tsan: reduce internal allocator region from 16M to 1M

16M regions can waste almost 1G for nothing.
Since region size is used only during initial heap growth,
it's unclear why we even need such huge regions.

llvm-svn: 214027

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_allocator_internal.h b/compiler-rt/lib/sanitizer_common/sanitizer_allocator_internal.h
index bc81933..005a010 100644 (file)
--- a/compiler-rt/lib/sanitizer_common/sanitizer_allocator_internal.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_allocator_internal.h
@@ -25,13 +25,12 @@ typedef CompactSizeClassMap InternalSizeClassMap;
 
 static const uptr kInternalAllocatorSpace = 0;
 static const u64 kInternalAllocatorSize = SANITIZER_MMAP_RANGE_SIZE;
-#if SANITIZER_WORDSIZE == 32
 static const uptr kInternalAllocatorRegionSizeLog = 20;
+#if SANITIZER_WORDSIZE == 32
 static const uptr kInternalAllocatorNumRegions =
     kInternalAllocatorSize >> kInternalAllocatorRegionSizeLog;
 typedef FlatByteMap<kInternalAllocatorNumRegions> ByteMap;
 #else
-static const uptr kInternalAllocatorRegionSizeLog = 24;
 static const uptr kInternalAllocatorNumRegions =
     kInternalAllocatorSize >> kInternalAllocatorRegionSizeLog;
 typedef TwoLevelByteMap<(kInternalAllocatorNumRegions >> 12), 1 << 12> ByteMap;