linux-c/c++调试利器gdb、ddd小试
原文链接： http://deepfuture.iteye.com/blog/749148
博客分类：
一、gdb，在shell窗口调试
main.c内容：
main.c
#include <stdio.h>
int main()
{
int y=0;
for (int i=0;i<10;i++){
y+=i;
}
return 0;
}
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编译：
[email protected]:~/test$ gcc -ggdb -std=c99 -o main main.c
启动gdb
1、gdb 执行文件名
[email protected]:~/test$ gdb main
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License 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.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/deepfuture/test/main...done.
２、list为列出源代码
(gdb) list
1
2 #include <stdio.h>
3 int main()
4 {
5 int y=0;
6 for (int i=0;i<10;i++){
7 y+=i;
8 }
9 return 0;
10 }
３、运行
(gdb) run
Starting program: /home/deepfuture/test/main
Program exited normally.
4、退出gdb
(gdb) quit
5、启动gdb后，再设置要加载的文件
(gdb) file main
Reading symbols from /home/deepfuture/test/main...done.
6、设置断点,，使用break行号
(gdb) list
warning: Source file is more recent than executable.
1
2 #include <stdio.h>
3 int main()
4 {
5 int y=0;
6 for (int i=0;i<10;i++){
7 y+=i;
8 }
9 return 0;
10 }
(gdb) break 7
Breakpoint 1 at 0x80483ca: file main.c, line 7.
７、运行,run
(gdb) run
Starting program: /home/deepfuture/test/main
Breakpoint 1, main () at main.c:7
7 y+=i;
8、离开这个断点，继续运行
(gdb) c
Continuing.
9、监视变量
(gdb) watch y
Hardware watchpoint 2: y
１０、检查变量变化
(gdb) c
Continuing.
Hardware watchpoint 2: y
Old value = 1
New value = 3
main () at main.c:6
6 for (int i=0;i<10;i++){
(gdb) c
Continuing.
Breakpoint 1, main () at main.c:7
7 y+=i;
(gdb) c
Continuing.
Hardware watchpoint 2: y
Old value = 3
New value = 6
main () at main.c:6
6 for (int i=0;i<10;i++){
二、ddd，使用
可以在选择行或某变量后，watch,break等按钮，很方便
右中部的面板是一些流程调试
图形方式调试