linux 程序没有应答。我怎么知道哪个例程导致了冻结？

Question

我的公司服务器应用程序遇到问题。 我无法杀死它，因为我认为下次我将无法重现此错误。 所以我想知道如何获得有关该程序冻结原因的最大信息，包括但不限于其中的函数或例程。

如何知道当前正在执行哪个程序？

Answer 1

您可以使用

gdb --pid=PID

调试进程，并且

backtrace

将为您提供堆栈跟踪以找出该函数。

--pid=PID          Attach to running process PID.

sleep

的示例

$ sleep 1000 &
[2] 13221
$ gdb --pid=13221
GNU gdb (GDB) Fedora 7.7.1-13.fc20
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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Attaching to process 13221
Reading symbols from /usr/bin/sleep...Reading symbols from /usr/bin/sleep...(no debugging symbols found)...done.
(no debugging symbols found)...done.
Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
0x0000003122abc970 in __nanosleep_nocancel () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install coreutils-8.21-21.fc20.x86_64
(gdb) backtrace 
#0  0x0000003122abc970 in __nanosleep_nocancel () from /lib64/libc.so.6
#1  0x00000000004040cf in rpl_nanosleep ()
#2  0x0000000000403f30 in xnanosleep ()
#3  0x00000000004018ed in main ()
(gdb)