linux-kernel - [PATCH v2 1/2] perf script: print raw ip instead of binary offset for callchain

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Message-ID: <20230407055212.2701635-2-changbin.du@huawei.com>
Date:   Fri, 7 Apr 2023 13:52:11 +0800
From:   Changbin Du <changbin.du@...wei.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>
CC:     Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        <linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Hui Wang <hw.huiwang@...wei.com>,
        Changbin Du <changbin.du@...wei.com>
Subject: [PATCH v2 1/2] perf script: print raw ip instead of binary offset for callchain

Before this, the raw ip is printed for non-callchain and dso offset for
callchain. This inconsistent output for address may confuse people. And
mostly what we expect is the raw ip.

'dso offset' is printed in callchain:
$ perf script
...
ls 1341034 2739463.008343:    2162417 cycles:
        ffffffff99d657a7 [unknown] ([unknown])
        ffffffff99e00b67 [unknown] ([unknown])
                   235d3 memset+0x53 (/usr/lib/x86_64-linux-gnu/ld-2.31.so)  # dso offset
                    a61b _dl_map_object+0x1bb (/usr/lib/x86_64-linux-gnu/ld-2.31.so)

raw ip is printed for non-callchain:
$ perf script  -G
	...
        ls 1341034 2739463.008876:    2053304 cycles:  ffffffffc1596923 [unknown] ([unknown])
        ls 1341034 2739463.009381:    1917049 cycles:      14def8e149e6 __strcoll_l+0xd96 (/usr/lib/x86_64-linux-gnu/libc-2.31.so) # raw ip

Let's have consistent output for it. Later I'll add a new field 'dsoff' to
print dso offset.

Signed-off-by: Changbin Du <changbin.du@...wei.com>
---
 tools/perf/util/evsel_fprintf.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c
index bd22c4932d10..1fb8044d402e 100644
--- a/tools/perf/util/evsel_fprintf.c
+++ b/tools/perf/util/evsel_fprintf.c
@@ -153,13 +153,8 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
 			if (map)
 				addr = map->map_ip(map, node->ip);
 
-			if (print_ip) {
-				/* Show binary offset for userspace addr */
-				if (map && !map->dso->kernel)
-					printed += fprintf(fp, "%c%16" PRIx64, s, addr);
-				else
-					printed += fprintf(fp, "%c%16" PRIx64, s, node->ip);
-			}
+			if (print_ip)
+				printed += fprintf(fp, "%c%16" PRIx64, s, node->ip);
 
 			if (print_sym) {
 				printed += fprintf(fp, " ");
-- 
2.25.1