libcxx: Unskip some condvar tests

[Arup-Chauhan]

Addressing the removal of lines mentioning condvar or condvarany in tests/libcxx/expected_results.txt. These tests were previously skipped due to reliance on timing assumptions, which have been resolved upstream.

No reference issue was raised for this PR to fix

Context: The skipped tests mentioned in the text file were dependent on timing assumptions. The upstream issue has been addressed and fixed in this LLVM commit.

Changes: Every line mentioning condvar or condvarany in tests/libcxx/expected_results.txt has been removed.
Rationale: The LLVM repository is used as a submodule. Once the problem is fixed in the submodule, we can unskip these tests, ensuring they run as intended.

Testing
Execution: Ran all the tests across all test suites to confirm the removal of condvar and condvarany entries.
Results: Tests were executed as expected, ensuring no adverse effects from the removal.

[frederick-vs-ja]

These 3 tests still failed since the elapsed time was less than the timeout.

• std/thread/thread.condition/thread.condition.condvarany/wait_for.pass.cpp
• std/thread/thread.condition/thread.condition.condvarany/wait_until.pass.cpp
• std/thread/thread.condition/thread.condition.condvarany/wait_until_pred.pass.cpp

Perhaps we should skip them again.

[Arup-Chauhan]

These 3 tests still failed since the elapsed time was less than the timeout.

• std/thread/thread.condition/thread.condition.condvarany/wait_for.pass.cpp
• std/thread/thread.condition/thread.condition.condvarany/wait_until.pass.cpp
• std/thread/thread.condition/thread.condition.condvarany/wait_until_pred.pass.cpp

Perhaps we should skip them again.

You want me to modify the test cases to skip these ones? maybe I can try doing that.

[StephanTLavavej]

Yeah, there are definitely remaining sporadic failures which will need to be re-skipped, thanks @frederick-vs-ja. From looking at the logs, I agree that those 3 are the ones that need to be re-skipped.

@Arup-Chauhan Please note that you can rerun just the affected test directories, which is way faster than a full test pass. (I do appreciate that you ran all of the tests at least once - that increases our confidence that the tests work on more than just maintainer and CI machines! 😻) On my local machine, the first time I ran these directories they passed, but the second time I got one of those tests to fail. Here's how I ran the affected directories and then inspected the logs:

Click to expand how I ran the tests:

D:\GitHub\STL\out\x64>python tests\utils\stl-lit\stl-lit.py -o testing_x64.log -Dnotags=ASAN --order=random ..\..\llvm-project\libcxx\test\std\thread\thread.condition\thread.condition.condvar ..\..\llvm-project\libcxx\test\std\thread\thread.condition\thread.condition.condvarany
-- Testing: 81 tests, 32 workers --
[...]
Testing Time: 18.14s

Total Discovered Tests: 81
  Skipped: 27 (33.33%)
  Passed : 54 (66.67%)

D:\GitHub\STL\out\x64>python tests\utils\stl-lit\stl-lit.py -o testing_x64.log -Dnotags=ASAN --order=random ..\..\llvm-project\libcxx\test\std\thread\thread.condition\thread.condition.condvar ..\..\llvm-project\libcxx\test\std\thread\thread.condition\thread.condition.condvarany
-- Testing: 81 tests, 32 workers --
[...]
********************
Failed Tests (1):
  libc++ :: std/thread/thread.condition/thread.condition.condvarany/wait_for.pass.cpp:0


Testing Time: 16.11s

Total Discovered Tests: 81
  Skipped: 27 (33.33%)
  Passed : 53 (65.43%)
  Failed :  1 (1.23%)

