Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux

perf tests kallsyms: Add basic kallsyms test

Add test that kallsyms finds a well known symbol and fails for
another.

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

authored by

Ian Rogers and committed by
Namhyung Kim
526ed2f8 279385cf

+56
+56
tools/perf/tests/shell/kallsyms.sh
··· 1 + #!/bin/bash 2 + # perf kallsyms tests 3 + # SPDX-License-Identifier: GPL-2.0 4 + 5 + err=0 6 + 7 + test_kallsyms() { 8 + echo "Basic perf kallsyms test" 9 + 10 + # Check if /proc/kallsyms is readable 11 + if [ ! -r /proc/kallsyms ]; then 12 + echo "Basic perf kallsyms test [Skipped: /proc/kallsyms not readable]" 13 + err=2 14 + return 15 + fi 16 + 17 + # Use a symbol that is definitely a function and present in all kernels, e.g. schedule 18 + symbol="schedule" 19 + 20 + # Run perf kallsyms 21 + # It prints "address symbol_name" 22 + output=$(perf kallsyms $symbol 2>&1) 23 + ret=$? 24 + 25 + if [ $ret -ne 0 ] || [ -z "$output" ]; then 26 + # If empty or failed, it might be due to permissions (kptr_restrict) 27 + # Check if we can grep the symbol from /proc/kallsyms directly 28 + if grep -q "$symbol" /proc/kallsyms 2>/dev/null; then 29 + # If it's in /proc/kallsyms but perf kallsyms returned empty/error, 30 + # it likely means perf couldn't parse it or access it correctly (e.g. kptr_restrict=2). 31 + echo "Basic perf kallsyms test [Skipped: $symbol found in /proc/kallsyms but perf kallsyms failed (output: '$output')]" 32 + err=2 33 + return 34 + else 35 + echo "Basic perf kallsyms test [Skipped: $symbol not found in /proc/kallsyms]" 36 + err=2 37 + return 38 + fi 39 + fi 40 + 41 + if echo "$output" | grep -q "not found"; then 42 + echo "Basic perf kallsyms test [Failed: output '$output' does not contain $symbol]" 43 + err=1 44 + return 45 + fi 46 + 47 + if perf kallsyms ErlingHaaland | grep -vq "not found"; then 48 + echo "Basic perf kallsyms test [Failed: ErlingHaaland found in the output]" 49 + err=1 50 + return 51 + fi 52 + echo "Basic perf kallsyms test [Success]" 53 + } 54 + 55 + test_kallsyms 56 + exit $err