[13703] in Athena Bugs
gcc bounds
daemon@ATHENA.MIT.EDU (Pete Wyckoff)
Mon Jul 31 12:06:10 1995
To: bugs@MIT.EDU
Date: Mon, 31 Jul 1995 12:05:58 EDT
From: Pete Wyckoff <petew@MIT.EDU>
When using gcc with bounds checking on a sun4m_53, the following program
produces an odd result:
main()
{
printf("foo\n");
}
Compiled with:
gcc -V2.7.0 -fbounds-checking -o x x.c
It aborts, printing:
Bounds error: invalid destination pointer used in memcpy.
Pointer value: 0xef7b8c38
Abort
Code which does not call printf() or fprintf() seems to work correctly, and
writing outside of array bounds is detected and reported properly.
Incidentally, replacing all occurances of printf() with
{ char s[..]; sprintf(s, ..); fputs(s, stdout); }
works around the problem.
-- Pete (pw)
