[PATCH] misc/coverity: Model __builtin_unreachable()

[Andrew Cooper <andrew.cooper3@citrix.com>]

This resolves 23 issues Coverity had identified by following the false path of
an ASSERT().

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: coverity@xenproject.org
CC: Keir Fraser <keir@xen.org>
CC: Jan Beulich <JBeulich@suse.com>
CC: Tim Deegan <tim@xen.org>
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
 misc/coverity/model.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/misc/coverity/model.c b/misc/coverity/model.c
index fac2ecb..bd62566 100644
--- a/misc/coverity/model.c
+++ b/misc/coverity/model.c
@@ -121,6 +121,16 @@ void libxl__ctx_unlock(libxl_ctx *ctx)
 }
 
 /*
+ * Coverity doesn't understand __builtin_unreachable(), which causes it to
+ * incorrectly find issues based on continuing execution along the false
+ * branch of an ASSERT().
+ */
+void __builtin_unreachable(void)
+{
+    __coverity_panic__();
+}
+
+/*
  * Local variables:
  * mode: C
  * c-file-style: "BSD"
-- 
1.7.10.4