meminfo: Add API to read pagemap for a vma within a process.
.. and make sure we have some helper methods exposed to the clients
to do some basic checks for the pagemap values. For example, to check
if the page is present or swapped.
Bug: 111694435
Test: libmeminfo_test 1 --gtest_filter=ValidateProcMemInfo.TestPageMap
Test: libmeminfo_test 1
Change-Id: Ic6ae91f4214b42346f3d0b54164a43ac79d5ade1
Signed-off-by: Sandeep Patil <sspatil@google.com>
diff --git a/libmeminfo/pageacct.cpp b/libmeminfo/pageacct.cpp
index 887a74d..0a26c08 100644
--- a/libmeminfo/pageacct.cpp
+++ b/libmeminfo/pageacct.cpp
@@ -138,5 +138,18 @@
return !!(idle_bits & (1ULL << (pfn % 64)));
}
+// Public methods
+bool page_present(uint64_t pagemap_val) {
+ return PAGE_PRESENT(pagemap_val);
+}
+
+bool page_swapped(uint64_t pagemap_val) {
+ return PAGE_SWAPPED(pagemap_val);
+}
+
+uint64_t page_pfn(uint64_t pagemap_val) {
+ return PAGE_PFN(pagemap_val);
+}
+
} // namespace meminfo
} // namespace android