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view doc/glibc-functions/explicit_bzero.texi @ 39913:73d60b1f9c96
doc: Update for Solaris 11.4.
* doc/**/*.texi: For bugs that exist in both Solaris 11.3 and 11.4,
mention Solaris 11.4.
* m4/printf.m4: Update comments about Solaris.
* m4/log.m4: Likewise.
* m4/log10.m4: Likewise.
* m4/logb.m4: Likewise.
* m4/logbf.m4: Likewise.
* m4/logbl.m4: Likewise.
* m4/rename.m4: Likewise.
* m4/wcrtomb.m4: Likewise.
* m4/hostent.m4: Likewise.
* m4/servent.m4: Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sun, 14 Oct 2018 09:33:46 +0200 |
parents | 41bd1e8f88b2 |
children |
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@node explicit_bzero @subsection @code{explicit_bzero} @findex explicit_bzero Gnulib module: explicit_bzero The @code{explicit_bzero} function is an approximation to what is needed, and does not suffice in general to erase information. Although calling @code{explicit_bzero} should clear the memory in question, the information that was in memory may still be available elsewhere on the machine. Proper implementation of information erasure requires support from levels below C code. Portability problems fixed by Gnulib: @itemize @item This function is missing on some platforms: glibc 2.24, FreeBSD 10, NetBSD 7.1, OpenBSD 5.4, macOS 10.12, Solaris 11.4, Android 9.0, and many other systems. @end itemize Portability problems not fixed by Gnulib: @itemize @item Although the module's implementation should clear the memory on platforms compatible with GCC and on platforms using traditional linkers, it may not clear the memory on non-GCC platforms that use whole-program optimization. @end itemize