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#!/usr/bin/env python3
# pool_page.py <pa-hex> - dump the UVM semaphore-pool page's u32 slots via
# /proc/kcore (guest root). The pool VA 0x121000000 maps to the PA the
# scanner+host pinned; nonzero slots are the applied release values. Compare
# against the tracker's expected payload (tracker_walk.py) and the driver's
# uvsv wait value to find write-target divergence / starvation.
import sys
import struct
pa = int(sys.argv[1], 16) if len(sys.argv) > 1 else 0x107fd8000
sys.argv = ["pool_page"]
sys.path.insert(0, "/tmp")
import guest_pin_stream as g # noqa: E402
kc = g.Kcore()
if not kc.load():
print("KCORE LOAD FAILED")
sys.exit(1)
nz = []
for off in range(0, 0x1000, 4):
d = kc.read(kc.page_offset_base + pa + off, 4)
v = struct.unpack("<I", d)[0] if d else 0
if v:
nz.append((off, v))
print("pa=0x%x nonzero slots=%d" % (pa, len(nz)))
for off, v in nz[:64]:
print("off=0x%x val=%u" % (off, v))
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