Attachment 73167 Details for Bug 59429 – fix

[patch] fix

p (text/plain), 1.62 KB, created by fjhenigman on 2013-01-16 22:13:20 UTC

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Creator: fjhenigman

Created: 2013-01-16 22:13:20 UTC

Size: 1.62 KB

patch

obsolete

>Author: Frank Henigman <fjhenigman@google.com>
>Date:   Wed Jan 16 16:49:35 2013 -0500
>
>    intel: handle bad uniform access in remove_dead_constants().
>    
>    fs_visitor::remove_dead_constants() hits an assert if the shader code
>    contains an out-of-bounds array access.  Obvious instances of that are
>    caught before this point, but evidently the check is not done after code
>    transformations like loop unrolling.  See
>    https://bugs.freedesktop.org/show_bug.cgi?id=59429
>    
>    Signed-off-by: Frank Henigman <fjhenigman@google.com>
>
>diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
>index 0d2dde7..9ce49c7 100644
>--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
>+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
>@@ -1463,7 +1463,10 @@ fs_visitor::remove_dead_constants()
> 	    if (inst->src[i].file != UNIFORM)
> 	       continue;
> 
>-	    assert(constant_nr < (int)c->prog_data.nr_params);
>+	    if (constant_nr >= (int)c->prog_data.nr_params) {
>+	       fail("accessed non-existent uniform");
>+	       return false;
>+	    }
> 
> 	    /* For now, set this to non-negative.  We'll give it the
> 	     * actual new number in a moment, in order to keep the
>diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
>index 5885989..edc6dde 100644
>--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
>+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
>@@ -2325,6 +2325,7 @@ fs_visitor::fs_visitor(struct brw_context *brw,
>    this->force_sechalf_stack = 0;
> 
>    memset(&this->param_size, 0, sizeof(this->param_size));
>+   this->params_remap = NULL;
> }
> 
> fs_visitor::~fs_visitor()

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Attachments on bug 59429: 73106 | 73167 | 79636

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