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perf testsuite probe: Add test for blacklisted kprobes handling

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Test perf probe interface. Blacklisted functions should be rejected
when there is an attempt to set a kprobe to them.

Signed-off-by: Veronika Molnarova <vmolnaro@redhat.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240702110849.31904-6-vmolnaro@redhat.com
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Veronika Molnarova 2024-07-02 13:08:43 +02:00 committed by Arnaldo Carvalho de Melo
parent 32ddd082dc
commit def5480d63
1 changed files with 67 additions and 0 deletions
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67
tools/perf/tests/shell/base_probe/test_adding_blacklisted.sh Executable file
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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# test_adding_blacklisted of perf_probe test
# Author: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
# Author: Michael Petlan <mpetlan@redhat.com>
#
# Description:
#
# Blacklisted functions should not be added successfully as probes,
# they must be skipped.
#
# include working environment
. ../common/init.sh
TEST_RESULT=0
# skip if not supported
BLACKFUNC=`head -n 1 /sys/kernel/debug/kprobes/blacklist 2> /dev/null | cut -f2`
if [ -z "$BLACKFUNC" ]; then
print_overall_skipped
exit 0
fi
# remove all previously added probes
clear_all_probes
### adding blacklisted function
# functions from blacklist should be skipped by perf probe
! $CMD_PERF probe $BLACKFUNC > $LOGS_DIR/adding_blacklisted.log 2> $LOGS_DIR/adding_blacklisted.err
PERF_EXIT_CODE=$?
REGEX_SCOPE_FAIL="Failed to find scope of probe point"
REGEX_SKIP_MESSAGE=" is blacklisted function, skip it\."
REGEX_NOT_FOUND_MESSAGE="Probe point \'$BLACKFUNC\' not found."
REGEX_ERROR_MESSAGE="Error: Failed to add events."
REGEX_INVALID_ARGUMENT="Failed to write event: Invalid argument"
REGEX_SYMBOL_FAIL="Failed to find symbol at $RE_ADDRESS"
REGEX_OUT_SECTION="$BLACKFUNC is out of \.\w+, skip it"
../common/check_all_lines_matched.pl "$REGEX_SKIP_MESSAGE" "$REGEX_NOT_FOUND_MESSAGE" "$REGEX_ERROR_MESSAGE" "$REGEX_SCOPE_FAIL" "$REGEX_INVALID_ARGUMENT" "$REGEX_SYMBOL_FAIL" "$REGEX_OUT_SECTION" < $LOGS_DIR/adding_blacklisted.err
CHECK_EXIT_CODE=$?
print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "adding blacklisted function $BLACKFUNC"
(( TEST_RESULT += $? ))
### listing not-added probe
# blacklisted probes should NOT appear in perf-list output
$CMD_PERF list probe:\* > $LOGS_DIR/adding_blacklisted_list.log
PERF_EXIT_CODE=$?
../common/check_all_lines_matched.pl "$RE_LINE_EMPTY" "List of pre-defined events" "Metric Groups:" < $LOGS_DIR/adding_blacklisted_list.log
CHECK_EXIT_CODE=$?
print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "listing blacklisted probe (should NOT be listed)"
(( TEST_RESULT += $? ))
# print overall results
print_overall_results "$TEST_RESULT"
exit $?