From 2164b35683005d70eab467cb978cc0714eec6eee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herm=C3=A8s=20B=C3=A9lusca-Ma=C3=AFto?=
 <hermes.belusca-maito@reactos.org>
Date: Tue, 19 Aug 2025 14:04:27 +0200
Subject: [PATCH] [NTOS:PS] Implement
 NtQueryInformationThread(ThreadBreakOnTermination)

Invoked by `RtlSetThreadIsCritical()` for returning the previous flag value,
and fixes the following error:
```
(ntoskrnl/ps/query.c:3155) Not implemented: 18
```

The implementation is "identical" to that of NtQueryInformationProcess()
`ProcessBreakOnTermination`, with the necessary adaptations, of course.
---
 ntoskrnl/ps/query.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/ntoskrnl/ps/query.c b/ntoskrnl/ps/query.c
index a33fb840a14..ff5267dd649 100644
--- a/ntoskrnl/ps/query.c
+++ b/ntoskrnl/ps/query.c
@@ -3112,6 +3112,41 @@ NtQueryInformationThread(IN HANDLE ThreadHandle,
             ObDereferenceObject(Thread);
             break;
 
+        case ThreadBreakOnTermination:
+
+            /* Set the return length */
+            Length = sizeof(ULONG);
+
+            if (ThreadInformationLength != Length)
+            {
+                Status = STATUS_INFO_LENGTH_MISMATCH;
+                break;
+            }
+
+            /* Reference the thread */
+            Status = ObReferenceObjectByHandle(ThreadHandle,
+                                               Access,
+                                               PsThreadType,
+                                               PreviousMode,
+                                               (PVOID*)&Thread,
+                                               NULL);
+            if (!NT_SUCCESS(Status))
+                break;
+
+            _SEH2_TRY
+            {
+                *(PULONG)ThreadInformation = Thread->BreakOnTermination;
+            }
+            _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+            {
+                Status = _SEH2_GetExceptionCode();
+            }
+            _SEH2_END;
+
+            /* Dereference the thread */
+            ObDereferenceObject(Thread);
+            break;
+
         case ThreadIsTerminated:
 
             /* Set the return length*/