util: document why we have alloca_align()

2025-03-09 12:58:26 +03:00 · 2014-12-12 02:33:48 +01:00 · 2014-12-12 02:33:48 +01:00 · 257224b0cd
commit 257224b0cd
parent ae6c3cc009
1 changed files with 1 additions and 0 deletions
--- a/src/shared/util.h
+++ b/src/shared/util.h
@ -883,6 +883,7 @@ int unlink_noerrno(const char *path);
                (void *) memset(_new_, 0, _len_);       \
        })

+/* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
 #define alloca_align(size, align)                                       \
        ({                                                              \
                void *_ptr_;                                            \