[llvm] [lldb] Add release note about ELF `thread siginfo` and negative SI Codes. (PR #141631)

[Jacob Lalonde via llvm-commits]

https://github.com/Jlalond updated https://github.com/llvm/llvm-project/pull/141631

>From aceb000cc14e0459361008ce63ed9e8fa10ba7e2 Mon Sep 17 00:00:00 2001
From: Jacob Lalonde <jalalonde at fb.com>
Date: Tue, 27 May 2025 09:43:18 -0700
Subject: [PATCH] Make release note for thread siginfo changes and negative
 si_codes

---
 llvm/docs/ReleaseNotes.md | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/llvm/docs/ReleaseNotes.md b/llvm/docs/ReleaseNotes.md
index f1d1ce0ada227..c3a3bd67bd8da 100644
--- a/llvm/docs/ReleaseNotes.md
+++ b/llvm/docs/ReleaseNotes.md
@@ -196,7 +196,7 @@ Changes to the RISC-V Backend
 * `-mcpu=sifive-p870` was added.
 * Adds assembler support for the Andes `XAndesvpackfph` (Andes Vector Packed FP16 extension).
 * Adds assembler support for the Andes `XAndesvdot` (Andes Vector Dot Product extension).
-* Adds assembler support for the standard `Q` (Quad-Precision Floating Point) 
+* Adds assembler support for the standard `Q` (Quad-Precision Floating Point)
   extension.
 * Adds experimental assembler support for the SiFive Xsfmm* Attached Matrix
   Extensions.
@@ -280,6 +280,12 @@ Changes to LLDB
   When using reverse execution, `process continue --forward` returns to the
   forward execution.
 * LLDB now supports RISC-V 32-bit ELF core files.
+* LLDB now supports siginfo descriptions for Linux user-space signals. User space
+  signals will now have descriptions describing the method and sender.
+  ```
+    stop reason = SIGSEGV: sent by tkill system call (sender pid=649752, uid=2667987)
+  ```
+* ELF Cores can now have their siginfo structures inspected using `thread siginfo`.
 
 ### Changes to lldb-dap