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authorWang Nan <wangnan0@huawei.com>2015-10-14 12:41:19 +0000
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-10-29 17:16:22 -0300
commit71dc2326252ff1bcdddc05db03c0f831d16c9447 (patch)
treea0582fddba604ee70b983f480f2a5dab8e45009c /tools
parent1f45b1d49073541947193bd7dac9e904142576aa (diff)
downloadlinux-71dc2326252ff1bcdddc05db03c0f831d16c9447.tar.bz2
perf record: Add clang options for compiling BPF scripts
Although previous patch allows setting BPF compiler related options in perfconfig, on some ad-hoc situation it still requires passing options through cmdline. This patch introduces 2 options to 'perf record' for this propose: --clang-path and --clang-opt. 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 Link: http://lkml.kernel.org/r/1444826502-49291-9-git-send-email-wangnan0@huawei.com [ Add the new options to the 'record' man page ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-record.txt6
-rw-r--r--tools/perf/builtin-record.c7
2 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 7ff6a9d0ea0d..e630a7d2c348 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -314,6 +314,12 @@ This option sets the time out limit. The default value is 500 ms.
Record context switch events i.e. events of type PERF_RECORD_SWITCH or
PERF_RECORD_SWITCH_CPU_WIDE.
+--clang-path::
+Path to clang binary to use for compiling BPF scriptlets.
+
+--clang-opt::
+Options passed to clang when compiling BPF scriptlets.
+
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index de02267c73d8..199fc31e3919 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -31,6 +31,7 @@
#include "util/auxtrace.h"
#include "util/parse-branch-options.h"
#include "util/parse-regs-options.h"
+#include "util/llvm-utils.h"
#include <unistd.h>
#include <sched.h>
@@ -1112,6 +1113,12 @@ struct option __record_options[] = {
"per thread proc mmap processing timeout in ms"),
OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
"Record context switch events"),
+#ifdef HAVE_LIBBPF_SUPPORT
+ OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
+ "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"),
+#endif
OPT_END()
};