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flag panic() and terminate() as "no return"

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Mark panic() as never returning so that code analysis might be able
to do a smarter job.  It required splitting done() into two routines
since the first part really can return (but not if PANICKED was the
reason it got called).  done() is now much shorter and ends with a
call to new really_done(), and panic() skips done()'s might-return
part by calling really_done() directly.

Noticed in passing:  the "report error to <list of SYSCF WIZARDS>"
code calls a routine which uses alloc(), which won't work very well
if the reason for panic was because malloc() ran out of memory.
This commit is contained in:
PatR
2015-11-22 08:33:42 -08:00
parent f22c9c000a
commit b30fce4f88
4 changed files with 63 additions and 47 deletions
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7
util/panic.c
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@@ -1,10 +1,10 @@
/* NetHack 3.6 panic.c $NHDT-Date: 1432512785 2015/05/25 00:13:05 $ $NHDT-Branch: master $:$NHDT-Revision: 1.9 $ */
/* NetHack 3.6 panic.c $NHDT-Date: 1448210012 2015/11/22 16:33:32 $ $NHDT-Branch: master $:$NHDT-Revision: 1.10 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed. See license for details. */
/*
* This code was adapted from the code in end.c to run in a standalone
* mode for the makedefs / drg code.
* This code was adapted from the code in end.c to run in a standalone
* mode for the makedefs / drg code.
*/
#define NEED_VARARGS
@@ -43,7 +43,6 @@ VA_DECL(char *, str)
#endif
VA_END();
exit(EXIT_FAILURE); /* redundant */
return;
}
#ifdef ALLOCA_HACK