labath wrote: We already have one piece of "status" parsing code in `source/Host/linux/Host.cpp`. I think it'd be better to reuse that one. I'm slightly torn as to whether reuse Host::GetProcessInfo for this (and add a new field to ProcessInstanceInfo -- or possibly expand on IsZombie), or whether to create a new linux-specific entry point which will return this data.
> Some caveats that I need to address before we publish this PR is how to > prevent LLDB from running any expressions or really anything that trys to > SIGCONT, because that will immediately terminate the process, I would like > this behavior to mimic how we inform the user post mortem processes can't run > expressions. I don't know the answer to that, but I can say that I don't think this feature needs to be (or should be) specific to this use case. One of the things that I would like to be able to do is to stop a process right before it exits (regardless of whether that's through the exit syscall, or a fatal signal, etc.). `PTRACE_O_TRACEEXIT` lets you do that, but it means the process will end up in the same "almost a zombie" state, where any attempt to resume it will cause it to disappear. If we had a mechanism to prevent this, we could use it in this case as well. (and this case, unlike this "dead" state, is actually testable). I think the tricky part is that (in both cases) the user might legitimately want to let the process exit, and "continue" is the normal way to do that, so I don't think we'd want to just error out of the continue command (or from the `vCont` packet). I think what we'd want is to make sure that the process doesn't accidentally exit while running an expression (possibly from within a data formatter), and for that I guess we'd need to let lldb know that running expressions is "dangerous". We already have `Thread::SafeToCallFunctions`, even though it's used for a slightly different purpose, but *maybe* it could be extended to handle this as well? https://github.com/llvm/llvm-project/pull/137041 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
