Dear Héctor Orón Martínez
My problem is that the breakpoint set at the first time do noting if I compile
the code again.
The test code is
//test.c
1 #include <stdlib.h>
2 #include <stdio.h>
3
4 int main()
5 {
6 int a=1, b=2, c=3;
7 int s;
8 s=a+b;
9 s+=c;
10 printf("%d+%d+%d = %d\n", a, b, c, s);
11
12 return 0;
13 }
I compile the code with
$ gcc -Wall -g test.c -o test
Then I run gdb
$ gdb test
I set a breakpoint at line 8
(gdb) :break 8
And run the program in gdb
(gdb) :run
Then I compile the same code at the second time with the same command
$ gcc -Wall -g test.c -o test
And run the probram in gdb again. The breakpoint do nothing. If I check the
status of the breakpoint with
(gdb) :info breakpoints
the output is
Num Type Disp Enb Address What
1 breakpoint keep n 0x00005555555546cd in main at test.c:8
The output means the breakpoint is NOT enabled. I think the status of the
breakpoint should NOT be changed.
Best Regards
Lu Wang
________________________________
From: Héctor Orón Martínez <hector.o...@gmail.com>
Sent: Monday, May 29, 2017 11:04 PM
To: Lu Wang; 863...@bugs.debian.org
Subject: Re: Bug#863620: gdb: breakpoints disappear after recompiling
Hello,
2017-05-29 13:02 GMT+02:00 Lu Wang <wanglus...@hotmail.com>:
> I have set some breakpoints. If I recompile the code for debugging.
> Then I execute the program using the command
> run and the breakpoints disappear. This ought to work, but doesn't
> restore my breakpoints.
>
> the output is
>
> `/home/tw/Documents/test1/xxx' has changed; re-reading symbols.
> Error in re-setting breakpoint 1: Cannot access memory at address
> 0x5555555546f0
> Starting program: /home/tw/Documents/test1/xxx
> [Switching to thread 1 (process 11336)](running)
> [Inferior 1 (process 11336) exited normally]
Not sure if I understand correctly, but break points work for me...
/tmp/hello-2.10$ gdb hello
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
Copyright (C) 2016 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 "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from hello...done.
(gdb) b main
Breakpoint 1 at 0x15f0: file src/hello.c, line 41.
(gdb) run
Starting program: /tmp/hello-2.10/hello
Breakpoint 1, main (argc=1, argv=0x7fffffffe0a8) at src/hello.c:41
41 {
(gdb)
However, what do you mean with you recompile the code for debugging?
Can you show a reproducible testcase?
Regards
--
Héctor Orón -.. . -... .. .- -. -.. . ...- . .-.. --- .--. . .-.
