testsuite occationally deadlocks #226
Description
When building alpine 3.22 we have observed deadlocks when running ctest. This has been seen on multiple architectures, riscv64, x86_64, ppc64le.
I was able to reproduce it on my desktop i9:
[56/68] Creating library symlink libks2.so [57/68] Linking C executable tests/testjson [58/68] Linking C executable tests/testlog [59/68] Linking C executable tests/teststring [60/68] Linking C executable tests/testwebsock2 [61/68] Linking C executable tests/testwebsock [62/68] Linking C executable tests/testsock2 [63/68] Linking C executable tests/testsock [64/68] Linking C executable tests/testhash [65/68] Linking C executable tests/testthreadpools [66/68] Linking C executable tests/testacl [67/68] Linking C executable tests/testrealloc [68/68] Linking C executable tests/testpools Test project /home/ncopa/aports/main/libks/src/libks-2.0.6 Start 1: testpools Start 2: testrealloc Start 3: testacl Start 4: testthreadpools Start 5: testhash Start 6: testsock Start 7: testsock2 Start 8: testwebsock Start 9: testwebsock2 Start 10: teststring Start 11: testlog Start 12: testjson 1/12 Test #1: testpools ........................ Passed 0.01 sec 2/12 Test #2: testrealloc ...................... Passed 0.01 sec 3/12 Test #3: testacl .......................... Passed 0.01 sec 4/12 Test #7: testsock2 ........................ Passed 0.00 sec 5/12 Test #10: teststring ....................... Passed 0.00 sec 6/12 Test #12: testjson ......................... Passed 0.00 sec 7/12 Test #9: testwebsock2 ..................... Passed 0.02 sec 8/12 Test #8: testwebsock ...................... Passed 0.12 sec 9/12 Test #6: testsock ......................... Passed 2.04 sec 10/12 Test #4: testthreadpools .................. Passed 5.01 sec 11/12 Test #5: testhash ......................... Passed 9.01 sec And there it hangs.
It appears to be the test #11 that deadlocks, testlog.
I have no idea how to debug it.