linux-c/c++ Debugging tool GDB, DDD small test

linux-c/c++ Debugging tool GDB, DDD small test

Original link: http://deepfuture.iteye.com/blog/749148

Blog Category:

• C++/c/lisp

Cc++c#linuxubuntu

One, GDB, debugging in the Shell window

MAIN.C content:

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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Compile:

[Email protected]:~/test$ gcc-ggdb-std=c99-o main MAIN.C

Start GDB

1. gdb Execution file name

[Email protected]:~/test$ gdb Main

GNU gdb (GDB) 7.1-ubuntu

Copyright (C) Free Software Foundation, Inc.

License gplv3+: GNU GPL version 3 or later

This was free software:you was 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 is configured as "I486-linux-gnu".

For bugs reporting instructions, please see:

Reading symbols From/home/deepfuture/test/main...done.

2, list for listing source code

(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;

Ten }

3, run (GDB) runstarting program:/home/deepfuture/test/main program exited normally.4, Exit gdb (GDB) quit5, start gdb, and then set the file to be loaded (gdb) file mainreading symbols From/home/deepfuture/test/main...done. 6. Set breakpoints, use break line number (GDB) Listwarning:source file is more recent than executable.12#include <stdio.h>3int main ()4 {5int y=0;6for (int i=0;i<10;i++) {7y+=i;8 }9return 0;10 }(GDB) Break 7Breakpoint 1 at 0x80483ca:file main.c, line 7. 7, running, run (GDB) runstarting Program:/home/deepfuture/test/main Breakpoint 1, Main () at main.c:77y+=i;8, leave this breakpoint, continue to run (GDB) ccontinuing.9, watch variable (gdb) watch Yhardware watchpoint 2:y10, check variable (gdb) ccontinuing.hardware Watchpoint 2:yOld value = 1New value = 3Main () at main.c:66for (int i=0;i<10;i++) {(GDB) ccontinuing. Breakpoint 1, Main () at main.c:77y+=i;(gdb) Ccontinuing.hardware watchpoint 2:yOld value = 3New value = 6Main () at main.c:66for (int i=0;i<10;i++) {Second, DDD, can be used in the selection of a row or a variable, watch,break and other buttons, very convenient right middle of the panel is some process debugging

Graphical mode debugging

linux-c/c++ Debugging tool GDB, DDD small test