lkml.org 
[lkml]   [2019]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 01/16] perf: add doc for how to build perf with Asan and UBSan
Sorry for delay.

On Mon, Mar 18, 2019 at 11:07:58AM +0100, Jiri Olsa wrote:
> On Sat, Mar 16, 2019 at 04:05:41PM +0800, Changbin Du wrote:
> > AddressSanitizer (or ASan) and UndefinedBehaviorSanitizer (or UBSan) are
> > very useful tools to detect program bugs.
> > o AddressSanitizer (or ASan) is a GCC feature that detects memory
> > corruption bugs such as buffer overflows or memory leaks.
> > o UndefinedBehaviorSanitizer (or UBSan) is a fast undefined behavior
> > detector supprted by GCC. UBSan detect undefined behavior of programs
> > at runtime.
> >
> > This patch adds doc for how to use them on perf. Later patches will fix
> > some of the issues disclosed by them.
> >
> > Signed-off-by: Changbin Du <changbin.du@gmail.com>
> > ---
> > tools/perf/Documentation/Build.txt | 20 ++++++++++++++++++++
> > 1 file changed, 20 insertions(+)
> >
> > diff --git a/tools/perf/Documentation/Build.txt b/tools/perf/Documentation/Build.txt
> > index f6fc6507ba55..cae6e1d9b901 100644
> > --- a/tools/perf/Documentation/Build.txt
> > +++ b/tools/perf/Documentation/Build.txt
> > @@ -47,3 +47,23 @@ Those objects are then used in final linking:
> >
> > NOTE this description is omitting other libraries involved, only
> > focusing on build framework outcomes
>
> thanks for adding doc, one nit:
>
> > +
> > +3) buld and install perf
>
> there's already:
> 2) perf build
> =============
>
> please use something like
>
> 3) perf build for ASan/UBSan
> ============================
>
> > + $ cd tools/perf
> > + $ make DESTDIR=/usr
> > + $ make DESTDIR=/usr install
> > +
> > +4) build with ASan or UBSan
>
> no need for this label
>
Thanks, I saw Arnaldo already taked this change with your suggestion.

> > +AddressSanitizer (or ASan) is a GCC feature that detects memory corruption bugs
> > +such as buffer overflows or memory leaks.
> > + $ cd tools/perf
> > + $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address'
> > + $ ASAN_OPTIONS=log_path=asan.log ./perf record -a
> > +ASan outputs all detected issues into log file 'asan.log.<pid>'.
> > +
> > +UndefinedBehaviorSanitizer (or UBSan) is a fast undefined behavior detector
> > +supprted by GCC. UBSan detect undefined behavior of programs at runtime.
> > + $ cd tools/perf
> > + $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=undefined'
> > + $ UBSAN_OPTIONS=print_stacktrace=1 ./perf record -a
> > +If UBSan detects any problem at runtime, it outputs a “runtime error:” message.
> > \ No newline at end of file
> > --
> > 2.19.1
> >

--
Cheers,
Changbin Du

\
 
 \ /
  Last update: 2019-03-20 12:59    [W:0.083 / U:0.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site