[compiler-rt] dc3388b - [msan] Respect no_huge_pages_for_shadow.

[Evgenii Stepanov via llvm-commits]

Author: Evgenii Stepanov
Date: 2020-08-01T16:59:51-07:00
New Revision: dc3388b0209d17f7ee2f4dc3e4f072dc397dd75d

URL: https://github.com/llvm/llvm-project/commit/dc3388b0209d17f7ee2f4dc3e4f072dc397dd75d
DIFF: https://github.com/llvm/llvm-project/commit/dc3388b0209d17f7ee2f4dc3e4f072dc397dd75d.diff

LOG: [msan] Respect no_huge_pages_for_shadow.

Disable huge pages in the MSan shadow region when
no_huge_pages_for_shadow == true (default).

Differential Revision: https://reviews.llvm.org/D85061

Added: 
    

Modified: 
    compiler-rt/lib/msan/msan_linux.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/msan/msan_linux.cpp b/compiler-rt/lib/msan/msan_linux.cpp
index d61e9dee3065..bfdae0b920c9 100644
--- a/compiler-rt/lib/msan/msan_linux.cpp
+++ b/compiler-rt/lib/msan/msan_linux.cpp
@@ -142,7 +142,7 @@ bool InitShadow(bool init_origins) {
     if (map) {
       if (!CheckMemoryRangeAvailability(start, size))
         return false;
-      if (!MmapFixedNoReserve(start, size, kMemoryLayout[i].name))
+      if (!MmapFixedSuperNoReserve(start, size, kMemoryLayout[i].name))
         return false;
       if (common_flags()->use_madv_dontdump)
         DontDumpShadowMemory(start, size);