Module Name: src Committed By: kamil Date: Sun Sep 22 23:13:10 UTC 2019
Modified Files: src/sys/sys: cdefs.h Log Message: Make __CTASSERT static assert again Today GCC/Clang allow to specify typedef char[] with the dynamic VLA property (as introduced in C99). This means that __CTASSERT(), when misused with run-time semantics, was a dummy check generating either 1 or -1 size of typedef char[]. It was caught in runtime by kUBSan as -1 is size of VLA with unspecified semantics in runtime (Undefined Behavior). Use bit-field to enforce compile-time constant. This approach has been inspired by the Perl variation of static_assert(). To generate a diff of this commit: cvs rdiff -u -r1.144 -r1.145 src/sys/sys/cdefs.h Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.