linux-kernel - Re: [PATCH] perf build: Specify libtraceevent dir to rpath for asan/msan build

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Date: Mon, 13 May 2024 10:57:22 -0700
From: Ian Rogers <irogers@...gle.com>
To: Yang Jihong <yangjihong@...edance.com>
Cc: peterz@...radead.org, mingo@...hat.com, acme@...nel.org, 
	namhyung@...nel.org, mark.rutland@....com, alexander.shishkin@...ux.intel.com, 
	jolsa@...nel.org, adrian.hunter@...el.com, kan.liang@...ux.intel.com, 
	james.clark@....com, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf build: Specify libtraceevent dir to rpath for
 asan/msan build

On Mon, May 13, 2024 at 12:53 AM Yang Jihong <yangjihong@...edance.com> wrote:
>
> Hello,
>
> On 5/9/24 07:18, Ian Rogers wrote:
> > On Mon, May 6, 2024 at 1:17 AM Yang Jihong <yangjihong@...edance.com> wrote:
> >>
> >> perf built by asan/msan will not search for shared libraries in the
> >> -L directory. For cross-compilation, we assume that sanitizers is
> >> generally not enabled and add libtraceevent dir to rpath in a simple way.
> >>
> >> 1. msan build
> >>
> >> Before:
> >>    $ make -C tools/perf O=/tmp/perf DEBUG=1 EXTRA_CFLAGS="-O0 -g -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins" CC=clang CXX=clang++ HOSTCC=clang NO_LIBELF=1 BUILD_BPF_SKEL=0 NO_LIBPFM=1 LIBTRACEEVENT_DIR=/opt/libtraceevent
> >>    ...
> >>    $ /tmp/perf/perf
> >>    /tmp/perf/perf: error while loading shared libraries: libtraceeventso.1: cannot open shared object file: No such file or directory
> >>
> >> After:
> >>    $ make -C tools/perf O=/tmp/perf DEBUG=1 EXTRA_CFLAGS="-O0 -g -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins" CC=clang CXX=clang++ HOSTCC=clang NO_LIBELF=1 BUILD_BPF_SKEL=0 NO_LIBPFM=1 LIBTRACEEVENT_DIR=/opt/libtraceevent
> >>    ...
> >>    $ /tmp/perf/perf --build-options
> >>    perf version 6.9.0-rc5
> >>    <SNIP>
> >>             libtraceevent: [ on  ]  # HAVE_LIBTRACEEVENT
> >>    <SNIP>
> >>
> >>   2. asan build
> >>
> >> Before:
> >>    $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address' LIBTRACEEVENT_DIR=/opt/libtraceevent
> >>    ...
> >>    $ ./perf
> >>    ./perf: error while loading shared libraries: libtraceevent.so.1: cannot open shared object file: No such file or directory
> >>
> >> After:
> >>     $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address' LIBTRACEEVENT_DIR=/opt/libtraceevent
> >>     ...
> >>     $ ./perf --build-options
> >>     perf version 6.9.0-rc5
> >>     <SNIP>
> >>              libtraceevent: [ on  ]  # HAVE_LIBTRACEEVENT
> >>     <SNIP>
> >>
> >> Signed-off-by: Yang Jihong <yangjihong@...edance.com>
> >> ---
> >>   tools/perf/Makefile.config | 4 ++++
> >>   1 file changed, 4 insertions(+)
> >>
> >> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> >> index 7f1e016a9253..a9a923358604 100644
> >> --- a/tools/perf/Makefile.config
> >> +++ b/tools/perf/Makefile.config
> >> @@ -188,6 +188,10 @@ TRACEEVENTLIBS := -ltraceevent
> >>   ifdef LIBTRACEEVENT_DIR
> >>     LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
> >>     LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
> >> +  # Specify rpath for asan/msan build. Generally, cross-compilation will not enable sanitizers.
> >> +  ifeq ($(findstring -fsanitize=,${EXTRA_CFLAGS}),-fsanitize=)
> >> +    LIBTRACEEVENT_LDFLAGS += -Wl,-rpath,$(LIBTRACEEVENT_DIR)/lib
> >> +  endif
> >
> > Thanks for this! I found I need the following to make it work:
> > ```
> > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > index a9a923358604..bcf4ab292462 100644
> > --- a/tools/perf/Makefile.config
> > +++ b/tools/perf/Makefile.config
> > @@ -190,7 +190,11 @@ ifdef LIBTRACEEVENT_DIR
> >    LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
> >    # Specify rpath for asan/msan build. Generally, cross-compilation
> > will not enable sanitizers.
> >    ifeq ($(findstring -fsanitize=,${EXTRA_CFLAGS}),-fsanitize=)
> > -    LIBTRACEEVENT_LDFLAGS += -Wl,-rpath,$(LIBTRACEEVENT_DIR)/lib
> > +    ifeq (${IS_64_BIT}, 1)
> > +      LIBTRACEEVENT_LDFLAGS += -Wl,-rpath,$(LIBTRACEEVENT_DIR)/lib64
> > +    else
> > +      LIBTRACEEVENT_LDFLAGS += -Wl,-rpath,$(LIBTRACEEVENT_DIR)/lib
> > +    endif
> >    endif
> > endif
> > FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
> > ```
> >
> > My libtraceevent build command is:
> > $ make EXTRA_CFLAGS="-O0 -g -fsanitize=address" DESTDIR=~/libtrace install
> My build environment only uses make, not make install, so the library
> path is lib, not lib64, which leads to this difference.
>
>    # cd /opt/libtraceevent
>    # CROSS_COMPILE=aarch64-linux-gnu- make
>
> In order to be compatible with both situations, would it be better for
> us to also add the lib64 path to -L and rpath?
>
> I have sent the v2 version and added it to path2. Please help me see if
> this solution is OK:
> https://lore.kernel.org/all/20240513074910.1660373-1-yangjihong@bytedancecom/

That fixed the issue for me. Thanks!

Ian

>
> Thanks,
> Yang