From: Jiri Olsa <jolsa@redhat.com>
To: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Namhyung Kim <namhyung@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>, Kajol Jain <kjain@linux.ibm.com>,
Andi Kleen <ak@linux.intel.com>,
John Garry <john.garry@huawei.com>,
Jin Yao <yao.jin@linux.intel.com>,
Kan Liang <kan.liang@linux.intel.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Kim Phillips <kim.phillips@amd.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Leo Yan <leo.yan@linaro.org>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org, Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 4/8] libbpf hashmap: Localize static hashmap__* symbols
Date: Fri, 15 May 2020 11:17:07 +0200 [thread overview]
Message-ID: <20200515091707.GC3511648@krava> (raw)
In-Reply-To: <20200515065624.21658-5-irogers@google.com>
On Thu, May 14, 2020 at 11:56:20PM -0700, Ian Rogers wrote:
> Localize the hashmap__* symbols in libbpf.a. To allow for a version in
> libapi.
>
> Before:
> $ nm libbpf.a
> ...
> 000000000002088a t hashmap_add_entry
> 000000000001712a t hashmap__append
> 0000000000020aa3 T hashmap__capacity
> 000000000002099c T hashmap__clear
> 00000000000208b3 t hashmap_del_entry
> 0000000000020fc1 T hashmap__delete
> 0000000000020f29 T hashmap__find
> 0000000000020c6c t hashmap_find_entry
> 0000000000020a61 T hashmap__free
> 0000000000020b08 t hashmap_grow
> 00000000000208dd T hashmap__init
> 0000000000020d35 T hashmap__insert
> 0000000000020ab5 t hashmap_needs_to_grow
> 0000000000020947 T hashmap__new
> 0000000000000775 t hashmap__set
> 00000000000212f8 t hashmap__set
> 0000000000020a91 T hashmap__size
> ...
>
> After:
> $ nm libbpf.a
> ...
> 000000000002088a t hashmap_add_entry
> 000000000001712a t hashmap__append
> 0000000000020aa3 t hashmap__capacity
> 000000000002099c t hashmap__clear
> 00000000000208b3 t hashmap_del_entry
> 0000000000020fc1 t hashmap__delete
> 0000000000020f29 t hashmap__find
> 0000000000020c6c t hashmap_find_entry
> 0000000000020a61 t hashmap__free
> 0000000000020b08 t hashmap_grow
> 00000000000208dd t hashmap__init
> 0000000000020d35 t hashmap__insert
> 0000000000020ab5 t hashmap_needs_to_grow
> 0000000000020947 t hashmap__new
> 0000000000000775 t hashmap__set
> 00000000000212f8 t hashmap__set
> 0000000000020a91 t hashmap__size
> ...
I think this will break bpf selftests which use hashmap,
we need to find some other way to include this
either to use it from libbpf directly, or use the api version
only if the libbpf is not compiled in perf, we could use
following to detect that:
CFLAGS += -DHAVE_LIBBPF_SUPPORT
$(call detected,CONFIG_LIBBPF)
jirka
next prev parent reply other threads:[~2020-05-15 9:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-15 6:56 [PATCH 0/8] Copy hashmap to libapi, use in perf expr Ian Rogers
2020-05-15 6:56 ` [PATCH 1/8] libbpf: Fix memory leak and possible double-free in hashmap__clear Ian Rogers
2020-05-15 6:56 ` [PATCH 2/8] libbpf hashmap: Remove unused #include Ian Rogers
2020-05-15 6:56 ` [PATCH 3/8] libbpf hashmap: Fix signedness warnings Ian Rogers
2020-05-15 6:56 ` [PATCH 4/8] libbpf hashmap: Localize static hashmap__* symbols Ian Rogers
2020-05-15 9:17 ` Jiri Olsa [this message]
2020-05-15 14:29 ` Arnaldo Carvalho de Melo
2020-05-15 14:53 ` Ian Rogers
2020-05-15 16:31 ` Arnaldo Carvalho de Melo
2020-05-15 16:59 ` Ian Rogers
2020-05-15 6:56 ` [PATCH 5/8] tools lib/api: Copy libbpf hashmap to libapi Ian Rogers
2020-05-15 6:56 ` [PATCH 6/8] perf test: Provide a subtest callback to ask for the reason for skipping a subtest Ian Rogers
2020-05-15 6:56 ` [PATCH 7/8] perf test: Improve pmu event metric testing Ian Rogers
2020-05-15 6:56 ` [PATCH 8/8] perf expr: Migrate expr ids table to a hashmap Ian Rogers
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