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Groups > linux.kernel > #1219764

[PATCH 23/27] perf record: Support custom vmlinux path

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From: He Kuang <hekuang@huawei.com>

Make perf-record command support --vmlinux option if BPF_PROLOGUE is on.

'perf record' needs vmlinux as the source of DWARF info to generate
prologue for BPF programs, so path of vmlinux should be specified.

Short name 'k' has been taken by 'clockid'. This patch skips the short
option name and use '--vmlinux' for vmlinux path.

Signed-off-by: He Kuang <hekuang@huawei.com>
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/1436445342-1402-38-git-send-email-wangnan0@huawei.com
---
 tools/perf/builtin-record.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 11e7d63..43ff231 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1103,6 +1103,10 @@ struct option __record_options[] = {
 		   "clang binary to use for compiling BPF scriptlets"),
 	OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
 		   "options passed to clang when compiling BPF scriptlets"),
+#ifdef HAVE_BPF_PROLOGUE
+	OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
+		   "file", "vmlinux pathname"),
+#endif
 #endif
 	OPT_END()
 };
-- 
2.1.0

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[GIT PULL 00/27] perf tools: filtering events using eBPF programs Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 07/27] perf record: Load all eBPF object into kernel Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 22/27] perf tools: Use same BPF program if arguments are identical Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 20/27] perf tools: Add prologue for BPF programs for fetching arguments Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 17/27] perf probe: Reset args and nargs for probe_trace_event when failure Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 01/27] perf tools: Don't write to evsel if parser doesn't collect evsel Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 13/27] perf tools: Compile scriptlets to BPF objects when passing '.c' to --event Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 06/27] perf bpf: Collect 'struct perf_probe_event' for bpf_program Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 23/27] perf record: Support custom vmlinux path Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
  [PATCH 18/27] perf tools: Add BPF_PROLOGUE config options for further patches Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:20 +0200
    [tip:perf/core] perf tools: regs_query_register_offset()   infrastructure tip-bot for Wang Nan <tipbot@zytor.com> - 2015-09-16 09:40 +0200
  [PATCH 11/27] perf tools: Sync setting of real bpf events with placeholder Wang Nan <wangnan0@huawei.com> - 2015-09-06 09:30 +0200

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