[(pushed)] docs: document new --param=asan-kernel-mem-intrinsic-prefix
Commit Message
gcc/ChangeLog:
* doc/invoke.texi: Document --param=asan-kernel-mem-intrinsic-prefix.
---
gcc/doc/invoke.texi | 4 ++++
1 file changed, 4 insertions(+)
Comments
On Wed, Feb 15, 2023 at 09:39:11AM +0100, Martin Liška wrote:
> gcc/ChangeLog:
>
> * doc/invoke.texi: Document --param=asan-kernel-mem-intrinsic-prefix.
Ok, thanks.
Jakub
On 2/15/23 01:39, Martin Liška wrote:
> gcc/ChangeLog:
>
> * doc/invoke.texi: Document --param=asan-kernel-mem-intrinsic-prefix.
I noticed this new text was missing Texinfo markup, so I've committed
the attached followup patch.
I also wonder why this thing and several of the other asan things were
added as parameters instead of options. --param documentation is in the
optimization options section, and the text before the table this new
blurb was inserted into reads:
"In some places, GCC uses various constants to control the amount of
optimization that is done. For example, GCC does not inline functions
that contain more than a certain number of instructions. You can
control some of these constants on the command line using the
@option{--param} option. [...]"
I guess it is too late (at least for GCC 13) to change these things to
be options and not parameters, but if we're now using --param for things
other than avoiding hard-wired magic numbers in GCC's optimizers, we
should probably move the --param documentation out of the optimization
section and rewrite the description of what it's for.
-Sandra
@@ -15809,6 +15809,10 @@ is greater or equal to this number, use callbacks instead of inline checks.
E.g. to disable inline code use
@option{--param asan-instrumentation-with-call-threshold=0}.
+@item asan-kernel-mem-intrinsic-prefix
+Prefix calls to memcpy, memset and memmove with __asan_ or __hwasan_
+for -fsanitize=kernel-address or -fsanitize=kernel-hwaddress.
+
@item hwasan-instrument-stack
Enable hwasan instrumentation of statically sized stack-allocated variables.
This kind of instrumentation is enabled by default when using