[PATCH v1 1/2] perf trace: Add tests for BTF general augmentation

[Howard Chu]

Currently, we only have perf trace augmentation tests for enum
arguments. This patch adds tests for more general syscall arguments,
such as struct pointers, strings, and buffers.

Signed-off-by: Howard Chu <howardchu95@xxxxxxxxx>
---
 tools/perf/tests/shell/trace_btf_general.sh | 68 +++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100755 tools/perf/tests/shell/trace_btf_general.sh

diff --git a/tools/perf/tests/shell/trace_btf_general.sh b/tools/perf/tests/shell/trace_btf_general.sh
new file mode 100755
index 000000000000..7bcca81a40d8
--- /dev/null
+++ b/tools/perf/tests/shell/trace_btf_general.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+# perf trace BTF general tests
+# SPDX-License-Identifier: GPL-2.0
+
+err=0
+set -e
+
+. "$(dirname $0)"/lib/probe.sh
+skip_if_no_perf_trace || exit 2
+
+file1=$(mktemp /tmp/file1_XXXXX)
+file2=$(echo $file1 | sed 's/file1/file2/g')
+
+buffer="the content of the buffer"
+
+trap cleanup EXIT TERM INT HUP
+
+trace_test_string() {
+  echo "Testing perf trace's string augmentation"
+  if ! perf trace -e renameat* --max-events=1 -- mv ${file1} ${file2} 2>&1 | grep -q -E " +[0-9]+\.[0-9]+ +\( *[0-9]+\.[0-9]+ ms\): +mv\/[0-9]+ renameat(2)?\(olddfd: .*, oldname: \"${file1}\", newdfd: .*, newname: \"${file2}\", flags: .*\) += +[0-9]+$"
+  then
+    echo "String augmentation test failed"
+    err=1
+  fi
+}
+
+trace_test_buffer() {
+  echo "Testing perf trace's buffer augmentation"
+  # echo will insert a newline (\10) at the end of the buffer
+  if ! perf trace -e write --max-events=1 -- echo "${buffer}" 2>&1 | grep -q -E " +[0-9]+\.[0-9]+ +\( *[0-9]+\.[0-9]+ ms\): +echo\/[0-9]+ write\(fd: [0-9]+, buf: ${buffer}.*, count: [0-9]+\) += +[0-9]+$"
+  then
+    echo "Buffer augmentation test failed"
+    err=1
+  fi
+}
+
+trace_test_struct_btf() {
+  echo "Testing perf trace's struct augmentation"
+  if ! perf trace -e clock_nanosleep --force-btf --max-events=1 -- sleep 1 2>&1 | grep -q -E " +[0-9]+\.[0-9]+ +\( *[0-9]+\.[0-9]+ ms\): +sleep\/[0-9]+ clock_nanosleep\(rqtp: \(struct __kernel_timespec\)\{\.tv_sec = \(__kernel_time64_t\)1,\}, rmtp: 0x[0-9a-f]+\) += +[0-9]+$"
+  then
+    echo "BTF struct augmentation test failed"
+    err=1
+  fi
+}
+
+cleanup() {
+	rm -rf ${file1} ${file2}
+}
+
+trap_cleanup() {
+	echo "Unexpected signal in ${FUNCNAME[1]}"
+	cleanup
+	exit 1
+}
+
+trace_test_string
+
+if [ $err = 0 ]; then
+  trace_test_buffer
+fi
+
+if [ $err = 0 ]; then
+  trace_test_struct_btf
+fi
+
+cleanup
+
+exit $err
-- 
2.43.0