原创
GDB 的几个用法(until, finish, tui)
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本文链接： 转载gdb
1. until
这个用于执行完循环。
在执行完循环体内的最后一条语句之后执行 until, 就会执行完循环体到后面的一个语句停下。
2. finish
执行完当前的函数。
3. tui
是一个命令行的界面，能同时把代码显示出来。
inf
4. 设置条件断点的方法：
4.1 break [location] if condition
-
(gdb) l
-
2 {
-
3
int i;
-
4
int k =
0;
-
5
for(i =
0; i <
10; i++)
-
6 {
-
7 k = i * i;
-
8 }
-
9
-
10
return
0;
-
11 }
-
(gdb)
break
7
if i ==
5
-
Breakpoint
4 at
0x80483ca: file testloop.c, line
7.
-
(gdb) r
-
The program being debugged has been started already.
-
Start it from the beginning? (
y
or n)
y
-
-
Starting program:
/home/charles
/code/testloop
-
-
Breakpoint
4, main () at testloop.c:
7
-
7 k = i * i;
-
(gdb) p i
-
$7 =
5
-
(gdb)
4.2 使用 condition N condition. N是一个 breakpoint number.
-
(gdb) l
-
1 int main(void)
-
2 {
-
3 int i;
-
4 int k =
0;
-
5
for(i =
0; i <
10; i++)
-
6 {
-
7 k = i * i;
-
8 }
-
9
-
10
return
0;
-
(gdb)
break
7
-
Breakpoint
1 at
0x80483ca: file testloop.
c, line
7.
-
(gdb) info breakpoints
-
Num
Type
Disp
Enb
Address
What
-
1 breakpoint keep y
0x080483ca
in main at testloop.
c:
7
-
(gdb) help condition
-
Specify breakpoint number
N to
break only
if
COND
is
true.
-
Usage
is `condition
N
COND',
where
N
is an integer and
COND
is an
-
expression to be evaluated whenever breakpoint
N
is reached.
-
(gdb) condition
1 i ==
4
-
(gdb) info breakpoints
-
Num
Type
Disp
Enb
Address
What
-
1 breakpoint keep y
0x080483ca
in main at testloop.
c:
7
-
stop only
if i ==
4
-
(gdb) r
-
Starting program: /home/charles/code/testloop
-
-
Breakpoint
1, main () at testloop.
c:
7
-
7 k = i * i;
-
(gdb) p i
-
$
1 =
4
5. 多线程下禁止线程切换：
set scheduler-locking on
文章最后发布于: 2014-07-16 23:08:13
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用惯了 AIX 下 dbx 调试应用程序， 里面的goto语句可以忽略很多代码直接转条到某行代码上，这样可以减少很多单元测试中的环境问题。 如 1 if(getuid() == XXX){ 2 … 论坛
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gdb是如何判定finish指令如何执行到”函数末尾”的?
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