Re: Problems with packages on a netbsd-6 sparc

[Chris Ross <cross+netbsd%distal.com@localhost>]

On 05/02/2012 04:34 AM, Martin Husemann wrote:
> Most likely a sudo bug, compile it with "-g -O2" and check the core.

  Is it really a bug in sudo if the non-optimized code works, but the 
optimized code causes a crash?

  Looking at it in gdb it certainly looks like a mis-aligned access.  
But, I'm not sure what "<optimized out>" means.

Program received signal SIGBUS, Bus error.
0x00024e24 in make_pwitem (pw=0x204a7aa8, name=0x0) at ./pwutil.c:178
178         memcpy(newpw, pw, sizeof(struct passwd));
(gdb) print newpw
$1 = <optimized out>
(gdb) print pw
$2 = (const struct passwd *) 0x204a7aa8
(gdb)


  I'll take a look at the code directly, but I still don't understand 
how it could be a code bug, rather than an optimizer bug, that only 
shows when code is optimized.

            - Chris