Re: [RFC PATCH v7 37/37] perf record: Add clang options for compiling BPF scripts

Wangnan (F)
2015-06-12T06:09:17Z

On 2015/6/12 13:35, Wang Nan wrote:
> 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>
> ---
> tools/perf/builtin-record.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index c15865f..3ec8cee 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -30,6 +30,7 @@
> #include "util/auxtrace.h"
> #include "util/parse-branch-options.h"
> #include "util/bpf-loader.h"
> +#include "util/llvm-utils.h"
>
> #include <unistd.h>
> #include <sched.h>
> @@ -1068,6 +1069,12 @@ struct option __record_options[] = {
> parse_clockid),
> OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
> "opts", "AUX area tracing Snapshot Mode", ""),
> +#ifdef HAVE_LIBBPF_SUPPORT"

Sorry for this extra ". It is not a part of this patch.

> + 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()
> };
>