From: tip-bot for Arnaldo Carvalho de Melo <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: jolsa@kernel.org, dsahern@gmail.com, acme@redhat.com,
mingo@kernel.org, namhyung@kernel.org, tglx@linutronix.de,
wangnan0@huawei.com, adrian.hunter@intel.com, hpa@zytor.com,
linux-kernel@vger.kernel.org
Subject: [tip:perf/core] perf trace beauty mmap: Ignore 'fd' and 'offset' args for MAP_ANONYMOUS
Date: Wed, 26 Jul 2017 10:14:15 -0700 [thread overview]
Message-ID: <tip-atpt07y2x9a8ttlwja94ow3j@git.kernel.org> (raw)
Commit-ID: d57da8c9a5e11e7786931cfa1fd744969f530b2e
Gitweb: http://git.kernel.org/tip/d57da8c9a5e11e7786931cfa1fd744969f530b2e
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Wed, 19 Jul 2017 12:16:15 -0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 20 Jul 2017 09:55:51 -0300
perf trace beauty mmap: Ignore 'fd' and 'offset' args for MAP_ANONYMOUS
Just suppress them, not used by the kernel.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-atpt07y2x9a8ttlwja94ow3j@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/trace/beauty/mmap.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/trace/beauty/mmap.c b/tools/perf/trace/beauty/mmap.c
index af1cfde..754558f 100644
--- a/tools/perf/trace/beauty/mmap.c
+++ b/tools/perf/trace/beauty/mmap.c
@@ -34,6 +34,9 @@ static size_t syscall_arg__scnprintf_mmap_flags(char *bf, size_t size,
{
int printed = 0, flags = arg->val;
+ if (flags & MAP_ANONYMOUS)
+ arg->mask |= (1 << 4) | (1 << 5); /* Mask 4th ('fd') and 5th ('offset') args, ignored */
+
#define P_MMAP_FLAG(n) \
if (flags & MAP_##n) { \
printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
reply other threads:[~2017-07-26 17:16 UTC|newest]
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