From: Joseph Myers Date: Wed, 15 Nov 2017 18:40:29 +0000 (+0000) Subject: Add MADV_WIPEONFORK, MADV_KEEPONFORK from Linux 4.14. X-Git-Tag: glibc-2.27~491 X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=fa680dc61455acdf8779d82c6f4bba5b48935c08;p=glibc.git Add MADV_WIPEONFORK, MADV_KEEPONFORK from Linux 4.14. This patch adds the new MADV_WIPEONFORK and MADV_KEEPONFORK from Linux 4.14 to bits/mman-linux.h (and bits/mman.h in the hppa case). Note there are further hppa MADV_* changes in 4.14; I plan a separate glibc patch for those. Tested for x86_64. * sysdeps/unix/sysv/linux/bits/mman-linux.h [__USE_MISC] (MADV_WIPEONFORK): New macro. [__USE_MISC] (MADV_KEEPONFORK): Likewise. * sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_MISC] (MADV_WIPEONFORK): Likewise. [__USE_MISC] (MADV_KEEPONFORK): Likewise. --- diff --git a/ChangeLog b/ChangeLog index 88f3ac8478..6ebdeedc24 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +2017-11-15 Joseph Myers + + * sysdeps/unix/sysv/linux/bits/mman-linux.h + [__USE_MISC] (MADV_WIPEONFORK): New macro. + [__USE_MISC] (MADV_KEEPONFORK): Likewise. + * sysdeps/unix/sysv/linux/hppa/bits/mman.h + [__USE_MISC] (MADV_WIPEONFORK): Likewise. + [__USE_MISC] (MADV_KEEPONFORK): Likewise. + 2017-11-15 Adhemerval Zanella * signal/sigrelse.c (sigrelse): Optimize implementation. diff --git a/sysdeps/unix/sysv/linux/bits/mman-linux.h b/sysdeps/unix/sysv/linux/bits/mman-linux.h index b091181960..78c07c890a 100644 --- a/sysdeps/unix/sysv/linux/bits/mman-linux.h +++ b/sysdeps/unix/sysv/linux/bits/mman-linux.h @@ -89,6 +89,8 @@ # define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, overrides the coredump filter bits. */ # define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag. */ +# define MADV_WIPEONFORK 18 /* Zero memory on fork, child only. */ +# define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK. */ # define MADV_HWPOISON 100 /* Poison a page for testing. */ #endif diff --git a/sysdeps/unix/sysv/linux/hppa/bits/mman.h b/sysdeps/unix/sysv/linux/hppa/bits/mman.h index acf7002beb..4ad9153d92 100644 --- a/sysdeps/unix/sysv/linux/hppa/bits/mman.h +++ b/sysdeps/unix/sysv/linux/hppa/bits/mman.h @@ -99,6 +99,8 @@ # define MADV_DONTDUMP 69 /* Explicity exclude from the core dump, overrides the coredump filter bits */ # define MADV_DODUMP 70 /* Clear the MADV_NODUMP flag */ +# define MADV_WIPEONFORK 71 /* Zero memory on fork, child only. */ +# define MADV_KEEPONFORK 72 /* Undo MADV_WIPEONFORK. */ #endif /* The POSIX people had to invent similar names for the same things. */