def test_pfn_to_from_page(self):
with self._pages() as (map, _, pfns):
for i, pfn in enumerate(pfns):
page = pfn_to_page(self.prog, pfn)
# Test that we got the correct page by looking at the index: it
# should be page i in the file.
self.assertEqual(page.index, i)
# Test the opposite direction.
self.assertEqual(page_to_pfn(page), pfn)
def lookup_cache_by_address(obj: drgn.Object) -> Optional[drgn.Object]:
pfn = virt_to_pfn(sdb.get_prog(), obj)
page = pfn_to_page(pfn)
cache = page.slab_cache
try:
# read the name to force FaultError if any
_ = cache.name.string_().decode('utf-8')
except drgn.FaultError:
return None
return cache
def test_decode_page_flags(self):
with self._pages() as (map, _, pfns):
page = pfn_to_page(self.prog, pfns[0])
self.assertIn("PG_swapbacked", decode_page_flags(page))