我希望能够在 GDB 中设置一个断点，并让它运行到该点 - 并在此过程中打印出它“单步执行”的行。
这是一个基于这个简单文件的示例main和一个函数，每个函数有两个断点：
$ cat > test.c <<EOF
#include "stdio.h"
int count=0;
void doFunction(void) {
// two steps forward
count += 2;
// one step back
count--;
}
int main(void) {
// some pointless init commands;
count = 1;
count += 2;
count = 0;
//main loop
while(1) {
doFunction();
printf("%d\n", count);
}
}
EOF
$ gcc -g -Wall test.c -o test.exe
$ chmod +x test.exe
$ gdb -se test.exe
...
Reading symbols from /path/to/test.exe...done.
(gdb) b main
Breakpoint 1 at 0x80483ec: file test.c, line 14.
(gdb) b doFunction
Breakpoint 2 at 0x80483c7: file test.c, line 7.
要启动会话，我需要运行（r）程序，然后将在第一个断点处停止（main):
(gdb) r
Starting program: /path/to/test.exe
Breakpoint 1, main () at test.c:14
14 count = 1;
(gdb)
此时 - 例如，我可以点击继续（c）；该过程将运行，不输出任何内容，并在请求行处中断：
(gdb) c
Continuing.
Breakpoint 2, doFunction () at test.c:7
7 count += 2;
(gdb)
另一方面，我可以使用步骤（而不是继续）逐行进行操作s）或下一个（n）；例如：
14 count = 1;
(gdb) n
15 count += 2;
(gdb) s
16 count = 0;
(gdb) s
19 doFunction();
(gdb) s
Breakpoint 2, doFunction () at test.c:7
7 count += 2;
(gdb) s
9 count--;
(gdb) s
10 }
(gdb) s
main () at test.c:20
20 printf("%d\n", count);
(gdb) s
...
(gdb) s
_IO_vfprintf_internal (s=Cannot access memory at address 0xe5853361
) at vfprintf.c:210
210 vfprintf.c: No such file or directory.
in vfprintf.c
(gdb) s
245 in vfprintf.c
(gdb) s
210 in vfprintf.c
(gdb) n
245 in vfprintf.c
...
(gdb) n
2006 in vfprintf.c
(gdb) n
__printf (format=0x80484f0 "%d\n") at printf.c:39
39 printf.c: No such file or directory.
in printf.c
(gdb) n
main () at test.c:21
21 }
(gdb) n
19 doFunction();
(gdb) n
Breakpoint 2, doFunction () at test.c:7
7 count += 2;
(gdb)
Anyways, I am aware that I can keep Enter pressed, and the last entered command (step or next) will repeat (left a bit longer session in the second case, to show that 'next' remains on same level, 'step' steps inside the functions being called). However, as it can be seen, depending on whether step or next runs, it may take a while until a result is reached - and so, I don't want to sit for 10 minutes with my hand stuck on the Enter button :)
所以，我的问题是 - 我可以以某种方式指导gdb运行到“断点 2”而无需进一步的用户干预 - 同时打印出它所经过的行，就好像按下了步骤（或下一步）一样？
