On system which has not installed debuginfo of iputils(ping) will fail like:
~/lkp/linux/tools/perf$ sudo ./perf test ping -v
63: probe libc's inet_pton & backtrace it with ping :
--- start ---
test child forked, pid 4207
ping 4224 [007] 3034121.295510: probe_libc:inet_pton: (7fedfccb2200)
7fedfccb2200 __GI___inet_pton+0x0 (/lib/x86_64-linux-gnu/libc-2.23.so)
7fedfcc7ad5e getaddrinfo+0xee (/lib/x86_64-linux-gnu/libc-2.23.so)
55e3239a9f4d [unknown] (/bin/ping)
FAIL: expected backtrace entry 3
".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" got "55e3239a9f4d [unknown] (/bin/ping)"
test child finished with -1
---- end ----
probe libc's inet_pton & backtrace it with ping: FAILED!
To be compatible with this system, expects [unknown] as well
Fixes: 7903a7086723 ("perf script: Show symbol offsets by default")
CC: Sandipan Das <[email protected]>
CC: Thomas Richter <[email protected]>
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Li Zhijian <[email protected]>
---
tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
index 2630570..ebb6549 100755
--- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
@@ -22,12 +22,12 @@ trace_libc_inet_pton_backtrace() {
eventattr='call-graph=dwarf,max-stack=4'
expected[2]="gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
expected[3]="(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
- expected[4]="main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
+ expected[4]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
;;
*)
eventattr='max-stack=3'
expected[2]="getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$"
- expected[3]=".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
+ expected[3]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
;;
esac
--
2.7.4
Em Thu, Jun 28, 2018 at 03:16:00PM +0800, Li Zhijian escreveu:
> On system which has not installed debuginfo of iputils(ping) will fail like:
> ~/lkp/linux/tools/perf$ sudo ./perf test ping -v
I think that we should try to check if the required debuginfo package is
installed and if so, expect the symbol resolution that takes place in
that case. Other wise expect [unknown], this way we don't leave this
test accepting almost anything in any case.
- Arnaldo
> 63: probe libc's inet_pton & backtrace it with ping :
> --- start ---
> test child forked, pid 4207
> ping 4224 [007] 3034121.295510: probe_libc:inet_pton: (7fedfccb2200)
> 7fedfccb2200 __GI___inet_pton+0x0 (/lib/x86_64-linux-gnu/libc-2.23.so)
> 7fedfcc7ad5e getaddrinfo+0xee (/lib/x86_64-linux-gnu/libc-2.23.so)
> 55e3239a9f4d [unknown] (/bin/ping)
> FAIL: expected backtrace entry 3
> ".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" got "55e3239a9f4d [unknown] (/bin/ping)"
> test child finished with -1
> ---- end ----
> probe libc's inet_pton & backtrace it with ping: FAILED!
>
> To be compatible with this system, expects [unknown] as well
>
> Fixes: 7903a7086723 ("perf script: Show symbol offsets by default")
> CC: Sandipan Das <[email protected]>
> CC: Thomas Richter <[email protected]>
> Reported-by: kernel test robot <[email protected]>
> Signed-off-by: Li Zhijian <[email protected]>
> ---
> tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
> index 2630570..ebb6549 100755
> --- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
> +++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
> @@ -22,12 +22,12 @@ trace_libc_inet_pton_backtrace() {
> eventattr='call-graph=dwarf,max-stack=4'
> expected[2]="gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> expected[3]="(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> - expected[4]="main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
> + expected[4]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
> ;;
> *)
> eventattr='max-stack=3'
> expected[2]="getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$"
> - expected[3]=".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
> + expected[3]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
> ;;
> esac
>
> --
> 2.7.4
On 06/29/2018 11:17 PM, Arnaldo Carvalho de Melo wrote:
> Em Thu, Jun 28, 2018 at 03:16:00PM +0800, Li Zhijian escreveu:
>> On system which has not installed debuginfo of iputils(ping) will fail like:
>> ~/lkp/linux/tools/perf$ sudo ./perf test ping -v
> I think that we should try to check if the required debuginfo package is
> installed and if so, expect the symbol resolution that takes place in
> that case. Other wise expect [unknown], this way we don't leave this
> test accepting almost anything in any case.
