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395c228bee
putty-source/unix
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Simon Tatham 395c228bee Adopt a new universal implementation of smemclr(). 
This new implementation uses the same optimisation-barrier technique
that I used in various places in testsc: have a no-op function, and a
volatile function pointer pointing at it, and then call through the
function pointer, so that nothing actually happens (apart from the
physical call and return) but the compiler has to assume that
_anything_ might have happened.

Doing this just after a memset enforces that the compiler can't have
thrown away the memset, because the called function might (for
example) check that all the memory really is zero and abort if not.

I've been turning this over in my mind ever since coming up with the
technique for testsc. I think it's far more robust than the previous
smemclr technique: so much so that I'm switching to using it
_everywhere_, and no longer using platform alternatives like Windows's
SecureZeroMemory().
2021-04-18 08:30:44 +01:00
..
utils New library-style 'utils' subdirectories. 2021-04-18 08:18:27 +01:00
CMakeLists.txt Adopt a new universal implementation of smemclr(). 2021-04-18 08:30:44 +01:00
gtkapp.c Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
gtkask.c Unix pageant: handle askpass dialog close button. 2021-04-05 18:00:16 +01:00
gtkcfg.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
gtkcols.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
gtkcols.h Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
gtkcomm.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
gtkcompat.h gtkcompat.h: fix GTK1 implementation of ref_sink. 2019-11-02 08:26:14 +00:00
gtkdlg.c dialog system: add a side-by-side alignment feature. 2021-04-10 09:43:25 +01:00
gtkfont.c unifontsel: add extra double-checks of fontinfo values. 2021-04-10 08:57:24 +01:00
gtkfont.h Support SGR 9 for strikethrough effect on text. 2020-08-13 21:08:53 +01:00
gtkmain.c GTK: fix control flow in do_cmdline(). 2020-06-21 16:39:47 +01:00
gtkmisc.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkmisc.h Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkwin.c gtkwin: remove a redundant test in delete_window. 2021-04-10 09:15:26 +01:00
osxlaunch.c osxlaunch: stop setting DYLD_LIBRARY_PATH. 2017-12-20 10:04:02 +00:00
procnet.c Add a /proc/net magic authenticator. 2019-03-31 10:35:10 +01:00
pterm.bundle OS X makefile: stop depending on JHBUILD_PREFIX. 2017-11-26 11:45:48 +00:00
pterm.plist Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
putty.bundle OS X makefile: stop depending on JHBUILD_PREFIX. 2017-11-26 11:45:48 +00:00
putty.plist Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
unix.h Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
ux_x11.c Make dupcat() into a variadic macro. 2019-10-14 19:42:37 +01:00
uxagentc.c Merge the two low-level portfwd setup systems. 2020-01-27 19:40:50 +00:00
uxagentsock.c Fix a few 'triple letter in place of double' typos. 2021-01-17 09:18:42 +00:00
uxcfg.c Rework per-backend GUI configuration. 2020-03-10 21:27:57 +00:00
uxcliloop.c Factor out common code from Unix CLI main loops. 2020-02-07 19:14:32 +00:00
uxcons.c Console host key prompts: add 'more info' action. 2021-03-13 13:54:59 +00:00
uxfdsock.c Fix typo in a top-of-file comment. 2020-03-10 21:11:14 +00:00
uxgen.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
uxgss.c Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
uxnet.c Change vtable defs to use C99 designated initialisers. 2020-03-10 21:06:29 +00:00
uxnogtk.c Include the compile-time GTK version in the build info. 2017-02-15 19:32:42 +00:00
uxnoise.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
uxpeer.c Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
uxpgnt.c Remove stub functions that are no longer needed. 2021-04-18 08:30:44 +01:00
uxplink.c Remove MD5 fingerprints from usage messages. 2021-03-27 18:39:16 +00:00
uxprint.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
uxproxy.c Make the plug_log type code into an enum. 2020-02-07 19:17:45 +00:00
uxpsusan.c psusan: write a man page. 2020-12-13 12:36:38 +00:00
uxpterm.c Move all window-title management into Terminal. 2021-02-07 19:59:20 +00:00
uxpty.c Remove weird test and definition of HAVE_PUTUTLINE. 2021-04-18 08:18:27 +01:00
uxputty.c Move all window-title management into Terminal. 2021-02-07 19:59:20 +00:00
uxsel.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
uxser.c Fix a few memory leaks spotted by Coverity. 2021-04-10 08:59:27 +01:00
uxserver.c Uppity: add stunt for unauthorised agent forwarding attempts. 2020-12-23 22:26:44 +00:00
uxsftp.c Fix assorted minor memory leaks. 2020-06-21 16:39:47 +01:00
uxsftpserver.c psusan: fix assertion failure in SFTP server. 2020-11-04 21:50:47 +00:00
uxshare.c Make dupcat() into a variadic macro. 2019-10-14 19:42:37 +01:00
uxsocks.c Remove stub functions that are no longer needed. 2021-04-18 08:30:44 +01:00
uxstore.c New functions to shrink a strbuf. 2020-02-09 08:51:37 +00:00
uxucs.c uxucs.c: fix type of wcrtomb return value. 2020-06-14 15:49:36 +01:00
x11misc.h Basic support for running under GDK Wayland back end. 2018-05-09 09:21:27 +01:00
xpmptcfg.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
xpmpterm.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
xpmpucfg.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
xpmputty.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00