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From: aj@gcc.gnu.org
To: dirkjan@magma-da.com, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
	nobody@gcc.gnu.org
Subject: Re: c++/10882: passing and return by reference of char pointer corrupted on x86_64
Date: Tue, 20 May 2003 13:07:00 -0000	[thread overview]
Message-ID: <20030520130752.17015.qmail@sources.redhat.com> (raw)

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


             reply	other threads:[~2003-05-20 13:07 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-05-20 13:07 aj [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-05-20 12:36 dirkjan

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