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From:   Alexandre Truong <alexandre.truong@arm.com>
To:     linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Cc:     Alexandre Truong <alexandre.truong@arm.com>
Subject: [PATCH v2 3/4] perf tools: enable dwarf_callchain_users on aarch64
Date:   Fri, 12 Feb 2021 17:03:42 +0000
Message-Id: <20210212170343.7729-3-alexandre.truong@arm.com>
In-Reply-To: <20210212170343.7729-1-alexandre.truong@arm.com>
References: <20210212170343.7729-1-alexandre.truong@arm.com>
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On arm64, enable dwarf_callchain_users which will be needed
to do a dwarf unwind in order to get the caller of the leaf frame.

Signed-off-by: Alexandre Truong <alexandre.truong@arm.com>
---
 tools/perf/builtin-report.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 2a845d6cac09..93661a3eaeb1 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -405,6 +405,10 @@ static int report__setup_sample_type(struct report *rep)
 
 	callchain_param_setup(sample_type);
 
+	if (callchain_param.record_mode == CALLCHAIN_FP &&
+			strncmp(rep->session->header.env.arch, "aarch64", 7) == 0)
+		dwarf_callchain_users = true;
+
 	if (rep->stitch_lbr && (callchain_param.record_mode != CALLCHAIN_LBR)) {
 		ui__warning("Can't find LBR callchain. Switch off --stitch-lbr.\n"
 			    "Please apply --call-graph lbr when recording.\n");
-- 
2.23.0