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
  G4 b& n7 \7 C# V2 ~" Dcore.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'
( O6 l% A$ _1 Z$ r' z

admin

[root@controller2 _data]# yum provides gdb
5 L* d8 V9 ~# g" I9 z1 C1 m. |" dLoaded plugins: fastestmirror
) ^" z4 h" o* ^9 p* V" F0 m' W2 ?Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
, G! e6 z2 }8 Q; }( hDetermining fastest mirrors
* base: mirrors.aliyun.com
* epel: mirrors.bfsu.edu.cn
( S% r* l: u: h4 y( m# @( ?( w * extras: mirrors.aliyun.com
5 L* `0 C: a% e- _ * updates: mirrors.bfsu.edu.cn
gdb-7.6.1-120.el7.x86_64 : A GNU source-level debugger for C, C++, Fortran, Go and other languages
- k; L/ B" L- g5 RRepo        : base
' ^+ |' B) \$ K) E5 c1 P
安装gdb包：

; O2 S) ?) D6 t0 ]( n5 O% u( K" z2 T* ~! w
[root@controller2 _data]# yum install -y gdb
8 C' v# q- u: M  ?) z
) S8 i  Z" \4 Z7 \. H( V

admin

在/etc/profile文件中有这样一行

ulimit -S -c 0 > /dev/null 2>&1
! b, p% s: e. k: b8 b
[root@controller2 _data]# source /etc/profile
9 X5 A! Y4 \- l  y4 |8 s
' s: w2 P- ?) `1 B: B' Q% [在/etc/profile文件中有这样一行

  e( M" y  z+ B  mulimit -c unlimited
, e) z; T) }7 S* l( D" D  _#ulimit -S -c 0 > /dev/null 2>&1

[root@controller2 _data]# source /etc/profile

/ n* S9 ]9 }( h[root@controller2 _data]# ulimit -c
  e% F8 I  y1 u7 X( Eunlimited

