Question

我的公司服务器应用程序遇到问题。我无法杀死它，因为我认为我下次无法重现此错误。所以我想知道如何获得有关此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。

如何知道现在正在执行哪个程序？

Answer 1

您可以使用gdb --pid=PID调试流程，backtrace将为您提供堆栈跟踪以查找功能。

--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>
This is free software: you are free to change and redistribute it.
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/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
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)

linux程序没有回答。我怎么知道哪个例程导致冻结？

1 个答案: