gdb can not debug “hello world” in mac os x

gdb can not debug “hello world” in mac os x

[hefeweizen]

Hi, I have the following smal C++ program

#include <stdio.h>
#include <stdlib.h>

int main(void) {
    puts("!!!Hello World!!!");
    return EXIT_SUCCESS;
}

I compile in Mac OS X Leopard last release using:

g++ -g hello.cpp -o hello.exe

being g++:

host:bin macbook$ g++ --ver
Using built-in specs.
Target: i686-apple-darwin9
Configured with: /var/tmp/gcc/gcc-5493~1/src/configure --disable-checking
-enable-werror --prefix=/usr --mandir=/share/man
--enable-languages=c,objc,c++,obj-c++
--program-transform-name=/^[cg][^.-]*$/s/$/-4.0/
--with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/usr/lib
--build=i686-apple-darwin9 --with-arch=apple --with-tune=generic
--host=i686-apple-darwin9 --target=i686-apple-darwin9
Thread model: posix
gcc version 4.0.1 (Apple Inc. build 5493)

then I try to debug this program using fsf-gdb 7.1:

fsf-gdb hello.exe

put a breakpoint in main:

(gdb) b main
Breakpoint 1 at 0x1f8f: file hello.cpp, line 5.

run the program:

(gdb) r
Starting program:
/Users/horacio/work/software/gdb/gdb-7.2-inst/bin/hello.exe 

Breakpoint 1, main () at hello.cpp:5
5       puts("!!!Hello World!!!");

and try to step, and this happens:

(gdb) n
0x00003045 in ?? ()

This is the output if I do the same under Ubuntu Linux:

(gdb) n
!!!Hello World!!!
6       return EXIT_SUCCESS;

where gcc=7.1 and gcc 4.3.4

What is the problem ???? I honestly do not understand why this does not work
in mac os x.

Maybe the problem is the gdb version used in mac or the gcc version in mac.
Which other alternatives exist for gdb in mac?

Thanks in advance

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Re: gdb can not debug “hello world” in mac os x

[Tristan Gingold]

On Mar 8, 2011, at 4:54 PM, hefeweizen wrote:

> 
> Hi, I have the following smal C++ program

[...]

> What is the problem ???? I honestly do not understand why this does not work
> in mac os x.

This could be investigated.  I never tried to debug C++ applications with fsf gdb.
Also, you could try with a more recent version of gdb (7.2)

> 
> Maybe the problem is the gdb version used in mac or the gcc version in mac.
> Which other alternatives exist for gdb in mac?

You can use the gdb provided by Apple.

Tristan.

Re: gdb can not debug “hello world” in mac os x

[hefeweizen]

the main problem is the following;

gdb provided by apple does not produce this problem. But I want to use
Eclipse CDT Helios in Mac. When Eclipse calls Apple gdb (6.3) there is a lot
of problems for debugging. With gdb 7.1 or 7.2 I only get this mentioned
problem.



Tristan Gingold-2 wrote:
> 
> 
> On Mar 8, 2011, at 4:54 PM, hefeweizen wrote:
> 
>> 
>> Hi, I have the following smal C++ program
> 
> [...]
> 
>> What is the problem ???? I honestly do not understand why this does not
>> work
>> in mac os x.
> 
> This could be investigated.  I never tried to debug C++ applications with
> fsf gdb.
> Also, you could try with a more recent version of gdb (7.2)
> 
>> 
>> Maybe the problem is the gdb version used in mac or the gcc version in
>> mac.
>> Which other alternatives exist for gdb in mac?
> 
> You can use the gdb provided by Apple.
> 
> Tristan.
> 
> 
> 

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Re: gdb can not debug “hello world” in mac os x

[André Pönitz]

On Tuesday 08 March 2011 17:12:13 ext hefeweizen wrote:
> 
> the main problem is the following;
> 
> gdb provided by apple does not produce this problem. But I want to use
> Eclipse CDT Helios in Mac. When Eclipse calls Apple gdb (6.3) there is a lot
> of problems for debugging. With gdb 7.1 or 7.2 I only get this mentioned
> problem.

