gdb调试时命令行参数如何输入?比如main(int argc,char **argv)中,我要把一个filename作为argv[1]传入给gdb调试

8 个解决方案

#1

gdb>r exefile arg1 arg2 ...

#2

set args filename

#3

楼上的,我照你说的做了,但还是提示文件不能打开.
我程序运行格式是:filerwt in.txt
其中文件的当前目录是:/home/zgh/test
操作流程如下,我把我操作的步骤过程给你paste下来了,请指正

[zgh@ps test]$ pwd
/home/zgh/test
[zgh@ps test]$ ls
FileRWTest.c  filerwt*  in.txt  test*  test.c
[zgh@ps test]$ gdb -q filerwt
(gdb) set args in.txt
(gdb) b main
Breakpoint 1 at 0x8048556: file FileRWTest.c, line 9.
(gdb) r
Starting program: /home/zgh/test/filerwt in.txt

Breakpoint 1, main (argc=2, argv=0xbffffd04) at FileRWTest.c:9
9               if( (fp=fopen(argv[1],"r"))==NULL ){
(gdb) s
_IO_new_fopen (filename=0xbffffe13 "in.txt", mode=0x8048690 "r")
    at iofopen.c:44
44      iofopen.c: No such file or directory.
(gdb) n
47      in iofopen.c
(gdb)

#4

回: happen23(微笑刺客):

你说的:gdb>r exefile arg1 arg2 ...好象不行的.请看:

[zgh@ps test]$ pwd
/home/zgh/test
[zgh@ps test]$ ls
FileRWTest.c filerwt* in.txt test* test.c
[zgh@ps test]$ gdb -silent
(gdb) r filerwt in.txt
Starting program: filerwt in.txt
No executable file specified.
Use the "file" or "exec-file" command.
(gdb)

我哪儿操作出错了呢?

#5

你“set args in.txt”的操作没有错误啊
程序不是正在正常运行嘛。
在“if( (fp=fopen(argv[1],"r"))==NULL )”一句step，就进入iofopen.c了
用next看是进入if体还是跳出if体。

#6

(gdb) r
Starting program: /home/zgh/test/filerwt in.txt

Breakpoint 1, main (argc=2, argv=0xbffffd24) at FileRWTest.c:9
9               if( (fp=fopen(argv[1],"r"))==NULL ){
(gdb) s
_IO_new_fopen (filename=0xbffffe35 "in.txt", mode=0x8048690 "r")
    at iofopen.c:44
44      iofopen.c: No such file or directory.    //此处为何出现"没这样的文件或目录"？？
(gdb) n
47      in iofopen.c
(gdb) n
49      in iofopen.c
(gdb) n
50      in iofopen.c
(gdb) n
51      in iofopen.c
(gdb) n  //执行next老是 in  iofopen.c
不过，以后好象是在向下运行的
谢谢！！

#7

fopen()的源代码是在iofopen.c中的
在if时，就不用step了，直接next，系统函数的源代码没什么好跟的 :-)

#8

set args ...

#1