From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Tue, 28 Jul 2015 21:44:37 +0000 (+0100)
Subject: tools/libxl: Assert that libxl__ao_inprogress_gc() is not called with NULL
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~2664
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tools/libxl: Assert that libxl__ao_inprogress_gc() is not called with NULL

libxl__ao_inprogress_gc() is hidden behind various macros used to
construct local variables.  Assert() that NULL is not passed, to make
such an error very obvious, rather than a plain segfault at 0.

No functional change.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
---

diff --git a/tools/libxl/libxl_event.c b/tools/libxl/libxl_event.c
index 8acecfa544..bfb6b31a7f 100644
--- a/tools/libxl/libxl_event.c
+++ b/tools/libxl/libxl_event.c
@@ -1862,6 +1862,7 @@ void libxl__ao_create_fail(libxl__ao *ao)
 
 libxl__gc *libxl__ao_inprogress_gc(libxl__ao *ao)
 {
+    assert(ao);
     assert(ao->magic == LIBXL__AO_MAGIC);
     assert(!ao->complete);
     return &ao->gc;