From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Wed, 11 Sep 2024 20:10:33 +0000 (-0300)
Subject: perf trace: Mark the 'head' arg in the set_robust_list syscall as coming from user...
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=1de5b5dcb8353f36581c963df2d359a5f151a0be;p=users%2Fjedix%2Flinux-maple.git
perf trace: Mark the 'head' arg in the set_robust_list syscall as coming from user space
With that it uses the generic BTF based pretty printer:
This one we need to think about, not being acquainted with this syscall,
should we _traverse_ that list somehow? Would that be useful?
root@number:~# perf trace -e set_robust_list sleep 1
0.000 ( 0.004 ms): sleep/1206493 set_robust_list(head: (struct robust_list_head){.list = (struct robust_list){.next = (struct robust_list *)0x7f48a9a02a20,},.futex_offset = (long int)-32,}, len: 24) =
root@number:~#
strace prints the default integer args:
root@number:~# strace -e set_robust_list sleep 1
set_robust_list(0x7efd99559a20, 24) = 0
+++ exited with 0 +++
root@number:~#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alan Maguire <alan.maguire@oracle.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org
Link: https://lore.kernel.org/lkml/ZuH6MquMraBvODRp@x1
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 27084ae38bc4..f6e847529073 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1351,6 +1351,8 @@ static const struct syscall_fmt syscall_fmts[] = {
{ .name = "sendto",
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
[4] = SCA_SOCKADDR_FROM_USER(addr), }, },
+ { .name = "set_robust_list", .errpid = true,
+ .arg = { [0] = { .from_user = true /* head */, }, }, },
{ .name = "set_tid_address", .errpid = true, },
{ .name = "setitimer",
.arg = { [0] = STRARRAY(which, itimers), }, },