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| author | Florian Weimer <fweimer@redhat.com> | 2024-05-18 09:33:19 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2024-05-18 09:33:19 +0200 |
| commit | 8d7b6b4cb27d4dec1dd5f7960298c1699275f962 (patch) | |
| tree | d3233e6a49dbde86dee8ea46920714a1adbbddb7 /sysdeps/unix | |
| parent | 2a99e2398d9d717c034e915f7846a49e623f5450 (diff) | |
| download | glibc-8d7b6b4cb27d4dec1dd5f7960298c1699275f962.zip glibc-8d7b6b4cb27d4dec1dd5f7960298c1699275f962.tar.gz glibc-8d7b6b4cb27d4dec1dd5f7960298c1699275f962.tar.bz2 | |
socket: Use may_alias on sockaddr structs (bug 19622)
This supports common coding patterns. The GCC C front end before
version 7 rejects the may_alias attribute on a struct definition
if it was not present in a previous forward declaration, so this
attribute can only be conditionally applied.
This implements the spirit of the change in Austin Group issue 1641.
Suggested-by: Marek Polacek <polacek@redhat.com>
Suggested-by: Jakub Jelinek <jakub@redhat.com>
Reviewed-by: Sam James <sam@gentoo.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/bits/socket.h | 4 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/net/if_packet.h | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/netash/ash.h | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/neteconet/ec.h | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/netiucv/iucv.h | 2 |
5 files changed, 6 insertions, 6 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h index 86444f0..5ab19a8 100644 --- a/sysdeps/unix/sysv/linux/bits/socket.h +++ b/sysdeps/unix/sysv/linux/bits/socket.h @@ -181,7 +181,7 @@ typedef __socklen_t socklen_t; #include <bits/sockaddr.h> /* Structure describing a generic socket address. */ -struct sockaddr +struct __attribute_struct_may_alias__ sockaddr { __SOCKADDR_COMMON (sa_); /* Common data: address family and length. */ char sa_data[14]; /* Address data. */ @@ -194,7 +194,7 @@ struct sockaddr #define _SS_PADSIZE \ (_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype)) -struct sockaddr_storage +struct __attribute_struct_may_alias__ sockaddr_storage { __SOCKADDR_COMMON (ss_); /* Address family, etc. */ char __ss_padding[_SS_PADSIZE]; diff --git a/sysdeps/unix/sysv/linux/net/if_packet.h b/sysdeps/unix/sysv/linux/net/if_packet.h index 9ffb69b..c17e1c2 100644 --- a/sysdeps/unix/sysv/linux/net/if_packet.h +++ b/sysdeps/unix/sysv/linux/net/if_packet.h @@ -26,7 +26,7 @@ From Linux 2.1 the AF_PACKET interface is preferred and you should consider using it in place of this one. */ -struct sockaddr_pkt +struct __attribute_struct_may_alias__ sockaddr_pkt { __SOCKADDR_COMMON (spkt_); unsigned char spkt_device[14]; diff --git a/sysdeps/unix/sysv/linux/netash/ash.h b/sysdeps/unix/sysv/linux/netash/ash.h index 7d885d1..7a6ff50 100644 --- a/sysdeps/unix/sysv/linux/netash/ash.h +++ b/sysdeps/unix/sysv/linux/netash/ash.h @@ -22,7 +22,7 @@ #include <features.h> #include <bits/sockaddr.h> -struct sockaddr_ash +struct __attribute_struct_may_alias__ sockaddr_ash { __SOCKADDR_COMMON (sash_); /* Common data: address family etc. */ int sash_ifindex; /* Interface to use. */ diff --git a/sysdeps/unix/sysv/linux/neteconet/ec.h b/sysdeps/unix/sysv/linux/neteconet/ec.h index b07a107..f3132f0 100644 --- a/sysdeps/unix/sysv/linux/neteconet/ec.h +++ b/sysdeps/unix/sysv/linux/neteconet/ec.h @@ -28,7 +28,7 @@ struct ec_addr unsigned char net; /* Network number. */ }; -struct sockaddr_ec +struct __attribute_struct_may_alias__ sockaddr_ec { __SOCKADDR_COMMON (sec_); unsigned char port; /* Port number. */ diff --git a/sysdeps/unix/sysv/linux/netiucv/iucv.h b/sysdeps/unix/sysv/linux/netiucv/iucv.h index f5fad81..27151e8 100644 --- a/sysdeps/unix/sysv/linux/netiucv/iucv.h +++ b/sysdeps/unix/sysv/linux/netiucv/iucv.h @@ -23,7 +23,7 @@ __BEGIN_DECLS -struct sockaddr_iucv +struct __attribute_struct_may_alias__ sockaddr_iucv { __SOCKADDR_COMMON (siucv_); unsigned short siucv_port; /* Reserved */ |