linux-kernel - [PATCH v1] perf trace: Disable syscall augmentation with record

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Date: Fri, 16 Feb 2024 09:23:57 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1] perf trace: Disable syscall augmentation with record

Syscall augmentation is causing samples not to be written to the
perf.data file with "perf trace record". Disabling augmentation is
sub-optimal, but it beats having a totally broken perf trace record.

Closes: https://lore.kernel.org/lkml/CAP-5=fV9Gd1Teak+EOcUSxe13KqSyfZyPNagK97GbLiOQRgGaw@mail.gmail.com/
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/builtin-trace.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 109b8e64fe69..192721261098 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -4864,6 +4864,11 @@ int cmd_trace(int argc, const char **argv)
 	if (!trace.trace_syscalls)
 		goto skip_augmentation;
 
+	if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) {
+		pr_debug("Syscall augmentation fails with record, disabling augmentation");
+		goto skip_augmentation;
+	}
+
 	trace.skel = augmented_raw_syscalls_bpf__open();
 	if (!trace.skel) {
 		pr_debug("Failed to open augmented syscalls BPF skeleton");
-- 
2.44.0.rc0.258.g7320e95886-goog