linux程序不回答。我怎么知道是哪个程序导致了冻结？

Question

我的公司服务器应用程序出现问题。 我不能杀死它，因为我认为我下次将无法重现此错误。 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。

如何知道当前正在执行哪个程序？

Answer 1

您可以使用gdb --pid=PID 调试进程，backtrace 会为您提供堆栈跟踪以找出函数。

--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
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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)