php4-beta | 199912

Re: [PHP4BETA] TSRM problems... UMBRs everywhere:-(( From: zeev <email protected>
Date: 12/23/99

On Thu, 23 Dec 1999, Thies C. Arntzen wrote:

> On Thu, 23 Dec 1999 zeev <email protected> wrote:
>
> > On Thu, 23 Dec 1999, Thies C. Arntzen wrote:
> >
> > > remember - global variables are usually zeroed when the program loads:
> > >
> > > #include <stdio.h>
> > > int not_reported;
> > > main()
> > > {
> > > int reported;
> > > printf("%d\n",not_reported);
> > > printf("%d\n",reported);
> > > }
> > >
> > > purify will not report not_reported 'cause the crt *will* initialize it to
> > > zero!
> >
> > I think it's a purify bug then.
>
> sorry, you're wrong:
>
> bss section
> -----------
>
> This section contains zeroed bytes when your program begins running. It is
> used to hold unitialized variables or common storage. The length of each
> partial program's bss section is important, but because it starts out
> containing zeroed bytes there is no need to store explicit zero bytes in
> the object file. The bss section was invented to eliminate those explicit
> zeros from object files.

This is specific to Solaris, I think. AFAIK, the C standard doesn't say
that globals are zerod if not explicitly initialized (the C++ standard
says that about static member variables, but that's about it).

> s/c/s/g ??

Huh?

Zeev 

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