[libvirt] [PATCH 1/7] sa_assert: new assert-like macro, enabled only for use with static analyzers

Jim Meyering jim at meyering.net
Wed Apr 14 16:02:30 UTC 2010

From: Jim Meyering <meyering at redhat.com>

Among some here, there is a strong aversion to use of "assert", yet
some others think it is essential (when applied judiciously) even --
perhaps "especially" -- at the heart of libraries and core hypervisor-
related code.
Here is a compromise that lets us make assertions about the code (e.g.,
to tell static analyzers about invariants) without even a hint of risk
of an abort.
* src/internal.h [STATIC_ANALYSIS]: Include <assert.h>.
(sa_assert): Define.  A no-op most of the time, but equivalent
to classical assert when STATIC_ANALYSIS is nonzero.
 src/internal.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/internal.h b/src/internal.h
index 2e73210..4be17d8 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -9,6 +9,13 @@
 # include <limits.h>
 # include <verify.h>

+#  include <assert.h>
+#  define sa_assert(expr) assert (expr)
+# else
+#  define sa_assert(expr) /* empty */
+# endif
 #  include <sys/syslimits.h>
 # endif

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