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[Diagnostics] Enable .NET Runtime crash reporting before signal chaining#11291
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…ash reporting before signal chaining Agent-Logs-Url: https://github.com/dotnet/android/sessions/55e4fb9d-2935-4e5a-961c-386c256574cc Co-authored-by: mdh1418 <16830051+mdh1418@users.noreply.github.com>
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[WIP] Enable .NET Runtime crash reporting before signal chaining
[Diagnostics] Enable .NET Runtime crash reporting before signal chaining
May 5, 2026
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Same question I had here, does this need to be public?
If it's something a customer won't understand/use, it could be $(_AndroidEnableDiagnosticCrashReporting) and undocumented. It would only exist as an optional escape hatch.
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Renamed to _AndroidEnableDiagnosticCrashReporting and removed the docs in fc677d6. It's now an undocumented internal escape hatch only.
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…entation Agent-Logs-Url: https://github.com/dotnet/android/sessions/aabc6bed-6957-4252-826a-3d338ef4592f Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>
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May 13, 2026
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Pull request overview
This PR updates the Android SDK MSBuild runtimeconfig wiring to enable .NET runtime crash reporting before Android’s signal chaining runs, so managed crash reporting can execute instead of the process being terminated first.
Changes:
- Introduces an internal
_AndroidEnableDiagnosticCrashReportingMSBuild property (defaulting totrue). - Emits
System.Runtime.CrashReportBeforeSignalChainingas aRuntimeHostConfigurationOption, driven by that property.
jonathanpeppers
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May 13, 2026
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May 15, 2026
### Add NativeCrashProducesManagedStackTrace device test Adds an MSBuildDeviceIntegration test that verifies the System.Runtime.CrashReportBeforeSignalChaining config option works end-to-end on CoreCLR. The test builds a Release app that triggers a native SIGSEGV via P/Invoke to libc memset(NULL), then checks logcat for the managed stack trace logged by the DOTNET tag before Android's signal handler takes over. See: #11291 See: dotnet/runtime#123735 ### Assert SIGSEGV signal and add runtime PR reference - Assert that logcat contains both SIGSEGV signal and ForceNativeSegfault managed frame from the DOTNET tag - Add reference to dotnet/runtime#123824 which implements the managed callstack logging Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Android registers signal handlers before .NET's runtime, causing Android to kill the process before .NET crash reporting can run. The
System.Runtime.CrashReportBeforeSignalChainingproperty (dotnet/runtime#123735) allows flipping this order.Changes
Microsoft.Android.Sdk.RuntimeConfig.targets: Add internal_AndroidEnableDiagnosticCrashReportingMSBuild property (defaulttrue) and wire it toSystem.Runtime.CrashReportBeforeSignalChainingviaRuntimeHostConfigurationOptionWith this enabled, managed callstacks are logged and a crash report JSON is written to disk on crash (dotnet/runtime#123824, dotnet/runtime#126916).
The property is internal and undocumented, serving only as an escape hatch if the behavior needs to be disabled: