🚀 go-pugleaf

Well, it might not be a bug, but there is a definate descrepincy.  The
following C-code compiled fine under AIX 3.2.5 cc, OSF/1 cc and HP-UX
9.05 cc, but the last code block would cause a Segmentation fault if it
was compiled with either gcc 2.6.3 or gcc 2.7.1 on all platforms.

Is there something from the C-spec I'm missing?  is the code buggy or is
this a gcc problem?

I traced through all of the compield versions with gdb and the
Segmentation fault is occuring in the "*i = tolower (*i)" line in
strlower.  NOTE:  the first two "blocks" of output worked fine, but
third call would generate the fault.

The program was compiled with -O0 -pg -g for gcc, -Aa -pg for Hp-UX,and
-O -pg -g for AIX and OSF/1.

The binary was executed as:

./a.out 'THIS IS a e12932723841786^%@#(@$@$SADjasdSAD TEST!'

If anyone has any clues about what is going on here I would appreciate
the help.  I am not the most experienced C programmer and I know *VERY*
little about compiler design.

Thanks,

-Alan Wild

----[cut here]----


#include <stdio.h>
#include <ctype.h>
#include <string.h>

char *strlower ( char messy[] ) {

	char	*i;

	for (i = messy; *i; i++) 
		*i = tolower(*i);

	return (messy);
}

int main( int argc, char *argv[] ) {

	char *strlower ( char[] );
	char messy[] = "THIS IS a e12932723841786^%@#(@$@$SADjasdSAD TEST!";
	char *messy2 = "THIS IS a e12932723841786^%@#(@$@$SADjasdSAD TEST!";
	char *bob;
	int garbage=0;

	printf("length of string: %ld, messy: %s\n", strlen(messy), messy);
	printf("%s\n", strlower(messy) );

	if (argc - 1) {
 		bob = argv[1];
		printf("\nlength of string: %ld, bob: %s\n", strlen(bob), bob);
		printf("%s\n", strlower(bob) );
	}

	printf("\nlength of string: %ld, messy2: %s\n", strlen(messy2), messy2);
	printf("%s\n", strlower(messy2) );

	return (garbage);
}


--
Alan Wild
Office Phone:   (503)677-4538
arwild01@starbase.spd.louisville.edu
f/s/c  arwild01@scic.intel.com