[PATCH] Outwit compiler dead code elimination in break.exp test (revised patch)

Andrew Cagney ac131313@redhat.com
Mon Dec 8 23:49:00 GMT 2003


> ---
> 
> break.c and break1.c need copyright notices.
> Andrew C can provide a list of years for break.c,
>   covering the time before it was moved to sourceware.

Fred, in case you're wondering, one of the Red Hat chores is to, on 
demand, track down the pre-history of files with no copyright status.

The history:

gdb/testsuite/gdb.base/break.c:
date: 2003/11/13 15:34:39;  author: ezannoni;  state: Exp;  lines: +14 -14
date: 2002/01/07 19:21:26;  author: law;  state: Exp;  lines: +52 -2
date: 1999/04/16 01:34:30;  author: shebs;  state: Exp;

The "pre-history":

gdb/testsuite/gdb.base/break.c:
date: 1999/10/02 00:24:35;  author: kevinb;  state: Exp;  lines: +2 -1
date: 1999/09/08 18:18:56;  author: shebs;  state: Exp;  lines: +1 -1
date: 1999/06/25 23:44:28;  author: shebs;  state: Exp;  lines: +19 -0
date: 1995/04/17 19:55:19;  author: kingdon;  state: Exp;  lines: +2 -2
date: 1995/03/24 22:06:03;  author: kung;  state: Exp;  lines: +4 -0
date: 1995/03/16 00:06:48;  author: grossman;  state: Exp;  lines: +3 -3
date: 1994/06/07 01:56:04;  author: shebs;  state: Exp;

gdb/testsuite/gdb.t06/gdbme.c (yep!):
date: 1994/06/07 22:51:18;  author: shebs;  state: dead;  lines: +0 -0
date: 1993/02/25 18:51:37;  author: ian;  state: Exp;

gdb/testsuite/gdb.t06/in-gdb.c (I kid you not!):
date: 1993/02/25 18:51:38;  author: ian;  state: dead;  lines: +0 -0
date: 1993/02/21 20:01:14;  author: mtw;  state: Exp;
         * gdb/testsuite: Initial creation of gdb/testsuite.
         Migrated dejagnu testcases and support files for testing nm to
         gdb/testsuite from deja-gnu.  These files were moved "as is"
         with no modifications.  This migration is part of a major overhaul
         of dejagnu.  The modifications to these testcases, etc., which
         will allow them to work with the new version of dejagnu will be
         made in a future update.

deja-gnu/deja-gnu/gdb.t06/in-gdbme.c (I kid you not!):
date: 1993/10/14 00:10:57;  author: rich;  state: dead;  lines: +0 -0
date: 1992/11/04 22:31:42;  author: ian;  state: Exp;  lines: +13 -0
date: 1992/10/23 18:57:46;  author: ian;  state: Exp;  lines: +18 -4
date: 1992/08/09 05:03:10;  author: rob;  state: Exp;  lines: +6 -1
date: 1992/07/18 03:22:58;  author: rob;  state: Exp;

So not a bad list of copyright years!

Andrew

PS: In case no one believes me, this is the original code:

#include <stdio.h>

/*
  * The following functions do nothing useful.  They are included simply
  * as places to try setting breakpoints at.  They are explicitly
  * "one-line functions" to verify that this case works (some versions
  * of gcc have or have had problems with this).
  */

int marker1 () { return (0); }
int marker2 (a) int a; { return (1); }
void marker3 (a, b) char *a, *b; {}
void marker4 (d) long d; {}

/*
  *      This simple classical example of recursion is useful for
  *      testing stack backtraces and such.
  */

main (argc, argv, envp)
int argc;
char *argv[], **envp;
{
     if (argc != 2) {
         fprintf (stderr, "usage:  factorial <number>\n");
         exit (1);
     } else {
         printf ("%d\n", factorial (atoi (argv[1])));
     }
     marker1 ();
     marker2 (43);
     marker3 ("stack", "trace");
     marker4 (177601976L);
     exit (0);
}

int factorial (value)
int value;
{
     if (value > 1) {
         value *= factorial (value - 1);
     }
     return (value);
}




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