D:\GitHub\STL\out\x64>python ..\..\tools\scripts\print_failures.py testing_x64.log
code: FAIL
name: libc++ :: std/thread/thread.condition/thread.condition.condvarany/wait_for.pass.cpp:0
output: Build setup steps:
Build steps:
Command: "C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Tools\MSVC\14.41.33901\bin\HostX64\x64\cl.EXE" "D:\GitHub\STL\llvm-project\libcxx\test\std\thread\thread.condition\thread.condition.condvarany\wait_for.pass.cpp" "-ID:\GitHub\STL\out\x64\out\inc" "-ID:\GitHub\STL\llvm-project\libcxx\test\support" "-ID:\GitHub\STL\tests\std\include" "/nologo" "/Od" "/W4" "/w14061" "/w14242" "/w14265" "/w14582" "/w14583" "/w14587" "/w14588" "/w14749" "/w14841" "/w14842" "/w15038" "/w15214" "/w15215" "/w15216" "/w15217" "/w15262" "/sdl" "/WX" "/D_ENABLE_STL_INTERNAL_CHECK" "/bigobj" "/EHsc" "/MTd" "/std:c++latest" "/permissive-" "/utf-8" "/FImsvc_stdlib_force_include.h" "/FIvso1913897.hpp" "/wd4643" "/D_STL_CALL_ABORT_INSTEAD_OF_INVALID_PARAMETER" "/analyze:autolog-" "/Zc:preprocessor" "/wd6262" "-FeD:\GitHub\STL\out\x64\tests\libcxx\std\thread\thread.condition\thread.condition.condvarany\Output\wait_for.pass.cpp.dir\0\wait_for.pass.exe" "-link" "-LIBPATH:D:\GitHub\STL\out\x64\out\lib\amd64" "-LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Tools\MSVC\14.41.33901\lib\x64" "/MANIFEST:EMBED"
Exit Code: 0 (0x0)
Standard Output:
--
wait_for.pass.cpp
--

Intellisense response file steps:
Test setup steps:
Test steps:
Test step failed unexpectedly.
Command: "D:\GitHub\STL\out\x64\tests\libcxx\std\thread\thread.condition\thread.condition.condvarany\Output\wait_for.pass.cpp.dir\0\wait_for.pass.exe"
Exit Code: 3 (0x3)
Standard Error:
--
Assertion failed: elapsed >= timeout, file D:\GitHub\STL\llvm-project\libcxx\test\std\thread\thread.condition\thread.condition.condvarany\wait_for.pass.cpp, line 107
abort() has been called--


==================================================

[Arup-Chauhan]

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[StephanTLavavej]

Perfect, thanks! I expect to create a merge batch this week (after performing a Patch Tuesday toolset update tomorrow).

[Arup-Chauhan]

Perfect, thanks! I expect to create a merge batch this week (after performing a Patch Tuesday toolset update tomorrow).

Thanks! @StephanTLavavej , looking forward to more contributions!

[StephanTLavavej]

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

[Arup-Chauhan]

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

Sure, I feel for now we will be waiting for the LLVM or other condvar/condvarany issues raised here that are directly related to this.
Might need to link this PR to them if needed in future.

[StephanTLavavej]

Two more condvarany tests failed sporadically in the MSVC-internal repo (wait_for_pred.pass.cpp and notify_one.pass.cpp). Since we've realized that the STL is buggy, I re-skipped all condvarany tests (notify_all.pass.cpp is virtually certain to be affected too), moved them to the "STL BUGS" section, and cited #4723.

[Arup-Chauhan]

@StephanTLavavej is there any work to be done here? As in, are there any modifications to be done in the expectd_test_results.txt file, in order to get this PR to be merged?

Or will we wait to work on Issue #4723 first?

[StephanTLavavej]

Good question - the answer is that no action is needed, I've already updated the PR and will land it soon. This is part of the boring work that I take care of so contributors can have fun 😹

[Arup-Chauhan]

Just to mention @StephanTLavavej, thank you for making things easier for us!

Cheers to my first PR merge as well 😄

[StephanTLavavej]

Thanks for improving this test coverage, and congratulations on your second microsoft/STL commit! 🐈 🚀 😸