wall2 session 90: current-boot wait site identified (eglcore+0xB2852D in-process word pair wait inside vkCreateInstance; old 0xa85d24/16K sites dead this boot); t83 sampler + widened nudge tools; multi-word nudge trips -4 (caution confirmed)

1 files changed, 32 insertions, 0 deletions

diff --git a/tools/guest-diag/wall2/t80r.py b/tools/guest-diag/wall2/t80r.py
new file mode 100644
index 0000000..ac2263b
--- /dev/null
+++ b/tools/guest-diag/wall2/t80r.py
@@ -0,0 +1,32 @@
+import gdb, sys
+inf = gdb.selected_inferior()
+pid = inf.pid
+cands = []
+for line in open("/proc/%d/maps" % pid):
+    if "nvidiactl" in line and "rw-s" in line:
+        parts = line.split()
+        try:
+            lo, hi = [int(x,16) for x in parts[0].split('-')]
+        except Exception:
+            continue
+        if hi - lo == 0x4000:
+            cands.append(lo + 0x80)
+print("CANDIDATES %s" % ["0x%x" % c for c in cands])
+class W(gdb.Breakpoint):
+    def __init__(self, addr):
+        super().__init__("*(unsigned int*)0x%x" % addr, gdb.BP_WATCHPOINT, gdb.WP_READ, internal=False)
+        self.addr = addr
+        self.silent = True
+    def stop(self):
+        print("READWORD 0x%x" % self.addr)
+        return True
+armed = 0
+for c in cands:
+    try:
+        W(c); armed += 1
+    except Exception as e:
+        print("watchfail 0x%x: %s" % (c, e))
+print("ARMED %d" % armed)
+if armed:
+    gdb.execute("continue")
+print("T80R-DONE")