> On 17 Mar 2026, at 9:34 PM, Ian Rogers <[email protected]> wrote:
>
> On Sat, Mar 14, 2026 at 1:37 AM Athira Rajeev <[email protected]> wrote:
>>
>> Perf test perftool-testsuite_probe fails as below:
>>
>> Regexp not found: "\s*probe:inode_permission(?:_\d+)?\s+\(on
>> inode_permission(?:[:\+][0-9A-Fa-f]+)?@.+\)"
>> -- [ FAIL ] -- perf_probe :: test_adding_kernel :: listing added probe ::
>> perf probe -l (output regexp parsing)
>> -- [ PASS ] -- perf_probe :: test_adding_kernel :: removing multiple probes
>> Regexp not found: "probe:vfs_mknod"
>> Regexp not found: "probe:vfs_create"
>> Regexp not found: "probe:vfs_rmdir"
>> Regexp not found: "probe:vfs_link"
>> Regexp not found: "probe:vfs_write"
>> -- [ FAIL ] -- perf_probe :: test_adding_kernel :: wildcard adding support
>> (command exitcode + output regexp parsing)
>> Regexp not found:
>> "somenonexistingrandomstuffwhichisalsoprettylongorevenlongertoexceed64"
>> Regexp not found: "in this function|at this address"
>> -- [ FAIL ] -- perf_probe :: test_adding_kernel :: non-existing variable
>> (output regexp parsing)
>> ## [ FAIL ] ## perf_probe :: test_adding_kernel SUMMARY :: 3 failures found
>>
>> Further analysing, the failed testcase is for "test_adding_kernel".
>> If the kernel debuginfo is missing, perf probe fails as below:
>>
>> perf probe -nf --max-probes=512 -a 'vfs_* $params'
>> Failed to find the path for the kernel: No such file or directory
>> Error: Failed to add events.
>>
>> skip_if_no_debuginfo has check to handle whether debuginfo is present
>> and the testcase checks for debuginfo since this :
>> commit 90d32e92011e ("tools/perf: Handle perftool-testsuite_probe
>> testcases fail when kernel debuginfo is not present")
>>
>> Recently a change got added in "tests/shell/lib/probe_vfs_getname.sh"
>> via this another fix:
>> commit 92b664dcefab ("perf test probe_vfs_getname: Skip if no suitable
>> line detected")
>> Since this commit, first add_probe_vfs_getname is used to prevent false
>> failures. And based on return code of add_probe_vfs_getname,
>> skip_if_no_debuginfo
>> is used to skip testcase if debuginfo is present. And this modified other
>> testcases to call add_probe_vfs_getname first and invoke
>> skip_if_no_debuginfo based on return value.
>>
>> The tests in test_adding_kernel.sh which depends on presence of
>> debuginfo are:
>> 1. probe add for inode_permission
>> 2. probe max-probes option using 'vfs_* $params'
>> 3. non-existing variable probing
>>
>> For these tests, probe check for specific line is not required.
>> So call skip_if_no_debuginfo with argument to say if line check is
>> needed. This is to convey to skip_if_no_debuginfo() function
>> that test only needs to check for debuginfo, and not specifically
>> line number. Update skip_if_no_debuginfo to use simple "perf probe"
>> check if test only needs to check for debuginfo. And for other
>> tests which rely on line number, use add_probe_vfs_getname()
>>
>> With the change, verified that only three which required debuginfo only
>> is skipped and others ran successfully. Also tested with debuginfo
>> to make sure tests are not skipped.
>>
>> Reported-by: Tejas Manhas <[email protected]>
>> Signed-off-by: Athira Rajeev <[email protected]>
>
> Thanks for taking the time to improve the test pass rate! I'm sure you
> saw Venkat's comments, but for the change itself:
>
> Reviewed-by: Ian Rogers <[email protected]>
>
> Thanks,
> Ian
Thanks Ian for the review.
Sure, I will address Venkat’s comments along with your Reviewed-by in V2
Thanks
Athira
>
>> ---
>> .../tests/shell/base_probe/test_adding_kernel.sh | 15 ++++++++++++++-
>> tools/perf/tests/shell/lib/probe_vfs_getname.sh | 13 ++++++++++++-
>> 2 files changed, 26 insertions(+), 2 deletions(-)
>>
>> diff --git a/tools/perf/tests/shell/base_probe/test_adding_kernel.sh
>> b/tools/perf/tests/shell/base_probe/test_adding_kernel.sh
>> index 555a825d55f2..f3db125c8669 100755
>> --- a/tools/perf/tests/shell/base_probe/test_adding_kernel.sh
>> +++ b/tools/perf/tests/shell/base_probe/test_adding_kernel.sh
>> @@ -23,10 +23,23 @@ TEST_RESULT=0
>> . "$DIR_PATH/../lib/probe_vfs_getname.sh"
>>
>> TEST_PROBE=${TEST_PROBE:-"inode_permission"}
>> +PROBE_NO_LINE_CHECK=1
>>
>> # set NO_DEBUGINFO to skip testcase if debuginfo is not present
>> # skip_if_no_debuginfo returns 2 if debuginfo is not present
>> -skip_if_no_debuginfo
>> +#
>> +# The perf probe checks which depends on presence of debuginfo and
>> +# used in this testcase are:
>> +# 1. probe add for inode_permission
>> +# 2. probe max-probes option using 'vfs_* $params'
>> +# 3. non-existing variable probing
>> +#
>> +# For these tests, probe check for specific line is not
>> +# required ( add_probe_vfs_getname does that ). So call
>> +# skip_if_no_debuginfo with argument as 1. This is to convey
>> +# that test only needs to check for debuginfo, and not specifically
>> +# line number
>> +skip_if_no_debuginfo $PROBE_NO_LINE_CHECK
>> if [ $? -eq 2 ]; then
>> NO_DEBUGINFO=1
>> fi
>> diff --git a/tools/perf/tests/shell/lib/probe_vfs_getname.sh
>> b/tools/perf/tests/shell/lib/probe_vfs_getname.sh
>> index 88cd0e26d5f6..8584ec76f041 100644
>> --- a/tools/perf/tests/shell/lib/probe_vfs_getname.sh
>> +++ b/tools/perf/tests/shell/lib/probe_vfs_getname.sh
>> @@ -39,7 +39,18 @@ add_probe_vfs_getname() {
>> }
>>
>> skip_if_no_debuginfo() {
>> - add_probe_vfs_getname -v 2>&1 | grep -E -q "^(Failed to find the
>> path for the kernel|Debuginfo-analysis is not supported)|(file has no debug
>> information)" && return 2
>> + no_line_check=$1
>> + debug_str="^(Failed to find the path for the
>> kernel|Debuginfo-analysis is not supported)|(file has no debug information)"
>> +
>> + # search for debug_str using simple perf probe if the
>> + # test only needs to check for debuginfo, and not specifically
>> + # line number.
>> + if [ $no_line_check -eq 1 ]; then
>> + perf probe -v -L getname_flags 2>&1 | grep -E -q
>> "$debug_str" && return 2
>> + else
>> + add_probe_vfs_getname -v 2>&1 | grep -E -q "$debug_str" &&
>> return 2
>> + fi
>> +
>> return 1
>> }
>>
>> --
>> 2.47.3
