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Re: exec


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;


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