[compiler-rt] [scudo] Move getResidentPages function (PR #183138)

[via llvm-commits]

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@@ -75,6 +75,14 @@ TEST(ScudoMapDeathTest, MapWithGuardUnmap) {
   MemMap.unmap();
 }
 
+// These death tests only fail when debugging is enabled.
+#if SCUDO_DEBUG && SCUDO_LINUX
+TEST(ScudoMapDeathTest, ResidentPagesNotMapped) {
+  scudo::MemMapT MemMap;
+  ASSERT_EQ(MemMap.getResidentPages(), 0);
+}
+#endif
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ChiaHungDuan wrote:

Not sure if this suggests adding back getResidentPages on out-of-bound range, if so, @sadafebrahimi please ignore my opinion before :) 

https://github.com/llvm/llvm-project/pull/183138