mirror of
https://git.FreeBSD.org/src.git
synced 2024-11-28 08:02:54 +00:00
020d003c86
The _FORTIFY_SOURCE tests will be generated by a lua script to avoid a lot of redundancy in writing these tests. For each function that we're fortifying, the plan is to test at least the following three scenarios: - Writing up to one byte before the end of the buffer, - Writing up to the end of the buffer, - Writing one byte past the end of the buffer The buffer is shoved into a struct on the stack to guarantee a stack layout in which we have a valid byte after the buffer so that level 2 fortification will trip and we can have confidence that it wasn't some other stack/memory protection instead. The generated tests are divided roughly into which header we're attributing them to so that we can parallelize the build -- the full set is a bit over 9000 lines of C and takes 11s to build on the hardware that I'm testing on if it's a single monolothic file. Reviewed by: markj Sponsored by: Klara, Inc. Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D45678 |
||
|---|---|---|
| .. | ||
| BSD.debug.dist | ||
| BSD.include.dist | ||
| BSD.lib32.dist | ||
| BSD.release.dist | ||
| BSD.root.dist | ||
| BSD.sendmail.dist | ||
| BSD.tests.dist | ||
| BSD.usr.dist | ||
| BSD.var.dist | ||
| Makefile | ||
| README | ||
Note: If you modify these files, please keep hier(7) updated!
These files are used to create empty file hierarchies for building the
system into. Some notes about working with them are placed here to try
and keep them in good working order.
a) The files use 4 space indentation, and other than in the header
comments, should not contain any tabs. An indentation of 4 is
preferable to the standard indentation of 8 because the indentation
of levels in these files can become quite deep causing the line to
overflow 80 characters.
This also matches with the files generated when using the
mtree -c option, which was implemented that way for the same reason.
b) Only directories should be listed here.
c) The listing should be kept in filename sorted order.
d) Sanity checking changes to these files can be done by following
this procedure (the sed -e is ugly, but fixing mtree -c to
not emit the trailing white space would be even uglier):
mkdir /tmp/MTREE
mtree -deU -f BSD.X.dist -p /tmp/MTREE
mtree -bcdjn -F freebsd9 -k uname,gname,mode -p /tmp/MTREE | \
sed -e 's/ *$//' >BSD.X.new
diff -u BSD.X.dist BSD.X.new
rm -r /tmp/MTREE
Note that you will get some differences about /set lines,
and uname= gname= on certain directory areas, mainly man page
sections. This is caused by mtree not having a look ahead
mechanism for making better selections for these as it
traverses the hierarchy.
The BSD.X.new file should NOT be committed, as it will be missing
the correct header, and important keywords like ``nochange''.
Simply use the diff for a sanity check to make sure things are in
the correct order and correctly indented.
e) Further sanity checking of the system builds with DESTDIR=/someplace
are more complicated, but can often catch missing entries in these
files. I tend to run this more complete sanity check shortly after
the target date for a new release is announced.
If you want details on it bug me about it via email to
rgrimes@FreeBSD.org.