用GDB除錯程式（一）
阿新 • • 發佈：2019-02-17
hchen/test> gdb tst <---------- 啟動GDB
GNU gdb 5.1.1
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-suse-linux"...
(gdb) l <-------------------- l命令相當於list，從第一行開始例出原碼。
1 #include <stdio.h>
2
3 int func(int n)
4 {
5 int sum=0,i;
6 for(i=0; i<n; i++)
7 {
8 sum+=i;
9 }
10 return sum;
(gdb) <-------------------- 直接回車表示，重複上一次命令
11 }
12
13
14 main()
15 {
16 int i;
17 long result = 0;
18 for(i=1; i<=100; i++)
19 {
20 result += i;
(gdb) break 16 <-------------------- 設定斷點，在源程式第16行處。
Breakpoint 1 at 0x8048496: file tst.c, line 16.
(gdb) break func <-------------------- 設定斷點，在函式func()入口處。
Breakpoint 2 at 0x8048456: file tst.c, line 5.
(gdb) info break <-------------------- 檢視斷點資訊。
Num Type Disp Enb Address What
1 breakpoint keep y 0x08048496 in main at tst.c:16
2 breakpoint keep y 0x08048456 in func at tst.c:5
(gdb) r <--------------------- 執行程式，run命令簡寫
Starting program: /home/hchen/test/tst
GNU gdb 5.1.1
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-suse-linux"...
(gdb) l <-------------------- l命令相當於list，從第一行開始例出原碼。
1 #include <stdio.h>
2
3 int func(int n)
4 {
5 int sum=0,i;
6 for(i=0; i<n; i++)
7 {
8 sum+=i;
9 }
10 return sum;
(gdb) <-------------------- 直接回車表示，重複上一次命令
11 }
12
13
14 main()
15 {
16 int i;
17 long result = 0;
18 for(i=1; i<=100; i++)
19 {
20 result += i;
(gdb) break 16 <-------------------- 設定斷點，在源程式第16行處。
Breakpoint 1 at 0x8048496: file tst.c, line 16.
(gdb) break func <-------------------- 設定斷點，在函式func()入口處。
Breakpoint 2 at 0x8048456: file tst.c, line 5.
(gdb) info break <-------------------- 檢視斷點資訊。
Num Type Disp Enb Address What
1 breakpoint keep y 0x08048496 in main at tst.c:16
2 breakpoint keep y 0x08048456 in func at tst.c:5
(gdb) r <--------------------- 執行程式，run命令簡寫
Starting program: /home/hchen/test/tst