Messages in this thread | | | Date | Mon, 18 Mar 2019 11:07:58 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH 01/16] perf: add doc for how to build perf with Asan and UBSan |
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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
> +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 >
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