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, 25 insertions, 0 deletions

diff --git a/tools/guest-diag/wall2/t83.py b/tools/guest-diag/wall2/t83.py
new file mode 100644
index 0000000..5e3cce2
--- /dev/null
+++ b/tools/guest-diag/wall2/t83.py
@@ -0,0 +1,25 @@
+import gdb
+from collections import Counter
+gr = gdb.execute
+pcs = Counter()
+inf = gdb.selected_inferior()
+for i in range(300):
+    try:
+        gr("stepi", to_string=True)
+    except Exception as e:
+        print("stepfail %s" % e); break
+    try:
+        pcs[int(gdb.parse_and_eval("$pc"))] += 1
+    except Exception:
+        break
+print("HOTPCS")
+top = pcs.most_common(4)
+for pc, n in top:
+    print("PC 0x%x hits=%d" % (pc, n))
+for pc, n in top[:1]:
+    try:
+        print(gr("x/10i 0x%x" % pc, to_string=True))
+        print(gr("info registers rax rbx rcx rdx rsi rdi rbp r8 r9 r10 r11 r12 r13 r14 r15", to_string=True))
+    except Exception as e:
+        print("fail %s" % e)
+print("T83-DONE")