From c4a1d573cce887dba6a3c65d86efd5662b1cec1c Mon Sep 17 00:00:00 2001
From: Arthur Hanson Rasmusson <arthur@vgpu.io>
Date: Sun, 25 Oct 2026 12:05:14 -0400
Subject: wall2 session 91: vkCreateInstance wall BREACHED - the event-slot
 pending-marker (u16@+0xe=0xffff) cleared at each +0xB33D30 retry entry passes
 the instance phase for the first time; client then persists in
 vkCreateDevice's nvidia0 poll waiting for the event-fd signal (guest dispatch
 gap); tools t93/t94/t96b/t97

---
 tools/guest-diag/wall2/t97.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 tools/guest-diag/wall2/t97.py

(limited to 'tools/guest-diag/wall2/t97.py')

diff --git a/tools/guest-diag/wall2/t97.py b/tools/guest-diag/wall2/t97.py
new file mode 100644
index 0000000..5a12348
--- /dev/null
+++ b/tools/guest-diag/wall2/t97.py
@@ -0,0 +1,22 @@
+import gdb
+gr = gdb.execute
+inf = gdb.selected_inferior()
+pid = inf.pid
+base = None
+for line in open("/proc/%d/maps" % pid):
+    parts = line.split()
+    try:
+        lo, hi = [int(x,16) for x in parts[0].split('-')]
+    except Exception:
+        continue
+    if base is None and "libnvidia-eglcore" in line and int(parts[2],16) == 0:
+        base = lo
+print("BASE 0x%x" % (base or 0))
+C = base + 0x2070b7c
+v = int(gdb.parse_and_eval("*(unsigned int*)0x%x" % C))
+print("COUNT %u" % v)
+print(gr("x/8wx 0x%x" % (C - 0x10), to_string=True))
+if v:
+    gr("set {unsigned int}0x%x = 0" % C)
+    print("WROTE 0")
+print("T97-DONE")
-- 
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