On Thu, Dec 16, 2021 at 04:35:39PM +0100, Kornel Benko wrote:
> As strings:
> (gdb) x/10s &addr
> 0x7fffffffd788: "\001"
> 0x7fffffffd78a: "/tmp/lyx_tmpdir.kVhnZYL31128/lyxsocket"
> 0x7fffffffd7b1: ""
> 0x7fffffffd7b2: ""
> 0x7fffffffd7b3: ""
> 0x7fffffffd7b4: ""
> 0x7fffffffd7b5: ""
> 0x7fffffffd7b6: ""
> 0x7fffffffd7b7: ""
> 0x7fffffffd7b8: "|"
> (gdb)
This looks fine.
Maybe it's because SUN_LEN macro.
In my system I see in /usr/include/x86_64-linux-gnu/sys/un.h
# define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ strlen ((ptr)->sun_path))
I guess clang is not happy with (((struct sockaddr_un *) 0)->sun_path)
Our own code has:
#if !defined(SUN_LEN)
#define SUN_LEN(su) \
(sizeof (*(su)) - sizeof ((su)->sun_path) + strlen((su)->sun_path))
#endif
which does not have this constrt and clang might be happier.
I do not known what headers gets included with clang though.
Pavel
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