commit 53e41cd19bcd4e98dcd544603087625a34ac8d13
author Vitaly Buka <vitalybuka@google.com> Thu Jun 03 00:06:45 2021 -0700
committer Copybara-Service <copybara-worker@google.com> Wed Jun 16 18:24:30 2021 -0700
tree a4d0734f31fe222aee2f2d703faf397f22519e0d
parent 4df24f1cea38e1ff071c2f24b03bb21bcc14395b

[NFC][scudo] Avoid integer overflow in test

releasePagesToOS may shrink RSS below the value stored on start.

GitOrigin-RevId: b40908e639b6075c77d7b2a990a2a273a39f4102

tests/common_test.cpp

diff --git a/tests/common_test.cpp b/tests/common_test.cpp
index d8184a7..711e3b2 100644
--- a/tests/common_test.cpp
+++ b/tests/common_test.cpp
@@ -37,16 +37,16 @@
   MapPlatformData Data = {};
   void *P = map(nullptr, Size, "ResidentMemorySize", 0, &Data);
   ASSERT_NE(nullptr, P);
-  EXPECT_LT(getResidentMemorySize() - OnStart, Threshold);
+  EXPECT_LT(getResidentMemorySize(), OnStart + Threshold);
 
   memset(P, 1, Size);
-  EXPECT_GT(getResidentMemorySize() - OnStart, Size - Threshold);
+  EXPECT_GT(getResidentMemorySize(), OnStart + Size - Threshold);
 
   releasePagesToOS((uptr)P, 0, Size, &Data);
-  EXPECT_LT(getResidentMemorySize() - OnStart, Threshold);
+  EXPECT_LT(getResidentMemorySize(), OnStart + Threshold);
 
   memset(P, 1, Size);
-  EXPECT_GT(getResidentMemorySize() - OnStart, Size - Threshold);
+  EXPECT_GT(getResidentMemorySize(), OnStart + Size - Threshold);
 
   unmap(P, Size, 0, &Data);
 }