[Lldb-commits] [lldb] [lldb] [DynamicLoaderPOSIXDYLD] Enable POSIX-DYLD for QNX (PR #97536)

[Ayush Sahay via lldb-commits]

https://github.com/ayushsahay1837 created https://github.com/llvm/llvm-project/pull/97536

This change enables the _POSIX_ dynamic loader plugin for _QNX_, and is the fourth in a series of changes that look to facilitate remote debug of _AArch64_ targets on _QNX_.

_QNX Neutrino Real-Time Operating System_ is a commercial Unix-like real-time operating system primarily targeting the embedded systems market including automotive, medical devices, robotics, transportation, and industrial embedded systems.

The series of changes in question looks to provision support for –

- Launching a debuggee
- Attaching to a debuggee
- Having the debuggee come up stopped at the entry point
- Setting breakpoints
- Stopping at breakpoints
- Reading/writing contents of/to the debuggee's memory
- Reading/writing contents of/to the debuggee's registers
- Reading/writing contents of/to the debuggee's variables
- Resuming the debuggee's execution
- Single-stepping the debuggee's execution
- Interrupting the debuggee's execution
- Dumping information pertaining to the debuggee's stack trace

Kindly note that _ptrace_ isn't available on QNX. Instead, _devctl_ can be leveraged to observe and control the execution of a process under debug on _QNX_.

Any additional support (including the facilitation of execution of tests) will be the subject of future work.

>From f98902752ab60d3bdd2f38ce656c1b25ef2c972a Mon Sep 17 00:00:00 2001
From: Ted Woodward <tedwood at quicinc.com>
Date: Thu, 5 Oct 2023 10:31:46 -0500
Subject: [PATCH] [lldb] [DynamicLoaderPOSIXDYLD] Enable POSIX-DYLD for QNX

Enable the POSIX dynamic loader plugin for QNX.
---
 .../DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp        | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
index 51e4b3e6728f2..7bff55e5cd347 100644
--- a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
+++ b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
@@ -54,7 +54,8 @@ DynamicLoader *DynamicLoaderPOSIXDYLD::CreateInstance(Process *process,
     if (triple_ref.getOS() == llvm::Triple::FreeBSD ||
         triple_ref.getOS() == llvm::Triple::Linux ||
         triple_ref.getOS() == llvm::Triple::NetBSD ||
-        triple_ref.getOS() == llvm::Triple::OpenBSD)
+        triple_ref.getOS() == llvm::Triple::OpenBSD ||
+        triple_ref.getOS() == llvm::Triple::QNX)
       create = true;
   }