Test for GTK4 crashes when creating and closing many shells

[jonahgraham]

While trying to test the clipboard (#2126) on a loop I found GTK4 crashed quite consistently, so I extracted the minimum test that fails to see if this problem is my machine only.

This is what happens when I run it from my Eclipse dev:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x0000732c1d859313, pid=466736, tid=466743
#
# JRE version: OpenJDK Runtime Environment Temurin-21.0.5+11 (21.0.5+11) (build 21.0.5+11-LTS)
# Java VM: OpenJDK 64-Bit Server VM Temurin-21.0.5+11 (21.0.5+11-LTS, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# C  [libgtk-4.so.1+0x659313]
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -F%F -- %E" (or dumping to /scratch/eclipse/oomph/swt-master/git/eclipse.platform.swt/tests/org.eclipse.swt.tests/core.466736)
#
# An error report file with more information is saved as:
# /scratch/eclipse/oomph/swt-master/git/eclipse.platform.swt/tests/org.eclipse.swt.tests/hs_err_pid466736.log
[5.351s][warning][os] Loading hsdis library failed
#
# If you would like to submit a bug report, please visit:
#   https://github.com/adoptium/adoptium-support/issues
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.

hs_err_pid466736.log

[github-actions]

Test Results

   88 files   -  30     88 suites   - 30   9m 7s ⏱️ - 1m 41s
5 546 tests +963  5 512 ✅ +965  34 💤  - 2  0 ❌ ±0 
  261 runs   -  69    239 ✅  -  68  22 💤  - 1  0 ❌ ±0 

Results for commit 92a674d. ± Comparison against base commit 12ac449.

This pull request removes 37 and adds 1000 tests. Note that renamed tests count towards both.

AllGTKTests Test_GtkConverter ‑ test_HeuristicASCII_dollarSign
AllGTKTests Test_GtkConverter ‑ test_HeuristicASCII_emptyString
AllGTKTests Test_GtkConverter ‑ test_HeuristicASCII_letterA
AllGTKTests Test_GtkConverter ‑ test_HeuristicASCII_letters
AllGTKTests Test_GtkConverter ‑ test_HeuristicUTF16LE_null
AllGTKTests Test_GtkConverter ‑ test_HeuristicUTF16_AsciiLetters
AllGTKTests Test_GtkConverter ‑ test_HeuristicUTF16_Asciiletter
AllGTKTests Test_GtkConverter ‑ test_HeuristicUTF16_LotsOfLetters
AllGTKTests Test_GtkConverter ‑ test_HeuristicUTF16_letter
AllGTKTests Test_GtkConverter ‑ test_HeuristicUTF16_letters
…

org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[1000]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[100]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[101]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[102]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[103]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[104]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[105]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[106]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[107]
org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest ‑ test_OpenShell()[108]
…

♻️ This comment has been updated with latest results.

[jonahgraham]

Well - it worked on the build machine - so that is good. But it does mean I have exposed a possible GTK bug, or perhaps an out of date library on my machine.

[INFO] Tests run: 1000, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 62.95 s -- in org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest

[akurtakov]

It could even be newer libs on your machine .

[laeubi]

Well - it worked on the build machine - so that is good. But it does mean I have exposed a possible GTK bug, or perhaps an out of date library on my machine.

[INFO] Tests run: 1000, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 62.95 s -- in org.eclipse.swt.tests.junit.OpenShellManyManyTimesTest

It could be that its a multithreading issue, the Buildnodes usually only have 2 cores so not much parallelism.