There is also  http://sourceware.org/bugzilla/show_bug.cgi?id=11488

I would be glad if I could use a Python enabled gdb on Mac for Qt Creator, 
too, but right now the only option is indeed Apple's 6.3, and that probably 
will never get Python scripting ;-|

Andre'

Re: gdb can not debug “hello world” in mac os x

[Peter Watkins]

Hi Horacio,


On 03/08/2011 07:54 AM, horacio.sanchez@kit.edu wrote:
>
> Hi, I have the following smal C++ program
>
> #include<stdio.h>
> #include<stdlib.h>
>
> int main(void) {
>      puts("!!!Hello World!!!");
>      return EXIT_SUCCESS;
> }
>
> I compile in Mac OS X Leopard last release using:
>
> g++ -g hello.cpp -o hello.exe
>
> being g++:
>
> host:bin macbook$ g++ --ver
> Using built-in specs.
> Target: i686-apple-darwin9
> Configured with: /var/tmp/gcc/gcc-5493~1/src/configure --disable-checking
> -enable-werror --prefix=/usr --mandir=/share/man
> --enable-languages=c,objc,c++,obj-c++
> --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/
> --with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/usr/lib
> --build=i686-apple-darwin9 --with-arch=apple --with-tune=generic
> --host=i686-apple-darwin9 --target=i686-apple-darwin9
> Thread model: posix
> gcc version 4.0.1 (Apple Inc. build 5493)
Did you get your GCC version from the Apple Developer Tools?


> then I try to debug this program using fsf-gdb 7.1:
>
> fsf-gdb hello.exe
What happens when you use Apple's version of GDB that comes with the 
Developer Tools?

-Peter

Re: gdb can not debug “hello world” in mac os x

[hefeweizen]

Apple Leopard's gdb does not produce this error. But I want to use Eclipse
CDT, and it can not work with Apple's gdb, that is why I am trying to use a
non-Apple gdb version. 


Peter Watkins-6 wrote:
> 
> Hi Horacio,
> 
> 
> On 03/08/2011 07:54 AM, horacio.sanchez@kit.edu wrote:
>>
>> Hi, I have the following smal C++ program
>>
>> #include<stdio.h>
>> #include<stdlib.h>
>>
>> int main(void) {
>>      puts("!!!Hello World!!!");
>>      return EXIT_SUCCESS;
>> }
>>
>> I compile in Mac OS X Leopard last release using:
>>
>> g++ -g hello.cpp -o hello.exe
>>
>> being g++:
>>
>> host:bin macbook$ g++ --ver
>> Using built-in specs.
>> Target: i686-apple-darwin9
>> Configured with: /var/tmp/gcc/gcc-5493~1/src/configure --disable-checking
>> -enable-werror --prefix=/usr --mandir=/share/man
>> --enable-languages=c,objc,c++,obj-c++
>> --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/
>> --with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/usr/lib
>> --build=i686-apple-darwin9 --with-arch=apple --with-tune=generic
>> --host=i686-apple-darwin9 --target=i686-apple-darwin9
>> Thread model: posix
>> gcc version 4.0.1 (Apple Inc. build 5493)
> Did you get your GCC version from the Apple Developer Tools?
> 
> 
>> then I try to debug this program using fsf-gdb 7.1:
>>
>> fsf-gdb hello.exe
> What happens when you use Apple's version of GDB that comes with the 
> Developer Tools?
> 
> -Peter
> 
> 

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Re: gdb can not debug “hello world” in mac os x

[Paul Pluzhnikov]

On Tue, Mar 8, 2011 at 7:54 AM, hefeweizen <horacio.sanchez@kit.edu> wrote:

> (gdb) b main
> Breakpoint 1 at 0x1f8f: file hello.cpp, line 5.
>
> run the program:
>
> (gdb) r
> Starting program:
> /Users/horacio/work/software/gdb/gdb-7.2-inst/bin/hello.exe
>
> Breakpoint 1, main () at hello.cpp:5
> 5       puts("!!!Hello World!!!");
>
> and try to step, and this happens:
>
> (gdb) n
> 0x00003045 in ?? ()

FWIW, I did not reproduce this with current CVS build of GDB:

gdb/gdb ./a.out
GNU gdb (GDB) 7.3.50.20110508-cvs
Copyright (C) 2011 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-apple-darwin10.7.0".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /Users/ppluzhnikov/gdb-cvs/build/a.out...Reading
symbols from /Users/ppluzhnikov/gdb-cvs/build/a.out.dSYM/Contents/Resources/DWARF/a.out...done.
done.
(gdb) b main
Breakpoint 1 at 0x100000ef8: file t.cc, line 5.
(gdb) r
Starting program: /Users/ppluzhnikov/gdb-cvs/build/a.out

Breakpoint 1, main () at t.cc:5
5	   puts("!!!Hello World!!!");
(gdb) n
!!!Hello World!!!
6	   return EXIT_SUCCESS;
(gdb) n
7	}
(gdb) n
0x0000000100000eec in start ()
(gdb) c
Continuing.
[Inferior 1 (process 41135) exited normally]
(gdb) q


-- 
Paul Pluzhnikov