【48】gdb 查看core堆栈信息

柔情只为你懂 2023-06-27 03:52 14阅读 0赞

1、查看系统资源设置情况  
用户态程序Segmentation fault会生成core文件，如果没有生成core文件，则使用ulimit命令显示系统资源的设置，看看core文件大小设置，可以看到现在core file size是0，无法生成core文件  
root@cd-106:~/pcieinject\# ulimit  
unlimited  
root@cd-106:~/pcieinject\# ulimit -a  
**core file size (blocks, -c) 0**  
data seg size (kbytes, -d) unlimited  
scheduling priority (-e) 0  
file size (blocks, -f) unlimited  
pending signals (-i) 319992  
max locked memory (kbytes, -l) 64  
max memory size (kbytes, -m) unlimited  
open files (-n) 1024  
pipe size (512 bytes, -p) 8  
POSIX message queues (bytes, -q) 819200  
real-time priority (-r) 0  
stack size (kbytes, -s) 8192  
cpu time (seconds, -t) unlimited  
max user processes (-u) 319992  
virtual memory (kbytes, -v) unlimited  
file locks (-x) unlimited  
2、设置core file size为unlimited  
**root@cd-106:~/pcieinject\# ulimit -c unlimited  
root@cd-106:~/pcieinject\# ulimit -a**  
core file size (blocks, -c) unlimited  
data seg size (kbytes, -d) unlimited  
scheduling priority (-e) 0  
file size (blocks, -f) unlimited  
pending signals (-i) 319992  
max locked memory (kbytes, -l) 64  
max memory size (kbytes, -m) unlimited  
open files (-n) 1024  
pipe size (512 bytes, -p) 8  
POSIX message queues (bytes, -q) 819200  
real-time priority (-r) 0  
stack size (kbytes, -s) 8192  
cpu time (seconds, -t) unlimited  
max user processes (-u) 319992  
virtual memory (kbytes, -v) unlimited  
file locks (-x) unlimited

3、执行用户态程序，生成core文件  
Segmentation fault (core dumped)  
root@cd-106:~/pcieinject\# ll  
total 716  
drwxr-xr-x 6 root root 4096 Jan 3 09:45 ./  
drwx------ 25 root root 4096 Jan 2 21:03 …/  
drwxr-xr-x 2 root root 4096 Dec 25 10:52 comlib/  
**-rw------- 1 root root 602112 Jan 3 09:45 core**

4、解析core文件  
root@cd-106:~/pcieinject\# gdb pcieinject core  
使用backtrace或者bt找到调用栈  
(gdb) bt

参考  
https://blog.csdn.net/u013283985/article/details/80620237  
https://www.cnblogs.com/schips/p/10735807.html  
https://baijiahao.baidu.com/s?id=1599347824327158577&wfr=spider&for=pc