Re: exec

[Russell Shaw <rjshaw@netspace.net.au>]

Daniel Jacobowitz wrote:
> On Sun, Jan 02, 2005 at 02:44:55PM +1100, Russell Shaw wrote:
> 
>>Hi,
>>When i step into:
>>
>>  (*func) (program, argv);
>>
>>gdb exits.
>>
>>func is execv, and program is "/usr/local/libexec/gcc/avr/3.4.3/cc1"
>>
>>How do i get into cc1 so i can set breakpoints there?
> 
> Run it by hand - gcc -v will show you the command line.  GDB has very
> limited support for debugging across exec, depending on your platform.

Hi,
Cc1 runs ok at the command line:

   /usr/local/libexec/gcc/avr/3.4.3/cc1 -quiet -v main.c -quiet -dumpbase main.c -dP -mmcu=atmega16 
-auxbase main -g -O0 -Wall -Wno-unused -version -o /tmp/cccVrfqY.s

When i try to run the same thing in gdb, it crashes:

   Program received signal SIGSEGV, Segmentation fault.
   0x080f3cd1 in init_emit () at ../../gcc-3.4.3/gcc/emit-rtl.c:5354
   /home/russell/SRC/gcc-3.4.3/gcc/emit-rtl.c:5354:138102:beg:0x80f3cd1
   (gdb)

It crashes in emit-rtl.c here:

   /* Indicate that the virtual registers and stack locations are
      all pointers.  */
   REG_POINTER (stack_pointer_rtx) = 1;