Article View: comp.std.c
Article #3353Re: Struct hack one last time (one last time)
From: Martin Weitzel
Date: Mon, 11 Jan 1993 10:28
Date: Mon, 11 Jan 1993 10:28
21 lines
1641 bytes
1641 bytes
In article <1993Jan8.184304.10965@taumet.com> steve@taumet.com (Steve Clamage) writes: [...] :The compiler is allowed to recognize calls to standard library functions. :It could fix up the returned struct after the call to malloc (or realloc :or calloc). It would also have to interpret the size in case an array :were being allocated: : extern size_t s; : struct w *p = malloc(s); : /* fixup s/sizeof(struct w) structs here */ : :You could subvert this via void* pointers, but that isn't the point. :Presumably this is an optional checkout mode, and such modes typically :impose constraints on programmers. If you play games to subvert type :checking, you are going to have problems. Wait, wait, I think this argument is not quite fair. I could proceed along the same path claiming a conforming program should not use setjmp/ longjmp because I may envision some implementation which provides an optional checkout mode for programs that avoid setjmp, etc, etc. -- Martin Weitzel, email: martin@mwtech.UUCP, voice: 49-(0)6151-6 56 83
Technical Details
Message-ID:
<1376@mwtech.UUCP>Path:
arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!spool.mu.edu!yale.edu!ira.uka.de!Germany.EU.net!mikros!mwtech!martinReferences:
<1992Dec31.153931.7495@hubcap.clemson.edu> <1993Jan1.173852.26630@taumet.com> <1993Jan7.145117.8220@jarvis.csri.toronto.edu> <1993Jan8.184304.10965@taumet.com>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!spool.mu.edu!yale.edu!ira.uka.de!Germany.EU.net!mikros!mwtech!martin From: martin@mwtech.UUCP (Martin Weitzel) Newsgroups: comp.std.c Subject: Re: Struct hack one last time (one last time) Message-ID: <1376@mwtech.UUCP> Date: 11 Jan 93 10:28:42 GMT References: <1992Dec31.153931.7495@hubcap.clemson.edu> <1993Jan1.173852.26630@taumet.com> <1993Jan7.145117.8220@jarvis.csri.toronto.edu> <1993Jan8.184304.10965@taumet.com> Reply-To: martin@mwtech.UUCP (Martin Weitzel) Organization: MIKROS Systemware, Darmstadt/W-Germany Lines: 21