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IDProjectCategoryView StatusDate SubmittedLast Update
0014015CMakeCMakepublic2013-03-15 07:232013-03-16 04:05
ReporterSylwester Arabas 
Assigned ToEric NOULARD 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionwon't fix 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0014015: execute_process() causing CMake to abort suddenly
DescriptionHello, here's an example causing CMake to abort suddenly without printing any useful information.

HTH,
Sylwester
Steps To Reproduce$ cat CMakeLists.txt
execute_process(COMMAND perf stat -oo /dev/null w)
message("HERE")

$ cmake .
-- The C compiler identification is GNU 4.7.2
-- The CXX compiler identification is GNU 4.7.2
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
/dev/null: Permission denied
Terminated
TagsNo tags attached.
Attached Files? file icon test_execute_process_abort.cmake [^] (216 bytes) 2013-03-15 07:52

 Relationships

  Notes
(0032636)
Eric NOULARD (developer)
2013-03-15 08:08

 I guess the culprit is not cmake but the perf command itself.
Try the following command line:

$ perf stat -oo /dev/null

and see what happen you'll see that perf is terminating abruptely.

If you

$ strace -f perf stat -oo /dev/null w

at the end you'll see:
[pid xxxx] kill(0, SIGTERM <unfinished ...>

which basically sends SIFTERM to **all** processes of the process group,
thus killing CMake itself.

I think there is nothing CMake can do about it however the trouble
comes from the typo:

perf stat -oo /dev/null w

which means from the 'perf' command point of view that you are trying
to collect stats for the command "/dev/null" (and put stats inside 'o' file)
if you try:

perf stat -o /dev/null w


you'll see that it works as expected.

I put the bug in feedback status but I guess it should go to won't fix.
(0032637)
Eric NOULARD (developer)
2013-03-15 08:08

 Waiting for feedback before switching and closing.
(0032643)
Sylwester Arabas (reporter)
2013-03-15 13:33

 The typo was intentional - it triggers this behaviour. Do you consider it worth reporting to perf maintainers? Killing the parent process seems quite surprising to me.

Thanks,
Sylwester
(0032644)
Eric NOULARD (developer)
2013-03-15 17:21

 I think it's worth asking, at least, because killing
the process group looks like overkill.
(0032645)
Sylwester Arabas (reporter)
2013-03-15 18:52

 I've just asked if this behaviour is intentional on the linux-perf-users mailing list. I guess the issue is closed as it has nothing to do with CMake - sorry. Thanks for checking it.
Sylwester
(0032646)
Eric NOULARD (developer)
2013-03-16 04:05

 This is not a CMake issue.

 Issue History
Date Modified Username Field Change
2013-03-15 07:23 Sylwester Arabas New Issue
2013-03-15 07:51 Eric NOULARD Assigned To => Eric NOULARD
2013-03-15 07:51 Eric NOULARD Status new => assigned
2013-03-15 07:52 Eric NOULARD File Added: test_execute_process_abort.cmake
2013-03-15 08:08 Eric NOULARD Note Added: 0032636
2013-03-15 08:08 Eric NOULARD Note Added: 0032637
2013-03-15 08:08 Eric NOULARD Status assigned => feedback
2013-03-15 13:33 Sylwester Arabas Note Added: 0032643
2013-03-15 13:33 Sylwester Arabas Status feedback => assigned
2013-03-15 17:21 Eric NOULARD Note Added: 0032644
2013-03-15 18:52 Sylwester Arabas Note Added: 0032645
2013-03-16 04:05 Eric NOULARD Note Added: 0032646
2013-03-16 04:05 Eric NOULARD Status assigned => closed
2013-03-16 04:05 Eric NOULARD Resolution open => won't fix

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