[sr-dev] [kamailio/kamailio] shm_malloc to align on __alignof__(_max_align_t) like malloc = 16 bytes (Issue #3157)

### Description I am creating a module that uses a 3rd party library(wolfSSL), that depending on build flags, requires alignment of memory blocks to be the same as `malloc`, i.e., 16 bytes on gcc/AMD64. It seems that `shm_malloc` returns memory aligned to 8 bytes. Since system malloc always returns 16-byte aligned memory, it might be good to match that behaviour in `shm_malloc` in case future kamailio modules use libraries that expect this. ### Expected behavior `shm_malloc` returns memory aligned on `__alignof__(_max_align_t) == 16` #### Actual observed behavior `shm_malloc` returns blocks aligned on 8-bytes #### Debugging Data When allocating `*SSL_CTX` and `*SSL ` structs by tls module they occassionally will have 8 byte (and not necessarily 16-byte) alignments. OpenSSL does not require 16-byte alignments but wolfSSL requires 16-byte alignments. ### Possible Solutions * The custom memory allocators in WIP `tls_wolfssl/` could try to wrap around `shm_malloc`. * have a static build of wolfSSL that does not require 16-byte alignment ### Additional Information The default `./configure` build of wolfSSL has structs that require 16-byte alignment. wolfSSL library has a configure flag `--enable-aligndata=no` that relaxes this requirement. -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3157 You are receiving this because you are subscribed to this thread. Message ID: <kamailio/kamailio/issues/3157(a)github.com>