# 1. gdb coredump分析

  本文介绍ubuntu系统环境下coredump文件的分析方法。

## 1.1. coredump文件生成路径查询

```
$ cat /proc/sys/kernel/core_pattern
|/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E
```

**发现路径下并未生成coredump文件**

```
$ ulimit -a
core file size          (blocks, -c) 0  // 0表示终端未开启core dump
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 63499
max locked memory       (kbytes, -l) 65536
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) 63499
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
```

解决：
```
$ ulimit -c unlimited
```

sudo echo /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/cmake-shell/core.%e.%p> /proc/sys/kernel/core_pattern