Define `static_assert()` when not defined by kernel

[lttng-modules.git] / include / wrapper / compiler.h

diff --git a/include/wrapper/compiler.h b/include/wrapper/compiler.h
index 4efe0cfa671fab25b6b283543512b25903668425..ade06fe702de4e4133868fb7ece4509b4c0369de 100644 (file)
--- a/include/wrapper/compiler.h
+++ b/include/wrapper/compiler.h
@@ -9,7 +9,7 @@
 #define _LTTNG_WRAPPER_COMPILER_H
 
 #include <linux/compiler.h>
-#include <linux/version.h>
+#include <lttng/kernel-version.h>
 
 /*
  * Don't allow compiling with buggy compiler.
@@ -25,6 +25,16 @@
 #   error Your gcc version produces clobbered frame accesses
 #  endif
 # endif
+
+/*
+ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
+ */
+# ifdef __aarch64__
+#  if GCC_VERSION < 50100
+#   error Your gcc version performs unsafe access to deallocated stack
+#  endif
+# endif
+
 #endif
 
 /*
@@ -46,7 +56,7 @@
  * and remove calls to smp_read_barrier_depends which was dropped
  * in v5.9.
  */
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0))
 #define LTTNG_READ_ONCE(x)     READ_ONCE(x)
 #else
 #define LTTNG_READ_ONCE(x)                     \
@@ -59,4 +69,16 @@
 
 #define __LTTNG_COMPOUND_LITERAL(type, ...)    (type[]) { __VA_ARGS__ }
 
+/*
+ * The static_assert macro was defined by the kernel in v5.1.
+ * If the macro is not defined, we define it.
+ * (kernel source: include/linux/build_bug.h)
+ */
+#ifndef static_assert
+
+# define static_assert(expr, ...)  __static_assert(expr, ##__VA_ARGS__, #expr)
+# define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
+
+#endif
+
 #endif /* _LTTNG_WRAPPER_COMPILER_H */