admin

[root@controller2 _data]# gdb test core.226
, r, U8 p) O) b) IGNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-120.el7
Copyright (C) 2013 Free Software Foundation, Inc.
. k8 [8 U( _& E* K) U3 I# lLicense 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.
2 M2 w' E7 l. D( G* K8 x3 B. qThis GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/test...Reading symbols from /usr/bin/test...(no debugging symbols found)...done.
8 ^& ]) X# \+ I4 y. X(no debugging symbols found)...done.
7 p+ ]5 w4 n3 K+ l$ B$ @; i
# N+ y% z! x# j7 [( Jwarning: core file may not match specified executable file.
; d. Y' Z: h- P* Y) t+ n[New LWP 226]
[New LWP 16975]
- C( a7 q# O/ N6 o6 J+ S[New LWP 630]
[New LWP 640]
# t# `/ Y0 e5 B) @/ B[New LWP 622]
& O. @% d. {: u& k[New LWP 231]
2 |/ L* D( z4 p0 x& Z- i[New LWP 624]
[New LWP 641]
[New LWP 628]
[New LWP 17062]
6 Q; i3 s( U2 x* s" C5 @6 o2 q[New LWP 15193]
[New LWP 16937]
[New LWP 634]
% B" g/ o" W# M& C. ~4 s4 x+ n6 C6 [2 ~[New LWP 15630]
6 f5 s6 _( K: m2 C, W[New LWP 15095]
6 V! B' a+ x& u$ |[New LWP 14760]
[New LWP 15194]
[New LWP 12240]
[New LWP 15592]
: s1 i+ R: s! _# O% {[New LWP 15788]
' X5 Z5 v8 a& F" A8 W! N: L[New LWP 16208]
/ w5 S: X7 {; N; `; u& F6 u5 R: [[New LWP 12674]
[New LWP 16334]
[New LWP 12886]
[New LWP 14746]
[New LWP 13495]
0 z! b5 d% D$ X! t* J  n& i[New LWP 645]
[New LWP 643]
[New LWP 229]
& k# B: o% f: c[New LWP 619]
6 B4 F8 \, y9 C% j- W[New LWP 14269]
1 a+ r  }$ O* e0 V' E9 L: j[New LWP 14266]
+ v6 b8 ^7 u* o* Y& ?8 [+ G[New LWP 14245]
[New LWP 14201]
7 e& m+ |: i, g# V[New LWP 13824]
/ S( I3 `: c* c[New LWP 13834]
' g3 j+ o: G. |. t# ^[New LWP 14093]
[New LWP 13492]
7 Z' T. {, t( I9 [[New LWP 12825]
[New LWP 11905]
[New LWP 11802]
[New LWP 11783]
$ f# A0 o5 }4 p, Y8 a% s- F. F[New LWP 639]
[New LWP 232]
! F) @  R8 C, L& j* q[New LWP 631]
[New LWP 626]
# H" P) S# `* I( O4 h) |[New LWP 11692]
[New LWP 11873]
[New LWP 15303]
[New LWP 15496]
[New LWP 230]
' J6 N) l+ _) k8 x5 A* z[New LWP 646]
[New LWP 17008]
[New LWP 618]
! I& N* B8 m/ g# h[New LWP 623]
[New LWP 625]
[New LWP 627]
: U# R! A! J; T+ Y+ {8 M: L[New LWP 633]
[New LWP 637]
. Z% d. v/ _; K5 M: J/ F1 q$ p8 P[New LWP 638]
, ?- q; N- z9 F8 l+ H[New LWP 16508]
+ _8 D/ A6 z3 E5 U. m, e[New LWP 228]
* C7 o" b* Z1 b6 _$ ]6 J: n[New LWP 632]
- G8 t4 |( X$ D" B7 _[New LWP 16618]
3 E5 R  A2 m$ `6 h" |$ Z) A[New LWP 14913]
, R3 l+ |, k- Q9 x[New LWP 15688]
[New LWP 13122]
) I* E1 k" N" b3 Q[New LWP 16516]
[New LWP 13185]
[New LWP 16963]
' Y0 y# Q: u- T8 Z[New LWP 14400]
1 x" [- {% V2 u) x& f2 x[New LWP 15685]
[New LWP 14698]
[New LWP 12576]
[New LWP 13929]
[New LWP 11930]
[New LWP 12281]
. M- E; D* j3 z7 y[New LWP 12630]
[New LWP 12148]
[New LWP 12259]
$ O* n! D# j: j' l# N4 M" Q( m, \[New LWP 12965]
7 J5 d1 i( V6 ^1 _& b: _[New LWP 13502]
[New LWP 13624]
& ?3 d6 u- ^8 {% b; W2 l[New LWP 13666]
8 |  J2 u! d, ^' a[New LWP 642]
$ `) _+ J% S' ^$ O1 h: f2 u( W[New LWP 644]
) v3 C' V8 i5 I2 z[New LWP 11863]
[New LWP 12152]
6 a7 |+ b3 F* a7 g6 C. I8 g[New LWP 11901]
[New LWP 12090]
[New LWP 15150]
[New LWP 15011]
[New LWP 14226]
[New LWP 635]
0 t! J7 ]5 f/ F% w2 z[New LWP 15060]
+ \0 Y6 B. Y! z9 Y) x# S[New LWP 636]
[New LWP 227]
' ]% G, {  T8 Z) K[New LWP 621]
[New LWP 620]
[New LWP 13689]
/ S; k* c% d# w7 Q6 D6 LCore was generated by `/usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql/ --plugin-dir=/usr/'.
- Z8 Y; L* r! B: @' m9 aProgram terminated with signal 11, Segmentation fault.
4 K+ D- A0 X3 l#0  0x00007f26fd80e38d in ?? ()
* D$ G/ c" h2 r9 P: I' \Missing separate debuginfos, use: debuginfo-install coreutils-8.22-24.el7.x86_64
+ N: ?$ X+ P3 `3 S! V

' O  {# `( A! f/ L  p(gdb) bt
#0  0x00007f26fd80e38d in ?? ()
#1  0x0000000000000000 in ?? ()
(gdb) where
4 A- O8 \- k( z8 b# s6 W2 q#0  0x00007f26fd80e38d in ?? ()
4 `4 K5 u3 }* Y$ t9 C#1  0x0000000000000000 in ?? ()
(gdb)