[UIKit] Wrap the call to UIApplicationMain in a @try/@catch handler.

[rolfbjarne]

Wrap the call to UIApplicationMain in a @try/@catch handler, and convert any
Objective-C exceptions to a managed exception.

This way the managed Main method (which calls UIApplication.Main) will be able
to catch any Objective-C exceptions.

[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

Legacy Xamarin (No breaking changes)

• iOS (no change detected)
• tvOS (no change detected)
• watchOS (no change detected)
• macOS (no change detected)

NET (empty diffs)

• iOS: (empty diff detected)
• tvOS: (empty diff detected)
• MacCatalyst: (empty diff detected)
• macOS: (empty diff detected)

✅ API diff vs stable

Legacy Xamarin (No breaking changes)

• iOS: vsdrops gist (No breaking changes)
• tvOS: vsdrops gist (No breaking changes)
• watchOS: vsdrops gist (No breaking changes)
• macOS: vsdrops gist (No breaking changes)

.NET (No breaking changes)

• iOS: vsdrops gist (No breaking changes)
• tvOS: vsdrops gist (No breaking changes)
• MacCatalyst: vsdrops gist (No breaking changes)
• macOS: vsdrops gist (No breaking changes)
• Microsoft.iOS vs Microsoft.MacCatalyst: vsdrops gist

Legacy Xamarin (stable) vs .NET

• iOS: vsdrops gist
• tvOS: vsdrops gist
• macOS: vsdrops gist

✅ Generator diff

Generator diff is empty

Pipeline on Agent
Hash: 04b396b1656762be8d11058b49dbf1651136dea2 [PR build]

[vs-mobiletools-engineering-service2]

💻 [PR Build] Tests on macOS Mac Catalina (10.15) passed 💻

✅ All tests on macOS Mac Catalina (10.15) passed.

Pipeline on Agent
Hash: 04b396b1656762be8d11058b49dbf1651136dea2 [PR build]

[vs-mobiletools-engineering-service2]

📚 [PR Build] Artifacts 📚

Packages generated

View packages

• Microsoft.iOS.Bundle.15.4.338-ci.pr.gh15746.pkg
• Microsoft.iOS.Ref.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Runtime.ios-arm.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Runtime.ios-arm64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Runtime.iossimulator-arm64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Runtime.iossimulator-x64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Runtime.iossimulator-x86.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Sdk.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Templates.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.iOS.Windows.Sdk.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.MacCatalyst.Bundle.15.4.338-ci.pr.gh15746.pkg
• Microsoft.MacCatalyst.Ref.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.MacCatalyst.Runtime.maccatalyst-arm64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.MacCatalyst.Runtime.maccatalyst-x64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.MacCatalyst.Sdk.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.MacCatalyst.Templates.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.macOS.Bundle.12.3.338-ci.pr.gh15746.pkg
• Microsoft.macOS.Ref.12.3.338-ci.pr.gh15746.nupkg
• Microsoft.macOS.Runtime.osx-arm64.12.3.338-ci.pr.gh15746.nupkg
• Microsoft.macOS.Runtime.osx-x64.12.3.338-ci.pr.gh15746.nupkg
• Microsoft.macOS.Sdk.12.3.338-ci.pr.gh15746.nupkg
• Microsoft.macOS.Templates.12.3.338-ci.pr.gh15746.nupkg
• Microsoft.NET.Sdk.iOS.Manifest-6.0.300.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.NET.Sdk.MacCatalyst.Manifest-6.0.300.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.NET.Sdk.macOS.Manifest-6.0.300.12.3.338-ci.pr.gh15746.nupkg
• Microsoft.NET.Sdk.tvOS.Manifest-6.0.300.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.NET.Workload.iOS.15.4.338-ci.pr.gh15746.msi
• Microsoft.tvOS.Bundle.15.4.338-ci.pr.gh15746.pkg
• Microsoft.tvOS.Ref.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.tvOS.Runtime.tvos-arm64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.tvOS.Runtime.tvossimulator-arm64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.tvOS.Runtime.tvossimulator-x64.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.tvOS.Sdk.15.4.338-ci.pr.gh15746.nupkg
• Microsoft.tvOS.Templates.15.4.338-ci.pr.gh15746.nupkg
• xamarin.ios-15.13.0.34.pkg
• xamarin.mac-8.13.0.34.pkg

Pipeline on Agent XAMBOT-1162.Monterey'
Hash: 04b396b1656762be8d11058b49dbf1651136dea2 [PR build]

[vs-mobiletools-engineering-service2]

❌ [PR Build] Tests on macOS M1 - Mac Big Sur (11.5) failed ❌

Failed tests are:

• introspection
• xammac_tests
• monotouch-test

Pipeline on Agent
Hash: 04b396b1656762be8d11058b49dbf1651136dea2 [PR build]

[vs-mobiletools-engineering-service2]

🔥 [CI Build] Test results 🔥

Test results

❌ Tests failed on VSTS: simulator tests

0 tests crashed, 1 tests failed, 222 tests passed.

Failures

❌ mmp tests

1 tests failed, 1 tests passed.

• mmptest/macOS/Debug: Failed (Execution failed with exit code 2)

Html Report (VSDrops) Download

Successes

✅ bcl: All 69 tests passed. Html Report (VSDrops) Download
✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests: All 1 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 7 tests passed. Html Report (VSDrops) Download
✅ framework: All 8 tests passed. Html Report (VSDrops) Download
✅ generator: All 2 tests passed. Html Report (VSDrops) Download
✅ interdependent_binding_projects: All 7 tests passed. Html Report (VSDrops) Download
✅ install_source: All 1 tests passed. Html Report (VSDrops) Download
✅ introspection: All 8 tests passed. Html Report (VSDrops) Download
✅ linker: All 65 tests passed. Html Report (VSDrops) Download
✅ mac_binding_project: All 1 tests passed. Html Report (VSDrops) Download
✅ mononative: All 12 tests passed. Html Report (VSDrops) Download
✅ monotouch: All 23 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ mtouch: All 1 tests passed. Html Report (VSDrops) Download
✅ xammac: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 8 tests passed. Html Report (VSDrops) Download
✅ xtro: All 2 tests passed. Html Report (VSDrops) Download

Pipeline on Agent
Hash: [PR build]

[rolfbjarne]

Test failure is unrelated (https://github.com/xamarin/maccore/issues/2612).

[chamons]

Any reason we couldn't do this for NSApplicationMain as well?

[rolfbjarne]

@chamons it's less useful, because NSApplicationMain (or other method slightly further up the stack, I don't remember exactly) will catch any Objective-C exceptions and just ignore them (so the exceptions would never reach our custom code).