Garrett D'Amore wrote:
>One potential concern. I know of certain bits of code where strings
>like "$Id: some text$" are "edited" in place to form version numbers
>from $Id$ and similar strings.
>
>The places I can think of actually occur in kernel code!
>
>
>
Standard violating code? I'm shocked!
How does this work with the gcc build, are compile options used so
string literals do not go in read only pages?
>I suspect that making this the default _might_ break a number of
>things. It would be very, very helpful if we had compiler help to
>_detect_ incorrect attempts to write to constant strings. I'm not sure
>-xstrconst will give us the warnings to catch them before they become
>bugs in the field.
>
>
>
I'm not sure what lint level is used in the builds, but given
int main(void)
{
char* xx = "fhfhfhf";
xx[0] ='d';
return 0;
}
lint -Nlevel=2 x.c
modification of constant data
<unknown name> :: x.c(4)
Lint spots the error.
Ian
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