[PATCH] D65775: [Sanitizer] Linux explicitally migrate shadow mapping to Transparent Huge Page

[David CARLIER via Phabricator via llvm-commits]

devnexen created this revision.
devnexen added a reviewer: vitalybuka.
devnexen created this object with visibility "All Users".
Herald added subscribers: llvm-commits, Sanitizers, kubamracek.
Herald added projects: LLVM, Sanitizers.

in madvise mode, the shadow pages will be migrated only via madvise explicit calls.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D65775

Files:
  compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp


Index: compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
+++ compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
@@ -72,7 +72,7 @@
 #ifdef MADV_NOHUGEPAGE  // May not be defined on old systems.
   if (common_flags()->no_huge_pages_for_shadow)
     return madvise((char *)addr, size, MADV_NOHUGEPAGE) == 0;
-  return true;
+  return madvise((char *)addr, size, MADV_HUGEPAGE) == 0;
 #else
   return true;
 #endif  // MADV_NOHUGEPAGE


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