记一次core文件处理记录数据库中无辜多生成core文件

admin

[root@controller1 _data]# file core.225
core.225: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from '/usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql/ --plugin-dir=/usr/', real uid: 42434, effective uid: 42434, real gid: 42434, effective gid: 42434, execfn: '/usr/libexec/mysqld', platform: 'x86_64'

admin

[root@controller2 _data]# yum provides gdb
' \% k! f* L% O! W6 r  x' sLoaded plugins: fastestmirror
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
Determining fastest mirrors
  ^9 F' j5 ~% `% j * base: mirrors.aliyun.com
6 t, r; ~/ @  |! ?6 m * epel: mirrors.bfsu.edu.cn
* extras: mirrors.aliyun.com
  p& t- {0 v/ O, {! c8 }9 V * updates: mirrors.bfsu.edu.cn
2 I) g% T4 X9 w0 l3 f. \& hgdb-7.6.1-120.el7.x86_64 : A GNU source-level debugger for C, C++, Fortran, Go and other languages
( T" A( A# H5 `$ A- v" I% ORepo        : base

+ \: c8 r9 {$ o# {" V  s/ ^' C安装gdb包：
+ u2 n! ]0 K* P7 I8 S
' ?3 ]1 G3 X) O' c  c- E
2 k/ |8 [5 D0 y2 s[root@controller2 _data]# yum install -y gdb
4 W4 c5 z& i7 B* \" T5 q

admin

在/etc/profile文件中有这样一行
; ^1 F: A' g$ _3 W
ulimit -S -c 0 > /dev/null 2>&1
/ P( n/ Y, ^9 ~4 _  _! e
[root@controller2 _data]# source /etc/profile

) N/ K1 f$ {4 A. i在/etc/profile文件中有这样一行

ulimit -c unlimited
/ z& N8 e- Q9 k3 L# \#ulimit -S -c 0 > /dev/null 2>&1
" N% q  l% H5 s* \+ F9 ~, B0 p
4 u8 e6 [& x  G[root@controller2 _data]# source /etc/profile

