From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17068 invoked by alias); 20 May 2003 13:07:52 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 17016 invoked by uid 48); 20 May 2003 13:07:52 -0000 Date: Tue, 20 May 2003 13:07:00 -0000 Message-ID: <20030520130752.17015.qmail@sources.redhat.com> To: dirkjan@magma-da.com, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org From: aj@gcc.gnu.org Reply-To: aj@gcc.gnu.org, dirkjan@magma-da.com, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: c++/10882: passing and return by reference of char pointer corrupted on x86_64 X-SW-Source: 2003-05/txt/msg02173.txt.bz2 List-Id: Synopsis: passing and return by reference of char pointer corrupted on x86_64 State-Changed-From-To: open->closed State-Changed-By: aj State-Changed-When: Tue May 20 13:07:52 2003 State-Changed-Why: The code is invalid, you do the following basically: int number; void *ptr; ptr = &number; *ptr = NULL; Note that int is 32-bit and a pointer is 64-bit on x86-64. You therefore override some random memory, in this case the string popped_name. Since your code is not 64-bit clean, and you explicitly shut GCC up with casts to void, there's not much that GCC can do and it will produce this code. http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10882