linux-kernel - [PATCH 7/8] perf tools: Print ptrauth struct in perf report

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Message-Id: <20220704145333.22557-8-andrew.kilroy@arm.com>
Date:   Mon,  4 Jul 2022 15:53:31 +0100
From:   Andrew Kilroy <andrew.kilroy@....com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org
Cc:     Andrew Kilroy <andrew.kilroy@....com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Tom Rix <trix@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH 7/8] perf tools: Print ptrauth struct in perf report

This patch prints a perf sample's ptrauth struct so that the PAC masks
can be seen.  To aid debugging.

Signed-off-by: Andrew Kilroy <andrew.kilroy@....com>
---
 tools/perf/util/session.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 37f833c3c81b..6b56e638d4dd 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1329,6 +1329,13 @@ char *get_page_size_name(u64 size, char *str)
 	return str;
 }
 
+static void ptrauth__printf(struct ptrauth_info *ptrauth)
+{
+	printf(" . ptrauth enabled keys:     0x%016"PRIx64"\n", ptrauth->enabled_keys);
+	printf(" . ptrauth instruction mask: 0x%016"PRIx64"\n", ptrauth->insn_mask);
+	printf(" . ptrauth data mask:        0x%016"PRIx64"\n", ptrauth->data_mask);
+}
+
 static void dump_sample(struct evsel *evsel, union perf_event *event,
 			struct perf_sample *sample, const char *arch)
 {
@@ -1385,6 +1392,14 @@ static void dump_sample(struct evsel *evsel, union perf_event *event,
 
 	if (sample_type & PERF_SAMPLE_READ)
 		sample_read__printf(sample, evsel->core.attr.read_format);
+
+	if (sample_type & PERF_SAMPLE_ARCH_1) {
+		const char *normlzd_arch = perf_env__arch(evsel->evlist->env);
+
+		if (normlzd_arch && strcmp(normlzd_arch, "arm64") == 0)
+			ptrauth__printf(&sample->ptrauth);
+	}
+
 }
 
 static void dump_read(struct evsel *evsel, union perf_event *event)
-- 
2.17.1