9 a& E7 g8 t& M1 C3 Y[root@controller2 _data]# ulimit -c
unlimited

admin

[root@controller2 _data]# gdb test core.226
! B4 Q* ]/ K" Y+ Z1 f: {7 gGNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-120.el7
Copyright (C) 2013 Free Software Foundation, Inc.
5 c  V, @0 L4 ULicense 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.
% V' y# D4 _* g& bThere 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".
* V: U& C' g/ d: k8 I4 C1 l; OFor bug reporting instructions, please see:
# d4 {( R" L' {& [: }<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/test...Reading symbols from /usr/bin/test...(no debugging symbols found)...done.
% I" b% P1 H) F4 y3 ](no debugging symbols found)...done.
1 N( j' m2 q8 w% }  {
) U" x7 F8 N3 }; @/ }' d2 Swarning: core file may not match specified executable file.
8 t4 l5 [8 M5 g4 I* f: x' }[New LWP 226]
2 X" X9 _- y% a7 t  {[New LWP 16975]
/ @+ d2 |* y* S# o% s[New LWP 630]
[New LWP 640]
+ o: m3 W9 P. R: E5 _; m+ B  O[New LWP 622]
[New LWP 231]
[New LWP 624]
8 d0 o, \; j$ w9 x( K( Z[New LWP 641]
[New LWP 628]
[New LWP 17062]
[New LWP 15193]
[New LWP 16937]
[New LWP 634]
[New LWP 15630]
[New LWP 15095]
[New LWP 14760]
[New LWP 15194]
[New LWP 12240]
[New LWP 15592]
+ E3 }, z3 L! S1 P3 g3 w[New LWP 15788]
7 u4 e7 _8 t6 I4 o2 c9 @4 M# h[New LWP 16208]
9 w: S9 ]7 ?; \; {; Z. \[New LWP 12674]
6 U- v- c8 o4 o& Y* n7 V0 E1 [[New LWP 16334]
[New LWP 12886]
[New LWP 14746]
( A1 ^  g! P3 [4 Z( L[New LWP 13495]
[New LWP 645]
[New LWP 643]
[New LWP 229]
[New LWP 619]
[New LWP 14269]
4 @& v* A9 X) U0 r' L[New LWP 14266]
' w5 G7 m* q' k/ P5 \; T[New LWP 14245]
4 ?& s/ R& j1 C" F[New LWP 14201]
[New LWP 13824]
[New LWP 13834]
  X* U& X/ T$ z4 x$ D7 J% b7 g[New LWP 14093]
[New LWP 13492]
[New LWP 12825]
! G1 C, v4 t  _8 ^" r[New LWP 11905]
' w/ y- S3 m9 ~0 b' P4 u& q[New LWP 11802]
[New LWP 11783]
2 x' Q3 j* }0 n, X# M[New LWP 639]
[New LWP 232]
8 q, Q* J3 e7 i0 s+ t  m[New LWP 631]
$ e5 Q* F! \/ U1 H- y$ D' q: A0 P' n[New LWP 626]
; g+ q+ S- R7 a; j$ `2 M[New LWP 11692]
: R7 H* d% }+ s' k[New LWP 11873]
# x" D; X9 }! d. L/ D% c5 T* Q[New LWP 15303]
[New LWP 15496]
[New LWP 230]
[New LWP 646]
* P; |* q* v, _8 T- e7 ?[New LWP 17008]
[New LWP 618]
( _7 Y' j$ }$ I1 ~[New LWP 623]
[New LWP 625]
$ K& S6 b1 ~6 i# i[New LWP 627]
0 [9 M' j& X$ s1 |8 P[New LWP 633]
) n$ m' O4 Y' h9 ?. W[New LWP 637]
[New LWP 638]
, n0 m( z$ z1 o! N  K+ b( l[New LWP 16508]
[New LWP 228]
; }7 W/ M1 }# l+ {. |' z[New LWP 632]
" l$ k/ z! q& v. f* O[New LWP 16618]
( u- W: t$ \* }/ L6 s6 K% g  |[New LWP 14913]
$ E. f& |8 G( I& G% k7 T9 }[New LWP 15688]
[New LWP 13122]
$ K6 m7 y4 d- s5 l[New LWP 16516]
[New LWP 13185]
[New LWP 16963]
[New LWP 14400]
; V6 k. \  }' U& n! K0 q' a  U[New LWP 15685]
[New LWP 14698]
[New LWP 12576]
  v4 v6 s  k  u  w[New LWP 13929]
9 v# o" i# z7 u$ n; C  ~+ n[New LWP 11930]
6 a* {& I! W8 l! |$ e[New LWP 12281]
[New LWP 12630]
( P3 |8 w; F3 ?$ O# V[New LWP 12148]
[New LWP 12259]
[New LWP 12965]
[New LWP 13502]
$ Q" D2 z% y1 t[New LWP 13624]
$ t* L7 ]% t$ G- G1 Z3 h  H[New LWP 13666]
; t* O4 i' X5 o+ f2 k0 j[New LWP 642]
5 p: Y% Z3 L, s[New LWP 644]
[New LWP 11863]
  h9 E$ a. \% ?2 G- X[New LWP 12152]
[New LWP 11901]
$ s7 B2 i5 n. M9 f$ s[New LWP 12090]
$ z0 @2 B' Z% Q1 [% V. m  ][New LWP 15150]
8 T" ]1 w4 n( a+ n0 k& z[New LWP 15011]
9 j4 f6 C+ J( U2 h% G3 H3 q$ f0 ~[New LWP 14226]
[New LWP 635]
[New LWP 15060]
[New LWP 636]
! C/ g2 C/ Z! H2 M( _) P/ N/ Z! u. x[New LWP 227]
[New LWP 621]
[New LWP 620]
[New LWP 13689]
Core was generated by `/usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql/ --plugin-dir=/usr/'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f26fd80e38d in ?? ()
Missing separate debuginfos, use: debuginfo-install coreutils-8.22-24.el7.x86_64


(gdb) bt
#0  0x00007f26fd80e38d in ?? ()
" M) C$ W( Z& M4 R* o#1  0x0000000000000000 in ?? ()
( y; |  e/ q. b- e5 U: J(gdb) where
#0  0x00007f26fd80e38d in ?? ()
0 G) q6 i8 ~7 |! p/ L#1  0x0000000000000000 in ?? ()
(gdb)