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view doc/glibc-functions/explicit_bzero.texi @ 19639:41bd1e8f88b2
doc: Add info about Android 9.0.
* doc/**/*.texi: Add info about functions and headers in Bionic from
Android 9.0.
author | Bruno Haible <bruno@clisp.org> |
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date | Thu, 10 May 2018 18:16:59 +0200 |
parents | f1a31809efb2 |
children | d4661c7ea0d0 |
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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 11.3, 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