wall2 session 93: zero-ptrace pipeline (t101 instance clears self-disabling + unwait.py 16K/+0x80 word poller) reaches VKDEVICE on r693 with 5 auto-written words and no wedge risk; RM-lock wedge root-caused (gdb killed at a stop inside an RM critical section) with new attach rules + t102 safe diagnostic

1 files changed, 31 insertions, 0 deletions

diff --git a/tools/guest-diag/wall2/t102.py b/tools/guest-diag/wall2/t102.py
new file mode 100644
index 0000000..759d974
--- /dev/null
+++ b/tools/guest-diag/wall2/t102.py
@@ -0,0 +1,31 @@
+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 PID %d" % (base or 0, pid))
+try:
+    pc = int(gdb.parse_and_eval("$pc"))
+    print("PC 0x%x off=0x%x" % (pc, pc - base if base else 0))
+except Exception as e:
+    print("pcfail %s" % e)
+try:
+    C = base + 0x2070B7C
+    print("A8COUNT %u" % int(gdb.parse_and_eval("*(unsigned int*)0x%x" % C)))
+except Exception as e:
+    print("countfail %s" % e)
+try:
+    print(gr("bt 6", to_string=True))
+except Exception as e:
+    print("btfail %s" % e)
+gr("detach")
+gr("quit")
+print("T102-DONE")