3 in PyObject_Call () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#15 0x00007f8a3c17c9c5 in call_function_tail () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#16 0x00007f8a3c17ccfb in PyObject_CallMethod () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#17 0x00007f8a3c232f29 in Py_Finalize () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#18 0x00007f8a3c244325 in Py_Main () from /lib64/libpython2.7.so.1.0</code>
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<code class="plain plain">#19 0x00007f8a3b46ac05 in __libc_start_main () from /lib64/libc.so.6</code>
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<code class="plain plain">#20 0x000000000040071e in _start ()</code>
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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：</p>
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<code class="plain plain">$ nohub java Test > test.out &</code>
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<code class="plain plain">$ kill -3 <pid></code>
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。</p>
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原文链接：https://blog.csdn.net/kongxx/article/details/79662490</p>
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