From d5f682a00be868e86f588ec5d452d58f7cacaa86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Sun, 2 Feb 2020 08:00:45 +0100
Subject: [PATCH] Add semantic patch to fix isc_buffer_allocate usage, it
 cannot fail now

---
 cocci/isc_buffer_allocate_never_fail.spatch | 84 +++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 cocci/isc_buffer_allocate_never_fail.spatch

diff --git a/cocci/isc_buffer_allocate_never_fail.spatch b/cocci/isc_buffer_allocate_never_fail.spatch
new file mode 100644
index 0000000000..b632e4e3b9
--- /dev/null
+++ b/cocci/isc_buffer_allocate_never_fail.spatch
@@ -0,0 +1,84 @@
+@@
+statement S;
+expression V;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- if (V != ISC_R_SUCCESS) S
+
+@@
+statement S1, S2;
+expression V;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- if (V == ISC_R_SUCCESS)
+  S1
+- else S2
+
+@@
+expression V;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- check_result(V, ...);
+
+@@
+@@
+
+- CHECK(
+  isc_buffer_allocate(...)
+- )
+  ;
+
+@@
+@@
+
+- DO(...,
+  isc_buffer_allocate(...)
+- )
+  ;
+
+@@
+@@
+
+- RETERR(
+  isc_buffer_allocate(...)
+- )
+  ;
+
+@@
+expression V;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- assert_int_equal(V, ISC_R_SUCCESS);
+
+@@
+expression V;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- CHECK(..., V);
+
+@@
+expression V;
+statement S;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- if (ISC_UNLIKELY(V != ISC_R_SUCCESS)) S
+
+@@
+expression V;
+@@
+
+- V =
+  isc_buffer_allocate(...);
+- RUNTIME_CHECK(V == ISC_R_SUCCESS);