Let us avoid trapping in hardware from a SIGFPE and instead
assert on a zero divisor.
Hint: This can occur if a PIPE_PRIM_? is not handled in
u_prim_vertex_count() that results in ' info ' not
being initialized in the expected manner.
Further, we also fix a possibly NULL pointer dereference
from ' info ' being NULL from a u_prim_vertex_count() call.
Signed-off-by: Edward O'Callaghan <[email protected]>
---
src/gallium/auxiliary/util/u_prim.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/gallium/auxiliary/util/u_prim.h
b/src/gallium/auxiliary/util/u_prim.h
index 3668015..a09c315 100644
--- a/src/gallium/auxiliary/util/u_prim.h
+++ b/src/gallium/auxiliary/util/u_prim.h
@@ -145,6 +145,9 @@ u_prims_for_vertices(unsigned prim, unsigned num)
{
const struct u_prim_vertex_count *info = u_prim_vertex_count(prim);
+ assert(info);
+ assert(info->incr != 0);
+
if (num < info->min)
return 0;
--
2.5.0
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