<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> </head> <body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""> I believed I created the same failure by deleting libswr*.so, however in my case (running glxgears) I hit a SEGV in XMesaCreateVisual (calling xmdpy->screen->is_format_supported()), because xmesa_init_display() created an xmdpy with a NULL screen. I never get to the xmesa_close_display(). <div class=""><br class=""> </div> <div class="">Were you just testing with vtk, and maybe hitting a localized issue? Looks like the failure needs to be taken care of when the screen is initialized the first time.</div> <div class=""><br class=""> </div> <div class="">George</div> <div class=""><br class=""> <div> <blockquote type="cite" class=""> <div class="">On Feb 21, 2018, at 12:13 PM, Chuck Atkins <<a href="mailto:chuck.atkins@kitware.com" class="">chuck.atkins@kitware.com</a>> wrote:</div> <br class="Apple-interchange-newline"> <div class=""> <div dir="ltr" class=""> <div class="">Hi George,<br class=""> <br class=""> </div> This first showed up on one of our older dashboard machines without AVX (Nehalem processor). You can easily reproduce it by building with --with-swr-archs=knl,skx when the machine you're trying to use it on is neither. Note that dri-glx seems to handle this case just fine but xlib-glx segfaults. <br class=""> <div class="gmail_extra"><br clear="all" class=""> <div class=""> <div class="gmail_signature" data-smartmail="gmail_signature"> <div dir="ltr" class=""> <div class=""> <div dir="ltr" class=""> <div class=""> <div class="">- Chuck<br class=""> <br class=""> </div> </div> </div> </div> </div> </div> </div> <br class=""> <div class="gmail_quote">On Wed, Feb 21, 2018 at 12:36 PM, Kyriazis, George <span dir="ltr" class=""> <<a href="mailto:george.kyriazis@intel.com" target="_blank" class="">george.kyriazis@intel.com</a>></span> wrote:<br class=""> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Chuck,<br class=""> <br class=""> In which cases do you hit this? When an architecture is not supported, then swr_create_screen() falls back to a different (older) architecture.<br class=""> <br class=""> Thanks,<br class=""> <br class=""> George<br class=""> <div class="HOEnZb"> <div class="h5"><br class=""> > On Feb 21, 2018, at 8:26 AM, Chuck Atkins <<a href="mailto:chuck.atkins@kitware.com" class="">chuck.atkins@kitware.com</a>> wrote:<br class=""> ><br class=""> > This fixes a segfault exposed by a29d63ecf7 which occurs when swr is<br class=""> > used on an unsupported architecture.<br class=""> ><br class=""> > Signed-off-by: Chuck Atkins <<a href="mailto:chuck.atkins@kitware.com" class="">chuck.atkins@kitware.com</a>><br class=""> > Cc: <a href="mailto:mesa-stable@lists.freedesktop.org" class="">mesa-stable@lists.freedesktop.<wbr class="">org</a><br class=""> > Cc: George Kyriazis <<a href="mailto:george.kyriazis@intel.com" class="">george.kyriazis@intel.com</a>><br class=""> > Cc: Bruce Cherniak <<a href="mailto:bruce.cherniak@intel.com" class="">bruce.cherniak@intel.com</a>><br class=""> > ---<br class=""> > src/gallium/state_trackers/<wbr class="">glx/xlib/xm_api.c | 11 +++++++----<br class=""> > 1 file changed, 7 insertions(+), 4 deletions(-)<br class=""> ><br class=""> > diff --git a/src/gallium/state_trackers/<wbr class="">glx/xlib/xm_api.c b/src/gallium/state_trackers/<wbr class="">glx/xlib/xm_api.c<br class=""> > index 934c0aba11..3aec57e85d 100644<br class=""> > --- a/src/gallium/state_trackers/<wbr class="">glx/xlib/xm_api.c<br class=""> > +++ b/src/gallium/state_trackers/<wbr class="">glx/xlib/xm_api.c<br class=""> > @@ -182,9 +182,12 @@ xmesa_close_display(Display *display)<br class=""> > * }<br class=""> > */<br class=""> ><br class=""> > - if (xmdpy->smapi->destroy)<br class=""> > - xmdpy->smapi->destroy(xmdpy-><wbr class="">smapi);<br class=""> > - free(xmdpy->smapi);<br class=""> > + if (xmdpy->smapi)<br class=""> > + {<br class=""> > + if (xmdpy->smapi->destroy)<br class=""> > + xmdpy->smapi->destroy(xmdpy-><wbr class="">smapi);<br class=""> > + free(xmdpy->smapi);<br class=""> > + }<br class=""> ><br class=""> > XFree((char *) info);<br class=""> > }<br class=""> > @@ -767,7 +770,7 @@ XMesaVisual XMesaCreateVisual( Display *display,<br class=""> > XMesaVisual v;<br class=""> > GLint red_bits, green_bits, blue_bits, alpha_bits;<br class=""> ><br class=""> > - if (!xmdpy)<br class=""> > + if (!xmdpy || !xmdpy->screen)<br class=""> > return NULL;<br class=""> ><br class=""> > /* For debugging only */<br class=""> > --<br class=""> > 2.14.3<br class=""> ><br class=""> > ______________________________<wbr class="">_________________<br class=""> </div> </div> <div class="HOEnZb"> <div class="h5">> mesa-dev mailing list<br class=""> > <a href="mailto:mesa-dev@lists.freedesktop.org" class="">mesa-dev@lists.freedesktop.org</a><br class=""> > <a href="https://lists.freedesktop.org/mailman/listinfo/mesa-dev" rel="noreferrer" target="_blank" class=""> https://lists.freedesktop.org/<wbr class="">mailman/listinfo/mesa-dev</a><br class=""> <br class=""> </div> </div> </blockquote> </div> <br class=""> </div> </div> _______________________________________________<br class=""> mesa-dev mailing list<br class=""> <a href="mailto:mesa-dev@lists.freedesktop.org" class="">mesa-dev@lists.freedesktop.org</a><br class=""> https://lists.freedesktop.org/mailman/listinfo/mesa-dev<br class=""> </div> </blockquote> </div> <br class=""> </div> </body> </html>