[PATCH perf-tools-next v5 4/4] perf tests: Add shell test for kernel symbol beautifier

[Aaron Tomlin]

Add a dedicated shell test script, trace_ksym_beautifier.sh, to verify
that 'perf trace' properly symbolises kernel virtual addresses and
function pointers using both the default kallsyms beautifier (SCA_KSYM)
and BTF type routing i.e., --force-btf.

Signed-off-by: Aaron Tomlin <atomlin@xxxxxxxxxxx>
---
 .../perf/tests/shell/trace_ksym_beautifier.sh | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100755 tools/perf/tests/shell/trace_ksym_beautifier.sh

diff --git a/tools/perf/tests/shell/trace_ksym_beautifier.sh b/tools/perf/tests/shell/trace_ksym_beautifier.sh
new file mode 100755
index 000000000000..45c803338d4c
--- /dev/null
+++ b/tools/perf/tests/shell/trace_ksym_beautifier.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# perf trace kernel symbol beautifier tests
+# SPDX-License-Identifier: GPL-2.0
+
+err=0
+
+# shellcheck source=lib/probe.sh
+. "$(dirname "$0")"/lib/probe.sh
+skip_if_no_perf_trace || exit 2
+[ "$(id -u)" = 0 ] || exit 2
+
+test_ksym_kallsyms() {
+  echo "Testing perf trace kernel symbol beautifier (default kallsyms)"
+  output="$(perf trace -e kmem:kmalloc --max-events=1 -- true 2>&1)"
+  if ! echo "$output" | grep -q -E "call_site: [a-zA-Z_][a-zA-Z0-9_]*" || echo "$output" | grep -q -E "call_site: 0x[0-9a-fA-F]+"
+  then
+    printf "Default kallsyms function symbolization failed, output:\n%s\n" "$output"
+    err=1
+  fi
+}
+
+test_ksym_btf() {
+  echo "Testing perf trace kernel symbol beautifier (BTF)"
+  if [ ! -f /sys/kernel/btf/vmlinux ]; then
+    echo "Skipping BTF test due to missing vmlinux BTF"
+    return
+  fi
+
+  output="$(perf trace -e timer:hrtimer_start --force-btf --max-events=1 -- sleep 0.01 2>&1)"
+  if ! echo "$output" | grep -q -E "function: [a-zA-Z_][a-zA-Z0-9_]*" || echo "$output" | grep -q -E "function: 0x[0-9a-fA-F]+"
+  then
+    printf "BTF function symbolization failed, output:\n%s\n" "$output"
+    err=1
+  fi
+}
+
+test_ksym_kallsyms
+
+if [ $err = 0 ]; then
+  test_ksym_btf
+fi
+
+exit $err
-- 
2.55.0