Add ProcMemInfo::GetUsageStats
This change adds the GetUsageStats method, which will allow for a
ProcMemInfo object's population of 'usage_' after Smaps(),
MapsWithoutUsageStats(), or ReadMaps() (with get_usage_stats == false)
have been called.
Test: Ran libmeminfo_test with the new MapsUsageFillInAll test case.
Bug: 235410672
Change-Id: Ida94e97785cf948812c2f58bc9b7aa3d80f622b7
Merged-In: Ida94e97785cf948812c2f58bc9b7aa3d80f622b7
diff --git a/libmeminfo_test.cpp b/libmeminfo_test.cpp
index 130c465..f3bb99d 100644
--- a/libmeminfo_test.cpp
+++ b/libmeminfo_test.cpp
@@ -136,6 +136,31 @@
}
}
+TEST(ProcMemInfo, MapsUsageFillInAll) {
+ ProcMemInfo proc_mem(pid);
+ const std::vector<Vma>& maps = proc_mem.MapsWithoutUsageStats();
+ EXPECT_FALSE(maps.empty());
+ for (auto& map : maps) {
+ ASSERT_EQ(0, map.usage.vss);
+ ASSERT_EQ(0, map.usage.rss);
+ ASSERT_EQ(0, map.usage.pss);
+ ASSERT_EQ(0, map.usage.uss);
+ ASSERT_EQ(0, map.usage.swap);
+ ASSERT_EQ(0, map.usage.swap_pss);
+ ASSERT_EQ(0, map.usage.private_clean);
+ ASSERT_EQ(0, map.usage.private_dirty);
+ ASSERT_EQ(0, map.usage.shared_clean);
+ ASSERT_EQ(0, map.usage.shared_dirty);
+ }
+ // GetUsageStats' non-default parameter get_wss is false by default in
+ // ProcMemInfo's constructor.
+ ASSERT_TRUE(proc_mem.GetUsageStats(false));
+ for (auto& map : maps) {
+ // Check that at least one usage stat was updated.
+ ASSERT_NE(0, map.usage.vss);
+ }
+}
+
TEST(ProcMemInfo, PageMapPresent) {
static constexpr size_t kNumPages = 20;
size_t pagesize = getpagesize();
