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/t95.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 tools/guest-diag/wall2/t95.py

(limited to 'tools/guest-diag/wall2/t95.py')

diff --git a/tools/guest-diag/wall2/t95.py b/tools/guest-diag/wall2/t95.py
new file mode 100644
index 0000000..8daf6ca
--- /dev/null
+++ b/tools/guest-diag/wall2/t95.py
@@ -0,0 +1,19 @@
+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))
+print("--- wait site +0xA12D90..:")
+print(gr("x/60i 0x%x" % (base + 0xA12D90), to_string=True))
+print("--- caller +0xD690D0..:")
+print(gr("x/40i 0x%x" % (base + 0xD690D0), to_string=True))
+print("T95-DONE")
-- 
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