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Add FAQ about thread dumps in native reference guide #45467

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Add FAQ about thread dumps in native reference guide #45467

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13 changes: 13 additions & 0 deletions docs/src/main/asciidoc/native-reference.adoc
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Expand Up @@ -2301,6 +2301,19 @@ com.oracle.svm.core.VM=GraalVM 22.0.0.2-Final Java 11 Mandrel Distribution

See <<gc-logging,Native Memory Management GC Logging section>> for details.

=== Can I get a thread dump of a native executable?

Yes, Quarkus sets up a signal handler for the `SIGQUIT` signal (or `SIGBREAK` on windows) that will result in a thread
dump being printed when receiving the `SIGQUIT/SIGBREAK` signal.
You may use `kill -SIGQUIT <pid>` to trigger a thread dump.

[NOTE]
====
Quarkus uses its own signal handler, to use GraalVM's default signal handler instead you will need to:
1. Add `-H:+DumpThreadStacksOnSignal` to `quarkus.native.additional-build-args` and rebuild the application.
2. Set the environment variable `DISABLE_SIGNAL_HANDLERS` before running the app.
====

[[heap-dumps]]
=== Can I get a heap dump of a native executable? e.g. if it runs out of memory

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