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diff --git a/website/content/en/status/report-2022-04-2022-06/lldb.adoc b/website/content/en/status/report-2022-04-2022-06/lldb.adoc new file mode 100644 index 0000000000..93a93ab088 --- /dev/null +++ b/website/content/en/status/report-2022-04-2022-06/lldb.adoc @@ -0,0 +1,24 @@ +=== Ongoing work on LLDB multiprocess debugging support + +Links: + +link:https://www.moritz.systems/blog/multiprocess-support-for-lldb/[Moritz Systems Project Description] URL: link:https://www.moritz.systems/blog/multiprocess-support-for-lldb/[https://www.moritz.systems/blog/multiprocess-support-for-lldb/] + +link:https://www.moritz.systems/blog/implementing-non-stop-protocol-compatibility-in-lldb/[Progress Report 1] URL: link:https://www.moritz.systems/blog/implementing-non-stop-protocol-compatibility-in-lldb/[https://www.moritz.systems/blog/implementing-non-stop-protocol-compatibility-in-lldb/] + +Contact: Kamil Rytarowski <kamil@moritz.systems> + +Contact: Michał Górny <mgorny@moritz.systems> + +According to the upstream description, "LLDB is a next generation, high-performance debugger. It is built as a set of reusable components which highly leverage existing libraries in the larger LLVM Project, such as the Clang expression parser and LLVM disassembler." + +FreeBSD includes LLDB in the base system. +The previous sponsored projects improved LLDB, to make it a credible debugger for the base system, although it still has a few limitations compared to the contemporary versions of GNU GDB. +This project started in April 2022. +It aims to implement full support for debugging multiple processes simultaneously. + +At the start of the project, LLDB featured very limited support for multiprocess debugging. +The client featured support for debugging multiple independent processes simultaneously via maintaining multiple connections to different server instances. +Thanks to our earlier work, the server was able to process `fork(2)` and `vfork(2)` calls and either detach the newly forked child and continue tracing the parent process, or detach the parent and follow the child (equivalent to GDB's `follow-fork-mode` setting). + +Once the project is finished, LLDB will be able to trace an arbitrary number of forked processes simultaneously (equivalent to GDB's `detach-on-fork off`). +Full support for the multiprocess extension to the GDB Remote Serial Protocol will be implemented, as well as partial support for the non-stop extension that will enable multiple processes to be resumed and stopped independently. + +Sponsor: The FreeBSD Foundation |