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[PLAT-4707] Record thread information for unhandled JS errors #766

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merged 6 commits into from
Jul 31, 2020

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fractalwrench
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@fractalwrench fractalwrench commented Jul 29, 2020

Goal

Records thread information for unhandled JS errors. The thread information was not captured for unhandled JS errors when BSGThreadSendPolicyUnhandledOnly was set because the native layer used the presence of BSG_KSCrashTypeUserReported as the crashType to determine whether an error was unhandled instead.

This change alters the captureThreadTrace method to calculate whether threads should be captured or not, and sets threadTracingEnabled appropriately. By default this value is set when installing KSCrash - for handled errors this value is overwritten.

Additionally the crash context has been set to a local struct, which avoids the scenario where multiple notify calls overwrite a global struct.

Note: sending a handled error will overwrite the crash context currently which means the thread send behaviour is incorrect for unhandled errors sent after handled errors. This will be addressed in a separate PR which avoids reusing the crash context.

Tests

Covered by existing E2E test coverage, additionally verified in an Objective C example app against handled + unhandled errors.

References

@fractalwrench fractalwrench marked this pull request as ready for review July 29, 2020 14:40
@tomlongridge tomlongridge self-requested a review July 29, 2020 15:25
@fractalwrench fractalwrench marked this pull request as draft July 30, 2020 09:54
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Addressed review feedback

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2 minor points, but otherwise LGTM

@fractalwrench fractalwrench marked this pull request as ready for review July 30, 2020 15:10
@tomlongridge tomlongridge changed the title Record thread information for unhandled JS errors [PLAT-4707] Record thread information for unhandled JS errors Jul 31, 2020
@tomlongridge tomlongridge merged commit 20d33f8 into react-native-plugin Jul 31, 2020
@tomlongridge tomlongridge deleted the rn-thread-unhandled branch July 31, 2020 14:30
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2 participants