[PATCH] D20410: [LibFuzzer] Fix implementation of ``GetPeakRSSMb()`` on Mac OSX

[Dan Liew via llvm-commits]

delcypher created this revision.
delcypher added reviewers: kcc, kubabrecka.
delcypher added subscribers: llvm-commits, kcc, kubabrecka.

[LibFuzzer]
Fix implementation of ``GetPeakRSSMb()`` on Mac OSX. On Linux
``rusage.ru_maxrss`` is in KiB but on Mac OSX it is in
bytes.

http://reviews.llvm.org/D20410

Files:
  lib/Fuzzer/FuzzerUtil.cpp

Index: lib/Fuzzer/FuzzerUtil.cpp
===================================================================
--- lib/Fuzzer/FuzzerUtil.cpp
+++ lib/Fuzzer/FuzzerUtil.cpp
@@ -273,7 +273,15 @@
   struct rusage usage;
   if (getrusage(RUSAGE_SELF, &usage))
     return 0;
+#ifdef __linux__
+  // ru_maxrss is in KiB
   return usage.ru_maxrss >> 10;
+#elif __APPLE__
+  // ru_maxrss is in bytes
+  return usage.ru_maxrss >> 20;
+#else
+#error "GetPeakRSSMb() is not implemented for your platform"
+#endif
 }
 
 }  // namespace fuzzer


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