linux-kernel - [tip:perf/core] perf bpf: Add syscall

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Date:   Thu, 6 Sep 2018 06:18:21 -0700
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, dsahern@...il.com,
        wangnan0@...wei.com, adrian.hunter@...el.com, acme@...hat.com,
        hpa@...or.com, mingo@...nel.org, namhyung@...nel.org,
        jolsa@...nel.org, tglx@...utronix.de
Subject: [tip:perf/core] perf bpf: Add syscall_exit() helper

Commit-ID:  664b6a95d771a6dcd7069996c825a03be411ef99
Gitweb:     https://git.kernel.org/tip/664b6a95d771a6dcd7069996c825a03be411ef99
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Thu, 30 Aug 2018 08:48:44 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 30 Aug 2018 15:52:20 -0300

perf bpf: Add syscall_exit() helper

So that we can hook to the syscalls:sys_exit_SYSCALL tracepoints in
addition to the syscalls:sys_enter_SYSCALL we hook using the
syscall_enter() helper.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-6qh8aph1jklyvdu7w89c0izc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/include/bpf/bpf.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
index 47897d65e799..52b6d87fe822 100644
--- a/tools/perf/include/bpf/bpf.h
+++ b/tools/perf/include/bpf/bpf.h
@@ -26,6 +26,9 @@ struct bpf_map {
 #define syscall_enter(name) \
 	SEC("syscalls:sys_enter_" #name) syscall_enter_ ## name
 
+#define syscall_exit(name) \
+	SEC("syscalls:sys_exit_" #name) syscall_exit_ ## name
+
 #define license(name) \
 char _license[] SEC("license") = #name; \
 int _version SEC("version") = LINUX_VERSION_CODE;