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XQuartz: GL: Add a branch to prevent a NULL DrawablePtr structure access.

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In attach() check for pDraw being NULL, and also print an ErrorF message,
because we eventually want to track down why this is occuring.

It's unclear how this occurs, but as I noted in the 1.4 branch, I believe that
the DrawablePtr/struct _Drawable -> id is the member being accessed that causes
KERN_PROTECTION_FAILURE at 0x0000000000000004

This passes my tests using: env LIBGL_ALWAYS_INDIRECT=1 ./sometest.

I fixed a warning: caused by initializing the screen->base.visuals with the
configs.  It is a ** not a *.  It seems that some other part of GLX will
initialize this for us.
(cherry picked from commit 17f6a261fc)
This commit is contained in:
George Staplin 2008-11-22 10:57:58 -07:00 • committed by Jeremy Huddleston
parent bc0c7075e2
commit 429b4b20d5
1 changed files with 37 additions and 24 deletions
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25
hw/xquartz/GL/indirect.c
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@ -298,17 +298,27 @@ static void surface_notify(void *_arg, void *data) {
}
}
static void attach(__GLXAquaContext *context, __GLXAquaDrawable *draw) {
static BOOL attach(__GLXAquaContext *context, __GLXAquaDrawable *draw) {
DrawablePtr pDraw;
GLAQUA_DEBUG_MSG("attach(%p, %p)\n", context, draw);
if(NULL == context || NULL == draw)
return TRUE;
pDraw = draw->base.pDraw;
if(NULL == pDraw) {
ErrorF("%s:attach() pDraw is NULL!\n", __FILE__);
return TRUE;
}
if (draw->sid == 0) {
//if (!quartzProcs->CreateSurface(pDraw->pScreen, pDraw->id, pDraw,
if (!DRICreateSurface(pDraw->pScreen, pDraw->id, pDraw,
0, &draw->sid, NULL,
surface_notify, draw))
return;
return TRUE;
draw->pDraw = pDraw;
}
@ -323,7 +333,7 @@ static void attach(__GLXAquaContext *context, __GLXAquaDrawable *draw) {
x_hash_table_remove(surface_hash, x_cvt_uint_to_vptr(draw->sid));
draw->sid = 0;
return;
return TRUE;
}
context->isAttached = TRUE;
@ -341,6 +351,8 @@ static void attach(__GLXAquaContext *context, __GLXAquaDrawable *draw) {
GLAQUA_DEBUG_MSG("attached 0x%x to 0x%x\n", (unsigned int) pDraw->id,
(unsigned int) draw->sid);
}
return FALSE;
}
#if 0 // unused
@ -374,7 +386,8 @@ static int __glXAquaContextMakeCurrent(__GLXcontext *baseContext) {
GLAQUA_DEBUG_MSG("glAquaMakeCurrent (ctx 0x%p)\n", baseContext);
attach(context, drawPriv);
if(attach(context, drawPriv))
return /*error*/ 0;
gl_err = CGLSetCurrentContext(context->ctx);
if (gl_err != 0)
@ -1310,8 +1323,8 @@ static __GLXscreen * __glXAquaScreenProbe(ScreenPtr pScreen) {
screen->base.fbconfigs = configs;
screen->base.numFBConfigs = 1;
screen->base.visuals = configs;
screen->base.numVisuals = 1;
screen->base.visuals = NULL;
screen->base.numVisuals = 0;
GlxSetVisualConfig(GLX_ALL_VISUALS);