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perf tests: Add shell test for kernel symbol beautifier

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Add a dedicated shell test script, trace_ksym_beautifier.sh, to verify
that 'perf trace' properly symbolises kernel virtual addresses (e.g.
call_site in kmem:kmalloc) and function pointer fields (e.g. function in
timer:hrtimer_start) using the kernel symbol beautifier (SCA_KSYM).

Committer testing:

  root@number:~# perf test "kernel sym"
  145: perf trace kernel symbol beautifier tests                                                                 : Ok

  === Test Summary ===
  Passed main tests : 1
  Passed subtests   : 0
  Skipped tests     : 0
  Failed tests      : 0
  root@number:~# perf test -vv "kernel sym"
  145: perf trace kernel symbol beautifier tests:
  ---- start ----
  test child forked, pid 920749
  Testing perf trace kernel symbol beautifier (call_site)
  Testing perf trace kernel symbol beautifier (function pointer)
  ---- end(0) ----
  145: perf trace kernel symbol beautifier tests                                                                 : Ok

  === Test Summary ===
  Passed main tests : 1
  Passed subtests   : 0
  Skipped tests     : 0
  Failed tests      : 0
  root@number:~# perf test -vvv "kernel sym"
  145: perf trace kernel symbol beautifier tests:
  ---- start ----
  test child forked, pid 920784
  Testing perf trace kernel symbol beautifier (call_site)
  Testing perf trace kernel symbol beautifier (function pointer)
  ---- end(0) ----
  145: perf trace kernel symbol beautifier tests                                                                 : Ok

  === Test Summary ===
  Passed main tests : 1
  Passed subtests   : 0
  Skipped tests     : 0
  Failed tests      : 0
  root@number:~#

Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Aaron Tomlin 2026-08-24 09:31:22 -04:00 committed by Arnaldo Carvalho de Melo
parent c6dd616181
commit 35770d96fc
1 changed files with 38 additions and 0 deletions
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38
tools/perf/tests/shell/trace_ksym_beautifier.sh Executable file
View File

@ -0,0 +1,38 @@
#!/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_call_site() {
echo "Testing perf trace kernel symbol beautifier (call_site)"
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 "$output" | grep -q -E "call_site: 0x[0-9a-fA-F]+"
then
printf "Call site kernel symbol beautification failed, output:\n%s\n" "$output"
err=1
fi
}
test_ksym_function_ptr() {
echo "Testing perf trace kernel symbol beautifier (function pointer)"
output="$(perf trace -e timer:hrtimer_start --max-events=1 -- sleep 0.01 2>&1)"
if ! echo "$output" | grep -q -E "function: [a-zA-Z_][a-zA-Z0-9_]*" || echo "$output" | grep -q -E "function: 0x[0-9a-fA-F]+"
then
printf "Function pointer kernel symbol beautification failed, output:\n%s\n" "$output"
err=1
fi
}
test_ksym_call_site
if [ $err = 0 ]; then
test_ksym_function_ptr
fi
exit $err