[GR-38965] Support heap dumps in GraalVM CE Native Image. #4622
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This PR adds support for heap dumps to the Community Edition (CE) of GraalVM Native Image. These dumps use the hprof format and can thus be opened with [VisualVM](https://visualvm.github.io/) like any other Java heap dump. To enable heap dump support, native executables need to be built with the `-H:+AllowVMInspection` build-time option. Afterward, it is possible to create heap dumps in currently three different ways: - The initial heap of a native executable can be dumped using the `-XX:+DumpHeapAndExit` run-time option (e.g., `./helloworld -XX:+DumpHeapAndExit`). - Heap dumps can also be requested at run-time by sending the `SIGUSR1` signal to the running process (`kill -SIGUSR1 <pid>`). - Heap dumps can also be created programmatically using the [`VMRuntime.dumpHeap(String outputFile, boolean live)` API](https://github.com/oracle/graal/blob/6b59dd9b007c1fcc5bf9a16d80fe831209b652c2/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/VMRuntime.java#L77-L89). Co-authored-by: Christian Haeubl <[email protected]> Co-authored-by: Peter Hofer <[email protected]>
olpaw
approved these changes
Jun 7, 2022
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This PR adds support for heap dumps to the Community Edition (CE) of GraalVM Native Image. These dumps use the hprof format and can thus be opened with VisualVM like any other Java heap dump.
To enable heap dump support, native executables need to be built with the
-H:+AllowVMInspectionbuild-time option. Afterward, it is possible to create heap dumps in currently three different ways:-XX:+DumpHeapAndExitrun-time option (e.g.,./helloworld -XX:+DumpHeapAndExit).SIGUSR1signal to the running process (kill -SIGUSR1 <pid>).VMRuntime.dumpHeap(String outputFile, boolean live)API.