Segfault on iOS static probe

[conor888]

I have successfully built a static probe for iOS using a CMake toolchain, everything builds and links successfully, and I've included staticprobe.h and the GAMMARAY_STATIC_INJECT macro in my application. The app starts fine on an iPad Pro, but then doesn't respond to any input, and after 10-20 seconds, Xcode shows segfaults.

Build setup:

• macOS Monterey 12.0
• Xcode 13.0
• Qt 5.15.6 for iOS
• iOS 14.7.1 on iPad Pro
• CMake iOS toolchain from: https://github.com/leetal/ios-cmake
• CMake 3.18.0
• GammaRay 2.11.2, then tried building from master, same results

Build process:

• Modified 3rdparty/kde/CMakeLists.txt and set gammaray_kitemmodels to STATIC instead of SHARED
• Modified plugins/widgetinspector/CMakeLists.txt and set gammaray_widget_export_actions to STATIC instead of SHARED (just to get the build to complete, even though I'm not linking it)
• mkdir build ; cd build
• cmake -DCMAKE_TOOLCHAIN_FILE=~/Downloads/ios-cmake-4.2.0/ios.toolchain.cmake -DPLATFORM=OS64 -G Xcode -DCMAKE_PREFIX_PATH=/Users/<username>/Qt/5.15.6/ios -DGAMMARAY_BUILD_UI=OFF -DGAMMARAY_STATIC_PROBE=ON -DENABLE_BITCODE=0 -DDEPLOYMENT_TARGET=12.0 ..
• cmake --build . --config Release
• Build will fail ~90% of the way through on gammaray_geopositioninfosource
• Open generated GammaRay.xcodeproject
• Delete gammaray_geopositioninfosource and gammaray_geopositioninfosource_autogen targets
• Run cmake --build . --config Release again
• Build successful

Project setup:

• Included staticprobe.h in project
• GAMMARAY_STATIC_INJECT macro
• Include the following libraries in .pro project file:
  • gammaray_actioninspector_plugin.a
  • gammaray_codecbrowser_plugin.a
  • gammaray_eventmonitor_plugin.a
  • gammaray_fontbrowser_plugin.a
  • gammaray_guisupport.a
  • gammaray_probe.a
  • gammaray_qmlsupport.a
  • gammaray_quickinspector.a
  • gammaray_sceneinspector_plugin.a
  • gammaray_signalmonitor.a
  • gammaray_statemachineviewer_plugin.a
  • gammaray_styleinspector_plugin.a
  • gammaray_timertop_plugin.a
  • gammaray_translatorinspector.a
  • gammaray_widgetinspector_plugin.a
  • libgammaray_common-qt5_15-aarch64.a
  • libgammaray_common_internal.a
  • libgammaray_core-qt5_15-aarch64.a
  • libgammaray_kitemmodels-qt5_15-aarch64.a
  • libgammaray_quickinspector_shared.a
  • libgammaray_signalmonitor_shared.a
• Add QT += scxml in .pro file since gammaray_statemachineviewer_plugin.a relies on it
• Builds and links successfully

Running:

• Starts up with error: Failed to connect to launcher, can't receive probe settings! "QLocalSocket::connectToServer: Invalid name"
• App does not respond to any touch, buttons don't work, etc.
• Shortly after, segfault occurs seemingly stemming from GammaRay attempting to inject its logo in the window icon, which iOS does not have:
  • 

Any help would be much appreciated! I know it's a lot and this likely isn't a supported use case, but I feel it's 90% of the way there to working on iOS as a static probe! Thanks

[conor888]

Any update on this? Over a year later and I tried pulling master and doing a build again. It seems now I don't have any issue with building gammaray_geopositioninfosource as I did last time, but still the application on iOS will start with the same error Failed to connect to launcher, can't receive probe settings! "QLocalSocket::connectToServer: Invalid name", and not respond to user input on the iPad screen.

[Waqar144]

sorry, no updates so far. I don't have an apple machine to test/debug stuff. However, patches are welcome.