• kk (44/44) Dec 07 2017 Hey so I recently got back into D a bit, but I'm having a bit of
• Rainer Schuetze (4/63) Dec 09 2017 I'm not a GDC/gdb user, but with "b main" you are breaking into the
• kk (3/6) Dec 09 2017 Oh that's totally it. Thank you! :)

kk <klynesys gmail.com> writes:

Hey so I recently got back into D a bit, but I'm having a bit of 
trouble with debugging.

So for this minimal test file:

void main()
{
     int x = 5;
     int y = x * 20;


     float b = 6.7432143;

     b *= 2;

}

Compiled with gdc (Ubuntu 7.2.0-8ubuntu3) 7.2.0
$ gdc -g test.d -otest

I get this output in gdb
--------------------------------------------------------------------------------
(gdb) b main
Breakpoint 1 at 0x104f9: file 
/usr/lib/gcc/x86_64-linux-gnu/7/include/d/__entrypoint.di, line 
44.
(gdb) r
Starting program: /home/kyoji/ProgrammingTests/dlang/test
[Thread debugging using libthread_db enabled]
Using host libthread_db library 
"/lib/x86_64-linux-gnu/libthread_db.so.1".

Breakpoint 1, main (argc=1, argv=0x7fffffffdd78) at 
/usr/lib/gcc/x86_64-linux-gnu/7/include/d/__entrypoint.di:44
44          return _d_run_main(argc, argv, &_Dmain);
(gdb) n
45      }
(gdb)
__libc_start_main (main=0x5555555644ea <main>, argc=1, 
argv=0x7fffffffdd78, init=<optimized out>, fini=<optimized out>, 
rtld_fini=<optimized out>,
     stack_end=0x7fffffffdd68) at ../csu/libc-start.c:342
342     ../csu/libc-start.c: No such file or directory.
(gdb)
[Inferior 1 (process 11211) exited normally]
----------------------------------------------------------------------------------


Sometimes if I reformatted the text, it would print a random 
line, such as 'b *= 2'
but it was more less random.

I also did try forcing different dwarf versions, but it was the 
exact same result.


If I need to post anymore info please let me know.
Thanks!

Rainer Schuetze <r.sagitario gmx.de> writes:

On 07.12.2017 20:08, kk wrote:
 Hey so I recently got back into D a bit, but I'm having a bit of trouble 
 with debugging.
 
 So for this minimal test file:
 
 void main()
 {
      int x = 5;
      int y = x * 20;
 
 
      float b = 6.7432143;
 
      b *= 2;
 
 }
 
 Compiled with gdc (Ubuntu 7.2.0-8ubuntu3) 7.2.0
 $ gdc -g test.d -otest
 
 I get this output in gdb
 ------------------------------------------------------------
------------------- 
 
 (gdb) b main
 Breakpoint 1 at 0x104f9: file 
 /usr/lib/gcc/x86_64-linux-gnu/7/include/d/__entrypoint.di, line 44.
 (gdb) r
 Starting program: /home/kyoji/ProgrammingTests/dlang/test
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 
 Breakpoint 1, main (argc=1, argv=0x7fffffffdd78) at 
 /usr/lib/gcc/x86_64-linux-gnu/7/include/d/__entrypoint.di:44
 44          return _d_run_main(argc, argv, &_Dmain);
 (gdb) n
 45      }
 (gdb)
 __libc_start_main (main=0x5555555644ea <main>, argc=1, 
 argv=0x7fffffffdd78, init=<optimized out>, fini=<optimized out>, 
 rtld_fini=<optimized out>,
      stack_end=0x7fffffffdd68) at ../csu/libc-start.c:342
 342     ../csu/libc-start.c: No such file or directory.
 (gdb)
 [Inferior 1 (process 11211) exited normally]
 --------------------------------------------------------------
------------------- 
 
 
 
 Sometimes if I reformatted the text, it would print a random line, such 
 as 'b *= 2'
 but it was more less random.
 
 I also did try forcing different dwarf versions, but it was the exact 
 same result.
 
 
 If I need to post anymore info please let me know.
 Thanks!
 

I'm not a GDC/gdb user, but with "b main" you are breaking into the 
automatically generated C main function, not D's main. Try "b Dmain" or 
"b _Dmain" or use the source line.

kk <klynesys gmail.com> writes:

On Saturday, 9 December 2017 at 11:22:52 UTC, Rainer Schuetze 
wrote:
 I'm not a GDC/gdb user, but with "b main" you are breaking into 
 the automatically generated C main function, not D's main. Try 
 "b Dmain" or "b _Dmain" or use the source line.

Oh that's totally it. Thank you! :)