external/graphite: work around -fsanitize=nonnull-attribute/vptr

Change-Id: Ic0766555dc7a04bbb8c7ad8f9cba3d74d84c59db

external/graphite/UnpackedTarball_graphite.mk

@@ -11,10 +11,13 @@ $(eval $(call gb_UnpackedTarball_UnpackedTarball,graphite))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,graphite,$(GRAPHITE_TARBALL)))
 
+$(eval $(call gb_UnpackedTarball_set_patchlevel,graphite,0))
+
 # http://projects.palaso.org/issues/1115
 $(eval $(call gb_UnpackedTarball_add_patches,graphite,\
 	external/graphite/graphite2.issue1115.patch.1 \
     external/graphite/graphite2.win64.patch.1 \
+    external/graphite/ubsan.patch \
 ))
 
 # vim: set noet sw=4 ts=4:

external/graphite/ubsan.patch

+--- src/Pass.cpp
++++ src/Pass.cpp
+@@ -294,7 +294,7 @@
+         s->rules = begin;
+         s->rules_end = (end - begin <= FiniteStateMachine::MAX_RULES)? end :
+             begin + FiniteStateMachine::MAX_RULES;
+-        qsort(begin, end - begin, sizeof(RuleEntry), &cmpRuleEntry);
++        if (end != begin) qsort(begin, end - begin, sizeof(RuleEntry), &cmpRuleEntry);
+     }
+ 
+     return true;
+--- src/gr_face.cpp
++++ src/gr_face.cpp
+@@ -87,7 +87,7 @@
+ 
+     Face *res = new Face(appFaceHandle, *ops);
+     if (res && load_face(*res, faceOptions))
+-        return static_cast<gr_face *>(res);
++        return reinterpret_cast<gr_face *>(res);
+ 
+     delete res;
+     return 0;
+@@ -195,7 +195,7 @@
+ 
+ void gr_face_destroy(gr_face *face)
+ {
+-    delete face;
++    delete static_cast<Face *>(face);
+ }
+ 
+ 
+--- src/gr_font.cpp
++++ src/gr_font.cpp
+@@ -50,7 +50,7 @@
+     if (face == 0)  return 0;
+ 
+     Font * const res = new Font(ppm, *face, appFontHandle, font_ops);
+-    return static_cast<gr_font*>(res);
++    return reinterpret_cast<gr_font*>(res);
+ }
+ 
+ gr_font* gr_make_font_with_advance_fn(float ppm/*pixels per em*/, const void* appFontHandle/*non-NULL*/, gr_advance_fn getAdvance, const gr_face * face/*needed for scaling*/)
+@@ -61,7 +61,7 @@
+ 
+ void gr_font_destroy(gr_font *font)
+ {
+-    delete font;
++    delete static_cast<Font *>(font);
+ }
+ 
+