Looks ping binary in different distros include different symbol.
without this patch, ubuntu 16.04 is good and debian 9 is bad when they both have not installed debuginfo for ping.
and then after i installed debuginfo for ping(iputils-ping-dbgsym), test become passed as well on debian 9
Debian 9
bofore installing debuginfo, it includes [unknown]
root@vm-lkp-nex04-8G-10 /usr/src/linux-perf-x86_64-randconfig-w0-06061439-fb43d6cb91ef57d9e58d5f69b423784ff4a4c374/tools/perf# ./perf test ping -v
62: probe libc's inet_pton & backtrace it with ping :
--- start ---
test child forked, pid 6324
ping 6341 [000] 4470.361330: probe_libc:inet_pton: (7f9f3900eaa0)
105aa0 inet_pton (/lib/x86_64-linux-gnu/libc-2.24.so)
d52f8 getaddrinfo (/lib/x86_64-linux-gnu/libc-2.24.so)
3ebe [unknown] (/bin/ping)
test child finished with 0
------------------------------
after install debuginfo
root@vm-lkp-nex04-8G-10 /usr/src/linux-perf-x86_64-randconfig-w0-06061439-fb43d6cb91ef57d9e58d5f69b423784ff4a4c374/tools/perf# ./perf test ping -v
62: probe libc's inet_pton & backtrace it with ping :
--- start ---
test child forked, pid 6387
ping 6404 [000] 4488.855086: probe_libc:inet_pton: (7fb5bcc7caa0)
105aa0 inet_pton (/lib/x86_64-linux-gnu/libc-2.24.so)
d52f8 getaddrinfo (/lib/x86_64-linux-gnu/libc-2.24.so)
3ebe main (/bin/ping)
test child finished with 0
Thanks
>
> - Arnaldo
>
>> 63: probe libc's inet_pton & backtrace it with ping :
>> --- start ---
>> test child forked, pid 4207
>> ping 4224 [007] 3034121.295510: probe_libc:inet_pton: (7fedfccb2200)
>> 7fedfccb2200 __GI___inet_pton+0x0 (/lib/x86_64-linux-gnu/libc-2.23.so)
>> 7fedfcc7ad5e getaddrinfo+0xee (/lib/x86_64-linux-gnu/libc-2.23.so)
>> 55e3239a9f4d [unknown] (/bin/ping)
>> FAIL: expected backtrace entry 3
>> ".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" got "55e3239a9f4d [unknown] (/bin/ping)"
>> test child finished with -1
>> ---- end ----
>> probe libc's inet_pton & backtrace it with ping: FAILED!
>>
>> To be compatible with this system, expects [unknown] as well
>>
>> Fixes: 7903a7086723 ("perf script: Show symbol offsets by default")
>> CC: Sandipan Das <[email protected]>
>> CC: Thomas Richter <[email protected]>
>> Reported-by: kernel test robot <[email protected]>
>> Signed-off-by: Li Zhijian <[email protected]>
>> ---
>> tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
>> index 2630570..ebb6549 100755
>> --- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
>> +++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
>> @@ -22,12 +22,12 @@ trace_libc_inet_pton_backtrace() {
>> eventattr='call-graph=dwarf,max-stack=4'
>> expected[2]="gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
>> expected[3]="(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
>> - expected[4]="main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
>> + expected[4]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
>> ;;
>> *)
>> eventattr='max-stack=3'
>> expected[2]="getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$"
>> - expected[3]=".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
>> + expected[3]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
>> ;;
>> esac
>>
>> --
>> 2.7.4
>
> .
>
--
Best regards.
Li Zhijian (8528)