Problem with manual watchpoints

Jan Kratochvil
Thu Dec 24 21:52:00 GMT 2009

On Thu, 24 Dec 2009 22:41:37 +0100, Aravinda wrote:
> Yes, thats why I have a watchpoint added at &a[20]. So on accessing
> the first element out of the allocated array, I want the program to
> receive a SIGTRAP.

Ah, OK.

> Infact it gets this signal when the getc(stdin) is included, is it
> something to do with the program should be in single step mode to get


> or is the loop way too simple that it executes in no time before the SIGTRAP
> is even raised ?

There may be some compiler optimization in effect such as if you have not used
"volatile" keyword for the "a" array. You should rather check the code using
"objdump -dS" or GDB "disass/m" how it got compiled.

Still (with default -O0) I do not know the answer.


More information about the Gdb mailing list