feat: Add App Hangs tracking

[brustolin]

📜 Description

When the app stops responding we should create an error event reporting it.

💡 Motivation and Context

Close #1052

💚 How did you test it?

Unit test

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• Review from the native team if needed
• No breaking changes

🔮 Next steps

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 3c6bcad

[bruno-garcia]

@vaind and @marandaneto as they know about ANR on Android and Unity

[vaind]

Some notes below, I'm not confident in my understanding of sentry-cocoa to fully review this.

[codecov-commenter]

Codecov Report

Merging #1861 (2737889) into master (472d146) will increase coverage by 0.06%.
The diff coverage is 97.26%.

❗ Current head 2737889 differs from pull request most recent head 3c6bcad. Consider uploading reports for the commit 3c6bcad to get more accurate results

@@            Coverage Diff             @@
##           master    #1861      +/-   ##
==========================================
+ Coverage   91.91%   91.98%   +0.06%     
==========================================
  Files         200      200              
  Lines        9450     9557     +107     
==========================================
+ Hits         8686     8791     +105     
- Misses        764      766       +2     

Impacted Files	Coverage Δ
Sources/Sentry/SentryClient.m	99.15% <ø> (ø)
Sources/Sentry/include/SentryDependencyContainer.h	30.00% <0.00%> (-3.34%)	⬇️
Sources/Sentry/SentryOptions.m	99.19% <83.33%> (-0.40%)	⬇️
Sources/Sentry/SentryANRTrackingIntegration.m	95.55% <96.66%> (-4.45%)	⬇️
Sources/Sentry/SentryANRTracker.m	98.93% <97.87%> (-1.07%)	⬇️
Sources/Sentry/Public/SentryOptions.h	100.00% <100.00%> (ø)
...s/Sentry/SentryCrashDefaultMachineContextWrapper.m	100.00% <100.00%> (ø)
Sources/Sentry/SentryDependencyContainer.m	92.68% <100.00%> (+1.13%)	⬆️
...rces/Sentry/SentryOutOfMemoryTrackingIntegration.m	100.00% <100.00%> (+2.27%)	⬆️
Sources/Sentry/SentryStacktraceBuilder.m	89.18% <100.00%> (+2.98%)	⬆️
... and 9 more

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[philipphofmann]

First pass, still have plenty of files to review. Thanks for doing this @brustolin.

[brustolin]

An alternative would to look into each thread for the one that contains the main function as first frame

I'm not sure if this would also work for release builds.

AFAIK, for iOS, the app entry point is a main function, created manually or by the compiler, does not matter the build configuration. For MacOS it may be called start

But I like this idea better

SentryCrashThread mainThreadID = pthread_mach_thread_np(pthread_self());

[bruno-garcia]

Flaky test?

REF_NAME: 1861/merge
CONFIGURATION: Test
2022-06-14 13:[5](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:6)0:21.730 xcodebuild[3[6](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:7)51:14285] [MT] DVTAssertions: Warning in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-18212/IDEFoundation/Testing/IDETestRunSpecificationBuilder.m:6[7](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:8)8
Details:  Failed to compute path to baseline file during test run spec construction: <XCTHTestRunSpecification: 0x7fd69f9ae740>
Object:   <IDETestRunSpecificationBuilder>
Method:   +testRunSpecificationsForTestingSpecifiers:scheme:buildables:withBuildParameters:additionalEnvironmentVariables:additionalCommandLineArguments:testRerunPolicy:includeClangProfileParameters:shouldDebugAppExtensions:error:
Thread:   <NSThread: 0x7fd69c41a920>{number = 1, name = main}
Please file a bug at https://feedbackassistant.apple.com with this warning message and any useful information you can provide.
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................T......................T......................T................T..........................................................................................................................................................................................................................................................................................................................................................................................................................T.T.................................................................................................................................................................................................................................................................................................................................................................
2022-06-14 13:57:12.370 xcodebuild[3651:142[8](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:9)5] [MT] IDETestOperationsObserverDebug: [10](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:11)8.000 elapsed -- Testing started completed.
2022-06-14 13:57:[12](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:13).370 xcodebuild[3651:14285] [MT] IDETestOperationsObserverDebug: 0.000 sec, +0.000 sec -- start
2022-06-14 [13](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:14):57:12.370 xcodebuild[3651:[14](https://github.com/getsentry/sentry-cocoa/runs/6881692740?check_suite_focus=true#step:8:15)285] [MT] IDETestOperationsObserverDebug: 108.000 sec, +108.000 sec -- end
Failing tests:
	SentryTests:
		SentryThreadInspectorTests.testStacktraceHasFrames_forEveryThread()

[brustolin]

Flaky test?

But only on Catalyst.

[philipphofmann]

@bruno-garcia, made a valid point that we should maybe turn this off by default for now to get some feedback before turning it on by default. We can add it to the list of new features in the wizard.

[philipphofmann]

LGTM, expect we should disable this per default. When you disable App Hang tracking, we still track them for OOMs to avoid false OOMs right?

[brustolin]

When you disable App Hang tracking, we still track them for OOMs to avoid false OOMs right?

Yes.

[philipphofmann]

LGTM 🚀